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Fix #190

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This commit is contained in:
Phyxion
2020-01-17 13:01:37 +01:00
parent 88530e48c6
commit f33768240e
1 changed files with 54 additions and 33 deletions
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LibreHardwareMonitor/UI/ShowDesktop.cs
+54 -33
View File
@@ -9,30 +9,71 @@ using System.Windows.Forms;
namespace LibreHardwareMonitor.UI
{
public class ShowDesktop
public class ShowDesktop : IDisposable
{
public delegate void ShowDesktopChangedEventHandler(bool showDesktop);
private event ShowDesktopChangedEventHandler ShowDesktopChangedEvent;
private readonly NativeWindow _referenceWindow;
private readonly string _referenceWindowCaption = "LibreHardwareMonitorShowDesktopReferenceWindow";
private readonly System.Threading.Timer _timer;
private bool _showDesktop;
private readonly string _referenceWindowCaption = "LibreHardwareMonitorShowDesktopReferenceWindow";
/// <summary>
/// Prevents a default instance of the <see cref="ShowDesktop" /> class from being created.
/// </summary>
private ShowDesktop()
{
// create a reference window to detect show desktop
NativeWindow referenceWindow = new NativeWindow();
// Create a reference window to detect show desktop
_referenceWindow = new NativeWindow();
CreateParams cp = new CreateParams { ExStyle = GadgetWindow.WS_EX_TOOLWINDOW, Caption = _referenceWindowCaption };
referenceWindow.CreateHandle(cp);
NativeMethods.SetWindowPos(
referenceWindow.Handle,
GadgetWindow.HWND_BOTTOM, 0, 0, 0, 0, GadgetWindow.SWP_NOMOVE |
GadgetWindow.SWP_NOSIZE | GadgetWindow.SWP_NOACTIVATE |
GadgetWindow.SWP_NOSENDCHANGING);
_referenceWindow.CreateHandle(cp);
NativeMethods.SetWindowPos(_referenceWindow.Handle,
GadgetWindow.HWND_BOTTOM,
0,
0,
0,
0,
GadgetWindow.SWP_NOMOVE |
GadgetWindow.SWP_NOSIZE |
GadgetWindow.SWP_NOACTIVATE |
GadgetWindow.SWP_NOSENDCHANGING);
// start a repeated timer to detect "Show Desktop" events
_timer = new System.Threading.Timer(OnTimer, null, System.Threading.Timeout.Infinite, System.Threading.Timeout.Infinite);
}
public delegate void ShowDesktopChangedEventHandler(bool showDesktop);
private event ShowDesktopChangedEventHandler ShowDesktopChangedEvent;
// notify when the "show desktop" mode is changed
public event ShowDesktopChangedEventHandler ShowDesktopChanged
{
add
{
// start the monitor timer when someone is listening
if (ShowDesktopChangedEvent == null)
StartTimer();
ShowDesktopChangedEvent += value;
}
remove
{
ShowDesktopChangedEvent -= value;
// stop the monitor timer if nobody is interested
if (ShowDesktopChangedEvent == null)
StopTimer();
}
}
public static ShowDesktop Instance { get; } = new ShowDesktop();
/// <inheritdoc />
public void Dispose()
{
_timer?.Dispose();
_referenceWindow.ReleaseHandle();
}
private void StartTimer()
{
_timer.Change(0, 200);
@@ -68,6 +109,7 @@ namespace LibreHardwareMonitor.UI
}
}
}
return IntPtr.Zero;
}
@@ -95,27 +137,6 @@ namespace LibreHardwareMonitor.UI
}
}
public static ShowDesktop Instance { get; } = new ShowDesktop();
// notify when the "show desktop" mode is changed
public event ShowDesktopChangedEventHandler ShowDesktopChanged
{
add
{
// start the monitor timer when someone is listening
if (ShowDesktopChangedEvent == null)
StartTimer();
ShowDesktopChangedEvent += value;
}
remove
{
ShowDesktopChangedEvent -= value;
// stop the monitor timer if nobody is interested
if (ShowDesktopChangedEvent == null)
StopTimer();
}
}
private static class NativeMethods
{
private const string USER = "user32.dll";