Attachment 4874 Details for Bug 36888 – code example

code example

example.txt (text/plain), 3.70 KB, created by Martin Aeschlimann

on 2003-05-14 12:16:33 EDT

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Filename:

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Creator: Martin Aeschlimann

Created: 2003-05-14 12:16:33 EDT

Size: 3.70 KB

patch

obsolete

>// action example
>
>public class ExampleAddConstructorsAction extends Action implements ISelectionChangedListener {
>
>	private IType fSelectedType;
>
>	public ExampleAddConstructorsAction() {
>		// set the label, tooltip ect
>	}
>
>	public void selectionChanged(final SelectionChangedEvent event) {
>		Runnable runnable= new Runnable() {
>			public void run() {
>				internalSelectionChanged(event);
>			}
>		};
>		JDTCompilationUnitOwner.getDefault().run(runnable);
>	}
>	
>
>	private void internalSelectionChanged(SelectionChangedEvent event) {
>		fSelectedType= null;
>		boolean isEnabled= false;
>		
>		ISelection selection= event.getSelection();
>		if (selection instanceof IStructuredSelection) {
>			Object first= ((IStructuredSelection) selection).getFirstElement();
>			try {
>				if (first instanceof ICompilationUnit) {
>					ICompilationUnit cu= (ICompilationUnit) first;
>					IType[] types= cu.getTypes();
>					isEnabled= types.length > 0 && !types[0].isInterface();
>					fSelectedType= types[0];
>				} else if (first instanceof IType) {
>					isEnabled= ((IType) first).isInterface();
>					fSelectedType= ((IType) first);
>				}
>			} catch (JavaModelException e) {
>				// ignore
>			}
>		}
>		setEnabled(isEnabled);
>	}
>	
>	protected void run(final IStructuredSelection selection) {
>		if (fSelectedType != null) {
>			Runnable runnable= new Runnable() {
>				public void run() {
>					internalRun(selection);
>				}
>			};
>			JDTCompilationUnitOwner.getDefault().run(runnable);			
>		}
>	}
>	
>	private void internalRun(IStructuredSelection selection) {
>		// perform the action	
>	}
>}
>
>// content provider example
>
>public class ExampleContentProvider implements ITreeContentProvider {
>
>	public Object[] getChildren(Object parentElement) {
>		if (parentElement instanceof IParent) {
>			final IParent elem= (IParent) parentElement;
>			final Object[][] res= new Object[][] {null };
>			
>			Runnable runnable= new Runnable() {
>				public void run() {
>					try {
>						res[0]= elem.getChildren();
>					} catch (JavaModelException e) {
>						JavaPlugin.log(e);
>					}
>				}
>			};
>			
>			JDTCompilationUnitOwner.getDefault().run(runnable);
>			return res[0];
>		}
>		return new Object[0];
>	}
>
>	public Object getParent(Object element) {
>		if (element instanceof IJavaElement) {
>			final IJavaElement elem= (IJavaElement) element;
>			final Object[] res= new Object[] {null };
>			
>			Runnable runnable= new Runnable() {
>				public void run() {
>					res[0]= elem.getParent();
>				}
>			};
>			
>			JDTCompilationUnitOwner.getDefault().run(runnable);
>			return res[0];
>		}
>		return null;
>	}
>
>	public boolean hasChildren(Object element) {
>		if (element instanceof IParent) {
>			final IParent elem= (IParent) element;
>			final boolean[] res= new boolean[] {false };
>			
>			Runnable runnable= new Runnable() {
>				public void run() {
>					try {
>						res[0]= elem.hasChildren();
>					} catch (JavaModelException e) {
>						JavaPlugin.log(e);
>					}
>				}
>			};
>			
>			JDTCompilationUnitOwner.getDefault().run(runnable);
>			return res[0];
>		}
>		return false;
>	}
>
>	public Object[] getElements(Object parentElement) {
>		return getChildren(parentElement);
>	}
>
>	public void dispose() {
>	}
>
>	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
>	}
>}
>
>//the JDT CompilationUnitOwner: The world as seen by JDT and the Java editor
>public class JDTCompilationUnitOwner /*extends CompilationUnitOwner*/ {
>	
>	private static JDTCompilationUnitOwner fgDefault= new JDTCompilationUnitOwner();
>	
>	public static JDTCompilationUnitOwner getDefault() {
>		return fgDefault; // the JDT CompilationUnitOwner
>	}
>	
>	// defined by CompilationUnitOwner
>	public void run(Runnable runnable) {
>	}
>}

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Attachments on bug 36888: 4874