Java tutorial
/* * Copyright (C) 2012 The Android Open Source Project * * 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 com.motorolamobility.preflighting.ui.tabs; import java.util.Collection; import java.util.List; import java.util.StringTokenizer; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Image; 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.Group; import org.eclipse.swt.widgets.Layout; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import com.motorolamobility.preflighting.core.devicespecification.DeviceSpecification; import com.motorolamobility.preflighting.core.validation.ValidationManager; import com.motorolamobility.preflighting.ui.PreflightingUIPlugin; import com.motorolamobility.preflighting.ui.i18n.PreflightingUiNLS; /** * This class represents the Devices Tab on the app validador preference page. */ public class DevicesTabComposite extends AbstractAppValidatorTabComposite { private final class ColumnSelectionAdapter extends SelectionAdapter { private int columnIndex; public ColumnSelectionAdapter(int columnIndex) { this.columnIndex = columnIndex; } @Override public void widgetSelected(SelectionEvent e) { devicesTableComparator.setColumn(columnIndex); devicesTableViewer.getTable().setSortColumn((TableColumn) e.getSource()); devicesTableViewer.getTable().setSortDirection(devicesTableComparator.getSwtDirection()); devicesTableViewer.refresh(); super.widgetSelected(e); } } /* * Table content provider */ public class DevicesContentProvider implements IStructuredContentProvider { @SuppressWarnings("unchecked") public Object[] getElements(Object inputElement) { return ((List<DeviceSpecification>) inputElement).toArray(); } public void dispose() { //do nothing } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { //do nothing } } /* * Table label provider */ public class DevicesLabelProvider implements ITableLabelProvider { public void addListener(ILabelProviderListener listener) { //do nothing } public void dispose() { //do nothing } public boolean isLabelProperty(Object element, String property) { return false; } public void removeListener(ILabelProviderListener listener) { //do nothing } public Image getColumnImage(Object element, int columnIndex) { return null; } public String getColumnText(Object element, int columnIndex) { String text = ""; //$NON-NLS-1$ DeviceSpecification deviceSpec = (DeviceSpecification) element; switch (columnIndex) { case NAME_COLUMN_INDEX: text = deviceSpec.getName(); break; case SCREENSIZE_COLUMN_INDEX: text = deviceSpec.getDeviceInfo().getDefault().getScreenSize(); break; case PIXELDENSITY_COLUMN_INDEX: text = deviceSpec.getDeviceInfo().getDefault().getPixelDensity(); break; default: break; } return text; } } /* * Table comparator * Add sort functionality */ private class DevicesTableComparator extends ViewerComparator { private final int ORDER_ASC = 1; private final int ORDER_DESC = -1; /** * Column that must be used to sort elements */ private int column = -1; private int direction = ORDER_ASC; public void setColumn(int column) { if (this.column == column) { direction = direction == ORDER_ASC ? ORDER_DESC : ORDER_ASC; } else { this.column = column; direction = ORDER_ASC; } } /* * (non-Javadoc) * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) */ @Override public int compare(Viewer viewer, Object e1, Object e2) { DeviceSpecification deviceLeft = (DeviceSpecification) e1; DeviceSpecification deviceRight = (DeviceSpecification) e2; String left = ""; //$NON-NLS-1$ String right = ""; //$NON-NLS-1$ switch (column) { case NAME_COLUMN_INDEX: left = deviceLeft.getName(); right = deviceRight.getName(); break; case SCREENSIZE_COLUMN_INDEX: left = deviceLeft.getDeviceInfo().getDefault().getScreenSize(); right = deviceRight.getDeviceInfo().getDefault().getScreenSize(); break; case