Adding functionality in Sample View - Show all projects in Sample View

How to show all resources in view?

To show all projects and all files / folders in tree structure, IResourceChangeListener interface need to be implemented in View class.

How to add actions / menu in Sample View?

1. To add actions and menus in View, org.eclipse.ui.viewActions extension need to be added.

Add viewActions extension

2. After adding this extension, add new "viewContribution" with the unique id* value. The targetID* value should be same as Sample view id value.

Add "viewContribution" under viewActions extension.

3. Adding Menu item - To create a new menu item, R-click on viewContribution and select "menu" option like below screenshot.

Add "menu" in View

4. Provide the id* and label* for this menu item like below screen-shot.

Properties of Sample Menu item.

5. After succefully create the menu item, create new group under this menu. R-click on "menu" and select "groupMarker" option. Provide the group name like: sampleGroupMarker.

Add sampleGroupMarker

6. Create another menu item (Collapse Menu), and provide the value of id*, label* and path like below screenshot.

Add another "menu" item

7. Create another group for this collapse menu and provide the name for it like: collapseGroupmarker.

Add groupMarker under Collapse Menu item

8. Create an Action : To create a new "action", R-click on "viewContribution" and select "action". Provide the all properties like below screenshot.

Note: Need to add icons file for this action in /icons folder.

Add "action" under viewContribution extension.

id*: SampleCode.collapseAction

class*: samplecode.source.view.CollapseAllActionDelegate

menubarPath: SampleCode.sampleMenu/SampleCode.collapseMenu/collapseGroupmarker

9. click on the class* link and a "New Java Class" dialog box will be opened. Click on "Finish" button. Java class will be created.

Create new java class dialog box

10. Run the project, one action button will be shown in Sample View toolbar like below screenshot and also Menu will be created for this Collapse All action.

Sample View

11. Adding functionality on Sample View for display all the projects from workspace:

Dependencies: org.eclipse.ui.ide

Open the SampleView.java file and modify the file with this code snippet:

A. samplecode.source.SampleView.java

package samplecode.source; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IResourceChangeEvent; import org.eclipse.core.resources.IResourceChangeListener; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.PartInitException; import org.eclipse.ui.ide.IDE; import org.eclipse.ui.part.ViewPart; import samplecode.Activator; import samplecode.source.view.SampleContentProvider; import samplecode.source.view.SampleLabelProvider; import samplecode.source.view.SampleViewCellModifier; public class SampleView extends ViewPart implements IResourceChangeListener { private TreeViewer tViewer; public SampleView() { Activator .getDefault() .getLog() .log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, SWT.OK, "Excaption occured.", null)); } @Override public void createPartControl(Composite parent) { tViewer = new TreeViewer(parent); /** * Provide the ContentProvider * The ContentProvider class needs to implement ITreeContentProvider */ tViewer.setContentProvider(new SampleContentProvider()); /** * Provider the LabelProvider * The labelProvider class extends LabelProvider */ tViewer.setLabelProvider(new SampleLabelProvider()); /** * Method that fills the Viewer with the Content * This invokes the getElements method in the ContentProvider */ tViewer.setInput(ResourcesPlugin.getWorkspace().getRoot()); // tViewer.setUseHashlookup(true); tViewer.setColumnProperties(new String[] { "" }); CellEditor[] cellEditor = new CellEditor[1]; cellEditor[0] = new TextCellEditor(tViewer.getTree()); tViewer.setCellEditors(cellEditor); tViewer.setCellModifier(new SampleViewCellModifier()); /** * Registering the selection on tViewer to be broadcasted to its listener */ this.getSite().setSelectionProvider(tViewer); /** * Double Click on the Files in our Navigator and open the Default Editor. */ tViewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { if (((IStructuredSelection) tViewer.getSelection()) .getFirstElement() instanceof IFile) { try { IDE.openEditor(Activator.getDefault().getWorkbench() .getActiveWorkbenchWindow().getActivePage(), (IFile) ((IStructuredSelection) tViewer .getSelection()).getFirstElement()); } catch (PartInitException e) { e.printStackTrace(); } } } }); /** Registering as a Listener to changes in Workspace. */ ResourcesPlugin.getWorkspace().addResourceChangeListener(this); } @Override public void setFocus() { } @Override public void resourceChanged(IResourceChangeEvent event) { Runnable run = new Runnable() { public void run() { tViewer.refresh(); } }; Display.getDefault().asyncExec(run); } }

Create below mentioned three java files in samplecode.source.view package and modify these three files with the below mentioned code snippet.

B. samplecode.source.view.SampleContentProvider.java package samplecode.source.view; import java.util.ArrayList; import java.util.Arrays; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.runtime.CoreException; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.Viewer; public class SampleContentProvider implements ITreeContentProvider { @Override public void dispose() { } @Override public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } @Override public Object[] getElements(Object inputElement) { ArrayList<iresource> children = new ArrayList<iresource>(); if (inputElement instanceof IWorkspaceRoot) { children.addAll(Arrays.asList(((IWorkspaceRoot) inputElement) .getProjects())); } return children.toArray(); } @Override public Object[] getChildren(Object parentElement) { ArrayList<iresource> children = new ArrayList<iresource>(); if (parentElement instanceof IContainer) { try { if (((IContainer) parentElement).members().length > 0) { children.addAll(Arrays.asList(((IContainer) parentElement) .members())); } } catch (CoreException e) { e.printStackTrace(); } } return children.toArray(); } @Override public Object getParent(Object element) { return null; } @Override public boolean hasChildren(Object element) { if (element instanceof IContainer) { try { if (((IContainer) element).members().length > 0) { return true; } } catch (CoreException e) { e.printStackTrace(); } } return false; } }

C. samplecode.source.view.SampleLabelProvider.java
package samplecode.source.view; import org.eclipse.core.resources.IResource; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.swt.graphics.Image; public class SampleLabelProvider extends LabelProvider { @Override public Image getImage(Object element) { return super.getImage(element); } @Override public String getText(Object element) { String result = ""; if(element instanceof IResource) { result = ((IResource)element).getName(); } return result; } }

D. samplecode.source.view.SampleViewCellModifier.java
package samplecode.source.view; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.jface.viewers.ICellModifier; import org.eclipse.swt.widgets.TreeItem; public class SampleViewCellModifier implements ICellModifier { @Override public boolean canModify(Object element, String property) { return true; } @Override public Object getValue(Object element, String property) { if (element instanceof IResource) { return ((IResource)element).getName(); } return null; } @Override public void modify(Object element, String property, Object value) { if (((TreeItem) element).getData() instanceof IFile && ((String) value).trim() != "") { IProject project = ((IResource) ((TreeItem) element).getData()) .getProject(); String filePath = ResourcesPlugin.getWorkspace().getRoot() .getLocation().toOSString() + ((IResource) ((TreeItem) element).getData()) .getFullPath(); File javaFile = new File(filePath); IFile file = project.getFile(value.toString()); ResourcesPlugin.getWorkspace().getRoot().getLocation().toOSString(); System.out.println(value); if (!file.exists()) { try { file.create(new FileInputStream(javaFile), true, new NullProgressMonitor()); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (CoreException e) { e.printStackTrace(); } } try { ((IResource) ((TreeItem) element).getData()).delete(true, new NullProgressMonitor()); } catch (CoreException e) { e.printStackTrace(); } } } }

12 .Run the project and if any projects are in workspace, it will be visible in Sample View in Tree structure like below screenshot.

Sample View display workspace project(s)

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