Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2010 QNX Software Systems 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: * QNX Software Systems - Initial API and implementation *******************************************************************************/ package org.eclipse.cdt.debug.internal.ui.preferences; import java.util.ArrayList; import java.util.List; import org.eclipse.cdt.debug.core.CDebugCorePlugin; import org.eclipse.cdt.debug.internal.ui.ICDebugHelpContextIds; import org.eclipse.cdt.debug.internal.ui.sourcelookup.AddContainerAction; import org.eclipse.cdt.debug.internal.ui.sourcelookup.DownAction; import org.eclipse.cdt.debug.internal.ui.sourcelookup.EditContainerAction; import org.eclipse.cdt.debug.internal.ui.sourcelookup.RemoveAction; import org.eclipse.cdt.debug.internal.ui.sourcelookup.SourceContainerAction; import org.eclipse.cdt.debug.internal.ui.sourcelookup.SourceContainerViewer; import org.eclipse.cdt.debug.internal.ui.sourcelookup.UpAction; import org.eclipse.debug.core.sourcelookup.ISourceContainer; import org.eclipse.debug.core.sourcelookup.ISourceLookupDirector; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.FontMetrics; import org.eclipse.swt.graphics.GC; 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.Label; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; /** * The "Source Lookup Path" preference page. */ public class SourcePreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private SourceContainerViewer fPathViewer; private List<SourceContainerAction> fActions = new ArrayList<SourceContainerAction>(6); private IWorkbench fWorkbench; private AddContainerAction fAddAction; private EditContainerAction fEditAction; /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite) */ @Override protected Control createContents(Composite parent) { Font font = parent.getFont(); Composite comp = new Composite(parent, SWT.NONE); GridLayout topLayout = new GridLayout(); topLayout.numColumns = 2; comp.setLayout(topLayout); GridData gd = new GridData(GridData.FILL_BOTH); comp.setLayoutData(gd); Label viewerLabel = new Label(comp, SWT.LEFT); viewerLabel.setText(PreferenceMessages.getString("SourcePreferencePage.0")); //$NON-NLS-1$ gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL); gd.horizontalSpan = 2; viewerLabel.setLayoutData(gd); viewerLabel.setFont(font); fPathViewer = new SourceContainerViewer(comp); gd = new GridData(GridData.FILL_BOTH); fPathViewer.getControl().setLayoutData(gd); fPathViewer.getControl().setFont(font); Composite pathButtonComp = new Composite(comp, SWT.NONE); GridLayout pathButtonLayout = new GridLayout(); pathButtonLayout.marginHeight = 0; pathButtonLayout.marginWidth = 0; pathButtonComp.setLayout(pathButtonLayout); gd = new GridData(GridData.VERTICAL_ALIGN_BEGINNING | GridData.HORIZONTAL_ALIGN_FILL); pathButtonComp.setLayoutData(gd); pathButtonComp.setFont(font); createVerticalSpacer(comp, 2); GC gc = new GC(parent); gc.setFont(parent.getFont()); FontMetrics fontMetrics = gc.getFontMetrics(); gc.dispose(); fAddAction = new AddContainerAction(); Button button = createPushButton(pathButtonComp, fAddAction.getText(), fontMetrics); fAddAction.setButton(button); addAction(fAddAction); fEditAction = new EditContainerAction(); button = createPushButton(pathButtonComp, fEditAction.getText(), fontMetrics); fEditAction.setButton(button); addAction(fEditAction); SourceContainerAction action = new RemoveAction(); button = createPushButton(pathButtonComp, action.getText(), fontMetrics); action.setButton(button); addAction(action); action = new UpAction(); button = createPushButton(pathButtonComp, action.getText(), fontMetrics); action.setButton(button); addAction(action); action = new DownAction(); button = createPushButton(pathButtonComp, action.getText(), fontMetrics); action.setButton(button); addAction(action); retargetActions(fPathViewer); Dialog.applyDialogFont(comp); getWorkbench().getHelpSystem().setHelp(comp, ICDebugHelpContextIds.SOURCE_PREFERENCE_PAGE); initialize(); return comp; } /* * (non-Javadoc) * * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench) */ @Override public void init(IWorkbench workbench) { fWorkbench = workbench; } private Button createPushButton(Composite parent, String label, FontMetrics fontMetrics) { Button button = new Button(parent, SWT.PUSH); button.setFont(parent.getFont()); button.setText(label); GridData gd = getButtonGridData(button, fontMetrics); button.setLayoutData(gd); return button; } private GridData getButtonGridData(Button button, FontMetrics fontMetrics) { GridData gd = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING); int widthHint = Dialog.convertHorizontalDLUsToPixels(fontMetrics, IDialogConstants.BUTTON_WIDTH); gd.widthHint = Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x); return gd; } private IWorkbench getWorkbench() { return fWorkbench; } private void addAction(SourceContainerAction action) { fActions.add(action); } private void retargetActions(SourceContainerViewer viewer) { for (SourceContainerAction action : fActions) { action.setViewer(viewer); } } private void createVerticalSpacer(Composite comp, int colSpan) { Label label = new Label(comp, SWT.NONE); GridData gd = new GridData(); gd.horizontalSpan = colSpan; label.setLayoutData(gd); } private void initialize() { ISourceLookupDirector director = CDebugCorePlugin.getDefault().getCommonSourceLookupDirector(); fPathViewer.setEntries(director.getSourceContainers()); fAddAction.setSourceLookupDirector(director); fEditAction.setSourceLookupDirector(director); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#performDefaults() */ @Override protected void performDefaults() { fPathViewer.setEntries(new ISourceContainer[0]); super.performDefaults(); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#performOk() */ @Override public boolean performOk() { CDebugCorePlugin.getDefault().getCommonSourceLookupDirector().setSourceContainers(fPathViewer.getEntries()); CDebugCorePlugin.getDefault().savePluginPreferences(); return true; } }