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#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2009 the Open Toolkit library.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
#endregion
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;
using OpenTK.Graphics;
using OpenTK.Input;
using System.Collections.Generic;
using System.IO;
using System.Drawing;
namespace OpenTK.Platform.Windows
{
/// \internal
/// <summary>
/// Drives GameWindow on Windows.
/// This class supports OpenTK, and is not intended for use by OpenTK programs.
/// </summary>
internal sealed class WinGLNative : INativeWindow, IInputDriver
{
#region Fields
const ExtendedWindowStyle ParentStyleEx = ExtendedWindowStyle.WindowEdge | ExtendedWindowStyle.ApplicationWindow;
const ExtendedWindowStyle ChildStyleEx = 0;
static readonly WinKeyMap KeyMap = new WinKeyMap();
readonly IntPtr Instance = Marshal.GetHINSTANCE(typeof(WinGLNative).Module);
readonly IntPtr ClassName = Marshal.StringToHGlobalAuto(Guid.NewGuid().ToString());
readonly WindowProcedure WindowProcedureDelegate;
readonly uint ModalLoopTimerPeriod = 1;
UIntPtr timer_handle;
readonly Functions.TimerProc ModalLoopCallback;
bool class_registered;
bool disposed;
bool exists;
WinWindowInfo window, child_window;
WindowBorder windowBorder = WindowBorder.Resizable;
Nullable<WindowBorder> previous_window_border; // Set when changing to fullscreen state.
Nullable<WindowBorder> deferred_window_border; // Set to avoid changing borders during fullscreen state.
WindowState windowState = WindowState.Normal;
bool borderless_maximized_window_state = false; // Hack to get maximized mode with hidden border (not normally possible).
bool focused;
bool mouse_outside_window = true;
bool invisible_since_creation; // Set by WindowsMessage.CREATE and consumed by Visible = true (calls BringWindowToFront).
int suppress_resize; // Used in WindowBorder and WindowState in order to avoid rapid, consecutive resize events.
Rectangle
bounds = new Rectangle(),
client_rectangle = new Rectangle(),
previous_bounds = new Rectangle(); // Used to restore previous size when leaving fullscreen mode.
Icon icon;
const ClassStyle DefaultClassStyle = ClassStyle.OwnDC;
// Used for IInputDriver implementation
WinMMJoystick joystick_driver = new WinMMJoystick();
KeyboardDevice keyboard = new KeyboardDevice();
MouseDevice mouse = new MouseDevice();
IList<KeyboardDevice> keyboards = new List<KeyboardDevice>(1);
IList<MouseDevice> mice = new List<MouseDevice>(1);
const long ExtendedBit = 1 << 24; // Used to distinguish left and right control, alt and enter keys.
static readonly uint ShiftRightScanCode = Functions.MapVirtualKey(VirtualKeys.RSHIFT, 0); // Used to distinguish left and right shift keys.
KeyPressEventArgs key_press = new KeyPressEventArgs((char)0);
int cursor_visible_count = 0;
static readonly object SyncRoot = new object();
#endregion
#region Contructors
public WinGLNative(int x, int y, int width, int height, string title, GameWindowFlags options, DisplayDevice device)
{
lock (SyncRoot)
{
// This is the main window procedure callback. We need the callback in order to create the window, so
// don't move it below the CreateWindow calls.
WindowProcedureDelegate = WindowProcedure;
//// This timer callback is called periodically when the window enters a sizing / moving modal loop.
//ModalLoopCallback = delegate(IntPtr handle, WindowMessage msg, UIntPtr eventId, int time)
//{
// // Todo: find a way to notify the frontend that it should process queued up UpdateFrame/RenderFrame events.
// if (Move != null)
// Move(this, EventArgs.Empty);
//};
// To avoid issues with Ati drivers on Windows 6+ with compositing enabled, the context will not be
// bound to the top-level window, but rather to a child window docked in the parent.
