Source Code Cross Referenced for PPCScrollbarPeer.java in  » 6.0-JDK-Modules » j2me » sun » awt » pocketpc » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » sun.awt.pocketpc 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * @(#)PPCScrollbarPeer.java	1.8 06/10/10
003:         * 
004:         * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation. 
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt). 
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA 
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions. 
025:         */
026:
027:        /**
028:         * PPCScrollbarPeer.java
029:         *
030:         * @author Created by Omnicore CodeGuide
031:         */package sun.awt.pocketpc;
032:
033:        import sun.awt.peer.*;
034:        import java.awt.*;
035:        import java.awt.event.*;
036:
037:        class PPCScrollbarPeer extends PPCComponentPeer implements 
038:                ScrollbarPeer {
039:            private static native void initIDs();
040:
041:            static {
042:                initIDs();
043:            }
044:
045:            boolean ignore;
046:
047:            // ComponentPeer overrides
048:            public Dimension getMinimumSize() {
049:                if (((Scrollbar) target).getOrientation() == Scrollbar.VERTICAL) {
050:                    return new Dimension(18, 50);
051:                } else {
052:                    return new Dimension(50, 18);
053:                }
054:            }
055:
056:            // ScrollbarPeer implementation
057:            public void setValues(int value, int visible, int minimum,
058:                    int maximum) {
059:                if (!ignore) {
060:                    setValuesNative(value, visible, minimum, maximum);
061:                }
062:            }
063:
064:            native void setValuesNative(int value, int visible, int minimum,
065:                    int maximum);
066:
067:            public native void setLineIncrement(int l);
068:
069:            public native void setPageIncrement(int l);
070:
071:            // Toolkit & peer internals
072:
073:            PPCScrollbarPeer(Scrollbar target) {
074:                super (target);
075:                ignore = false;
076:            }
077:
078:            native void create(PPCComponentPeer parent);
079:
080:            void initialize() {
081:                Scrollbar sb = (Scrollbar) target;
082:                setValues(sb.getValue(), sb.getVisibleAmount(),
083:                        sb.getMinimum(), sb.getMaximum());
084:                super .initialize();
085:            }
086:
087:            void clearRectBeforePaint(Graphics g, Rectangle r) {
088:                // Overload to do nothing for native components
089:            }
090:
091:            // native callbacks
092:
093:            void lineUp(int value) {
094:                PPCToolkit.postEvent(new Adjustor((Scrollbar) target, value,
095:                        this , AdjustmentEvent.UNIT_DECREMENT));
096:            }
097:
098:            void lineDown(int value) {
099:                PPCToolkit.postEvent(new Adjustor((Scrollbar) target, value,
100:                        this , AdjustmentEvent.UNIT_INCREMENT));
101:            }
102:
103:            void pageUp(int value) {
104:                PPCToolkit.postEvent(new Adjustor((Scrollbar) target, value,
105:                        this , AdjustmentEvent.BLOCK_DECREMENT));
106:            }
107:
108:            void pageDown(int value) {
109:                PPCToolkit.postEvent(new Adjustor((Scrollbar) target, value,
110:                        this , AdjustmentEvent.BLOCK_INCREMENT));
111:            }
112:
113:            void dragBegin(int value) {
114:                // New event model event -- not supported yet.
115:                //	((Scrollbar)target).setValue(value);
116:                //	WToolkit.postEvent(new Event(target, Event.SCROLL_BEGIN, new Integer(value)));
117:            }
118:
119:            void dragAbsolute(int value) {
120:                PPCToolkit.postEvent(new Adjustor((Scrollbar) target, value,
121:                        this , AdjustmentEvent.TRACK));
122:            }
123:
124:            void dragEnd(int value) {
125:                // New event model event -- not supported yet.
126:                //	((Scrollbar)target).setValue(value);
127:                //	WToolkit.postEvent(new Event(target, Event.SCROLL_END, new Integer(value)));
128:            }
129:
130:            /**
131:             * DEPRECATED
132:             */
133:            public Dimension minimumSize() {
134:                return getMinimumSize();
135:            }
136:
137:            /**
138:             * This is used to change the Scrollbar on another thread without
139:             * deadlocking.
140:             */
141:            class Adjustor extends AWTEvent implements  java.awt.ActiveEvent {
142:
143:                Adjustor(Scrollbar sb, int value, PPCScrollbarPeer peer,
144:                        int type) {
145:                    super (peer, 0);
146:                    this .sb = sb;
147:                    this .value = value;
148:                    this .peer = peer;
149:                    this .type = type;
150:                    consumed = true;
151:                }
152:
153:                public void dispatch() {
154:                    sb.setValue(value);
155:                    peer.ignore = true;
156:                    PPCToolkit.postEvent(new AdjustmentEvent(sb,
157:                            AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED, type,
158:                            value));
159:                    peer.ignore = false;
160:                }
161:
162:                int value;
163:                Scrollbar sb;
164:                PPCScrollbarPeer peer;
165:                int type;
166:            }
167:        }
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