basicinternalframeui.java

来自「JAVA的一些源码 JAVA2 STANDARD EDITION DEVELO」· Java 代码 · 共 1,620 行 · 第 1/4 页

        // InternalFrameListener
        public void internalFrameClosed(InternalFrameEvent e) {
            frame.removeInternalFrameListener(getHandler());
        }

        public void internalFrameActivated(InternalFrameEvent e) {
            if (!isKeyBindingRegistered()){
                setKeyBindingRegistered(true);
                setupMenuOpenKey();
                setupMenuCloseKey();
            }
            if (isKeyBindingRegistered())
                setKeyBindingActive(true);
        }

        public void internalFrameDeactivated(InternalFrameEvent e) {
            setKeyBindingActive(false);
        }

        public void internalFrameClosing(InternalFrameEvent e) { }
        public void internalFrameOpened(InternalFrameEvent e) { }
        public void internalFrameIconified(InternalFrameEvent e) { }
        public void internalFrameDeiconified(InternalFrameEvent e) { }


        // LayoutManager
        public void addLayoutComponent(String name, Component c) {}
        public void removeLayoutComponent(Component c) {}    
        public Dimension preferredLayoutSize(Container c)  {
            Dimension result;
            Insets i = frame.getInsets();
        
            result = new Dimension(frame.getRootPane().getPreferredSize());
            result.width += i.left + i.right;
            result.height += i.top + i.bottom;

            if(getNorthPane() != null) {
                Dimension d = getNorthPane().getPreferredSize();
                result.width = Math.max(d.width, result.width);
                result.height += d.height;
            }

            if(getSouthPane() != null) {
                Dimension d = getSouthPane().getPreferredSize();
                result.width = Math.max(d.width, result.width);
                result.height += d.height;
            }

            if(getEastPane() != null) {
                Dimension d = getEastPane().getPreferredSize();
                result.width += d.width;
                result.height = Math.max(d.height, result.height);
            }

            if(getWestPane() != null) {
                Dimension d = getWestPane().getPreferredSize();
                result.width += d.width;
                result.height = Math.max(d.height, result.height);
            }
            return result;
        }
    
        public Dimension minimumLayoutSize(Container c) {
            // The minimum size of the internal frame only takes into
            // account the title pane since you are allowed to resize
            // the frames to the point where just the title pane is visible.
            Dimension result = new Dimension();
            if (getNorthPane() != null &&
                getNorthPane() instanceof BasicInternalFrameTitlePane) {
                  result = new Dimension(getNorthPane().getMinimumSize());
            }
            Insets i = frame.getInsets();
            result.width += i.left + i.right;
            result.height += i.top + i.bottom;
        
            return result;
        }
    
        public void layoutContainer(Container c) {
            Insets i = frame.getInsets();
            int cx, cy, cw, ch;
            
            cx = i.left;
            cy = i.top;
            cw = frame.getWidth() - i.left - i.right;
            ch = frame.getHeight() - i.top - i.bottom;
            
            if(getNorthPane() != null) {
                Dimension size = getNorthPane().getPreferredSize();
                if (DefaultLookup.getBoolean(frame, BasicInternalFrameUI.this,
                          "InternalFrame.layoutTitlePaneAtOrigin", false)) {
                    cy = 0;
		    ch += i.top;
                    getNorthPane().setBounds(0, 0, frame.getWidth(),
                                             size.height);
                }
                else {
                    getNorthPane().setBounds(cx, cy, cw, size.height);
                }
                cy += size.height;
                ch -= size.height;
            }
    
            if(getSouthPane() != null) {
                Dimension size = getSouthPane().getPreferredSize();
                getSouthPane().setBounds(cx, frame.getHeight() 
                                                    - i.bottom - size.height, 
                                                    cw, size.height);
                ch -= size.height;
            }
    
            if(getWestPane() != null) {
                Dimension size = getWestPane().getPreferredSize();
                getWestPane().setBounds(cx, cy, size.width, ch);
                cw -= size.width;
                cx += size.width;           
            }
    
            if(getEastPane() != null) {
                Dimension size = getEastPane().getPreferredSize();
                getEastPane().setBounds(cw - size.width, cy, size.width, ch);
                cw -= size.width;           
            }
            
            if(frame.getRootPane() != null) {
                frame.getRootPane().setBounds(cx, cy, cw, ch);
            }
        }


