protected override LResult WindowProcedure(WindowHandle window, MessageType message, WParam wParam, LParam lParam)
{
switch (message)
{
case MessageType.Create:
window.SetWindowLong(0, IntPtr.Zero); // on/off flag
return(0);
case MessageType.KeyDown:
// Send most key presses to the parent window
if ((VirtualKey)wParam != VirtualKey.Return && (VirtualKey)wParam != VirtualKey.Space)
{
window.GetParent().SendMessage(message, wParam, lParam);
return(0);
}
// For Return and Space, fall through to toggle the square
goto case MessageType.LeftButtonDown;
case MessageType.LeftButtonDown:
window.SetWindowLong(0, (IntPtr)(1 ^ (int)window.GetWindowLong(0)));
window.SetFocus();
window.Invalidate(false);
return(0);
// For focus messages, invalidate the window for repaint
case MessageType.SetFocus:
Checker4.idFocus = (int)window.GetWindowLong(WindowLong.Id);
// Fall through
goto case MessageType.KillFocus;
case MessageType.KillFocus:
window.Invalidate();
return(0);
case MessageType.Paint:
using (DeviceContext dc = window.BeginPaint())
{
Rectangle rect = window.GetClientRectangle();
dc.Rectangle(rect);
if (window.GetWindowLong(0) != IntPtr.Zero)
{
dc.MoveTo(new Point(0, 0));
dc.LineTo(new Point(rect.Right, rect.Bottom));
dc.MoveTo(new Point(0, rect.Bottom));
dc.LineTo(new Point(rect.Right, 0));
}
// Draw the "focus" rectangle
if (window == Windows.GetFocus())
{
rect.Inflate(rect.Width / -10, rect.Height / -10);
dc.SelectObject(StockBrush.Null);
using PenHandle pen = Gdi.CreatePen(PenStyle.Dash, 0, default);
dc.SelectObject(pen);
dc.Rectangle(rect);
dc.SelectObject(StockPen.Black);
}
}
return(0);
}
return(base.WindowProcedure(window, message, wParam, lParam));
}
static LRESULT ChildWindowProcedure(WindowHandle window, WindowMessage message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WindowMessage.Create:
window.SetWindowLong(0, IntPtr.Zero); // on/off flag
return(0);
case WindowMessage.KeyDown:
// Send most key presses to the parent window
if ((VirtualKey)wParam != VirtualKey.Return && (VirtualKey)wParam != VirtualKey.Space)
{
window.GetParent().SendMessage(message, wParam, lParam);
return(0);
}
// For Return and Space, fall through to toggle the square
goto case WindowMessage.LeftButtonDown;
case WindowMessage.LeftButtonDown:
window.SetWindowLong(0, (IntPtr)(1 ^ (int)window.GetWindowLong(0)));
window.SetFocus();
window.Invalidate(false);
return(0);
// For focus messages, invalidate the window for repaint
case WindowMessage.SetFocus:
idFocus = (int)window.GetWindowLong(WindowLong.Id);
// Fall through
goto case WindowMessage.KillFocus;
case WindowMessage.KillFocus:
window.Invalidate();
return(0);
case WindowMessage.Paint:
using (DeviceContext dc = window.BeginPaint())
{
RECT rect = window.GetClientRectangle();
dc.Rectangle(rect);
if (window.GetWindowLong(0) != IntPtr.Zero)
{
dc.MoveTo(0, 0);
dc.LineTo(rect.right, rect.bottom);
dc.MoveTo(0, rect.bottom);
dc.LineTo(rect.right, 0);
}
// Draw the "focus" rectangle
if (window == Windows.GetFocus())
{
rect.left += rect.right / 10;
rect.right -= rect.left;
rect.top += rect.bottom / 10;
rect.bottom -= rect.top;
dc.SelectObject(StockBrush.Null);
using (PenHandle pen = Windows.CreatePen(PenStyle.Dash, 0, 0))
{
dc.SelectObject(pen);
dc.Rectangle(rect);
dc.SelectObject(StockPen.Black);
}
}
}
return(0);
}
return(Windows.DefaultWindowProcedure(window, message, wParam, lParam));
}