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Diffstat (limited to 'gnu/java/awt/peer/x/XEventPump.java')
-rw-r--r-- | gnu/java/awt/peer/x/XEventPump.java | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/gnu/java/awt/peer/x/XEventPump.java b/gnu/java/awt/peer/x/XEventPump.java new file mode 100644 index 000000000..bd1ef08ce --- /dev/null +++ b/gnu/java/awt/peer/x/XEventPump.java @@ -0,0 +1,287 @@ +/* XEventPump.java -- Pumps events from X to AWT + 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.x; + +import java.awt.Graphics; +import java.awt.Rectangle; +import java.awt.Toolkit; +import java.awt.Window; +import java.awt.event.ComponentEvent; +import java.awt.event.KeyEvent; +import java.awt.event.MouseEvent; +import java.awt.event.PaintEvent; +import java.util.HashMap; + +import gnu.x11.Display; +import gnu.x11.event.ButtonPress; +import gnu.x11.event.ButtonRelease; +import gnu.x11.event.ConfigureNotify; +import gnu.x11.event.Event; +import gnu.x11.event.Expose; +import gnu.x11.event.Input; +import gnu.x11.event.KeyPress; +import gnu.x11.event.KeyRelease; +import gnu.x11.event.MotionNotify; + +/** + * Fetches events from X, translates them to AWT events and pumps them up + * into the AWT event queue. + * + * @author Roman Kennke (kennke@aicas.com) + */ +public class XEventPump + implements Runnable +{ + + /** + * The X Display from which we fetch and pump up events. + */ + private Display display; + + /** + * Maps X Windows to AWT Windows to be able to correctly determine the + * event targets. + */ + private HashMap windows; + + /** + * Indicates if we are currently inside a drag operation. This is + * set to the button ID when a button is pressed and to -1 (indicating + * that no drag is active) when the mouse is released. + */ + private int drag; + + /** + * Creates a new XEventPump for the specified X Display. + * + * @param d the X Display + */ + XEventPump(Display d) + { + display = d; + windows = new HashMap(); + drag = -1; + Thread t = new Thread(this); + t.start(); + } + + /** + * The main event pump loop. This basically fetches events from the + * X Display and pumps them into the system event queue. + */ + public void run() + { + while (display.connected) + { + try + { + Event xEvent = display.next_event(); + handleEvent(xEvent); + } + catch (ThreadDeath death) + { + // If someone wants to kill us, let them. + return; + } + catch (Throwable x) + { + System.err.println("Exception during event dispatch:"); + x.printStackTrace(System.err); + } + } + } + + /** + * Adds an X Window to AWT Window mapping. This is required so that the + * event pump can correctly determine the event targets. + * + * @param xWindow the X Window + * @param awtWindow the AWT Window + */ + void registerWindow(gnu.x11.Window xWindow, Window awtWindow) + { + if (XToolkit.DEBUG) + System.err.println("registering window id: " + xWindow.id); + windows.put(new Integer(xWindow.id), awtWindow); + } + + void unregisterWindow(gnu.x11.Window xWindow) + { + windows.remove(new Integer(xWindow.id)); + } + + private void handleEvent(Event xEvent) + { + Integer key = new Integer(xEvent.window_id());; + Window awtWindow = (Window) windows.get(key); + + if (XToolkit.DEBUG) + System.err.println("fetched event: " + xEvent); + switch (xEvent.code()) + { + case ButtonPress.CODE: + ButtonPress bp = (ButtonPress) xEvent; + // Create and post the mouse event. + int button = bp.detail(); + drag = button; + MouseEvent mp = new MouseEvent(awtWindow, MouseEvent.MOUSE_PRESSED, + System.currentTimeMillis(), 0, + bp.event_x(), bp.event_y(), + 