basictableui.java

JAVA的一些源码 JAVA2 STANDARD EDITION DEVELOPMENT KIT 5.0

            } else {
                if (isFileList) {
                    maybeStartTimer();
                }
            }

            pressedEvent = null;
            repostEvent(e);
            dispatchComponent = null;
            setValueIsAdjusting(false);
        }

        private void mouseReleasedDND(MouseEvent e) {
            MouseEvent me = DragRecognitionSupport.mouseReleased(e);
            if (me != null) {
                SwingUtilities2.adjustFocus(table);
                if (!dragPressDidSelection) {
                    adjustSelection(me);
                }
            }

            if (!dragStarted) {
                if (isFileList) {
                    maybeStartTimer();
                    return;
                }
                
                Point p = e.getPoint();

                if (pressedEvent != null &&
                        table.rowAtPoint(p) == pressedRow &&
                        table.columnAtPoint(p) == pressedCol &&
                        table.editCellAt(pressedRow, pressedCol, pressedEvent)) {

                    setDispatchComponent(pressedEvent);
                    repostEvent(pressedEvent);

                    // This may appear completely odd, but must be done for backward
                    // compatibility reasons. Developers have been known to rely on
                    // a call to shouldSelectCell after editing has begun.
                    CellEditor ce = table.getCellEditor();
                    if (ce != null) {
                        ce.shouldSelectCell(pressedEvent);
                    }
                }
            }
        }

        public void dragStarting(MouseEvent me) {
            dragStarted = true;

            if (me.isControlDown() && isFileList) {
                table.getSelectionModel().addSelectionInterval(pressedRow,
                                                               pressedRow);
                table.getColumnModel().getSelectionModel().
                    addSelectionInterval(pressedCol, pressedCol);
            }

            pressedEvent = null;
        }

        public void mouseDragged(MouseEvent e) {
            if (SwingUtilities2.shouldIgnore(e, table)) {
                return;
            }

            if (table.getDragEnabled() &&
                    (DragRecognitionSupport.mouseDragged(e, this) || dragStarted)) {

                return;
            }

            mouseDraggedImpl(e);
        }

        public void propertyChange(PropertyChangeEvent event) {
            super.propertyChange(event);

            String changeName = event.getPropertyName();

            if ("Table.isFileList" == changeName) {
                if (isFileList) {
                    table.getSelectionModel().addListSelectionListener(getDragFixHandler());
                } else {
                    table.getSelectionModel().removeListSelectionListener(getDragFixHandler());
                    timer = null;
                }
            } else if ("selectionModel" == changeName) {
                if (isFileList) {
                    ListSelectionModel old = (ListSelectionModel)event.getOldValue();
                    old.removeListSelectionListener(getDragFixHandler());
                    table.getSelectionModel().addListSelectionListener(getDragFixHandler());
                }
            }
        }
    }


    /*
     * Returns true if the given point is outside the preferredSize of the
     * item at the given row of the table.  (Column must be 0).
     * Returns false if the "Table.isFileList" client property is not set.
     */
    private static boolean pointOutsidePrefSize(JTable table,
                                                int row, int column, Point p) {
        if (!Boolean.TRUE.equals(table.getClientProperty("Table.isFileList"))) {
            return false;
        }

        return SwingUtilities2.pointOutsidePrefSize(table, row, column, p);
    }

//
//  Factory methods for the Listeners
//

    private Handler getHandler() {
        if (handler == null) {
            handler = DRAG_FIX ? new DragFixHandler() : new Handler();
        }
        return handler;
    }

    private DragFixHandler getDragFixHandler() {
        // this only called by code that's enabled when DRAG_FIX is on
        assert DRAG_FIX;
        return (DragFixHandler)handler;
    }

    /**
     * Creates the key listener for handling keyboard navigation in the JTable.
     */
    protected KeyListener createKeyListener() {
	return null;
    }

    /**
     * Creates the focus listener for handling keyboard navigation in the JTable.
     */
    protected FocusListener createFocusListener() {
        return getHandler();
    }

    /**
     * Creates the mouse listener for the JTable.
     */
    protected MouseInputListener createMouseInputListener() {
        return getHandler();
    }

//
//  The installation/uninstall procedures and support
//

    public static ComponentUI createUI(JComponent c) {
        return new BasicTableUI();
    }

//  Installation

    public void installUI(JComponent c) {
        table = (JTable)c;

        rendererPane = new CellRendererPane();
        table.add(rendererPane);
        installDefaults();
        installDefaults2();
        installListeners();
        installKeyboardActions();
    }

    /**
     * Initialize JTable properties, e.g. font, foreground, and background.
     * The font, foreground, and background properties are only set if their
     * current value is either null or a UIResource, other properties are set
     * if the current value is null.
     *
     * @see #installUI
     */
    protected void installDefaults() {
        LookAndFeel.installColorsAndFont(table, "Table.background",
                                         "Table.foreground", "Table.font");
        // JTable's original row height is 16.  To correctly display the
        // contents on Linux we should have set it to 18, Windows 19 and
        // Solaris 20.  As these values vary so much it's too hard to
        // be backward compatable and try to update the row height, we're
        // therefor NOT going to adjust the row height based on font.  If the
        // developer changes the font, it's there responsability to update
        // the row height.

