从TSpeedButton中删除闪烁

Question

重现步骤:

1. 添加TPanel到新的VCL表单并进行设置Align = alClient.
2. 添加TSpeedButton到面板并将一些bmp图像分配给Glyph属性.(可选但使得它更清晰:Flat = True)
3. 运行应用程序,抓住表单的右下角并移动它.TSpeedButton将闪烁的图像.

我阅读了很多关于消除闪烁的内容,但这些建议似乎都不适用于TSpeedButton:

• 没有DoubleBuffered财产
• WS_EX_COMPOSITED不能设置,因为它不是一个TWinControl而是一个TGraphicControl
• WM_ERASEBKGND 消息未收到

如果它有任何重要性,我实际上正在使用TPngSpeedButton,但由于实际问题在于TSpeedButton,我在示例中使用它.

这有什么解决方案吗？

编辑:由于某种原因,到目前为止没有人能够重现这一点,所以为了确保它不是我的描述,这里是dfm:

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 337
  ClientWidth = 635
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Panel1: TPanel
    Left = 0
    Top = 0
    Width = 635
    Height = 337
    Align = alClient
    Caption = 'Panel1'
    TabOrder = 0
    object SpeedButton1: TSpeedButton
      Left = 64
      Top = 56
      Width = 32
      Height = 32
      Flat = True
      Glyph.Data = {
        360C0000424D360C000000000000360000002800000020000000200000000100
        180000000000000C000000000000000000000000000000000000FFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FCC483FCC483FCC483F241CED241CED241CED241CED241CEDCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FCC483FCC483FCC483F241CED241CED241CED241CED241CEDCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FCC483FCC483FCC483F241CED241CED241CED241CED241CEDCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FCC483FCC483FCC483F241CED241CED241CED241CED241CEDCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FCC483FCC483FCC483F241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FFFFFFFFFFFFFFFFFFF241CED241CED241CED241CED241CED241C
        ED241CED241CED241CED241CED241CED241CED241CED241CED241CED241CED24
        1CED241CED241CED241CED241CED241CED241CED241CED241CEDCC483FCC483F
        CC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC483F
        CC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC483F
        CC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC483F
        CC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC483F
        CC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC483F
        CC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC483FCC483F
        CC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC483FCC48
        3FCC483FCC483FCC483FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF}
    end
  end
end

这就是它的外观.实际上它的速度要快一些,但捕获的视频和gif转换速度会慢下来.

Answer 1

我实际上能够在Windows 7上使用Delphi 10.2.3 Tokyo重现它.我经常遇到类似的问题,从那以后我一直在为所有人TPanel及其后代使用这个设置,这也适用于这种情况.

Panel1.DoubleBuffered := True;
Panel1.ParentBackground := False;