这是this question关于在启用VCL样式时使工具栏按钮变平的后续行动。使用该问题的解决方案,现在我的大多数TActionToolbar按钮都是扁平的。但是,有一个工具栏按钮,其中包含一个带有其他操作的下拉菜单:
它仍然在它周围绘制按钮边缘。如何删除带有下拉菜单的工具栏按钮的按钮边框,以便它们与其他普通按钮匹配,看起来更像是在禁用VCL样式时?
答案 0 :(得分:7)
此类按钮由TThemedDropDownButton
类绘制,因此您必须覆盖此类和TThemedDropDownButton.DrawBackground
方法。
使用same unit of the previous answer添加一个名为TThemedDropDownButtonEx
TThemedDropDownButtonEx= class(TThemedDropDownButton)
protected
procedure DrawBackground(var PaintRect: TRect); override;
end;
然后像这样实现DrawBackground方法
procedure TThemedDropDownButtonEx.DrawBackground(var PaintRect: TRect);
const
CheckedState: array[Boolean] of TThemedToolBar = (ttbButtonHot, ttbButtonCheckedHot);
var
LIndex : Integer;
begin
LIndex := SaveDC(Canvas.Handle);
try
if Enabled and not (ActionBar.DesignMode) then
begin
if (MouseInControl or IsChecked or DroppedDown) and
(Assigned(ActionClient) and not ActionClient.Separator) then
begin
StyleServices.DrawElement(Canvas.Handle, StyleServices.GetElementDetails(CheckedState[IsChecked or (FState = bsDown)]), PaintRect);
if IsChecked and not MouseInControl then
StyleServices.DrawElement(Canvas.Handle, StyleServices.GetElementDetails(ttbButtonPressed), PaintRect);
end
else
;
end
else
;
finally
RestoreDC(Canvas.Handle, LIndex);
end;
end;
最后以这种方式修改 TPlatformVclStylesStyle.GetControlClass 方法
更改此代码
if AnItem.HasItems then
case GetActionControlStyle of
csStandard: Result := TStandardDropDownButton;
csXPStyle: Result := TXPStyleDropDownBtn;
else
Result := TThemedDropDownButton;
end
else
由此
if AnItem.HasItems then
case GetActionControlStyle of
csStandard: Result := TStandardDropDownButton;
csXPStyle: Result := TXPStyleDropDownBtn;
else
Result := TThemedDropDownButtonEx;
end
else