Developing the Color Modeling Diagram in Java

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46 Developing the Color Modeling Diagram
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public class DiagramAppearancePreferencePage extends AppearancePreferencePage{ private String PINK_COLOR_LABEL = MessagesAppearancePreferencePage_pinkArchetypeColor_label; private String YELLOW_COLOR_LABEL = MessagesAppearancePreferencePage_yellowArchetypeColor_label; private String GREEN_COLOR_LABEL = MessagesAppearancePreferencePage_greenArchetypeColor_label; private String BLUE_COLOR_LABEL = MessagesAppearancePreferencePage_blueArchetypeColor_label; private String GRAY_COLOR_LABEL = MessagesAppearancePreferencePage_grayArchetypeColor_label; private String ARCHETYPE_GROUPBOX_LABEL = MessagesAppearancePreferencePage_archetypeColorGroup_label; public static final String PREF_MI_ARCHETYPE_COLOR = "Appearancemi_ArchetypeColor"; public static final String PREF_ROLE_ARCHETYPE_COLOR "Appearancerole_ArchetypeColor"; public static final String PREF_PPT_ARCHETYPE_COLOR = "Appearanceppt_ArchetypeColor"; public static final String PREF_DESC_ARCHETYPE_COLOR = "Appearancedesc_ArchetypeColor"; public static final String PREF_PIP_ARCHETYPE_COLOR = "Appearancepip_ArchetypeColor"; private ColorFieldEditor pinkArchetypeColorEditor = null; private ColorFieldEditor yellowArchetypeColorEditor = null; private ColorFieldEditor greenArchetypeColorEditor = null; private ColorFieldEditor blueArchetypeColorEditor = null; private ColorFieldEditor grayArchetypeColorEditor = null; public DiagramAppearancePreferencePage() { setPreferenceStore(DncDiagramEditorPlugingetInstance() getPreferenceStore()); } @Override protected void addFields (Composite parent) { Composite main = createPageLayout(parent); createFontAndColorGroup(main); createArchetypeColorGroup(main); } public static void initArchetypeDefaults(IPreferenceStore store) { PreferenceConvertersetDefault(store, PREF_MI_ARCHETYPE_COLOR, new Color(null, 250, 145, 145)getRGB()); PreferenceConvertersetDefault(store, PREF_ROLE_ARCHETYPE_COLOR, new Color(null, 238, 245, 165)getRGB()); PreferenceConvertersetDefault(store, PREF_PPT_ARCHETYPE_COLOR, new Color(null, 124, 179, 77)getRGB()); PreferenceConvertersetDefault(store, PREF_DESC_ARCHETYPE_COLOR, new Color(null, 86, 145, 215)getRGB());
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CHAPTER 4 Developing a DSL Graphical Notation
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PreferenceConvertersetDefault(store, PREF_PIP_ARCHETYPE_COLOR, new Color(null, 124, 124, 124)getRGB()); // Override the normal default line color PreferenceConvertersetDefault(store, IPreferenceConstantsPREF_LINE_COLOR, new Color(null, 124, 124, 124)getRGB()); } protected Composite createArchetypeColorGroup(Composite parent) { Group group = new Group(parent, SWTNONE); groupsetLayoutData(new GridData(GridDataFILL_HORIZONTAL)); groupsetLayout(new GridLayout(3, false)); Composite composite = new Composite(group, SWTNONE); GridLayout gridLayout = new GridLayout(3, false); compositesetLayout(gridLayout); GridData gridData = new GridData(GridDataFILL_HORIZONTAL); gridDatagrabExcessHorizontalSpace = true; gridDatahorizontalSpan = 3; compositesetLayoutData(gridData); groupsetText(ARCHETYPE_GROUPBOX_LABEL); addArchetypeColorFields(composite); GridLayout layout = new GridLayout(); layoutnumColumns = 3; layoutmarginWidth = 0; layoutmarginHeight = 0; layouthorizontalSpacing = 8; compositesetLayout(layout); return group; } protected void addArchetypeColorFields(Composite composite) { pinkArchetypeColorEditor = new ColorFieldEditor( PREF_MI_ARCHETYPE_COLOR, PINK_COLOR_LABEL, composite); addField(pinkArchetypeColorEditor); pinkArchetypeColorEditorgetColorSelector()getButton() getAccessible()addAccessibleListener(new AccessibleAdapter() { public void getName(AccessibleEvent e) { String labelText = pinkArchetypeColorEditorgetLabelText(); labelText = ActionremoveMnemonics(labelText); eresult = labelText; } }); // Repeat initialization of each ColorFieldEditor } }
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To provide for localization, we add the strings just referenced to our
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Messages class and to the diagram plug-in s messagesproperties file Note
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46 Developing the Color Modeling Diagram
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that the default values for each archetype color are provided previously, in RGB To initialize the preferences, we look to the generated DiagramPreference Initializer class We need to have the initializer call our initArchetype Defaults() method, provided earlier, as shown in the modified implementation here:
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public void initializeDefaultPreferences() { IPreferenceStore store = getPreferenceStore(); DiagramPrintingPreferencePageinitDefaults(store); DiagramGeneralPreferencePageinitDefaults(store); DiagramAppearancePreferencePageinitDefaults(store); DiagramAppearancePreferencePageinitArchetypeDefaults(store); DiagramConnectionsPreferencePageinitDefaults(store); DiagramRulersAndGridPreferencePageinitDefaults(store); }
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These are the additions made to the orgeclipsedncdiagrampart
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Messages class:
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/** * @generated */ public class Messages extends NLS { /** * @generated */ static { NLSinitializeMessages("messages", Messagesclass); //$NON-NLS-1$ } /** * @generated */ private Messages() { } public static String AppearancePreferencePage_archetypeColorGroup_label; public static String AppearancePreferencePage_pinkArchetypeColor_label; public static String AppearancePreferencePage_yellowArchetypeColor_label; public static String AppearancePreferencePage_greenArchetypeColor_label; public static String AppearancePreferencePage_blueArchetypeColor_label; public static String AppearancePreferencePage_grayArchetypeColor_label; // }
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And these are the additions we made to the messagesproperties file:
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AppearancePreferencePage_archetypeColorGroup_label=Archetype colors AppearancePreferencePage_pinkArchetypeColor_label= Pinks (moment-interval, mi-detail): AppearancePreferencePage_yellowArchetypeColor_label=Yellows (role): AppearancePreferencePage_greenArchetypeColor_label= Greens (party, place, thing): AppearancePreferencePage_blueArchetypeColor_label=Blues (description): AppearancePreferencePage_grayArchetypeColor_label=Plug-in point:
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At this point, we can launch our diagram and see the properties in action, although they have no effect on the diagram because they re not incorporated into our EditPart code yet Again, using black-and-white images does little to illustrate the use of color modeling, as seen in Figure 4-46
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Figure 4-46
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Archetype color preferences
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Turning finally to our EditPart code, we use MomentIntervalEditPart as our testbed Adding the following code makes our preferences-based color
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46 Developing the Color Modeling Diagram
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options functional To begin, we add an inner class, PreferenceProperty ChangeListener, that will detect a change in the appropriate property and invoke the updateArchetypeColor() method To initialize and register this listener, we override the addNotationalListeners() method
private PreferencePropertyChangeListener preferenceListener; protected class PreferencePropertyChangeListener implements IPropertyChangeListener { public void propertyChange(PropertyChangeEvent event) { if (eventgetProperty()equals( DiagramAppearancePreferencePagePREF_MI_ARCHETYPE_COLOR)) { updateArchetypeColor(); } } } @Override protected void addNotationalListeners() { superaddNotationalListeners(); initPreferenceStoreListener(); } protected void updateArchetypeColor() { getFigure()setForegroundColor(getPreferenceColor()); getFigure()repaint(); } private Color getPreferenceColor() { IPreferenceStore preferenceStore = (IPreferenceStore) getDiagramPreferencesHint()getPreferenceStore(); orgeclipseswtgraphicsRGB archetypeColorPreference = PreferenceConvertergetColor(preferenceStore, DiagramAppearancePreferencePagePREF_MI_ARCHETYPE_COLOR); return new Color(null, archetypeColorPreference); } private void initPreferenceStoreListener() { preferenceListener = new PreferencePropertyChangeListener(); IPreferenceStore preferenceStore = (IPreferenceStore) getDiagramPreferencesHint()getPreferenceStore(); preferenceStoreaddPropertyChangeListener(preferenceListener); } @Override protected void setForegroundColor(Color color) { supersetForegroundColor(getPreferenceColor()); }
The overridden setForegroundColor() method and the preference listener both obtain the appropriate color from the preference store, as shown in