window = new WinWindowInfo(
CreateWindow(x, y, width, height, title, options, device, IntPtr.Zero), null);
child_window = new WinWindowInfo(
CreateWindow(0, 0, ClientSize.Width, ClientSize.Height, title, options, device, window.WindowHandle), window);
exists = true;
keyboard.Description = "Standard Windows keyboard";
keyboard.NumberOfFunctionKeys = 12;
keyboard.NumberOfKeys = 101;
keyboard.NumberOfLeds = 3;
mouse.Description = "Standard Windows mouse";
mouse.NumberOfButtons = 3;
mouse.NumberOfWheels = 1;
keyboards.Add(keyboard);
mice.Add(mouse);
}
}
#endregion
#region Private Members
#region WindowProcedure
IntPtr WindowProcedure(IntPtr handle, WindowMessage message, IntPtr wParam, IntPtr lParam)
{
switch (message)
{
#region Size / Move / Style events
case WindowMessage.ACTIVATE:
// See http://msdn.microsoft.com/en-us/library/ms646274(VS.85).aspx (WM_ACTIVATE notification):
// wParam: The low-order word specifies whether the window is being activated or deactivated.
bool new_focused_state = Focused;
if (IntPtr.Size == 4)
focused = (wParam.ToInt32() & 0xFFFF) != 0;
else
focused = (wParam.ToInt64() & 0xFFFF) != 0;
if (new_focused_state != Focused)
FocusedChanged(this, EventArgs.Empty);
break;
case WindowMessage.ENTERMENULOOP:
case WindowMessage.ENTERSIZEMOVE:
// Entering the modal size/move loop: we don't want rendering to
// stop during this time, so we register a timer callback to continue
// processing from time to time.
StartTimer(handle);
break;
case WindowMessage.EXITMENULOOP:
case WindowMessage.EXITSIZEMOVE:
// ExitingmModal size/move loop: the timer callback is no longer
// necessary.
StopTimer(handle);
break;
case WindowMessage.ERASEBKGND:
return new IntPtr(1);
case WindowMessage.WINDOWPOSCHANGED:
unsafe
{
WindowPosition* pos = (WindowPosition*)lParam;
if (window != null && pos->hwnd == window.WindowHandle)
{
Point new_location = new Point(pos->x, pos->y);
if (Location != new_location)
{
bounds.Location = new_location;
Move(this, EventArgs.Empty);
}
Size new_size = new Size(pos->cx, pos->cy);
if (Size != new_size)
{
bounds.Width = pos->cx;
bounds.Height = pos->cy;
Win32Rectangle rect;
Functions.GetClientRect(handle, out rect);
client_rectangle = rect.ToRectangle();
Functions.SetWindowPos(child_window.WindowHandle, IntPtr.Zero, 0, 0, ClientRectangle.Width, ClientRectangle.Height,
SetWindowPosFlags.NOZORDER | SetWindowPosFlags.NOOWNERZORDER |
SetWindowPosFlags.NOACTIVATE | SetWindowPosFlags.NOSENDCHANGING);
if (suppress_resize <= 0)
Resize(this, EventArgs.Empty);
}
// Ensure cursor remains grabbed
if (!CursorVisible)
GrabCursor();
}
}
break;
case WindowMessage.STYLECHANGED:
unsafe
{
if (wParam.ToInt64() == (long)GWL.STYLE)
{
WindowStyle style = ((StyleStruct*)lParam)->New;
if ((style & WindowStyle.Popup) != 0)
windowBorder = WindowBorder.Hidden;
else if ((style & WindowStyle.ThickFrame) != 0)
windowBorder = WindowBorder.Resizable;
else if ((style & ~(WindowStyle.ThickFrame | WindowStyle.MaximizeBox)) != 0)
windowBorder = WindowBorder.Fixed;
}
}
// Ensure cursor remains grabbed
if (!CursorVisible)
GrabCursor();
break;
case WindowMessage.SIZE:
SizeMessage state = (SizeMessage)wParam.ToInt64();
WindowState new_state = windowState;
switch (state)
{
case SizeMessage.RESTORED: new_state = borderless_maximized_window_state ?
WindowState.Maximized : WindowState.Normal; break;
case SizeMessage.MINIMIZED: new_state = WindowState.Minimized; break;
case SizeMessage.MAXIMIZED: new_state = WindowBorder == WindowBorder.Hidden ?
