| /******************************************************************************* |
| * Copyright (c) 2000, 2019 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Sebastian Davids - bug 128526, bug 128529 |
| * Lars Vogel <Lars.Vogel@gmail.com> - Bug 440381 |
| * Alexander Fedorov <alexander.fedorov@arsysop.ru> - Bug 548578 |
| *******************************************************************************/ |
| package org.eclipse.e4.ui.workbench.swt.internal.copy; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.eclipse.e4.core.contexts.IEclipseContext; |
| import org.eclipse.e4.ui.dialogs.filteredtree.FilteredTree; |
| import org.eclipse.e4.ui.dialogs.filteredtree.PatternFilter; |
| import org.eclipse.e4.ui.internal.workbench.swt.WorkbenchSWTActivator; |
| import org.eclipse.e4.ui.model.LocalizationHelper; |
| import org.eclipse.e4.ui.model.application.MApplication; |
| import org.eclipse.e4.ui.model.application.descriptor.basic.MPartDescriptor; |
| import org.eclipse.jface.dialogs.Dialog; |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.dialogs.IDialogLabelKeys; |
| import org.eclipse.jface.dialogs.IDialogSettings; |
| import org.eclipse.jface.dialogs.PopupDialog; |
| import org.eclipse.jface.resource.JFaceResources; |
| import org.eclipse.jface.viewers.DoubleClickEvent; |
| import org.eclipse.jface.viewers.IDoubleClickListener; |
| import org.eclipse.jface.viewers.ISelectionChangedListener; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.ITreeSelection; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.FocusAdapter; |
| import org.eclipse.swt.events.FocusEvent; |
| import org.eclipse.swt.events.KeyAdapter; |
| import org.eclipse.swt.events.KeyEvent; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Label; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Text; |
| |
| /** |
| * Based on org.eclipse.ui.internal.dialogs.ShowViewDialog. |
| */ |
| public class ShowViewDialog extends Dialog implements |
| ISelectionChangedListener, IDoubleClickListener { |
| |
| private static final String DIALOG_SETTING_SECTION_NAME = "ShowViewDialog"; //$NON-NLS-1$ |
| |
| private static final int LIST_HEIGHT = 300; |
| |
| private static final int LIST_WIDTH = 250; |
| |
| private static final String STORE_EXPANDED_CATEGORIES_ID = DIALOG_SETTING_SECTION_NAME |
| + ".STORE_EXPANDED_CATEGORIES_ID"; //$NON-NLS-1$ |
| |
| private static final String STORE_SELECTED_VIEW_ID = DIALOG_SETTING_SECTION_NAME |
| + ".STORE_SELECTED_VIEW_ID"; //$NON-NLS-1$ |
| |
| private FilteredTree filteredTree; |
| |
| private Button okButton; |
| |
| private MApplication application; |
| private MPartDescriptor[] viewDescs = new MPartDescriptor[0]; |
| |
| private Label descriptionHint; |
| |
| private IEclipseContext context; |
| |
| /** |
| * Constructs a new ShowViewDialog. |
| * |
| * @param window |
| * the workbench window |
| * @param viewReg |
| * the view registry |
| */ |
| public ShowViewDialog(Shell shell, MApplication application, |
| IEclipseContext context) { |
| super(shell); |
| this.application = application; |
| this.context = context; |
| } |
| |
| /** |
| * This method is called if a button has been pressed. |
| */ |
| @Override |
| protected void buttonPressed(int buttonId) { |
| if (buttonId == IDialogConstants.OK_ID) { |
| saveWidgetValues(); |
| } |
| super.buttonPressed(buttonId); |
| } |
| |
| /** |
| * Notifies that the cancel button of this dialog has been pressed. |
| */ |
| @Override |
| protected void cancelPressed() { |
| viewDescs = new MPartDescriptor[0]; |
| super.cancelPressed(); |
| } |
| |
| @Override |
