首先，我已经知道，当你在实现 aTSpeedButton时，当你分配它的时候Glyph，如果你没有多个字形，那么NumGlyphs应该是1，当它被禁用时，它会自动使用相同的图像来自动生成一个字形的禁用版本。
但是，在我的情况下，我正在为这个速度按钮分配一个动作。TActionManager既具有又Images指向DisabledImages同一个TImageList。我还测试了没有任何DisabledImages分配，以及使用全黑蒙版创建图像的副本，并通过DisabledImages.
启用时，字形显示得很好（基于操作上设置的图像）。但是当它被禁用时，图像中只有纯黑色将用于禁用图像。任何除了纯黑色之外的任何颜色，甚至是略带黑色的颜色，都会被完全忽略，并且在渲染禁用的图像时不包括在内。
这是启用测试的图像和自动生成的禁用图像之间的比较。该图像只是一个带有一些垂直线的 16x16 位图。从最右边开始，一条完全黑色的线，然后是左边稍亮的线。
如您所见，禁用时，它只考虑完全黑线。下一行只比全黑稍微亮一点。
我不能自己分配该Glyph属性，因为它会被分配给它的操作覆盖。我也无法在图像列表上设置两个字形宽度的图像，因为这些图像被广泛用于许多其他没有多个字形概念的地方。我也不想为我的图像使用全黑。
当分配给它的操作时，如何让禁用TSpeedButton（作为 disabled 的结果）显示禁用（灰色）图像？TAction
注意：同样的情况也发生在TBitBtn或任何依赖于Glyph.
u44169002.pas
unit u44169002;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.Buttons, System.ImageList,
Vcl.ImgList, System.Actions, Vcl.ActnList, Vcl.PlatformDefaultStyleActnCtrls, Vcl.ActnMan, Vcl.StdCtrls;
type
TForm1 = class(TForm)
Actions: TActionManager;
actTest: TAction;
ImageList: TImageList;
SpeedButton1: TSpeedButton;
BitBtn1: TBitBtn;
procedure actTestExecute(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.actTestExecute(Sender: TObject);
begin
Self.actTest.Enabled:= False;
end;
end.
u44169002.dfm
object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 231
ClientWidth = 405
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
PixelsPerInch = 96
TextHeight = 13
object SpeedButton1: TSpeedButton
Left = 24
Top = 24
Width = 105
Height = 33
Action = actTest
Flat = True
end
object BitBtn1: TBitBtn
Left = 160
Top = 24
Width = 105
Height = 33
Action = actTest
Caption = 'Test Action'
TabOrder = 0
end
object Actions: TActionManager
DisabledImages = ImageList
Images = ImageList
Left = 24
Top = 128
StyleName = 'Platform Default'
object actTest: TAction
Caption = 'Test Action'
Hint = 'This is just a test action'
ImageIndex = 0
OnExecute = actTestExecute
end
end
object ImageList: TImageList
Left = 24
Top = 72
Bitmap = {
494C010101000800440010001000FFFFFFFFFF10FFFFFFFFFFFFFFFF424D3600
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000000000000000000000000000000000000424D3E000000000000003E000000
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000000000000}
end
end
例如，这是我使用的测试位图：
实际上，在Vcl.Buttons单元中，在函数TButtonGlyph.CreateButtonGlyph中，下面的代码似乎明确地只考虑了黑色区域：
{ Create a disabled version }
with MonoBmp do
begin
Assign(FOriginal);
HandleType := bmDDB;
Canvas.Brush.Color := clBlack;
Width := IWidth;
if Monochrome then
begin
Canvas.Font.Color := clWhite;
Monochrome := False;
Canvas.Brush.Color := clWhite;
end;
Monochrome := True;
end;
with TmpImage.Canvas do
begin
Brush.Color := clBtnFace;
FillRect(IRect);
Brush.Color := clBtnHighlight;
SetTextColor(Handle, clBlack);
SetBkColor(Handle, clWhite);
BitBlt(Handle, 1, 1, IWidth, IHeight,
MonoBmp.Canvas.Handle, 0, 0, ROP_DSPDxax);
Brush.Color := clBtnShadow;
SetTextColor(Handle, clBlack);
SetBkColor(Handle, clWhite);
BitBlt(Handle, 0, 0, IWidth, IHeight,
MonoBmp.Canvas.Handle, 0, 0, ROP_DSPDxax);
end;