smoothgradientrootpaneui.java

eq跨平台查询工具源码 eq跨平台查询工具源码

    };

    /**
     * MouseInputHandler is responsible for handling resize/moving of
     * the Window. It sets the cursor directly on the Window when then
     * mouse moves over a hot spot.
     */
    private class MouseInputHandler implements MouseInputListener {
        /**
         * Set to true if the drag operation is moving the window.
         */
        private boolean isMovingWindow;

        /**
         * Used to determine the corner the resize is occuring from.
         */
        private int dragCursor;

        /**
         * X location the mouse went down on for a drag operation.
         */
        private int dragOffsetX;

        /**
         * Y location the mouse went down on for a drag operation.
         */
        private int dragOffsetY;

        /**
         * Width of the window when the drag started.
         */
        private int dragWidth;

        /**
         * Height of the window when the drag started.
         */
        private int dragHeight;


        public void mousePressed(MouseEvent ev) {
            JRootPane rootPane = getRootPane();

            if (rootPane.getWindowDecorationStyle() == JRootPane.NONE) {
                return;
            }
            Point dragWindowOffset = ev.getPoint();
            Window w = (Window)ev.getSource();
            if (w != null) {
                w.toFront();
            }
            Point convertedDragWindowOffset = SwingUtilities.convertPoint(
                           w, dragWindowOffset, getTitlePane());

            Frame f = null;
            Dialog d = null;

            if (w instanceof Frame) {
                f = (Frame)w;
            } else if (w instanceof Dialog) {
                d = (Dialog)w;
            }

            int frameState = (f != null) ? f.getExtendedState() : 0;

            if (getTitlePane() != null &&
                        getTitlePane().contains(convertedDragWindowOffset)) {
                if ((f != null && ((frameState & Frame.MAXIMIZED_BOTH) == 0)
                        || (d != null))
                        && dragWindowOffset.y >= BORDER_DRAG_THICKNESS
                        && dragWindowOffset.x >= BORDER_DRAG_THICKNESS
                        && dragWindowOffset.x < w.getWidth()
                            - BORDER_DRAG_THICKNESS) {
                    isMovingWindow = true;
                    dragOffsetX = dragWindowOffset.x;
                    dragOffsetY = dragWindowOffset.y;
                }
            }
            else if (f != null && f.isResizable()
                    && ((frameState & Frame.MAXIMIZED_BOTH) == 0)
                    || (d != null && d.isResizable())) {
                dragOffsetX = dragWindowOffset.x;
                dragOffsetY = dragWindowOffset.y;
                dragWidth = w.getWidth();
                dragHeight = w.getHeight();
                dragCursor = getCursor(calculateCorner(
                             w, dragWindowOffset.x, dragWindowOffset.y));
            }
        }

        public void mouseReleased(MouseEvent ev) {
            if (dragCursor != 0 && window != null && !window.isValid()) {
                // Some Window systems validate as you resize, others won't,
                // thus the check for validity before repainting.
                window.validate();
                getRootPane().repaint();
            }
            isMovingWindow = false;
            dragCursor = 0;
        }

        public void mouseMoved(MouseEvent ev) {
            JRootPane root = getRootPane();

            if (root.getWindowDecorationStyle() == JRootPane.NONE) {
                return;
            }

            Window w = (Window)ev.getSource();

            Frame f = null;
            Dialog d = null;

            if (w instanceof Frame) {
                f = (Frame)w;
            } else if (w instanceof Dialog) {
                d = (Dialog)w;
            }

            // Update the cursor
            int cursor = getCursor(calculateCorner(w, ev.getX(), ev.getY()));

            if (cursor != 0 && ((f != null && (f.isResizable() &&
                    (f.getExtendedState() & Frame.MAXIMIZED_BOTH) == 0))
                    || (d != null && d.isResizable()))) {
                w.setCursor(Cursor.getPredefinedCursor(cursor));
            }
            else {
                w.setCursor(lastCursor);
            }
        }

        private void adjust(Rectangle bounds, Dimension min, int deltaX,
                            int deltaY, int deltaWidth, int deltaHeight) {
            bounds.x += deltaX;
            bounds.y += deltaY;
            bounds.width += deltaWidth;
            bounds.height += deltaHeight;
            if (min != null) {
                if (bounds.width < min.width) {
                    int correction = min.width - bounds.width;
                    if (deltaX != 0) {
                        bounds.x -= correction;
                    }
                    bounds.width = min.width;
                }
                if (bounds.height < min.height) {
                    int correction = min.height - bounds.height;
                    if (deltaY != 0) {
                        bounds.y -= correction;
                    }
                    bounds.height = min.height;
                }
            }
        }

        public void mouseDragged(MouseEvent ev) {
            Window w = (Window)ev.getSource();
            Point pt = ev.getPoint();

            if (isMovingWindow) {
                Point windowPt = w.getLocationOnScreen();

                windowPt.x += pt.x - dragOffsetX;
                windowPt.y += pt.y - dragOffsetY;
                w.setLocation(windowPt);
            }
            else if (dragCursor != 0) {
                Rectangle r = w.getBounds();
                Rectangle startBounds = new Rectangle(r);
                Dimension min = w.getMinimumSize();

