java swing 层叠面板控件的两种方式

Java java swing 层叠面板控件的两种方式

常用的：
边界布局（borderlayout）
流式布局（flowlayout）
网格布局（gridlayout）
权重网格布局（GridBagLayout）
盒子布局（boxlayout），
都是在一个范围内，划出片块，每人分1块使用，如同七巧板。

其它：
ScrollPaneLayout，JScrollPane运用的布局管理器
ViewportLayout，JViewport运用的布局管理器

层叠相关：
CardLayout卡片布局，如同一摞扑克牌，默认只显示最上层的一张。
OverlayLayout默认层叠，比较绕。https://wenku.baidu.com/view/04d10b65757f5acfa1c7aa00b52acfc789eb9fa3.html

空布局，一个容器使用空布局时，其添加的控件会叠加。先加入的在最上，会遮挡后加入的。

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.WindowConstants;
import javax.swing.BorderFactory;
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class NullLayoutPanel extends JFrame {

    public NullLayoutPanel() {
        JButton btn = new JButton("顶层的透明JPanel");
        btn.setBounds(0, 0, 120, 120);

        JPanel panel_1 = new JPanel();
        panel_1.setBorder(BorderFactory.createLineBorder(Color.RED));
        // panel_1.setSize(200, 180); 
        panel_1.setBounds(0, 200, 240, 200);
        panel_1.setOpaque(false); // 背景透明
        panel_1.add(btn);

        JLabel label_2 = new JLabel();
        label_2.setSize(400, 300);
        label_2.setIcon(new ImageIcon("/Users/moonmen/Desktop/图标/color_purple.png"));

        JPanel panel_2 = new JPanel();
        panel_2.setLayout(null); // 必要的空布局
        panel_2.setBounds(0, 0, 2400, 300);
        panel_2.setBorder(BorderFactory.createLineBorder(Color.GREEN));
        panel_2.add(panel_1); // 空布局时后加入的被先加入的遮挡
        panel_2.add(label_2);
        
        add(panel_2);

        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
        setSize(500, 450); // x，y，w，h
        setVisible(true);
    }

    public static void main(String[] args) {
        new AlphaPanel();
    }
}

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.ImageIcon;

import javax.swing.JPanel;

import javax.swing.WindowConstants;

import javax.swing.BorderFactory;

import java.awt.BorderLayout;

import java.awt.CardLayout;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.RenderingHints;

import java.awt.AlphaComposite;

import java.awt.Color;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class NullLayoutPanel extends JFrame {

public NullLayoutPanel() {

JButton btn = new JButton("顶层的透明JPanel");

btn.setBounds(0, 0, 120, 120);

JPanel panel_1 = new JPanel();

panel_1.setBorder(BorderFactory.createLineBorder(Color.RED));

// panel_1.setSize(200, 180);

panel_1.setBounds(0, 200, 240, 200);

panel_1.setOpaque(false); // 背景透明

panel_1.add(btn);

JLabel label_2 = new JLabel();

label_2.setSize(400, 300);

label_2.setIcon(new ImageIcon("/Users/moonmen/Desktop/图标/color_purple.png"));

JPanel panel_2 = new JPanel();

panel_2.setLayout(null); // 必要的空布局

panel_2.setBounds(0, 0, 2400, 300);

panel_2.setBorder(BorderFactory.createLineBorder(Color.GREEN));

panel_2.add(panel_1); // 空布局时后加入的被先加入的遮挡

panel_2.add(label_2);

add(panel_2);

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

setSize(500, 450); // x，y，w，h

setVisible(true);

}

public static void main(String[] args) {

new AlphaPanel();

}

JLayeredPane层级面板，为容器添加了深度，允许组件在需要时互相重叠。

import java.awt.*;
import javax.swing.*;

public class JLayeredPaneTest extends JFrame {

	public JLayeredPaneTest(){
		JLayeredPane jLayeredPane = new JLayeredPane();
		 
		for (int c = 0; c < 10; c++) {
			JLabel jlb = new JLabel("控件-" + c, JLabel.CENTER);
			jlb.setPreferredSize(new Dimension(100, 100));
			jlb.setBackground(new Color((int) (Math.random() * 256 * 256 * 256)));
			jlb.setBorder(BorderFactory.createLineBorder(Color.GREEN));
			jlb.setBounds(50 * c, 25 * c, 100, 50); // 在无layout时起作用, 有layout时无作用
			// jlb.setPreferredSize(new Dimension(100, 100)); // 没有layout则不起作用, 有layout时起作用
			jlb.setOpaque(true); // 设为不透明。JLayeredPane中默认是透明

			// jLayeredPane.add(jlb);
			// jLayeredPane.setLayer(jlb, c);  // 层级。数字越大越顶层
			jLayeredPane.add(jlb, Integer.valueOf(c)); // 如果想在add时直接设置层, 要将int转为Integer 
		}
		
		add(jLayeredPane);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
        setSize(500, 450);
        setVisible(true);
	}
 
	public static void main(String[] arguments) {
		new JLayeredPaneTest();
	}
 
}

import java.awt.*;

import javax.swing.*;

public class JLayeredPaneTest extends JFrame {

public JLayeredPaneTest(){

JLayeredPane jLayeredPane = new JLayeredPane();

for (int c = 0; c < 10; c++) {

JLabel jlb = new JLabel("控件-" + c, JLabel.CENTER);

jlb.setPreferredSize(new Dimension(100, 100));

jlb.setBackground(new Color((int) (Math.random() * 256 * 256 * 256)));

jlb.setBorder(BorderFactory.createLineBorder(Color.GREEN));

jlb.setBounds(50 * c, 25 * c, 100, 50); // 在无layout时起作用, 有layout时无作用

// jlb.setPreferredSize(new Dimension(100, 100)); // 没有layout则不起作用, 有layout时起作用

jlb.setOpaque(true); // 设为不透明。JLayeredPane中默认是透明

// jLayeredPane.add(jlb);

