Initial revision

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102074 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 651 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/java/awt/peer/gtk/GtkComponentPeer.java b/libjava/classpath/gnu/java/awt/peer/gtk/GtkComponentPeer.java
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+/* GtkComponentPeer.java -- Implements ComponentPeer with GTK
+   Copyright (C) 1998, 1999, 2002, 2004, 2005  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.gtk;
+
+import java.awt.AWTEvent;
+import java.awt.AWTException;
+import java.awt.BufferCapabilities;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Cursor;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.Image;
+import java.awt.Insets;
+import java.awt.ItemSelectable;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.FocusEvent;
+import java.awt.event.ItemEvent;
+import java.awt.event.KeyEvent;
+import java.awt.event.MouseEvent;
+import java.awt.event.PaintEvent;
+import java.awt.event.TextEvent;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+import java.awt.image.VolatileImage;
+import java.awt.peer.ComponentPeer;
+
+public class GtkComponentPeer extends GtkGenericPeer
+  implements ComponentPeer
+{
+  VolatileImage backBuffer;
+  BufferCapabilities caps;
+
+  Component awtComponent;
+
+  Insets insets;
+
+  boolean isInRepaint;
+
+  /* this isEnabled differs from Component.isEnabled, in that it
+     knows if a parent is disabled.  In that case Component.isEnabled 
+     may return true, but our isEnabled will always return false */
+  native boolean isEnabled ();
+  static native boolean modalHasGrab();
+
+  native int[] gtkWidgetGetForeground ();
+  native int[] gtkWidgetGetBackground ();
+  native void gtkWidgetGetDimensions (int[] dim);
+  native void gtkWidgetGetPreferredDimensions (int[] dim);
+  native void gtkWidgetGetLocationOnScreen (int[] point);
+  native void gtkWidgetSetCursor (int type);
+  native void gtkWidgetSetBackground (int red, int green, int blue);
+  native void gtkWidgetSetForeground (int red, int green, int blue);
+  native void gtkWidgetSetSensitive (boolean sensitive);
+  native void gtkWidgetSetParent (ComponentPeer parent);
+  native void gtkWidgetRequestFocus ();
+  native void gtkWidgetDispatchKeyEvent (int id, long when, int mods,
+                                         int keyCode, int keyLocation);
+
+  native boolean isRealized ();
+
+  void realize ()
+  {
+    // Default implementation does nothing
+  }
+
+  native void setNativeEventMask ();
+
+  void create ()
+  {
+    throw new RuntimeException ();
+  }
+
+  native void connectSignals ();
+
+  protected GtkComponentPeer (Component awtComponent)
+  {
+    super (awtComponent);
+    this.awtComponent = awtComponent;
+    insets = new Insets (0, 0, 0, 0);
+
+    create ();
+
+    connectSignals ();
+
+    if (awtComponent.getForeground () != null)
+      setForeground (awtComponent.getForeground ());
+    if (awtComponent.getBackground () != null)
+      setBackground (awtComponent.getBackground ());
+    if (awtComponent.getFont() != null)
+      setFont(awtComponent.getFont());
+
+    Component parent = awtComponent.getParent ();
+
+    // Only set our parent on the GTK side if our parent on the AWT
+    // side is not showing.  Otherwise the gtk peer will be shown
+    // before we've had a chance to position and size it properly.
+    if (awtComponent instanceof Window
+        || (parent != null && ! parent.isShowing ()))
+      setParentAndBounds ();
+
+    setNativeEventMask ();
+
+    realize ();
+  }
+
+  void setParentAndBounds ()
+  {
+    setParent ();
+
+    setComponentBounds ();
+
+    setVisibleAndEnabled ();
+  }
+
+  void setParent ()
+  {
+    ComponentPeer p;
+    Component component = awtComponent;
+    do
+      {
+        component = component.getParent ();
+        p = component.getPeer ();
+      }
+    while (p instanceof java.awt.peer.LightweightPeer);
+
+    if (p != null)
+      gtkWidgetSetParent (p);
+  }
+
+  void beginNativeRepaint ()
+  {
+    isInRepaint = true;
+  }
+
+  void endNativeRepaint ()
+  {
+    isInRepaint = false;
+  }
+
+  /*
+   * Set the bounds of this peer's AWT Component based on dimensions
+   * returned by the native windowing system.  Most Components impose
+   * their dimensions on the peers which is what the default
+   * implementation does.  However some peers, like GtkFileDialogPeer,
+   * need to pass their size back to the AWT Component.
