单击按钮后更改Frame的内容窗格 [英] Change contentpane of Frame after button clicked

问题描述

我希望能够在单击该框架的某个JPanels中的按钮后设置JFrame的contentpane。

I want to be able to set a JFrame's contentpane after a button inside one of that frame's JPanels has been clicked.

我的架构由一个控制器组成，该控制器创建了JFrame和它里面的第一个JPanel。从第一个JPanel中我调用一个方法：setcontentpane（JPanel jpanel）在控制器上。但是，不是加载传递的JPanel，它只会移除所有面板（请参阅下面的代码）

My architecture consists of a controller which creates the JFrame and the first JPanel inside of it. From within the first JPanel I'm calling a method: setcontentpane(JPanel jpanel) on the controller. However, instead of loading the passed JPanel it does nothing but removing all Panels (see code below)

第一个JPanel内的ActionListener：

ActionListener inside of the first JPanel:

public void actionPerformed(ActionEvent arg0) {
            controller.setpanel(new CustomPanel(string1, string2));
        }

控制器：

JFrame frame;

public void setpanel(JPanel panel)
{
    frame.getContentPane().removeAll();
    frame.getContentPane().add(panel);
    frame.repaint();
}

public Controller(JFrame frame)
{
    this.frame=frame;
}

谁能告诉我我做错了什么？谢谢：）

Can anyone tell me what I'm doing wrong? Thanks :)

推荐答案

调用revalidate，然后重新绘制。这告诉布局管理器要对其组件进行布局：

Call revalidate, then repaint. This tells the layout managers to do their layouts of their components:

JPanel contentPane = (JPanel) frame.getContentPane();

contentPane.removeAll();
contentPane.add(panel);
contentPane.revalidate(); 
contentPane.repaint();

更好但是如果你只想交换JPanels就是使用CardLayout并让它做脏工作。

Better though if you just want to swap JPanels is to use a CardLayout and have it do the dirty work.

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