Settings and Serialization

v3 (2026-04-26): This page has been rewritten for v3. Implementation detail describes the HIDMaestro SDK surface, OpenXInput shim, thread-pool lifecycle, and bubble-up cascade. The deeper architecture rationale lives in HIDMaestro Deep Dive. If something cited here drifts from the live source, the live source wins.

Developer reference for PadForge's settings persistence: XML file format, data models, SettingsManager, and serialization pipeline.

flowchart TD
    subgraph "Save Flow"
        S1[User Action<br/>slider drag · mapping change · toggle] --> S2[SettingsService.MarkDirty]
        S2 --> S3[250ms Debounce Timer<br/>restarts on each call]
        S3 --> S4[UpdatePadSettingsFromViewModels<br/>write ViewModel values to PadSettings]
        S4 --> S5[Flush Mappings + UpdateChecksum<br/>Extended · MIDI · KBM dicts to arrays · MD5]
        S5 --> S6[UpdateActiveProfileSnapshot<br/>deep clone to active profile if named]
        S6 --> S7[Collect Data under SyncRoot<br/>Devices · Settings · PadSettings deduplicated]
        S7 --> S8[Build DTOs<br/>AppSettings · Macros · Profiles]
        S8 --> S9[XmlSerializer.Serialize<br/>write PadForge.xml]
        S9 --> S10[IsDirty = false<br/>raise AutoSaved event]
    end

    subgraph "Load Flow"
        L1[LoadFromFile] --> L2[XmlSerializer.Deserialize<br/>stream to SettingsFileData]
        L2 --> L3[Populate UserDevices<br/>lock · clear · add from XML]
        L3 --> L4[Populate UserSettings<br/>match PadSetting by checksum · CloneDeep]
        L4 --> L5[Purge Orphans<br/>remove stale MapTo entries]
        L5 --> L6[LoadAppSettings<br/>SlotCreated before OutputType]
        L6 --> L7[LoadPadSettings<br/>deadzones · curves · ranges · mappings]
        L7 --> L8[LoadMacros<br/>reconstruct from serialized data]
        L8 --> L9[LoadProfiles<br/>Default profile · restore active profile topology]
    end

    style S1 fill:#e1f5fe
    style S2 fill:#e1f5fe
    style S3 fill:#fff3e0
    style S9 fill:#e8f5e9
    style S10 fill:#e8f5e9
    style L1 fill:#f3e5f5
    style L2 fill:#f3e5f5
    style L4 fill:#fff3e0
    style L9 fill:#e8f5e9

Source files:

PadForge.App/Services/SettingsService.cs. XML load/save, serialization DTOs
PadForge.App/Common/SettingsManager.cs. Thread-safe collections, slot management
PadForge.Engine/Data/PadSetting.cs. Mapping configuration model
PadForge.Engine/Data/UserDevice.cs. Physical device record
PadForge.Engine/Data/UserSetting.cs. Device-to-slot linkage

PadForge.xml File Format

XML document with SettingsFileData as the root element (serialized as <PadForgeSettings>). Lives next to the executable.

File Discovery

SettingsService.FindSettingsFile() search order:

PadForge.xml. Preferred
Settings.xml. Legacy fallback
If neither exists, creates PadForge.xml in the application directory

SettingsFileData (Root DTO)

[XmlRoot("PadForgeSettings")]
public class SettingsFileData
{
    [XmlArray("Devices")]
    [XmlArrayItem("Device")]
    public UserDevice[] Devices { get; set; }

    [XmlArray("UserSettings")]
    [XmlArrayItem("Setting")]
    public UserSetting[] Settings { get; set; }

    [XmlArray("PadSettings")]
    [XmlArrayItem("PadSetting")]
    public PadSetting[] PadSettings { get; set; }

    [XmlElement("AppSettings")]
    public AppSettingsData AppSettings { get; set; }

    [XmlArray("Macros")]
    [XmlArrayItem("Macro")]
    public MacroData[] Macros { get; set; }

    [XmlArray("Profiles")]
    [XmlArrayItem("Profile")]
    public ProfileData[] Profiles { get; set; }
}

Complete XML Structure

<PadForgeSettings>
  <!-- Physical input devices (persisted across sessions) -->
  <Devices>
    <Device>
      <InstanceGuid>00000000-0000-0000-0000-000000000000</InstanceGuid>
      <InstanceName>Xbox Controller</InstanceName>
      <ProductGuid>...</ProductGuid>
      <ProductName>Xbox One Controller</ProductName>
      <VendorId>1118</VendorId>
      <ProdId>654</ProdId>
      <DevRevision>0</DevRevision>
      <DevicePath>\\?\hid#vid_045e&amp;pid_028e...</DevicePath>
      <SerialNumber></SerialNumber>
      <CapAxeCount>6</CapAxeCount>
      <CapButtonCount>11</CapButtonCount>
      <RawButtonCount>11</RawButtonCount>
      <CapPovCount>1</CapPovCount>
      <CapType>21</CapType>
      <CapSubType>0</CapSubType>
      <CapFlags>0</CapFlags>
      <HasGyro>false</HasGyro>
      <HasAccel>false</HasAccel>
      <DateCreated>2025-01-15T10:30:00</DateCreated>
      <DateUpdated>2025-01-15T10:30:00</DateUpdated>
      <IsEnabled>true</IsEnabled>
      <IsHidden>false</IsHidden>
      <DisplayName></DisplayName>
      <HidHideEnabled>false</HidHideEnabled>
      <ConsumeInputEnabled>false</ConsumeInputEnabled>
      <ForceRawJoystickMode>false</ForceRawJoystickMode>
      <HidHideInstanceIds />
    </Device>
  </Devices>

  <!-- Device-to-slot assignments (links device to a virtual controller slot) -->
  <UserSettings>
    <Setting>
      <InstanceGuid>00000000-0000-0000-0000-000000000000</InstanceGuid>
      <InstanceName>Xbox Controller</InstanceName>
      <ProductGuid>...</ProductGuid>
      <ProductName>Xbox One Controller</ProductName>
      <MapTo>0</MapTo>
      <PadSettingChecksum>A1B2C3D4</PadSettingChecksum>
      <IsEnabled>true</IsEnabled>
      <DateCreated>2025-01-15T10:30:00</DateCreated>
      <DateUpdated>2025-01-15T10:30:00</DateUpdated>
    </Setting>
  </UserSettings>

  <!-- Mapping configurations (deduplicated by checksum) -->
  <PadSettings>
    <PadSetting>
      <PadSettingChecksum>A1B2C3D4</PadSettingChecksum>
      <!-- Button mappings -->
      <ButtonA>Button 0</ButtonA>
      <ButtonB>Button 1</ButtonB>
      <ButtonX>Button 2</ButtonX>
      <ButtonY>Button 3</ButtonY>
      <LeftShoulder>Button 4</LeftShoulder>
      <RightShoulder>Button 5</RightShoulder>
      <ButtonBack>Button 6</ButtonBack>
      <ButtonStart>Button 7</ButtonStart>
      <ButtonGuide>Button 10</ButtonGuide>
      <LeftThumbButton>Button 8</LeftThumbButton>
      <RightThumbButton>Button 9</RightThumbButton>
      <!-- D-Pad -->
      <DPad></DPad>
      <DPadUp>POV 0 Up</DPadUp>
      <DPadDown>POV 0 Down</DPadDown>
      <DPadLeft>POV 0 Left</DPadLeft>
      <DPadRight>POV 0 Right</DPadRight>
      <!-- Triggers -->
      <LeftTrigger>Axis 2</LeftTrigger>
      <RightTrigger>Axis 5</RightTrigger>
      <LeftTriggerDeadZone>0</LeftTriggerDeadZone>
      <RightTriggerDeadZone>0</RightTriggerDeadZone>
      <LeftTriggerAntiDeadZone>0</LeftTriggerAntiDeadZone>
      <RightTriggerAntiDeadZone>0</RightTriggerAntiDeadZone>
      <LeftTriggerMaxRange>100</LeftTriggerMaxRange>
      <RightTriggerMaxRange>100</RightTriggerMaxRange>
      <!-- Thumbstick axes -->
      <LeftThumbAxisX>Axis 0</LeftThumbAxisX>
      <LeftThumbAxisY>Axis 1</LeftThumbAxisY>
      <RightThumbAxisX>Axis 3</RightThumbAxisX>
      <RightThumbAxisY>Axis 4</RightThumbAxisY>
      <LeftThumbAxisXNeg></LeftThumbAxisXNeg>
      <LeftThumbAxisYNeg></LeftThumbAxisYNeg>
      <RightThumbAxisXNeg></RightThumbAxisXNeg>
      <RightThumbAxisYNeg></RightThumbAxisYNeg>
      <!-- Deadzones -->
      <LeftThumbDeadZoneX>0</LeftThumbDeadZoneX>
      <LeftThumbDeadZoneY>0</LeftThumbDeadZoneY>
      <RightThumbDeadZoneX>0</RightThumbDeadZoneX>
      <RightThumbDeadZoneY>0</RightThumbDeadZoneY>
      <LeftThumbDeadZoneShape>2</LeftThumbDeadZoneShape>
      <RightThumbDeadZoneShape>2</RightThumbDeadZoneShape>
      <LeftThumbAntiDeadZone>0</LeftThumbAntiDeadZone>
      <RightThumbAntiDeadZone>0</RightThumbAntiDeadZone>
      <LeftThumbAntiDeadZoneX>0</LeftThumbAntiDeadZoneX>
      <LeftThumbAntiDeadZoneY>0</LeftThumbAntiDeadZoneY>
      <RightThumbAntiDeadZoneX>0</RightThumbAntiDeadZoneX>
      <RightThumbAntiDeadZoneY>0</RightThumbAntiDeadZoneY>
      <LeftThumbLinear>0</LeftThumbLinear>
      <RightThumbLinear>0</RightThumbLinear>
      <!-- Sensitivity curves -->
      <LeftThumbSensitivityCurveX>0</LeftThumbSensitivityCurveX>
      <LeftThumbSensitivityCurveY>0</LeftThumbSensitivityCurveY>
      <RightThumbSensitivityCurveX>0</RightThumbSensitivityCurveX>
      <RightThumbSensitivityCurveY>0</RightThumbSensitivityCurveY>
      <LeftTriggerSensitivityCurve>0</LeftTriggerSensitivityCurve>
      <RightTriggerSensitivityCurve>0</RightTriggerSensitivityCurve>
      <!-- Max range -->
      <LeftThumbMaxRangeX>100</LeftThumbMaxRangeX>
      <LeftThumbMaxRangeY>100</LeftThumbMaxRangeY>
      <RightThumbMaxRangeX>100</RightThumbMaxRangeX>
      <RightThumbMaxRangeY>100</RightThumbMaxRangeY>
      <!-- Independent per-direction max range (null = symmetric) -->
      <LeftThumbMaxRangeXNeg>100</LeftThumbMaxRangeXNeg>
      <LeftThumbMaxRangeYNeg>100</LeftThumbMaxRangeYNeg>
      <RightThumbMaxRangeXNeg>100</RightThumbMaxRangeXNeg>
      <RightThumbMaxRangeYNeg>100</RightThumbMaxRangeYNeg>
      <!-- Center offset calibration -->
      <LeftThumbCenterOffsetX>0</LeftThumbCenterOffsetX>
      <LeftThumbCenterOffsetY>0</LeftThumbCenterOffsetY>
      <RightThumbCenterOffsetX>0</RightThumbCenterOffsetX>
      <RightThumbCenterOffsetY>0</RightThumbCenterOffsetY>
      <!-- Force feedback -->
      <ForceType>1</ForceType>
      <ForceOverall>100</ForceOverall>
      <ForceSwapMotor>0</ForceSwapMotor>
      <LeftMotorStrength>100</LeftMotorStrength>
      <RightMotorStrength>100</RightMotorStrength>
      <!-- Audio bass rumble -->
      <AudioRumbleEnabled>0</AudioRumbleEnabled>
      <AudioRumbleSensitivity>4</AudioRumbleSensitivity>
      <AudioRumbleCutoffHz>80</AudioRumbleCutoffHz>
      <AudioRumbleLeftMotor>100</AudioRumbleLeftMotor>
      <AudioRumbleRightMotor>100</AudioRumbleRightMotor>
      <!-- Axis inversion -->
      <LeftThumbAxisXInvert>0</LeftThumbAxisXInvert>
      <LeftThumbAxisYInvert>0</LeftThumbAxisYInvert>
      <RightThumbAxisXInvert>0</RightThumbAxisXInvert>
      <RightThumbAxisYInvert>0</RightThumbAxisYInvert>
      <!-- Other -->
      <AxisToButtonThreshold>50</AxisToButtonThreshold>
      <!-- Dictionary-based mappings (only present when non-empty) -->
      <ExtendedMappings>
        <Map Key="ExtendedAxis0" Value="Axis 0" />
        <Map Key="ExtendedBtn0" Value="Button 0" />
      </ExtendedMappings>
      <MidiMappings>
        <Map Key="MidiCC0" Value="Axis 0" />
        <Map Key="MidiNote0" Value="Button 0" />
      </MidiMappings>
      <KbmMappings>
        <Map Key="KbmKey41" Value="Button 0" />
        <Map Key="KbmMouseX" Value="Axis 0" />
      </KbmMappings>
      <MappingDeadZones>
        <Map><Key>ButtonA</Key><Value>30</Value></Map>
        <Map><Key>DPadUp</Key><Value>75</Value></Map>
      </MappingDeadZones>
    </PadSetting>
  </PadSettings>