| protected void configureShell(Shell shell) { |
| super.configureShell(shell); |
| shell.setText(WorkbenchSWTMessages.ShowView_shellTitle); |
| // PlatformUI.getWorkbench().getHelpSystem().setHelp(shell, |
| // IWorkbenchHelpContextIds.SHOW_VIEW_DIALOG); |
| } |
| |
| /** |
| * Adds buttons to this dialog's button bar. |
| * <p> |
| * The default implementation of this framework method adds standard ok and |
| * cancel buttons using the <code>createButton</code> framework method. |
| * Subclasses may override. |
| * </p> |
| * |
| * @param parent |
| * the button bar composite |
| */ |
| @Override |
| protected void createButtonsForButtonBar(Composite parent) { |
| okButton = createButton(parent, IDialogConstants.OK_ID, |
| JFaceResources.getString(IDialogLabelKeys.OK_LABEL_KEY), true); |
| createButton(parent, IDialogConstants.CANCEL_ID, |
| JFaceResources.getString(IDialogLabelKeys.CANCEL_LABEL_KEY), |
| false); |
| updateButtons(); |
| } |
| |
| /** |
| * Creates and returns the contents of the upper part of this dialog (above |
| * the button bar). |
| * |
| * @param parent |
| * the parent composite to contain the dialog area |
| * @return the dialog area control |
| */ |
| @Override |
| protected Control createDialogArea(Composite parent) { |
| // Run super. |
| Composite composite = (Composite) super.createDialogArea(parent); |
| composite.setFont(parent.getFont()); |
| |
| createFilteredTreeViewer(composite); |
| |
| layoutTopControl(filteredTree); |
| |
| // Use F2... label |
| descriptionHint = new Label(composite, SWT.WRAP); |
| descriptionHint.setText(WorkbenchSWTMessages.ShowView_selectViewHelp); |
| descriptionHint.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, |
| false)); |
| descriptionHint.setVisible(false); |
| |
| // Restore the last state |
| restoreWidgetValues(); |
| |
| applyDialogFont(composite); |
| |
| // Return results. |
| return composite; |
| } |
| |
| /** |
| * Create a new filtered tree viewer in the parent. |
| * |
| * @param parent |
| * the parent <code>Composite</code>. |
| */ |
| private void createFilteredTreeViewer(Composite parent) { |
| PatternFilter filter = new ViewPatternFilter(context); |
| filter.setIncludeLeadingWildcard(true); |
| int styleBits = SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER; |
| filteredTree = new FilteredTree(parent, styleBits, filter); |
| filteredTree.setBackground(parent.getDisplay().getSystemColor( |
| SWT.COLOR_WIDGET_BACKGROUND)); |
| |
| TreeViewer treeViewer = filteredTree.getViewer(); |
| |
| treeViewer.setLabelProvider(new ViewLabelProvider(context)); |
| treeViewer.setContentProvider(new ViewContentProvider(application)); |
| treeViewer.setComparator(new ViewComparator()); |
| treeViewer.setInput(application); |
| treeViewer.addSelectionChangedListener(this); |
| treeViewer.addDoubleClickListener(this); |
| treeViewer.getControl().addKeyListener(new KeyAdapter() { |
| @Override |
| public void keyPressed(KeyEvent e) { |
| handleTreeViewerKeyPressed(e); |
| } |
| }); |
| |
| // if the tree has only one or zero views, disable the filter text |
| // control |
| if (hasAtMostOneView(filteredTree.getViewer())) { |
| Text filterText = filteredTree.getFilterControl(); |
| if (filterText != null) { |
| filterText.setEnabled(false); |
| } |
| } |
| } |
| |
| /** |
| * Return whether or not there are less than two views in the list. |
| * |
| * @param tree |
| * @return <code>true</code> if there are less than two views in the list. |
| */ |
| private boolean hasAtMostOneView(TreeViewer tree) { |
| ITreeContentProvider contentProvider = (ITreeContentProvider) tree |