                switch (dragCursor) {
                case Cursor.E_RESIZE_CURSOR:
                    adjust(r, min, 0, 0, pt.x + (dragWidth - dragOffsetX) -
                           r.width, 0);
                    break;
                case Cursor.S_RESIZE_CURSOR:
                    adjust(r, min, 0, 0, 0, pt.y + (dragHeight - dragOffsetY) -
                           r.height);
                    break;
                case Cursor.N_RESIZE_CURSOR:
                    adjust(r, min, 0, pt.y -dragOffsetY, 0,
                           -(pt.y - dragOffsetY));
                    break;
                case Cursor.W_RESIZE_CURSOR:
                    adjust(r, min, pt.x - dragOffsetX, 0,
                           -(pt.x - dragOffsetX), 0);
                    break;
                case Cursor.NE_RESIZE_CURSOR:
                    adjust(r, min, 0, pt.y - dragOffsetY,
                           pt.x + (dragWidth - dragOffsetX) - r.width,
                           -(pt.y - dragOffsetY));
                    break;
                case Cursor.SE_RESIZE_CURSOR:
                    adjust(r, min, 0, 0, 
                           pt.x + (dragWidth - dragOffsetX) - r.width,
                           pt.y + (dragHeight - dragOffsetY) -
                           r.height);
                    break;
                case Cursor.NW_RESIZE_CURSOR:
                    adjust(r, min, pt.x - dragOffsetX,
                           pt.y - dragOffsetY,
                           -(pt.x - dragOffsetX),
                           -(pt.y - dragOffsetY));
                    break;
                case Cursor.SW_RESIZE_CURSOR:
                    adjust(r, min, pt.x - dragOffsetX, 0,
                           -(pt.x - dragOffsetX),
                           pt.y + (dragHeight - dragOffsetY) - r.height);
                    break;
                default:
                    break;
                }
                if (!r.equals(startBounds)) {
                    w.setBounds(r);
                    // Defer repaint/validate on mouseReleased unless dynamic
                    // layout is active.
                    if (Toolkit.getDefaultToolkit().isDynamicLayoutActive()) {
                        w.validate();
                        getRootPane().repaint();
                    }
                }
            }
        }

        public void mouseEntered(MouseEvent ev) {
            Window w = (Window)ev.getSource();
            lastCursor = w.getCursor();
            mouseMoved(ev);
        }

        public void mouseExited(MouseEvent ev) {
            Window w = (Window)ev.getSource();
            w.setCursor(lastCursor);
        }

        public void mouseClicked(MouseEvent ev) {
            Window w = (Window)ev.getSource();
            Frame f = null;

            if (w instanceof Frame) {
                f = (Frame)w;
            } else {
                return;
            }

            Point convertedPoint = SwingUtilities.convertPoint(
                           w, ev.getPoint(), getTitlePane());

            int state = f.getExtendedState();
            if (getTitlePane() != null &&
                    getTitlePane().contains(convertedPoint)) {
                if ((ev.getClickCount() % 2) == 0 &&
                        ((ev.getModifiers() & InputEvent.BUTTON1_MASK) != 0)) {
                    if (f.isResizable()) {
                        if ((state & Frame.MAXIMIZED_BOTH) != 0) {
                            f.setExtendedState(state & ~Frame.MAXIMIZED_BOTH);
                        }
                        else {
                            f.setExtendedState(state | Frame.MAXIMIZED_BOTH);
                        }
                        return;
                    }
                }
            }
        }

        /**
         * Returns the corner that contains the point <code>x</code>,
         * <code>y</code>, or -1 if the position doesn't match a corner.
         */
        private int calculateCorner(Component c, int x, int y) {
            int xPosition = calculatePosition(x, c.getWidth());
            int yPosition = calculatePosition(y, c.getHeight());

            if (xPosition == -1 || yPosition == -1) {
                return -1;
            }
            return yPosition * 5 + xPosition;
        }

        /**
         * Returns the Cursor to render for the specified corner. This returns
         * 0 if the corner doesn't map to a valid Cursor
         */
        private int getCursor(int corner) {
            if (corner == -1) {
                return 0;
            }
            return cursorMapping[corner];
        }

        /**
         * Returns an integer indicating the position of <code>spot</code>
         * in <code>width</code>. The return value will be:
         * 0 if < BORDER_DRAG_THICKNESS
         * 1 if < CORNER_DRAG_WIDTH
         * 2 if >= CORNER_DRAG_WIDTH && < width - BORDER_DRAG_THICKNESS
         * 3 if >= width - CORNER_DRAG_WIDTH
         * 4 if >= width - BORDER_DRAG_THICKNESS
         * 5 otherwise
         */
        private int calculatePosition(int spot, int width) {
            if (spot < BORDER_DRAG_THICKNESS) {
                return 0;
            }
            if (spot < CORNER_DRAG_WIDTH) {
                return 1;
            }
            if (spot >= (width - BORDER_DRAG_THICKNESS)) {
                return 4;
            }
            if (spot >= (width - CORNER_DRAG_WIDTH)) {
                return 3;
            }
            return 2;
        }
    }
}