//看看我的代码,很管用 procedure TForm1.Button1Click(Sender: TObject); var rect:TRect begin rect.Left := 10; rect.Right := 15; rect.Top := 10; rect.Bottom := 20; Canvas.Brush.Color:=clYellow; //Canvas.FillRect(8,8,12,12);//这样用有问题 canvas.FillRect(rect); end;procedure TForm1.Button2Click(Sender: TObject); begin form1.Repaint;//问题解决,OK! end;
var bShowRect: Boolean;procedure TForm1.Create(Sender: TObject); begin bShowRect:= True; end; procedure TForm1.Paint(Sender: TObject); begin if bShowRect then begin Canvas.Brush.Color:=clYellow; Canvas.FillRect(Rect(8,8,12,12)); end end;procedure TForm1.CheckBox1Click(Sender: TObject); begin bShowRect:= CheckBox1.Checked; form1.Repaint; end;
应该是Canvas.FillRect(rect);
//看看我的代码,很管用
procedure TForm1.Button1Click(Sender: TObject);
var
rect:TRect
begin
rect.Left := 10;
rect.Right := 15;
rect.Top := 10;
rect.Bottom := 20;
Canvas.Brush.Color:=clYellow;
//Canvas.FillRect(8,8,12,12);//这样用有问题
canvas.FillRect(rect);
end;procedure TForm1.Button2Click(Sender: TObject);
begin
form1.Repaint;//问题解决,OK!
end;
bShowRect: Boolean;procedure TForm1.Create(Sender: TObject);
begin
bShowRect:= True;
end;
procedure TForm1.Paint(Sender: TObject);
begin
if bShowRect then begin
Canvas.Brush.Color:=clYellow;
Canvas.FillRect(Rect(8,8,12,12));
end
end;procedure TForm1.CheckBox1Click(Sender: TObject);
begin
bShowRect:= CheckBox1.Checked;
form1.Repaint;
end;
放一个panel,
Caption:='';
BevelOuter:=bvNone;
Color:=clYellow
然后用就是了,visible属性什么的都有