1 files changed, 388 insertions, 0 deletions
diff --git a/libjava/gnu/awt/xlib/XCanvasPeer.java b/libjava/gnu/awt/xlib/XCanvasPeer.java
new file mode 100644
index 00000000000..5674f5bf2ad
--- /dev/null
+++ b/libjava/gnu/awt/xlib/XCanvasPeer.java
@@ -0,0 +1,388 @@
+/* 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.  */
+
+package gnu.awt.xlib;
+
+import java.awt.Dimension;
+import java.awt.Component;
+import java.awt.EventQueue;
+import java.awt.Rectangle;
+import java.awt.Color;
+import java.awt.Container;
+import java.awt.Image;
+import java.awt.GraphicsConfiguration;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.Toolkit;
+import java.awt.AWTEvent;
+import java.awt.Cursor;
+import java.awt.Shape;
+
+import java.awt.peer.*;
+import java.awt.image.*;
+
+import java.awt.event.MouseListener;
+import java.awt.event.PaintEvent;
+
+import java.util.EventListener;
+
+import gnu.gcj.xlib.WMSizeHints;
+import gnu.gcj.xlib.Window;
+import gnu.gcj.xlib.WindowAttributes;
+import gnu.gcj.xlib.Display;
+import gnu.gcj.xlib.Visual;
+import gnu.gcj.xlib.Screen;
+import gnu.gcj.xlib.XImage;
+
+import gnu.awt.j2d.*;
+
+public class XCanvasPeer implements CanvasPeer
+{
+  static final Dimension MIN_SIZE = new Dimension(1, 1);
+  
+  public // temporary
+  
+  Window window;
+  Window parent;
+
+  Component component;
+  XGraphicsConfiguration config;
+  
+  public XCanvasPeer(Component component)
+  {
+    this.component = component;
+    
+    // Set up graphics configuration (ie. screen + visual):
+
+    config = (XGraphicsConfiguration)
+      component.getGraphicsConfiguration();
+
+    if (config == null)
+      {
+	// This will usually only happen for toplevel windows
+	config = getXToolkit().getDefaultXGraphicsConfiguration();
+      } 
+
+    Rectangle bounds = component.getBounds();
+    parent = locateParentWindow(bounds);
+	
+    // Windows in X must atleast be of size 1x1
+    boolean boundsChanged = false;
+    if (bounds.width < 1)
+      {
+	boundsChanged = true;
+	bounds.width = 1;
+      }
+    if (bounds.height < 1)
+      {
+	boundsChanged = true;
+	bounds.height = 1;
+      }
+	
+    /* don't worry about this calling back to us, since the real
+       component object has not yet received a reference to this peer
+       object. */
+    component.setBounds(bounds);
+	    
+    WindowAttributes attributes = new WindowAttributes();
+
+    /* Set background color */
+    Color bg = component.getBackground();
+    if (bg != null)
+      {
+	int[] components =
+	{
+	  bg.getRed(),
+	  bg.getGreen(),
+	  bg.getBlue(),
+	  0xff
+	};
+
+	ColorModel cm = config.getColorModel();
+	long pixel = cm.getDataElement(components, 0);
+	attributes.setBackground(pixel);
+      }
+	
+    /* Set exposure mask so that we get exposure events
+       that can be translated into paint() calls. */
+    long eventMask = WindowAttributes.MASK_EXPOSURE;
+
+    /* It would be nice to set up all other required events here, but
+       it is not possible to do so before after all the children of
+       this component has been realized.  The reason is that it is not
+       determined whether a component is lightweight before after the
+       addNotify() method has been called.  Thus, it is not possible
+       for parent component to determine what events it needs to
+       furnish for lightweight children.  Instead, we currently rely
+       on the component calling our setEventMask() method after the
+       correct event mask has been determined. */
+
+    attributes.setEventMask(eventMask);
+	
+	    
+    // TODO: set more window attributes?
+
+    /* don't allow event queue to process events from the newly
+       created window before this peer has been registered as client
+       data. */
+    synchronized (getXToolkit().eventLoop)
+      {
+	window = new gnu.gcj.xlib.Window(parent, bounds, attributes);
+	window.setClientData(this); /* make it possible to find back
+				       to this peer object. Used by
+				       XEventQueue. */
+      }
+    
+    initWindowProperties();
+
+    if (component.isVisible())
+      EventQueue.invokeLater(new DoMap(window));
+  }
+
+  /**
+   * Override this in subclasses to implement other ways of obtaining
+   * parent windows.  Toplevel windows will typically have a different
+   * implementation.
