Java tutorial
/******************************************************************************* * Copyright 2014 United States Government as represented by the * Administrator of the National Aeronautics and Space Administration. * All Rights Reserved. * * 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 gov.nasa.ensemble.common.ui.multiselect; /******************************************************************************* * Copyright (c) 2004, 2009 Tasktop Technologies 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: * Tasktop Technologies - initial API and implementation *******************************************************************************/ import gov.nasa.ensemble.common.logging.LogUtil; import java.util.HashSet; import java.util.Set; import org.eclipse.core.runtime.ISafeRunnable; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.PopupDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.util.SafeRunnable; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; 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.Monitor; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.PlatformUI; /** * Abstract class for an in-place popup dialog that has a cancel button and sends and ok event when the dialog is closed * * @author Shawn Minto * @since 3.3 */ public abstract class AbstractInPlaceDialog extends PopupDialog { public static final int ID_CLICK_OUT = 0; public static final int ID_DESELECT_ALL = IDialogConstants.CLIENT_ID + 1; public static final int ID_OK = IDialogConstants.CLIENT_ID + 2; protected static final int MARGIN_SIZE = 3; private final int side; private final Rectangle controlBounds; private Control control; private final Set<IInPlaceDialogListener> listeners = new HashSet<IInPlaceDialogListener>(); private final Control openControl; public static final String ID_PLUGIN = "multiselect!"; DisposeListener disposeListener = new DisposeListener() { @Override public void widgetDisposed(DisposeEvent e) { dispose(); } }; public AbstractInPlaceDialog(Shell parent, int side, Control openControl) { super(parent, PopupDialog.INFOPOPUP_SHELLSTYLE, false, false, false, false, false, null, null); this.side = side; this.openControl = openControl; Rectangle bounds; if (openControl == null || openControl.isDisposed()) { bounds = new Rectangle(0, 0, 0, 0); } else { bounds = openControl.getBounds(); Point absPosition = openControl.toDisplay(openControl.getLocation()); bounds.x = absPosition.x - bounds.x; bounds.y = absPosition.y - bounds.y; } this.controlBounds = bounds; if (openControl != null) { openControl.addDisposeListener(disposeListener); } } @Override protected Control createContents(Composite parent) { return createDialogArea(parent); } @Override protected Control createDialogArea(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridLayout gl = new GridLayout(); gl.marginHeight = 0; gl.marginWidth = 0; gl.horizontalSpacing = 0; gl.verticalSpacing = 0; gl.numColumns = 1; composite.setLayout(gl); GridDataFactory.fillDefaults().grab(true, true).applyTo(composite); this.control = createControl(composite); Composite buttonComposite = new Composite(parent, SWT.NONE); gl.makeColumnsEqualWidth = false; buttonComposite.setLayout(gl); GridDataFactory.fillDefaults().grab(true, false).align(SWT.END, SWT.CENTER).applyTo(buttonComposite); createButtons(buttonComposite); Dialog.applyDialogFont(parent); parent.pack(); setBackgroundColor(parent); return parent; } private void setBackgroundColor(Composite parent) { parent.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_WHITE)); for (Control control : parent.getChildren()) { if (control instanceof Composite) { setBackgroundColor((Composite) control); } else { control.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_WHITE)); } } } protected abstract Control createControl(Composite composite); protected void createButtons(Composite composite) { createButton(composite, ID_DESELECT_ALL, "Deselect all", true); createButton(composite, ID_OK, "OK", true); } protected void dispose() { setReturnCode(Window.CANCEL); close(); } protected Control createButton(Composite composite, final int returnCode, String text, final boolean shouldClose) { Button button = new Button(composite, SWT.NONE); button.setText(text); button.addSelectionListener(new SelectionListener() { @Override public void widgetSelected(SelectionEvent e) { setReturnCode(returnCode); if (shouldClose) { close(); } else { notifyButtonPressed(false); } } @Override public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); } }); if (composite.getLayout() instanceof GridLayout) { ((GridLayout) composite.getLayout()).numColumns = composite.getChildren().length; } GridDataFactory.fillDefaults().applyTo(button); return button; } @Override public int open() { int result = super.open(); getControl().setFocus(); setReturnCode(-1); return result; } @Override public boolean close() { if (getReturnCode() == -1) { setReturnCode(Window.OK); } notifyButtonPressed(true); if (openControl != null && !openControl.isDisposed()) { openControl.removeDisposeListener(disposeListener); } return super.close(); } public void addEventListener(IInPlaceDialogListener listener) { listeners.add(listener); } public void removeCloseListener(IInPlaceDialogListener listener) { listeners.remove(listener); } private void notifyButtonPressed(boolean isClosing) { final InPlaceDialogEvent event = new InPlaceDialogEvent(getReturnCode(), isClosing); for (final IInPlaceDialogListener listener : listeners) { SafeRunnable.run(new ISafeRunnable() { @Override public void run() throws Exception { listener.buttonPressed(event); } @Override public void handleException(Throwable exception) { LogUtil.error(new Status(IStatus.ERROR, "Multiselect Widget!", "Error while notifying IInPlaceCloseListener", exception)); } }); } } @Override protected void initializeBounds() { Rectangle monitorBounds = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().getMonitor() .getClientArea(); Rectangle bounds = getShell().getBounds(); int x = 0; int y = 0; switch (side) { case SWT.TOP: x = controlBounds.x; y = controlBounds.y + controlBounds.height; if (x + bounds.width > monitorBounds.x + monitorBounds.width) { x = (controlBounds.x + controlBounds.width) - bounds.width; } break; case SWT.BOTTOM: x = controlBounds.x; y = controlBounds.y - bounds.height; if (x + bounds.width > monitorBounds.x + monitorBounds.width) { x = (controlBounds.x + controlBounds.width) - bounds.width; } break; case SWT.RIGHT: x = (controlBounds.x + controlBounds.width) - bounds.width; y = controlBounds.y + controlBounds.height; break; case SWT.LEFT: x = controlBounds.x; y = controlBounds.y + controlBounds.height; break; } getShell().setBounds(x, y, bounds.width, bounds.height); } @Override protected void adjustBounds() { Point tipSize = getShell().getSize(); Point location = getShell().getLocation(); Rectangle bounds; Point rightBounds = new Point(tipSize.x + location.x, tipSize.y + location.y); Monitor[] ms = getShell().getDisplay().getMonitors(); if (ms.length > 1) { bounds = controlBounds; Point p = new Point(location.x, location.y); Rectangle tmp; for (Monitor element : ms) { tmp = element.getBounds(); if (tmp.contains(p)) { bounds = tmp; break; } } } else { bounds = getControl().getDisplay().getBounds(); } if (!(bounds.contains(location) && bounds.contains(rightBounds))) { if (rightBounds.x > bounds.x + bounds.width) { location.x -= rightBounds.x - (bounds.x + bounds.width); } if (rightBounds.y > bounds.y + bounds.height) { location.y -= rightBounds.y - (bounds.y + bounds.height); } if (location.x < bounds.x) { location.x = bounds.x; } if (location.y < bounds.y) { location.y = bounds.y; } } getShell().setLocation(location); } public Control getControl() { return control; } }