Java tutorial
/******************************************************************************* * Copyright 2013 Geoscience Australia * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package au.gov.ga.earthsci.bookmark.ui.editor; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import java.util.TreeMap; import java.util.TreeSet; import java.util.concurrent.ConcurrentHashMap; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.CellLabelProvider; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.EditingSupport; import org.eclipse.jface.viewers.ICellEditorValidator; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerCell; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Table; import au.gov.ga.earthsci.bookmark.BookmarkPropertyFactory; import au.gov.ga.earthsci.bookmark.model.IBookmarkProperty; import au.gov.ga.earthsci.bookmark.properties.layer.LayersProperty; import au.gov.ga.earthsci.bookmark.properties.layer.LayersPropertyPersister; import au.gov.ga.earthsci.worldwind.common.util.Util; /** * An {@link IBookmarkPropertyEditor} used for editing {@link IBookmarkProperty} * instances. * * @author James Navin (james.navin@ga.gov.au) */ public class LayersPropertyEditor extends AbstractBookmarkPropertyEditor { private Composite container; private CheckboxTableViewer layerTable; private Map<String, Map<String, String>> layerState; private List<TableViewerColumn> tableColumns; private Map<Integer, String> colToName; private CellLabelProvider labelProv; @Override public String getName() { return Messages.LayersPropertyEditor_EditorName; } @Override public String getDescription() { return Messages.LayersPropertyEditor_EditorDescription; } @Override public void okPressed() { if (layerState == null) { return; } Map<String, Map<String, String>> filtered = new HashMap<String, Map<String, String>>(); for (Entry<String, Map<String, String>> entry : layerState.entrySet()) { if (layerTable.getChecked(entry)) { filtered.put(entry.getKey(), entry.getValue()); } } LayersProperty property = getLayersProperty(); property.setLayerState(filtered); } private Collection<String> getColumnsNeeded(Map<String, Map<String, String>> elements) { Set<String> columns = new TreeSet<String>(); for (Entry<String, Map<String, String>> entry : elements.entrySet()) { for (Entry<String, String> item : entry.getValue().entrySet()) { columns.add(item.getKey()); } } columns.add("id"); return columns; } @Override public Control createControl(Composite parent) { container = new Composite(parent, SWT.NONE); container.setLayoutData(new GridData(GridData.FILL_BOTH)); container.setLayout(new GridLayout(1, false)); Label l = new Label(container, SWT.TITLE); l.setText(Messages.LayersPropertyEditor_LayerStateLabel); Table table = new Table(container, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.CHECK); tableColumns = new ArrayList<TableViewerColumn>(); colToName = new ConcurrentHashMap<Integer, String>(); colToName.put(0, "id"); colToName.put(1, "opacity"); layerTable = new CheckboxTableViewer(table); layerTable.getTable().setLayoutData(new GridData(GridData.FILL_BOTH)); layerTable.setContentProvider(new IStructuredContentProvider() { @Override public void inputChanged(Viewer arg0, Object oldItem, Object newItem) { for (TableViewerColumn col : tableColumns) { col.getColumn().dispose(); } tableColumns.clear(); colToName.clear(); if (newItem != null) { Collection<String> cols = null; if (newItem instanceof Map) { cols = getColumnsNeeded((Map) newItem); } for (String s : cols) { if (!s.equals("id")) { createTableColumn(s, s.equals(LayersPropertyPersister.OPACITY_ATTRIBUTE_NAME)); } } createTableColumn("id", false); } } @Override public void dispose() { } @Override public Object[] getElements(Object element) { List items = new ArrayList(); Map<String, Map<String, String>> stateinfo = (Map<String, Map<String, String>>) element; for (Entry<String, Map<String, String>> entry : stateinfo.entrySet()) { items.add(entry); } return items.toArray(new Object[0]); } }); layerTable.getTable().setHeaderVisible(true); layerTable.getTable().setLinesVisible(true); labelProv = new CellLabelProvider() { @Override public void update(ViewerCell cell) { @SuppressWarnings("unchecked") Entry<String, Map<String, String>> entry = (Entry<String, Map<String, String>>) cell.getElement(); int index = cell.getColumnIndex(); String colName = colToName.get(index); cell.setText(colName.equals("id") ? entry.getKey() : entry.getValue().get(colName)); } }; fillFieldsFromProperty(getProperty()); return container; } /** * Creates a column with the given information * * @param columnHeader * The header title for the column * @param index * The index at which this column will be created. * @param editSupport */ private void createTableColumn(String columnHeader, boolean editSupport) { colToName.put(layerTable.getTable().getColumnCount(), columnHeader); TableViewerColumn col = new TableViewerColumn(layerTable, SWT.NONE); col.getColumn().setWidth(200); col.getColumn().setText(columnHeader); col.getColumn().setResizable(true); col.getColumn().setMoveable(false); tableColumns.add(col); layerTable.setLabelProvider(labelProv); if (editSupport) { col.setEditingSupport(getEditorSupport(col)); } } private EditingSupport getEditorSupport(TableViewerColumn col) { return new EditingSupport(col.getViewer()) { @Override protected CellEditor getCellEditor(Object element) { TextCellEditor textCellEditor = new TextCellEditor(layerTable.getTable()); textCellEditor.setValidator(new ICellEditorValidator() { @Override public String isValid(Object value) { try { Double.parseDouble((String) value); return null; } catch (Exception e) { return Messages.LayersPropertyEditor_InvalidOpacityMessage; } } }); return textCellEditor; } @Override protected boolean canEdit(Object element) { return true; } @SuppressWarnings("unchecked") @Override protected Object getValue(Object element) { return ((Entry<String, Map<String, String>>) element).getValue() .get(LayersPropertyPersister.OPACITY_ATTRIBUTE_NAME); } @SuppressWarnings("unchecked") @Override protected void setValue(Object element, Object value) { double newValue = Double.parseDouble((String) value); ((Entry<String, Map<String, String>>) element).getValue().put( LayersPropertyPersister.OPACITY_ATTRIBUTE_NAME, String.valueOf(Util.clamp(newValue, 0, 1))); layerTable.refresh(element, true); } }; } @Override public Control getControl() { return container; } @Override protected IBookmarkProperty createPropertyFromCurrent() { return BookmarkPropertyFactory.createProperty(LayersProperty.TYPE); } @Override protected void fillFieldsFromProperty(IBookmarkProperty property) { if (property == null) { layerState = new TreeMap<String, Map<String, String>>(); } else { layerTable.setInput(((LayersProperty) property).getLayerStateInfo()); } layerTable.setAllChecked(true); } private LayersProperty getLayersProperty() { return (LayersProperty) getProperty(); } }