Launching a wizard in Java

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You can hook a wizard into the Eclipse framework using one of the predefined wizard extension points, or you can manually launch a wizard as a result of a user action
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11251 Wizard extension points
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If you want Eclipse to automatically provide an action delegate and display your wizard in a predefined location, you can extend one of the following wizard extension points
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orgeclipseuiexportWizards Adds a nested wizard in the Export wizard, which is displayed by selecting the File > Export command Wizard classes associated with this extension point must implement the orgeclipseuiIExportWizard interface
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orgeclipseuiimportWizards Adds a nested wizard in the Import wizard, which is displayed by selecting File > Import Wizard classes associated with this extension point must implement the orgeclipse uiIImportWizard interface orgeclipseuinewWizards Adds a nested wizard in the New wiz-
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ard, which is displayed by selecting File > New > Other Wizard classes associated with this extension point must implement the orgeclipse uiINewWizard interface These three extension points share several common attributes:
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class The wizard class to be launched by the parent wizard This wizard must implement the appropriate interface for the extension point as outlined earlier The class is instantiated using its no argument constructor, but can be parameterized using the IExecutableExtension interface (see Section 215, Types Specified in an Extension Point, on page 793) icon The icon associated with this wizard, similar to action images (see Section 664, Action images, on page 247) id The unique identifier for the wizard name The human-readable name for the wizard
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You can specify a filter for both orgeclipseuiexportWizards and orgeclipseuiimportWizards extension points using the selection subelement By using a filter, your export or import wizard only appears when the appropriately named or typed element is selected The orgeclipseuinewWizards extension point requires an additional category attribute to identify how wizards are to be hierarchically organized This category is declared using the same extension point with the following attributes:
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id The unique identifier for the category name The human-readable name for the category parentCategory The unique identifier for the category in which the category will appear, if there is one
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The orgeclipseuinewWizards extension point also allows you to specify a primaryWizard A primary wizard is emphasized in the new wizard dialog and exists so that product managers can emphasize a set of wizards for their products This element is not intended to be used by plug-in developers
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If a wizard declared using one of the aforementioned extension points implements the IExecutableExtension interface, then Eclipse will communicate additional initialization information encoded in the declaration to the wizard using that interface (see Section 215, Types Specified in an Extension Point, on page 793) You can use the plug-in manifest editor to quickly create a wizard class with stub methods that is hooked into one of the wizard extension points In the plug-in manifest editor, navigate to the Extensions page and click the Add button to add, for example, an orgeclipseuinewWizards extension (see Section 661, Defining a workbench window menu, on page 243 for an example of adding extensions) Then, right-click on the orgeclipse uinewWizards extension in the plug-in manifest editor and select New > wizard Select the wizard extension that was added to edit its properties (see Figure 11 8)
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Figure 11 8
The extension element details showing newWizard extension
Clicking on the class: label to the right of the class field will open a New Java Class wizard in which a new class can be created (see Figure 11 9)
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Figure 11 9
Java New Java Class wizard showing class creation
Completing the required fields generates a new Java class and hooks that class into the plug-in manifest The following are the generated plug-in manifest entry and stub Java wizard class
<extension point="orgeclipseuinewWizards"> <wizard name="comqualityeclipsefavoriteswizard1" class="comqualityeclipsefavoritesNewWizard1" id="comqualityeclipsefavoriteswizard1"> </wizard> </extension> public class NewWizard1 extends Wizard implements INewWizard { public void init( IWorkbench workbench, IStructuredSelection selection ) { // Initialization code here } public boolean performFinish() { // Perform operation here return false; } }