1, false, button); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mp); + break; + case ButtonRelease.CODE: + ButtonRelease br = (ButtonRelease) xEvent; + drag = -1; + MouseEvent mr = new MouseEvent(awtWindow, MouseEvent.MOUSE_RELEASED, + System.currentTimeMillis(), 0, + br.event_x(), br.event_y(), + 1, false, br.detail()); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mr); + break; + case MotionNotify.CODE: + MotionNotify mn = (MotionNotify) xEvent; + MouseEvent mm; + if (drag == -1) + { + mm = new MouseEvent(awtWindow, MouseEvent.MOUSE_MOVED, + System.currentTimeMillis(), 0, + mn.event_x(), mn.event_y(), + 1, false); + } + else + { + mm = new MouseEvent(awtWindow, MouseEvent.MOUSE_DRAGGED, + System.currentTimeMillis(), 0, + mn.event_x(), mn.event_y(), + 1, false); + } + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mm); + break; + case ConfigureNotify.CODE: + ConfigureNotify c = (ConfigureNotify) xEvent; + if (XToolkit.DEBUG) + System.err.println("resize request for window id: " + key); + + // Detect and report size changes. + if (c.width() != awtWindow.getWidth() + || c.height() != awtWindow.getHeight()) + { + if (XToolkit.DEBUG) + System.err.println("Setting size on AWT window: " + c.width() + + ", " + c.height() + ", " + awtWindow.getWidth() + + ", " + awtWindow.getHeight()); + ((XFramePeer) awtWindow.getPeer()).callback = true; + awtWindow.setSize(c.width(), c.height()); + ((XFramePeer) awtWindow.getPeer()).callback = false; + } + break; + case Expose.CODE: + Expose exp = (Expose) xEvent; + if (XToolkit.DEBUG) + System.err.println("expose request for window id: " + key); + Rectangle r = new Rectangle(exp.x(), exp.y(), exp.width(), + exp.height()); + //System.err.println("expose paint: " + r); + // We need to clear the background of the exposed rectangle. + Graphics g = awtWindow.getGraphics(); + g.clearRect(r.x, r.y, r.width, r.height); + g.dispose(); + PaintEvent pev = new PaintEvent(awtWindow, PaintEvent.PAINT, r); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(pev); + break; + case KeyPress.CODE: + case KeyRelease.CODE: + handleKeyEvent(xEvent, awtWindow); + break; + default: + if (XToolkit.DEBUG) + System.err.println("Unhandled X event: " + xEvent); + } + } + + /** + * Handles key events from X. + * + * @param xEvent the X event + * @param awtWindow the AWT window to which the event gets posted + */ + private void handleKeyEvent(Event xEvent, Window awtWindow) + { + Input keyEvent = (Input) xEvent; + int xKeyCode = keyEvent.detail(); + int xMods = keyEvent.state(); + int keyCode = KeyboardMapping.mapToKeyCode(xEvent.display.input, xKeyCode, + xMods); + char keyChar = KeyboardMapping.mapToKeyChar(xEvent.display.input, xKeyCode, + xMods); + if (XToolkit.DEBUG) + System.err.println("XEventPump.handleKeyEvent: " + xKeyCode + ", " + + xMods + ": " + ((int) keyChar) + ", " + keyCode); + int awtMods = KeyboardMapping.mapModifiers(xMods); + long when = System.currentTimeMillis(); + KeyEvent ke; + if (keyEvent.code() == KeyPress.CODE) + { + ke = new KeyEvent(awtWindow, KeyEvent.KEY_PRESSED, when, + awtMods, keyCode, + KeyEvent.CHAR_UNDEFINED); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(ke); + if (keyChar != KeyEvent.CHAR_UNDEFINED) + { + ke = new KeyEvent(awtWindow, KeyEvent.KEY_TYPED, when, + awtMods, KeyEvent.VK_UNDEFINED, + keyChar); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(ke); + } + + } + else + { + ke = new KeyEvent(awtWindow, KeyEvent.KEY_RELEASED, when, + awtMods, keyCode, + KeyEvent.CHAR_UNDEFINED); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(ke); + } + + } + + +} + |