Delphi Flicker Free,带有外观

Question

如果我使用绘图框和滚动条创建一个简单的应用程序,在绘图框中绘制一些矩形,并使滚动条更改刷新绘制框,当我拖动滚动条时我得到一个无闪烁的显示(DoubleBuffer设置为表格):

procedure TMainForm.OnHorzChange(Sender: TObject);
begin
    PaintBox.Refresh;
end;

procedure TMainForm.OnPaint(Sender: TObject);
var
    x, y: integer;

begin
    with PaintBox.Canvas do
    begin
        Pen.Color := clBlack;
        Brush.Color := clGray;
        for y := 0 to 9 do
            for x := 0 to 9 do
                Rectangle(x * 32, y * 32, x * 32 + 24, y * 32 + 24);
    end;
end;

如果我然后将外观更改为Carbon,则闪烁返回:

program test;

uses
    Vcl.Forms,
    main in 'main.pas' {MainForm},
    Vcl.Themes,
    Vcl.Styles;

{$R *.res}

begin
    Application.Initialize;
    Application.MainFormOnTaskbar := True;
    TStyleManager.TrySetStyle('Carbon');
    Application.CreateForm(TMainForm, MainForm);
    Application.Run;
end.

那么我怎样才能使用外观而不是闪烁？主窗口上的设置双缓冲区不会停止闪烁.

Answer 1

把你PaintBox打开TPanel并设置Panel.ParentBackground为False.在这种情况下,它不会闪烁.