+   */
+  void setComponentBounds ()
+  {
+    Rectangle bounds = awtComponent.getBounds ();
+
+    if (bounds.x == 0 && bounds.y == 0
+        && bounds.width == 0 && bounds.height == 0)
+      return;
+
+    setBounds (bounds.x, bounds.y, bounds.width, bounds.height);
+  }
+
+  void setVisibleAndEnabled ()
+  {
+    setVisible (awtComponent.isVisible ());
+    setEnabled (awtComponent.isEnabled ());
+  }
+
+  public int checkImage (Image image, int width, int height, 
+			 ImageObserver observer) 
+  {
+    return getToolkit().checkImage(image, width, height, observer);
+  }
+
+  public Image createImage (ImageProducer producer) 
+  {
+    return new GtkImage (producer);
+  }
+
+  public Image createImage (int width, int height)
+  {
+    Image image;
+    if (GtkToolkit.useGraphics2D ())
+      image = new BufferedImage (width, height, BufferedImage.TYPE_INT_RGB);
+    else
+      image = new GtkImage (width, height);
+
+    Graphics g = image.getGraphics();
+    g.setColor(getBackground());
+    g.fillRect(0, 0, width, height);
+    return image;
+  }
+
+  public void disable () 
+  {
+    setEnabled (false);
+  }
+
+  public void enable () 
+  {
+    setEnabled (true);
+  }
+
+  public ColorModel getColorModel () 
+  {
+    return ColorModel.getRGBdefault ();
+  }
+
+  public FontMetrics getFontMetrics (Font font)
+  {
+    return getToolkit().getFontMetrics(font);
+  }
+
+  public Graphics getGraphics ()
+  {
+    if (GtkToolkit.useGraphics2D ())
+        return new GdkGraphics2D (this);
+    else
+        return new GdkGraphics (this);
+  }
+
+  public Point getLocationOnScreen () 
+  { 
+    int point[] = new int[2];
+    gtkWidgetGetLocationOnScreen (point);
+    return new Point (point[0], point[1]);
+  }
+
+  public Dimension getMinimumSize () 
+  {
+    return minimumSize ();
+  }
+
+  public Dimension getPreferredSize ()
+  {
+    return preferredSize ();
+  }
+
+  public Toolkit getToolkit ()
+  {
+    return Toolkit.getDefaultToolkit();
+  }
+  
+  public void handleEvent (AWTEvent event)
+  {
+    int id = event.getID();
+    KeyEvent ke = null;
+
+    switch (id)
+      {
+      case PaintEvent.PAINT:
+      case PaintEvent.UPDATE:
+        {
+          try 
+            {
+              Graphics g = getGraphics ();
+          
+              // Some peers like GtkFileDialogPeer are repainted by Gtk itself
+              if (g == null)
+                break;
+
+              g.setClip (((PaintEvent) event).getUpdateRect());
+
+              if (id == PaintEvent.PAINT)
+                awtComponent.paint (g);
+              else
+                awtComponent.update (g);
+
+              g.dispose ();
+            }
+          catch (InternalError e)
+            {
+              System.err.println (e);
+            }
+        }
+        break;
+      case KeyEvent.KEY_PRESSED:
+        ke = (KeyEvent) event;
+        gtkWidgetDispatchKeyEvent (ke.getID (), ke.getWhen (), ke.getModifiersEx (),
+                                   ke.getKeyCode (), ke.getKeyLocation ());
+        break;
+      case KeyEvent.KEY_RELEASED:
+        ke = (KeyEvent) event;
+        gtkWidgetDispatchKeyEvent (ke.getID (), ke.getWhen (), ke.getModifiersEx (),
+                                   ke.getKeyCode (), ke.getKeyLocation ());
+        break;
+      }
+  }
+  
+  public boolean isFocusTraversable () 
+  {
+    return true;
+  }
+
+  public Dimension minimumSize () 
+  {
+    int dim[] = new int[2];
+
+    gtkWidgetGetPreferredDimensions (dim);
+
+    return new Dimension (dim[0], dim[1]);
+  }
+
+  public void paint (Graphics g)
+  {
+  }
+
+  public Dimension preferredSize ()
+  {
+    int dim[] = new int[2];
+
+    gtkWidgetGetPreferredDimensions (dim);
+
+    return new Dimension (dim[0], dim[1]);
+  }
+
+  public boolean prepareImage (Image image, int width, int height,
+			       ImageObserver observer) 
+  {
+    return getToolkit().prepareImage(image, width, height, observer);
+  }
+
+  public void print (Graphics g) 
+  {
+    throw new RuntimeException ();
+  }
+
+  public void repaint (long tm, int x, int y, int width, int height)
+  {
+    if (x == 0 && y == 0 && width == 0 && height == 0)
+      return;
+
+    q().postEvent (new PaintEvent (awtComponent, PaintEvent.UPDATE,
