我试了用C++ Builder6自带的TPanel改变其Color属性后会导致子控件重绘,查看了VCL的源码后知道TPanel的Color属性是继承了TControl的Color的属性,在TControl的SetColor函数中调用了Perform(CM_COLORCHANGED, 0, 0);导致控件重绘,而我自己添加了此行代码后控件却仍然不能导致子控件重绘,该怎么办啊??
void __fastcall TColorPanel::SetPanelBeginColor(TColor Value)
{
if(m_clPnlColorBegin != Value)
{
m_clPnlColorBegin = Value;
Perform(CM_COLORCHANGED, 0, 0);
}
}
VCL的原代码
procedure TControl.SetColor(Value: TColor);
begin
if FColor <> Value then
begin
FColor := Value;
FParentColor := False;
Perform(CM_COLORCHANGED, 0, 0);
end;
end;
procedure TControl.CMColorChanged(var Message: TMessage);
begin
Invalidate;
end;