WindowState.Fullscreen : WindowState.Maximized;
break;
}
if (new_state != windowState)
{
windowState = new_state;
WindowStateChanged(this, EventArgs.Empty);
}
// Ensure cursor remains grabbed
if (!CursorVisible)
GrabCursor();
break;
#endregion
#region Input events
case WindowMessage.CHAR:
if (IntPtr.Size == 4)
key_press.KeyChar = (char)wParam.ToInt32();
else
key_press.KeyChar = (char)wParam.ToInt64();
KeyPress(this, key_press);
break;
case WindowMessage.MOUSEMOVE:
Point point = new Point(
(short)((uint)lParam.ToInt32() & 0x0000FFFF),
(short)(((uint)lParam.ToInt32() & 0xFFFF0000) >> 16));
mouse.Position = point;
if (mouse_outside_window)
{
// Once we receive a mouse move event, it means that the mouse has
// re-entered the window.
mouse_outside_window = false;
EnableMouseTracking();
MouseEnter(this, EventArgs.Empty);
}
break;
case WindowMessage.MOUSELEAVE:
mouse_outside_window = true;
// Mouse tracking is disabled automatically by the OS
MouseLeave(this, EventArgs.Empty);
break;
case WindowMessage.MOUSEWHEEL:
// This is due to inconsistent behavior of the WParam value on 64bit arch, whese
// wparam = 0xffffffffff880000 or wparam = 0x00000000ff100000
mouse.WheelPrecise += ((long)wParam << 32 >> 48) / 120.0f;
break;
case WindowMessage.LBUTTONDOWN:
Functions.SetCapture(window.WindowHandle);
mouse[MouseButton.Left] = true;
break;
case WindowMessage.MBUTTONDOWN:
Functions.SetCapture(window.WindowHandle);
mouse[MouseButton.Middle] = true;
break;
case WindowMessage.RBUTTONDOWN:
Functions.SetCapture(window.WindowHandle);
mouse[MouseButton.Right] = true;
break;
case WindowMessage.XBUTTONDOWN:
Functions.SetCapture(window.WindowHandle);
mouse[((wParam.ToInt32() & 0xFFFF0000) >> 16) !=
(int)MouseKeys.XButton1 ? MouseButton.Button1 : MouseButton.Button2] = true;
break;
case WindowMessage.LBUTTONUP:
Functions.ReleaseCapture();
mouse[MouseButton.Left] = false;
break;
case WindowMessage.MBUTTONUP:
Functions.ReleaseCapture();
mouse[MouseButton.Middle] = false;
break;
case WindowMessage.RBUTTONUP:
Functions.ReleaseCapture();
mouse[MouseButton.Right] = false;
break;
case WindowMessage.XBUTTONUP:
Functions.ReleaseCapture();
mouse[((wParam.ToInt32() & 0xFFFF0000) >> 16) !=
(int)MouseKeys.XButton1 ? MouseButton.Button1 : MouseButton.Button2] = false;
break;
// Keyboard events:
case WindowMessage.KEYDOWN:
case WindowMessage.KEYUP:
case WindowMessage.SYSKEYDOWN:
case WindowMessage.SYSKEYUP:
bool pressed =
message == WindowMessage.KEYDOWN ||
message == WindowMessage.SYSKEYDOWN;
// Shift/Control/Alt behave strangely when e.g. ShiftRight is held down and ShiftLeft is pressed
// and released. It looks like neither key is released in this case, or that the wrong key is
// released in the case of Control and Alt.
// To combat this, we are going to release both keys when either is released. Hacky, but should work.
// Win95 does not distinguish left/right key constants (GetAsyncKeyState returns 0).
// In this case, both keys will be reported as pressed.
bool extended = (lParam.ToInt64() & ExtendedBit) != 0;
switch ((VirtualKeys)wParam)
{
case VirtualKeys.SHIFT:
// The behavior of this key is very strange. Unlike Control and Alt, there is no extended bit
// to distinguish between left and right keys. Moreover, pressing both keys and releasing one
// may result in both keys being held down (but not always).
// The only reliable way to solve this was reported by BlueMonkMN at the forums: we should
// check the scancodes. It looks like GLFW does the same thing, so it should be reliable.
// Note: we release both keys when either shift is released.
