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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/awt/peer/GLightweightPeer.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/awt/peer/GLightweightPeer.java')
-rw-r--r-- | libjava/classpath/gnu/java/awt/peer/GLightweightPeer.java | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/peer/GLightweightPeer.java b/libjava/classpath/gnu/java/awt/peer/GLightweightPeer.java new file mode 100644 index 000000000..fe128c26c --- /dev/null +++ b/libjava/classpath/gnu/java/awt/peer/GLightweightPeer.java @@ -0,0 +1,461 @@ +/* GLightweightPeer.java -- + Copyright (C) 2003, 2004, 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; + +import java.awt.AWTEvent; +import java.awt.AWTException; +import java.awt.BufferCapabilities; +import java.awt.Color; +import java.awt.Component; +import java.awt.Cursor; +import java.awt.Dimension; +import java.awt.Font; +import java.awt.FontMetrics; +import java.awt.Graphics; +import java.awt.GraphicsConfiguration; +import java.awt.Image; +import java.awt.Insets; +import java.awt.Point; +import java.awt.Rectangle; +import java.awt.Toolkit; +import java.awt.event.PaintEvent; +import java.awt.image.ColorModel; +import java.awt.image.ImageObserver; +import java.awt.image.ImageProducer; +import java.awt.image.VolatileImage; +import java.awt.peer.ContainerPeer; +import java.awt.peer.LightweightPeer; + +/** + * A stub class that implements the ComponentPeer and ContainerPeer + * interfaces using callbacks into the Component and Container + * classes. GLightweightPeer allows the Component and Container + * classes to treat lightweight and heavyweight peers in the same way. + * + * Lightweight components are painted directly onto their parent + * containers through an Image object provided by the toolkit. + */ +public class GLightweightPeer + implements LightweightPeer, ContainerPeer +{ + public GLightweightPeer() + { + // Nothing to do here. + } + + // -------- java.awt.peer.ContainerPeer implementation: + + public Insets insets() + { + // Nothing to do here for lightweights. + return null; + } + + public Insets getInsets() + { + // Nothing to do here for lightweights. + return null; + } + + public void beginValidate() + { + // Nothing to do here for lightweights. + } + + public void endValidate() + { + // Nothing to do here for lightweights. + } + + public void beginLayout() + { + // Nothing to do here for lightweights. + } + + public void endLayout() + { + // Nothing to do here for lightweights. + } + + public boolean isPaintPending() + { + // Nothing to do here for lightweights. + return false; + } + + // -------- java.awt.peer.ComponentPeer implementation: + + public int checkImage(Image img, int width, int height, ImageObserver o) + { + // Nothing to do here for lightweights. + return -1; + } + + public Image createImage(ImageProducer prod) + { + // Nothing to do here for lightweights. + return null; + } + + /* This method is not called. */ + public Image createImage(int width, int height) + { + // Nothing to do here for lightweights. + return null; + } + + public void disable() + { + // Nothing to do here for lightweights. + } + + public void dispose() + { + // Nothing to do here for lightweights. + } + + public void enable() + { + // Nothing to do here for lightweights. + } + + public GraphicsConfiguration getGraphicsConfiguration() + { + // Nothing to do here for lightweights. + return null; + } + + public FontMetrics getFontMetrics(Font f) + { + // We shouldn't end up here, but if we do we can still try do something + // reasonable. + Toolkit tk = Toolkit.getDefaultToolkit(); + return tk.getFontMetrics(f); + } + + /* Returning null here tells the Component object that called us to + * use its parent's Graphics. */ + public Graphics getGraphics() + { + // Nothing to do here for lightweights. + return null; + } + + public Point getLocationOnScreen() + { + // Nothing to do here for lightweights. + return null; + } + + public Dimension getMinimumSize() + { + return minimumSize(); + } + + public Dimension getPreferredSize() + { + return preferredSize(); + } + + /* Returning null here tells the Component object that called us to + * use its parent's Toolkit. */ + public Toolkit getToolkit() + { + // Nothing to do here for lightweights. + return null; + } + + public void handleEvent(AWTEvent e) + { + // This can only happen when an application posts a PaintEvent for + // a lightweight component directly. We still support painting for + // this case. + if (e instanceof PaintEvent) + { + PaintEvent pe = (PaintEvent) e; + Component target = (Component) e.getSource(); + if (target != null && target.isShowing()) + { + Graphics g = target.getGraphics(); + if (g != null) + { + try + { + Rectangle clip = pe.getUpdateRect(); + g.setClip(clip); + target.paint(g); + } + finally + { + g.dispose(); + } + } + } + } + } + + public void hide() + { + // Nothing to do here for lightweights. + } + + public boolean isFocusable() + { + // Nothing to do here for lightweights. + return false; + } + + public boolean isFocusTraversable() + { + // Nothing to do here for lightweights. + return false; + } + + public Dimension minimumSize() + { + return new Dimension(0, 0); + } + + public Dimension preferredSize() + { + return new Dimension(0, 0); + } + + public void paint(Graphics graphics) + { + // Nothing to do here for lightweights. + } + + public boolean prepareImage(Image img, int width, int height, + ImageObserver o) + { + // Nothing to do here for lightweights. + return false; + } + + public void print(Graphics graphics) + { + // Nothing to do here for lightweights. + } + + public void repaint(long tm, int x, int y, int width, int height) + { + // Nothing to do here for lightweights. + } + + public void requestFocus() + { + // Nothing to do here for lightweights. + } + + public boolean requestFocus(Component source, boolean bool1, boolean bool2, + long x) + { + // Nothing to do here for lightweights. + return false; + } + + public void reshape(int x, int y, int width, int height) + { + // Nothing to do here for lightweights. + } + + public void setBackground(Color color) + { + // Nothing to do here for lightweights. + } + + public void setBounds(int x, int y, int width, int height) + { + // Nothing to do here for lightweights. + } + + /** + * Sets the cursor on the heavy-weight parent peer. + * Called by the MouseListener on mouse enter. + */ + public void setCursor(Cursor cursor) + { + // Nothing to do here for lightweights. + } + + public void setEnabled(boolean enabled) + { + // Nothing to do here for lightweights. + } + + public void setEventMask(long eventMask) + { + // Nothing to do here for lightweights. + } + + public void setFont(Font font) + { + // Nothing to do here for lightweights. + } + + public void setForeground(Color color) + { + // Nothing to do here for lightweights. + } + + public void setVisible(boolean visible) + { + // Nothing to do here for lightweights. + } + + public void show() + { + // Nothing to do here for lightweights. + } + + public ColorModel getColorModel() + { + // Nothing to do here for lightweights. + return null; + } + + public boolean isObscured() + { + // Nothing to do here for lightweights. + return false; + } + + public boolean canDetermineObscurity() + { + // Nothing to do here for lightweights. + return false; + } + + public void coalescePaintEvent(PaintEvent e) + { + // Nothing to do here for lightweights. + } + + public void updateCursorImmediately() + { + // Nothing to do here for lightweights. + } + + public VolatileImage createVolatileImage(int width, int height) + { + // Nothing to do here for lightweights. + return null; + } + + public boolean handlesWheelScrolling() + { + // Nothing to do here for lightweights. + return false; + } + + public void createBuffers(int x, BufferCapabilities capabilities) + throws AWTException + { + // Nothing to do here for lightweights. + } + + public Image getBackBuffer() + { + // Nothing to do here for lightweights. + return null; + } + + public void flip(BufferCapabilities.FlipContents contents) + { + // Nothing to do here for lightweights. + } + + public void destroyBuffers() + { + // Nothing to do here for lightweights. + } + + public boolean isRestackSupported() + { + // Nothing to do here for lightweights. + return false; + } + + public void cancelPendingPaint(int x, int y, int width, int height) + { + // Nothing to do here for lightweights. + } + + public void restack() + { + // Nothing to do here for lightweights. + } + + public Rectangle getBounds() + { + // Nothing to do here for lightweights. + return null; + } + + public void reparent(ContainerPeer parent) + { + // Nothing to do here for lightweights. + } + + public void setBounds(int x, int y, int z, int width, int height) + { + // Nothing to do here for lightweights. + } + + public boolean isReparentSupported() + { + // Nothing to do here for lightweights. + return true; + } + + public void layout() + { + // Nothing to do here for lightweights. + } + + public boolean requestFocus(Component lightweightChild, boolean temporary, + boolean focusedWindowChangeAllowed, + long time, sun.awt.CausedFocusEvent.Cause cause) + { + // Always grant focus request. + return true; + } + +} |