private void DoTreeCustomDrawing(ref Message m)
{
NMTVCUSTOMDRAW tvcd = (NMTVCUSTOMDRAW)m.GetLParam(typeof(NMTVCUSTOMDRAW));
IntPtr hNode = (IntPtr)tvcd.nmcd.dwItemSpec;
Rectangle rect = GetItemRect(hNode);
// Create a graphic object from the Device context in the message
Graphics g = Graphics.FromHdc(tvcd.nmcd.hdc);
// If this item has the focus draw the higlighting rectangle
if (itemHasFocus)
{
using (Brush brush = new SolidBrush(ColorUtil.VSNetSelectionColor))
{
g.FillRectangle(brush, rect.Left, rect.Top, rect.Width - 1, rect.Height - 1);
g.DrawRectangle(SystemPens.Highlight, rect.Left, rect.Top, rect.Width - 1, rect.Height - 1);
}
}
// Draw Text
string itemText = GetItemText(hNode);
Size textSize = TextUtil.GetTextSize(g, itemText, Font);
Point pos = new Point(rect.Left, rect.Top + (rect.Height - textSize.Height) / 2);
g.DrawString(itemText, Font, SystemBrushes.ControlText, pos);
// Put structure back in the message
Marshal.StructureToPtr(tvcd, m.LParam, true);
m.Result = (IntPtr)CustomDrawReturnFlags.CDRF_SKIPDEFAULT;
}
private bool NotifyTreeCustomDraw(ref Message m)
{
m.Result = (IntPtr)CustomDrawReturnFlags.CDRF_DODEFAULT;
NMTVCUSTOMDRAW tvcd = (NMTVCUSTOMDRAW)m.GetLParam(typeof(NMTVCUSTOMDRAW));
IntPtr thisHandle = Handle;
if (tvcd.nmcd.hdr.hwndFrom != Handle)
{
return(false);
}
switch (tvcd.nmcd.dwDrawStage)
{
case (int)CustomDrawDrawStateFlags.CDDS_PREPAINT:
// Ask for Item painting notifications
m.Result = (IntPtr)CustomDrawReturnFlags.CDRF_NOTIFYITEMDRAW;
break;
case (int)CustomDrawDrawStateFlags.CDDS_ITEMPREPAINT:
itemHasFocus = false;
if ((tvcd.nmcd.uItemState & (int)CustomDrawItemStateFlags.CDIS_FOCUS) != 0)
{
itemHasFocus = true;
}
// Set the text and background text color to the window bakcground
// text so that we don't see the text being painted
tvcd.clrText = ColorUtil.RGB(SystemColors.Window.R,
SystemColors.Window.G, SystemColors.Window.B);
tvcd.clrTextBk = ColorUtil.RGB(SystemColors.Window.R,
SystemColors.Window.G, SystemColors.Window.B);
// Put structure back in the message
Marshal.StructureToPtr(tvcd, m.LParam, true);
m.Result = (IntPtr)CustomDrawReturnFlags.CDRF_NOTIFYPOSTPAINT;
break;
case (int)CustomDrawDrawStateFlags.CDDS_ITEMPOSTPAINT:
DoTreeCustomDrawing(ref m);
break;
default:
break;
}
return(false);
}