// Otherwise, the state of one key might be stuck to pressed.
if (ShiftRightScanCode != 0 && pressed)
{
unchecked
{
if (((lParam.ToInt64() >> 16) & 0xFF) == ShiftRightScanCode)
keyboard[Input.Key.ShiftRight] = pressed;
else
keyboard[Input.Key.ShiftLeft] = pressed;
}
}
else
{
// Windows 9x and NT4.0 or key release event.
keyboard[Input.Key.ShiftLeft] = keyboard[Input.Key.ShiftRight] = pressed;
}
return IntPtr.Zero;
case VirtualKeys.CONTROL:
if (extended)
keyboard[Input.Key.ControlRight] = pressed;
else
keyboard[Input.Key.ControlLeft] = pressed;
return IntPtr.Zero;
case VirtualKeys.MENU:
if (extended)
keyboard[Input.Key.AltRight] = pressed;
else
keyboard[Input.Key.AltLeft] = pressed;
return IntPtr.Zero;
case VirtualKeys.RETURN:
if (extended)
keyboard[Key.KeypadEnter] = pressed;
else
keyboard[Key.Enter] = pressed;
return IntPtr.Zero;
default:
if (!KeyMap.ContainsKey((VirtualKeys)wParam))
{
Debug.Print("Virtual key {0} ({1}) not mapped.", (VirtualKeys)wParam, (long)lParam);
break;
}
else
{
keyboard[KeyMap[(VirtualKeys)wParam]] = pressed;
}
return IntPtr.Zero;
}
break;
case WindowMessage.SYSCHAR:
return IntPtr.Zero;
case WindowMessage.KILLFOCUS:
keyboard.ClearKeys();
break;
#endregion
#region Creation / Destruction events
case WindowMessage.CREATE:
CreateStruct cs = (CreateStruct)Marshal.PtrToStructure(lParam, typeof(CreateStruct));
if (cs.hwndParent == IntPtr.Zero)
{
bounds.X = cs.x;
bounds.Y = cs.y;
bounds.Width = cs.cx;
bounds.Height = cs.cy;
Win32Rectangle rect;
Functions.GetClientRect(handle, out rect);
client_rectangle = rect.ToRectangle();
invisible_since_creation = true;
}
break;
case WindowMessage.CLOSE:
System.ComponentModel.CancelEventArgs e = new System.ComponentModel.CancelEventArgs();
Closing(this, e);
if (!e.Cancel)
{
DestroyWindow();
break;
}
return IntPtr.Zero;
case WindowMessage.DESTROY:
exists = false;
Functions.UnregisterClass(ClassName, Instance);
window.Dispose();
child_window.Dispose();
Closed(this, EventArgs.Empty);
break;
#endregion
}
return Functions.DefWindowProc(handle, message, wParam, lParam);
}
private void EnableMouseTracking()
{
TrackMouseEventStructure me = new TrackMouseEventStructure();
me.Size = TrackMouseEventStructure.SizeInBytes;
me.TrackWindowHandle = child_window.WindowHandle;
me.Flags = TrackMouseEventFlags.LEAVE;
if (!Functions.TrackMouseEvent(ref me))
Debug.Print("[Warning] Failed to enable mouse tracking, error: {0}.",
Marshal.GetLastWin32Error());
}
private void StartTimer(IntPtr handle)
{
if (timer_handle == UIntPtr.Zero)
{
timer_handle = Functions.SetTimer(handle, new UIntPtr(1), ModalLoopTimerPeriod, ModalLoopCallback);
if (timer_handle == UIntPtr.Zero)
Debug.Print("[Warning] Failed to set modal loop timer callback ({0}:{1}->{2}).",
GetType().Name, handle, Marshal.GetLastWin32Error());
}
}
private void StopTimer(IntPtr handle)
{
if (timer_handle != UIntPtr.Zero)
{
if (!Functions.KillTimer(handle, timer_handle))
Debug.Print("[Warning] Failed to kill modal loop timer callback ({0}:{1}->{2}).",
GetType().Name, handle, Marshal.GetLastWin32Error());
timer_handle = UIntPtr.Zero;
}
}
#endregion
#region IsIdle
bool IsIdle
{
get
{
MSG message = new MSG();
return !Functions.PeekMessage(ref message, window.WindowHandle, 0, 0, 0);
}
}
#endregion
#region CreateWindow
IntPtr CreateWindow(int x, int y, int width, int height, string title, GameWindowFlags options, DisplayDevice device, IntPtr parentHandle)
{
// Use win32 to create the native window.
// Keep in mind that some construction code runs in the WM_CREATE message handler.
// The style of a parent window is different than that of a child window.
// Note: the child window should always be visible, even if the parent isn't.