| .getContentProvider(); |
| Object[] children = contentProvider.getElements(tree.getInput()); |
| |
| if (children.length <= 1) { |
| if (children.length == 0) { |
| return true; |
| } |
| return !contentProvider.hasChildren(children[0]); |
| } |
| return false; |
| } |
| |
| @Override |
| public void doubleClick(DoubleClickEvent event) { |
| IStructuredSelection s = (IStructuredSelection) event.getSelection(); |
| Object element = s.getFirstElement(); |
| if (filteredTree.getViewer().isExpandable(element)) { |
| filteredTree.getViewer().setExpandedState(element, |
| !filteredTree.getViewer().getExpandedState(element)); |
| } else if (viewDescs.length > 0) { |
| saveWidgetValues(); |
| setReturnCode(OK); |
| close(); |
| } |
| } |
| |
| /** |
| * Return the dialog store to cache values into |
| */ |
| protected IDialogSettings getDialogSettings() { |
| IDialogSettings workbenchSettings = WorkbenchSWTActivator.getDefault() |
| .getDialogSettings(); |
| IDialogSettings section = workbenchSettings |
| .getSection(DIALOG_SETTING_SECTION_NAME); |
| if (section == null) { |
| section = workbenchSettings |
| .addNewSection(DIALOG_SETTING_SECTION_NAME); |
| } |
| return section; |
| } |
| |
| /** |
| * Returns the descriptors for the selected views. |
| * |
| * @return the descriptors for the selected views |
| */ |
| public MPartDescriptor[] getSelection() { |
| return viewDescs; |
| } |
| |
| /** |
| * Layout the top control. |
| * |
| * @param control |
| * the control. |
| */ |
| private void layoutTopControl(Control control) { |
| GridData spec = new GridData(GridData.FILL_BOTH); |
| spec.widthHint = LIST_WIDTH; |
| spec.heightHint = LIST_HEIGHT; |
| control.setLayoutData(spec); |
| } |
| |
| /** |
| * Use the dialog store to restore widget values to the values that they |
| * held last time this dialog was used to completion. |
| */ |
| protected void restoreWidgetValues() { |
| IDialogSettings settings = getDialogSettings(); |
| |
| String[] expandedCategoryIds = settings |
| .getArray(STORE_EXPANDED_CATEGORIES_ID); |
| if (expandedCategoryIds == null) |
| return; |
| |
| if (expandedCategoryIds.length > 0) |
| filteredTree.getViewer().setExpandedElements((Object[]) expandedCategoryIds); |
| |
| String selectedPartId = settings.get(STORE_SELECTED_VIEW_ID); |
| if (selectedPartId != null) { |
| List<MPartDescriptor> descriptors = application.getDescriptors(); |
| for (MPartDescriptor descriptor : descriptors) { |
| if (selectedPartId.equals(descriptor.getElementId())) { |
| filteredTree.getViewer().setSelection( |
| new StructuredSelection(descriptor), true); |
| break; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Since OK was pressed, write widget values to the dialog store so that |
| * they will persist into the next invocation of this dialog |
| */ |
| protected void saveWidgetValues() { |
| IDialogSettings settings = getDialogSettings(); |
| |
| // Collect the ids of the all expanded categories |
| Object[] expandedElements = filteredTree.getViewer() |
| .getExpandedElements(); |
| String[] expandedCategoryIds = new String[expandedElements.length]; |
| for (int i = 0; i < expandedElements.length; ++i) { |
| if (expandedElements[i] instanceof MPartDescriptor) |
| expandedCategoryIds[i] = ((MPartDescriptor) expandedElements[i]) |
| .getElementId(); |
| else |
| expandedCategoryIds[i] = expandedElements[i].toString(); |
| } |
| |
| // Save them for next time. |
| settings.put(STORE_EXPANDED_CATEGORIES_ID, expandedCategoryIds); |
| |
| String selectedViewId = ""; //$NON-NLS-1$ |
| if (viewDescs.length > 0) { |
