绝对定位JButton [英] Absolute Positioning a JButton
本文介绍了绝对定位JButton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
我正在尝试将JButton的布局设置为null,但不会显示,如果我切换到gridlayout,无论我进行什么更改,它们都只会排列在中间.如何设置按钮的位置和大小?
I am trying to position a JButton with a null layout but it will not show up, if i switch to gridlayout they are only lined up in the middle no matter what i change. How can i set the position and size of my button?
框架内
package Run;
import javax.swing.*;
import ThreeD.Display;
import ThreeD.Launcher;
import TowerDefence.Window;
import java.awt.*;
import java.awt.image.BufferedImage;
public class Frame extends JFrame{
public static String title = "Game";
/*public static int GetScreenWorkingWidth() {
return java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds().width;
}*/
/*public static int GetScreenWorkingHeight() {
return java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds().height;
}*/
//public static Dimension size = new Dimension(GetScreenWorkingWidth(), GetScreenWorkingHeight());
public static Dimension size = new Dimension(1280, 774);
public static void main(String args[]) {
Frame frame = new Frame();
System.out.println("Width of the Frame Size is "+size.width+" pixels");
System.out.println("Height of the Frame Size is "+size.height+" pixels");
}
public Frame() {
setTitle(title);
setSize(size);
setResizable(false);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ThreeDLauncher();
}
public void ThreeDLauncher() {
//setLayout(new GridLayout(1, 1, 0, 0));
setLayout(null);
Launcher launcher = new Launcher();
add(launcher);
setVisible(true);
}
public void TowerDefence() {
setLayout(new GridLayout(1, 1, 0, 0));
Window window = new Window(this);
add(window);
setVisible(true);
}
public void ThreeD() {
BufferedImage cursor = new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB);
Cursor blank = Toolkit.getDefaultToolkit().createCustomCursor(cursor, new Point(0, 0), "blank");
getContentPane().setCursor(blank);
Display display = new Display();
add(display);
setVisible(true);
display.start();
}
}
在启动器中
package ThreeD;
import java.awt.Rectangle;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.UIManager;
public class Launcher extends JPanel{
private JButton play, options, help, mainMenu;
private Rectangle rplay, roptions, rhelp, rmainMenu;
public Launcher() {
drawButtons();
}
private void drawButtons() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(Exception e) {
e.printStackTrace();
}
play = new JButton("Play");
options = new JButton("Options");
help = new JButton("Help");
mainMenu = new JButton("Main Menu");
rplay = new Rectangle(20, 50, 80, 40);
roptions = new Rectangle(20, 50, 80, 40);
rhelp = new Rectangle(20, 50, 80, 40);
rmainMenu = new Rectangle(20, 50, 80, 40);
play.setBounds(rplay);
options.setBounds(roptions);
help.setBounds(rhelp);
mainMenu.setBounds(rmainMenu);
add(play);
add(options);
add(help);
add(mainMenu);
}
}
推荐答案
子容器不继承其父容器的LayoutManager,因此在Launcher的构造函数中,我建议:
Child containers do not inherit their parent's LayoutManager, so in the constructor of Launcher I would recommend:
public Launcher() {
this.setLayout(null);
//this.setLayout(new GroupLayout(2, 2)); // I strongly recommend you try this though and get rid of the setBounds and rects
drawButtons();
}
LayoutManagers布置其组件的布局,而不是组件内部的布局.因此,仅设置框架的布局是不够的.
LayoutManagers layout their components, but not what is inside a component. That's why it isn't enough to just set the frame's layout.
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