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org.apache.commons.jelly.tags.swt.GCTag |
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1 | /* |
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2 | * Copyright 2002,2004 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package org.apache.commons.jelly.tags.swt; |
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17 | ||
18 | import org.apache.commons.jelly.JellyTagException; |
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19 | import org.apache.commons.jelly.TagSupport; |
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20 | import org.apache.commons.jelly.XMLOutput; |
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21 | import org.eclipse.swt.graphics.Drawable; |
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22 | import org.eclipse.swt.graphics.GC; |
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23 | ||
24 | /** |
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25 | * Class to create a {@link GC} instance within Jelly SWT. |
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26 | * |
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27 | * @author <a href="mailto:crafterm@apache.org">Marcus Crafter</a> |
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28 | * @version CVS $Id: GCTag.java 155420 2005-02-26 13:06:03Z dirkv $ |
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29 | */ |
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30 | 0 | public class GCTag extends TagSupport { |
31 | ||
32 | /** Drawable name */ |
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33 | private Drawable drawable; |
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34 | ||
35 | /** Variable name */ |
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36 | private String var; |
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37 | ||
38 | /** |
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39 | * Obtain the {@link Drawable} name for this {@link GC}. |
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40 | * |
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41 | * @return a {@link GC} {@link Drawable} |
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42 | */ |
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43 | public Drawable getDrawable() { |
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44 | 0 | return this.drawable; |
45 | } |
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46 | ||
47 | /** |
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48 | * Set the {@link Drawable} name for this {@link GC}. |
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49 | * |
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50 | * @param drawable a {@link GC} {@link Drawable} |
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51 | */ |
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52 | public void setDrawable(final Drawable drawable) { |
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53 | 0 | this.drawable = drawable; |
54 | 0 | } |
55 | ||
56 | /** |
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57 | * Sets the variable name. |
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58 | * |
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59 | * @param var the variable name of this {@link GC} instance |
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60 | */ |
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61 | public void setVar(final String var) { |
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62 | 0 | this.var = class="keyword">var; |
63 | 0 | } |
64 | ||
65 | /** |
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66 | * Obtain the variable name. |
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67 | * |
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68 | * @return the variable name of this {@link GC} instance |
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69 | */ |
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70 | public String getVar() { |
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71 | 0 | return this.var; |
72 | } |
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73 | ||
74 | // Tag interface |
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75 | //------------------------------------------------------------------------- |
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76 | ||
77 | /** |
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78 | * Creates a {@link GC} instance and stores it in the Context under a |
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79 | * particular variable name. Note, {@link GC} objects can only be created on |
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80 | * {@link Drawable} objects. |
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81 | * |
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82 | * @param output {@link XMLOutput} reference |
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83 | * @throws JellyTagException if an error occurs |
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84 | * @see org.apache.commons.jelly.Tag#doTag(org.apache.commons.jelly.XMLOutput) |
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85 | */ |
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86 | public void doTag(final XMLOutput output) throws JellyTagException { |
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87 | // invoke by body just in case some nested tag configures me |
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88 | 0 | invokeBody(output); |
89 | ||
90 | 0 | final boolean nullDrawable = drawable == null; |
91 | 0 | final boolean drawableParent = drawable instanceof Drawable; |
92 | ||
93 | 0 | if (nullDrawable || !drawableParent) { |
94 | 0 | throw new JellyTagException( |
95 | "This tag must specify a Drawable attribute (ie. Image or Control)" |
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96 | ); |
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97 | } |
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98 | ||
99 | 0 | if (var == null) { |
100 | 0 | throw new JellyTagException("This tag requires a context variable name"); |
101 | } |
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102 | ||
103 | // store the GC in the context |
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104 | 0 | context.setVariable(var, new GC(drawable)); |
105 | 0 | } |
106 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |