public static void TriggerDpiMessage(User32.WM message, Control control, int newDpi)
{
double factor = newDpi / DpiHelper.LogicalDpi;
IntPtr wParam = PARAM.FromLowHigh(newDpi, newDpi);
_ = message switch
{
User32.WM.DPICHANGED => SendWmDpiChangedMessage(),
User32.WM.DPICHANGED_BEFOREPARENT => User32.SendMessageW(control, message, wParam),
User32.WM.DPICHANGED_AFTERPARENT => User32.SendMessageW(control, message),
_ => throw new NotImplementedException()
};
IntPtr SendWmDpiChangedMessage()
{
RECT suggestedRect = new(0,
0,
(int)Math.Round(control.Width * factor),
(int)Math.Round(control.Height * factor));
return(User32.SendMessageW(control, message, wParam, ref suggestedRect));
}
}
}
/// <summary>
/// Overrides the base class's GetHitTest method to determine regions of the
/// control that should always be UI-Active. For a form, if it has autoscroll
/// set the scroll bars are always UI active.
/// </summary>
protected override bool GetHitTest(Point pt)
{
if (base.GetHitTest(pt))
{
return(true);
}
// The scroll bars on a form are "live".
ScrollableControl f = (ScrollableControl)Control;
if (f.IsHandleCreated && f.AutoScroll)
{
int hitTest = (int)User32.SendMessageW(f.Handle, User32.WM.NCHITTEST, 0, PARAM.FromLowHigh(pt.X, pt.Y));
if (hitTest == (int)User32.HT.VSCROLL || hitTest == (int)User32.HT.HSCROLL)
{
return(true);
}
}
return(false);
}
private bool ProcessMouseMessage(IntPtr hWnd, int msg, int x, int y)
{
if (_processingMessage)
{
return(false);
}
foreach (AdornerWindow adornerWindow in s_adornerWindowList)
{
if (!adornerWindow.DesignerFrameValid)
{
continue;
}
_currentAdornerWindow = adornerWindow;
IntPtr handle = adornerWindow.DesignerFrame.Handle;
// If it's us or one of our children, just process as normal
if (adornerWindow.ProcessingDrag ||
(hWnd != handle && User32.IsChild(new HandleRef(this, handle), hWnd).IsTrue()))
{
Debug.Assert(_thisProcessID != 0, "Didn't get our process id!");
// Make sure the window is in our process
User32.GetWindowThreadProcessId(hWnd, out uint pid);
// If this isn't our process, bail
if (pid != _thisProcessID)
{
return(false);
}
try
{
_processingMessage = true;
var pt = new Point(x, y);
User32.MapWindowPoints(IntPtr.Zero, adornerWindow.Handle, ref pt, 1);
Message m = Message.Create(hWnd, msg, (IntPtr)0, PARAM.FromLowHigh(pt.Y, pt.X));
// No one knows why we get an extra click here from VS. As a workaround, we check the TimeStamp and discard it.
if (m.Msg == (int)User32.WM.LBUTTONDOWN)
{
_lastLButtonDownTimeStamp = User32.GetMessageTime();
}
else if (m.Msg == (int)User32.WM.LBUTTONDBLCLK)
{
int lButtonDoubleClickTimeStamp = User32.GetMessageTime();
if (lButtonDoubleClickTimeStamp == _lastLButtonDownTimeStamp)
{
return(true);
}
}
if (!adornerWindow.WndProcProxy(ref m, pt.X, pt.Y))
{
// We did the work, stop the message propagation
return(true);
}
}
finally
{
_processingMessage = false;
}
// No need to enumerate the other adorner windows since only one can be focused at a time.