  <!-- Application-level settings (single element) -->
  <AppSettings>
    <AutoStartEngine>true</AutoStartEngine>
    <MinimizeToTray>false</MinimizeToTray>
    <StartMinimized>false</StartMinimized>
    <StartAtLogin>false</StartAtLogin>
    <EnablePollingOnFocusLoss>true</EnablePollingOnFocusLoss>
    <PollingRateMs>1</PollingRateMs>
    <ThemeIndex>0</ThemeIndex>
    <Language></Language>
    <EnableAutoProfileSwitching>false</EnableAutoProfileSwitching>
    <ActiveProfileId />
    <SlotControllerTypes>
      <Type>0</Type>    <!-- VirtualControllerType enum: 0=Microsoft, 1=PlayStation (XmlEnum="Sony" on disk), 2=Extended, 3=Midi, 4=KeyboardMouse -->
      <Type>1</Type>
    </SlotControllerTypes>
    <SlotCreated>
      <Created>true</Created>
      <Created>true</Created>
      <Created>false</Created>
      <!-- ... up to 16 entries -->
    </SlotCreated>
    <SlotEnabled>
      <Enabled>true</Enabled>
      <Enabled>true</Enabled>
      <Enabled>true</Enabled>
    </SlotEnabled>
    <EnableDsuMotionServer>false</EnableDsuMotionServer>
    <DsuMotionServerPort>26760</DsuMotionServerPort>
    <EnableWebController>false</EnableWebController>
    <WebControllerPort>8080</WebControllerPort>
    <Use2DControllerView>false</Use2DControllerView>
    <EnableInputHiding>true</EnableInputHiding>
    <HidHideWhitelistPaths>
      <Path>C:\Games\emulator.exe</Path>
    </HidHideWhitelistPaths>
    <ExtendedConfigs>
      <Config SlotIndex="2">
        <Preset>Custom</Preset>
        <ThumbstickCount>2</ThumbstickCount>
        <TriggerCount>2</TriggerCount>
        <PovCount>1</PovCount>
        <ButtonCount>11</ButtonCount>
      </Config>
    </ExtendedConfigs>
    <MidiConfigs>
      <Config SlotIndex="3" Channel="1" CcCount="6" StartCc="1" NoteCount="11" StartNote="60" Velocity="127" />
    </MidiConfigs>
    <!-- Snapshot of default profile state when a named profile is active (null when default is active) -->
    <DefaultProfileSnapshot>
      <!-- Same structure as a Profile element -->
    </DefaultProfileSnapshot>
  </AppSettings>

  <!-- Macros (per-slot, PadIndex attribute identifies the slot) -->
  <Macros>
    <Macro PadIndex="0">
      <Name>Turbo A</Name>
      <IsEnabled>true</IsEnabled>
      <TriggerButtons>4096</TriggerButtons>
      <TriggerSource>OutputController</TriggerSource>
      <TriggerMode>Hold</TriggerMode>
      <ConsumeTriggerButtons>true</ConsumeTriggerButtons>
      <RepeatMode>WhileHeld</RepeatMode>
      <RepeatCount>1</RepeatCount>
      <RepeatDelayMs>50</RepeatDelayMs>
      <TriggerAxisThreshold>50</TriggerAxisThreshold>
      <Actions>
        <Action>
          <Type>Button</Type>
          <ButtonFlags>4096</ButtonFlags>
          <DurationMs>50</DurationMs>
        </Action>
      </Actions>
    </Macro>
  </Macros>

  <!-- Per-application profiles (self-contained snapshots) -->
  <Profiles>
    <Profile Id="abc123def456">
      <Name>Game Profile</Name>
      <ExecutableNames>C:\Games\game.exe|D:\Other\game2.exe</ExecutableNames>
      <Entries>
        <Entry>
          <InstanceGuid>00000000-0000-0000-0000-000000000000</InstanceGuid>
          <ProductGuid>...</ProductGuid>
          <MapTo>0</MapTo>
          <PadSettingChecksum>A1B2C3D4</PadSettingChecksum>
        </Entry>
      </Entries>
      <ProfilePadSettings>
        <PadSetting>
          <!-- Full PadSetting structure as above -->
        </PadSetting>
      </ProfilePadSettings>
      <ProfileMacros>
        <Macro PadIndex="0"><!-- ... --></Macro>
      </ProfileMacros>
      <ProfileSlotCreated>
        <Created>true</Created>
        <Created>false</Created>
      </ProfileSlotCreated>
      <ProfileSlotEnabled>
        <Enabled>true</Enabled>
        <Enabled>true</Enabled>
      </ProfileSlotEnabled>
      <ProfileSlotControllerTypes>
        <Type>0</Type>
        <Type>1</Type>
      </ProfileSlotControllerTypes>
      <ProfileExtendedConfigs>
        <ExtendedConfig SlotIndex="2"><!-- ... --></ExtendedConfig>
      </ProfileExtendedConfigs>
      <ProfileMidiConfigs>
        <MidiConfig SlotIndex="3" Channel="1" CcCount="6" StartCc="1" NoteCount="11" StartNote="60" Velocity="127" />
      </ProfileMidiConfigs>
      <EnableDsuMotionServer>false</EnableDsuMotionServer>
      <DsuMotionServerPort>26760</DsuMotionServerPort>
      <EnableWebController>false</EnableWebController>
      <WebControllerPort>8080</WebControllerPort>
    </Profile>
  </Profiles>
</PadForgeSettings>

Key Design Decisions

PadSettings deduplicated by checksum. Multiple UserSettings may reference the same PadSettingChecksum; only one copy is serialized. Keeps the file small when devices share identical mappings.
All PadSetting mapping/numeric properties are string-typed. Matches the original x360ce XML format. Empty strings represent "unmapped."
Profiles are self-contained snapshots. Each ProfileData stores its own PadSettings[], Entries[], slot topology, Extended/MIDI configs, and server settings independently. Switching profiles replaces runtime state wholesale.
Default profile snapshot preservation. When a named profile is active, AppSettings.DefaultProfileSnapshot stores the default profile's state for lossless restoration on restart. Root-level SlotCreated/SlotEnabled/SlotControllerTypes always represent the default profile; the active named profile's topology overwrites them at load time.

UserDevice

File: PadForge.Engine/Data/UserDevice.cs Namespace: PadForge.Engine.Data Implements: INotifyPropertyChanged

Represents a physical input device. Contains serializable (XML-persisted) properties and runtime-only fields for the input pipeline.

Serializable Identity Properties

Property	Type	XML Element	Description
`InstanceGuid`	`Guid`	`<InstanceGuid>`	Deterministic GUID from device path. Unique per USB port + device.
`InstanceName`	`string`	`<InstanceName>`	Instance name (e.g., "Xbox Controller"). May differ from ProductName.
`ProductGuid`	`Guid`	`<ProductGuid>`	Product GUID (PIDVID format). Fallback when instance GUIDs change (e.g., different USB port).
`ProductName`	`string`	`<ProductName>`	Product name.
`VendorId`	`ushort`	`<VendorId>`	USB Vendor ID (e.g., 1118 = Microsoft).
`ProdId`	`ushort`	`<ProdId>`	USB Product ID.
`DevRevision`	`ushort`	`<DevRevision>`	USB revision. Joystick devices only (from `SdlDeviceWrapper.ProductVersion`).
`DevicePath`	`string`	`<DevicePath>`	File system device path. Used for `InstanceGuid` generation.
`SerialNumber`	`string`	`<SerialNumber>`	Serial number (e.g., Bluetooth MAC). Empty if unavailable.

Serializable Capability Properties

Property	Type	XML Element	Description
`CapAxeCount`	`int`	`<CapAxeCount>`	Axis count.
`CapButtonCount`	`int`	`<CapButtonCount>`	Button count (gamepad-mapped count for gamepads, always 11).
`RawButtonCount`	`int`	`<RawButtonCount>`	Raw joystick button count before gamepad remapping. Higher than `CapButtonCount` on gamepads (exposes extras like DualSense touchpad click). Equals `CapButtonCount` on non-gamepads.
`CapPovCount`	`int`	`<CapPovCount>`	POV hat count.
`CapType`	`int`	`<CapType>`	`InputDeviceType` static class constants (17=Device, 18=Mouse, 19=Keyboard, 20=Joystick, 21=Gamepad, 22=Driving, 23=Flight, 24=FirstPerson, 25=Supplemental). Values match DirectInput.
`CapSubType`	`int`	`<CapSubType>`	Subtype (SDL unavailable, always 0).
`CapFlags`	`int`	`<CapFlags>`	Capability flags (SDL unavailable, always 0).
`HasGyro`	`bool`	`<HasGyro>`	Has gyroscope (e.g., DualSense, Switch Pro).
`HasAccel`	`bool`	`<HasAccel>`	Has accelerometer.
`DeviceObjects`	`DeviceObjectItem[]`	`<DeviceObjects>`	Axis/button/hat metadata. Populated in Step 1 and persisted so mapping dropdowns remain populated when devices are offline.

