使用 EventHandler 更改图形
Changing graph with EventHandler
我的程序在用户按下箭头时绘制不同的图形 DOWN。为此，我正在使用 Enum，我将逐一检查并在按下向下箭头时显示所选类型的图表。
此刻我有 3 种类型的图表，每当我遍历所有这些图表回到第一个时，我的程序就会抛出 java.lang.IllegalStateException: Not on FX application thread; currentThread = AWT-EventQueue-0
public class Main extends javax.swing.JFrame {
private static void initAndShowGUI() {
JFrame frame = new JFrame("JavaFX in Swing");
frame.setLayout(new BorderLayout());
Charts charts = new Charts();
frame.setContentPane(charts);
frame.setSize(1024, 720); //Size of dispalayed window
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
//java.awt.EventQueue.invokeLater
public void run() {
initAndShowGUI();
}
});
}
}
public class Charts extends JPanel{
private JFXPanel jfxPanel = new JFXPanel();
private i = 0;
public Charts(){
//show first graph so window won't be empty
drawLineChart(jfxPanel);
registerKeyboardAction((ActionEvent e) -> {
switch(chartParams[i].toString()){
case "BarChart":
drawBarChart(jfxPanel);
i++;
break;
case "PieChart":
drawPieChart(jfxPanel);
i++;
break;
case "LineChart":
i = 0;
drawLineChart(jfxPanel);
break;
default:
i = 0;
System.out.println("Wrong Parameters!");
}
System.out.println(i+ ", ");
}, KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0), WHEN_IN_FOCUSED_WINDOW);
add(jfxPanel,BorderLayout.CENTER);
}
}
所有draw...方法都可以为空。
我收到错误
我收到这个错误。
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: Not on FX application thread; currentThread = AWT-EventQueue-0
at com.sun.javafx.tk.Toolkit.checkFxUserThread(Toolkit.java:279)
at com.sun.javafx.tk.quantum.QuantumToolkit.checkFxUserThread(QuantumToolkit.java:423)
at javafx.scene.Parent.onProposedChange(Parent.java:367)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:329)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:221)
at javafx.scene.Parent.onChanged(Parent.java:246)
at com.sun.javafx.collections.TrackableObservableList.lambda$new(TrackableObservableList.java:45)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
at javafx.collections.ModifiableObservableListBase.addAll(ModifiableObservableListBase.java:102)
at com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:237)
at com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:103)
at javafx.scene.chart.XYChart.<init>(XYChart.java:444)
at javafx.scene.chart.BarChart.<init>(BarChart.java:154)
at javafx.scene.chart.BarChart.<init>(BarChart.java:142)
at cz.test.hibernate.Charts.drawBarChart(Charts.java:210)
at cz.test.hibernate.Charts.lambda$new[=11=](Charts.java:73)
at javax.swing.JComponent$ActionStandin.actionPerformed(JComponent.java:3425)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:307)
at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:250)
at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2974)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2966)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
at javafx.embed.swing.JFXPanel.processKeyEvent(JFXPanel.java:497)
at java.awt.Component.processEvent(Component.java:6310)
at java.awt.Container.processEvent(Container.java:2237)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:835)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1103)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:974)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:800)
at java.awt.Component.dispatchEventImpl(Component.java:4760)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access0(EventQueue.java:97)
at java.awt.EventQueue.run(EventQueue.java:709)
at java.awt.EventQueue.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue.run(EventQueue.java:733)
at java.awt.EventQueue.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)1,
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
当我这样使用 Platform.runLater() 时：
Platform.runLater(new Runnable() {
@Override
//java.awt.EventQueue.invokeLater
public void run() {
initAndShowGUI();
}
});
事情是这样的：
Exception in thread "main" java.lang.IllegalStateException: Toolkit not initialized
at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:273)
at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:268)
at javafx.application.Platform.runLater(Platform.java:83)
at cz.test.hibernate.Main.main(Main.java:109)
我该如何解决这个问题？
这个问题可以是 JavaFX 和 Swing 的组合吗？
好吧，主要错误多于 2 个，然后是 1 个。第一个是我写的命令中显示的，所以我先回答它。
这可以由 Platform.runLater() 修复，如评论中提到的 @john16384。但是这个应该用在class Charts
case "BarChart":
Platform.runLater(new Runnable() {
drawBarChart(jfxPanel);
});
i++;
break;
由此，它将用FX线程修复错误。但是可能会出现下一个错误。
例如，如果你要尝试绘制 BarChart 你必须在这个方法中初始化 CategoryAxis 和 NumberAxis 不像我 当我之前声明并初始化了它们。
