我在 GUI 应用程序中调整一些 JPanel 的大小时遇到了这个问题。该应用程序有一个主 JLayeredPane,其中包含 2 个其他 JPanel。在 JPanel 1 中,我有一个登录表单和一个按钮。当我按下按钮时,我想让第一个 JPanel 不可见,第二个 JPanel 可见(这个面板比第一个大),但大小保持不变。贝娄是一些相关的代码。谁能帮我?
int width=300, height=300;
JLayeredPane mainPanel;
JPanel panel1;
JPanel panel2;
panel1.setBounds(0,0,width,height);
panel1.setBackground(new Color(251, 249, 236));
mainPanel.add(panel1, JLayeredPane.DEFAULT_LAYER);
panel2.setBounds(0, 0, width+200, height+200);
panel2.setBackground(new Color(255, 0, 0));
mainPanel.add(panel2, JLayeredPane.DEFAULT_LAYER);
以及点击的按钮代码:
setSize(width+200, height+200);
panel1.setVisible(false);
panel2.setVisible(true);
mainPanel.setSize(width+200, height+200);
mainPanel.validate();
mainPanel.repaint();
这是 JLayredPane 的一些代码:
GroupLayout mainLayout=new GroupLayout(getContentPane());
getContentPane().setLayout(mainLayout);
mainLayout.setHorizontalGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(mainLayout.createSequentialGroup()
.addComponent(mainPanel, GroupLayout.PREFERRED_SIZE, width, GroupLayout.PREFERRED_SIZE))
);
mainLayout.setVerticalGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(mainLayout.createSequentialGroup()
.addComponent(mainPanel, GroupLayout.PREFERRED_SIZE, height, GroupLayout.PREFERRED_SIZE))
);
乐:
对于按钮:
setSize(width+200, height+200);
mainPanel.setSize(width+200, height+200);
mainPanel.remove(panel1);
mainPanel.remove(panel2);
mainPanel.add(panel2, JLayeredPane.DEFAULT_LAYER);
actualizare();
mainPanel.validate();
mainPanel.repaint();
validate();
repaint();
功能:
void actualizare(){
GroupLayout mainLayout=new GroupLayout(getContentPane());
getContentPane().setLayout(mainLayout);
mainLayout.setHorizontalGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(mainLayout.createSequentialGroup()
.addComponent(mainPanel, GroupLayout.PREFERRED_SIZE, width+200, GroupLayout.PREFERRED_SIZE))
);
mainLayout.setVerticalGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(mainLayout.createSequentialGroup()
.addComponent(mainPanel, GroupLayout.PREFERRED_SIZE, height+200, GroupLayout.PREFERRED_SIZE))
);
}