Serializable Metadata

Property	Type	XML Element	Description
`DateCreated`	`DateTime`	`<DateCreated>`	Record creation time (set in constructor).
`DateUpdated`	`DateTime`	`<DateUpdated>`	Last update time (set by `LoadInstance()`/`LoadCapabilities()`).
`IsEnabled`	`bool`	`<IsEnabled>`	Enabled for mapping (default: true).
`IsHidden`	`bool`	`<IsHidden>`	Hidden from UI. Remains in SettingsManager but filtered from device list.
`DisplayName`	`string`	`<DisplayName>`	User-assigned name. Overrides `InstanceName` in UI when set.
`HidHideEnabled`	`bool`	`<HidHideEnabled>`	Hide from games via HidHide driver (default: false).
`ConsumeInputEnabled`	`bool`	`<ConsumeInputEnabled>`	Suppress mapped inputs via low-level hooks (default: false). Keyboards/mice only.

Input Hiding

XML Element	Type	Default	Description
`HidHideEnabled`	`bool`	`false`	Hide device from games via HidHide
`ConsumeInputEnabled`	`bool`	`false`	Suppress mapped keyboard/mouse inputs via hooks
`ForceRawJoystickMode`	`bool`	`false`	Bypass SDL3 gamepad remapping
`HidHideInstanceIds`	`string[]`	empty	Cached HID instance IDs for offline blacklisting

Runtime-Only Properties (`[XmlIgnore]`)

Property	Type	Description
`Device`	`ISdlInputDevice`	Opened SDL device wrapper. Live handle for reads and rumble. Set in Step 1, cleared on disconnect.
`IsOnline`	`bool`	Physically connected and opened.
`InputState`	`CustomInputState`	Current state snapshot. Written by background thread (Step 2), read by UI. Atomic reference assignment.
`InputUpdates`	`CustomInputUpdate[]`	Buffered updates since last poll cycle.
`OldInputState`	`CustomInputState`	Previous state for change detection.
`OrgInputState`	`CustomInputState`	State at recording start (for recorder delta detection).
`AxeMask`	`int`	Bitmask of present axes (bit N = axis N exists).
`ActuatorMask`	`int`	Bitmask of FFB actuator axes.
`ActuatorCount`	`int`	FFB actuator axis count.
`SliderMask`	`int`	Bitmask of present sliders.
`DeviceEffects`	`DeviceEffectItem[]`	Rumble capability metadata.
`ForceFeedbackState`	`ForceFeedbackState`	FFB/haptic state tracker. Created for devices with rumble or haptic.

Convenience Properties (`[XmlIgnore]`)

Property	Type	Description
`IsMouse`	`bool`	`CapType == InputDeviceType.Mouse`
`IsKeyboard`	`bool`	`CapType == InputDeviceType.Keyboard`
`HasForceFeedback`	`bool`	`ActuatorCount > 0 \|\| Device.HasRumble \|\| Device.HasHaptic`
`ResolvedName`	`string`	`DisplayName` > `InstanceName` > `ProductName` > "(Unknown Device)"
`StatusText`	`string`	"Disabled", "Online", or "Offline"

Loading Methods

public void LoadFromSdlDevice(SdlDeviceWrapper wrapper)

Entry point for joystick/gamepad devices. Calls LoadFromDevice() and sets DevRevision.

public void LoadFromKeyboardDevice(SdlKeyboardWrapper wrapper)
public void LoadFromMouseDevice(SdlMouseWrapper wrapper)

Entry points for keyboard and mouse. Call LoadFromDevice().

private void LoadFromDevice(ISdlInputDevice wrapper)

Shared logic:

LoadInstance(). Identity (InstanceGuid, Name, ProductGuid)
LoadCapabilities(). Axes, buttons, hats, type
RawButtonCount = Math.Max(wrapper.RawButtonCount, wrapper.NumButtons)
Sensor flags (HasGyro, HasAccel)
VendorId, ProdId, DevicePath, SerialNumber
Build DeviceObjects and DeviceEffects
Compute AxeMask, ActuatorMask, SliderMask
Create ForceFeedbackState if rumble/haptic supported
Store wrapper as Device

public void ClearRuntimeState()

Called on disconnect. Nulls runtime fields, sets IsOnline = false, raises NotifyStateChanged().

UserSetting

File: PadForge.Engine/Data/UserSetting.cs Namespace: PadForge.Engine.Data Implements: INotifyPropertyChanged

Links a physical device (InstanceGuid) to a virtual controller slot (MapTo) and a mapping configuration (PadSettingChecksum). One UserSetting per device-to-slot assignment.

Serializable Properties

Property	Type	XML Element	Default	Description
`InstanceGuid`	`Guid`	`<InstanceGuid>`	`Guid.Empty`	Must match `UserDevice.InstanceGuid`.
`InstanceName`	`string`	`<InstanceName>`	`""`	Name at creation time. Shown when device is offline.
`ProductGuid`	`Guid`	`<ProductGuid>`	`Guid.Empty`	Fallback matching when instance GUIDs change (e.g., different USB port).
`ProductName`	`string`	`<ProductName>`	`""`	Product name.
`MapTo`	`int`	`<MapTo>`	`-1`	Slot index (0–15). -1 = unmapped. Fires `PropertyChanged`.
`PadSettingChecksum`	`string`	`<PadSettingChecksum>`	`""`	Links to a PadSetting record. Multiple UserSettings can share one checksum.
`IsEnabled`	`bool`	`<IsEnabled>`	`true`	Active mapping. Disabled mappings are skipped.
`DateCreated`	`DateTime`	`<DateCreated>`	`DateTime.Now`	Creation time.
`DateUpdated`	`DateTime`	`<DateUpdated>`	`DateTime.Now`	Last modified time.

Runtime-Only Properties (`[XmlIgnore]`)

Property	Type	Description
`OutputState`	`Gamepad`	Mapped output from Step 3. Written by background thread, read by Step 4 and UI.
`RawMappedState`	`Gamepad`	Axis-selected and Y-negated but before deadzone/anti-deadzone/linear/max range. Used by UI preview to avoid double-processing.
`ExtendedRawOutputState`	`ExtendedRawState`	Raw Extended (HIDMaestro custom-HID) output. Populated only for Extended slots whose layout is in the custom (non-gamepad) shape (`SlotExtendedIsCustom == true`).
`MidiRawOutputState`	`MidiRawState`	Raw MIDI output. Populated only for MIDI slots.
`KbmRawOutputState`	`KbmRawState`	Raw KB+M output. Populated only for KeyboardMouse slots.
`_cachedPadSetting`	`PadSetting` (internal)	Cached PadSetting. Set during load, accessed via `GetPadSetting()`/`SetPadSetting()`.

Multi-Slot Assignment Design

Multiple UserSettings can share the same InstanceGuid with different MapTo values, letting one physical device feed multiple virtual controllers. Each assignment has an independent PadSetting (cloned during load to prevent shared-mutation bugs).

Example: DualSense assigned to slot 0 and slot 2 produces two entries:

{ InstanceGuid = "abc...", MapTo = 0, PadSettingChecksum = "X1Y2Z3A4" }
{ InstanceGuid = "abc...", MapTo = 2, PadSettingChecksum = "B5C6D7E8" }

PadSetting

File: PadForge.Engine/Data/PadSetting.cs Namespace: PadForge.Engine.Data Partial class

Complete mapping configuration for a device-to-slot assignment. All mapping properties are string-typed descriptors consumed by InputManager Step 3.

Checksum System

[XmlElement]
public string PadSettingChecksum { get; set; } = string.Empty;

8-character uppercase hex string from an MD5 hash of all mapping/setting properties. Serves three purposes:

Linking: UserSettings reference PadSettings by checksum (not index or GUID)
Deduplication: On save, identical checksums serialize only once
Change detection: Any property change produces a new checksum

ComputeChecksum(). What Is Included

ComputeChecksum() builds a pipe-delimited string from all behavior-affecting properties in fixed order:

Button mappings (11): ButtonA, ButtonB, ButtonX, ButtonY, LeftShoulder, RightShoulder, ButtonBack, ButtonStart, ButtonGuide, LeftThumbButton, RightThumbButton
D-Pad (5): DPad, DPadUp, DPadDown, DPadLeft, DPadRight
Triggers (8): LeftTrigger, RightTrigger, LeftTriggerDeadZone, RightTriggerDeadZone, LeftTriggerAntiDeadZone, RightTriggerAntiDeadZone, LeftTriggerMaxRange, RightTriggerMaxRange
Thumbstick axes (8): LeftThumbAxisX, LeftThumbAxisY, RightThumbAxisX, RightThumbAxisY, LeftThumbAxisXNeg, LeftThumbAxisYNeg, RightThumbAxisXNeg, RightThumbAxisYNeg
Deadzones (32): LeftThumbDeadZoneX/Y, RightThumbDeadZoneX/Y, LeftThumbDeadZoneShape, RightThumbDeadZoneShape, LeftThumbAntiDeadZone, RightThumbAntiDeadZone, LeftThumbAntiDeadZoneX/Y, RightThumbAntiDeadZoneX/Y, LeftThumbLinear, RightThumbLinear, all 6 sensitivity curves, all 8 max range properties, all 4 center offset properties
Force feedback (5): ForceType, ForceOverall, ForceSwapMotor, LeftMotorStrength, RightMotorStrength
Audio bass rumble (5): AudioRumbleEnabled, AudioRumbleSensitivity, AudioRumbleCutoffHz, AudioRumbleLeftMotor, AudioRumbleRightMotor
Axis inversion (4): LeftThumbAxisXInvert, LeftThumbAxisYInvert, RightThumbAxisXInvert, RightThumbAxisYInvert
Threshold (1): AxisToButtonThreshold
Extended custom mappings. Dictionary entries sorted by key (StringComparer.Ordinal), formatted as key=value|
MIDI custom mappings. Same sorted key=value format
KBM custom mappings. Same sorted key=value format
Mapping deadzones. Same sorted key=value format (from MappingDeadZones dictionary), prefixed with MDZ: in the checksum string

The string is UTF-8 encoded, hashed with MD5.HashData(), and the first 4 bytes returned as 8-char uppercase hex:

byte[] hash = MD5.HashData(Encoding.UTF8.GetBytes(sb.ToString()));
return BitConverter.ToString(hash, 0, 4).Replace("-", "").ToUpperInvariant();

Not included in the checksum: PadSettingChecksum itself.

Deduplication During Save

During SaveToFile(), PadSettings are deduplicated by checksum via HashSet<string>:

var seen = new HashSet<string>();
var uniquePadSettings = new List<PadSetting>();
foreach (var us in UserSettings.Items)
{
    var ps = us.GetPadSetting();
    if (ps != null && seen.Add(ps.PadSettingChecksum))
        uniquePadSettings.Add(ps);
}
data.PadSettings = uniquePadSettings.ToArray();

The XML stores N unique PadSettings where N <= UserSettings count. Multiple <Setting> elements can reference the same <PadSettingChecksum>.

