重现的步骤:
TPanel
添加到新的VCL表单并设置Align = alClient
。TSpeedButton
添加到面板,并将一些bmp图像分配给Glyph
属性。 (可选但更清晰:Flat = True
)TSpeedButton
中的图片会闪烁。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
:
DoubleBuffered
属性WS_EX_COMPOSITED
无法设置,因为它不是TWinControl
而是TGraphicControl
WM_ERASEBKGND
消息未收到如果它具有任何重要性,我实际上正在使用TPngSpeedButton
,但由于实际问题在TSpeedButton
内,我在示例中使用了它。< / p>
有没有解决方案?
编辑:由于某种原因,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
And this is how it looks。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。
答案 0 :(得分:9)
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;