        // MouseInputListener
        private Component mouseEventTarget = null;
        private Component dragSource = null;

        public void mousePressed(MouseEvent e) {
            // what is going on here is the GlassPane is up on the inactive
            // internalframe and want's to "catch" the first mousePressed on
            // the frame in order to give it to the BorderLister (and not the
            // underlying component) and let it activate the frame
            if (borderListener != null){
                borderListener.mousePressed(e);
            } 
            forwardMouseEvent(e);
        }

        /** 
         * Forward the mouseEntered event to the underlying child container.
         * @see #mousePressed
         */
        public void mouseEntered(MouseEvent e) {
            forwardMouseEvent(e);
        }

        /** 
         * Forward the mouseMoved event to the underlying child container.
         * @see #mousePressed
         */

        public void mouseMoved(MouseEvent e) {
            forwardMouseEvent(e);
        }

        /** 
         * Forward the mouseExited event to the underlying child container.
         * @see #mousePressed
         */
        public void mouseExited(MouseEvent e) {
            forwardMouseEvent(e);
        }

        /** 
         * Ignore mouseClicked events.
         * @see #mousePressed
         */

        public void mouseClicked(MouseEvent e) { }
        /** 
         * Forward the mouseReleased event to the underlying child container.
         * @see #mousePressed
         */
        public void mouseReleased(MouseEvent e) {
            forwardMouseEvent(e);
        }

        /** 
         * Forward the mouseDragged event to the underlying child container.
         * @see #mousePressed
         */
        public void mouseDragged(MouseEvent e) {
            forwardMouseEvent(e);
        }

        /**
         * Forward a mouse event to the current mouse target, setting it
         * if necessary.
         */
        private void forwardMouseEvent(MouseEvent e) {
            // We only want to do this for the selected internal frame.
            Component target =
                findComponentAt(frame.getRootPane().getLayeredPane(), 
                    e.getX(), e.getY());

            // Search hierarchy for target with mouse listeners.
            while ((target != null)                                &&
                   ((target.getMouseListeners().length == 0)       &&
                    (target.getMouseMotionListeners().length == 0) &&
                    (target.getMouseWheelListeners().length == 0))) {
                target = target.getParent();
            }
            if (target == null) {
                // No target found with mouse listeners.
                return;
            }

            int id = e.getID();
            switch(id) {
                case MouseEvent.MOUSE_ENTERED:
                    if (isDragging && !frame.isSelected()) {
                        return;
                    }
                    if (target != mouseEventTarget) {
                        mouseEventTarget = target;
                    }
                    retargetMouseEvent(id, e, mouseEventTarget);
                    break;
                case MouseEvent.MOUSE_PRESSED:
                    if (target != mouseEventTarget) {
                        mouseEventTarget = target;
                    }
                    retargetMouseEvent(id, e, mouseEventTarget);
                    // Set the drag source in case we start dragging.
                    dragSource = target;
                    break;
                case MouseEvent.MOUSE_EXITED:
                    if (isDragging && !frame.isSelected()) {
                        return;
                    }
                    retargetMouseEvent(id, e, mouseEventTarget);
                    break;
                case MouseEvent.MOUSE_CLICKED:
                    retargetMouseEvent(id, e, mouseEventTarget);
                    break;
                case MouseEvent.MOUSE_MOVED:
                    if (target != mouseEventTarget) {
                        retargetMouseEvent(MouseEvent.MOUSE_EXITED, e,
                                mouseEventTarget);
                        mouseEventTarget = target;
                        retargetMouseEvent(MouseEvent.MOUSE_ENTERED, e,
                                mouseEventTarget);
                    }
                    retargetMouseEvent(id, e, mouseEventTarget);
                    break;
                case MouseEvent.MOUSE_DRAGGED:
                    if (!isDragging) {
                        isDragging = true;
                    }
                    retargetMouseEvent(id, e, dragSource);
                    break;
                case MouseEvent.MOUSE_RELEASED:
                    if (isDragging) {
                        retargetMouseEvent(id, e, dragSource);
                        isDragging = false;
                    } else {
                        retargetMouseEvent(id, e, mouseEventTarget);
                    }
                    break;
                case MouseEvent.MOUSE_WHEEL:
                    retargetMouseEvent(id, e, mouseEventTarget);
                    break;
            }
        }