PIXELDENSITY_COLUMN_INDEX: left = deviceLeft.getDeviceInfo().getDefault().getPixelDensity(); right = deviceRight.getDeviceInfo().getDefault().getPixelDensity(); break; default: break; } return left.compareTo(right) * direction; } /** * Returns the SWT constant which represents the direction * @return */ public int getSwtDirection() { return direction == ORDER_ASC ? SWT.UP : SWT.DOWN; } } private static final String NO_DEVICE_SELECTED = "none"; //$NON-NLS-1$ /** * Index of device name column */ private static final int NAME_COLUMN_INDEX = 0; /** * Index of screen size column */ private static final int SCREENSIZE_COLUMN_INDEX = 1; /** * Index of pixel density column */ private static final int PIXELDENSITY_COLUMN_INDEX = 2; private Button selectAllCheck; private CheckboxTableViewer devicesTableViewer; private DevicesTableComparator devicesTableComparator; /** * Construct the GUI for the Devices Tab. * @param parent * @param style * @param preferenceStore */ public DevicesTabComposite(Composite parent, int style, IPreferenceStore preferenceStore) { super(parent, style); //Create main layout this.setLayout(new GridLayout(1, false)); Group deviceListGroup = new Group(this, SWT.NONE); Layout layout = new GridLayout(1, false); deviceListGroup.setLayout(layout); deviceListGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); deviceListGroup.setText(PreflightingUiNLS.DevicesTabComposite_Devices_Group); devicesTableViewer = CheckboxTableViewer.newCheckList(deviceListGroup, SWT.BORDER | SWT.MULTI | SWT.FULL_SELECTION); Control devicesTableControl = devicesTableViewer.getTable(); GridData gd = new GridData(GridData.FILL_BOTH); gd.heightHint = parent.getSize().y; devicesTableControl.setLayoutData(gd); devicesTableComparator = new DevicesTableComparator(); devicesTableViewer.setComparator(devicesTableComparator); //Create Columns TableViewerColumn column = new TableViewerColumn(devicesTableViewer, SWT.NONE); column.getColumn().setText(PreflightingUiNLS.DevicesTabComposite_Name_Column); column.getColumn().setResizable(true); column.getColumn().setWidth(250); column.getColumn().addSelectionListener(new ColumnSelectionAdapter(NAME_COLUMN_INDEX)); column = new TableViewerColumn(devicesTableViewer, SWT.NONE); column.getColumn().setText(PreflightingUiNLS.DevicesTabComposite_ScreenSize_Column); column.getColumn().setResizable(true); column.getColumn().setWidth(80); column.getColumn().addSelectionListener(new ColumnSelectionAdapter(SCREENSIZE_COLUMN_INDEX)); column = new TableViewerColumn(devicesTableViewer, SWT.NONE); column.getColumn().setText(PreflightingUiNLS.DevicesTabComposite_pixelDensity_Column); column.getColumn().setResizable(true); column.getColumn().setWidth(80); column.getColumn().addSelectionListener(new ColumnSelectionAdapter(PIXELDENSITY_COLUMN_INDEX)); //Configure Table devicesTableViewer.getTable().setHeaderVisible(true); devicesTableViewer.setContentProvider(new DevicesContentProvider()); devicesTableViewer.setLabelProvider(new DevicesLabelProvider()); ValidationManager validationManager = new ValidationManager(); Collection<DeviceSpecification> deviceSpecifications = validationManager.getDevicesSpecsContainer() .getDeviceSpecifications(); devicesTableViewer.setInput(deviceSpecifications); devicesTableViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { boolean isAllSelected = isAllItemsChecked(); selectAllCheck.setSelection(isAllSelected); } }); //Create Select all section Composite bottomComposite = new Composite(deviceListGroup, SWT.NONE); gd = new GridData(SWT.FILL, SWT.BOTTOM, true, false); bottomComposite.setLayoutData(gd); layout = new GridLayout(2, true); bottomComposite.setLayout(layout); gd = new GridData(SWT.END, SWT.CENTER, false, true); selectAllCheck = new Button(bottomComposite, SWT.CHECK); selectAllCheck.setText(PreflightingUiNLS.DevicesTabComposite_SelectAll_Check); selectAllCheck.setLayoutData(gd); selectAllCheck.setSelection(true); selectAllCheck.