[英]2 Synchronized JScrollPanes inside JSplitPane not working properly
我對Swing有問題。 我在JSplitPane中水平放置了兩個JScrollPane並同步了JScrollPanes。 在每個JScrollPane內,我放置了一個JPanel。 兩個JScrollPane之間的同步(即滾動JScrollPane也滾動另一個JScrollPane)正常工作。 但是,當我向左/向右拖動JSplitPane分隔符直到JPanel的某個部分被隱藏時,就會顯示水平滾動條,但是處於禁用狀態。 我無法滾動查看JPanel的隱藏部分。
這是代碼:
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
public class SplitPaneTest extends JFrame {
public SplitPaneTest() {
setTitle( "Splits" );
setDefaultCloseOperation( EXIT_ON_CLOSE );
setSize( 400, 400 );
JPanel panel1 = new JPanel();
panel1.setLayout(new BorderLayout());
panel1.add( new JLabel( "Left panel!" ) );
JScrollPane scrollPane1 = new JScrollPane(panel1);
JPanel panel2 = new JPanel();
panel2.setLayout(new BorderLayout());
panel2.add( new JLabel( "Right Panel" ) );
JScrollPane scrollPane2 = new JScrollPane(panel2);
scrollPane2.getVerticalScrollBar().setModel(scrollPane1.getVerticalScrollBar().getModel());
scrollPane2.getHorizontalScrollBar().setModel(scrollPane1.getHorizontalScrollBar().getModel());
JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, scrollPane1,
scrollPane2);
splitPane.setResizeWeight(0.5);
add(splitPane);
setVisible( true );
}
public static void main( String[] args ) {
new SplitPaneTest();
}
}
當組件的首選大小大於滾動窗格的大小時,將自動顯示滾動條。
您無法共享模型,因為每個滾動條的狀態會有所不同,具體取決於分配給每個滾動窗格的空間大小。 它們唯一同步的時間是分割窗格的分隔線在中間。
因此,您需要在每個滾動窗格的滾動欄中監聽更改,然后嘗試從另一個滾動窗格調整滾動條。
就像是:
import java.awt.BorderLayout;
import javax.swing.*;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import java.awt.event.*;
public class SplitPaneTest2 extends JFrame {
public SplitPaneTest2() {
setTitle( "Splits" );
setDefaultCloseOperation( EXIT_ON_CLOSE );
setSize( 400, 400 );
JPanel panel1 = new JPanel();
panel1.setLayout(new BorderLayout());
panel1.add( new JLabel( "Left panel!11111111111111111111" ) );
JScrollPane scrollPane1 = new JScrollPane(panel1);
JPanel panel2 = new JPanel();
panel2.setLayout(new BorderLayout());
panel2.add( new JLabel( "Right Panel11111111111111111111" ) );
JScrollPane scrollPane2 = new JScrollPane(panel2);
// scrollPane2.getVerticalScrollBar().setModel(scrollPane1.getVerticalScrollBar().getModel());
// scrollPane2.getHorizontalScrollBar().setModel(scrollPane1.getHorizontalScrollBar().getModel());
new ScrollBarSynchronizer(scrollPane1.getHorizontalScrollBar(), scrollPane2.getHorizontalScrollBar());
JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, scrollPane1,
scrollPane2);
splitPane.setResizeWeight(0.5);
add(splitPane);
setVisible( true );
}
public static void main( String[] args ) {
new SplitPaneTest2();
}
static class ScrollBarSynchronizer implements AdjustmentListener
{
JScrollBar[] scrollBars;
public ScrollBarSynchronizer(JScrollBar... scrollBars)
{
this.scrollBars = scrollBars;
for (JScrollBar scrollBar: scrollBars)
scrollBar.addAdjustmentListener( this );
}
@Override
public void adjustmentValueChanged(AdjustmentEvent e)
{
JScrollBar source = (JScrollBar)e.getSource();
int value = e.getValue();
for (JScrollBar scrollBar: scrollBars)
{
if (scrollBar != source)
{
scrollBar.removeAdjustmentListener( this );
scrollBar.setValue( value );
scrollBar.addAdjustmentListener( this );
}
}
}
}
}
您也可以為垂直滾動條創建單獨的同步器。
也許關鍵是, 移動JSplitPane的分隔符不會調整JScrollPane的大小 。 盡管如此,JScrollPane上的VIEW還是被更改,因此滾動條由JScrollPane 顯示(當組件的首選大小大於JScrollPane中JPanel上的視口大小時,滾動條會自動出現 ),但是滾動條是灰色的-因為從JScrollPane的角度來看,不需要滾動(它包含的JPanel並未調整大小,因此不會超過JScrollPane的大小...)
更新這對我有用,解決方案是將盡可能多的內容放入滾動條顯示的JPanel中(快速滾動時字體會被切碎)
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
public class SplitPaneTest extends JFrame {
public SplitPaneTest() {
setTitle( "Splits" );
setDefaultCloseOperation( EXIT_ON_CLOSE );
setSize( 200, 200 );
JPanel panel1 = new JPanel();
panel1.setLayout(new BorderLayout());
panel1.setBackground(Color.YELLOW);
panel1.setLayout(new BorderLayout());
//panel1.setMinimumSize(new Dimension(100,200));
//panel1.setPreferredSize(new Dimension(100,200));
//panel1.revalidate();
panel1.add( new JLabel( "Left panel! fhajsdfasbkfbbsdkjafbkajhbshabshjdfbajsbskjaSK" ) );
JScrollPane scrollPane1 = new JScrollPane(panel1, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
//scrollPane1.setMinimumSize(new Dimension(100,200));
//scrollPane1.setPreferredSize(new Dimension(100,200));
//scrollPane1.revalidate();
JPanel panel2 = new JPanel();
panel2.setLayout(new BorderLayout());
//panel2.setMinimumSize(new Dimension(100,200));
//panel2.setPreferredSize(new Dimension(100,200));
//panel2.revalidate();
panel2.add( new JLabel( "Right Panel dfgasdgsdghsgs<dg<sdgs<dgdsgdfsafasfasfasfsafa" ) );
JScrollPane scrollPane2 = new JScrollPane(panel2, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
//scrollPane2.setMinimumSize(new Dimension(100,200));
//scrollPane2.setPreferredSize(new Dimension(100,200));
//scrollPane2.revalidate();
scrollPane2.getVerticalScrollBar().setModel(scrollPane1.getVerticalScrollBar().getModel());
scrollPane2.getHorizontalScrollBar().setModel(scrollPane1.getHorizontalScrollBar().getModel());
JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, scrollPane1,
scrollPane2);
splitPane.setResizeWeight(0.5);
//splitPane.setContinuousLayout(true);
this.add(splitPane);
this.setVisible( true );
}
public static void main( String[] args ) {
new SplitPaneTest();
}
}
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