static LRESULT CallDefaultProcedure(WindowHandle window, WindowMessage message, WPARAM wParam, LPARAM lParam)
{
return(WindowMethods.DefaultWindowProcedure(window, message, wParam, lParam));
}
static LRESULT WindowProcedure(WindowHandle window, WindowMessage message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WindowMessage.Size:
int cxClient = lParam.LowWord;
int cyClient = lParam.HighWord;
apt[0].x = cxClient / 4;
apt[0].y = cyClient / 2;
apt[1].x = cxClient / 2;
apt[1].y = cyClient / 4;
apt[2].x = cxClient / 2;
apt[2].y = 3 * cyClient / 4;
apt[3].x = 3 * cxClient / 4;
apt[3].y = cyClient / 2;
return(0);
case WindowMessage.LeftButtonDown:
case WindowMessage.RightButtonDown:
case WindowMessage.MouseMove:
MouseKey mk = (MouseKey)wParam.LowWord;
if ((mk & (MouseKey.LeftButton | MouseKey.RightButton)) != 0)
{
using (DeviceContext dc = window.GetDeviceContext())
{
dc.SelectObject(StockPen.White);
DrawBezier(dc, apt);
if ((mk & MouseKey.LeftButton) != 0)
{
apt[1].x = lParam.LowWord;
apt[1].y = lParam.HighWord;
}
if ((mk & MouseKey.RightButton) != 0)
{
apt[2].x = lParam.LowWord;
apt[2].y = lParam.HighWord;
}
dc.SelectObject(StockPen.Black);
DrawBezier(dc, apt);
}
}
return(0);
case WindowMessage.Paint:
window.Invalidate(true);
using (DeviceContext dc = window.BeginPaint())
{
DrawBezier(dc, apt);
}
return(0);
case WindowMessage.Destroy:
WindowMethods.PostQuitMessage(0);
return(0);
}
return(WindowMethods.DefaultWindowProcedure(window, message, wParam, lParam));
}