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { modifyCheckBoxes(selectAllCheck.getSelection()); super.widgetSelected(e); } }); init(preferenceStore); } /* * Load data from preference store, reflecting in the GUI. */ private void init(IPreferenceStore preferenceStore) { String prefKey = preferenceStore.getString(PreflightingUIPlugin.DEVICES_PREFERENCE_KEY); if (prefKey.length() > 0) //Found devices, check them! { if (!prefKey.equals(NO_DEVICE_SELECTED)) { modifyCheckBoxes(false); StringTokenizer tokenizer = new StringTokenizer(prefKey, ","); //$NON-NLS-1$ while (tokenizer.hasMoreTokens()) { String deviceIdPref = tokenizer.nextToken(); checkTableItem(deviceIdPref); } } } else { performDefaults(); } selectAllCheck.setSelection(isAllItemsChecked()); } private void checkTableItem(String deviceIdPref) { TableItem[] tableItems = devicesTableViewer.getTable().getItems(); boolean found = false; int i = 0; while (!found && (i < tableItems.length)) { TableItem tableItem = tableItems[i]; DeviceSpecification deviceSpec = (DeviceSpecification) tableItem.getData(); String deviceIdTable = deviceSpec.getId(); if (deviceIdTable.equalsIgnoreCase(deviceIdPref)) { tableItem.setChecked(true); found = true; } else { i++; } } } /* * (non-Javadoc) * @see com.motorolamobility.preflighting.ui.tabs.AbstractAppValidatorTabComposite#performDefaults() */ @Override public void performDefaults() { modifyCheckBoxes(true); selectAllCheck.setSelection(true); } /* * (non-Javadoc) * @see com.motorolamobility.preflighting.ui.tabs.AbstractAppValidatorTabComposite#performOk(org.eclipse.jface.preference.IPreferenceStore) */ @Override public void performOk(IPreferenceStore preferenceStore) { Object[] elements = devicesTableViewer.getCheckedElements(); //Build the comma separated list with all checked devices ids StringBuilder stringBuilder = new StringBuilder(); for (Object element : elements) { DeviceSpecification deviceSpec = (DeviceSpecification) element; stringBuilder.append(deviceSpec.getId()); stringBuilder.append(","); //$NON-NLS-1$ } //Remove the last comma. if (stringBuilder.length() > 0) { stringBuilder.deleteCharAt(stringBuilder.length() - 1); } else if (stringBuilder.length() == 0) { stringBuilder.append(NO_DEVICE_SELECTED); } preferenceStore.setValue(PreflightingUIPlugin.DEVICES_PREFERENCE_KEY, stringBuilder.toString()); preferenceStore.setValue(PreflightingUIPlugin.USE_ALL_DEVICES_PREFERENCE_KEY, selectAllCheck.getSelection()); } /* * Update all checkboxes with the given value */ private void modifyCheckBoxes(boolean check) { TableItem[] items = devicesTableViewer.getTable().getItems(); for (TableItem tableItem : items) { tableItem.setChecked(check); } } /* * Verifies if all items are checked */ private boolean isAllItemsChecked() { TableItem[] items = devicesTableViewer.getTable().getItems(); boolean allChecked = true; int i = 0; while ((i < items.length) && allChecked) { TableItem tableItem = items[i]; if (!tableItem.getChecked()) { allChecked = false; } i++; } return allChecked; } @Override public IStatus isValid() { return Status.OK_STATUS; } @Override public String commandLineBuilder() { String commandline = null; if (!isAllItemsChecked()) { Object[] checkedElements = devicesTableViewer.getCheckedElements(); StringBuilder stringBuilder = new StringBuilder(150); if (checkedElements.length > 0) { for (Object checkedObj : checkedElements) { DeviceSpecification deviceSpec = (DeviceSpecification) checkedObj; stringBuilder.append("-d "); stringBuilder.append(deviceSpec.getId()); stringBuilder.append(" "); } } else { stringBuilder.append("-d none"); } commandline = stringBuilder.toString().trim(); } else { commandline = ""; } return commandline; } }