Java by API/org.eclipse.jface.viewers/TreeViewer

TreeViewer: getTree()

   <source lang="java">

import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.List; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.LabelProviderChangedEvent; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.window.ApplicationWindow; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass extends ApplicationWindow {

 public MainClass() {
   super(null);
   setBlockOnOpen(true);
   open();
   Display.getCurrent().dispose();
 }
 protected void configureShell(Shell shell) {
   super.configureShell(shell);
   shell.setText("File Tree");
   shell.setSize(400, 400);
 }
 protected Control createContents(Composite parent) {
   Composite composite = new Composite(parent, SWT.NONE);
   composite.setLayout(new GridLayout(1, false));
   Button preserveCase = new Button(composite, SWT.CHECK);
   preserveCase.setText("&Preserve case");
   final TreeViewer tv = new TreeViewer(composite);
   tv.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));
   tv.setContentProvider(new FileTreeContentProvider());
   tv.setLabelProvider(new FileTreeLabelProvider());
   tv.setInput("root");
   preserveCase.addSelectionListener(new SelectionAdapter() {
     public void widgetSelected(SelectionEvent event) {
       boolean preserveCase = ((Button) event.widget).getSelection();
       FileTreeLabelProvider ftlp = (FileTreeLabelProvider) tv.getLabelProvider();
       ftlp.setPreserveCase(preserveCase);
     }
   });
   return composite;
 }
 public static void main(String[] args) {
   new MainClass();
 }

} class FileTreeLabelProvider implements ILabelProvider {

 private List listeners = new ArrayList();
 private Image file;
 private Image dir;
 boolean preserveCase;
 public FileTreeLabelProvider() {
   try {
     file = new Image(null, new FileInputStream("file.gif"));
     dir = new Image(null, new FileInputStream("directory.gif"));
   } catch (FileNotFoundException e) {
   }
 }
 public void setPreserveCase(boolean preserveCase) {
   this.preserveCase = preserveCase;
   LabelProviderChangedEvent event = new LabelProviderChangedEvent(this);
   for (int i = 0, n = listeners.size(); i < n; i++) {
     ILabelProviderListener ilpl = (ILabelProviderListener) listeners.get(i);
     ilpl.labelProviderChanged(event);
   }
 }
 public Image getImage(Object arg0) {
   return ((File) arg0).isDirectory() ? dir : file;
 }
 public String getText(Object arg0) {
   String text = ((File) arg0).getName();
   if (text.length() == 0) {
     text = ((File) arg0).getPath();
   }
   return preserveCase ? text : text.toUpperCase();
 }
 public void addListener(ILabelProviderListener arg0) {
   listeners.add(arg0);
 }
 public void dispose() {
   if (dir != null)
     dir.dispose();
   if (file != null)
     file.dispose();
 }
 public boolean isLabelProperty(Object arg0, String arg1) {
   return false;
 }
 public void removeListener(ILabelProviderListener arg0) {
   listeners.remove(arg0);
 }

} class FileTreeContentProvider implements ITreeContentProvider {

 public Object[] getChildren(Object arg0) {
   return ((File) arg0).listFiles();
 }
 public Object getParent(Object arg0) {
   return ((File) arg0).getParentFile();
 }
 public boolean hasChildren(Object arg0) {
   Object[] obj = getChildren(arg0);
   return obj == null ? false : obj.length > 0;
 }
 public Object[] getElements(Object arg0) {
   return File.listRoots();
 }
 public void dispose() {
 }
 public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
 }

}

      </source>
   
  
 
  

TreeViewer: setContentProvider(IContentProvider arg0)

   <source lang="java">

import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.List; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.LabelProviderChangedEvent; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.window.ApplicationWindow; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass extends ApplicationWindow {

 public MainClass() {
   super(null);
   setBlockOnOpen(true);
   open();
   Display.getCurrent().dispose();
 }
 protected void configureShell(Shell shell) {
   super.configureShell(shell);
   shell.setText("File Tree");
   shell.setSize(400, 400);
 }
 protected Control createContents(Composite parent) {
   Composite composite = new Composite(parent, SWT.NONE);
   composite.setLayout(new GridLayout(1, false));
   Button preserveCase = new Button(composite, SWT.CHECK);
   preserveCase.setText("&Preserve case");
   final TreeViewer tv = new TreeViewer(composite);
   tv.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));
   tv.setContentProvider(new FileTreeContentProvider());
   tv.setLabelProvider(new FileTreeLabelProvider());
   tv.setInput("root");
   preserveCase.addSelectionListener(new SelectionAdapter() {
     public void widgetSelected(SelectionEvent event) {
       boolean preserveCase = ((Button) event.widget).getSelection();
       FileTreeLabelProvider ftlp = (FileTreeLabelProvider) tv.getLabelProvider();
       ftlp.setPreserveCase(preserveCase);
     }
   });
   return composite;
 }
 public static void main(String[] args) {
   new MainClass();
 }

} class FileTreeLabelProvider implements ILabelProvider {

 private List listeners = new ArrayList();
 private Image file;
 private Image dir;
 boolean preserveCase;
 public FileTreeLabelProvider() {
   try {
     file = new Image(null, new FileInputStream("file.gif"));
     dir = new Image(null, new FileInputStream("directory.gif"));
   } catch (FileNotFoundException e) {
   }
 }
 public void setPreserveCase(boolean preserveCase) {
   this.preserveCase = preserveCase;
   LabelProviderChangedEvent event = new LabelProviderChangedEvent(this);
   for (int i = 0, n = listeners.size(); i < n; i++) {
     ILabelProviderListener ilpl = (ILabelProviderListener) listeners.get(i);
     ilpl.labelProviderChanged(event);
   }
 }
 public Image getImage(Object arg0) {
   return ((File) arg0).isDirectory() ? dir : file;
 }
 public String getText(Object arg0) {
   String text = ((File) arg0).getName();
   if (text.length() == 0) {
     text = ((File) arg0).getPath();
   }
   return preserveCase ? text : text.toUpperCase();
 }
 public void addListener(ILabelProviderListener arg0) {
   listeners.add(arg0);
 }
 public void dispose() {
   if (dir != null)
     dir.dispose();
   if (file != null)
     file.dispose();
 }
 public boolean isLabelProperty(Object arg0, String arg1) {
   return false;
 }
 public void removeListener(ILabelProviderListener arg0) {
   listeners.remove(arg0);
 }

} class FileTreeContentProvider implements ITreeContentProvider {

 public Object[] getChildren(Object arg0) {
   return ((File) arg0).listFiles();
 }
 public Object getParent(Object arg0) {
   return ((File) arg0).getParentFile();
 }
 public boolean hasChildren(Object arg0) {
   Object[] obj = getChildren(arg0);
   return obj == null ? false : obj.length > 0;
 }
 public Object[] getElements(Object arg0) {
   return File.listRoots();
 }
 public void dispose() {
 }
 public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
 }

}

      </source>