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MainWindow.xaml.cs
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MainWindow.xaml.cs
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// ---------------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// The MIT License (MIT)
//
// 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.
// ---------------------------------------------------------------------------------
using CaptureSampleCore;
using Composition.WindowsRuntimeHelpers;
using System;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Linq;
using System.Numerics;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Interop;
using Windows.Foundation.Metadata;
using Windows.Graphics.Capture;
using Windows.UI.Composition;
namespace WPFCaptureSample
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private IntPtr hwnd;
private Compositor compositor;
private CompositionTarget target;
private ContainerVisual root;
private BasicSampleApplication sample;
private ObservableCollection<Process> processes;
private ObservableCollection<MonitorInfo> monitors;
public MainWindow()
{
InitializeComponent();
#if DEBUG
// Force graphicscapture.dll to load.
var picker = new GraphicsCapturePicker();
#endif
}
private async void PickerButton_Click(object sender, RoutedEventArgs e)
{
StopCapture();
WindowComboBox.SelectedIndex = -1;
MonitorComboBox.SelectedIndex = -1;
await StartPickerCaptureAsync();
}
private void PrimaryMonitorButton_Click(object sender, RoutedEventArgs e)
{
StopCapture();
WindowComboBox.SelectedIndex = -1;
MonitorComboBox.SelectedIndex = -1;
StartPrimaryMonitorCapture();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
var interopWindow = new WindowInteropHelper(this);
hwnd = interopWindow.Handle;
var presentationSource = PresentationSource.FromVisual(this);
double dpiX = 1.0;
double dpiY = 1.0;
if (presentationSource != null)
{
dpiX = presentationSource.CompositionTarget.TransformToDevice.M11;
dpiY = presentationSource.CompositionTarget.TransformToDevice.M22;
}
var controlsWidth = (float)(ControlsGrid.ActualWidth * dpiX);
InitComposition(controlsWidth);
InitWindowList();
InitMonitorList();
}
private void StopButton_Click(object sender, RoutedEventArgs e)
{
StopCapture();
WindowComboBox.SelectedIndex = -1;
MonitorComboBox.SelectedIndex = -1;
}
private void WindowComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var comboBox = (ComboBox)sender;
var process = (Process)comboBox.SelectedItem;
if (process != null)
{
StopCapture();
MonitorComboBox.SelectedIndex = -1;
var hwnd = process.MainWindowHandle;
try
{
StartHwndCapture(hwnd);
}
catch (Exception)
{
Debug.WriteLine($"Hwnd 0x{hwnd.ToInt32():X8} is not valid for capture!");
processes.Remove(process);
comboBox.SelectedIndex = -1;
}
}
}
private void MonitorComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var comboBox = (ComboBox)sender;
var monitor = (MonitorInfo)comboBox.SelectedItem;
if (monitor != null)
{
StopCapture();
WindowComboBox.SelectedIndex = -1;
var hmon = monitor.Hmon;
try
{
StartHmonCapture(hmon);
}
catch (Exception)
{
Debug.WriteLine($"Hmon 0x{hmon.ToInt32():X8} is not valid for capture!");
monitors.Remove(monitor);
comboBox.SelectedIndex = -1;
}
}
}
private void InitComposition(float controlsWidth)
{
// Create the compositor.
compositor = new Compositor();
// Create a target for the window.
target = compositor.CreateDesktopWindowTarget(hwnd, true);
// Attach the root visual.
root = compositor.CreateContainerVisual();
root.RelativeSizeAdjustment = Vector2.One;
root.Size = new Vector2(-controlsWidth, 0);
root.Offset = new Vector3(controlsWidth, 0, 0);
target.Root = root;
// Setup the rest of the sample application.
sample = new BasicSampleApplication(compositor);
root.Children.InsertAtTop(sample.Visual);
}
private void InitWindowList()
{
if (ApiInformation.IsApiContractPresent(typeof(Windows.Foundation.UniversalApiContract).FullName, 8))
{
var processesWithWindows = from p in Process.GetProcesses()
where !string.IsNullOrWhiteSpace(p.MainWindowTitle) && WindowEnumerationHelper.IsWindowValidForCapture(p.MainWindowHandle)
select p;
processes = new ObservableCollection<Process>(processesWithWindows);
WindowComboBox.ItemsSource = processes;
}
else
{
WindowComboBox.IsEnabled = false;
}
}
private void InitMonitorList()
{
if (ApiInformation.IsApiContractPresent(typeof(Windows.Foundation.UniversalApiContract).FullName, 8))
{
monitors = new ObservableCollection<MonitorInfo>(MonitorEnumerationHelper.GetMonitors());
MonitorComboBox.ItemsSource = monitors;
}
else
{
MonitorComboBox.IsEnabled = false;
PrimaryMonitorButton.IsEnabled = false;
}
}
private async Task StartPickerCaptureAsync()
{
var picker = new GraphicsCapturePicker();
picker.SetWindow(hwnd);
GraphicsCaptureItem item = await picker.PickSingleItemAsync();
if (item != null)
{
sample.StartCaptureFromItem(item);
}
}
private void StartHwndCapture(IntPtr hwnd)
{
GraphicsCaptureItem item = CaptureHelper.CreateItemForWindow(hwnd);
if (item != null)
{
sample.StartCaptureFromItem(item);
}
}
private void StartHmonCapture(IntPtr hmon)
{
GraphicsCaptureItem item = CaptureHelper.CreateItemForMonitor(hmon);
if (item != null)
{
sample.StartCaptureFromItem(item);
}
}
private void StartPrimaryMonitorCapture()
{
MonitorInfo monitor = (from m in MonitorEnumerationHelper.GetMonitors()
where m.IsPrimary
select m).First();
StartHmonCapture(monitor.Hmon);
}
private void StopCapture()
{
sample.StopCapture();
}
}
}