WindowStyle style = 0;
ExtendedWindowStyle ex_style = 0;
if (parentHandle == IntPtr.Zero)
{
style |= WindowStyle.OverlappedWindow | WindowStyle.ClipChildren;
ex_style = ParentStyleEx;
}
else
{
style |= WindowStyle.Visible | WindowStyle.Child | WindowStyle.ClipSiblings;
ex_style = ChildStyleEx;
}
// Find out the final window rectangle, after the WM has added its chrome (titlebar, sidebars etc).
Win32Rectangle rect = new Win32Rectangle();
rect.left = x; rect.top = y; rect.right = x + width; rect.bottom = y + height;
Functions.AdjustWindowRectEx(ref rect, style, false, ex_style);
// Create the window class that we will use for this window.
// The current approach is to register a new class for each top-level WinGLWindow we create.
if (!class_registered)
{
ExtendedWindowClass wc = new ExtendedWindowClass();
wc.Size = ExtendedWindowClass.SizeInBytes;
wc.Style = DefaultClassStyle;
wc.Instance = Instance;
wc.WndProc = WindowProcedureDelegate;
wc.ClassName = ClassName;
wc.Icon = Icon != null ? Icon.Handle : IntPtr.Zero;
#warning "This seems to resize one of the 'large' icons, rather than using a small icon directly (multi-icon files). Investigate!"
wc.IconSm = Icon != null ? new Icon(Icon, 16, 16).Handle : IntPtr.Zero;
wc.Cursor = Functions.LoadCursor(CursorName.Arrow);
ushort atom = Functions.RegisterClassEx(ref wc);
if (atom == 0)
throw new PlatformException(String.Format("Failed to register window class. Error: {0}", Marshal.GetLastWin32Error()));
class_registered = true;
}
IntPtr window_name = Marshal.StringToHGlobalAuto(title);
IntPtr handle = Functions.CreateWindowEx(
ex_style, ClassName, window_name, style,
rect.left, rect.top, rect.Width, rect.Height,
parentHandle, IntPtr.Zero, Instance, IntPtr.Zero);
if (handle == IntPtr.Zero)
throw new PlatformException(String.Format("Failed to create window. Error: {0}", Marshal.GetLastWin32Error()));
return handle;
}
#endregion
#region DestroyWindow
/// <summary>
/// Starts the teardown sequence for the current window.
/// </summary>
void DestroyWindow()
{
if (Exists)
{
Debug.Print("Destroying window: {0}", window.ToString());
Functions.DestroyWindow(window.WindowHandle);
exists = false;
}
}
#endregion
void HideBorder()
{
suppress_resize++;
WindowBorder = WindowBorder.Hidden;
ProcessEvents();
suppress_resize--;
}
void RestoreBorder()
{
suppress_resize++;
WindowBorder =
deferred_window_border.HasValue ? deferred_window_border.Value :
previous_window_border.HasValue ? previous_window_border.Value :
WindowBorder;
ProcessEvents();
suppress_resize--;
deferred_window_border = previous_window_border = null;
}
void ResetWindowState()
{
suppress_resize++;
WindowState = WindowState.Normal;
ProcessEvents();
suppress_resize--;
}
void GrabCursor()
{
Point pos = PointToScreen(new Point(ClientRectangle.X, ClientRectangle.Y));
Win32Rectangle rect = new Win32Rectangle();
rect.left = pos.X;
rect.right = pos.X + ClientRectangle.Width;
rect.top = pos.Y;
rect.bottom = pos.Y + ClientRectangle.Height;
if (!Functions.ClipCursor(ref rect))
Debug.WriteLine(String.Format("Failed to grab cursor. Error: {0}",
Marshal.GetLastWin32Error()));
}
void UngrabCursor()
{
if (!Functions.ClipCursor(IntPtr.Zero))
Debug.WriteLine(String.Format("Failed to ungrab cursor. Error: {0}",
Marshal.GetLastWin32Error()));
}
#endregion
#region INativeWindow Members
#region Bounds
public Rectangle Bounds
{
get { return bounds; }
set
{
// Note: the bounds variable is updated when the resize/move message arrives.
Functions.SetWindowPos(window.WindowHandle, IntPtr.Zero, value.X, value.Y, value.Width, value.Height, 0);
}
}
#endregion
#region Location
public Point Location
{
get { return Bounds.Location; }
set
{
// Note: the bounds variable is updated when the resize/move message arrives.
Functions.SetWindowPos(window.WindowHandle, IntPtr.Zero, value.X, value.Y, 0, 0, SetWindowPosFlags.NOSIZE);
}
}
#endregion
#region Size
public Size Size
{
get { return Bounds.Size; }
set
{
// Note: the bounds variable is updated when the resize/move message arrives.
