Method ControlSetTreeViewOptions

source/script_gui.cpp:9777–9798

void GuiType::ControlSetTreeViewOptions(GuiControlType &aControl, GuiControlOptionsType &aOpt)
// Caller has ensured that aControl.type is TreeView.
// Caller has ensured that aOpt.color_bk is CLR_INVALID if no change should be made to the
// current background color.
{
	if (aOpt.color != CLR_INVALID) // Explicit color change was requested.
	{
		TreeView_SetTextColor(aControl.hwnd, aOpt.color == CLR_DEFAULT ? -1 : aOpt.color); // Must pass -1 rather than CLR_DEFAULT for TreeView controls.
		aOpt.color = CLR_INVALID; // Let ControlParseOptions() know we handled it.
	}
	if (aOpt.color_bk != CLR_INVALID)
		TreeView_SetBkColor(aControl.hwnd, aOpt.color_bk == CLR_DEFAULT ? -1 : aOpt.color_bk);
	// Disabled because it apparently is not supported on XP:
	//if (aOpt.tabstop_count)
	//	// Although TreeView_GetIndent() confirms that the following takes effect, it doesn't seem to 
	//	// cause any visible change, at least under XP SP2 (tried various style changes as well as Classic vs.
	//	// XP theme, as well as the "-Theme" option.
	//	TreeView_SetIndent(aControl.hwnd, aOpt.tabstop[0]);

	// Unlike ListView, seems not to be needed:
	//InvalidateRect(aControl.hwnd, NULL, TRUE);
}