Descriptor Format

All mapping properties use string descriptors parsed by Step 3:

Format	Example	Description
`"Button N"`	`"Button 0"`	Button at index N
`"Axis N"`	`"Axis 1"`	Full-range axis at index N
`"IAxis N"`	`"IAxis 1"`	Inverted axis
`"HAxis N"`	`"HAxis 2"`	Half-axis, 0–100% range
`"IHAxis N"`	`"IHAxis 2"`	Inverted half-axis
`"Slider N"`	`"Slider 0"`	Slider at index N
`"POV N Dir"`	`"POV 0 Up"`	POV hat at index N, direction: Up, Down, Left, Right, UpRight, UpLeft, DownRight, DownLeft
`""`	`""`	Unmapped (empty string)

Prefixes:

I (Invert): Flips axis direction. Applied by recorder auto-inversion.
H (Half): Maps full-range axis to 0–100% (triggers and unidirectional mappings).

Complete PadSetting Property Reference

Button Mapping Properties

All [XmlElement], all string, all default to "":

Property	Description
`ButtonA`	A / Cross button
`ButtonB`	B / Circle button
`ButtonX`	X / Square button
`ButtonY`	Y / Triangle button
`LeftShoulder`	LB / L1
`RightShoulder`	RB / R1
`ButtonBack`	Back / Share / Select
`ButtonStart`	Start / Options
`ButtonGuide`	Guide / PS button
`LeftThumbButton`	LS / L3 (left stick press)
`RightThumbButton`	RS / R3 (right stick press)

D-Pad Mapping Properties

Property	Default	Description
`DPad`	`""`	Combined D-Pad. `"POV 0"` auto-extracts all four directions in Step 3.
`DPadUp`	`""`	D-Pad up override
`DPadDown`	`""`	D-Pad down override
`DPadLeft`	`""`	D-Pad left override
`DPadRight`	`""`	D-Pad right override

Individual DPadUp/Down/Left/Right override the combined DPad property.

Trigger Mapping Properties

Property	Default	Description
`LeftTrigger`	`""`	Left trigger source mapping
`RightTrigger`	`""`	Right trigger source mapping
`LeftTriggerDeadZone`	`"0"`	Deadzone (0–100%). Below threshold treated as zero.
`RightTriggerDeadZone`	`"0"`	Deadzone (0–100%).
`LeftTriggerAntiDeadZone`	`"0"`	Anti-deadzone (0–100%). Offsets output minimum past game's built-in deadzone.
`RightTriggerAntiDeadZone`	`"0"`	Anti-deadzone (0–100%).
`LeftTriggerMaxRange`	`"100"`	Max range (1–100%). Full press maps to this ceiling.
`RightTriggerMaxRange`	`"100"`	Max range (1–100%).

Thumbstick Axis Mapping Properties

Property	Default	Description
`LeftThumbAxisX`	`""`	Left stick X positive direction
`LeftThumbAxisY`	`""`	Left stick Y positive direction
`RightThumbAxisX`	`""`	Right stick X positive direction
`RightThumbAxisY`	`""`	Right stick Y positive direction
`LeftThumbAxisXNeg`	`""`	Left stick X negative direction (for button-to-axis mappings)
`LeftThumbAxisYNeg`	`""`	Left stick Y negative direction
`RightThumbAxisXNeg`	`""`	Right stick X negative direction
`RightThumbAxisYNeg`	`""`	Right stick Y negative direction

"Neg" variants map separate physical inputs to opposite directions of one virtual axis (e.g., two buttons to left/right stick).

Deadzone / Response Curve Properties

Property	Default	Description
`LeftThumbDeadZoneX`	`"0"`	Left stick DZ X (0–100%)
`LeftThumbDeadZoneY`	`"0"`	Left stick DZ Y (0–100%)
`RightThumbDeadZoneX`	`"0"`	Right stick DZ X (0–100%)
`RightThumbDeadZoneY`	`"0"`	Right stick DZ Y (0–100%)
`LeftThumbAntiDeadZone`	`"0"`	Legacy unified ADZ (migrated to per-axis on load)
`RightThumbAntiDeadZone`	`"0"`	Legacy unified ADZ
`LeftThumbAntiDeadZoneX`	`"0"`	Left stick ADZ X (0–100%)
`LeftThumbAntiDeadZoneY`	`"0"`	Left stick ADZ Y (0–100%)
`RightThumbAntiDeadZoneX`	`"0"`	Right stick ADZ X (0–100%)
`RightThumbAntiDeadZoneY`	`"0"`	Right stick ADZ Y (0–100%)
`LeftThumbLinear`	`"0"`	Left stick linearity (0–100). 0 = default curve, 100 = fully linear.
`RightThumbLinear`	`"0"`	Right stick linearity (0–100).

Deadzone Shape

Property	Default	Description
`LeftThumbDeadZoneShape`	`"2"`	Left stick DZ shape (see enum below). Default 2 = ScaledRadial.
`RightThumbDeadZoneShape`	`"2"`	Right stick DZ shape.

DeadZoneShape enum (PadForge.Engine/Data/DeadZoneShape.cs):

Value	Name	Description
0	`Axial`	Per-axis (square). Legacy.
1	`Radial`	Circular magnitude, no rescaling.
2	`ScaledRadial`	Circular magnitude with rescaling (industry standard). Default.
3	`SlopedAxial`	DZ grows on one axis as the other increases.
4	`SlopedScaledAxial`	Sloped thresholds with rescaling.
5	`Hybrid`	ScaledRadial then SlopedScaledAxial.

Sensitivity Curve Properties

Property	Default	Description
`LeftThumbSensitivityCurveX`	`"0"`	Left stick X curve. Format: `"0,0;0.5,0.2;1,1"` (semicolon-separated control points). `"0"` or `"0,0;1,1"` = linear.
`LeftThumbSensitivityCurveY`	`"0"`	Left stick Y curve.
`RightThumbSensitivityCurveX`	`"0"`	Right stick X curve.
`RightThumbSensitivityCurveY`	`"0"`	Right stick Y curve.
`LeftTriggerSensitivityCurve`	`"0"`	Left trigger curve.
`RightTriggerSensitivityCurve`	`"0"`	Right trigger curve.

Stick Calibration

Property	Default	Description
`LeftThumbCenterOffsetX`	`"0"`	Left stick X center offset (-100–100%). Subtracted before DZ processing.
`LeftThumbCenterOffsetY`	`"0"`	Left stick Y center offset
`RightThumbCenterOffsetX`	`"0"`	Right stick X center offset
`RightThumbCenterOffsetY`	`"0"`	Right stick Y center offset
`LeftThumbMaxRangeX`	`"100"`	Left stick X max range (1–100%). Full deflection maps to this ceiling.
`LeftThumbMaxRangeY`	`"100"`	Left stick Y max range
`RightThumbMaxRangeX`	`"100"`	Right stick X max range
`RightThumbMaxRangeY`	`"100"`	Right stick Y max range
`LeftThumbMaxRangeXNeg`	(null)	Left stick X negative max range (1–100%). Null = symmetric.
`LeftThumbMaxRangeYNeg`	(null)	Left stick Y negative max range. Null = symmetric.
`RightThumbMaxRangeXNeg`	(null)	Right stick X negative max range. Null = symmetric.
`RightThumbMaxRangeYNeg`	(null)	Right stick Y negative max range. Null = symmetric.

Force Feedback Properties

Property	Default	Description
`ForceType`	`"1"`	0 = Off, 1 = SDL Rumble.
`ForceOverall`	`"100"`	Overall gain (0–100%). Multiplier for both motors.
`ForceSwapMotor`	`"0"`	Swap left/right motors. 0 = no, 1 = yes.
`LeftMotorStrength`	`"100"`	Left (low-freq) motor (0–100%).
`RightMotorStrength`	`"100"`	Right (high-freq) motor (0–100%).

Audio Rumble Properties

Property	Default	Description
`AudioRumbleEnabled`	`"0"`	Audio bass rumble. 0 = off, 1 = on.
`AudioRumbleSensitivity`	`"4"`	Bass sensitivity (higher = more reactive).
`AudioRumbleCutoffHz`	`"80"`	Low-pass cutoff (Hz) for bass extraction.
`AudioRumbleLeftMotor`	`"100"`	Left motor for audio rumble (0–100%).
`AudioRumbleRightMotor`	`"100"`	Right motor for audio rumble (0–100%).

Axis Inversion and Threshold

Property	Default	Description
`LeftThumbAxisXInvert`	`"0"`	Invert left stick X. 0 or 1.
`LeftThumbAxisYInvert`	`"0"`	Invert left stick Y.
`RightThumbAxisXInvert`	`"0"`	Invert right stick X.
`RightThumbAxisYInvert`	`"0"`	Invert right stick Y.
`AxisToButtonThreshold`	`"50"`	Axis-to-button threshold (0–100%). Axis must exceed this to register as pressed.

Dictionary-Based Mapping Systems

Extended, MIDI, and KB+M use dictionary-based storage for arbitrary key counts. All three share ExtendedMappingEntry as the serialization type and follow the same pattern: in-memory Dictionary<string, string> backed by a serializable ExtendedMappingEntry[]. Dictionary is lazily populated on first access and flushed to the array before serialization.

Extended Custom Mappings

Extended (HIDMaestro custom-HID) slot with arbitrary axis/button/POV counts. Keys:

ExtendedAxis0, ExtendedAxis0Neg. Axis mappings (positive and negative directions)
ExtendedBtn0, ExtendedBtn5. Button mappings
ExtendedPov0Up, ExtendedPov0Down, ExtendedPov0Left, ExtendedPov0Right. POV directions
ExtendedStick{N}DzX, ExtendedStick{N}DzY, ExtendedStick{N}AdzX, etc.. Per-stick deadzone/calibration settings

[XmlArray("ExtendedMappings")]
[XmlArrayItem("Map")]
public ExtendedMappingEntry[] ExtendedMappingEntries { get; set; }

MIDI Mappings

MIDI output. Keys:

MidiCC0, MidiCC0Neg. CC (Control Change) mappings for axes
MidiNote0, MidiNote5. Note mappings for buttons

[XmlArray("MidiMappings")]
[XmlArrayItem("Map")]
public ExtendedMappingEntry[] MidiMappingEntries { get; set; }

KBM (Keyboard+Mouse) Mappings

Keyboard+Mouse output. Keys:

KbmKey{VK:X2}. Keyboard key by VK hex (e.g., KbmKey41 = VK_A)
KbmMouseX/XNeg/Y/YNeg. Mouse movement axes
KbmMBtn0–KbmMBtn4. Mouse buttons (LMB, RMB, MMB, X1, X2)
KbmScroll, KbmScrollNeg. Scroll wheel

[XmlArray("KbmMappings")]
[XmlArrayItem("Map")]
public ExtendedMappingEntry[] KbmMappingEntries { get; set; }

Mapping Deadzones

Per-mapping deadzone overrides. Each entry sets the deadzone threshold for a specific target mapping, overriding the global AxisToButtonThreshold. Keys are target setting names from any VC type:

ButtonA, DPadUp, LeftShoulder. Standard gamepad mappings
ExtendedBtn0, ExtendedPov0Up. Extended mappings
KbmKey41, KbmMBtn0. KB+M mappings
MidiNote0. MIDI mappings

Values are deadzone percentages 0–100. Entries at the default value (50) are not stored. Only non-default overrides are serialized.