        LookAndFeel.installProperty(table, "opaque", Boolean.TRUE);

        Color sbg = table.getSelectionBackground();
        if (sbg == null || sbg instanceof UIResource) {
            table.setSelectionBackground(UIManager.getColor("Table.selectionBackground"));
        }

        Color sfg = table.getSelectionForeground();
        if (sfg == null || sfg instanceof UIResource) {
            table.setSelectionForeground(UIManager.getColor("Table.selectionForeground"));
        }

        Color gridColor = table.getGridColor();
        if (gridColor == null || gridColor instanceof UIResource) {
            table.setGridColor(UIManager.getColor("Table.gridColor"));
        }

        // install the scrollpane border
        Container parent = table.getParent();  // should be viewport
        if (parent != null) {
            parent = parent.getParent();  // should be the scrollpane
            if (parent != null && parent instanceof JScrollPane) {
                LookAndFeel.installBorder((JScrollPane)parent, "Table.scrollPaneBorder");
            }
        }

        isFileList = Boolean.TRUE.equals(table.getClientProperty("Table.isFileList"));
    }

    private void installDefaults2() {
	TransferHandler th = table.getTransferHandler();
	if (th == null || th instanceof UIResource) {
	    table.setTransferHandler(defaultTransferHandler);
	}
	DropTarget dropTarget = table.getDropTarget();
	if (dropTarget instanceof UIResource) {
            if (defaultDropTargetListener == null) {
                defaultDropTargetListener = 
                    new TableDropTargetListener();
            }
	    try {
		dropTarget.addDropTargetListener(defaultDropTargetListener);
	    } catch (TooManyListenersException tmle) {
		// should not happen... swing drop target is multicast
	    }
	}
    }

    /**
     * Attaches listeners to the JTable.
     */
    protected void installListeners() {
        focusListener = createFocusListener();
        keyListener = createKeyListener();
        mouseInputListener = createMouseInputListener();

        table.addFocusListener(focusListener);
        table.addKeyListener(keyListener);
        if (!DRAG_FIX) {
            table.addMouseListener(defaultDragRecognizer);
            table.addMouseMotionListener(defaultDragRecognizer);
        }
        table.addMouseListener(mouseInputListener);
        table.addMouseMotionListener(mouseInputListener);
        table.addPropertyChangeListener(getHandler());
        if (DRAG_FIX && isFileList) {
            table.getSelectionModel().addListSelectionListener(getDragFixHandler());
        }
    }

    /**
     * Register all keyboard actions on the JTable.
     */
    protected void installKeyboardActions() {
        LazyActionMap.installLazyActionMap(table, BasicTableUI.class,
                "Table.actionMap");

	InputMap inputMap = getInputMap(JComponent.
					WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
	SwingUtilities.replaceUIInputMap(table,
				JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
				inputMap);
    }

    InputMap getInputMap(int condition) {
        if (condition == JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) {
            InputMap keyMap =
                (InputMap)DefaultLookup.get(table, this,
                                            "Table.ancestorInputMap");
            return keyMap;
        }
        return null;
    }

    static void loadActionMap(LazyActionMap map) {
        // IMPORTANT: There is a very close coupling between the parameters
        // passed to the Actions constructor. Only certain parameter
        // combinations are supported. For example, the following Action would
        // not work as expected:
        //     new Actions(Actions.NEXT_ROW_CELL, 1, 4, false, true)
        // Actions which move within the selection only (having a true
        // inSelection parameter) require that one of dx or dy be
        // zero and the other be -1 or 1. The point of this warning is
        // that you should be very careful about making sure a particular
        // combination of parameters is supported before changing or
        // adding anything here.
        
        map.put(new Actions(Actions.NEXT_COLUMN, 1, 0,
                false, false));
        map.put(new Actions(Actions.NEXT_COLUMN_CHANGE_LEAD, 1, 0,
                false, false));
        map.put(new Actions(Actions.PREVIOUS_COLUMN, -1, 0,
                false, false));
        map.put(new Actions(Actions.PREVIOUS_COLUMN_CHANGE_LEAD, -1, 0,
                false, false));
        map.put(new Actions(Actions.NEXT_ROW, 0, 1,
                false, false));
        map.put(new Actions(Actions.NEXT_ROW_CHANGE_LEAD, 0, 1,
                false, false));
        map.put(new Actions(Actions.PREVIOUS_ROW, 0, -1,
                false, false));
        map.put(new Actions(Actions.PREVIOUS_ROW_CHANGE_LEAD, 0, -1,
                false, false));
        map.put(new Actions(Actions.NEXT_COLUMN_EXTEND_SELECTION,
                1, 0, true, false));
        map.put(new Actions(Actions.PREVIOUS_COLUMN_EXTEND_SELECTION,
                -1, 0, true, false));
        map.put(new Actions(Actions.NEXT_ROW_EXTEND_SELECTION,
                0, 1, true, false));
        map.put(new Actions(Actions.PREVIOUS_ROW_EXTEND_SELECTION,
                0, -1, true, false));
        map.put(new Actions(Actions.SCROLL_UP_CHANGE_SELECTION,
	        false, false, true, false));
        map.put(new Actions(Actions.SCROLL_DOWN_CHANGE_SELECTION,
	        false, true, true, false));
        map.put(new Actions(Actions.FIRST_COLUMN,
	        false, false, false, true));
        map.put(new Actions(Actions.LAST_COLUMN,
	        false, true, false, true));

        map.put(new Actions(Actions.SCROLL_UP_EXTEND_SELECTION,
		true, false, true, false));
        map.put(new Actions(Actions.SCROLL_DOWN_EXTEND_SELECTION,
                true, true, true, false));
        map.put(new Acti