| // in the case of a multi-selection, it's probably less confusing |
| // to store just the first rather than the whole multi-selection |
| selectedViewId = viewDescs[0].getElementId(); |
| } |
| settings.put(STORE_SELECTED_VIEW_ID, selectedViewId); |
| } |
| |
| /** |
| * Notifies that the selection has changed. |
| * |
| * @param event |
| * event object describing the change |
| */ |
| @Override |
| public void selectionChanged(SelectionChangedEvent event) { |
| updateSelection(event); |
| updateButtons(); |
| String tooltip = ""; |
| if (viewDescs.length > 0) { |
| tooltip = viewDescs[0].getTooltip(); |
| tooltip = LocalizationHelper.getLocalized(tooltip, viewDescs[0], |
| context); |
| } |
| boolean hasTooltip = (tooltip == null) ? false : tooltip.length() > 0; |
| descriptionHint.setVisible(viewDescs.length == 1 && hasTooltip); |
| } |
| |
| /** |
| * Update the button enablement state. |
| */ |
| protected void updateButtons() { |
| if (okButton != null) { |
| okButton.setEnabled(getSelection().length > 0); |
| } |
| } |
| |
| /** |
| * Update the selection object. |
| */ |
| protected void updateSelection(SelectionChangedEvent event) { |
| ArrayList<MPartDescriptor> descs = new ArrayList<>(); |
| IStructuredSelection sel = event.getStructuredSelection(); |
| for (Object o : sel) { |
| if (o instanceof MPartDescriptor) { |
| descs.add((MPartDescriptor) o); |
| } |
| } |
| |
| viewDescs = new MPartDescriptor[descs.size()]; |
| descs.toArray(viewDescs); |
| } |
| |
| @Override |
| protected IDialogSettings getDialogBoundsSettings() { |
| return getDialogSettings(); |
| } |
| |
| void handleTreeViewerKeyPressed(KeyEvent event) { |
| // popup the description for the selected view |
| if (descriptionHint.isVisible() && event.keyCode == SWT.F2 |
| && event.stateMask == 0) { |
| ITreeSelection selection = filteredTree.getViewer() |
| .getStructuredSelection(); |
| // only show description if one view is selected |
| if (selection.size() == 1) { |
| Object o = selection.getFirstElement(); |
| if (o instanceof MPartDescriptor) { |
| String description = ((MPartDescriptor) o).getTooltip(); |
| description = LocalizationHelper.getLocalized(description, |
| (MPartDescriptor) o, context); |
| if (description != null && description.length() == 0) |
| description = WorkbenchSWTMessages.ShowView_noDesc; |
| popUp(description); |
| } |
| } |
| } |
| } |
| |
| private void popUp(final String description) { |
| new PopupDialog(filteredTree.getShell(), PopupDialog.HOVER_SHELLSTYLE, |
| true, false, false, false, false, null, null) { |
| private static final int CURSOR_SIZE = 15; |
| |
| @Override |
| protected Point getInitialLocation(Point initialSize) { |
| // show popup relative to cursor |
| Display display = getShell().getDisplay(); |
| Point location = display.getCursorLocation(); |
| location.x += CURSOR_SIZE; |
| location.y += CURSOR_SIZE; |
| return location; |
| } |
| |
| @Override |
| protected Control createDialogArea(Composite parent) { |
| Label label = new Label(parent, SWT.WRAP); |
| label.setText(description); |
| label.addFocusListener(new FocusAdapter() { |
| @Override |
| public void focusLost(FocusEvent event) { |
| close(); |
| } |
| }); |
| // Use the compact margins employed by PopupDialog. |
| GridData gd = new GridData(GridData.BEGINNING |
| | GridData.FILL_BOTH); |
| gd.horizontalIndent = PopupDialog.POPUP_HORIZONTALSPACING; |
| gd.verticalIndent = PopupDialog.POPUP_VERTICALSPACING; |
| label.setLayoutData(gd); |
| return label; |
| } |
| }.open(); |
| } |
| |
| @Override |
| protected boolean isResizable() { |
| return true; |
| } |
| } |