delphi – 创建TToolbutton运行时

procedure AddButtonToToolbar(var bar: TToolBar; caption: string);
var
  newbtn: TToolButton;
  lastbtnidx: integer;
begin
  newbtn := TToolButton.Create(bar);
  newbtn.Caption := caption;
  lastbtnidx := bar.ButtonCount - 1;
  if lastbtnidx > -1 then
    newbtn.Left := bar.Buttons[lastbtnidx].Left + bar.Buttons[lastbtnidx].Width
  else
    newbtn.Left := 0;
  newbtn.Parent := bar;
end;

这里是该过程的示例用法：

procedure Button1Click(Sender: TObject);
begin
  ToolBar1.ShowCaptions := True;  //by default,this is False
  AddButtonToToolbar(ToolBar1,IntToStr(ToolBar1.ButtonCount));
end;

您的问题还会询问如何在TToolbar上的任意位置添加按钮.此代码与之前类似,但它也允许您指定要在其后显示新按钮的索引.

procedure AddButtonToToolbar(var bar: TToolBar; caption: string;
  addafteridx: integer = -1);
var
  newbtn: TToolButton;
  prevBtnIdx: integer;
begin
  newbtn := TToolButton.Create(bar);
  newbtn.Caption := caption;

  //if they asked us to add it after a specific location,then do so
  //otherwise,just add it to the end (after the last existing button)
  if addafteridx = -1 then begin
    prevBtnIdx := bar.ButtonCount - 1;
  end
  else begin
    if bar.ButtonCount <= addafteridx then begin
      //if the index they want to be *after* does not exist,//just add to the end
      prevBtnIdx := bar.ButtonCount - 1;
    end
    else begin
      prevBtnIdx := addafteridx;
    end;
  end;

  if prevBtnIdx > -1 then
    newbtn.Left := bar.Buttons[prevBtnIdx].Left + bar.Buttons[prevBtnIdx].Width
  else
    newbtn.Left := 0;

  newbtn.Parent := bar;
end;

这是修改版本的示例用法：

procedure Button1Click(Sender: TObject);
begin
  //by default,"ShowCaptions" is false
  ToolBar1.ShowCaptions := True;

  //in this example,always add our new button immediately after the 0th button
  AddButtonToToolbar(ToolBar1,IntToStr(ToolBar1.ButtonCount),0);
end;

祝你好运！