Functions.SetWindowPos(window.WindowHandle, IntPtr.Zero, 0, 0, value.Width, value.Height, SetWindowPosFlags.NOMOVE);
}
}
#endregion
#region ClientRectangle
public Rectangle ClientRectangle
{
get
{
if (client_rectangle.Width == 0)
client_rectangle.Width = 1;
if (client_rectangle.Height == 0)
client_rectangle.Height = 1;
return client_rectangle;
}
set
{
ClientSize = value.Size;
}
}
#endregion
#region ClientSize
public Size ClientSize
{
get
{
return ClientRectangle.Size;
}
set
{
WindowStyle style = (WindowStyle)Functions.GetWindowLong(window.WindowHandle, GetWindowLongOffsets.STYLE);
Win32Rectangle rect = Win32Rectangle.From(value);
Functions.AdjustWindowRect(ref rect, style, false);
Size = new Size(rect.Width, rect.Height);
}
}
#endregion
#region Width
public int Width
{
get { return ClientRectangle.Width; }
set { ClientRectangle = new Rectangle(0, 0, value, Height); }
}
#endregion
#region Height
public int Height
{
get { return ClientRectangle.Height; }
set { ClientRectangle = new Rectangle(0, 0, Width, value); }
}
#endregion
#region X
public int X
{
get { return Location.X; }
set { Location = new Point(value, Y); }
}
#endregion
#region Y
public int Y
{
get { return Location.Y; }
set { Location = new Point(X, value); }
}
#endregion
#region Icon
public Icon Icon
{
get
{
return icon;
}
set
{
if (value != icon)
{
icon = value;
if (window.WindowHandle != IntPtr.Zero)
{
Functions.SendMessage(window.WindowHandle, WindowMessage.SETICON, (IntPtr)0, icon == null ? IntPtr.Zero : value.Handle);
Functions.SendMessage(window.WindowHandle, WindowMessage.SETICON, (IntPtr)1, icon == null ? IntPtr.Zero : value.Handle);
}
IconChanged(this, EventArgs.Empty);
}
}
}
#endregion
#region Focused
public bool Focused
{
get { return focused; }
}
#endregion
#region Title
StringBuilder sb_title = new StringBuilder(256);
public string Title
{
get
{
sb_title.Remove(0, sb_title.Length);
if (Functions.GetWindowText(window.WindowHandle, sb_title, sb_title.Capacity) == 0)
Debug.Print("Failed to retrieve window title (window:{0}, reason:{1}).", window.WindowHandle, Marshal.GetLastWin32Error());
return sb_title.ToString();
}
set
{
if (Title != value)
{
if (!Functions.SetWindowText(window.WindowHandle, value))
Debug.Print("Failed to change window title (window:{0}, new title:{1}, reason:{2}).", window.WindowHandle, value, Marshal.GetLastWin32Error());
TitleChanged(this, EventArgs.Empty);
}
}
}
#endregion
#region Visible
public bool Visible
{
get
{
return Functions.IsWindowVisible(window.WindowHandle);
}
set
{
if (value != Visible)
{
if (value)
{
Functions.ShowWindow(window.WindowHandle, ShowWindowCommand.SHOW);
if (invisible_since_creation)
{
Functions.BringWindowToTop(window.WindowHandle);
Functions.SetForegroundWindow(window.WindowHandle);
}
}
else if (!value)
{
Functions.ShowWindow(window.WindowHandle, ShowWindowCommand.HIDE);
}
VisibleChanged(this, EventArgs.Empty);
}
}
}
#endregion
#region Exists
public bool Exists { get { return exists; } }
#endregion
#region CursorVisible
public bool CursorVisible
{
get { return cursor_visible_count >= 0; } // Not used
set
{
if (value && cursor_visible_count < 0)
{
do
{
cursor_visible_count = Functions.ShowCursor(true);
}
while (cursor_visible_count < 0);
UngrabCursor();
}
else if (!value && cursor_visible_count >= 0)
{
do
{
cursor_visible_count = Functions.ShowCursor(false);
}
while (cursor_visible_count >= 0);
GrabCursor();
}
}
}
#endregion
#region Close
public void Close()
{
Functions.PostMessage(window.WindowHandle, WindowMessage.CLOSE, IntPtr.Zero, IntPtr.Zero);
}
#endregion
#region public WindowState WindowState
public WindowState WindowState
{
get
{
return windowState;
}
set
{
if (WindowState == value)
return;
ShowWindowCommand command = 0;
bool exiting_fullscreen = false;
borderless_maximized_window_state = false;
switch (value)
{
case WindowState.Normal:
command = ShowWindowCommand.RESTORE;
// If we are leaving fullscreen mode we need to restore the border.
