Improve blueprint selection dialog

Use a more specialized dialog to select the source project for copying a
checkstyle configuration. This brings several benefits:

* allows filtering the projects via search mask
* automatically sets selection to first project in list
* filter out closed projects (or otherwise inaccessible projects)
* enable OK button only if there is a selection

Author: Bananeweizen

net.sf.eclipsecs.ui/src/net/sf/eclipsecs/ui/actions/ConfigureProjectFromBluePrintAction.java

@@ -20,36 +20,36 @@
 
 package net.sf.eclipsecs.ui.actions;
 
-import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;
-
-import net.sf.eclipsecs.core.config.CheckConfigurationWorkingCopy;
-import net.sf.eclipsecs.core.config.ICheckConfiguration;
-import net.sf.eclipsecs.core.config.ICheckConfigurationWorkingSet;
-import net.sf.eclipsecs.core.projectconfig.IProjectConfiguration;
-import net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory;
-import net.sf.eclipsecs.core.projectconfig.ProjectConfigurationWorkingCopy;
-import net.sf.eclipsecs.core.util.CheckstylePluginException;
-import net.sf.eclipsecs.ui.CheckstyleUIPlugin;
-import net.sf.eclipsecs.ui.Messages;
+import java.util.stream.Collectors;
 
 import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.resources.WorkspaceJob;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.action.IAction;
-import org.eclipse.jface.viewers.ArrayContentProvider;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.window.Window;
 import org.eclipse.ui.IObjectActionDelegate;
 import org.eclipse.ui.IWorkbenchPart;
-import org.eclipse.ui.dialogs.ListDialog;
+import org.eclipse.ui.dialogs.ElementListSelectionDialog;
 import org.eclipse.ui.model.WorkbenchLabelProvider;
 
+import net.sf.eclipsecs.core.config.CheckConfigurationWorkingCopy;
+import net.sf.eclipsecs.core.config.ICheckConfiguration;
+import net.sf.eclipsecs.core.config.ICheckConfigurationWorkingSet;
+import net.sf.eclipsecs.core.projectconfig.IProjectConfiguration;
+import net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory;
+import net.sf.eclipsecs.core.projectconfig.ProjectConfigurationWorkingCopy;
+import net.sf.eclipsecs.core.util.CheckstylePluginException;
+import net.sf.eclipsecs.ui.CheckstyleUIPlugin;
+import net.sf.eclipsecs.ui.Messages;
+
 /**
  * Action to configure one ore more projects at once by using another project as
  * blueprint.
@@ -79,18 +79,17 @@ public void selectionChanged(IAction action, ISelection selection) {
 
   @Override
   public void run(IAction action) {
-
-    IProject[] projects = CheckstyleUIPlugin.getWorkspace().getRoot().getProjects();
-    List<IProject> filteredProjects = new ArrayList<>();
-    Collections.addAll(filteredProjects, projects);
+    List<IProject> filteredProjects = Arrays
+            .stream(ResourcesPlugin.getWorkspace().getRoot().getProjects())
+            .filter(IProject::isAccessible)
+            .collect(Collectors.toList());
 
     filteredProjects.removeAll(mSelectedProjects);
 
-    ListDialog dialog = new ListDialog(mPart.getSite().getShell());
+    ElementListSelectionDialog dialog = new ElementListSelectionDialog(mPart.getSite().getShell(),
+            new WorkbenchLabelProvider());
+    dialog.setElements(filteredProjects.toArray(new IProject[0]));
     dialog.setHelpAvailable(false);
-    dialog.setInput(filteredProjects);
-    dialog.setContentProvider(new ArrayContentProvider());
-    dialog.setLabelProvider(new WorkbenchLabelProvider());
     dialog.setMessage(Messages.ConfigureProjectFromBluePrintAction_msgSelectBlueprintProject);
     dialog.setTitle(Messages.ConfigureProjectFromBluePrintAction_titleSelectBlueprintProject);
     if (Window.OK == dialog.open()) {