<MappingDeadZones>
  <Map><Key>ButtonA</Key><Value>30</Value></Map>
  <Map><Key>DPadUp</Key><Value>75</Value></Map>
</MappingDeadZones>

[XmlArray("MappingDeadZones")]
[XmlArrayItem("Map")]
public ExtendedMappingEntry[] MappingDeadZoneEntries { get; set; }

Method	Description
`int GetMappingDeadZone(string key)`	Get deadzone for a target mapping. Returns 50 (default) if not found.
`void SetMappingDeadZone(string key, int value)`	Set deadzone for a target mapping. Values equal to 50 remove the entry.
`void FlushMappingDeadZones()`	Flush dictionary to the serializable array. Must be called before serialization.

Lazily initialized from the array via EnsureMappingDeadZoneDict() (double-checked locking). JSON key: __MappingDeadZones.

Shared Entry Type

public class ExtendedMappingEntry
{
    [XmlAttribute] public string Key { get; set; } = "";
    [XmlAttribute] public string Value { get; set; } = "";
}

Dictionary Methods (same pattern for all three)

Method	Description
`string Get{Type}Mapping(string key)`	Get descriptor by key. Returns empty string if not found.
`void Set{Type}Mapping(string key, string value)`	Set descriptor by key. Empty/null values remove the entry.
`void Flush{Type}Mappings()`	Flush dictionary to the serializable array. Must be called before serialization.

Where {Type} is Extended, Midi, or Kbm. Lazily initialized from the array via Ensure{Type}Dict() (double-checked locking).

CopyablePropertyNames

Static array defining which properties participate in CopyFrom(), ToJson(), and FromJson(). Includes all user-facing configuration; excludes identity and metadata.

Complete list (79 properties):

Category	Properties
Buttons (11)	`ButtonA`, `ButtonB`, `ButtonX`, `ButtonY`, `LeftShoulder`, `RightShoulder`, `ButtonBack`, `ButtonStart`, `ButtonGuide`, `LeftThumbButton`, `RightThumbButton`
D-Pad (5)	`DPad`, `DPadUp`, `DPadDown`, `DPadLeft`, `DPadRight`
Triggers (8)	`LeftTrigger`, `RightTrigger`, `LeftTriggerDeadZone`, `RightTriggerDeadZone`, `LeftTriggerAntiDeadZone`, `RightTriggerAntiDeadZone`, `LeftTriggerMaxRange`, `RightTriggerMaxRange`
Stick axes (8)	`LeftThumbAxisX`, `LeftThumbAxisY`, `RightThumbAxisX`, `RightThumbAxisY`, `LeftThumbAxisXNeg`, `LeftThumbAxisYNeg`, `RightThumbAxisXNeg`, `RightThumbAxisYNeg`
Deadzones (14)	`LeftThumbDeadZoneX`, `LeftThumbDeadZoneY`, `RightThumbDeadZoneX`, `RightThumbDeadZoneY`, `LeftThumbDeadZoneShape`, `RightThumbDeadZoneShape`, `LeftThumbAntiDeadZone`, `RightThumbAntiDeadZone`, `LeftThumbAntiDeadZoneX`, `LeftThumbAntiDeadZoneY`, `RightThumbAntiDeadZoneX`, `RightThumbAntiDeadZoneY`, `LeftThumbLinear`, `RightThumbLinear`
Sensitivity curves (6)	`LeftThumbSensitivityCurveX`, `LeftThumbSensitivityCurveY`, `RightThumbSensitivityCurveX`, `RightThumbSensitivityCurveY`, `LeftTriggerSensitivityCurve`, `RightTriggerSensitivityCurve`
Max range (8)	`LeftThumbMaxRangeX`, `LeftThumbMaxRangeY`, `RightThumbMaxRangeX`, `RightThumbMaxRangeY`, `LeftThumbMaxRangeXNeg`, `LeftThumbMaxRangeYNeg`, `RightThumbMaxRangeXNeg`, `RightThumbMaxRangeYNeg`
Center offset (4)	`LeftThumbCenterOffsetX`, `LeftThumbCenterOffsetY`, `RightThumbCenterOffsetX`, `RightThumbCenterOffsetY`
Force feedback (5)	`ForceType`, `ForceOverall`, `ForceSwapMotor`, `LeftMotorStrength`, `RightMotorStrength`
Audio bass rumble (5)	`AudioRumbleEnabled`, `AudioRumbleSensitivity`, `AudioRumbleCutoffHz`, `AudioRumbleLeftMotor`, `AudioRumbleRightMotor`
Axis inversion (4)	`LeftThumbAxisXInvert`, `LeftThumbAxisYInvert`, `RightThumbAxisXInvert`, `RightThumbAxisYInvert`
Threshold (1)	`AxisToButtonThreshold`

Excluded:

PadSettingChecksum. Recomputed after copy
ExtendedMappingEntries, MidiMappingEntries, KbmMappingEntries, MappingDeadZoneEntries. Deep-copied separately in CopyFrom() and serialized separately in ToJson()/FromJson()

Usage:

CopyFrom(). Copies all properties via reflection, then deep-copies mapping arrays
ToJson(). Serializes properties + __ExtendedMappings/__MidiMappings/__KbmMappings/__MappingDeadZones + layout metadata (__OutputType, __IsCustomExtended) for clipboard
FromJson(). Deserializes JSON, extracts layout metadata for cross-layout paste

Utility Methods

Method	Signature	Description
`CloneDeep`	`PadSetting CloneDeep()`	Deep clone via `CopyFrom(this)`, plus `PadSettingChecksum`.
`CopyFrom`	`void CopyFrom(PadSetting source)`	Reflection copy of all `CopyablePropertyNames`. Deep-copies mapping arrays, invalidates cached dicts.
`CopyFromTranslated`	`void CopyFromTranslated(PadSetting source, ...)`	Cross-layout copy with positional translation (see Cross-Layout Mapping Translation).
`ToJson`	`string ToJson(VirtualControllerType, bool)`	JSON for clipboard. Includes layout metadata.
`FromJson`	`static PadSetting FromJson(string json, out ...)`	Deserialize JSON. Returns null on invalid input. Extracts layout metadata.
`ClearMappingDescriptors`	`void ClearMappingDescriptors()`	Clears all mapping descriptors; preserves DZ, FFB, and other config.
`GetAllMappingDescriptors`	`List<string> GetAllMappingDescriptors()`	All non-empty descriptors from standard, Extended, and MIDI.
`HasAnyMapping`	`bool` (property)	True if any mapping property has a non-empty descriptor.

Migration Methods

Method	Description
`MigrateAntiDeadZones()`	Migrates unified ADZ to per-axis X/Y. Only runs when per-axis is empty/zero and unified is non-zero. Idempotent.
`MigrateMaxRangeDirections()`	Copies symmetric max range to per-direction properties when negative-direction is null/empty.

AppSettingsData

File: PadForge.App/Services/SettingsService.cs (inner class)

Application-level settings stored as a single <AppSettings> element.

Complete Property Reference

Property	Type	XML Serialization	Default	Description
`AutoStartEngine`	`bool`	`[XmlElement]`	`true`	Auto-start engine on launch
`MinimizeToTray`	`bool`	`[XmlElement]`	`false`	Minimize to tray instead of taskbar
`StartMinimized`	`bool`	`[XmlElement]`	`false`	Start minimized
`StartAtLogin`	`bool`	`[XmlElement]`	`false`	Register as startup app
`EnablePollingOnFocusLoss`	`bool`	`[XmlElement]`	`true`	Continue polling on focus loss
`PollingRateMs`	`int`	`[XmlElement]`	`1`	Polling interval in ms (~1000 Hz at 1 ms)
`ThemeIndex`	`int`	`[XmlElement]`	`0`	UI theme index
`Language`	`string`	`[XmlElement]`	`""`	Language code ("en", "fr", "ja"). Empty = system default.
`EnableAutoProfileSwitching`	`bool`	`[XmlElement]`	`false`	Foreground-based auto profile switching
`ActiveProfileId`	`string`	`[XmlElement]`	`null`	Active named profile ID (null = default)
`SlotControllerTypes`	`int[]`	`[XmlArray][XmlArrayItem("Type")]`	`null`	Per-slot `VirtualControllerType` (0=Microsoft, 1=PlayStation, 2=Extended, 3=Midi, 4=KeyboardMouse). Numeric values preserved from v2 so existing files load.
`SlotCreated`	`bool[]`	`[XmlArray][XmlArrayItem("Created")]`	`null`	Which slots are created
`SlotEnabled`	`bool[]`	`[XmlArray][XmlArrayItem("Enabled")]`	`null`	Which slots are enabled
`EnableDsuMotionServer`	`bool`	`[XmlElement]`	`false`	DSU/Cemuhook motion server
`DsuMotionServerPort`	`int`	`[XmlElement]`	`26760`	DSU server port
`EnableWebController`	`bool`	`[XmlElement]`	`false`	Embedded web controller server
`WebControllerPort`	`int`	`[XmlElement]`	`8080`	Web controller port
`Use2DControllerView`	`bool`	`[XmlElement]`	`false`	2D controller view (instead of 3D)
`EnableInputHiding`	`bool`	`[XmlElement]`	`true`	Master switch for HidHide + hooks. When false, no hiding occurs.
`HidHideWhitelistPaths`	`string[]`	`[XmlArray][XmlArrayItem("Path")]`	`null`	HidHide whitelisted app paths. Null = empty.
`ExtendedConfigs`	`ExtendedSlotConfigData[]`	`[XmlArray][XmlArrayItem("Config")]`	`null`	Per-slot Extended config (preset, axis/trigger/POV/button counts, HIDMaestro OEM/product overrides)
`MidiConfigs`	`MidiSlotConfigData[]`	`[XmlArray][XmlArrayItem("Config")]`	`null`	Per-slot MIDI config (channel, CC/note ranges, velocity)
`DefaultProfileSnapshot`	`ProfileData`	`[XmlElement]`	`null`	Default profile snapshot. Populated only when a named profile is active. See Default Profile Snapshot.

Default Profile Snapshot Mechanism

Root-level SlotCreated/SlotEnabled/SlotControllerTypes/ExtendedConfigs/MidiConfigs must always represent the default profile. Without this, switching back to default would lose its topology.

Save (BuildAppSettings()):

Default active (ActiveProfileId null): slot arrays from live state, DefaultProfileSnapshot = null.
Named profile active: slot arrays from SettingsManager.PendingDefaultSnapshot, DefaultProfileSnapshot set to that snapshot.

Load (LoadProfiles()):

Named profile was active at shutdown: PendingDefaultSnapshot restored from appSettings.DefaultProfileSnapshot. Named profile's topology applied over default's loaded values.
InputService.Start() uses PendingDefaultSnapshot to initialize _defaultProfileSnapshot.

ExtendedSlotConfigData

public class ExtendedSlotConfigData
{
    [XmlAttribute] public int SlotIndex { get; set; }
    [XmlAttribute] public bool Customize { get; set; }
    [XmlAttribute] public int ThumbstickCount { get; set; } = 2;
    [XmlAttribute] public int TriggerCount { get; set; } = 2;
    [XmlAttribute] public int PovCount { get; set; } = 1;
    [XmlAttribute] public int ButtonCount { get; set; } = 11;
    [XmlAttribute] public bool OemNameOverride { get; set; }
    [XmlAttribute] public string ProductString { get; set; } = string.Empty;
}

The v2 Preset attribute (an ExtendedPreset enum: Xbox360 / DualShock4 / Custom) was dropped in commit d57a725. Older v2 PadForge.xml files still containing the attribute deserialize cleanly — the unknown attribute is ignored — and the slot picks up v3 defaults from the field initializers above.

