/* Copyright (C) 2000 Free Software Foundation
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/* Copyright (C) 2000 Free Software Foundation
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This file is part of libgcj.
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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details. */
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package gnu.awt.xlib;
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package gnu.awt.xlib;
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import gnu.gcj.xlib.Display;
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import gnu.gcj.xlib.Display;
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import java.awt.AWTEvent;
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import java.awt.AWTEvent;
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import java.awt.Component;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.Container;
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import java.awt.EventQueue;
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import java.awt.EventQueue;
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import java.awt.event.ComponentEvent;
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import java.awt.event.ComponentEvent;
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import java.awt.event.ContainerEvent;
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import java.awt.event.ContainerEvent;
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/**
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/**
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* The main difference here from a standard EventQueue is that the X
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* The main difference here from a standard EventQueue is that the X
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* display connection is flushed before waiting for more events.
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* display connection is flushed before waiting for more events.
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*/
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*/
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public class XEventQueue extends EventQueue
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public class XEventQueue extends EventQueue
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{
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{
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Display display;
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Display display;
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public XEventQueue(Display display)
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public XEventQueue(Display display)
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{
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{
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this.display = display;
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this.display = display;
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}
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}
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public AWTEvent getNextEvent() throws InterruptedException
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public AWTEvent getNextEvent() throws InterruptedException
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{
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{
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if ((peekEvent() == null) && (display != null))
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if ((peekEvent() == null) && (display != null))
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display.flush();
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display.flush();
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AWTEvent event = super.getNextEvent();
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AWTEvent event = super.getNextEvent();
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if (event != null)
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if (event != null)
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{
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{
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switch (event.getID ())
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switch (event.getID ())
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{
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{
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case ContainerEvent.COMPONENT_ADDED:
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case ContainerEvent.COMPONENT_ADDED:
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{
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{
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/* If a component has been added to a container, it needs to be
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/* If a component has been added to a container, it needs to be
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* invalidated, to ensure that it ultimately gets an addNotify.
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* invalidated, to ensure that it ultimately gets an addNotify.
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* If it's not invalidated, the component will never display in
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* If it's not invalidated, the component will never display in
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* an already-showing container (probably applies only to CardLayout).
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* an already-showing container (probably applies only to CardLayout).
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* Perhaps this code should be in java.awt, but the problem only seems
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* Perhaps this code should be in java.awt, but the problem only seems
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* to happen with xlib peers (not with gtk peers) so it's here instead.
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* to happen with xlib peers (not with gtk peers) so it's here instead.
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*/
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*/
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ContainerEvent ce = (ContainerEvent)event;
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ContainerEvent ce = (ContainerEvent)event;
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ce.getChild ().invalidate ();
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ce.getChild ().invalidate ();
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ce.getContainer ().validate ();
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ce.getContainer ().validate ();
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}
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}
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break;
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break;
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case ComponentEvent.COMPONENT_RESIZED:
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case ComponentEvent.COMPONENT_RESIZED:
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{
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{
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ComponentEvent ce = (ComponentEvent)event;
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ComponentEvent ce = (ComponentEvent)event;
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// FIXME: there may be opportunities to coalesce resize events
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// FIXME: there may be opportunities to coalesce resize events
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ce.getComponent ().validate ();
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ce.getComponent ().validate ();
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}
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}
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break;
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break;
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case ComponentEvent.COMPONENT_SHOWN:
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case ComponentEvent.COMPONENT_SHOWN:
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{
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{
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ComponentEvent ce = (ComponentEvent)event;
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ComponentEvent ce = (ComponentEvent)event;
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Component comp = ce.getComponent ();
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Component comp = ce.getComponent ();
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if (!comp.isValid ())
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if (!comp.isValid ())
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{
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{
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/* Try to validate, going up the tree to the highest-level invalid
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/* Try to validate, going up the tree to the highest-level invalid
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* Container. The idea is to ensure that addNotify gets called for
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* Container. The idea is to ensure that addNotify gets called for
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* any non-top-level component being shown, to make it create a peer.
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* any non-top-level component being shown, to make it create a peer.
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*/
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*/
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Container parent = comp.getParent ();
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Container parent = comp.getParent ();
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while (parent != null)
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while (parent != null)
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{
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{
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Container next = parent.getParent ();
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Container next = parent.getParent ();
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if (next == null || next.isValid ())
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if (next == null || next.isValid ())
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{
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{
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parent.validate ();
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parent.validate ();
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break;
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break;
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}
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}
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else
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else
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parent = next;
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parent = next;
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}
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}
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if (comp instanceof Container)
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if (comp instanceof Container)
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comp.validate ();
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comp.validate ();
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}
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}
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comp.repaint ();
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comp.repaint ();
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}
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}
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break;
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break;
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default:
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default:
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break;
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break;
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}
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}
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}
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}
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return event;
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return event;
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}
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}
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}
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}
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