Java tutorial
/** Copyright 2010 Christian Kstner This file is part of CIDE. CIDE is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 of the License. CIDE is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with CIDE. If not, see <http://www.gnu.org/licenses/>. See http://www.fosd.de/cide/ for further information. */ package de.ovgu.cide.tools.featureview; import java.util.Collections; import org.eclipse.core.resources.IProject; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.IToolBarManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.action.Separator; import org.eclipse.jface.dialogs.IInputValidator; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.layout.FormLayout; import org.eclipse.swt.widgets.ColorDialog; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import org.eclipse.ui.IActionBars; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.IFileEditorInput; import org.eclipse.ui.IPartListener; import org.eclipse.ui.IViewSite; import org.eclipse.ui.IWorkbenchActionConstants; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.PartInitException; import org.eclipse.ui.part.ViewPart; import de.ovgu.cide.ASTColorChangedEvent; import de.ovgu.cide.CIDECorePlugin; import de.ovgu.cide.ColorListChangedEvent; import de.ovgu.cide.ColoredIDEImages; import de.ovgu.cide.FileColorChangedEvent; import de.ovgu.cide.IColorChangeListener; import de.ovgu.cide.features.FeatureModelManager; import de.ovgu.cide.features.FeatureModelNotFoundException; import de.ovgu.cide.features.IFeature; import de.ovgu.cide.features.IFeatureModel; import de.ovgu.cide.features.utils.AbstractToggleProjectionAction; import de.ovgu.cide.features.utils.ToggleAllFeatureVisibility; import de.ovgu.cide.utils.ColorHelper; import de.ovgu.cide.utils.EditorUtility; /** * list of all features. can be used to manipulate features and to control views * (projection) * * @author ckaestne * */ public class FeatureView extends ViewPart { private class ActiveProjectListner implements IPartListener { public void partActivated(IWorkbenchPart part) { update(); } private void update() { IProject ap = getActiveProject(); setProject(ap); } public void partBroughtToTop(IWorkbenchPart part) { update(); } public void partClosed(IWorkbenchPart part) { update(); } public void partDeactivated(IWorkbenchPart part) { update(); } public void partOpened(IWorkbenchPart part) { update(); } } private class ColorChangeListner implements IColorChangeListener { public void astColorChanged(ASTColorChangedEvent event) { // ignore } public void colorListChanged(ColorListChangedEvent event) { if (event.getProject() == project) Display.getDefault().asyncExec(new Runnable() { public void run() { redraw(); updateValidPanel(); } }); } public void fileColorChanged(FileColorChangedEvent event) { // ignore } } private ActiveProjectListner activeProjectListner; private ColorChangeListner colorChangeListner; public FeatureView() { } @Override public void init(IViewSite site) throws PartInitException { super.init(site); activeProjectListner = new ActiveProjectListner(); site.getPage().addPartListener(activeProjectListner); colorChangeListner = new ColorChangeListner(); CIDECorePlugin.getDefault().addColorChangeListener(colorChangeListner); } public static final String VIEW_ID = "de.ovgu.cide.core.view.features"; private Action filterAction; private Action selectAllAction; private Action selectNoneAction; private Action renameAction; private Action selectColorAction; private Action findFeatureCodeAction; // private FeatureTableContentAndLabelProvider provider; private Table table; private Label validPanel; /** * This is a callback that will allow us to create the viewer and initialize * it. */ public void createPartControl(Composite parent) { createTable(parent); createValidPanel(parent); createLayout(parent); makeActions(); hookContextMenu(); hookDoubleClickAction(); contributeToActionBars(); } private void createLayout(Composite parent) { FormData formData = new FormData(-1, 16); formData.height = 16; formData.right = new FormAttachment(100, 0); formData.left = new FormAttachment(0, 0); formData.bottom = new FormAttachment(100, 0); FormData tableLayoutData = new