+   */
+  gnu.gcj.xlib.Window locateParentWindow(Rectangle bounds)
+  {
+    Container parent = component.getParent();
+    while (parent.isLightweight())
+      {
+	bounds.x += parent.getX();
+	bounds.y += parent.getY();
+	parent = parent.getParent();
+	// a null pointer here is a genuine error
+      }
+    
+    XCanvasPeer parentPeer = (XCanvasPeer) parent.getPeer();
+    if (parentPeer == null)
+      throw new NullPointerException("Parent has no peer. This should " +
+				     "not be possible, since the " +
+				     "calls leading here should come " +
+				     "from parent, after it has " +
+				     "set the parent peer.");
+    return parentPeer.window;
+  }
+    
+
+  /** 
+   * Template method to allow subclasses to apply properties to X11
+   * window right after creation.
+   */
+  void initWindowProperties()
+  {
+  }
+    
+  XToolkit getXToolkit()
+  {
+    return XToolkit.INSTANCE;
+  }
+
+  protected void ensureFlush()
+  {
+    getXToolkit().flushIfIdle();
+  }
+
+  public Component getComponent()
+  {
+    return component;
+  }
+  
+  long getBasicEventMask()
+  {
+    return WindowAttributes.MASK_EXPOSURE;
+  }
+    
+  // -------- java.awt.peer.ComponentPeer implementation
+
+  public int checkImage(Image img, int width, int height, ImageObserver o)
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+  public Image createImage(ImageProducer prod)
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+  public Image createImage(int width, int height)
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+  public void dispose()
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public GraphicsConfiguration getGraphicsConfiguration()
+  {
+    return config;
+  }
+
+  public FontMetrics getFontMetrics(Font f)
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public Graphics getGraphics()
+  {
+    DirectRasterGraphics gfxDevice = new XGraphics(window, config);
+    IntegerGraphicsState igState = new IntegerGraphicsState(gfxDevice);
+    Graphics2DImpl gfx2d = new Graphics2DImpl(config);
+
+    gfx2d.setState(igState);
+    gfx2d.setColor(component.getBackground());
+    return gfx2d;
+  }
+    
+  public Point getLocationOnScreen()
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public Dimension getMinimumSize ()
+  {
+    return MIN_SIZE;
+  }
+
+  public Dimension getPreferredSize ()
+  {
+    return component.getSize();
+  }
+    
+  public Toolkit getToolkit()
+  {
+    return getXToolkit();
+  }
+
+  public void handleEvent(AWTEvent event)
+  {
+  }
+
+  public boolean isFocusTraversable()
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public void paint(Graphics gfx)
+  {
+    // do nothing by default
+  }
+    
+  public boolean prepareImage(Image img, int width, int height,
+			      ImageObserver o)
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public void print(Graphics graphics)
+  {
+    paint(graphics);
+  }
+
+  public void repaint(long tm, int x, int y, int w, int h)
+  {
+    /* TODO?
+
+       X allows intelligent X servers to do smart
+       refreshing. Perhaps involve X in repainting of components,
+       rather that keeping it all within the local event queue. */
+    
+    PaintEvent updateEvent = new PaintEvent(component,
+					    PaintEvent.UPDATE,
+					    new Rectangle(x, y, w, h));
+    getXToolkit().queue.postEvent(updateEvent);
+  }
+    
+  public void requestFocus()
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public void setBackground(Color color)
+  {
+    throw new UnsupportedOperationException("not implemented");
+  }
+
+  public void setBounds(int x, int y, int width, int height)
+  {
+    width  = Math.max(width,  1);
+    height = Math.max(height, 1);
+    window.setBounds(x, y, width, height);
+    ensureFlush();	    
+  }
+    
+  public void setCursor(Cursor cursor)
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public void setEnabled(boolean enabled)
+  {
+    throw new UnsupportedOperationException("FIXME, not implemented");
+  }
+
+  public void setEventMask(long eventMask)
+  {
+    WindowAttributes attributes = new WindowAttributes();
+
+    long xEventMask = getBasicEventMask();
+	
+    if ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0)
+      {
+	xEventMask |=
+	  WindowAttributes.MASK_BUTTON_PRESS |
+	  WindowAttributes.MASK_BUTTON_RELEASE;
+      }
+	    
+    attributes.setEventMask(xEventMask);
+    window.setAttributes(attributes);
+    ensureFlush();
+  }
+
+  public void setFont(Font font)
+  {
+    /* default canvas peer does keep track of font, since it won't
+       write anything. */
+  }
+
+  public void setForeground(Color color)
+  {
+    /* default canvas peer does keep track of foreground, since it won't
+       paint anything. */
+  }
+	
+  public void setVisible(boolean visible)
+  {
+    if (visible)
+      {
+	window.map();
+	ensureFlush();	    
+      }
+    else
+      {
+	throw new UnsupportedOperationException("unmap not implemented");
+      }
+  }
+	
+  static class DoMap implements Runnable 
+  {
+    Window window;
+    public DoMap(Window w) 
+    {
+      this.window = w;
+    }
+    
+    public void run() 
+    {
+      window.map();
+    }
+  }
+}
+