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Java > Open Source Codes > org > openlaszlo > iv > flash > commands > SetAlphaCommand


1 /*
2  * $Id: SetAlphaCommand.java,v 1.5 2002/06/12 23:54:14 skavish Exp $
3  *
4  * ===========================================================================
5  *
6  * The JGenerator Software License, Version 1.0
7  *
8  * Copyright (c) 2000 Dmitry Skavish (skavish@usa.net). All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions are met:
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13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
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19  * distribution.
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21  * 3. The end-user documentation included with the redistribution, if
22  * any, must include the following acknowlegement:
23  * "This product includes software developed by Dmitry Skavish
24  * (skavish@usa.net, http://www.flashgap.com/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
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30  * For written permission, please contact skavish@usa.net.
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32  * 5. Products derived from this software may not be called "The JGenerator"
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50
51 package org.openlaszlo.iv.flash.commands;
52
53 import org.openlaszlo.iv.flash.parser.*;
54 import org.openlaszlo.iv.flash.api.*;
55 import org.openlaszlo.iv.flash.util.*;
56
57 import org.openlaszlo.iv.flash.context.Context;
58
59 public class SetAlphaCommand extends GenericCommand {
60
61     public SetAlphaCommand() {}
62
63     public void doCommand( FlashFile file, Context context, Script parent, int frameNum ) throws IVException {
64         Instance inst = getCommandInstance(file, context, parent, frameNum);
65
66         // process corresponding flash def first
67 processFlashDef(inst, file, context);
68
69         String JavaDoc percent = getParameter( context, "percent" );
70         int f = 256;
71
72         if( percent != null ) {
73             try {
74                 f = (int) (Double.valueOf(percent).doubleValue()*256/100.0);
75                 if( f < 0 || f > 256 ) {
76                     Log.logRB(Resource.INVALALPHA, new Object JavaDoc[] {percent, getCommandName()});
77                     f = 256;
78                 }
79             } catch( NumberFormatException JavaDoc e ) {
80                 Log.logRB(Resource.INVALALPHA, new Object JavaDoc[] {percent, getCommandName()});
81                 f = 256;
82             }
83         }
84         if( inst.cxform == null ) {
85             inst.cxform = CXForm.newIdentity(true);
86         }
87         inst.cxform.setAlphaMul(f);
88     }
89
90 }
91
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