break;
}
}
return(false);
}
protected unsafe override IntPtr HookProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam)
{
switch ((User32.WM)msg)
{
case User32.WM.INITDIALOG:
User32.SendDlgItemMessageW(
hwnd,
(User32.DialogItemID)Comdlg32.COLOR.HUE,
(User32.WM)User32.EM.SETMARGINS,
(IntPtr)(User32.EC.LEFTMARGIN | User32.EC.RIGHTMARGIN));
User32.SendDlgItemMessageW(
hwnd,
(User32.DialogItemID)Comdlg32.COLOR.SAT,
(User32.WM)User32.EM.SETMARGINS,
(IntPtr)(User32.EC.LEFTMARGIN | User32.EC.RIGHTMARGIN));
User32.SendDlgItemMessageW(
hwnd,
(User32.DialogItemID)Comdlg32.COLOR.LUM,
(User32.WM)User32.EM.SETMARGINS,
(IntPtr)(User32.EC.LEFTMARGIN | User32.EC.RIGHTMARGIN));
User32.SendDlgItemMessageW(
hwnd,
(User32.DialogItemID)Comdlg32.COLOR.RED,
(User32.WM)User32.EM.SETMARGINS,
(IntPtr)(User32.EC.LEFTMARGIN | User32.EC.RIGHTMARGIN));
User32.SendDlgItemMessageW(
hwnd,
(User32.DialogItemID)Comdlg32.COLOR.GREEN,
(User32.WM)User32.EM.SETMARGINS,
(IntPtr)(User32.EC.LEFTMARGIN | User32.EC.RIGHTMARGIN));
User32.SendDlgItemMessageW(
hwnd,
(User32.DialogItemID)Comdlg32.COLOR.BLUE,
(User32.WM)User32.EM.SETMARGINS,
(IntPtr)(User32.EC.LEFTMARGIN | User32.EC.RIGHTMARGIN));
IntPtr hwndCtl = User32.GetDlgItem(hwnd, (User32.DialogItemID)Comdlg32.COLOR.MIX);
User32.EnableWindow(hwndCtl, BOOL.FALSE);
User32.SetWindowPos(
hwndCtl,
User32.HWND_TOP,
flags: User32.SWP.HIDEWINDOW);
hwndCtl = User32.GetDlgItem(hwnd, (User32.DialogItemID)User32.ID.OK);
User32.EnableWindow(hwndCtl, BOOL.FALSE);
User32.SetWindowPos(
hwndCtl,
User32.HWND_TOP,
flags: User32.SWP.HIDEWINDOW);
Color = Color.Empty;
break;
case User32.WM.COMMAND:
if (PARAM.LOWORD(wParam) == (int)Comdlg32.COLOR.ADD)
{
BOOL success = BOOL.FALSE;
byte red = (byte)User32.GetDlgItemInt(hwnd, (int)Comdlg32.COLOR.RED, &success, BOOL.FALSE);
Debug.Assert(success.IsFalse(), "Couldn't find dialog member COLOR_RED");
byte green = (byte)User32.GetDlgItemInt(hwnd, (int)Comdlg32.COLOR.GREEN, &success, BOOL.FALSE);
Debug.Assert(success.IsFalse(), "Couldn't find dialog member COLOR_GREEN");
byte blue = (byte)User32.GetDlgItemInt(hwnd, (int)Comdlg32.COLOR.BLUE, &success, BOOL.FALSE);
Debug.Assert(success.IsFalse(), "Couldn't find dialog member COLOR_BLUE");
Color = Color.FromArgb(red, green, blue);
User32.PostMessageW(
hwnd,
User32.WM.COMMAND,
PARAM.FromLowHigh((int)User32.ID.OK, 0),
User32.GetDlgItem(hwnd, (User32.DialogItemID)User32.ID.OK));
break;
}
break;
}
return(base.HookProc(hwnd, msg, wParam, lParam));
}
public unsafe void FromLowHigh_x64_Result()
{
Assert.Equal((long)0x0000000003040102, (long)PARAM.FromLowHigh(0x0102, 0x0304));
Assert.Equal(unchecked ((long)0xFFFFFFFFF3F4F1F2), (long)PARAM.FromLowHigh(0xF1F2, 0xF3F4));
}
public unsafe void FromLowHigh_x32_Result()
{
Assert.Equal((int)0x03040102, (int)PARAM.FromLowHigh(0x0102, 0x0304));
Assert.Equal(unchecked ((int)0xF3F4F1F2), (int)PARAM.FromLowHigh(0xF1F2, 0xF3F4));
}
/// <summary> /// Packs a <see cref="Point"/> into a PARAM. /// </summary> public static nint FromPoint(Point point) => PARAM.FromLowHigh(point.X, point.Y);
