FMXUI

在 FMXUI 开源库，增加了 UI.Dialog 单元。此单元实现了跨平台的基础对话框组件。使用时引用 UI.Dialog 即可。如果需要自定义对话框的样式， 可以添加一个 TDialogStyleManager 组件在主窗体中。

GIT:  https://github.com/yangyxd/FMXUI

对话框效果演示图(默认样式，Windows平台)：

此 Demo 已经包含在源码库中，主要代码如下：

uses
  UI.Dialog, UI.Async;

{ TFrmaeDialog }

procedure TFrmaeDialog.ButtonView1Click(Sender: TObject);
begin
  TDialogBuilder.Create(Self)
    .SetMessage('我是一个消息框。')
    .Show;
end;

procedure TFrmaeDialog.ButtonView2Click(Sender: TObject);
begin
  TDialogBuilder.Create(Self)
    .SetMessage('我是一个消息框。这里显示消息内容')
    .SetNegativeButton('Negative',
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint(Dialog.Builder.NegativeButtonText);
      end
    )
    .SetNeutralButton('Neutral',
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint(Dialog.Builder.NeutralButtonText);
      end
    )
    .SetPositiveButton('Positive',
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint(Dialog.Builder.PositiveButtonText);
      end
    )
    .Show;
end;

procedure TFrmaeDialog.ButtonView3Click(Sender: TObject);
begin
  TDialogBuilder.Create(Self)
    .SetTitle('我是标题文本')
    .SetMessage('我是一个消息框。这里显示消息内容')
    .SetNegativeButton('Negative',
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint(Dialog.Builder.NegativeButtonText);
      end
    )
    .SetPositiveButton('Positive',
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint(Dialog.Builder.PositiveButtonText);
      end
    )
    .Show;
end;

procedure TFrmaeDialog.ButtonView4Click(Sender: TObject);
begin
  TDialogBuilder.Create(Self)
    .SetTitle('我是标题文本')
    .SetItems(['列表项 - 1', '列表项 - 2', '列表项 - 3', '列表项 - 4', '列表项 - 5'],
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint(Dialog.Builder.ItemArray[Which]);
      end
    )
    .Show;
end;

procedure TFrmaeDialog.ButtonView5Click(Sender: TObject);
begin
  TDialogBuilder.Create(Self)
    .SetTitle('我是标题文本')
    .SetSingleChoiceItems(['列表项 - 1', '列表项 - 2', '列表项 - 3', '列表项 - 4', '列表项 - 5'], 1)
    .SetPositiveButton('取消')
    .SetNegativeButton('确定',
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint('选择了: ' + Dialog.Builder.ItemArray[Dialog.Builder.CheckedItem]);
      end
    )
    .Show;
end;

procedure TFrmaeDialog.ButtonView6Click(Sender: TObject);
begin
  TDialogBuilder.Create(Self)
    .SetTitle('我是标题文本')
    .SetMultiChoiceItems(['列表项 - 1', '列表项 - 2', '列表项 - 3', '列表项 - 4', '列表项 - 5'], [])
    .SetPositiveButton('取消')
    .SetNegativeButton('确定',
      procedure (Dialog: IDialog; Which: Integer) begin
        Hint(Format('选择了 %d 项.', [Dialog.Builder.CheckedCount]));
      end
    )
    .Show;
end;

procedure TFrmaeDialog.ButtonView7Click(Sender: TObject);
begin
  ShowWaitDialog('正在执行任务...', False);
  TAsync.Create()
  .SetExecute(
    procedure (Async: TAsync) begin
      Sleep(3000);
    end
  )
  .SetExecuteComplete(
    procedure (Async: TAsync) begin
      HideWaitDialog;
    end
  ).Start;
end;

procedure TFrmaeDialog.ButtonView8Click(Sender: TObject);
begin
  ShowWaitDialog('正在执行任务...',
    procedure (Dialog: IDialog) begin
      Hint('任务被取消');
    end
  );
  TAsync.Create()
  .SetExecute(
    procedure (Async: TAsync) begin
      Sleep(5000);
    end
  )
  .SetExecuteComplete(
    procedure (Async: TAsync) begin
      if not IsWaitDismiss then // 如果任务没有被中断
        Hint('任务执行完成.');
      HideWaitDialog;
    end
  ).Start;
end;

procedure TFrmaeDialog.DoShow;
begin
  inherited;
  tvTitle.Text := Title;
end;

procedure TFrmaeDialog.SpeedButton1Click(Sender: TObject);
begin
  Finish;
end;

http://www.cnblogs.com/yangyxd/articles/5877638.html