RichEdit的内容同步更新到Image上,发现慢一个字
我在RichEdit的Onchange事件中,有如下代码,目的是RichEdit输入什么,能同步的更新到Image上。运行以上代码以后,发现Image的显示比RichEdit上慢一些,不知如何解决了
BitBlt(Image1->Canvas->Handle,
0,0,
RichEdit1->Width,
RichEdit1->Height,
GetDC(RichEdit1->Handle),
0,0,
SRCCOPY);
ReleaseDC(RichEdit1->Handle, GetDC(RichEdit1->Handle));
Image1->Refresh();
void __fastcall TForm2::RichEdit1Change(TObject *Sender)
{
// Image1->Canvas->TextOutA(0,0,RichEdit1->Text);
//RichEdit1->Refresh(); //加这一句或下面都可以 就好了
RichEdit1->Repaint();
BitBlt(Image1->Canvas->Handle,
0,0,
RichEdit1->Width,
RichEdit1->Height,
GetDC(RichEdit1->Handle),
0,0,
SRCCOPY);
ReleaseDC(RichEdit1->Handle, GetDC(RichEdit1->Handle));
Image1->Refresh();
}