Java SwingConstants.NORTH_EAST属性代码示例

private static void checkSupported(int constraint) {
    if (constraint == SwingConstants.NORTH) return;
    if (constraint == SwingConstants.WEST) return;
    if (constraint == SwingConstants.SOUTH) return;
    if (constraint == SwingConstants.EAST) return;
    if (constraint == SwingConstants.NORTH_WEST) return;
    if (constraint == SwingConstants.NORTH_EAST) return;
    if (constraint == SwingConstants.SOUTH_WEST) return;
    if (constraint == SwingConstants.SOUTH_EAST) return;
    if (constraint == SwingConstants.CENTER) return;
    
    throw new IllegalArgumentException("Unsupported constraint: " + constraint); // NOI18N
}
 

private static String constraintName(int constraint) {
    if (constraint == SwingConstants.NORTH) return "NORTH"; // NOI18N
    if (constraint == SwingConstants.WEST) return "WEST"; // NOI18N
    if (constraint == SwingConstants.SOUTH) return "SOUTH"; // NOI18N
    if (constraint == SwingConstants.EAST) return "EAST"; // NOI18N
    if (constraint == SwingConstants.NORTH_WEST) return "NORTH_WEST"; // NOI18N
    if (constraint == SwingConstants.NORTH_EAST) return "NORTH_EAST"; // NOI18N
    if (constraint == SwingConstants.SOUTH_WEST) return "SOUTH_WEST"; // NOI18N
    if (constraint == SwingConstants.SOUTH_EAST) return "SOUTH_EAST"; // NOI18N
    if (constraint == SwingConstants.CENTER) return "CENTER"; // NOI18N

    return "UNSUPPORTED_CONSTRAINT (value=" + constraint + ")"; // NOI18N
}
 

protected void displayPopup() {
    JPopupMenu menu = new JPopupMenu();
    populatePopup(menu);
    if (menu.getComponentCount() > 0) {
        Dimension size = menu.getPreferredSize();
        size.width = Math.max(size.width, getWidth());
        menu.setPreferredSize(size);
        
        int align = getPopupAlign();
        
        int x;
        switch (align) {
            case SwingConstants.EAST:
            case SwingConstants.NORTH_EAST:
            case SwingConstants.SOUTH_EAST:
                x = getWidth() - size.width;
                break;
            default:
                x = 0;
                break;
        }
        
        int y;
        switch (align) {
            case SwingConstants.NORTH:
            case SwingConstants.NORTH_EAST:
            case SwingConstants.NORTH_WEST:
                y = -size.height;
                break;
            default:
                y = getHeight();
                break;
        }
        
