ekit.java

JTREE的例子

            super(insertContentAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if ((target != null) && (e != null)) {
		if ((! target.isEditable()) || (! target.isEnabled())) {
		    target.getToolkit().beep();
		    return;
		}
                String content = e.getActionCommand();
                if (content != null) {
                    target.replaceSelection(content);
                } else {
                    target.getToolkit().beep();
                }
            }
        }
    }

    /**
     * Places a line/paragraph break into the document.
     * If there is a selection, it is removed before
     * the break is added.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     *
     * @see DefaultEditorKit#insertBreakAction
     * @see DefaultEditorKit#getActions
     */
    public static class InsertBreakAction extends TextAction {

        /**
         * Creates this object with the appropriate identifier.
         */
        public InsertBreakAction() {
            super(insertBreakAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {//System.out.println("break");
            Xeditor edit = (Xeditor)getTextComponent(e);
            if (edit != null) {
		if ((! edit.isEditable()) || (! edit.isEnabled())) {
		    edit.getToolkit().beep();
		    return;
		}
                try{
                  int line=edit.getLineOfOffset(edit.getCaret().getDot());
                  int offset=edit.getLineStartOffset(line);
                  String s="";
                  while(true){
                    char ch=(edit.getText(offset,1)).charAt(0);
                    if(ch==' '){
                      s+=" ";    offset++;
                    }else if(ch=='\r') {
                      offset++; continue;
                    }else break;
                  }
                  edit.replaceSelection("\n"+s);
                }catch(Exception xe){
                  xe.printStackTrace();
                  Toolkit.getDefaultToolkit().beep();
                }
            }
        }
    }

    /**
     * Places a tab character into the document. If there
     * is a selection, it is removed before the tab is added.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     *
     * @see DefaultEditorKit#insertTabAction
     * @see DefaultEditorKit#getActions
     */
    public static class InsertTabAction extends TextAction {

        /**
         * Creates this object with the appropriate identifier.
         */
        public InsertTabAction() {
            super(insertTabAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
		if ((! target.isEditable()) || (! target.isEnabled())) {
		    target.getToolkit().beep();
		    return;
		}
                target.replaceSelection("  ");
            }
        }
    }

    /*
     * Deletes the character of content that precedes the
     * current caret position.
     * @see DefaultEditorKit#deletePrevCharAction
     * @see DefaultEditorKit#getActions
     */
    static class DeletePrevCharAction extends TextAction {

        /**
         * Creates this object with the appropriate identifier.
         */
        DeletePrevCharAction() {
            super(deletePrevCharAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            boolean beep = true;
            if ((target != null) && (target.isEditable())) {
                try {
                    Document doc = target.getDocument();
                    Caret caret = target.getCaret();
                    int dot = caret.getDot();
                    int mark = caret.getMark();
                    if (dot != mark) {
                        doc.remove(Math.min(dot, mark), Math.abs(dot - mark));
                        beep = false;
                    } else if (dot > 0) {
                        doc.remove(dot - 1, 1);
                        beep = false;
                    }
                } catch (BadLocationException bl) {
                }
            }
            if (beep) {
                Toolkit.getDefaultToolkit().beep();
            }
        }
    }

    /*
     * Deletes the character of content that follows the
     * current caret position.
     * @see DefaultEditorKit#deleteNextCharAction
     * @see DefaultEditorKit#getActions
     */
    static class DeleteNextCharAction extends TextAction {

        /* Create this object with the appropriate identifier. */
        DeleteNextCharAction() {
            super(deleteNextCharAction);
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            boolean beep = true;
            if ((target != null) && (target.isEditable())) {
                try {
                    Document doc = target.getDocument();
                    Caret caret = target.getCaret();
                    int dot = caret.getDot();
                    int mark = caret.getMark();
                    if (dot != mark) {
                        doc.remove(Math.min(dot, mark), Math.abs(dot - mark));
                        beep = false;
                    } else if (dot < doc.getLength()) {
                        doc.remove(dot, 1);
                        beep = false;
                    }
                } catch (BadLocationException bl) {
                }
            }
            if (beep) {
                Toolkit.getDefaultToolkit().beep();
            }
        }
    }

    /*
     * Sets the editor into read-only mode.
     * @see DefaultEditorKit#readOnlyAction
     * @see DefaultEditorKit#getActions
     */
    static class ReadOnlyAction extends TextAction {

        /* Create this object with the appropriate identifier. */
        ReadOnlyAction() {
            super(readOnlyAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                target.setEditable(false);
            }
        }
    }

    /*
     * Sets the editor into writeable mode.
     * @see DefaultEditorKit#writableAction
     * @see DefaultEditorKit#getActions
     */
    static class WritableAction extends TextAction {

        /* Create this object with the appropriate identifier. */
        WritableAction() {
            super(writableAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                target.setEditable(true);
            }
        }
    }

    /**
     * Cuts the selected region and place its contents
     * into the system clipboard.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     *
     * @see DefaultEditorKit#cutAction
     * @see DefaultEditorKit#getActions
     */
    public static class CutAction extends TextAction {

        /** Create this object with the appropriate identifier. */
        public CutAction() {
            super(cutAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                target.cut();
            }
        }
    }

    /**
     * Coies the selected region and place its contents
     * into the system clipboard.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     *
     * @see DefaultEditorKit#copyAction
     * @see DefaultEditorKit#getActions
     */
    public static class CopyAction extends TextAction {

        /** Create this object with the appropriate identifier. */
        public CopyAction() {
            super(copyAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                target.copy();
            }
        }
    }

    /**
     * Pastes the contents of the system clipboard into the
     * selected region, or before the caret if nothing is
     * selected.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     *
     * @see DefaultEditorKit#pasteAction
     * @see DefaultEditorKit#getActions
     */
    public static class PasteAction extends TextAction {

        /** Create this object with the appropriate identifier. */
        public PasteAction() {
            super(pasteAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                target.paste();
            }
        }
    }

    /**
     * Creates a beep.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     *
     * @see DefaultEditorKit#beepAction
     * @see DefaultEditorKit#getActions
     */
    public static class BeepAction extends TextAction {

        /** Create this object with the appropriate identifier. */
        public BeepAction() {
            super(beepAction);
        }

        /**
         * The operation to perform when this action is triggered.
         *
         * @param e the action event
         */
        public void actionPerformed(ActionEvent e) {
            Toolkit.getDefaultToolkit().beep();
        }
    }

    /**
     * Pages up vertically.  The select version of this action extends
     * the selection, instead of simply moving the caret.
     *
     * @see DefaultEditorKit#pageUpAction
     * @see DefaultEditorKit#selectPageUpAction
     * @see DefaultEditorKit#getActions
     */
    static class PageUpAction extends TextAction {

	/** Create this object with the appropriate identifier. */
	public PageUpAction(String nm, boolean select) {
	    super(nm);