if (WindowState == WindowState.Fullscreen)
exiting_fullscreen = true;
break;
case WindowState.Maximized:
// Note: if we use the MAXIMIZE command and the window border is Hidden (i.e. WS_POPUP),
// we will enter fullscreen mode - we don't want that! As a workaround, we'll resize the window
// manually to cover the whole working area of the current monitor.
// Reset state to avoid strange interactions with fullscreen/minimized windows.
ResetWindowState();
if (WindowBorder == WindowBorder.Hidden)
{
IntPtr current_monitor = Functions.MonitorFromWindow(window.WindowHandle, MonitorFrom.Nearest);
MonitorInfo info = new MonitorInfo();
info.Size = MonitorInfo.SizeInBytes;
Functions.GetMonitorInfo(current_monitor, ref info);
previous_bounds = Bounds;
borderless_maximized_window_state = true;
Bounds = info.Work.ToRectangle();
}
else
{
command = ShowWindowCommand.MAXIMIZE;
}
break;
case WindowState.Minimized:
command = ShowWindowCommand.MINIMIZE;
break;
case WindowState.Fullscreen:
// We achieve fullscreen by hiding the window border and sending the MAXIMIZE command.
// We cannot use the WindowState.Maximized directly, as that will not send the MAXIMIZE
// command for windows with hidden borders.
// Reset state to avoid strange side-effects from maximized/minimized windows.
ResetWindowState();
previous_bounds = Bounds;
previous_window_border = WindowBorder;
HideBorder();
command = ShowWindowCommand.MAXIMIZE;
Functions.SetForegroundWindow(window.WindowHandle);
break;
}
if (command != 0)
Functions.ShowWindow(window.WindowHandle, command);
// Restore previous window border or apply pending border change when leaving fullscreen mode.
if (exiting_fullscreen)
{
RestoreBorder();
}
// Restore previous window size/location if necessary
if (command == ShowWindowCommand.RESTORE && previous_bounds != Rectangle.Empty)
{
Bounds = previous_bounds;
previous_bounds = Rectangle.Empty;
}
}
}
#endregion
#region public WindowBorder WindowBorder
public WindowBorder WindowBorder
{
get
{
return windowBorder;
}
set
{
// Do not allow border changes during fullscreen mode.
// Defer them for when we leave fullscreen.
if (WindowState == WindowState.Fullscreen)
{
deferred_window_border = value;
return;
}
if (windowBorder == value)
return;
// We wish to avoid making an invisible window visible just to change the border.
// However, it's a good idea to make a visible window invisible temporarily, to
// avoid garbage caused by the border change.
bool was_visible = Visible;
// To ensure maximized/minimized windows work correctly, reset state to normal,
// change the border, then go back to maximized/minimized.
WindowState state = WindowState;
ResetWindowState();
WindowStyle style = WindowStyle.ClipChildren | WindowStyle.ClipSiblings;
switch (value)
{
case WindowBorder.Resizable:
style |= WindowStyle.OverlappedWindow;
break;
case WindowBorder.Fixed:
style |= WindowStyle.OverlappedWindow &
~(WindowStyle.ThickFrame | WindowStyle.MaximizeBox | WindowStyle.SizeBox);
break;
case WindowBorder.Hidden:
style |= WindowStyle.Popup;
break;
}
// Make sure client size doesn't change when changing the border style.
