JsplitPanel JSplitPane

Java Swing教程 - JSplitPane

JSplitPane有一个拆分器来拆分两个组件。 分割条可以水平或垂直显示。

用户可以向上/向下或向左/向右移动分割条，因此一个组件比另一个组件获得更多的空间。

JSplitPane类提供了许多构造函数。 我们可以使用它的默认构造函数创建它，并使用它的setTopComponent(Component c)添加两个组件，setBottomComponent(Component c)，setLeftComponent(Component c)，setRightComponent(Component c)。

JSplitPane可以以连续或非连续的方式重绘组件。当我们改变分割条的位置。

通过调用JSplitPane的resetToPreferredSizes()方法将分隔符位置重置到该位置。

分隔线位置

使用setDividerLocation(newLocation)更改dividerLocation属性。0.0和1.0，表示JSplitPane容器宽度的百分比。

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSplitPane;

public class Main {
  public static void main(String[] a) {
    JFrame horizontalFrame = new JFrame();
    horizontalFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JComponent topButton = new JButton("Left");
    JComponent bottomButton = new JButton("Right");
    final JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);

    splitPane.setTopComponent(topButton);
    splitPane.setBottomComponent(bottomButton);

    

    horizontalFrame.add(splitPane, BorderLayout.CENTER);
    horizontalFrame.setSize(150, 150);
    horizontalFrame.setVisible(true);

    splitPane.setDividerLocation(0.5);
  }
}

方向

设置方向:JSplitPane.VERTICAL_SPLIT或JSplitPane.HORIZONTAL_SPLIT

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSplitPane;

public class Main {
  public static void main(String[] a) {
    JFrame horizontalFrame = new JFrame();
    horizontalFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    
    JComponent leftButton = new JButton("Left");
    JComponent rightButton = new JButton("Right");
    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
    splitPane.setLeftComponent(leftButton);
    splitPane.setRightComponent(rightButton);
    
    horizontalFrame.add(splitPane, BorderLayout.CENTER);
    horizontalFrame.setSize(150, 150);
    horizontalFrame.setVisible(true);
    
  }
}

可扩展分频器

调整组件大小和使用单触式可扩展分隔线

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSplitPane;

public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Property Split");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
    splitPane.setContinuousLayout(true);
    splitPane.setOneTouchExpandable(true);

    JComponent topComponent = new JButton("A");
    splitPane.setTopComponent(topComponent);

    JComponent bottomComponent = new JButton("B");
    splitPane.setBottomComponent(bottomComponent);

    frame.add(splitPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}

嵌套JSplitPane

import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JSplitPane;
//  w w  w  .  j  a  v  a2  s.c  o m
public class Main{
  
  public static void main(String[] a) {
    int HORIZSPLIT = JSplitPane.HORIZONTAL_SPLIT;

    int VERTSPLIT = JSplitPane.VERTICAL_SPLIT;

    boolean continuousLayout = true;


    JLabel label1 = new JLabel("a");
    JLabel label2 = new JLabel("b");
    JLabel label3 = new JLabel("c");
    JSplitPane splitPane1 = new JSplitPane(VERTSPLIT, continuousLayout, label1, label2);
    splitPane1.setOneTouchExpandable(true);
    splitPane1.setDividerSize(2);
    splitPane1.setDividerLocation(0.5);

    JSplitPane splitPane2 = new JSplitPane(HORIZSPLIT, splitPane1, label3);
    splitPane2.setOneTouchExpandable(true);
    splitPane2.setDividerLocation(0.4);
    splitPane2.setDividerSize(2);

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(splitPane2);
    frame.pack();
    frame.setVisible(true);
  }
}

嵌套JSplitPane...

import java.awt.BorderLayout;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
// w  w  w . j a  va2s .  co m
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSplitPane;

public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Property Split");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
    splitPane.setContinuousLayout(true);
    splitPane.setOneTouchExpandable(true);

    JComponent topComponent = new JButton("A");
    splitPane.setTopComponent(topComponent);

    JComponent bottomComponent = new JButton("B");
    splitPane.setBottomComponent(bottomComponent);

    PropertyChangeListener propertyChangeListener = new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent changeEvent) {
        JSplitPane sourceSplitPane = (JSplitPane) changeEvent.getSource();
        String propertyName = changeEvent.getPropertyName();
        if (propertyName.equals(JSplitPane.LAST_DIVIDER_LOCATION_PROPERTY)) {
          int current = sourceSplitPane.getDividerLocation();
          System.out.println("Current: " + current);
          Integer last = (Integer) changeEvent.getNewValue();
          System.out.println("Last: " + last);
          Integer priorLast = (Integer) changeEvent.getOldValue();
          System.out.println("Prior last: " + priorLast);
        }
      }
    };

    splitPane.addPropertyChangeListener(propertyChangeListener);

    frame.add(splitPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}