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相关控件: TMenuBar、TPopupMenu、TMainMenu; 它们都是要包含 TMenuItem; 在设计时添加 TMenuItem 很容易. 其中的 TMainMenu 暂不能应用其他样式; TMenuBar 只有一个值得注意 UseOSMenu 属性. 控件 PopupMenu 属性用于指定右键菜单. 暂时无法直接为窗体指定右键菜单, 因为窗体现在没有 PopupMenu 属性; 我想到的办法是在窗体上覆盖一个 TPanel 或 TRectangle: procedure TForm1.FormCreate(Sender: TObject); begin Panel1.Align := TAlignLayout.alClient; Panel1.StyleLookup := StyleLookup; Panel1.PopupMenu := PopupMenu1; end; 也可通过 TPopupMenu 的 Popup() 方法: procedure TForm1.MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); var pt: TPointF; begin inherited; if Button = TMouseButton.mbRight then begin pt := PointF(x,y); pt := ClientToScreen(pt); PopupMenu1.Popup(pt.X, pt.Y); end; end; Popup() 方法用于控件的例子(如 TRectangle): procedure TForm1.Rectangle1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single); var pt: TPointF; begin if Button = TMouseButton.mbRight then begin pt := PointF(x,y); pt := TControl(Sender).LocalToAbsolute(pt); pt := ClientToScreen(pt); PopupMenu1.Popup(pt.X, pt.Y); end; end; TPopupMenu 的功能很简单, 更多需要在 TMenuItem 中. 以下测试都需要在空白窗体上先放置 Rectangle1、PopupMenu1. 动态添加菜单项: procedure TForm1.FormCreate(Sender: TObject); begin Rectangle1.PopupMenu := PopupMenu1; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item1'; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item2'; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := '-'; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item3'; end; end; 嵌套菜单项: procedure TForm1.FormCreate(Sender: TObject); var item: TMenuItem; begin Rectangle1.PopupMenu := PopupMenu1; item := TMenuItem.Create(Self); item.Parent := PopupMenu1; item.Text := 'Item1'; with TMenuItem.Create(Self) do begin Parent := item; Text := 'Item1_1'; end; with TMenuItem.Create(Self) do begin Parent := item; Text := 'Itme1_2'; end; with TMenuItem.Create(Self) do begin Parent := PopupMenu1; Text := 'Item2'; end; end; 指定快捷键: procedure TForm1.FormCreate(Sender: TObject); begin Rectangle1.PopupMenu := PopupMenu1; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item1'; ShortCut := scCtrl or Byte('A'); //Ctrl + A end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item2'; ShortCut := scShift or scCtrl or scAlt or Ord('A'); //Shift + Ctrl + Alt + A end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := '-'; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item3'; ShortCut := 112; //F1 end; end; 复选菜单项: procedure TForm1.FormCreate(Sender: TObject); begin Rectangle1.PopupMenu := PopupMenu1; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item1'; AutoCheck := True; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item2'; AutoCheck := True; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := '-'; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item3'; AutoCheck := True; end; end; 单选(分组)菜单项: procedure TForm1.FormCreate(Sender: TObject); begin Rectangle1.PopupMenu := PopupMenu1; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item1'; AutoCheck := True; RadioItem := True; GroupIndex := 1; IsChecked := True; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item2'; AutoCheck := True; RadioItem := True; GroupIndex := 1; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := '-'; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item3'; AutoCheck := True; RadioItem := True; GroupIndex := 2; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item4'; AutoCheck := True; RadioItem := True; GroupIndex := 2; end; end; 菜单文本格式: procedure TForm1.FormCreate(Sender: TObject); begin Rectangle1.PopupMenu := PopupMenu1; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item1'; Font.Style := [TFontStyle.fsBold, TFontStyle.fsItalic]; end; end; 图标: procedure TForm1.FormCreate(Sender: TObject); begin Rectangle1.PopupMenu := PopupMenu1; with TMenuItem.Create(Self) do begin Parent := PopupMenu1; Text := 'Item1'; Bitmap.LoadFromFile('c:\temp\test.png'); end; end; 指定事件: unit Unit1; interface uses System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, FMX.Types, FMX.Controls, FMX.Forms, FMX.Dialogs, FMX.Menus, FMX.Objects; type TForm1 = class(TForm) Rectangle1: TRectangle; PopupMenu1: TPopupMenu; procedure FormCreate(Sender: TObject); procedure ItemOnClick(Sender: TObject); end; var Form1: TForm1; implementation {$R *.fmx} procedure TForm1.FormCreate(Sender: TObject); begin Rectangle1.PopupMenu := PopupMenu1; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item1'; OnClick := ItemOnClick; end; with TMenuItem.Create(PopupMenu1) do begin Parent := PopupMenu1; Text := 'Item2'; OnClick := ItemOnClick; end; end; procedure TForm1.ItemOnClick(Sender: TObject); begin ShowMessage(TTextControl(Sender).Text); end; end. |
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