MidiSlotConfigData

File: PadForge.App/ViewModels/MidiSlotConfig.cs

Per-slot MIDI configuration DTO. Stored in <MidiConfigs>.

public class MidiSlotConfigData
{
    [XmlAttribute] public int SlotIndex { get; set; }
    [XmlAttribute] public int Channel { get; set; } = 1;
    [XmlAttribute] public int CcCount { get; set; } = 6;
    [XmlAttribute] public int StartCc { get; set; } = 1;
    [XmlAttribute] public int NoteCount { get; set; } = 11;
    [XmlAttribute] public int StartNote { get; set; } = 60;
    [XmlAttribute] public byte Velocity { get; set; } = 127;
}

Property	Default	Description
`SlotIndex`	.	Zero-based pad slot index
`Channel`	`1`	MIDI channel (1–16)
`CcCount`	`6`	CC count (maps to axes)
`StartCc`	`1`	First CC number
`NoteCount`	`11`	Note count (maps to buttons)
`StartNote`	`60`	First note (Middle C)
`Velocity`	`127`	Note-on velocity (0–127)

MacroData and ActionData

MacroData

Macro configuration DTO. Stored per pad slot via PadIndex attribute.

public class MacroData
{
    [XmlAttribute] public int PadIndex { get; set; }
    [XmlElement] public string Name { get; set; } = "New Macro";
    [XmlElement] public bool IsEnabled { get; set; } = true;
    [XmlElement] public ushort TriggerButtons { get; set; }
    [XmlElement] public string TriggerDeviceGuid { get; set; }
    [XmlElement] public string TriggerRawButtons { get; set; }
    [XmlElement] public MacroTriggerSource TriggerSource { get; set; }
    [XmlElement] public MacroTriggerMode TriggerMode { get; set; }
    [XmlElement] public bool ConsumeTriggerButtons { get; set; } = true;
    [XmlElement] public MacroRepeatMode RepeatMode { get; set; }
    [XmlElement] public int RepeatCount { get; set; } = 1;
    [XmlElement] public int RepeatDelayMs { get; set; } = 100;
    [XmlElement] public string TriggerCustomButtons { get; set; }

    [XmlElement] public string TriggerAxisTargets { get; set; }
    [XmlElement] public int TriggerAxisThreshold { get; set; } = 50;

    [XmlArray("TriggerPovs")]
    [XmlArrayItem("Pov")]
    public string[] TriggerPovs { get; set; }

    [XmlArray("Actions")]
    [XmlArrayItem("Action")]
    public ActionData[] Actions { get; set; }
}

Property	Type	Description
`PadIndex`	`int` (attribute)	Which pad slot this macro belongs to
`TriggerButtons`	`ushort`	Xbox button bitmask for trigger combo
`TriggerDeviceGuid`	`string`	Device GUID for raw trigger (N format, no hyphens)
`TriggerRawButtons`	`string`	Comma-separated raw button indices (e.g., "13,14")
`TriggerSource`	`MacroTriggerSource`	`InputDevice` or `OutputController`
`TriggerMode`	`MacroTriggerMode`	`OnPress`, `OnRelease`, `WhileHeld`, or `Always`
`ConsumeTriggerButtons`	`bool`	Remove trigger buttons from output
`RepeatMode`	`MacroRepeatMode`	`Once`, `FixedCount`, or `UntilRelease`
`TriggerCustomButtons`	`string`	Hex-encoded Extended button words (e.g., "00000003,...")
`TriggerAxisTargets`	`string`	Comma-separated axis names (e.g., "LeftStickX,LeftTrigger")
`TriggerAxisThreshold`	`int`	Axis threshold (1–100%, default 50). Normalized value must exceed to match.
`TriggerPovs`	`string[]`	POV directions as `"povIndex:centidegrees"` (e.g., "0:0" = POV 0 Up).

ActionData

public class ActionData
{
    [XmlElement] public MacroActionType Type { get; set; }
    [XmlElement] public ushort ButtonFlags { get; set; }
    [XmlElement] public string CustomButtons { get; set; }
    [XmlElement] public int KeyCode { get; set; }
    [XmlElement] public string KeyString { get; set; }
    [XmlElement] public int DurationMs { get; set; } = 50;
    [XmlElement] public short AxisValue { get; set; }
    [XmlElement] public MacroAxisTarget AxisTarget { get; set; }
    [XmlElement] public MacroAxisSource AxisSource { get; set; }
    [XmlElement] public string SourceDeviceGuid { get; set; }
    [XmlElement] public int SourceDeviceAxisIndex { get; set; }
    [XmlElement] public string ProcessName { get; set; }
    [XmlElement] public int VolumeLimit { get; set; } = 100;
    [XmlElement] public float MouseSensitivity { get; set; } = 10f;
    [XmlElement] public MacroMouseButton MouseButton { get; set; }
    [XmlElement] public bool InvertAxis { get; set; }
    [XmlElement] public bool ShowVolumeOsd { get; set; } = true;
}

Property	Type	Default	Description
`Type`	`MacroActionType`	.	`ButtonPress`, `ButtonRelease`, `KeyPress`, `KeyRelease`, `Delay`, `AxisSet`, `SystemVolume`, `AppVolume`, `MouseMove`, `MouseButtonPress`, `MouseButtonRelease`, `MouseScroll`
`ButtonFlags`	`ushort`	`0`	Xbox button flags to press/release
`CustomButtons`	`string`	`null`	Hex-encoded Extended button words
`KeyCode`	`int`	`0`	Virtual key code (single key)
`KeyString`	`string`	`null`	Multi-key combo as `{Key1}{Key2}...` (e.g., `{LShiftKey}{A}`). Overrides `KeyCode`.
`DurationMs`	`int`	`50`	Hold duration in ms
`AxisValue`	`short`	`0`	Axis value for axis actions
`AxisTarget`	`MacroAxisTarget`	.	Which axis to target (e.g., `LeftThumbX`)
`AxisSource`	`MacroAxisSource`	.	`OutputController` (combined) or `InputDevice` (physical)
`SourceDeviceGuid`	`string`	`null`	Physical device GUID when `AxisSource == InputDevice` (N format)
`SourceDeviceAxisIndex`	`int`	`0`	Axis index on source device
`ProcessName`	`string`	`null`	Process name for AppVolume (e.g., "firefox")
`VolumeLimit`	`int`	`100`	Max volume % for SystemVolume/AppVolume (1–100)
`MouseSensitivity`	`float`	`10`	Pixels/scroll units per frame at full deflection
`MouseButton`	`MacroMouseButton`	.	`Left`, `Right`, `Middle`, `X1`, `X2`
`InvertAxis`	`bool`	`false`	Invert axis value
`ShowVolumeOsd`	`bool`	`true`	Show Windows volume flyout on changes

ProfileData

File: PadForge.App/Services/SettingsService.cs (inner class)

Per-application profile. Complete snapshot of device assignments, PadSettings, macros, slot topology, Extended/MIDI configs, and server settings.

Complete Property Reference

public class ProfileData
{
    [XmlAttribute] public string Id { get; set; } = Guid.NewGuid().ToString("N");
    [XmlElement] public string Name { get; set; } = "New Profile";
    [XmlElement] public string ExecutableNames { get; set; } = string.Empty;

    [XmlArray("Entries")][XmlArrayItem("Entry")]
    public ProfileEntry[] Entries { get; set; }

    [XmlArray("ProfilePadSettings")][XmlArrayItem("PadSetting")]
    public PadSetting[] PadSettings { get; set; }

    [XmlArray("ProfileMacros")][XmlArrayItem("Macro")]
    public MacroData[] Macros { get; set; }

    [XmlArray("ProfileSlotCreated")][XmlArrayItem("Created")]
    public bool[] SlotCreated { get; set; }

    [XmlArray("ProfileSlotEnabled")][XmlArrayItem("Enabled")]
    public bool[] SlotEnabled { get; set; }

    [XmlArray("ProfileSlotControllerTypes")][XmlArrayItem("Type")]
    public int[] SlotControllerTypes { get; set; }

    [XmlArray("ProfileExtendedConfigs")][XmlArrayItem("ExtendedConfig")]
    public ExtendedSlotConfigData[] ExtendedConfigs { get; set; }

    [XmlArray("ProfileMidiConfigs")][XmlArrayItem("MidiConfig")]
    public MidiSlotConfigData[] MidiConfigs { get; set; }

    [XmlElement] public bool EnableDsuMotionServer { get; set; }
    [XmlElement] public int DsuMotionServerPort { get; set; } = 26760;
    [XmlElement] public bool EnableWebController { get; set; }
    [XmlElement] public int WebControllerPort { get; set; } = 8080;
}

Property	Type	Description
`Id`	`string` (attribute)	GUID without hyphens
`Name`	`string`	Display name
`ExecutableNames`	`string`	Pipe-separated exe paths for auto-switching
`Entries`	`ProfileEntry[]`	Device-to-slot assignments
`PadSettings`	`PadSetting[]`	Deep-cloned, checksum-deduplicated PadSettings
`Macros`	`MacroData[]`	Per-slot macros (via PadIndex)
`SlotCreated`	`bool[]`	Slot topology. Null on old profiles (topology skipped).
`SlotEnabled`	`bool[]`	Slot enabled states. Null on old profiles.
`SlotControllerTypes`	`int[]`	Per-slot controller types. Null on old profiles.
`ExtendedConfigs`	`ExtendedSlotConfigData[]`	Extended slot configs for this profile
`MidiConfigs`	`MidiSlotConfigData[]`	MIDI configs for this profile
`EnableDsuMotionServer`	`bool`	DSU server state
`DsuMotionServerPort`	`int`	DSU port (default: 26760)
`EnableWebController`	`bool`	Web controller state
`WebControllerPort`	`int`	Web controller port (default: 8080)

ProfileEntry

Device-to-slot link within a profile:

public class ProfileEntry
{
    [XmlElement] public Guid InstanceGuid { get; set; }
    [XmlElement] public Guid ProductGuid { get; set; }
    [XmlElement] public int MapTo { get; set; }
    [XmlElement] public string PadSettingChecksum { get; set; }
}

ProductGuid enables fallback matching when InstanceGuid changes (e.g., BT reconnect, different USB port).

GlobalMacroData

File: PadForge.App/Services/SettingsService.cs (inner class)

A global (not per-slot) macro entry. Currently used for profile shortcuts and window toggle. Serialized inside <GlobalMacros> in the XML.

public class GlobalMacroData
{
    [XmlAttribute] public string Id { get; set; } = Guid.NewGuid().ToString("N");
    [XmlElement]   public SwitchProfileMode SwitchMode { get; set; }
    [XmlElement]   public string TargetProfileId { get; set; }
    [XmlElement]   public Guid TriggerDeviceGuid { get; set; }

    [XmlArray("TriggerEntries")][XmlArrayItem("Entry")]
    public TriggerButtonEntry[] TriggerEntries { get; set; }

    // Legacy migration fields (read-only, cleared after migration)
    [XmlArray("TriggerButtons")][XmlArrayItem("Btn")]
    public int[] LegacyTriggerRawButtons { get; set; }
}

Property	Type	Description
`Id`	`string` (attribute)	GUID without hyphens
`SwitchMode`	`SwitchProfileMode`	What the shortcut does. See enum below
`TargetProfileId`	`string`	For `Specific` mode: target profile ID. `null` = default profile.
`TriggerDeviceGuid`	`Guid`	Legacy device filter. `Guid.Empty` = any device.
`TriggerEntries`	`TriggerButtonEntry[]`	Per-button device-tracked combo entries
`LegacyTriggerRawButtons`	`int[]`	Old flat button indices. Migrated to `TriggerEntries` on load via `MigrateLegacyTrigger()`.

