diff options
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkCheckboxPeer.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkCheckboxPeer.java | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkCheckboxPeer.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkCheckboxPeer.java new file mode 100644 index 000000000..4a41d0696 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkCheckboxPeer.java @@ -0,0 +1,255 @@ +/* GtkCheckboxPeer.java -- Implements CheckboxPeer with GTK + Copyright (C) 1998, 1999, 2002, 2003, 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.gtk; + +import java.awt.Checkbox; +import java.awt.CheckboxGroup; +import java.awt.event.ItemEvent; +import java.awt.peer.CheckboxPeer; +import java.util.WeakHashMap; + +/** + * This class wraps either a GtkCheckButton or a GtkOptionButton + * depending on if this peer's owner belongs to a CheckboxGroup. + */ +public class GtkCheckboxPeer extends GtkComponentPeer + implements CheckboxPeer +{ + // The CheckboxGroup to which this GtkCheckboxPeer's owner belongs. + public CheckboxGroup current_group; + // The current state of the GTK checkbox. + private boolean currentState; + + // A map from CheckboxGroup to GSList* GTK option group pointer. + private static WeakHashMap<CheckboxGroup,Long> groupMap + = new WeakHashMap<CheckboxGroup,Long>(); + + public native void createCheckButton (); + public native void createRadioButton (long groupPointer); + + public native void addToGroup (long groupPointer); + public native void removeFromGroup (); + public native void switchToGroup (long groupPointer); + + public native void connectSignals (); + + /** + * Overridden to set Font of label inside button. + */ + protected native void gtkWidgetModifyFont(String name, int style, int size); + native void gtkButtonSetLabel (String label); + native void gtkToggleButtonSetActive (boolean is_active); + + public GtkCheckboxPeer (Checkbox c) + { + super (c); + } + + public void create () + { + Checkbox checkbox = (Checkbox) awtComponent; + current_group = checkbox.getCheckboxGroup (); + if (current_group == null) + { + // Initially we're not part of a group so we're backed by a + // GtkCheckButton. + createCheckButton(); + } + else + { + // Initially we're part of a group. + + // See if this group is already stored in our map. + Long groupPointer = null; + synchronized (groupMap) + { + groupPointer = groupMap.get(current_group); + } + + if (groupPointer == null) + { + // We don't know about this group. Create a new native + // group pointer for this group and store it in our map. + createRadioButton(0); + } + else + { + // We already know about this group. Pass the + // corresponding native group pointer value to the native + // create method. + createRadioButton(groupPointer.longValue()); + } + } + currentState = checkbox.getState(); + gtkToggleButtonSetActive(currentState); + + String label = checkbox.getLabel(); + if (label != null) + gtkButtonSetLabel(label); + } + + /** + * Sets native GtkCheckButton is state is different from current + * state. Will set currentState to state to prevent posting an + * event since events should only be posted for user initiated + * clicks on the GtkCheckButton. + */ + public synchronized void setState (boolean state) + { + if (currentState != state) + { + currentState = state; + gtkToggleButtonSetActive(state); + } + } + + public void setLabel (String label) + { + gtkButtonSetLabel (label); + } + + public void setCheckboxGroup (CheckboxGroup group) + { + if (current_group == null && group != null) + { + // This peer's owner is currently not in a group, and now + // we're adding it to a group. This means that the backing + // GtkWidget will change from a GtkCheckButton to a + // GtkRadioButton. + + current_group = group; + + // See if the new group is already stored in our map. + Long groupPointer = null; + synchronized (groupMap) + { + groupPointer = groupMap.get(current_group); + } + + if (groupPointer == null) + { + // We don't know about this group. Create a new native + // group pointer for this group and store it in our map. + addToGroup(0); + } + else + { + // We already know about this group. Pass the + // corresponding native group pointer value to the native + // create method. + addToGroup(groupPointer.longValue()); + } + } + else if (current_group != null && group == null) + { + // This peer's owner is currently in a group, and now we're + // removing it from a group. This means that the backing + // GtkWidget will change from a GtkRadioButton to a + // GtkCheckButton. + removeFromGroup(); + current_group = null; + } + else if (current_group == null && group == null) + { + // This peer's owner is currently not in a group, and we're + // not adding it to a group, so simply return. + return; + } + else if (current_group != group) + { + // This peer's owner is currently in a group, and now we're + // putting it in another group. This means that we must + // remove the backing GtkRadioButton from one group and add it + // to the other group. + + current_group = group; + + // See if the new group is already stored in our map. + Long groupPointer = null; + synchronized (groupMap) + { + groupPointer = groupMap.get(current_group); + } + + if (groupPointer == null) + { + // We don't know about this group. Create a new native + // group pointer for this group and store it in our map. + switchToGroup(0); + } + else + { + // We already know about this group. Pass the + // corresponding native group pointer value to the native + // create method. + switchToGroup(groupPointer.longValue()); + } + } + } + + // Override the superclass postItemEvent so that the peer doesn't + // need information that we have. + // called back by native side: item_toggled_cb + public synchronized void postItemEvent(Object item, boolean state) + { + // Only fire event is state actually changed. + if (currentState != state) + { + currentState = state; + super.postItemEvent(awtComponent, + state ? ItemEvent.SELECTED : ItemEvent.DESELECTED); + } + } + + public void addToGroupMap(long groupPointer) + { + synchronized (groupMap) + { + groupMap.put(current_group, new Long (groupPointer)); + } + } + + public void dispose () + { + groupMap.clear(); + current_group = null; + currentState = false; + super.dispose (); + } +} |