+++ /dev/null
-package gnu.awt.xlib;
-
-/* Copyright (C) 2000 Free Software Foundation
-
- This file is part of libgcj.
-
-This software is copyrighted work licensed under the terms of the
-Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
-details. */
-
-import java.awt.*;
-
-import gnu.awt.LightweightRedirector;
-import gnu.gcj.xlib.Display;
-import gnu.gcj.xlib.XAnyEvent;
-import gnu.gcj.xlib.XExposeEvent;
-import gnu.gcj.xlib.XButtonEvent;
-import gnu.gcj.xlib.XConfigureEvent;
-import java.awt.event.PaintEvent;
-import java.awt.event.InputEvent;
-import java.awt.event.MouseEvent;
-import java.util.Vector;
-
-public class XEventLoop implements Runnable
-{
- Display display;
- EventQueue queue;
- XAnyEvent anyEvent;
- Thread eventLoopThread;
-
- LightweightRedirector lightweightRedirector = new LightweightRedirector();
-
- public XEventLoop(Display display, EventQueue queue)
- {
- this.display = display;
- this.queue = queue;
-
- anyEvent = new XAnyEvent(display);
- eventLoopThread = new Thread(this, "AWT thread for XEventLoop");
- eventLoopThread.start();
- }
-
- public void run()
- {
- while (true)
- postNextEvent();
- }
-
- void postNextEvent()
- {
- try
- {
- AWTEvent evt = getNextEvent();
- queue.postEvent(evt);
-
- }
- catch (InterruptedException ie)
- {
- // FIXME: what now?
- System.err.println(ie);
- }
- }
-
- /** get next event. Will block until events become available. */
-
- public AWTEvent getNextEvent()
- {
- // ASSERT:
- if (isIdle())
- throw new Error("should not be idle");
-
- AWTEvent event = null;
- while (event == null)
- {
- loadNextEvent();
- event = createEvent();
- }
-
- event = lightweightRedirector.redirect(event);
-
- return event;
- }
-
- void loadNextEvent()
- {
- try
- {
- setIdle(true);
-
- /* The code below will result in an XFlush(). However,
- while we are waiting for events after calling XFlush(),
- new X requests issued on other threads will not
- automatically be flushed. This can lead to a deadlock
- since XFlush() will not be called before after the
- processing of the next event, and new events arriving
- might be dependent on the delivery of the X
- requests.
-
- Code that issues X requests should therefore call
- flushIfIdle() after they're done, to ensure that the
- requests are delivered in a timely manner. XFlush is not
- run if event processing is underway, since we are assured
- that the event loop execution will return to this point,
- where requests are flushed again, before waiting for new
- events.
-
- Alternatively, do the work on the AWT thread, since the
- XEventQueue knows how to flush the display when it runs out
- of events. */
-
- //display.flush(); // implicit?
- anyEvent.loadNext();
- }
- catch (RuntimeException re)
- {
- System.err.println("Exception thrown on event thread:" + re);
- }
- finally
- {
- setIdle(false);
- }
- }
-
- /**
- * @returns an AWT event created based on the current XEvent.
- * Returns null if the current XEvent does not map to any perticular
- * AWT event.
- */
-
- AWTEvent createEvent()
- {
- /* avoid attempting to get client data before client data has
- been set. */
- Object peer;
- synchronized (this)
- {
- peer = anyEvent.getWindow().getClientData();
- }
-
- Component source = null;
-
- // Try to identify source component
-
- if (peer instanceof XCanvasPeer)
- {
- source = ((XCanvasPeer) peer).getComponent();
- }
-
- if (source == null)
- {
- String msg = "unable to locate source for event (" +
- anyEvent + ")";
- throw new RuntimeException(msg);
- }
-
- /* if a mapping from anyEvent to AWTEvent is possible, construct a
- new AWTEvent and return it. */
-
- int type = anyEvent.getType();
- switch (type)
- {
- case XAnyEvent.TYPE_EXPOSE:
- return createPaintEvent(source);
- case XAnyEvent.TYPE_BUTTON_PRESS:
- case XAnyEvent.TYPE_BUTTON_RELEASE:
- return createMouseEvent(type, source);
- case XAnyEvent.TYPE_UNMAP_NOTIFY:
- case XAnyEvent.TYPE_MAP_NOTIFY:
- case XAnyEvent.TYPE_REPARENT_NOTIFY:
- return null; // ignore for now
- case XAnyEvent.TYPE_CONFIGURE_NOTIFY:
- configureNotify(peer);
- return null;
-
- default:
- String msg = "Do no know how to handle event (" + anyEvent + ")";
- throw new RuntimeException(msg);
- }
- }
-
- AWTEvent createPaintEvent(Component src)
- {
- XExposeEvent expose = new XExposeEvent(anyEvent);
- PaintEvent pe = new PaintEvent(src, PaintEvent.PAINT,
- expose.getBounds());
- return pe;
- }
-
- AWTEvent createMouseEvent(int type, Component src)
- {
- XButtonEvent buttonEvt = new XButtonEvent(anyEvent);
-
- int modifiers = 0; //buttonToModifierMap[buttonEvt.button];
-
- /* Warning: this makes assumptions on the contents of
- X.h... Button1 = 1, Button2 = 2, etc... */
- switch (buttonEvt.button)
- {
- case 1:
- modifiers = InputEvent.BUTTON1_MASK;
- break;
- case 2:
- modifiers = InputEvent.BUTTON2_MASK;
- break;
- case 3:
- modifiers = InputEvent.BUTTON2_MASK;
- break;
- }
-
- int state = buttonEvt.state;
-
- // remap bits from state to modifiers:
-
- if ((state & XButtonEvent.MASK_SHIFT) != 0)
- modifiers |= InputEvent.SHIFT_MASK;
-
-
- if ((state & XButtonEvent.MASK_CONTROL) != 0)
- modifiers |= InputEvent.CTRL_MASK;
-
-
- /* FIXME: we need additional X code to properly map MODn states to
- input modifiers */
-
- int clickCount = 1; // FIXME... Can't get this from X.
- boolean popupTrigger = false; // FIXME: look up policy somewhere
-
- int x = buttonEvt.x;
- int y = buttonEvt.y;
-
- int id = (type == XAnyEvent.TYPE_BUTTON_PRESS) ?
- MouseEvent.MOUSE_PRESSED :
- MouseEvent.MOUSE_RELEASED;
-
- MouseEvent me = new MouseEvent(src,
- id,
- buttonEvt.time, modifiers,
- buttonEvt.x, buttonEvt.y,
- clickCount, popupTrigger);
- return me;
- }
-
- void configureNotify(Object peerObj)
- {
- XConfigureEvent configEvent = new XConfigureEvent(anyEvent);
- XFramePeer peer = (XFramePeer) peerObj;
-
- peer.configureNotify(configEvent);
- }
-
- public void flushIfIdle()
- {
- if (isIdle())
- display.flush();
- }
-
- volatile boolean idle = false;
-
- final synchronized void setIdle(boolean idle)
- {
- this.idle = idle;
- }
-
- final synchronized boolean isIdle()
- {
- return idle;
- }
-}
projects / msp430-gcc.git / blobdiff