ekit.java

JTREE的例子

                try {
                    int offs = target.getCaretPosition();
                    offs = Utilities.getNextWord(target, offs);
                    if (select) {
                        target.moveCaretPosition(offs);
                    } else {
                        target.setCaretPosition(offs);
                    }
                } catch (BadLocationException bl) {
                    target.getToolkit().beep();
                }
            }
        }

        private boolean select;
    }

    /*
     * Position the caret to the beginning of the line.
     * @see DefaultEditorKit#beginLineAction
     * @see DefaultEditorKit#selectBeginLineAction
     * @see DefaultEditorKit#getActions
     */
    static class BeginLineAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        BeginLineAction(String nm, boolean select) {
            super(nm);
            this.select = select;
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                try {
                    int offs = target.getCaretPosition();
                    int begOffs = Utilities.getRowStart(target, offs);
                    if (select) {
                        target.moveCaretPosition(begOffs);
                    } else {
                        target.setCaretPosition(begOffs);
                    }
                } catch (BadLocationException bl) {
                    target.getToolkit().beep();
                }
            }
        }

        private boolean select;
    }

    /*
     * Position the caret to the end of the line.
     * @see DefaultEditorKit#endLineAction
     * @see DefaultEditorKit#selectEndLineAction
     * @see DefaultEditorKit#getActions
     */
    static class EndLineAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        EndLineAction(String nm, boolean select) {
            super(nm);
            this.select = select;
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {//System.out.println("endline");
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                try {
                    int offs = target.getCaretPosition();
                    int endOffs = Utilities.getRowEnd(target, offs);
                    if (select) {
                        target.moveCaretPosition(endOffs);
                    } else {
                        target.setCaretPosition(endOffs);
                    }
                } catch (BadLocationException bl) {
                    target.getToolkit().beep();
                }
            }
        }

        private boolean select;
    }

    /*
     * Position the caret to the beginning of the paragraph.
     * @see DefaultEditorKit#beginParagraphAction
     * @see DefaultEditorKit#selectBeginParagraphAction
     * @see DefaultEditorKit#getActions
     */
    static class BeginParagraphAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        BeginParagraphAction(String nm, boolean select) {
            super(nm);
            this.select = select;
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                int offs = target.getCaretPosition();
                Element elem = Utilities.getParagraphElement(target, offs);
                offs = elem.getStartOffset();
                if (select) {
                    target.moveCaretPosition(offs);
                } else {
                    target.setCaretPosition(offs);
                }
            }
        }

        private boolean select;
    }

    /*
     * Position the caret to the end of the paragraph.
     * @see DefaultEditorKit#endParagraphAction
     * @see DefaultEditorKit#selectEndParagraphAction
     * @see DefaultEditorKit#getActions
     */
    static class EndParagraphAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        EndParagraphAction(String nm, boolean select) {
            super(nm);
            this.select = select;
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                int offs = target.getCaretPosition();
                Element elem = Utilities.getParagraphElement(target, offs);
                offs = Math.min(target.getDocument().getLength(),
				elem.getEndOffset());
                if (select) {
                    target.moveCaretPosition(offs);
                } else {
                    target.setCaretPosition(offs);
                }
            }
        }

        private boolean select;
    }

    /*
     * Move the caret to the begining of the document.
     * @see DefaultEditorKit#beginAction
     * @see DefaultEditorKit#getActions
     */
    static class BeginAction extends TextAction {

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

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                if (select) {
                    target.moveCaretPosition(0);
                } else {
                    target.setCaretPosition(0);
                }
            }
        }

        private boolean select;
    }

    /*
     * Move the caret to the end of the document.
     * @see DefaultEditorKit#endAction
     * @see DefaultEditorKit#getActions
     */
    static class EndAction extends TextAction {

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

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                Document doc = target.getDocument();
                int dot = doc.getLength();
                if (select) {
                    target.moveCaretPosition(dot);
                } else {
                    target.setCaretPosition(dot);
                }
            }
        }

        private boolean select;
    }

    /*
     * Select the word around the caret
     * @see DefaultEditorKit#endAction
     * @see DefaultEditorKit#getActions
     */
    static class SelectWordAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        SelectWordAction() {
            super(selectWordAction);
            start = new BeginWordAction("pigdog", false);
            end = new EndWordAction("pigdog", true);
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            start.actionPerformed(e);
            end.actionPerformed(e);
        }

        private Action start;
        private Action end;
    }

    /*
     * Select the line around the caret
     * @see DefaultEditorKit#endAction
     * @see DefaultEditorKit#getActions
     */
    static class SelectLineAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        SelectLineAction() {
            super(selectLineAction);
            start = new BeginLineAction("pigdog", false);
            end = new EndLineAction("pigdog", true);
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            start.actionPerformed(e);
            end.actionPerformed(e);
        }

        private Action start;
        private Action end;
    }

    /*
     * Select the paragraph around the caret
     * @see DefaultEditorKit#endAction
     * @see DefaultEditorKit#getActions
     */
    static class SelectParagraphAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        SelectParagraphAction() {
            super(selectParagraphAction);
            start = new BeginParagraphAction("pigdog", false);
            end = new EndParagraphAction("pigdog", true);
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            start.actionPerformed(e);
            end.actionPerformed(e);
        }

        private Action start;
        private Action end;
    }

    /*
     * Select the entire document
     * @see DefaultEditorKit#endAction
     * @see DefaultEditorKit#getActions
     */
    static class SelectAllAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         * @param nm  the name of the action, Action.NAME.
         * @param select whether to extend the selection when
         *  changing the caret position.
         */
        SelectAllAction() {
            super(selectAllAction);
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                Document doc = target.getDocument();
                target.setCaretPosition(0);
                target.moveCaretPosition(doc.getLength());
            }
        }

    }

    /*
     * Remove the selection, if any.
     * @see DefaultEditorKit#unselectAction
     * @see DefaultEditorKit#getActions
     */
    static class UnselectAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         */
        UnselectAction() {
            super(unselectAction);
        }

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

    }

    /*
     * Toggles the ComponentOrientation of the text component.
     * @see DefaultEditorKit#toggleComponentOrientationAction
     * @see DefaultEditorKit#getActions
     */
    static class ToggleComponentOrientationAction extends TextAction {

        /**
         * Create this action with the appropriate identifier.
         */
        ToggleComponentOrientationAction() {
            super(toggleComponentOrientationAction);
        }

        /** The operation to perform when this action is triggered. */
        public void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            if (target != null) {
                ComponentOrientation last = target.getComponentOrientation();
                ComponentOrientation next;
                if( last == ComponentOrientation.RIGHT_TO_LEFT )
                    next = ComponentOrientation.LEFT_TO_RIGHT;
                else
                    next = ComponentOrientation.RIGHT_TO_LEFT;
                target.setComponentOrientation(next);
                target.repaint();
            }
        }
    }
}