FormData(-1, -1); tableLayoutData.top = new FormAttachment(0, 0); tableLayoutData.right = new FormAttachment(100, 0); tableLayoutData.left = new FormAttachment(0, 0); tableLayoutData.bottom = new FormAttachment(validPanel); table.setLayoutData(tableLayoutData); validPanel.setLayoutData(formData); parent.setLayout(new FormLayout()); parent.pack(); } private void createValidPanel(Composite parent) { validPanel = new Label(parent, SWT.NONE); validPanel.setText(""); } private void createTable(Composite parent) { table = new Table(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.CHECK); table.setHeaderVisible(false); TableColumn column; column = new TableColumn(table, SWT.LEFT); column.setText("Name"); column.setWidth(120); column = new TableColumn(table, SWT.LEFT); column.setText("Color"); column.setWidth(60); table.addControlListener(new ControlListener() { public void controlMoved(ControlEvent e) { } public void controlResized(ControlEvent e) { int width = table.getClientArea().width; if (width > 120) { table.getColumn(0).setWidth(width - 60); table.getColumn(1).setWidth(60); } else { table.getColumn(0).setWidth(width / 2); table.getColumn(1).setWidth(width / 2); } } }); setProject(getActiveProject()); table.addSelectionListener(new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { } public void widgetSelected(SelectionEvent e) { if (project != null && e.detail == SWT.CHECK) { TableItem item = (TableItem) e.item; IFeature feature = (IFeature) item.getData(); if (item.getGrayed()) item.setChecked(feature.isVisible()); else try { feature.setVisible(item.getChecked()); updateValidPanel(); } catch (UnsupportedOperationException ex) { item.setChecked(feature.isVisible()); } } } }); } protected void updateValidPanel() { if (featureModel.isValidSelection(featureModel.getVisibleFeatures())) { validPanel.setText("Valid configuration"); } else validPanel.setText(""); } private IProject project; private IFeatureModel featureModel; private MenuManager featureContextMenuMgr; private void setProject(IProject newProject) { if (project == newProject) return; project = newProject; if (project != null) try { featureModel = FeatureModelManager.getInstance().getFeatureModel(project); } catch (FeatureModelNotFoundException e) { project = null; featureModel = null; } else featureModel = null; redraw(); } private void redraw() { if (table.isDisposed()) return; try { table.setRedraw(false); IFeature oldSelection = getSelectedFeature(); for (TableItem item : table.getItems()) { if (item.getBackground(1) != null) item.getBackground(1).dispose(); } table.removeAll(); if (project != null && featureModel != null) { boolean isFiltered = (filterAction != null) && filterAction.isChecked(); for (IFeature feature : ColorHelper.sortFeatures(featureModel.getFeatures())) if (!isFiltered || feature.isVisible()) { TableItem item = new TableItem(table, SWT.DEFAULT); item.setText(0, feature.getName()); item.setText(1, ColorHelper.rgb2str(feature.getRGB())); item.setBackground(1, new Color(Display.getCurrent(), ColorHelper.getCombinedRGB(Collections.singleton(feature)))); item.setChecked(feature.isVisible()); item.setGrayed(!feature.canSetVisible()); item.setData(feature); } setSelectedFeature(oldSelection); } } finally { table.setRedraw(true); } } private void setSelectedFeature(IFeature feature) { if (feature != null) for (TableItem item : table.getItems()) { if (item.getData() == feature) { table.setSelection(item); break; } } table.setSelection(-1); } private void hookContextMenu() { featureContextMenuMgr = new MenuManager("#PopupMenu"); featureContextMenuMgr.setRemoveAllWhenShown(true); featureContextMenuMgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { FeatureView.this.fillContextMenu(manager); } }); Menu menu = featureContextMenuMgr.createContextMenu(table); table.setMenu(menu); // getSite().registerContextMenu(menuMgr, table.get); } private void contributeToActionBars() { IActionBars bars = getViewSite().getActionBars(); fillLocalToolBar(bars.getToolBarManager()); fillMenuBar(bars.getMenuManager()); } private void fillContextMenu(IMenuManager manager) { boolean enabled = getSelectedFeature() != null; renameAction.setEnabled(enabled && getSelectedFeature().canSetName()); selectColorAction.setEnabled(enabled && getSelectedFeature().canSetRGB()); findFeatureCodeAction.setEnabled(enabled); manager.add(renameAction); manager.add(selectColorAction); manager.add(findFeatureCodeAction); // Other plug-ins can contribute there actions here manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS)); } private void fillLocalToolBar(IToolBarManager manager) { manager.add(filterAction); manager.add(selectAllAction); manager.add(selectNoneAction); } private void fillMenuBar(IMenuManager manager) { for (Action a : ProjectionKindManager.getInstance().getActions()) manager.add(a); } private void makeActions() { filterAction = new AbstractToggleProjectionAction() { public void run() { redraw(); } }; selectAllAction = new ToggleAllFeatureVisibility(featureModel, true) { @Override public void run() { for (IFeature feature : featureModel.getFeatures()) { feature.setVisible(visible); } updateValidPanel(); } }; ColoredIDEImages.setImageDescriptors(selectAllAction, ColoredIDEImages.CHECKED_IMAGE); selectNoneAction = new ToggleAllFeatureVisibility(featureModel, false) { @Override public void run() { for (IFeature feature : featureModel.getFeatures()) { feature.setVisible(visible); } updateValidPanel(); } }; ColoredIDEImages.setImageDescriptors(selectNoneAction, ColoredIDEImages.UNCHECKED_IMAGE); renameAction = new Action("Rename...") { public void run() { IFeature feature = getSelectedFeature(); if (feature == null) return; String oldName = feature.getName(); InputDialog input = new InputDialog(getSite().getShell(), "Rename IFeature", "New name:", oldName, new IInputValidator() { public String isValid(String newText) { if (newText.length() == 0) return "Name must not be empty"; return null; } }); if (input.open() == InputDialog.OK) try { feature.setName(input.getValue()); } catch (UnsupportedOperationException e) { // nothing yet. TODO prevent renaming features that // cannot // be renamed } } }; renameAction.setToolTipText("Rename IFeature"); renameAction.setAccelerator(SWT.F2); selectColorAction = new Action("Select color...") { @Override public void run() { IFeature feature = getSelectedFeature(); if (feature == null) return; RGB oldColor = feature.getRGB(); ColorDialog colorDialog = new ColorDialog(getSite().getShell()); colorDialog.setRGB(oldColor); colorDialog.setText("Color for IFeature \"" + feature.getName() + "\""); RGB newColor = colorDialog.open(); if (newColor != null && newColor != oldColor) try { feature.setRGB(newColor); } catch (UnsupportedOperationException e) { // nothing yet. TODO prevent renaming features that // cannot be renamed } } }; findFeatureCodeAction = new Action("Find feature's code") { @Override public void run() { MessageDialog.openWarning(getSite().getShell(), "Error", "not implemented yet"); super.run(); } }; } protected void selectAll(boolean visible) { for (IFeature feature : featureModel.getFeatures()) { feature.setVisible(visible); } updateValidPanel(); } protected IFeature getSelectedFeature() { int idx = table.getSelectionIndex(); if (idx == -1) return null; return (IFeature) table.getItem(idx).getData(); } private void hookDoubleClickAction() { // tree.addSelectionListener(new SelectionListener() { // public void widgetDefaultSelected(SelectionEvent e) { // } // // public void widgetSelected(SelectionEvent e) { // jumpToAction.run(); // } // }); } // private void showMessage(String message) { // MessageDialog.openInformation(tree.getShell(), "Feature Interactions", // message); // } /** * Passing the focus request to the viewer's control. */ public void setFocus() { table.setFocus(); } private IProject getActiveProject() { IEditorPart part = EditorUtility.getActiveEditor(); if (part != null) { IEditorInput input = part.getEditorInput(); if (input instanceof IFileEditorInput) return ((IFileEditorInput) input).getFile().getProject(); } return null; } @Override public void dispose() { setProject(null); if (activeProjectListner != null) getSite().getPage().removePartListener(activeProjectListner); if (colorChangeListner != null) CIDECorePlugin.getDefault().removeColorChangeListener(colorChangeListner); } }