+                                 new Rectangle (x, y, width, height)));
+  }
+
+  public void requestFocus ()
+  {
+    gtkWidgetRequestFocus();
+    postFocusEvent(FocusEvent.FOCUS_GAINED, false);
+  }
+
+  public void reshape (int x, int y, int width, int height) 
+  {
+    setBounds (x, y, width, height);
+  }
+
+  public void setBackground (Color c) 
+  {
+    gtkWidgetSetBackground (c.getRed(), c.getGreen(), c.getBlue());
+  }
+
+  native void setNativeBounds (int x, int y, int width, int height);
+
+  public void setBounds (int x, int y, int width, int height)
+  {
+    Component parent = awtComponent.getParent ();
+
+    // Heavyweight components that are children of one or more
+    // lightweight containers have to be handled specially.  Because
+    // calls to GLightweightPeer.setBounds do nothing, GTK has no
+    // knowledge of the lightweight containers' positions.  So we have
+    // to add the offsets manually when placing a heavyweight
+    // component within a lightweight container.  The lightweight
+    // container may itself be in a lightweight container and so on,
+    // so we need to continue adding offsets until we reach a
+    // container whose position GTK knows -- that is, the first
+    // non-lightweight.
+    boolean lightweightChild = false;
+    Insets i;
+    while (parent.isLightweight ())
+      {
+	lightweightChild = true;
+
+	i = ((Container) parent).getInsets ();
+
+	x += parent.getX () + i.left;
+	y += parent.getY () + i.top;
+
+	parent = parent.getParent ();
+      }
+
+    // We only need to convert from Java to GTK coordinates if we're
+    // placing a heavyweight component in a Window.
+    if (parent instanceof Window && !lightweightChild)
+      {
+	Insets insets = ((Window) parent).getInsets ();
+        GtkWindowPeer peer = (GtkWindowPeer) parent.getPeer ();
+        int menuBarHeight = 0;
+        if (peer instanceof GtkFramePeer)
+          menuBarHeight = ((GtkFramePeer) peer).getMenuBarHeight ();
+
+        // Convert from Java coordinates to GTK coordinates.
+        setNativeBounds (x - insets.left, y - insets.top + menuBarHeight,
+                         width, height);
+      }
+    else
+      setNativeBounds (x, y, width, height);
+  }
+
+  void setCursor ()
+  {
+    setCursor (awtComponent.getCursor ());
+  }
+
+  public void setCursor (Cursor cursor) 
+  {
+    gtkWidgetSetCursor (cursor.getType ());
+  }
+
+  public void setEnabled (boolean b)
+  {
+    gtkWidgetSetSensitive (b);
+  }
+
+  public void setFont (Font f)
+  {
+    // FIXME: This should really affect the widget tree below me.
+    // Currently this is only handled if the call is made directly on
+    // a text widget, which implements setFont() itself.
+    gtkWidgetModifyFont(f.getName(), f.getStyle(), f.getSize());
+  }
+
+  public void setForeground (Color c) 
+  {
+    gtkWidgetSetForeground (c.getRed(), c.getGreen(), c.getBlue());
+  }
+
+  public Color getForeground ()
+  {
+    int rgb[] = gtkWidgetGetForeground ();
+    return new Color (rgb[0], rgb[1], rgb[2]);
+  }
+
+  public Color getBackground ()
+  {
+    int rgb[] = gtkWidgetGetBackground ();
+    return new Color (rgb[0], rgb[1], rgb[2]);
+  }
+
+  public void setVisible (boolean b)
+  {
+    if (b)
+      show ();
+    else
+      hide ();
+  }
+
+  public native void hide ();
+  public native void show ();
+
+  protected void postMouseEvent(int id, long when, int mods, int x, int y, 
+				int clickCount, boolean popupTrigger) 
+  {
+    q().postEvent(new MouseEvent(awtComponent, id, when, mods, x, y, 
+			       clickCount, popupTrigger));
+  }
+
+  protected void postExposeEvent (int x, int y, int width, int height)
+  {
+    if (!isInRepaint)
+      q().postEvent (new PaintEvent (awtComponent, PaintEvent.PAINT,
+                                   new Rectangle (x, y, width, height)));
+  }
+
+  protected void postKeyEvent (int id, long when, int mods,
+                               int keyCode, char keyChar, int keyLocation)
+  {
+    KeyEvent keyEvent = new KeyEvent (awtComponent, id, when, mods,
+                                      keyCode, keyChar, keyLocation);
+
+    // Also post a KEY_TYPED event if keyEvent is a key press that
+    // doesn't represent an action or modifier key.
