private IntPtr MouseHookProc(int code, IntPtr wParam, IntPtr lParam)
{
try
{
if (code >= 0 && IsDragging)
{
if ((Win32.MouseMessages)wParam == Win32.MouseMessages.WM_LBUTTONDOWN)
{
Win32.MSLLHOOKSTRUCT hookStruct = (Win32.MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(Win32.MSLLHOOKSTRUCT));
Console.WriteLine("DOWN: " + hookStruct.pt.x + ", " + hookStruct.pt.y);
}
else if ((Win32.MouseMessages)wParam == Win32.MouseMessages.WM_MOUSEMOVE)
{
Win32.MSLLHOOKSTRUCT hookStruct = (Win32.MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(Win32.MSLLHOOKSTRUCT));
Console.WriteLine("MOVE: " + hookStruct.pt.x + ", " + hookStruct.pt.y);
VisualProvider?.UpdateVisualPosition(new Point(hookStruct.pt.x, hookStruct.pt.y));
}
else if ((Win32.MouseMessages)wParam == Win32.MouseMessages.WM_LBUTTONUP)
{
Win32.MSLLHOOKSTRUCT hookStruct = (Win32.MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(Win32.MSLLHOOKSTRUCT));
Console.WriteLine("UP: " + hookStruct.pt.x + ", " + hookStruct.pt.y);
DragRelease(new Point(hookStruct.pt.x, hookStruct.pt.y));
}
}
}
catch (Exception ex)
{
Debug.WriteLine("MouseHookProc: " + ex.ToString());
}
return(Win32.CallNextHookEx(hMouseHook, code, wParam, lParam));
}
private async Task DragRelease(Point dropPoint)
{
this.IsDragging = false;
VisualProvider?.UpdateVisualPosition(dropPoint);
// Fire relevant callback function if dropped in a dropSurface
foreach (var dropSurface in dropSurfaces)
{
if (dropSurface.IsMouseOver)
{
var dpi = VisualTreeHelper.GetDpi(dropSurface);
var scaledPoint = new Point(dropPoint.X / dpi.DpiScaleX, dropPoint.Y / dpi.DpiScaleY);
var dropSurfaceScreenPoint = dropSurface.PointToScreen(new Point(0, 0));
var relativePoint = new Point(scaledPoint.X - dropSurfaceScreenPoint.X,
scaledPoint.Y - dropSurfaceScreenPoint.Y);
var dropArgs = new DropEventArgs
{
Result = DragDropResult.DroppedToExistingWindow,
Data = this.dragObject,
RelativeMousePosition = relativePoint,
DropSurface = dropSurface,
};
dropSurfaceData[dropSurface].DropCallback(dropArgs);
VisualProvider?.CloseVisual(dropArgs);
dragDropTcs.SetResult(dropArgs);
return;
}
}
// Fire event if dropped was not in any dropSurface
var newWindowDropArgs = new DropEventArgs
{
Result = DragDropResult.NewWindowRequested,
Data = this.dragObject,
DropSurface = null,
RelativeMousePosition = dropPoint,
};
if (VisualProvider != null)
{
var newWindowPosition = await VisualProvider.CloseVisual(newWindowDropArgs);
newWindowDropArgs.RelativeMousePosition = newWindowPosition;
}
dragDropTcs.SetResult(newWindowDropArgs);
}
