Java 如何将缩放和平移功能添加到JPanel?
所以我有一个Java程序,它使用网格袋布局来创建单元格(如图形纸),如果鼠标在其中一个单元格上,那么单元格将改变其颜色。我想实现一个缩放功能,使用鼠标滚轮。此外,我还想添加一个功能,当您放大时,您可以通过单击并拖动放大的画布进行平移。要指定左右平移,请考虑单击并拖动以在放大的地图周围移动,如谷歌地图Java 如何将缩放和平移功能添加到JPanel?,java,swing,gridbaglayout,zooming,pan,Java,Swing,Gridbaglayout,Zooming,Pan,所以我有一个Java程序,它使用网格袋布局来创建单元格(如图形纸),如果鼠标在其中一个单元格上,那么单元格将改变其颜色。我想实现一个缩放功能,使用鼠标滚轮。此外,我还想添加一个功能,当您放大时,您可以通过单击并拖动放大的画布进行平移。要指定左右平移,请考虑单击并拖动以在放大的地图周围移动,如谷歌地图 import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.Eve
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.Border;
import javax.swing.border.MatteBorder;
public class Testing {
public int RowI = 10;
public int ColI = 10;
public static void main(String[] args) {
new Testing();
}
public Testing() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
for (int row = 0; row < RowI; row++) {
for (int col = 0; col < ColI; col++) {
gbc.gridx = col;
gbc.gridy = row;
CellPane cellPane = new CellPane();
Border border = null;
if (row < 4) {
if (col < 4) {
border = new MatteBorder(1, 1, 0, 0, Color.GRAY);
} else {
border = new MatteBorder(1, 1, 0, 1, Color.GRAY);
}
} else {
if (col < 4) {
border = new MatteBorder(1, 1, 1, 0, Color.GRAY);
} else {
border = new MatteBorder(1, 1, 1, 1, Color.GRAY);
}
}
cellPane.setBorder(border);
add(cellPane, gbc);
}
}
}
}
public class CellPane extends JPanel { //The CellPane class changes the color of an individual cell based on whether or no the mouse I on a cell.
private Color defaultBackground; //This is a private color that is only used by the mouseListener.
public CellPane() {
addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) { //If mouse is on cell turn cell the given color(in this case green).
defaultBackground = getBackground();
setBackground(Color.GREEN);
}
@Override
public void mouseExited(MouseEvent e) { //If mouse is not on cell revert to default background.
setBackground(defaultBackground);
}
});
}
@Override
public Dimension getPreferredSize() {
return new Dimension(50, 50); //Cell size on x and y axis.
}
}
}
导入java.awt.BorderLayout;
导入java.awt.Color;
导入java.awt.Dimension;
导入java.awt.EventQueue;
导入java.awt.GridBagConstraints;
导入java.awt.GridBagLayout;
导入java.awt.event.MouseAdapter;
导入java.awt.event.MouseEvent;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
导入javax.swing.UIManager;
导入javax.swing.UnsupportedLookAndFeelException;
导入javax.swing.border.border;
导入javax.swing.border.MatteBorder;
公共类测试{
公共int RowI=10;
公众指数=10;
公共静态void main(字符串[]args){
新测试();
}
公共测试(){
invokeLater(新的Runnable(){
@凌驾
公开募捐{
试一试{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(ClassNotFoundException |实例化Exception | IllegalacessException |不支持ookandfeelException ex){
}
JFrame=新JFrame(“测试”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(新的BorderLayout());
frame.add(newtestpane());
frame.pack();
frame.setLocationRelativeTo(空);
frame.setVisible(true);
}
});
}
公共类TestPane扩展了JPanel{
公共测试窗格(){
setLayout(新的GridBagLayout());
GridBagConstraints gbc=新的GridBagConstraints();
对于(int row=0;row
可能会回答您所寻找的。可能会回答您所寻找的。好吧,根据您的示例,我能想到的简单解决方案之一是简单地“缩放”单元窗格,从而更改组件的
首选大小。将其与JScollPane
相结合,您基本上就可以满足您的需求了。同时,也可以检查该方法。根据您的示例,在我能想到的简单解决方案中,可以简单地“缩放”单元格窗格
,从而更改组件的首选大小
。将其与一个JScollPane
结合,您基本上就有了自己的需求,也可以查看方法。