Java 尝试使用ComponentAdapter调整面板大小(不工作)
当网格对象实例化时,将创建JFrame和JPanel。在JPanel上绘制线以创建方形网格。理想情况下,如果调整窗口大小,网格将缩放Java 尝试使用ComponentAdapter调整面板大小(不工作),java,swing,jframe,resize,jpanel,Java,Swing,Jframe,Resize,Jpanel,当网格对象实例化时,将创建JFrame和JPanel。在JPanel上绘制线以创建方形网格。理想情况下,如果调整窗口大小,网格将缩放 import javax.swing.JPanel; import javax.swing.JFrame; import java.awt.Graphics; import java.awt.Color; import java.awt.event.ComponentListener; import java.awt.event.ComponentEvent; i
import javax.swing.JPanel;
import javax.swing.JFrame;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.event.ComponentListener;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentAdapter;
public class Grid {
private int lines;
private int space;
public static final int DEFAULT_LINES = 5;
public static final int DEFAULT_SPACE = 5;
private JPanel panel = new GridPanel();
private JFrame frame;
public Grid(String name, int lines, int space) {
this.frame = new JFrame(name);
this.lines = lines;
this.space = space;
this.frame.setSize((lines * space), (lines * space));
}
private class GridPanel extends JPanel {
private int start = 0;
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
int end = (lines * space);
g.setColor(Color.BLACK);
for (int i = 0; i < lines; i++) {
int crawl = (space * i);
g.drawLine(start, crawl, end, crawl);
g.drawLine(crawl, start, crawl, end);
}
}
}
/*private class GridHandler extends ComponentAdapter {
@Override
public void componentResized(ComponentEvent e) {
super.componentResized(e);
setSpace();
frame.repaint();
frame.revalidate();
}
}*/
public void setSpace() {
space = (frame.getSize().width * frame.getSize().height) / lines;
}
public void run() {
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.add(panel);
//frame.addComponentListener(new GridHandler());
frame.setVisible(true);
}
}
public class Run {
public static final int ONE_LINES = 15;
public static final int ONE_SPACE = 20;
public static final int TWO_LINES = 35;
public static final int TWO_SPACE = 16;
public static void main(String[] args) {
Grid grid1 = new Grid("Grid One", ONE_LINES, ONE_SPACE);
Grid grid2 = new Grid("Grid Two", TWO_LINES, TWO_SPACE);
grid1.run();
grid2.run();
}
}
import javax.swing.JPanel;
导入javax.swing.JFrame;
导入java.awt.Graphics;
导入java.awt.Color;
导入java.awt.event.ComponentListener;
导入java.awt.event.ComponentEvent;
导入java.awt.event.ComponentAdapter;
公共类网格{
专用int线;
私有int空间;
公共静态最终整数默认值_行=5;
公共静态final int DEFAULT_SPACE=5;
private JPanel panel=new GridPanel();
私有JFrame;
公共网格(字符串名称、整数行、整数空间){
this.frame=新JFrame(名称);
这条线=线;
这个空间=空间;
此.frame.setSize((行*空格),(行*空格));
}
私有类GridPanel扩展了JPanel{
私有int start=0;
@凌驾
公共组件(图形g){
超级组件(g);
int end=(行*空格);
g、 设置颜色(颜色为黑色);
对于(int i=0;i
这是仅有的两个正在使用的文件。处理程序当前被注释掉,代码执行预期的操作。将创建两个带有网格的窗口。但是,当处理程序实现时,网格不再显示。处理程序的正确实现是什么?对于任何关心的人来说,这是一个可行的解决方案。事实证明,不需要组件化的事件处理程序。重新调整JFrame的大小时,将自动执行paintComponent 下面的代码创建两个单独的JFrame。每个JFrame包含一个JPanel。在JPanel上绘制一个独特的正方形网格。如果重新调整JFrame的大小,网格也将重新调整大小(同时仍保持方形)
为什么不使用组件的
宽度
和高度
并在调用paintComponent
时计算网格大小?什么?谢谢你的建议!我已经在下面发布了我的解决方案(它使用了宽度
和高度
,正如您所建议的),我发现这样的代码更具可读性。再次感谢!
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.*;
public class Grid extends JPanel {
private static final int DEFAULT_COUNT = 10;
private static final int DEFAULT_SIZE = 100;
private int count;
public Grid(int count, int size) {
if (size < 1) {
this.count = DEFAULT_COUNT;
this.setPreferredSize(new Dimension(DEFAULT_SIZE, DEFAULT_SIZE));
} else {
this.count = count;
this.setPreferredSize(new Dimension(size, size));
}
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D graphics = (Graphics2D) g;
graphics.setColor(Color.black);
Dimension size = getSize();
int w = size.width;
int h = size.height;
if (w > h) {
w = h;
} else if (h > w) {
h = w;
}
int spaceWidth = (int)((double)w / count);
int spaceHeight = (int)((double)h / count);
for (int row = 0; row <= count; row++) {
int y = (row * spaceHeight);
int x = (row * spaceWidth);
graphics.drawLine(0, y, (spaceWidth * count), y);
graphics.drawLine(x, 0, x, (spaceHeight * count));
}
}
}
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.*;
public class Test {
public static final int COUNT_1 = (-5);
public static final int SIZE_1 = 4;
public static final int COUNT_2 = 35;
public static final int SIZE_2 = 16;
public static void main(String[] args) {
int area1 = COUNT_1 * SIZE_1;
int area2 = COUNT_2 * SIZE_2;
Grid grid = new Grid(COUNT_1, area1);
JFrame frame = new JFrame("Grid");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.add(grid);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
Grid grid2 = new Grid(COUNT_2, area2);
JFrame frame2 = new JFrame("Grid");
frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame2.add(grid2);
frame2.pack();
frame2.setLocationRelativeTo(null);
frame2.setVisible(true);
}
}