Size client_size = ClientSize;
Win32Rectangle rect = Win32Rectangle.From(client_size);
Functions.AdjustWindowRectEx(ref rect, style, false, ParentStyleEx);
// This avoids leaving garbage on the background window.
if (was_visible)
Visible = false;
Functions.SetWindowLong(window.WindowHandle, GetWindowLongOffsets.STYLE, (IntPtr)(int)style);
Functions.SetWindowPos(window.WindowHandle, IntPtr.Zero, 0, 0, rect.Width, rect.Height,
SetWindowPosFlags.NOMOVE | SetWindowPosFlags.NOZORDER |
SetWindowPosFlags.FRAMECHANGED);
// Force window to redraw update its borders, but only if it's
// already visible (invisible windows will change borders when
// they become visible, so no need to make them visiable prematurely).
if (was_visible)
Visible = true;
WindowState = state;
WindowBorderChanged(this, EventArgs.Empty);
}
}
#endregion
#region PointToClient
public Point PointToClient(Point point)
{
if (!Functions.ScreenToClient(window.WindowHandle, ref point))
throw new InvalidOperationException(String.Format(
"Could not convert point {0} from screen to client coordinates. Windows error: {1}",
point.ToString(), Marshal.GetLastWin32Error()));
return point;
}
#endregion
#region PointToScreen
public Point PointToScreen(Point point)
{
if (!Functions.ClientToScreen(window.WindowHandle, ref point))
throw new InvalidOperationException(String.Format(
"Could not convert point {0} from screen to client coordinates. Windows error: {1}",
point.ToString(), Marshal.GetLastWin32Error()));
return point;
}
#endregion
#region Events
public event EventHandler<EventArgs> Move = delegate { };
public event EventHandler<EventArgs> Resize = delegate { };
public event EventHandler<System.ComponentModel.CancelEventArgs> Closing = delegate { };
public event EventHandler<EventArgs> Closed = delegate { };
public event EventHandler<EventArgs> Disposed = delegate { };
public event EventHandler<EventArgs> IconChanged = delegate { };
public event EventHandler<EventArgs> TitleChanged = delegate { };
public event EventHandler<EventArgs> VisibleChanged = delegate { };
public event EventHandler<EventArgs> FocusedChanged = delegate { };
public event EventHandler<EventArgs> WindowBorderChanged = delegate { };
public event EventHandler<EventArgs> WindowStateChanged = delegate { };
public event EventHandler<OpenTK.Input.KeyboardKeyEventArgs> KeyDown = delegate { };
public event EventHandler<KeyPressEventArgs> KeyPress = delegate { };
public event EventHandler<OpenTK.Input.KeyboardKeyEventArgs> KeyUp = delegate { };
public event EventHandler<EventArgs> MouseEnter = delegate { };
public event EventHandler<EventArgs> MouseLeave = delegate { };
#endregion
#endregion
#region INativeGLWindow Members
#region public void ProcessEvents()
private int ret;
MSG msg;
public void ProcessEvents()
{
while (!IsIdle)
{
ret = Functions.GetMessage(ref msg, window.WindowHandle, 0, 0);
if (ret == -1)
{
throw new PlatformException(String.Format(
"An error happened while processing the message queue. Windows error: {0}",
Marshal.GetLastWin32Error()));
}
Functions.TranslateMessage(ref msg);
Functions.DispatchMessage(ref msg);
}
}
#endregion
#region public IInputDriver InputDriver
public IInputDriver InputDriver
{
get { return this; }
}
#endregion
#region public IWindowInfo WindowInfo
public IWindowInfo WindowInfo
{
get { return child_window; }
}
#endregion
#endregion
#region IInputDriver Members
public void Poll()
{
joystick_driver.Poll();
}
#endregion
#region IKeyboardDriver Members
public IList<KeyboardDevice> Keyboard
{
get { return keyboards; }
}
public KeyboardState GetState()
{
throw new NotImplementedException();
}
public KeyboardState GetState(int index)
{
throw new NotImplementedException();
}
#endregion
#region IMouseDriver Members
public IList<MouseDevice> Mouse
{
get { return mice; }
}
#endregion
#region IJoystickDriver Members
public IList<JoystickDevice> Joysticks
{
get { return joystick_driver.Joysticks; }
}
#endregion
#region IDisposable Members
public void Dispose()
{
this.Dispose(true);
GC.SuppressFinalize(this);
}
void Dispose(bool calledManually)
{
if (!disposed)
{
if (calledManually)
{
// Safe to clean managed resources
DestroyWindow();
if (Icon != null)
Icon.Dispose();
}
else
{
Debug.Print("[Warning] INativeWindow leaked ({0}). Did you forget to call INativeWindow.Dispose()?", this);
}
Disposed(this, EventArgs.Empty);
disposed = true;
}
}
~WinGLNative()
{
Dispose(false);
}
#endregion
}
}