Java tutorial
/* * Copyright (c) 2013, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html * * 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.github.sdbg.debug.ui.internal.util; import com.github.sdbg.debug.ui.internal.chrome.ChromeLaunchMessages; import com.github.sdbg.debug.ui.internal.util.AppSelectionDialog.HtmlResourceFilter; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspace; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.Path; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.layout.PixelConverter; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.dialogs.ElementListSelectionDialog; import org.eclipse.ui.dialogs.FilteredItemsSelectionDialog; /** * A composite that creates a group to enter html and url information for chrome/browser launch */ public class LaunchTargetComposite extends Composite { protected ModifyListener textModifyListener = new ModifyListener() { @Override public void modifyText(ModifyEvent e) { notifyPanelChanged(); } }; private Button htmlButton; private Text htmlText; private Button htmlBrowseButton; private Button urlButton; private Text urlText; private Text projectText; private Button projectBrowseButton; private int widthHint; private Label projectLabel; public LaunchTargetComposite(Composite parent, int style, boolean allowHtmlFile) { super(parent, style); GridLayout layout = new GridLayout(1, false); layout.marginHeight = 0; layout.marginWidth = 0; setLayout(layout); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.TOP).applyTo(this); Group group = new Group(this, SWT.NONE); group.setText(ChromeLaunchMessages.ChromeMainTab_LaunchTarget); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.TOP).applyTo(group); GridLayoutFactory.swtDefaults().numColumns(3).applyTo(group); if (allowHtmlFile) { createHtmlField(group); } Label filler = new Label(group, SWT.NONE); GridDataFactory.swtDefaults().span(3, 1).hint(-1, 4).applyTo(filler); createUrlField(group, allowHtmlFile); } public int getButtonWidthHint() { return widthHint; } public String getErrorMessage() { if (htmlButton != null && htmlButton.getSelection() && htmlText.getText().length() == 0) { return ChromeLaunchMessages.ChromeMainTab_NoHtmlFile; } if (urlButton == null || urlButton.getSelection()) { String url = urlText.getText(); if (urlButton != null) { if (url.length() == 0) { return ChromeLaunchMessages.ChromeMainTab_NoUrl; } if (!isValidUrl(url)) { return ChromeLaunchMessages.ChromeMainTab_InvalidURL; } } if (projectText.getText().length() == 0) { return ChromeLaunchMessages.ChromeMainTab_NoProject; } try { IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(projectText.getText()); if (!project.exists()) { return ChromeLaunchMessages.ChromeMainTab_InvalidProject; } } catch (IllegalArgumentException e) { return ChromeLaunchMessages.ChromeMainTab_InvalidProject + ": " + e.getMessage(); } } return null; } public boolean getHtmlButtonSelection() { return htmlButton != null ? htmlButton.getSelection() : false; } public String getHtmlFileName() { return htmlText != null ? htmlText.getText().trim() : ""; } public int getLabelColumnWidth() { projectLabel.pack(); return projectLabel.getSize().x; } public String getProject() { return projectText.getText().trim(); } public String getUrlString() { return urlText.getText().trim(); } public void setHtmlButtonSelection(boolean state) { if (htmlButton != null) { htmlButton.setSelection(state); urlButton.setSelection(!state); updateEnablements(state); } } public void setHtmlTextValue(String string) { if (htmlText != null) { htmlText.setText(string); } } public void setProjectTextValue(String sourceDirectoryName) { projectText.setText(sourceDirectoryName); } public void setUrlTextValue(String string) { urlText.setText(string); } protected void createHtmlField(Composite composite) { htmlButton = new Button(composite, SWT.RADIO); htmlButton.setText(ChromeLaunchMessages.ChromeMainTab_HtmlFileLabel); htmlButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { updateEnablements(true); notifyPanelChanged(); } }); htmlText = new Text(composite, SWT.BORDER | SWT.SINGLE); htmlText.addModifyListener(textModifyListener); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).hint(400, SWT.DEFAULT).grab(true, false) .applyTo(htmlText); htmlBrowseButton = new Button(composite, SWT.PUSH); htmlBrowseButton.setText(ChromeLaunchMessages.ChromeMainTab_SelectHtmlFile); PixelConverter converter = new PixelConverter(htmlBrowseButton); int widthHint = converter.convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.BEGINNING).hint(widthHint, -1).applyTo(htmlBrowseButton); htmlBrowseButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { handleApplicationBrowseButton(); } }); } protected void