按钮的标题中的换行字符 [英] Newline character in caption of button

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本文介绍了按钮的标题中的换行字符的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在构建一个应用程序,其中我想在表单上显示一个按钮。我想在两行显示按钮的标题。我已经尝试在表单的OnCreate事件中使用以下代码,但它没有显示新行。

  Button.Caption:= '你好'+#13#10 +'world'; 

添加新行的任何其他方法?

解决方案

对于非常旧的不具有WordWrap属性的Delphi版本:



在设置标题之前使用以下代码:

  SetWindowLong(Button1.Handle,GWL_STYLE,
GetWindowLong(Button1.Handle,GWL_STYLE)或BS_MULTILINE);

但棘手的部分是这个代码需要多次执行。当重新创建按钮时,您的多行设置将丢失。类似于这个困境



如下:

  type 
TButton = class(StdCtrls.TButton)
protected
procedure CreateParams(var Params:TCreateParams);覆盖
结束

TForm1 = class(TForm)

...

程序TButton.CreateParams(var Params:TCreateParams);
begin
继承CreateParams(Params);
Params.Style:= Params.Style或BS_MULTILINE;
结束


I am building an application in which I want to display a button on a form. I want to display the Caption of the button on two lines. I have tried using the following code in the form's OnCreate event but it is not showing the new line.

Button.Caption := 'Hello' + #13#10 + 'world';

Any other method to add a new line?

解决方案

For very old Delphi versions which do not have the WordWrap property:

Use following code prior to setting the caption:

SetWindowLong(Button1.Handle, GWL_STYLE, 
  GetWindowLong(Button1.Handle, GWL_STYLE) or BS_MULTILINE);

But the tricky part is that this code needs execution on a number of occasions. When the button is recreated, then your multiline setting is lost. Kind of similar to this dilemma.

Luckily the VCL provides a solution, but you have to subclass the TButton type, e.g. as follows:

type
  TButton = class(StdCtrls.TButton)
  protected
    procedure CreateParams(var Params: TCreateParams); override;
  end;

  TForm1 = class(TForm)

...

procedure TButton.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  Params.Style := Params.Style or BS_MULTILINE;
end;

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