1 /*

     2  * Copyright 1995-2000 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.awt.motif;

    27 

    28 import java.awt.*;

    29 import java.awt.peer.*;

    30 import java.awt.event.*;

    31 

    32 public class MCheckboxPeer extends MComponentPeer implements CheckboxPeer {

    33     private boolean inUpCall = false;

    34     private boolean inInit=false;

    35 

    36     native void create(MComponentPeer parent);

    37     native void pSetState(boolean state);

    38     native boolean pGetState();

    39 

    40     public native void setLabel(String label);

    41     public native void setCheckboxGroup(CheckboxGroup g);

    42 

    43 

    44     void initialize() {

    45         Checkbox t = (Checkbox)target;

    46         inInit=true;

    47 

    48         setState(t.getState());

    49         setCheckboxGroup(t.getCheckboxGroup());

    50         super.initialize();

    51         inInit=false;

    52     }

    53 

    54     public MCheckboxPeer(Checkbox target) {

    55         super(target);

    56     }

    57 

    58     public boolean isFocusable() {

    59         return true;

    60     }

    61 

    62     public void setState(boolean state) {

    63         if (inInit) {

    64                 pSetState(state);

    65         } else if (!inUpCall && (state != pGetState())) {

    66                 pSetState(state);

    67                 // 4135725 : do not notify on programatic changes

    68                 // notifyStateChanged(state);

    69         }

    70     }

    71     private native int getIndicatorSize();

    72     private native int getSpacing();

    73 

    74     public Dimension getMinimumSize() {

    75         String lbl = ((Checkbox)target).getLabel();

    76         if (lbl == null) {

    77             lbl = "";

    78         }

    79         FontMetrics fm = getFontMetrics(target.getFont());

    80         /*

    81          * Spacing (number of pixels between check mark and label text) is

    82          * currently set to 0, but in case it ever changes we have to add

    83          * it. 8 is a heuristic number. Indicator size depends on font

    84          * height, so we don't need to include it in checkbox's height

    85          * calculation.

    86          */

    87         int wdth = fm.stringWidth(lbl) + getIndicatorSize() + getSpacing() + 8;

    88         int hght = Math.max(fm.getHeight() + 8, 15);

    89         return new Dimension(wdth, hght);

    90     }

    91 

    92 

    93     void notifyStateChanged(boolean state) {

    94         Checkbox cb = (Checkbox) target;

    95         ItemEvent e = new ItemEvent(cb,

    96                           ItemEvent.ITEM_STATE_CHANGED,

    97                           cb.getLabel(),

    98                           state ? ItemEvent.SELECTED : ItemEvent.DESELECTED);

    99         postEvent(e);

   100     }

   101 

   102 

   103     // NOTE: This method is called by privileged threads.

   104     //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!

   105     void action(boolean state) {

   106         final Checkbox cb = (Checkbox)target;

   107         final boolean newState = state;

   108         MToolkit.executeOnEventHandlerThread(cb, new Runnable() {

   109             public void run() {

   110                 CheckboxGroup cbg = cb.getCheckboxGroup();

   111                 /* Bugid 4039594. If this is the current Checkbox in

   112                  * a CheckboxGroup, then return to prevent deselection.

   113                  * Otherwise, it's logical state will be turned off,

   114                  * but it will appear on.

   115                  */

   116                 if ((cbg != null) && (cbg.getSelectedCheckbox() == cb) &&

   117                     cb.getState()) {

   118                   inUpCall = false;

   119                   cb.setState(true);

   120                   return;

   121                 }

   122                 // All clear - set the new state

   123                 cb.setState(newState);

   124                 notifyStateChanged(newState);

   125             } // run()

   126         });

   127     } // action()

   128 

   129 

   130 

   131     static final int SIZE = 19;

   132     static final int BORDER = 4;

   133     static final int SIZ = SIZE - BORDER*2 - 1;

   134 

   135     /*

   136      * Print the native component by rendering the Motif look ourselves.

   137      * ToDo(aim): needs to query native motif for more accurate size and

   138      * color information; need to render check mark.

   139      */

   140     public void print(Graphics g) {

   141         Checkbox cb = (Checkbox)target;

   142         Dimension d = cb.size();

   143         Color bg = cb.getBackground();

   144         Color fg = cb.getForeground();

   145         Color shadow = bg.darker();

   146         int x = BORDER;

   147         int y = ((d.height - SIZE) / 2) + BORDER;

   148 

   149         g.setColor(cb.getState()? shadow : bg);

   150 

   151         if (cb.getCheckboxGroup() != null) {

   152             g.fillOval(x, y, SIZ, SIZ);

   153             draw3DOval(g, bg, x, y, SIZ, SIZ, !(cb.getState()));

   154             if (cb.getState()) {

   155                 g.setColor(fg);

   156                 g.fillOval(x + 3, y + 3, SIZ - 6, SIZ - 6);

   157             }

   158         } else {

   159             g.fillRect(x, y, SIZ, SIZ);

   160             draw3DRect(g, bg, x, y, SIZ, SIZ, !(cb.getState()));

   161             if (cb.getState()) {

   162                 g.setColor(fg);

   163                 g.drawLine(x+1, y+1, x+SIZ-1, y+SIZ-1);

   164                 g.drawLine(x+1, y+SIZ-1, x+SIZ-1, y+1);

   165             }

   166         }

   167         g.setColor(fg);

   168         String lbl = cb.getLabel();

   169         if (lbl != null) {

   170             // REMIND: align

   171             g.setFont(cb.getFont());

   172             FontMetrics fm = g.getFontMetrics();

   173             g.drawString(lbl, SIZE,

   174                          (d.height + fm.getMaxAscent() - fm.getMaxDescent()) / 2);

   175         }

   176 

   177         target.print(g);

   178     }

   179 

   180     /**

   181      * DEPRECATED

   182      */

   183     public Dimension minimumSize() {

   184             return getMinimumSize();

   185     }

   186 

   187 }