java 没有布局管理器的响应式 JFrame
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Responsive JFrame without Layout Manager
提问by Elyas Hadizadeh
I am trying to do have two button in JFrame, and I call the setBoundsmethod of them for setting the positions and size of them and also I passed nullto setLayout1 because I want to usesetBounds` method of component.
我试图在 中有两个按钮JFrame，我调用setBounds它们的方法来设置它们的位置和大小，并且我传递null给setLayout1 because I want to use组件的 setBounds 方法。
Now I want to do something with my code that whenever I resize the frame buttons decoration will change in a suitable form like below pictures:
现在我想对我的代码做一些事情，每当我调整框架按钮的大小时，装饰都会以合适的形式改变，如下图所示：
I know it is possible to use create an object from JPanelclass and add buttons to it and at the end add created panel object to frame, but I am not allowed to it right now because of some reason (specified by professor).
我知道可以使用从JPanel类创建对象并向其添加按钮，最后将创建的面板对象添加到框架中，但由于某些原因（由教授指定），我现在不允许这样做。
Is there any way or do you have any suggestion?
有什么办法或者你有什么建议吗？
My code is like this:
我的代码是这样的：
public class Responsive
{
public static void main(String[] args)
{
JFrame jFrame = new JFrame("Responsive JFrame");
jFrame.setLayout(null);
jFrame.setBounds(0,0,400,300);
JButton jButton1 = new JButton("button 1");
JButton jButton2 = new JButton("button 2");
jButton1.setBounds(50,50,100,100);
jButton2.setBounds(150,50,100,100);
jFrame.add(jButton1);
jFrame.add(jButton2);
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jFrame.setVisible(true);
}
}
回答by Andrew Thompson
A FlowLayoutwith no horizontal spacing, some vertical spacing and large borders could achieve that easily. A nulllayout manager is neverthe answer to a 'responsive' robust GUI.
一个FlowLayout没有水平间距，一些垂直间距和大边框可以做到这一点很容易。一个null布局管理器是永远的答案，“响应”稳健的GUI。
import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
public class ResponsiveGUI {
private JComponent ui = null;
ResponsiveGUI() {
initUI();
}
public void initUI() {
if (ui!=null) return;
ui = new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 8));
ui.setBorder(new EmptyBorder(10,40,10,40));
for (int i=1; i<3; i++) {
ui.add(getBigButton(i));
}
}
public JComponent getUI() {
return ui;
}
private final JButton getBigButton(int number) {
JButton b = new JButton("Button " + number);
int pad = 20;
b.setMargin(new Insets(pad, pad, pad, pad));
return b;
}
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
ResponsiveGUI o = new ResponsiveGUI();
JFrame f = new JFrame("Responsive GUI");
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.setLocationByPlatform(true);
f.setContentPane(o.getUI());
f.pack();
f.setVisible(true);
}
};
SwingUtilities.invokeLater(r);
}
}
回答by Rafcik
You could try to use:
你可以尝试使用：
jFrame.addComponentListener(new ComponentListener() {
// this method invokes each time you resize the frame
public void componentResized(ComponentEvent e) {
// your calculations on buttons
}
});
