Java JEditorPane.removePropertyChangeListener方法代码示例

import javax.swing.JEditorPane; //导入方法依赖的package包/类
@Override
public void propertyChange(PropertyChangeEvent evt) {
    if ("editorKit".equals(evt.getPropertyName())) {
        if (evt.getNewValue() == null && (evt.getSource() instanceof JEditorPane)) {
            JEditorPane pane = (JEditorPane)evt.getSource();
            // It's necessary to detach BasicTextUI's handler from property listening on document
            // to allow GC of the pane and related objects.
            // BTW cannot verify that null kit is present since pane.getEditorKit() lazily creates the kit
            // Unfortunately JTextComponent.getUI() cannot return null since
            // JTextComponent's code assumes it to be non-null (while e.g. JComponent properly checks it for null).
            // Thus use an empty impl of a TextUI.
            pane.setUI(new NullTextUI());
            pane.removePropertyChangeListener(this);
        }
    }
}
 

import javax.swing.JEditorPane; //导入方法依赖的package包/类
void setPane(JEditorPane pane) {
    JEditorPane origPane = getPane();
    if (origPane != null) {
        origPane.removePropertyChangeListener(this);
        origPane.getDocument().removeDocumentListener(this);
    }
    assert (pane != null);
    this.paneRef = new WeakReference<>(pane);
    pane.addPropertyChangeListener(this);
    pane.getDocument().addDocumentListener(this);
    updateState();
}
 

import javax.swing.JEditorPane; //导入方法依赖的package包/类
/**
 * Called when the kit is being removed from the
 * JEditorPane.  This is used to unregister any
 * listeners that were attached.
 *
 * @param c the JEditorPane
 */
public void deinstall(JEditorPane c) {
    c.removeCaretListener(inputAttributeUpdater);
    c.removePropertyChangeListener(inputAttributeUpdater);

    // remove references to current document so it can be collected.
    currentRun = null;
    currentParagraph = null;
}