+    if (keyEvent.getID () == KeyEvent.KEY_PRESSED
+        && (!keyEvent.isActionKey ()
+            && keyCode != KeyEvent.VK_SHIFT
+            && keyCode != KeyEvent.VK_CONTROL
+            && keyCode != KeyEvent.VK_ALT))
+      {
+        synchronized (q)
+          {
+            q().postEvent (keyEvent);
+            q().postEvent (new KeyEvent (awtComponent, KeyEvent.KEY_TYPED, when, mods,
+                                        KeyEvent.VK_UNDEFINED, keyChar, keyLocation));
+          }
+      }
+    else
+      q().postEvent (keyEvent);
+  }
+
+  protected void postFocusEvent (int id, boolean temporary)
+  {
+    q().postEvent (new FocusEvent (awtComponent, id, temporary));
+  }
+
+  protected void postItemEvent (Object item, int stateChange)
+  {
+    q().postEvent (new ItemEvent ((ItemSelectable)awtComponent, 
+				ItemEvent.ITEM_STATE_CHANGED,
+				item, stateChange));
+  }
+
+  protected void postTextEvent ()
+  {
+    q().postEvent (new TextEvent (awtComponent, TextEvent.TEXT_VALUE_CHANGED));
+  }
+
+  public GraphicsConfiguration getGraphicsConfiguration ()
+  {
+    // FIXME: just a stub for now.
+    return null;
+  }
+
+  public void setEventMask (long mask)
+  {
+    // FIXME: just a stub for now.
+  }
+
+  public boolean isFocusable ()
+  {
+    return false;
+  }
+
+  public boolean requestFocus (Component source, boolean b1, 
+                               boolean b2, long x)
+  {
+    return false;
+  }
+
+  public boolean isObscured ()
+  {
+    return false;
+  }
+
+  public boolean canDetermineObscurity ()
+  {
+    return false;
+  }
+
+  public void coalescePaintEvent (PaintEvent e)
+  {
+    
+  }
+
+  public void updateCursorImmediately ()
+  {
+    
+  }
+
+  public boolean handlesWheelScrolling ()
+  {
+    return false;
+  }
+
+  // Convenience method to create a new volatile image on the screen
+  // on which this component is displayed.
+  public VolatileImage createVolatileImage (int width, int height)
+  {
+    return new GtkVolatileImage (width, height);
+  }
+
+  // Creates buffers used in a buffering strategy.
+  public void createBuffers (int numBuffers, BufferCapabilities caps)
+    throws AWTException
+  {
+    // numBuffers == 2 implies double-buffering, meaning one back
+    // buffer and one front buffer.
+    if (numBuffers == 2)
+      backBuffer = new GtkVolatileImage(awtComponent.getWidth(),
+					awtComponent.getHeight(),
+					caps.getBackBufferCapabilities());
+    else
+      throw new AWTException("GtkComponentPeer.createBuffers:"
+			     + " multi-buffering not supported");
+    this.caps = caps;
+  }
+
+  // Return the back buffer.
+  public Image getBackBuffer ()
+  {
+    return backBuffer;
+  }
+
+  // FIXME: flip should be implemented as a fast native operation
+  public void flip (BufferCapabilities.FlipContents contents)
+  {
+    getGraphics().drawImage(backBuffer,
+			    awtComponent.getWidth(),
+			    awtComponent.getHeight(),
+			    null);
+
+    // create new back buffer and clear it to the background color.
+    if (contents == BufferCapabilities.FlipContents.BACKGROUND)
+	{
+	  backBuffer = createVolatileImage(awtComponent.getWidth(),
+					   awtComponent.getHeight());
+	  backBuffer.getGraphics().clearRect(0, 0,
+					     awtComponent.getWidth(),
+					     awtComponent.getHeight());
+	}
+    // FIXME: support BufferCapabilities.FlipContents.PRIOR
+  }
+
+  // Release the resources allocated to back buffers.
+  public void destroyBuffers ()
+  {
+    backBuffer.flush();
+  }
+}