Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2005 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.team.internal.ui.dialogs; import org.eclipse.core.resources.mapping.ResourceMapping; import org.eclipse.jface.viewers.*; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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.Table; import org.eclipse.team.internal.ui.TeamUIMessages; import org.eclipse.team.internal.ui.mapping.ResourceMappingLabelProvider; import org.eclipse.ui.model.AdaptableList; import org.eclipse.ui.model.BaseWorkbenchContentProvider; /** * Dialog area that displays a checkbox list of mappings. */ public class ResourceMappingSelectionArea extends DialogArea { /** * Property constant used to indicate that the selected mapping has changed. * The object associated with the property is a <code>ResourceMapping</code>. */ public static final String SELECTED_MAPPING = "SelectedMapping"; //$NON-NLS-1$ /** * Property constant used to indicate that the checked mappings have changed. * The object associated with the property is a <code>ResourceMapping[]</code> * (i.e. an array of mappings). */ public static final String CHECKED_MAPPINGS = "CheckedMappings"; //$NON-NLS-1$ private ResourceMapping[] mappings; private TableViewer viewer; private ResourceMapping[] checkedMappings; private ResourceMapping selectedMapping; private String description; private boolean supportsChecking; private boolean supportsSelection; public ResourceMappingSelectionArea(ResourceMapping[] mappings, boolean supportSelection, boolean supportChecking) { this.mappings = mappings; this.supportsChecking = supportChecking; this.supportsSelection = supportSelection; } /* (non-Javadoc) * @see org.eclipse.team.internal.ui.dialogs.DialogArea#createArea(org.eclipse.swt.widgets.Composite) */ public void createArea(Composite parent) { Composite composite = createComposite(parent, 1, true); GridLayout layout = new GridLayout(1, false); layout.marginHeight = 0; layout.marginWidth = 0; layout.verticalSpacing = 0; layout.horizontalSpacing = 0; composite.setLayout(layout); if (description != null) createWrappingLabel(composite, description, 1); createViewer(composite); GridData data = new GridData(GridData.FILL_BOTH); data.heightHint = 100; data.widthHint = 300; viewer.getControl().setLayoutData(data); viewer.setContentProvider(new BaseWorkbenchContentProvider()); viewer.setLabelProvider(new ResourceMappingLabelProvider()); viewer.setInput(new AdaptableList(mappings)); if (isSupportsSelection()) { viewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { ResourceMapping oldSelection = selectedMapping; selectedMapping = internalGetSelectedMapping(); if (oldSelection != selectedMapping) firePropertyChangeChange(SELECTED_MAPPING, oldSelection, selectedMapping); } }); } if (isSupportsChecking()) initializeCheckboxViewer(composite); } private void initializeCheckboxViewer(Composite composite) { final CheckboxTableViewer checkboxViewer = getCheckboxTableViewer(); checkboxViewer.addCheckStateListener(new ICheckStateListener() { public void checkStateChanged(CheckStateChangedEvent event) { ResourceMapping[] oldMappings = checkedMappings; checkedMappings = internalGetCheckedMappings(); if (oldMappings != checkedMappings) firePropertyChangeChange(CHECKED_MAPPINGS, oldMappings, checkedMappings); } }); checkboxViewer.setCheckedElements(mappings); checkedMappings = mappings; Composite buttons = createEmbeddedButtonComposite(composite); Button selectAll = new Button(buttons, SWT.PUSH); selectAll.setText(TeamUIMessages.ResourceMappingSelectionArea_0); selectAll.setLayoutData(new GridData(GridData.FILL_BOTH)); selectAll.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { checkboxViewer.setAllChecked(true); } }); Button deselectAll = new Button(buttons, SWT.PUSH); deselectAll.setText(TeamUIMessages.ResourceMappingSelectionArea_1); deselectAll.setLayoutData(new GridData(GridData.FILL_BOTH)); deselectAll.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { checkboxViewer.setAllChecked(false); } }); } private void createViewer(Composite composite) { if (isSupportsChecking()) viewer = CheckboxTableViewer.newCheckList(composite, getViewerStyle()); else viewer = new TableViewer(new Table(composite, getViewerStyle())); } private int getViewerStyle() { int style = SWT.BORDER; if (isSupportsSelection()) style |= SWT.SINGLE; return style; } /* private */ ResourceMapping[] internalGetCheckedMappings() { Object[] checked = getCheckboxTableViewer().getCheckedElements(); ResourceMapping[] mappings = new ResourceMapping[checked.length]; for (int i = 0; i < checked.length; i++) { Object object = checked[i]; mappings[i] = (ResourceMapping) object; } return mappings; } private Composite createEmbeddedButtonComposite(Composite composite) { GridData data; Composite buttons = new Composite(composite, SWT.NONE); GridLayout layout = new GridLayout(); layout.numColumns = 2; // this is incremented by createButton layout.makeColumnsEqualWidth = true; layout.marginWidth = 0; buttons.setLayout(layout); data = new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.VERTICAL_ALIGN_CENTER); buttons.setLayoutData(data); return buttons; } /* private */ ResourceMapping internalGetSelectedMapping() { ISelection selection = viewer.getSelection(); if (selection instanceof IStructuredSelection) { IStructuredSelection ss = (IStructuredSelection) selection; Object firstElement = ss.getFirstElement(); if (firstElement instanceof ResourceMapping) return (ResourceMapping) firstElement; } return null; } public void setDescription(String description) { this.description = description; } public ResourceMapping[] getCheckedMappings() { return checkedMappings; } public ResourceMapping getSelectedMapping() { return selectedMapping; } private CheckboxTableViewer getCheckboxTableViewer() { return (CheckboxTableViewer) viewer; } public boolean isSupportsChecking() { return supportsChecking; } public boolean isSupportsSelection() { return supportsSelection; } }