basictableui.java

JAVA的一些源码 JAVA2 STANDARD EDITION DEVELOPMENT KIT 5.0

        }
    }


//
//  The Table's Key listener
//

    /**
     * This inner class is marked "public" due to a compiler bug.
     * This class should be treated as a "protected" inner class.
     * Instantiate it only within subclasses of BasicTableUI.
     * <p>As of Java 2 platform v1.3 this class is no longer used.
     * Instead <code>JTable</code>
     * overrides <code>processKeyBinding</code> to dispatch the event to
     * the current <code>TableCellEditor</code>.
     */
     public class KeyHandler implements KeyListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this      
        // class calls into the Handler.
        public void keyPressed(KeyEvent e) {
            getHandler().keyPressed(e);
        }

        public void keyReleased(KeyEvent e) {
            getHandler().keyReleased(e);
        }

        public void keyTyped(KeyEvent e) {
            getHandler().keyTyped(e);
        }
    }

//
//  The Table's focus listener
//

    /**
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicTableUI.
     */
    public class FocusHandler implements FocusListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this      
        // class calls into the Handler.
        public void focusGained(FocusEvent e) {
            getHandler().focusGained(e);
        }

        public void focusLost(FocusEvent e) {
            getHandler().focusLost(e);
        }
    }

//
//  The Table's mouse and mouse motion listeners
//

    /**
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicTableUI.
     */
    public class MouseInputHandler implements MouseInputListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this      
        // class calls into the Handler.
        public void mouseClicked(MouseEvent e) {
            getHandler().mouseClicked(e);
        }

        public void mousePressed(MouseEvent e) {
            getHandler().mousePressed(e);
	}

        public void mouseReleased(MouseEvent e) {
            getHandler().mouseReleased(e);
        }

        public void mouseEntered(MouseEvent e) {
            getHandler().mouseEntered(e);
        }

        public void mouseExited(MouseEvent e) {
            getHandler().mouseExited(e);
        }

        public void mouseMoved(MouseEvent e) {
            getHandler().mouseMoved(e);
        }

        public void mouseDragged(MouseEvent e) {
            getHandler().mouseDragged(e);
        }
    }

    private class Handler implements FocusListener, MouseInputListener,
            PropertyChangeListener {

        // FocusListener
        private void repaintLeadCell( ) {
            int lr = getAdjustedLead(table, true);
            int lc = getAdjustedLead(table, false);

            if (lr < 0 || lc < 0) {
                return;
            }

            Rectangle dirtyRect = table.getCellRect(lr, lc, false);
            table.repaint(dirtyRect);
        }

        public void focusGained(FocusEvent e) {
            repaintLeadCell();
        }

        public void focusLost(FocusEvent e) {
            repaintLeadCell();
        }


        // KeyListener
        public void keyPressed(KeyEvent e) { }

        public void keyReleased(KeyEvent e) { }

        public void keyTyped(KeyEvent e) {
            KeyStroke keyStroke = KeyStroke.getKeyStroke(e.getKeyChar(),
                    e.getModifiers());

            // We register all actions using ANCESTOR_OF_FOCUSED_COMPONENT
            // which means that we might perform the appropriate action
            // in the table and then forward it to the editor if the editor
            // had focus. Make sure this doesn't happen by checking our
            // InputMaps.
	    InputMap map = table.getInputMap(JComponent.WHEN_FOCUSED);
	    if (map != null && map.get(keyStroke) != null) {
		return;
	    }
	    map = table.getInputMap(JComponent.
				  WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
	    if (map != null && map.get(keyStroke) != null) {
		return;
	    }

	    keyStroke = KeyStroke.getKeyStrokeForEvent(e);

            // The AWT seems to generate an unconsumed \r event when
            // ENTER (\n) is pressed.
            if (e.getKeyChar() == '\r') {
                return;
            }

            int leadRow = getAdjustedLead(table, true);
            int leadColumn = getAdjustedLead(table, false);
            if (leadRow != -1 && leadColumn != -1 && !table.isEditing()) {
                if (!table.editCellAt(leadRow, leadColumn)) {
                    return;
                }
            }

            // Forwarding events this way seems to put the component
            // in a state where it believes it has focus. In reality
            // the table retains focus - though it is difficult for
            // a user to tell, since the caret is visible and flashing.

            // Calling table.requestFocus() here, to get the focus back to
            // the table, seems to have no effect.

