private static void OnBackgroundChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (e.NewValue != e.OldValue)
{
GB_GridHeader header = d as GB_GridHeader;
GDI.Brush brush = ConvertWpfBrush2GDI(e.NewValue as Brush, header.m_bufferedBmp.PixelHeight);
if (brush != null)
{
header.m_background.Dispose();
header.m_background = brush;
}
}
}
protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
if (mDraggedElement != null)
{
Win32.POINT screenPos = new Win32.POINT();
if (Win32.GetCursorPos(ref screenPos))
{
int iPosition = -1;
GB_GridHeader header = mDraggedElement as GB_GridHeader;
if (header != null)
{
Point pt = header.PointFromScreen(new Point(screenPos.X, screenPos.Y));
System.Diagnostics.Debug.WriteLine("pt = " + pt.X);
double dX = pt.X;
int iColumn = header.GetCellColumn(ref dX);
if (iColumn >= 0)
{
iPosition = header.GetCellPosition(iColumn);
}
}
Point pos = PointFromScreen(new Point(screenPos.X, screenPos.Y));
Rect rect = new Rect(pos.X, pos.Y, contentbmp.PixelWidth, contentbmp.PixelHeight);
drawingContext.PushOpacity(0.7);
drawingContext.DrawImage(contentbmp, rect);
if (iPosition >= 0)
{
Point pos1 = header.PointToScreen(new Point(iPosition, header.ActualHeight));
pos1 = PointFromScreen(pos1);
lgArrow.Transform = new TranslateTransform(pos1.X, pos1.Y);
drawingContext.DrawGeometry(header.Foreground, new Pen(header.Foreground, 1), lgArrow);
}
drawingContext.Pop();
}
}
}
