| /******************************************************************************* |
| * Copyright (c) 2004, 2018 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.help.ui.internal.views; |
| |
| import java.util.ArrayList; |
| |
| import org.eclipse.help.ui.internal.Messages; |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.preference.IPreferenceNode; |
| import org.eclipse.jface.preference.PreferenceDialog; |
| import org.eclipse.jface.preference.PreferenceManager; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.wizard.WizardDialog; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Shell; |
| |
| public class ScopePreferenceDialog extends PreferenceDialog { |
| private EngineDescriptorManager descManager; |
| private ArrayList<PendingOperation> pendingOperations; |
| |
| class PendingOperation { |
| int action; |
| EngineDescriptor desc; |
| public PendingOperation(int action, EngineDescriptor desc) { |
| this.action = action; |
| this.desc = desc; |
| } |
| } |
| /** |
| * The Add button id. |
| */ |
| private final static int NEW_ID = IDialogConstants.CLIENT_ID + 1; |
| |
| /** |
| * The Remove button id. |
| */ |
| private final static int DELETE_ID = IDialogConstants.CLIENT_ID + 2; |
| |
| public ScopePreferenceDialog(Shell parentShell, PreferenceManager manager, EngineDescriptorManager descManager, boolean editable) { |
| super(parentShell, manager); |
| this.descManager = descManager; |
| } |
| |
| @Override |
| protected Control createTreeAreaContents(Composite parent) { |
| GridLayout layout = new GridLayout(); |
| layout.marginWidth = layout.marginHeight = 0; |
| Composite container = new Composite(parent, SWT.NULL); |
| container.setLayout(layout); |
| Control treeControl = super.createTreeAreaContents(container); |
| GridData treeGd = (GridData)treeControl.getLayoutData(); |
| GridData gd = new GridData(GridData.FILL_BOTH); |
| gd.horizontalSpan = 2; |
| treeControl.setLayoutData(gd); |
| |
| Button lbutton = createButton(container, NEW_ID, Messages.ScopePreferenceDialog_new, false); |
| gd = (GridData)lbutton.getLayoutData(); |
| gd.horizontalAlignment = GridData.HORIZONTAL_ALIGN_BEGINNING; |
| Button rbutton = createButton(container, DELETE_ID, Messages.ScopePreferenceDialog_delete, false); |
| rbutton.setEnabled(false); |
| gd = (GridData)rbutton.getLayoutData(); |
| gd.horizontalAlignment = GridData.HORIZONTAL_ALIGN_BEGINNING; |
| layout.numColumns = 2; |
| container.setLayoutData(treeGd); |
| Point size = container.computeSize(SWT.DEFAULT, SWT.DEFAULT, true); |
| treeGd.widthHint = Math.max(treeGd.widthHint, size.x); |
| return container; |
| } |
| |
| @Override |
| protected TreeViewer createTreeViewer(Composite parent) { |
| TreeViewer viewer = super.createTreeViewer(parent); |
| viewer.addSelectionChangedListener(event -> { |
| IStructuredSelection ssel = event.getStructuredSelection(); |
| Object obj = ssel.getFirstElement(); |
| treeSelectionChanged(obj); |
| }); |
| return viewer; |
| } |
| |
| @Override |
| protected void buttonPressed(int buttonId) { |
| switch (buttonId) { |
| case NEW_ID: |
| doNew(); |
| break; |
| case DELETE_ID: |
| doDelete(); |
| break; |
| default: |
| super.buttonPressed(buttonId); |
| } |
| } |
| |
| private void treeSelectionChanged(Object obj) { |
| boolean removable = false; |
| if (obj instanceof ScopePreferenceManager.EnginePreferenceNode) { |
| ScopePreferenceManager.EnginePreferenceNode node = (ScopePreferenceManager.EnginePreferenceNode)obj; |
| EngineDescriptor desc = node.getDescriptor(); |
| removable = desc.isUserDefined(); |
| } |
| getButton(DELETE_ID).setEnabled(removable); |
| } |
| |
| private void doNew() { |
| NewEngineWizard wizard = new NewEngineWizard(descManager.getEngineTypes()); |
| WizardDialog dialog = new WizardDialog(getShell(), wizard); |
| dialog.create(); |
| dialog.getShell().setSize(400, 500); |
| if (dialog.open()==WizardDialog.OK) { |
| EngineTypeDescriptor etdesc = wizard.getSelectedEngineType(); |
| EngineDescriptor desc = new EngineDescriptor(descManager); |
| desc.setEngineType(etdesc); |
| desc.setUserDefined(true); |
| desc.setId(descManager.computeNewId(etdesc.getId())); |
| ScopePreferenceManager mng = (ScopePreferenceManager)getPreferenceManager(); |
| IPreferenceNode node = mng.addNode(desc); |
| getTreeViewer().refresh(); |
| getTreeViewer().setSelection(new StructuredSelection(node)); |
| scheduleOperation(NEW_ID, desc); |
| } |
| } |
| |
| private void doDelete() { |
| Object obj = getTreeViewer().getStructuredSelection().getFirstElement(); |
| if (obj instanceof ScopePreferenceManager.EnginePreferenceNode) { |
| ScopePreferenceManager.EnginePreferenceNode node = (ScopePreferenceManager.EnginePreferenceNode)obj; |
| EngineDescriptor desc = node.getDescriptor(); |
| //ScopePreferenceManager mng = (ScopePreferenceManager)getPreferenceManager(); |
| getTreeViewer().remove(node); |
| scheduleOperation(DELETE_ID, desc); |
| } |
| } |
| |
| private void scheduleOperation(int action, EngineDescriptor desc) { |
| if (pendingOperations==null) |
| pendingOperations = new ArrayList<>(); |
| pendingOperations.add(new PendingOperation(action, desc)); |
| } |
| |
| @Override |
| protected void okPressed() { |
| super.okPressed(); |
| if (pendingOperations!=null) { |
| // process pending operations |
| for (int i=0; i<pendingOperations.size(); i++) { |
| PendingOperation op = pendingOperations.get(i); |
| if (op.action==NEW_ID) |
| descManager.add(op.desc); |
| else |
| descManager.remove(op.desc); |
| } |
| pendingOperations = null; |
| } |
| descManager.save(); |
| } |
| } |