Provide a New Wizard class for the Template Selection page.

Makes the TemplateWizard class now manditory as the parent for
template wizards.

Change-Id: I52ec2a1ba130ac00b9a0294bdd15beeff5ed2c1c

bundles/org.eclipse.tools.templates.ui/schema/templates.exsd

@@ -85,7 +85,7 @@
                   
                </documentation>
                <appinfo>
-                  <meta.attribute kind="java" basedOn=":org.eclipse.ui.INewWizard"/>
+                  <meta.attribute kind="java" basedOn="org.eclipse.tools.templates.ui.TemplateWizard:"/>
                </appinfo>
             </annotation>
          </attribute>

bundles/org.eclipse.tools.templates.ui/src/org/eclipse/tools/templates/ui/NewWizard.java

@@ -0,0 +1,67 @@
+package org.eclipse.tools.templates.ui;
+
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.jface.wizard.Wizard;
+import org.eclipse.ui.INewWizard;
+import org.eclipse.ui.IWorkbench;
+
+/**
+ * Wizard to be used to launch the template selection page.
+ */
+public class NewWizard extends Wizard implements INewWizard {
+
+	private final String[] tags;
+
+	private String templateSelectionPageTitle;
+	private IWorkbench workbench;
+	private IStructuredSelection selection;
+	private TemplateSelectionPage templateSelectionPage;
+
+	protected NewWizard(String... tags) {
+		this.tags = tags;
+		setForcePreviousAndNextButtons(true);
+	}
+
+	protected void setTemplateSelectionPageTitle(String title) {
+		this.templateSelectionPageTitle = title;
+		if (templateSelectionPage != null) {
+			templateSelectionPage.setTitle(title);
+		}
+	}
+
+	@Override
+	public void addPages() {
+		templateSelectionPage = new TemplateSelectionPage("templateSelection", tags); //$NON-NLS-1$
+		templateSelectionPage.setTitle(templateSelectionPageTitle);
+		this.addPage(templateSelectionPage);
+	}
+
+	@Override
+	public void init(IWorkbench workbench, IStructuredSelection selection) {
+		this.workbench = workbench;
+		this.selection = selection;
+	}
+
+	/**
+	 * Initialize the template wizard that comes next.
+	 * 
+	 * @param nextWizard
+	 *            the next wizard to show
+	 */
+	public void initialize(INewWizard nextWizard) {
+		nextWizard.init(workbench, selection);
+	}
+
+	@Override
+	public boolean canFinish() {
+		// Need to check with the template wizard
+		return false;
+	}
+
+	@Override
+	public boolean performFinish() {
+		// The template wizard will do the real finish.
+		return true;
+	}
+
+}

bundles/org.eclipse.tools.templates.ui/src/org/eclipse/tools/templates/ui/TemplateSelectionPage.java

@@ -29,8 +29,6 @@ import org.eclipse.tools.templates.ui.internal.TagListViewer;
 import org.eclipse.tools.templates.ui.internal.Template;
 import org.eclipse.tools.templates.ui.internal.TemplateExtension;
 import org.eclipse.tools.templates.ui.internal.TemplateTable;
-import org.eclipse.ui.IWorkbenchWizard;
-import org.eclipse.ui.wizards.newresource.BasicNewResourceWizard;
 
 public class TemplateSelectionPage extends WizardPage {
 
@@ -99,9 +97,9 @@ public class TemplateSelectionPage extends WizardPage {
 		Template template = templateTable.getSelectedTemplate();
 		if (template != null) {
 			try {
-				IWorkbenchWizard nextWizard = template.getWizard();
+				NewWizard oldWizard = (NewWizard) getWizard();
-				BasicNewResourceWizard oldWizard = (BasicNewResourceWizard) getWizard();
+				TemplateWizard nextWizard = (TemplateWizard) template.getWizard();
-				nextWizard.init(oldWizard.getWorkbench(), oldWizard.getSelection());
+				oldWizard.initialize(nextWizard);
 				nextWizard.addPages();
 				return nextWizard.getPages()[0];
 			} catch (CoreException e) {