            Component editorComp = table.getEditorComponent();
            if (table.isEditing() && editorComp != null) {
                if (editorComp instanceof JComponent) {
                    JComponent component = (JComponent)editorComp;
		    map = component.getInputMap(JComponent.WHEN_FOCUSED);
		    Object binding = (map != null) ? map.get(keyStroke) : null;
		    if (binding == null) {
			map = component.getInputMap(JComponent.
					 WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
			binding = (map != null) ? map.get(keyStroke) : null;
		    }
		    if (binding != null) {
			ActionMap am = component.getActionMap();
			Action action = (am != null) ? am.get(binding) : null;
			if (action != null && SwingUtilities.
			    notifyAction(action, keyStroke, e, component,
					 e.getModifiers())) {
			    e.consume();
			}
		    }
                }
            }
        }


        // MouseInputListener

        // Component receiving mouse events during editing.
        // May not be editorComponent.
        protected Component dispatchComponent;
	private boolean selectedOnPress;

        public void mouseClicked(MouseEvent e) {}

        protected void setDispatchComponent(MouseEvent e) {
            Component editorComponent = table.getEditorComponent();
            Point p = e.getPoint();
            Point p2 = SwingUtilities.convertPoint(table, p, editorComponent);
            dispatchComponent =
                    SwingUtilities.getDeepestComponentAt(editorComponent,
                            p2.x, p2.y);
            SwingUtilities2.setSkipClickCount(dispatchComponent,
                                              e.getClickCount() - 1);
        }

        protected boolean repostEvent(MouseEvent e) {
	    // Check for isEditing() in case another event has
	    // caused the editor to be removed. See bug #4306499.
            if (dispatchComponent == null || !table.isEditing()) {
                return false;
            }
            MouseEvent e2 = SwingUtilities.convertMouseEvent(table, e,
                    dispatchComponent);
            dispatchComponent.dispatchEvent(e2);
            return true;
        }

        protected void setValueIsAdjusting(boolean flag) {
            table.getSelectionModel().setValueIsAdjusting(flag);
            table.getColumnModel().getSelectionModel().
                    setValueIsAdjusting(flag);
        }

	private boolean shouldIgnore0(MouseEvent e) {
            return e.isConsumed() || SwingUtilities2.shouldIgnore(e, table);
	}

        public void mousePressed(MouseEvent e) {
	    if (e.isConsumed()) {
		selectedOnPress = false;
		return;
	    }
	    selectedOnPress = true;
	    adjustFocusAndSelection(e);
	}

	void adjustFocusAndSelection(MouseEvent e) {
	    if (shouldIgnore0(e)) {
	        return;
	    }

            Point p = e.getPoint();
            int row = table.rowAtPoint(p);
            int column = table.columnAtPoint(p);
            // Fix for 4835633
            if (pointOutsidePrefSize(table, row, column, p)) { 
                // If shift is down in multi-select, we should just return.
                // For single select or non-shift-click, clear the selection
                if (e.getID() ==  MouseEvent.MOUSE_PRESSED &&
                    (!e.isShiftDown() ||
                     table.getSelectionModel().getSelectionMode() ==
                     ListSelectionModel.SINGLE_SELECTION)) {
                    table.clearSelection();
                    TableCellEditor tce = table.getCellEditor();
                    if (tce != null) {
                        tce.stopCellEditing();
                    }
                }
                return;
            }
	    // The autoscroller can generate drag events outside the
            // table's range.
            if ((column == -1) || (row == -1)) {
                return;
            }

            if (table.editCellAt(row, column, e)) {
                setDispatchComponent(e);
                repostEvent(e);
            }
	    else {
                SwingUtilities2.adjustFocus(table);
	    }

            CellEditor editor = table.getCellEditor();
            if (editor == null || editor.shouldSelectCell(e)) {
		boolean adjusting = (e.getID() == MouseEvent.MOUSE_PRESSED) ?
                        true : false;
                setValueIsAdjusting(adjusting);
                makeSelectionChange(row, column, e);
	    }
        }

        protected void makeSelectionChange(int row, int column, MouseEvent e) {
            boolean ctrl = e.isControlDown();

            // Apply the selection state of the anchor to all cells between it and the
            // current cell, and then select the current cell.
            // For mustang, where API changes are allowed, this logic will moved to
            // JTable.changeSelection()
            if (ctrl && e.isShiftDown()) {
                ListSelectionModel rm = table.getSelectionModel();
                ListSelectionModel cm = table.getColumnModel().getSelectionModel();
                int anchorRow = rm.getAnchorSelectionIndex();
                int anchorCol = cm.getAnchorSelectionIndex();

                boolean anchorSelected = true;
                if (anchorRow == -1 || anchorRow >= table.getRowCount()) {
                    anchorRow = 0;
                    anchorSelected = false;
                }

                if (anchorCol == -1 || anchorCol >= table.getColumnCount()) {
                    anchorCol = 0;
                    anchorSelected = false;
                }

                if (anchorSelected && table.isCellSelected(anchorRow, anchorCol)) {
                    rm.addSelectionInterval(anchorRow, row);
                    cm.addSelectionInterval(anchorCol, column);
                } else {
                    rm.removeSelectionInterval(anchorRow, row);
                    cm.removeSelectionInterval(anchorCol, column);

                    // This is only to match the windows explorer behavior in JFileChooser
                    if (isFileList) {
                        rm.addSelectionInterval(row, row);
                        rm.setAnchorSelectionIndex(anchorRow);
                        cm.addSelectionInterval(column, column);
                        cm.setAnchorSelectionIndex(anchorCol);
                    }
                }
            } else {