Java tutorial
/******************************************************************************* * Copyright (c) 2015 MINRES Technologies GmbH and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * MINRES Technologies GmbH - initial API and implementation *******************************************************************************/ package com.minres.scviewer.ui.views.sections; import java.util.Collection; import java.util.HashMap; import java.util.TreeMap; import org.eclipse.core.runtime.Assert; import org.eclipse.core.runtime.ListenerList; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.ISelectionProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeColumn; import org.eclipse.ui.IEditorReference; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.views.properties.tabbed.AbstractPropertySection; import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage; import com.minres.scviewer.database.ITx; import com.minres.scviewer.database.ITxRelation; public class RelatedProperty extends AbstractPropertySection implements ISelectionProvider, ISelectionChangedListener { private final String[] titles = { "Relation type", "Relation Name", "Tx Id" }; private ListenerList listeners = new ListenerList(); private ITx iTr; private ISelection currentSelection; private TreeViewer treeViewer; public RelatedProperty() { } public void createControls(Composite parent, TabbedPropertySheetPage aTabbedPropertySheetPage) { super.createControls(parent, aTabbedPropertySheetPage); Composite composite = getWidgetFactory().createFlatFormComposite(parent); Tree tree = new Tree(composite, SWT.BORDER | SWT.FULL_SELECTION); tree.setHeaderVisible(true); treeViewer = new TreeViewer(tree); TreeColumn column1 = new TreeColumn(tree, SWT.LEFT); tree.setLinesVisible(true); column1.setAlignment(SWT.LEFT); column1.setText(titles[0]); column1.setWidth(150); TreeColumn column2 = new TreeColumn(tree, SWT.LEFT); column2.setAlignment(SWT.LEFT); column2.setText(titles[1]); column2.setWidth(150); TreeColumn column3 = new TreeColumn(tree, SWT.RIGHT); column3.setAlignment(SWT.LEFT); column3.setText(titles[2]); column3.setWidth(150); Object layoutData = parent.getLayoutData(); if (layoutData instanceof GridData) { GridData gridData = (GridData) layoutData; gridData.grabExcessVerticalSpace = true; gridData.verticalAlignment = SWT.FILL; } FormData formData = new FormData(); formData.left = new FormAttachment(0); formData.top = new FormAttachment(0); formData.right = new FormAttachment(100); formData.bottom = new FormAttachment(100); tree.setLayoutData(formData); treeViewer.setAutoExpandLevel(2); treeViewer.setContentProvider(new ITreeContentProvider() { TreeMap<String, Collection<ITxRelation>> hier = new TreeMap<String, Collection<ITxRelation>>(); HashMap<ITxRelation, String> parents = new HashMap<ITxRelation, String>(); @Override public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { if (newInput instanceof ITx) { hier.clear(); parents.clear(); String relName = "incoming"; Collection<ITxRelation> relSet = ((ITx) newInput).getIncomingRelations(); if (relSet != null && relSet.size() > 0) { hier.put(relName, relSet); for (ITxRelation rel : relSet) parents.put(rel, relName); } relName = "outgoing"; relSet = ((ITx) newInput).getOutgoingRelations(); if (relSet != null && relSet.size() > 0) { hier.put(relName, relSet); for (ITxRelation rel : relSet) parents.put(rel, relName); } } } @Override public void dispose() { } @Override public boolean hasChildren(Object element) { Object[] childs = getChildren(element); return childs != null && childs.length > 0; } @Override public Object getParent(Object element) { if (element instanceof ITx) return parents.get(element); else return null; } @Override public Object[] getElements(Object inputElement) { return hier.keySet().toArray(); } @Override public Object[] getChildren(Object parentElement) { if (parentElement instanceof String) return hier.get((String) parentElement).toArray(); else return null; } }); treeViewer.setLabelProvider(new ITableLabelProvider() { @Override public void removeListener(ILabelProviderListener listener) { } @Override public boolean isLabelProperty(Object element, String property) { return false; } @Override public void dispose() { } @Override public void addListener(ILabelProviderListener listener) { } @Override public String getColumnText(Object element, int columnIndex) { if (columnIndex == 0 && element instanceof String) return element.toString(); else if (columnIndex == 1 && element instanceof ITxRelation) return ((ITxRelation) element).getRelationType().getName(); else if (columnIndex == 2 && element instanceof ITxRelation) { ITxRelation rel = (ITxRelation) element; if (rel.getTarget() == iTr) return ((ITxRelation) element).getSource().getId().toString(); else return ((ITxRelation) element).getTarget().getId().toString(); } else return null; } @Override public Image getColumnImage(Object element, int columnIndex) { return null; } }); treeViewer.addSelectionChangedListener(this); MenuManager menuMgr = new MenuManager("#PopUp"); //$NON-NLS-1$ menuMgr.setRemoveAllWhenShown(true); menuMgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager mgr) { ISelection selection = treeViewer.getSelection(); if (selection instanceof IStructuredSelection) { Object obj = ((IStructuredSelection) selection).getFirstElement(); mgr.add(makeTransactionAction(obj, iTr)); } } }); Menu menu = menuMgr.createContextMenu(treeViewer.getControl()); treeViewer.getControl().setMenu(menu); // aTabbedPropertySheetPage.getSite().setSelectionProvider(this); // if(getPart()!=null){ // getPart().getSite().setSelectionProvider(this); // } } private Action makeTransactionAction(final Object obj, final ITx transaction) { Action action = new Action() { public void run() { if (obj instanceof ITxRelation) { IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(); ITx targetTransaction = ((ITxRelation) obj).getSource() == transaction ? ((ITxRelation) obj).getTarget() : ((ITxRelation) obj).getSource(); for (IEditorReference editorRef : page.getEditorReferences()) { IWorkbenchPart part = editorRef.getPart(false); if (editorRef.getPage().isPartVisible(part)) { part.getSite().getSelectionProvider() .setSelection(new StructuredSelection(targetTransaction)); part.setFocus(); } } } } }; action.setText("Jump to Transaction"); action.setImageDescriptor( PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_OBJ_ADD)); action.setEnabled(true); return action; } public void setInput(IWorkbenchPart part, ISelection selection) { super.setInput(part, selection); currentSelection = null; Assert.isTrue(selection instanceof IStructuredSelection); Object input = ((IStructuredSelection) selection).getFirstElement(); Assert.isTrue(input instanceof ITx); iTr = (ITx) input; } public void refresh() { treeViewer.setInput(iTr); } public void aboutToBeShown() { treeViewer.expandAll(); } @Override public void addSelectionChangedListener(ISelectionChangedListener listener) { listeners.add(listener); } @Override public void removeSelectionChangedListener(ISelectionChangedListener listener) { listeners.remove(listener); } public ISelection getSelection() { return currentSelection != null ? currentSelection : super.getSelection(); } @Override public void setSelection(ISelection selection) { currentSelection = selection; Object[] list = listeners.getListeners(); for (int i = 0; i < list.length; i++) { ((ISelectionChangedListener) list[i]).selectionChanged(new SelectionChangedEvent(this, selection)); } } @Override public void selectionChanged(SelectionChangedEvent event) { // ISelection selection = event.getSelection(); // if(selection instanceof IStructuredSelection){ // IStructuredSelection treeSelection =(IStructuredSelection)selection; // Object elem = treeSelection.getFirstElement(); // if(elem instanceof ITransaction){ // currentSelection = new StructuredSelection(elem); // } // } } }