createUrlField(Composite composite, boolean allowHtmlFile) { if (allowHtmlFile) { urlButton = new Button(composite, SWT.RADIO); urlButton.setText(ChromeLaunchMessages.ChromeMainTab_UrlLabel); urlButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { updateEnablements(false); notifyPanelChanged(); } }); } else { Label urlLabel = new Label(composite, SWT.NONE); urlLabel.setText(ChromeLaunchMessages.ChromeMainTab_UrlFilterLabel); GridDataFactory.swtDefaults().applyTo(urlLabel); } urlText = new Text(composite, SWT.BORDER | SWT.SINGLE); urlText.addModifyListener(textModifyListener); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(urlText); // spacer new Label(composite, SWT.NONE); projectLabel = new Label(composite, SWT.NONE); projectLabel.setText(ChromeLaunchMessages.ChromeMainTab_ProjectLabel); if (allowHtmlFile) { GridDataFactory.swtDefaults().indent(20, 0).applyTo(projectLabel); } else { GridDataFactory.swtDefaults().applyTo(projectLabel); } projectText = new Text(composite, SWT.BORDER | SWT.SINGLE); projectText.addModifyListener(textModifyListener); projectText.setCursor(composite.getShell().getDisplay().getSystemCursor(SWT.CURSOR_ARROW)); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(projectText); projectBrowseButton = new Button(composite, SWT.PUSH); projectBrowseButton.setText(ChromeLaunchMessages.ChromeMainTab_SelectProject); PixelConverter converter = new PixelConverter(projectBrowseButton); widthHint = converter.convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.BEGINNING).hint(widthHint, -1) .applyTo(projectBrowseButton); projectBrowseButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { handleProjectBrowseButton(); } }); } protected void handleApplicationBrowseButton() { IWorkspace workspace = ResourcesPlugin.getWorkspace(); AppSelectionDialog dialog = new AppSelectionDialog(getShell(), workspace.getRoot(), new HtmlResourceFilter()); dialog.setTitle(ChromeLaunchMessages.ChromeMainTab_SelectHtml); dialog.setInitialPattern(".", FilteredItemsSelectionDialog.FULL_SELECTION); //$NON-NLS-1$ IPath path = new Path(htmlText.getText()); if (workspace.validatePath(path.toString(), IResource.FILE).isOK()) { IFile file = workspace.getRoot().getFile(path); if (file != null && file.exists()) { dialog.setInitialSelections(new Object[] { path }); } } dialog.open(); Object[] results = dialog.getResult(); if ((results != null) && (results.length > 0) && (results[0] instanceof IFile)) { IFile file = (IFile) results[0]; String pathStr = file.getFullPath().toPortableString(); htmlText.setText(pathStr); notifyPanelChanged(); } } protected void handleProjectBrowseButton() { // ContainerSelectionDialog dialog = new ContainerSelectionDialog( // getShell(), // null, // false, // ChromeLaunchMessages.ChromeMainTab_SelectProject); // // dialog.open(); // // Object[] results = dialog.getResult(); // // if ((results != null) && (results.length > 0)) { // String pathStr = ((IPath) results[0]).toString(); // projectText.setText(pathStr); // notifyPanelChanged(); // } IProject project = chooseProject(); if (project != null) { projectText.setText(project.getName()); notifyPanelChanged(); } } protected void updateEnablements(boolean isFile) { if (isFile) { htmlText.setEnabled(true); htmlBrowseButton.setEnabled(true); urlText.setEnabled(false); projectText.setEnabled(false); projectBrowseButton.setEnabled(false); } else { htmlText.setEnabled(false); htmlBrowseButton.setEnabled(false); urlText.setEnabled(true); projectText.setEnabled(true); projectBrowseButton.setEnabled(true); } } private IProject chooseProject() { ElementListSelectionDialog dialog = new ElementListSelectionDialog(getShell(), new LabelProvider() { @Override public String getText(Object element) { return ((IProject) element).getName(); } }); dialog.setTitle(ChromeLaunchMessages.ChromeMainTab_SelectProjectTitle); dialog.setMessage(ChromeLaunchMessages.ChromeMainTab_SelectProjectMessage); dialog.setElements(ResourcesPlugin.getWorkspace().getRoot().getProjects()); IProject project = null; try { project = ResourcesPlugin.getWorkspace().getRoot().getProject(getProject()); } catch (IllegalArgumentException e) { // Best effort } if (project != null && project.exists()) { dialog.setInitialSelections(new Object[] { project }); } if (dialog.open() == Window.OK) { return (IProject) dialog.getFirstResult(); } return null; } private boolean isValidUrl(String url) { final String[] validSchemes = new String[] { "file:", "http:", "https:" }; for (String scheme : validSchemes) { if (url.startsWith(scheme)) { return true; } } return false; } private void notifyPanelChanged() { Event event = new Event(); event.type = SWT.Modify; event.widget = this; notifyListeners(SWT.Modify, event); } }