Legacy migration: MigrateLegacyTrigger() converts LegacyTriggerRawButtons into TriggerButtonEntry[], copying the top-level TriggerDeviceGuid into each entry's DeviceInstanceGuid. Runs once on deserialization; the legacy array is left in XML until the next save overwrites it.

SwitchProfileMode

public enum SwitchProfileMode
{
    Specific,      // Switch to a specific profile (TargetProfileId)
    Next,          // Cycle forward through profiles
    Previous,      // Cycle backward through profiles
    ToggleWindow   // Show/hide the main window (no profile change)
}

ToggleWindow was added to support controller-based window toggle without a profile switch. The engine sets InputManager.PendingToggleWindow instead of PendingProfileSwitchId.

TriggerButtonEntry

File: PadForge.App/Services/SettingsService.cs (inner class)

A single input in a global macro trigger combo. Each entry tracks which physical device it was recorded from, enabling cross-device combos (e.g., a gamepad button + a keyboard key).

public class TriggerButtonEntry
{
    [XmlElement] public int ButtonIndex { get; set; }
    [XmlElement] public Guid DeviceInstanceGuid { get; set; }
    [XmlElement] public Guid DeviceProductGuid { get; set; }
    [XmlElement] public bool IsAxis { get; set; }
    [XmlElement] public int AxisIndex { get; set; }
    [XmlElement] public float AxisThreshold { get; set; }
    [XmlElement] public AxisTriggerDirection AxisDirection { get; set; }
}

Field	Type	Description
`ButtonIndex`	`int`	Raw button index on the source device (when `IsAxis = false`)
`DeviceInstanceGuid`	`Guid`	Instance GUID of the device this entry was recorded from
`DeviceProductGuid`	`Guid`	Product GUID. Enables fallback matching after reconnect
`IsAxis`	`bool`	`true` = axis trigger, `false` = button trigger
`AxisIndex`	`int`	Axis index on the source device (when `IsAxis = true`)
`AxisThreshold`	`float`	Normalized threshold (0.0–1.0) the axis must exceed
`AxisDirection`	`AxisTriggerDirection`	Which direction the axis must deflect

AxisTriggerDirection

public enum AxisTriggerDirection
{
    Positive,  // Axis value above threshold (e.g., stick right, trigger pulled)
    Negative   // Axis value below 1-threshold (e.g., stick left)
}

Profile Snapshot Mechanism

UpdateActiveProfileSnapshot() captures current runtime state:

Entries: Creates ProfileEntry for each UserSetting.
PadSettings: Deep clones (CloneDeep()), deduplicated by checksum via HashSet.
Slot topology: Clones SlotCreated/SlotEnabled, collects OutputType per PadViewModel.
Type configs: Snapshots Extended/MIDI configs for created slots.
Server settings: DSU and web controller enable/port states.

Called during Save() after checksum recomputation, so profiles always reflect latest edits.

SettingsManager

File: PadForge.App/Common/SettingsManager.cs Namespace: PadForge.Common.Input Static partial class (canonical partial in SettingsManager.cs; additional declarations in InputManager.Step1.UpdateDevices.cs for UserDevices/UserSettings and collection class definitions)

Central manager for device records and mapping settings. Shared between engine thread and UI thread.

Lifecycle

SettingsService.Initialize() creates collections, loads XML.
InputManager.Step1 adds/updates UserDevices on connect/disconnect.
InputService (UI thread) reads collections to sync ViewModels.
SettingsService.Save() serializes to XML.

Thread Safety

All access to UserDevices and UserSettings must be done inside a lock on the respective collection's SyncRoot:

lock (SettingsManager.UserDevices.SyncRoot)
{
    // Safe to iterate/modify UserDevices.Items
}

Static Properties

Property	Type	Description
`UserDevices`	`DeviceCollection`	All known physical devices.
`UserSettings`	`SettingsCollection`	All device-to-slot assignments.
`Profiles`	`List<ProfileData>`	Saved profiles. Empty = none.
`ActiveProfileId`	`string`	Active named profile ID, or null for default.
`PendingDefaultSnapshot`	`ProfileData`	Default profile snapshot from load, before named profile applies. Used by `InputService.Start`.
`EnableAutoProfileSwitching`	`bool`	Auto-switch on foreground app change.
`SlotCreated`	`bool[16]`	Which slots are created. Persisted.
`SlotEnabled`	`bool[16]`	Which slots are enabled. Default: all true. Persisted.

Slot Limits

Constant	Value	Description
`MaxXbox360Slots`	`MaxPads` (16)	Maximum Xbox category virtual controllers (constant name kept from v2)
`MaxPlayStationSlots`	`MaxPads` (16)	Maximum PlayStation category virtual controllers
`MaxExtendedSlots`	16	Maximum Extended virtual controllers
`MaxMidiSlots`	`MaxPads` (16)	Maximum MIDI virtual controllers
`MaxKeyboardMouseSlots`	`MaxPads` (16)	Maximum Keyboard+Mouse virtual controllers

All types share a global 16-slot limit. "Add Controller" disappears when all 16 are in use.

DeviceCollection and SettingsCollection

Defined in InputManager.Step1.UpdateDevices.cs:

public class DeviceCollection
{
    public List<UserDevice> Items { get; } = new();
    public object SyncRoot { get; } = new();
}

public class SettingsCollection
{
    public List<UserSetting> Items { get; } = new();
    public object SyncRoot { get; } = new();

    public UserSetting FindByInstanceGuid(Guid guid) { ... }
    public List<UserSetting> FindByPadIndex(int padIndex) { ... }
}

Device Management Methods

Method	Description
`EnsureInitialized()`	Creates collections if null. Safe to call multiple times.
`FindDeviceByInstanceGuid(Guid)`	Thread-safe lookup. Returns null if not found.
`RemoveDevice(Guid)`	Removes device and all associated UserSettings. Thread-safe. Returns true if removed.

UserSetting Management Methods

Method	Description
`FindSettingByInstanceGuid(Guid)`	First UserSetting for device. Thread-safe.
`FindSettingByInstanceGuidAndSlot(Guid, int)`	UserSetting for device+slot pair. Thread-safe.
`AssignDeviceToSlot(Guid, int)`	Create or return existing. Multi-slot: new entry per additional slot. Does NOT create PadSetting. Thread-safe.
`UnassignDevice(Guid)`	Remove all UserSettings for device. Thread-safe.
`ToggleDeviceSlotAssignment(Guid, int)`	Toggle assignment. Returns `(bool Assigned, UserSetting)`. Thread-safe.
`GetAssignedSlots(Guid)`	Sorted slot indices for device. Thread-safe.
`GetSettingsForSlot(int)`	All UserSettings mapped to a slot. Thread-safe.

Slot Swap

public static void SwapSlots(int slotA, int slotB)

Swaps all persisted slot data between two indices.

Swaps SlotCreated[A] and SlotCreated[B]
Swaps SlotEnabled[A] and SlotEnabled[B]
Updates all UserSetting.MapTo values (A->B, B->A) under lock

Auto-Mapping

public static PadSetting CreateDefaultPadSetting(UserDevice ud,
    VirtualControllerType outputType = VirtualControllerType.Microsoft)

Creates a default PadSetting with auto-mapped inputs. Only auto-maps when ud.CapType == InputDeviceType.Gamepad and ForceRawJoystickMode is off. Non-gamepads get an empty PadSetting.

MIDI auto-mapping: When outputType == Midi, maps 6 CCs (MidiCC0–MidiCC5 from Axis 0–Axis 5) and 11 notes (MidiNote0–MidiNote10 from Button 0–Button 10).

Standardized SDL3 Gamepad Layout (Xbox / PlayStation / Extended gamepad preset):

Target	Source	Descriptor
LeftThumbAxisX	SDL Gamepad Axis 0 (LX)	`"Axis 0"`
LeftThumbAxisY	SDL Gamepad Axis 1 (LY)	`"Axis 1"`
LeftTrigger	SDL Gamepad Axis 2 (LT)	`"Axis 2"`
RightThumbAxisX	SDL Gamepad Axis 3 (RX)	`"Axis 3"`
RightThumbAxisY	SDL Gamepad Axis 4 (RY)	`"Axis 4"`
RightTrigger	SDL Gamepad Axis 5 (RT)	`"Axis 5"`
DPadUp / DPadDown / DPadLeft / DPadRight	SDL Gamepad Hat	`"POV 0 Up"` / `"POV 0 Down"` / `"POV 0 Left"` / `"POV 0 Right"`
ButtonA	SDL Gamepad Button 0 (A/Cross)	`"Button 0"`
ButtonB	SDL Gamepad Button 1 (B/Circle)	`"Button 1"`
ButtonX	SDL Gamepad Button 2 (X/Square)	`"Button 2"`
ButtonY	SDL Gamepad Button 3 (Y/Triangle)	`"Button 3"`
LeftShoulder	SDL Gamepad Button 4 (LB/L1)	`"Button 4"`
RightShoulder	SDL Gamepad Button 5 (RB/R1)	`"Button 5"`
ButtonBack	SDL Gamepad Button 6 (Back/Share)	`"Button 6"`
ButtonStart	SDL Gamepad Button 7 (Start/Options)	`"Button 7"`
LeftThumbButton	SDL Gamepad Button 8 (LS/L3)	`"Button 8"`
RightThumbButton	SDL Gamepad Button 9 (RS/R3)	`"Button 9"`
ButtonGuide	SDL Gamepad Button 10 (Guide/PS)	`"Button 10"`

Default deadzones are set to 0, force feedback to 100%, no motor swap.

public static void ReAutoMapSlot(int padIndex, VirtualControllerType outputType)

Re-automaps all devices assigned to a slot for the given output type. Called when switching VC type. Creates a new default PadSetting per device, updates checksums.

