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Add hotkey basic handling

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This commit is contained in:
Théo Marchal 2021-08-09 00:51:06 +02:00
parent d85449e3aa
commit 6b192fc978
1 changed files with 97 additions and 0 deletions
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97
MainWindow.xaml.cs
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@ -8,6 +8,9 @@ using System.Windows;
using System.Windows.Controls;
using System.Windows.Threading;
using System.Runtime.InteropServices;
using System.Windows.Interop;
using MPDCtrl.Models;
namespace unison
@ -190,6 +193,11 @@ namespace unison
await _mpd.MpdSetConsume(!_currentConsume);
}
private async void ChangeVolume(int value)
{
await _mpd.MpdSetVolume(value);
}
private void Snapcast_Clicked(object sender, RoutedEventArgs e)
{
if (!_snapcastStarted)
@ -212,5 +220,94 @@ namespace unison
if (_snapcastStarted)
_snapcast.Kill();
}
// hotkeys handling
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
private const int HOTKEY_ID = 9000;
// modifiers
private const uint MOD_NONE = 0x0000;
private const uint MOD_ALT = 0x0001;
private const uint MOD_CONTROL = 0x0002;
private const uint MOD_SHIFT = 0x0004;
private const uint MOD_WIN = 0x0008;
// reference => https://docs.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes
private const uint VK_MEDIA_PREV_TRACK = 0xB1;
private const uint VK_MEDIA_NEXT_TRACK = 0xB0;
private const uint VK_MEDIA_PLAY_PAUSE = 0xB3;
private const uint VK_VOLUME_UP = 0xAF;
private const uint VK_VOLUME_DOWN = 0xAE;
private IntPtr _windowHandle;
private HwndSource _source;
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
_windowHandle = new WindowInteropHelper(this).Handle;
_source = HwndSource.FromHwnd(_windowHandle);
_source.AddHook(HwndHook);
RegisterHotKey(_windowHandle, HOTKEY_ID, MOD_CONTROL, VK_MEDIA_PREV_TRACK);
RegisterHotKey(_windowHandle, HOTKEY_ID, MOD_CONTROL, VK_MEDIA_NEXT_TRACK);
RegisterHotKey(_windowHandle, HOTKEY_ID, MOD_CONTROL /*| MOD_ALT*/, VK_MEDIA_PLAY_PAUSE);
RegisterHotKey(_windowHandle, HOTKEY_ID, MOD_CONTROL, VK_VOLUME_UP);
RegisterHotKey(_windowHandle, HOTKEY_ID, MOD_CONTROL, VK_VOLUME_DOWN);
}
private IntPtr HwndHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
const int WM_HOTKEY = 0x0312;
switch (msg)
{
case WM_HOTKEY:
switch (wParam.ToInt32())
{
case HOTKEY_ID:
int vkey = (((int)lParam >> 16) & 0xFFFF);
if (vkey == VK_MEDIA_NEXT_TRACK)
{
Next_Clicked(null, null);
}
else if (vkey == VK_MEDIA_PREV_TRACK)
{
Previous_Clicked(null, null);
}
else if (vkey == VK_VOLUME_DOWN)
{
_currentVolume--;
ChangeVolume(_currentVolume);
}
else if (vkey == VK_VOLUME_UP)
{
_currentVolume++;
ChangeVolume(_currentVolume);
}
else if (vkey == VK_MEDIA_PLAY_PAUSE)
{
Pause_Clicked(null, null);
}
handled = true;
break;
}
break;
}
return IntPtr.Zero;
}
protected override void OnClosed(EventArgs e)
{
_source.RemoveHook(HwndHook);
UnregisterHotKey(_windowHandle, HOTKEY_ID);
base.OnClosed(e);
}
}
}