因为如果您这样做，这些 Axis 将扩展大约 50%，这意味着您的图形将缩小 50%。
我的程序在用户按下箭头时绘制不同的图形 DOWN。为此，我正在使用 Enum，我将逐一检查并在按下向下箭头时显示所选类型的图表。
此刻我有 3 种类型的图表，每当我遍历所有这些图表回到第一个时，我的程序就会抛出 java.lang.IllegalStateException: Not on FX application thread; currentThread = AWT-EventQueue-0
public class Main extends javax.swing.JFrame {
private static void initAndShowGUI() {
JFrame frame = new JFrame("JavaFX in Swing");
frame.setLayout(new BorderLayout());
Charts charts = new Charts();
frame.setContentPane(charts);
frame.setSize(1024, 720); //Size of dispalayed window
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
//java.awt.EventQueue.invokeLater
public void run() {
initAndShowGUI();
}
});
}
}
public class Charts extends JPanel{
private JFXPanel jfxPanel = new JFXPanel();
private i = 0;
public Charts(){
//show first graph so window won't be empty
drawLineChart(jfxPanel);
registerKeyboardAction((ActionEvent e) -> {
switch(chartParams[i].toString()){
case "BarChart":
drawBarChart(jfxPanel);
i++;
break;
case "PieChart":
drawPieChart(jfxPanel);
i++;
break;
case "LineChart":
i = 0;
drawLineChart(jfxPanel);
break;
default:
i = 0;
System.out.println("Wrong Parameters!");
}
System.out.println(i+ ", ");
}, KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0), WHEN_IN_FOCUSED_WINDOW);
add(jfxPanel,BorderLayout.CENTER);
}
}
所有draw...方法都可以为空。
我收到错误
我收到这个错误。
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: Not on FX application thread; currentThread = AWT-EventQueue-0
at com.sun.javafx.tk.Toolkit.checkFxUserThread(Toolkit.java:279)
at com.sun.javafx.tk.quantum.QuantumToolkit.checkFxUserThread(QuantumToolkit.java:423)
at javafx.scene.Parent.onProposedChange(Parent.java:367)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:329)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:221)
at javafx.scene.Parent.onChanged(Parent.java:246)
at com.sun.javafx.collections.TrackableObservableList.lambda$new(TrackableObservableList.java:45)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
at javafx.collections.ModifiableObservableListBase.addAll(ModifiableObservableListBase.java:102)
at com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:237)
at com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:103)
at javafx.scene.chart.XYChart.<init>(XYChart.java:444)
at javafx.scene.chart.BarChart.<init>(BarChart.java:154)
at javafx.scene.chart.BarChart.<init>(BarChart.java:142)
at cz.test.hibernate.Charts.drawBarChart(Charts.java:210)
at cz.test.hibernate.Charts.lambda$new[=11=](Charts.java:73)
at javax.swing.JComponent$ActionStandin.actionPerformed(JComponent.java:3425)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:307)
at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:250)
at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2974)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2966)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
at javafx.embed.swing.JFXPanel.processKeyEvent(JFXPanel.java:497)
at java.awt.Component.processEvent(Component.java:6310)
at java.awt.Container.processEvent(Container.java:2237)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:835)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1103)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:974)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:800)
at java.awt.Component.dispatchEventImpl(Component.java:4760)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access0(EventQueue.java:97)
at java.awt.EventQueue.run(EventQueue.java:709)
at java.awt.EventQueue.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue.run(EventQueue.java:733)
at java.awt.EventQueue.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)1,
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
当我这样使用 Platform.runLater() 时：
Platform.runLater(new Runnable() {
@Override
//java.awt.EventQueue.invokeLater
public void run() {
initAndShowGUI();
}
});
事情是这样的：
Exception in thread "main" java.lang.IllegalStateException: Toolkit not initialized
at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:273)
at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:268)
at javafx.application.Platform.runLater(Platform.java:83)
at cz.test.hibernate.Main.main(Main.java:109)
我该如何解决这个问题？
这个问题可以是 JavaFX 和 Swing 的组合吗？
好吧，主要错误多于 2 个，然后是 1 个。第一个是我写的命令中显示的，所以我先回答它。
这可以由 Platform.runLater() 修复，如评论中提到的 @john16384。但是这个应该用在class Charts
case "BarChart":
Platform.runLater(new Runnable() {
drawBarChart(jfxPanel);
});
i++;
break;
由此，它将用FX线程修复错误。但是可能会出现下一个错误。
例如，如果你要尝试绘制 BarChart 你必须在这个方法中初始化 CategoryAxis 和 NumberAxis 不像我 当我之前声明并初始化了它们。
因为如果您这样做，这些 Axis 将扩展大约 50%，这意味着您的图形将缩小 50%。