Serialization Pipeline

Save Flow (Detailed)

SettingsService.MarkDirty() starts a 250 ms debounce timer. On fire, calls Save() then SaveToFile(filePath):

User action (slider drag, mapping change, etc.)
    |
    v
SettingsService.MarkDirty()
    |-- Sets IsDirty = true
    |-- Sets ViewModel.HasUnsavedChanges = true
    |-- Starts/restarts 250ms DispatcherTimer
    |
    ... (250ms debounce, timer restarts on each MarkDirty call) ...
    |
    v
Timer fires -> Save() -> SaveToFile(filePath)
    |
    v  Step 1: UpdatePadSettingsFromViewModels()
    |  For each PadViewModel (slot 0-15):
    |    - Find the selected device's UserSetting for this slot
    |    - Write all ViewModel slider/toggle values back to PadSetting:
    |      ForceOverall, LeftMotorStrength, RightMotorStrength, ForceSwapMotor,
    |      AudioRumble settings, deadzones (X/Y), anti-deadzones (X/Y),
    |      linear, sensitivity curves, max ranges (pos + neg), center offsets,
    |      trigger deadzones, trigger anti-deadzones, trigger max ranges
    |    - Write Extended custom stick/trigger settings for indices 2+ via SetExtendedMapping()
    |    - Write mapping descriptors via SetPadSettingProperty() (reflection or dict)
    |
    v  Step 2: Flush dictionaries and recompute checksums
    |  For each UserSetting's PadSetting:
    |    - FlushExtendedMappings() -- dict -> ExtendedMappingEntries[]
    |    - FlushMidiMappings() -- dict -> MidiMappingEntries[]
    |    - FlushKbmMappings() -- dict -> KbmMappingEntries[]
    |    - UpdateChecksum() -- recompute MD5 from all properties
    |    - Sync: us.PadSettingChecksum = ps.PadSettingChecksum
    |
    v  Step 3: UpdateActiveProfileSnapshot()
    |  If a named profile is active, write current runtime state back to it:
    |    entries, PadSettings (deep cloned + deduplicated), slot topology,
    |    Extended/MIDI configs, DSU/web server settings
    |
    v  Step 4: Collect data under SyncRoot locks
    |    data.Devices = UserDevices.Items.ToArray()
    |    data.Settings = UserSettings.Items.ToArray()
    |    data.PadSettings = unique PadSettings (deduplicated by checksum via HashSet)
    |
    v  Step 5: Build DTOs
    |    data.AppSettings = BuildAppSettings()  -- from SettingsViewModel
    |    data.Macros = BuildMacroData()  -- from all PadViewModels
    |    data.Profiles = SettingsManager.Profiles.ToArray()
    |
    v  Step 6: XmlSerializer.Serialize(stream, data)
    |
    v  Step 7: IsDirty = false, raise AutoSaved event

After saving, AutoSaved fires so InputService can refresh the default profile snapshot.

Load Flow (Detailed)

SettingsService.LoadFromFile(string filePath):

LoadFromFile(filePath)
    |
    v  Step 1: XmlSerializer.Deserialize(stream) -> SettingsFileData
    |
    v  Step 2: Populate UserDevices
    |  Lock UserDevices.SyncRoot, clear, add all devices from XML
    |
    v  Step 3: Populate UserSettings with PadSetting cloning
    |  Lock UserSettings.SyncRoot, clear, then for each UserSetting:
    |    - Find matching PadSetting by PadSettingChecksum
    |    - CLONE it via CloneDeep() (critical: prevents shared mutation)
    |    - SetPadSetting(clone) on the UserSetting
    |    - Add to UserSettings.Items
    |
    v  Step 4: Purge orphaned UserSettings
    |  RemoveAll(us => us.MapTo < 0) -- stale entries from older versions
    |
    v  Step 5: LoadAppSettings(data.AppSettings) -- ORDER MATTERS
    |  a. Load scalar settings (AutoStartEngine, MinimizeToTray, etc.)
    |  b. SetLanguageFromCode(appSettings.Language)
    |  c. Sync EnableAutoProfileSwitching and ActiveProfileId
    |  d. Load SlotCreated[] (MUST be before OutputType!)
    |     - If null: AutoCreateSlotsFromExistingAssignments()
    |  e. Load SlotEnabled[] (defaults to all-true on null)
    |  f. Load SlotControllerTypes[] (only for created slots)
    |  g. ApplyExtendedConfigs() and ApplyMidiConfigs()
    |  h. Load DSU/web server settings
    |
    v  Step 6: LoadPadSettings(data.Settings, data.PadSettings)
    |  For each UserSetting, first device per slot only:
    |    - Load force feedback settings to PadViewModel
    |    - Load deadzones (X/Y), call MigrateAntiDeadZones()
    |    - Load sensitivity curves, max ranges, call MigrateMaxRangeDirections()
    |    - Load center offsets, trigger settings
    |    - SyncAllConfigItemsFromVm()
    |    - Load Extended custom stick/trigger settings for indices 2+
    |    - LoadMappingDescriptors() -- mapping rows from PadSetting
    |
    v  Step 7: LoadMacros(data.Macros)
    |  Clear all pad macros, reconstruct from serialized data
    |
    v  Step 8: LoadProfiles(data.Profiles, data.AppSettings)
    |  Always includes built-in "Default" profile at top
    |  Add all serialized profiles
    |  If a named profile was active at shutdown:
    |    - Restore PendingDefaultSnapshot from appSettings.DefaultProfileSnapshot
    |    - Apply the named profile's topology (SlotCreated, SlotEnabled, types)
    |    - Apply the named profile's Extended/MIDI configs

Critical load order: SlotCreated must load before OutputType. Setting OutputType fires PropertyChanged which calls RefreshNavControllerItems() which reads SlotCreated[]. Wrong order causes a double-rebuild crash.

CloneDeep during load is critical: Without cloning, devices sharing a checksum would share one PadSetting instance. Changing one device's deadzone would silently corrupt the other's.

Autosave Debounce

250 ms debounce via DispatcherTimer. Rapid changes (e.g., slider drag) batch into one save:

MarkDirty() called  -->  start/restart 250ms timer
MarkDirty() called  -->  restart 250ms timer
MarkDirty() called  -->  restart 250ms timer
...250ms passes...
Timer fires         -->  Save()  -->  AutoSaved event

Cross-Layout Mapping Translation

Source file: PadForge.Engine/Data/MappingTranslation.cs

When copying mappings between different VC types (e.g., Xbox to PlayStation, Extended to MIDI), PadForge translates property names through a canonical positional system.

How It Works

Each layout maps its property names (e.g., ButtonA, ExtendedBtn0, MidiNote60) to a canonical MappingSlot(Category, Position) where category is Button, Axis, AxisNeg, or DPad. Translation:

Source property name -> source layout table -> MappingSlot
MappingSlot -> target layout table -> target property name

Example: Xbox to Extended with custom layout: ButtonA -> MappingSlot(Button, 0) -> ExtendedBtn0.

Layout Groups

Layout	Types	Example Properties
Gamepad	Xbox, PlayStation, Extended (gamepad-shape default)	`ButtonA`, `LeftThumbAxisX`, `DPadUp`
Extended Custom	Extended with a custom layout (non-gamepad axis/button/POV counts)	`ExtendedBtn0`, `ExtendedAxis0`, `ExtendedPov0Up`
MIDI	MIDI	`MidiNote0`, `MidiCC0`
KB+M	Keyboard + Mouse	`KbmMBtn0`, `KbmMouseX`, `KbmKey20`

The bool isExtended parameter on MappingTranslation methods routes Extended slots into the Extended Custom layout when their layout no longer matches the gamepad shape.

Xbox and PlayStation share property names, so IsSameLayout() skips translation between them.

Translation runs automatically during Pad page copy/paste when controller types differ.

Backward Compatibility

SlotCreated Array (Pre-Multi-Slot)

Old files lack <SlotCreated> (null on deserialization). AutoCreateSlotsFromExistingAssignments() scans UserSettings and creates slots for assigned MapTo indices:

private static void AutoCreateSlotsFromExistingAssignments()
{
    foreach (var us in settings.Items)
    {
        int idx = us.MapTo;
        if (idx >= 0 && idx < InputManager.MaxPads) // MaxPads = 16
        {
            SettingsManager.SlotCreated[idx] = true;
            SettingsManager.SlotEnabled[idx] = true;
        }
    }
}

Array Size Migration (4-Slot to 16-Slot)

SlotCreated/SlotEnabled/SlotControllerTypes use Math.Min(source.Length, target.Length) copy for files saved with a different MaxPads:

int count = Math.Min(appSettings.SlotCreated.Length, SettingsManager.SlotCreated.Length);
Array.Copy(appSettings.SlotCreated, SettingsManager.SlotCreated, count);

Null Array Defaults

Array	Null Default
`SlotEnabled`	All `true`
`SlotControllerTypes`	Xbox (`Xbox = 0`). Uncreated slots skipped to prevent stale values.
`ExtendedConfigs`	One `ExtendedSlotConfigData` per slot with default counts (`ThumbstickCount=2`, `TriggerCount=2`, `PovCount=1`, `ButtonCount=11`) and `Customize=false`. The v2 `Preset` enum that previously seeded these defaults was dropped in commit `d57a725`; the same numeric defaults now come from the field initializers.
`MidiConfigs`	Channel 1, 6 CCs at CC 1, 11 notes at note 60, velocity 127

Anti-Deadzone Migration

MigrateAntiDeadZones() migrates unified LeftThumbAntiDeadZone/RightThumbAntiDeadZone to per-axis X/Y. Only runs when per-axis values are empty/zero and unified is non-zero. Idempotent.

Max Range Direction Migration

MigrateMaxRangeDirections() copies symmetric max range to negative-direction properties when null/empty (e.g., LeftThumbMaxRangeXNeg = LeftThumbMaxRangeX). Backward-compatible with pre-independent-range files.

Profile Topology

Old profiles without topology (SlotCreated == null) skip topology application during switch. Previous slot layout is preserved.

Orphaned UserSettings

On load, RemoveAll(us => us.MapTo < 0) purges stale entries with MapTo == -1 from older versions.

Settings and Serialization

Settings and Serialization

Table of Contents

PadForge.xml File Format

File Discovery

SettingsFileData (Root DTO)

Complete XML Structure

Key Design Decisions

UserDevice

Serializable Identity Properties

Serializable Capability Properties

Serializable Metadata

Input Hiding

Runtime-Only Properties ([XmlIgnore])

Convenience Properties ([XmlIgnore])

Loading Methods

UserSetting

Serializable Properties

Runtime-Only Properties ([XmlIgnore])

Multi-Slot Assignment Design

PadSetting

Checksum System

ComputeChecksum(). What Is Included

Deduplication During Save

Descriptor Format

Complete PadSetting Property Reference

Button Mapping Properties

D-Pad Mapping Properties

Trigger Mapping Properties

Thumbstick Axis Mapping Properties

Deadzone / Response Curve Properties

Deadzone Shape

Sensitivity Curve Properties

Stick Calibration

Force Feedback Properties

Audio Rumble Properties

Axis Inversion and Threshold

Dictionary-Based Mapping Systems

Extended Custom Mappings

MIDI Mappings

KBM (Keyboard+Mouse) Mappings

Mapping Deadzones

Shared Entry Type

Dictionary Methods (same pattern for all three)

CopyablePropertyNames

Utility Methods

Migration Methods

AppSettingsData

Complete Property Reference

Default Profile Snapshot Mechanism

ExtendedSlotConfigData

MidiSlotConfigData

MacroData and ActionData

MacroData

ActionData

ProfileData

Complete Property Reference

ProfileEntry

GlobalMacroData

SwitchProfileMode

TriggerButtonEntry

AxisTriggerDirection

Profile Snapshot Mechanism

SettingsManager

Lifecycle

Thread Safety

Static Properties

Slot Limits

DeviceCollection and SettingsCollection

Device Management Methods

UserSetting Management Methods

Slot Swap

Auto-Mapping

Serialization Pipeline

Save Flow (Detailed)

Load Flow (Detailed)

Autosave Debounce

Cross-Layout Mapping Translation

How It Works

Layout Groups

Runtime-Only Properties (`[XmlIgnore]`)

Convenience Properties (`[XmlIgnore]`)

Runtime-Only Properties (`[XmlIgnore]`)