    /**
     * Find the lightweight child component which corresponds to the
     * specified location.  This is similar to the new 1.2 API in
     * Container, but we need to run on 1.1.  The other changes are
     * due to Container.findComponentAt's use of package-private data.
     */
      private Component findComponentAt(Container c, int x, int y) {
        if (!c.contains(x, y)) {
	  return c;
        }
        int ncomponents = c.getComponentCount();
        Component component[] = c.getComponents();
        for (int i = 0 ; i < ncomponents ; i++) {
	  Component comp = component[i];
	  Point loc = comp.getLocation();
	  if ((comp != null) && (comp.contains(x - loc.x, y - loc.y)) &&
	      (comp.getPeer() instanceof LightweightPeer) &&
	      (comp.isVisible() == true)) {
	    // found a component that intersects the point, see if there
	    // is a deeper possibility.
	    if (comp instanceof Container) {
	      Container child = (Container) comp;
	      Point childLoc = child.getLocation();
	      Component deeper = findComponentAt(child,
						 x - childLoc.x, y - childLoc.y);
	      if (deeper != null) {
		return deeper;
	      }
	    } else {
	      return comp;
	    }
	  }
        }
        return c;
      }

        /**
         * Dispatch an event clone, retargeted for the specified target.
         */
        private void retargetMouseEvent(int id, MouseEvent e,
                Component target) {
            if (target == null) {
                return;
            }
            // fix for bug #4202966 -- hania
            // When retargetting a mouse event, we need to translate
            // the event's coordinates relative to the target.

            Point p = SwingUtilities.convertPoint(frame.getLayeredPane(),
                                                e.getX(), e.getY(),
                                                target);
            MouseEvent retargeted = new MouseEvent(target, 
                id,
                e.getWhen(),
                e.getModifiers() | e.getModifiersEx(),
                p.x,
                p.y,
                e.getClickCount(),
                e.isPopupTrigger());
            target.dispatchEvent(retargeted);
        }


        // PropertyChangeListener
        public void propertyChange(PropertyChangeEvent evt) {
            String prop = (String)evt.getPropertyName();
            JInternalFrame f = (JInternalFrame)evt.getSource();
            Object newValue = evt.getNewValue();
            Object oldValue = evt.getOldValue();

            if (JInternalFrame.IS_CLOSED_PROPERTY == prop) {
                if (newValue == Boolean.TRUE) {
                    cancelResize();
                    if ((frame.getParent() != null) && componentListenerAdded) {
                        frame.getParent().removeComponentListener(
                                componentListener);
                    }
                    closeFrame(f);
                }
            } else if (JInternalFrame.IS_MAXIMUM_PROPERTY == prop) {
                if(newValue == Boolean.TRUE) {
                    maximizeFrame(f);
                } else {
                    minimizeFrame(f);
                }
            } else if(JInternalFrame.IS_ICON_PROPERTY == prop) {
                if (newValue == Boolean.TRUE) {
                    iconifyFrame(f);
                } else {
                    deiconifyFrame(f);
                }
            } else if (JInternalFrame.IS_SELECTED_PROPERTY == prop) {
                Component glassPane = f.getGlassPane();
                if (newValue == Boolean.TRUE && oldValue == Boolean.FALSE) {
                    activateFrame(f);
                    glassPane.setVisible(false);
                } else if (newValue == Boolean.FALSE &&
                           oldValue == Boolean.TRUE) {
                    deactivateFrame(f);
                    glassPane.setVisible(true);
                }
            } else if (prop == "ancestor") {
                if (newValue == null) {
                    cancelResize();
                }
                if (frame.getParent() != null) {
                    parentBounds = f.getParent().getBounds();
                } else {
                    parentBounds = null;
                }
                if ((frame.getParent() != null) && !componentListenerAdded) {
                    f.getParent().addComponentListener(componentListener);
                    componentListenerAdded = true;
                } else if ((newValue == null) && componentListenerAdded) {
                    if (f.getParent() != null) {
                        f.getParent().removeComponentListener(
                                componentListener);
                    }
                    componentListenerAdded = false;
                }
            } else if (JInternalFrame.TITLE_PROPERTY == prop ||
                    prop == "closable" || prop == "iconable" ||
                    prop == "maximizable") {
                Dimension dim = frame.getMinimumSize();
                Dimension frame_dim = frame.getSize();
                if (dim.width > frame_dim.width) {
                    frame.setSize(dim.width, frame_dim.height);
                }
            }
        }
    }
}