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Diffstat (limited to 'gnu/java/awt/peer/swing/SwingFramePeer.java')
| -rw-r--r-- | gnu/java/awt/peer/swing/SwingFramePeer.java | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/gnu/java/awt/peer/swing/SwingFramePeer.java b/gnu/java/awt/peer/swing/SwingFramePeer.java new file mode 100644 index 000000000..fea1b504a --- /dev/null +++ b/gnu/java/awt/peer/swing/SwingFramePeer.java @@ -0,0 +1,196 @@ +/* SwingFramePeer.java -- An abstract Swing based peer for AWT frames + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.peer.swing; + +import java.awt.Frame; +import java.awt.Graphics; +import java.awt.Insets; +import java.awt.MenuBar; +import java.awt.Point; +import java.awt.event.MouseEvent; +import java.awt.peer.FramePeer; + +/** + * An abstract base class for FramePeer implementations based on Swing. + * This class provides the ability to display and handle AWT MenuBars that + * are based on Swing. + * + * As a minimum, a subclass must implement all the remaining abstract methods + * as well as the following methods: + * <ul> + * <li>{@link ComponentPeer#getLocationOnScreen()}</li> + * <li>{@link ComponentPeer#getGraphics()}</li> + * <li>{@link ComponentPeer#createImage(int, int)}</li> + * </ul> + * + * @author Roman Kennke (kennke@aicas.com) + */ +public abstract class SwingFramePeer + extends SwingWindowPeer + implements FramePeer +{ + /** + * The menu bar to display. + */ + SwingMenuBarPeer menuBar = null; + + /** + * Creates a new SwingFramePeer. + * + * @param frame the frame + */ + public SwingFramePeer(Frame frame) + { + super(frame); + } + + /** + * Sets the menu bar to display in this frame. + * + * @param mb the menu bar to set + */ + public void setMenuBar(MenuBar mb) + { + menuBar = (SwingMenuBarPeer) mb.getPeer(); + menuBar.setFramePeer(this); + menuBar.setWidth(awtComponent.getWidth()); + } + + /** + * Triggers 'heavyweight' painting of the frame. This will paint a menu bar + * if present as well as the child components of this frame. + * + * @param g the graphics context to use for painting + */ + protected void peerPaint(Graphics g) + { + super.peerPaint(g); + if (menuBar != null) + menuBar.peerPaint(g); + } + + /** + * Sets the size and location of this frame. This resizes the menubar to fit + * within the frame. + * + * @param x the X coordinate of the screen location + * @param y the Y coordinate of the screen location + * @param w the width of the frame + * @param h the height of the frame + */ + public void setBounds(int x, int y, int w, int h) + { + super.setBounds(x, y, w, h); + if (menuBar != null) + menuBar.setWidth(w); + } + + /** + * Calculates the insets of this frame peer. This fetches the insets + * from the superclass and adds the insets of the menubar if one is present. + * + * @return the insets of the frame + */ + public Insets getInsets() + { + Insets insets = super.getInsets(); + if (menuBar != null) + insets.top += menuBar.getHeight(); + return insets; + } + + /** + * Returns the location of the menu on the screen. This is needed internally + * by the {@link SwingMenuBarPeer} in order to determine its screen location. + * + * @return the location of the menu on the screen + */ + public Point getMenuLocationOnScreen() + { + Insets i = super.getInsets(); + return new Point(i.top, i.left); + } + + /** + * Overridden to provide the ability to handle menus. + * + * @param ev the mouse event + */ + protected void handleMouseEvent(MouseEvent ev) + { + Point p = ev.getPoint(); + Insets i = super.getInsets(); + if (menuBar != null) + { + int menuHeight = menuBar.getHeight(); + if (p.y >= i.top && p.y <= i.top + menuHeight) + menuBar.handleMouseEvent(ev); + else + { + ev.translatePoint(0, -menuHeight); + super.handleMouseMotionEvent(ev); + } + } + + super.handleMouseEvent(ev); + } + + /** + * Overridden to provide the ability to handle menus. + * + * @param ev the mouse event + */ + protected void handleMouseMotionEvent(MouseEvent ev) + { + Point p = ev.getPoint(); + Insets i = super.getInsets(); + if (menuBar != null) + { + int menuHeight = menuBar.getHeight(); + if (p.y >= i.top && p.y <= i.top + menuHeight) + menuBar.handleMouseMotionEvent(ev); + else + { + ev.translatePoint(0, -menuHeight); + super.handleMouseMotionEvent(ev); + } + } + + super.handleMouseMotionEvent(ev); + } +} |