        menu.show(this, x, y);
    }
}
 

/**
 * Updates cursor according to its location. For example, it sets
 * the appropriate resizing cursor when the mouse is over the boundary
 * of the selection component.
 *
 * @param cursorLocation current mouse cursor location.
 */
void updateCursor(Point cursorLocation) {
    Cursor cursor = Cursor.getDefaultCursor();
    if (cursorLocation == null) {
        resizingMode = 0;
    } else {
        int x = cursorLocation.x;
        int y = cursorLocation.y;
        Image resizeHandle = GridDesigner.RESIZE_HANDLE;
        int rw = resizeHandle.getWidth(null);
        int rh = resizeHandle.getHeight(null);
        for (Component selComp : selection) {
            Rectangle rect = fromComponentPane(selectionResizingBounds(selComp));
            boolean w = (rect.x-rw<=x) && (x<=rect.x+rect.width+rw);
            boolean h = (rect.y-rh<=y) && (y<=rect.y+rect.height+rh);
            boolean top = w && (rect.y-rh<=y) && (y<=rect.y+2);
            boolean bottom = w && (rect.y+rect.height-2<=y) && (y<=rect.y+rect.height+rh);
            boolean left = h && (rect.x-rw<=x) && (x<=rect.x+2);
            boolean right = h && (rect.x+rect.width-2<=x) && (x<=rect.x+rect.width+rw);
            if (top) {
                if (left) {
                    cursor = Cursor.getPredefinedCursor(Cursor.NW_RESIZE_CURSOR);
                    resizingMode = SwingConstants.NORTH_WEST;
                } else if (right) {
                    cursor = Cursor.getPredefinedCursor(Cursor.NE_RESIZE_CURSOR);
                    resizingMode = SwingConstants.NORTH_EAST;
                } else {
                    cursor = Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR);
                    resizingMode = SwingConstants.NORTH;
                }
            } else if (bottom) {
                if (left) {
                    cursor = Cursor.getPredefinedCursor(Cursor.SW_RESIZE_CURSOR);
                    resizingMode = SwingConstants.SOUTH_WEST;
                } else if (right) {
                    cursor = Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR);
                    resizingMode = SwingConstants.SOUTH_EAST;
                } else {
                    cursor = Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR);
                    resizingMode = SwingConstants.SOUTH;
                }
            } else if (left) {
                cursor = Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR);
                resizingMode = SwingConstants.WEST;
            } else if (right) {
                cursor = Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR);
                resizingMode = SwingConstants.EAST;
            } else {
                cursor = Cursor.getDefaultCursor();
                resizingMode = 0;
            }
            if (resizingMode != 0) {
                focusedComponent = selComp;
                break;
            }
        }
    }
    setCursor(cursor);
}
 

public void show() {
//        Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
//        if (focusOwner != null) focusRef = new WeakReference(focusOwner);
            
        owner = ownerRef == null ? null : ownerRef.get();
        ownerLocation = owner == null ? null : owner.getLocationOnScreen();
        
        window = new JWindow(owner);
        window.setType(Window.Type.POPUP);
        window.setAlwaysOnTop(false);
        window.setFocusable(true);
        window.setFocusableWindowState(true);
        window.setAutoRequestFocus(true);
        
        window.getContentPane().add(content);
        window.pack();
        
        if (popupAlign == -1) {
            window.setLocation(location.getLocation());
        } else {
            Dimension size = content.getSize();
            
            int x;
            switch (popupAlign) {
                case SwingConstants.EAST:
                case SwingConstants.NORTH_EAST:
                case SwingConstants.SOUTH_EAST:
                    x = location.x + location.width - size.width + 1;
                    break;
                default:
                    x = location.x + 1;
                    break;
            }
            
            int y;
            switch (popupAlign) {
                case SwingConstants.NORTH:
                case SwingConstants.NORTH_EAST:
                case SwingConstants.NORTH_WEST:
                    y = location.y - size.height + 1;
                    break;
                default:
                    y = location.y + location.height + 1;
                    break;
            }
            
            window.setLocation(x, y);
        }
        
        window.setVisible(true);
        
        Component defaultFocus = content.getFocusTraversalPolicy().getDefaultComponent(content);
        if (defaultFocus != null) defaultFocus.requestFocusInWindow();
        
        content.installListeners();
        
        if (listener != null) listener.popupShown();
    }
 

/**
 * Determines if we are moving east side of the component during resizing.
 *
 * @return {@code true} is we are moving east side of the component,
 * returns {@code false} otherwise.
 */
private boolean isResizingEastward() {
    return (resizingMode == SwingConstants.EAST
            || resizingMode == SwingConstants.SOUTH_EAST
            || resizingMode == SwingConstants.NORTH_EAST);
}
 

/**
 * Determines if we are moving north side of the component during resizing.
 *
 * @return {@code true} is we are moving north side of the component,
 * returns {@code false} otherwise.
 */
private boolean isResizingNorthward() {
    return (resizingMode == SwingConstants.NORTH
            || resizingMode == SwingConstants.NORTH_EAST
            || resizingMode == SwingConstants.NORTH_WEST);
}