private void Hook_OnMouseActivity(object sender, CaptureMouseEventArgs e)
{
if (_captureState == CaptureState.Desktop_HotkeyPressedAwaitingMouseDown && (e.Button & MouseButtons.Left) != 0)
{
ShowCaptureForm(e.Location);
}
else if (_captureState == CaptureState.Touchpad_HotkeyPressed)
{
ShowCaptureForm(e.Location);
_captureState = CaptureState.Touchpad_Dragging;
_hook.SuppressLeftMouseDownOnce = true;
}
else if (_captureState == CaptureState.Touchpad_Dragging)
{
UpdateCaptureForm(e.Location);
if (e.LeftButtonUp)
{
CommitCaptureForm();
_selectedWindowIndicator.Hide();
}
}
else if (_captureState == CaptureState.Desktop_MouseDownAwaitingMouseUp)
{
UpdateCaptureForm(e.Location);
if (e.LeftButtonUp)
{
CommitCaptureForm();
}
}
}
/// <summary>
/// A callback function which will be called every time a mouse activity detected.
/// </summary>
/// <param name="nCode">
/// [in] Specifies whether the hook procedure must process the message.
/// If nCode is HC_ACTION, the hook procedure must process the message.
/// If nCode is less than zero, the hook procedure must pass the message to the
/// CallNextHookEx function without further processing and must return the
/// value returned by CallNextHookEx.
/// </param>
/// <param name="wParam">
/// [in] Specifies whether the message was sent by the current thread.
/// If the message was sent by the current thread, it is nonzero; otherwise, it is zero.
/// </param>
/// <param name="lParam">
/// [in] Pointer to a CWPSTRUCT structure that contains details about the message.
/// </param>
/// <returns>
/// If nCode is less than zero, the hook procedure must return the value returned by CallNextHookEx.
/// If nCode is greater than or equal to zero, it is highly recommended that you call CallNextHookEx
/// and return the value it returns; otherwise, other applications that have installed WH_CALLWNDPROC
/// hooks will not receive hook notifications and may behave incorrectly as a result. If the hook
/// procedure does not call CallNextHookEx, the return value should be zero.
/// </returns>
private int MouseHookProc(int nCode, int wParam, IntPtr lParam)
{
bool leftButtonUp = false;
bool suppressMouseThisTime = false;
// if ok and someone listens to our events
if ((nCode >= 0) && (OnMouseActivity != null))
{
//Marshall the data from callback.
MouseLLHookStruct mouseHookStruct = (MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLLHookStruct));
//detect button clicked
MouseButtons button = MouseButtons.None;
short mouseDelta = 0;
switch (wParam)
{
case WM_LBUTTONDOWN:
//case WM_LBUTTONDBLCLK:
button = MouseButtons.Left;
if (SuppressLeftMouseDownOnce)
{
suppressMouseThisTime = true;
SuppressLeftMouseDownOnce = false;
}
break;
case WM_LBUTTONUP:
leftButtonUp = true;
break;
case WM_RBUTTONDOWN:
case WM_RBUTTONUP:
//case WM_RBUTTONDBLCLK:
button = MouseButtons.Right;
break;
case WM_MOUSEWHEEL:
//If the message is WM_MOUSEWHEEL, the high-order word of mouseData member is the wheel delta.
//One wheel click is defined as WHEEL_DELTA, which is 120.
//(value >> 16) & 0xffff; retrieves the high-order word from the given 32-bit value
mouseDelta = (short)((mouseHookStruct.mouseData >> 16) & 0xffff);
//TODO: X BUTTONS (I havent them so was unable to test)
//If the message is WM_XBUTTONDOWN, WM_XBUTTONUP, WM_XBUTTONDBLCLK, WM_NCXBUTTONDOWN, WM_NCXBUTTONUP,
//or WM_NCXBUTTONDBLCLK, the high-order word specifies which X button was pressed or released,
//and the low-order word is reserved. This value can be one or more of the following values.
//Otherwise, mouseData is not used.
break;
}
//double clicks
int clickCount = 0;
if (button != MouseButtons.None)
{
if (wParam == WM_LBUTTONDBLCLK || wParam == WM_RBUTTONDBLCLK)
{
clickCount = 2;
}
else
{
clickCount = 1;
}
}
//generate event
var e = new CaptureMouseEventArgs(
button,
clickCount,
mouseHookStruct.pt.x,
mouseHookStruct.pt.y,
mouseDelta,
leftButtonUp
);
//raise it
OnMouseActivity(this, e);
}
if (suppressMouseThisTime)
{
return(1);
}
else
{
//call next hook
return(CallNextHookEx(hMouseHook, nCode, wParam, lParam));
}
}