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1: /* SwingFramePeer.java -- An abstract Swing based peer for AWT frames 2: Copyright (C) 2006 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: package gnu.java.awt.peer.swing; 39: 40: import java.awt.Frame; 41: import java.awt.Graphics; 42: import java.awt.Insets; 43: import java.awt.MenuBar; 44: import java.awt.Point; 45: import java.awt.event.MouseEvent; 46: import java.awt.peer.FramePeer; 47: 48: /** 49: * An abstract base class for FramePeer implementations based on Swing. 50: * This class provides the ability to display and handle AWT MenuBars that 51: * are based on Swing. 52: * 53: * As a minimum, a subclass must implement all the remaining abstract methods 54: * as well as the following methods: 55: * <ul> 56: * <li>{@link java.awt.peer.ComponentPeer#getLocationOnScreen()}</li> 57: * <li>{@link java.awt.peer.ComponentPeer#getGraphics()}</li> 58: * <li>{@link java.awt.peer.ComponentPeer#createImage(int, int)}</li> 59: * </ul> 60: * 61: * @author Roman Kennke (kennke@aicas.com) 62: */ 63: public abstract class SwingFramePeer 64: extends SwingWindowPeer 65: implements FramePeer 66: { 67: /** 68: * The menu bar to display. 69: */ 70: SwingMenuBarPeer menuBar = null; 71: 72: /** 73: * Creates a new SwingFramePeer. 74: * 75: * @param frame the frame 76: */ 77: public SwingFramePeer(Frame frame) 78: { 79: super(frame); 80: } 81: 82: /** 83: * Sets the menu bar to display in this frame. 84: * 85: * @param mb the menu bar to set 86: */ 87: public void setMenuBar(MenuBar mb) 88: { 89: menuBar = (SwingMenuBarPeer) mb.getPeer(); 90: menuBar.setFramePeer(this); 91: menuBar.setWidth(awtComponent.getWidth()); 92: } 93: 94: /** 95: * Triggers 'heavyweight' painting of the frame. This will paint a menu bar 96: * if present as well as the child components of this frame. 97: * 98: * @param g the graphics context to use for painting 99: */ 100: protected void peerPaint(Graphics g) 101: { 102: super.peerPaint(g); 103: if (menuBar != null) 104: menuBar.peerPaint(g); 105: } 106: 107: /** 108: * Sets the size and location of this frame. This resizes the menubar to fit 109: * within the frame. 110: * 111: * @param x the X coordinate of the screen location 112: * @param y the Y coordinate of the screen location 113: * @param w the width of the frame 114: * @param h the height of the frame 115: */ 116: public void setBounds(int x, int y, int w, int h) 117: { 118: super.setBounds(x, y, w, h); 119: if (menuBar != null) 120: menuBar.setWidth(w); 121: } 122: 123: /** 124: * Calculates the insets of this frame peer. This fetches the insets 125: * from the superclass and adds the insets of the menubar if one is present. 126: * 127: * @return the insets of the frame 128: */ 129: public Insets getInsets() 130: { 131: Insets insets = super.getInsets(); 132: if (menuBar != null) 133: insets.top += menuBar.getHeight(); 134: return insets; 135: } 136: 137: /** 138: * Returns the location of the menu on the screen. This is needed internally 139: * by the {@link SwingMenuBarPeer} in order to determine its screen location. 140: * 141: * @return the location of the menu on the screen 142: */ 143: public Point getMenuLocationOnScreen() 144: { 145: Insets i = super.getInsets(); 146: return new Point(i.top, i.left); 147: } 148: 149: /** 150: * Overridden to provide the ability to handle menus. 151: * 152: * @param ev the mouse event 153: */ 154: protected void handleMouseEvent(MouseEvent ev) 155: { 156: Point p = ev.getPoint(); 157: Insets i = super.getInsets(); 158: if (menuBar != null) 159: { 160: int menuHeight = menuBar.getHeight(); 161: if (p.y >= i.top && p.y <= i.top + menuHeight) 162: menuBar.handleMouseEvent(ev); 163: else 164: { 165: ev.translatePoint(0, -menuHeight); 166: super.handleMouseMotionEvent(ev); 167: } 168: } 169: 170: super.handleMouseEvent(ev); 171: } 172: 173: /** 174: * Overridden to provide the ability to handle menus. 175: * 176: * @param ev the mouse event 177: */ 178: protected void handleMouseMotionEvent(MouseEvent ev) 179: { 180: Point p = ev.getPoint(); 181: Insets i = super.getInsets(); 182: if (menuBar != null) 183: { 184: int menuHeight = menuBar.getHeight(); 185: if (p.y >= i.top && p.y <= i.top + menuHeight) 186: menuBar.handleMouseMotionEvent(ev); 187: else 188: { 189: ev.translatePoint(0, -menuHeight); 190: super.handleMouseMotionEvent(ev); 191: } 192: } 193: 194: super.handleMouseMotionEvent(ev); 195: } 196: }