// jLayeredPane.setLayer(jlb, c); // 层级。数字越大越顶层

jLayeredPane.add(jlb, Integer.valueOf(c)); // 如果想在add时直接设置层, 要将int转为Integer

}

add(jLayeredPane);

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

setSize(500, 450);

setVisible(true);

}

public static void main(String[] arguments) {

new JLayeredPaneTest();

}

上面2个示例代码中，顶层透明通常是有效的。但当底层使用了Canvas则“透明”会无效，可以结合“玻璃”实现透明。

import java.awt.*;
import javax.swing.*;

public class JLayeredPaneTest extends JFrame {

	public JLayeredPaneTest(){
        JLabel label_1 = new JLabel("工具条");
        JButton btn = new JButton("顶层的透明JPanel"); 

        JPanel panel_1 = new JPanel(); // 工具条，设为“玻璃”可透视底部Canvas
        panel_1.setLayout(new FlowLayout(FlowLayout.LEFT));
        panel_1.setBorder(BorderFactory.createLineBorder(Color.RED));
        panel_1.setBounds(30, 80, 240, 100);    // 玻璃模式，无效了
        panel_1.setOpaque(false);               // 背景透明。但不能“透视”底部自定义的Canvas
        panel_1.add(label_1);
        panel_1.add(btn);

        JLabel label_2 = new JLabel("视频播放器");
        label_2.setSize(100, 30);
        label_2.setIcon(new ImageIcon("/Users/moonmen/Desktop/图标/color_purple.png"));

        VideoPanel panel_2 = new VideoPanel(); // 视频播放器。内部自定义Canvas绘制，会使顶层面板透明无效
        panel_2.setBounds(0, 0, 450, 300);
        panel_2.setBorder(BorderFactory.createLineBorder(Color.GREEN));
        panel_2.init();
        panel_2.playFrame();
		panel_2.add(label_2);
		
		JLayeredPane jLayeredPane = new JLayeredPane();

		jLayeredPane.add(panel_2, Integer.valueOf(1));
		jLayeredPane.add(panel_1, Integer.valueOf(2)); // 数字越大越顶层
		
		add(jLayeredPane);
        setGlassPane(panel_1);    // 设成透明玻璃，子控件也不可见了
        panel_1.setVisible(true); // 子控件可见了
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
        setSize(500, 450);
        setVisible(true);
	}
 
	public static void main(String[] arguments) {
		new JLayeredPaneTest();
	}
}

import java.awt.*;

import javax.swing.*;

public class JLayeredPaneTest extends JFrame {

public JLayeredPaneTest(){

JLabel label_1 = new JLabel("工具条");

JButton btn = new JButton("顶层的透明JPanel");

JPanel panel_1 = new JPanel(); // 工具条，设为“玻璃”可透视底部Canvas

panel_1.setLayout(new FlowLayout(FlowLayout.LEFT));

panel_1.setBorder(BorderFactory.createLineBorder(Color.RED));

panel_1.setBounds(30, 80, 240, 100); // 玻璃模式，无效了

panel_1.setOpaque(false); // 背景透明。但不能“透视”底部自定义的Canvas

panel_1.add(label_1);

panel_1.add(btn);

JLabel label_2 = new JLabel("视频播放器");

label_2.setSize(100, 30);

label_2.setIcon(new ImageIcon("/Users/moonmen/Desktop/图标/color_purple.png"));

VideoPanel panel_2 = new VideoPanel(); // 视频播放器。内部自定义Canvas绘制，会使顶层面板透明无效

panel_2.setBounds(0, 0, 450, 300);

panel_2.setBorder(BorderFactory.createLineBorder(Color.GREEN));

panel_2.init();

panel_2.playFrame();

panel_2.add(label_2);

JLayeredPane jLayeredPane = new JLayeredPane();

jLayeredPane.add(panel_2, Integer.valueOf(1));

jLayeredPane.add(panel_1, Integer.valueOf(2)); // 数字越大越顶层

add(jLayeredPane);

setGlassPane(panel_1); // 设成透明玻璃，子控件也不可见了

panel_1.setVisible(true); // 子控件可见了

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

setSize(500, 450);

setVisible(true);

}

public static void main(String[] arguments) {

new JLayeredPaneTest();

}

- end

声明

本文由 cuiweiyou 原创，转载请注明出处：http://www.gaohaiyan.com/4140.html

承接App定制、企业web站点、办公系统软件设计开发，外包项目，毕设

OpenCV和Java，Mat和Core
Android自定义组合控件
threejs_r148.使世界坐标系可视标记THREE.AxesHelper带有文字指示
App应用更新流程