public SpecialKeyState CheckModifiers()
{
SpecialKeyState state = new SpecialKeyState();
if ((InterceptKeys.GetKeyState(VK_SHIFT) & 0x8000) != 0)
{
//SHIFT is pressed
state.ShiftPressed = true;
}
if ((InterceptKeys.GetKeyState(VK_CONTROL) & 0x8000) != 0)
{
//CONTROL is pressed
state.CtrlPressed = true;
}
if ((InterceptKeys.GetKeyState(VK_ALT) & 0x8000) != 0)
{
//ALT is pressed
state.AltPressed = true;
}
if ((InterceptKeys.GetKeyState(VK_WIN) & 0x8000) != 0)
{
//WIN is pressed
state.WinPressed = true;
}
return(state);
}
private GlobalHotkey()
{
// We have to store the LowLevelKeyboardProc, so that it is not garbage collected runtime
hookedLowLevelKeyboardProc = LowLevelKeyboardProc;
// Set the hook
hookId = InterceptKeys.SetHook(hookedLowLevelKeyboardProc);
}
private bool ModifierKeyPressed(Key key)
{
const int keyPressed = 0x8000;
var pressed = Convert.ToBoolean(InterceptKeys.GetKeyState(key) & keyPressed);
return(pressed);
}
private IntPtr LowLevelKeyboardProc(int nCode, UIntPtr wParam, IntPtr lParam)
{
bool continues = true;
if (nCode >= 0)
{
if (wParam.ToUInt32() == (int)KeyEvent.WM_KEYDOWN ||
wParam.ToUInt32() == (int)KeyEvent.WM_KEYUP ||
wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYDOWN ||
wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYUP)
{
if (hookedKeyboardCallback != null)
{
continues = hookedKeyboardCallback((KeyEvent)wParam.ToUInt32(), Marshal.ReadInt32(lParam), CheckModifiers());
}
}
}
if (continues)
{
return(InterceptKeys.CallNextHookEx(hookId, nCode, wParam, lParam));
}
return((IntPtr)1);
}
public void Dispose()
{
InterceptKeys.UnhookWindowsHookEx(hookId);
}
private IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam)
{
const int pressed = 0; // HC_ACTION
IntPtr intercepted = (IntPtr)1;
if (nCode == pressed)
{
var m = (WindowsMessage)wParam.ToInt32();
var info = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(KBDLLHOOKSTRUCT));
if (m == WindowsMessage.KEYDOWN || m == WindowsMessage.SYSKEYDOWN)
{
var pressedHotkey = new HotkeyModel(info.vkCode);
if (pressedHotkey.Key != Key.None &&
pressedHotkey.ModifierKeys.Length != 0)
{
if (!Capturing)
{
if (_hotkeys.ContainsKey(pressedHotkey))
{
_modifierPressed = true;
var action = _hotkeys[pressedHotkey];
action();
return(intercepted);
}
else
{
return(InterceptKeys.CallNextHookEx(_hookID, nCode, wParam, lParam));
}
}
else if (HotkeyCaptured != null)
{
_modifierPressed = true;
var args = new HotkeyCapturedEventArgs
{
Hotkey = pressedHotkey,
Available = !_hotkeys.ContainsKey(pressedHotkey),
};
HotkeyCaptured.Invoke(this, args);
return(intercepted);
}
else
{
return(InterceptKeys.CallNextHookEx(_hookID, nCode, wParam, lParam));
}
}
else
{
return(InterceptKeys.CallNextHookEx(_hookID, nCode, wParam, lParam));
}
}
else if (m == WindowsMessage.KEYUP)
{
// if win+r is pressed, windows star menu will still popup
// so we need to discard keyup event
if (_modifierPressed)
{
_modifierPressed = false;
if (info.vkCode == Key.LWIN || info.vkCode == Key.RWIN || info.vkCode == Key.WIN)
{
return(intercepted);
}
else
{
return(InterceptKeys.CallNextHookEx(_hookID, nCode, wParam, lParam));
}
}
else
{
return(InterceptKeys.CallNextHookEx(_hookID, nCode, wParam, lParam));
}
}
else
{
return(InterceptKeys.CallNextHookEx(_hookID, nCode, wParam, lParam));
}
}
else
{
return(InterceptKeys.CallNextHookEx(_hookID, nCode, wParam, lParam));
}
}
private GlobalHotkey()
{
_hotkeys = new Dictionary <HotkeyModel, Action>();
_hookID = InterceptKeys.SetHook(LowLevelKeyboardProc);
}
