eclipse cdt wizard simple class

public abstract class AbstractFileCreationWizardPage extends NewElementWizardPage { private static final int MAX_FIELD_CHARS = 50; private static final String NO_TEMPLATE = ""; //$NON-NLS-1$ private IWorkspaceRoot fWorkspaceRoot; // field IDs private static final int SOURCE_FOLDER_ID = 1; protected static final int NEW_FILE_ID = 2; private static final int ALL_FIELDS = SOURCE_FOLDER_ID | NEW_FILE_ID; int fLastFocusedField = 0; private StringButtonDialogField fSourceFolderDialogField; private IStatus fSourceFolderStatus; private IStatus fNewFileStatus; private final IStatus STATUS_OK = new StatusInfo(); /** * This flag isFirstTime is used to keep a note * that the file creation wizard has just been * created. */ private boolean isFirstTime = true; public AbstractFileCreationWizardPage(String name) { super(name); setDescription(NewFileWizardMessages.AbstractFileCreationWizardPage_description); fWorkspaceRoot = ResourcesPlugin.getWorkspace().getRoot(); SourceFolderFieldAdapter sourceFolderAdapter = new SourceFolderFieldAdapter(); fSourceFolderDialogField = new StringButtonDialogField(sourceFolderAdapter); fSourceFolderDialogField.setDialogFieldListener(sourceFolderAdapter); fSourceFolderDialogField.setLabelText(NewFileWizardMessages.AbstractFileCreationWizardPage_sourceFolder_label); fSourceFolderDialogField.setButtonLabel(NewFileWizardMessages.AbstractFileCreationWizardPage_sourceFolder_button); fTemplates= getApplicableTemplates(); if (fTemplates != null && fTemplates.length > 0) { fTemplateDialogField= new ComboDialogField(SWT.READ_ONLY); fTemplateDialogField.setLabelText(NewFileWizardMessages.AbstractFileCreationWizardPage_template_label); } fSourceFolderStatus = STATUS_OK; fNewFileStatus = STATUS_OK; fLastFocusedField = 0; } // -------- UI Creation --------- public void createControl(Composite parent) { initializeDialogUnits(parent); Composite composite = new Composite(parent, SWT.NONE); int nColumns = 3; GridLayout layout = new GridLayout(); layout.numColumns = nColumns; composite.setLayout(layout); composite.setLayoutData(new GridData(GridData.FILL_BOTH)); composite.setFont(parent.getFont()); createSourceFolderControls(composite, nColumns); createFileControls(composite, nColumns - 1); // Placeholder for the right column. (new Composite(composite, SWT.NO_FOCUS)).setLayoutData(new GridData(1, 1)); createTemplateControls(composite, nColumns); composite.layout(); setErrorMessage(null); setMessage(null); setControl(composite); } /** * Creates the necessary controls (label, text field and browse button) to edit * the source folder location. The method expects that the parent composite * uses a <code>GridLayout</code> as its layout manager and that the * grid layout has at least 3 columns. * * @param parent the parent composite * @param nColumns the number of columns to span. This number must be * greater or equal three */ protected void createSourceFolderControls(Composite parent, int nColumns) { fSourceFolderDialogField.doFillIntoGrid(parent, nColumns); Text textControl = fSourceFolderDialogField.getTextControl(null); LayoutUtil.setWidthHint(textControl, getMaxFieldWidth()); textControl.addFocusListener(new StatusFocusListener(SOURCE_FOLDER_ID)); } /** * The wizard owning this page is responsible for calling this method with the * current selection. The selection is used to initialize the fields of the wizard * page(初始化selection). * * @param selection used to initialize the fields */ public void init(IStructuredSelection selection) { ICElement celem = getInitialCElement(selection); // 初始化 源文件夹, 并将其设入到 source folder name text *************** initFields(celem); doStatusUpdate(); } /** * Utility method to inspect a selection to find a C element. * * @param selection the selection to be inspected * @return a C element to be used as the initial selection, or <code>null</code>, * if no C element exists in the given selection */ protected ICElement getInitialCElement(IStructuredSelection selection) { ICElement celem = null; if (selection != null && !selection.isEmpty()) { Object selectedElement = selection.getFirstElement(); if (selectedElement instanceof IAdaptable) { IAdaptable adaptable = (IAdaptable) selectedElement; celem = (ICElement) adaptable.getAdapter(ICElement.class); if (celem == null) { IResource resource = (IResource) adaptable.getAdapter(IResource.class); if (resource != null && resource.getType() != IResource.ROOT) { while (celem == null && resource.getType() != IResource.PROJECT) { celem = (ICElement) resource.getAdapter(ICElement.class); resource = resource.getParent(); } if (celem == null) { celem = CoreModel.getDefault().create(resource); // c project } } } } } if (celem == null) { IWorkbenchPart part = CUIPlugin.getActivePage().getActivePart(); if (part instanceof ContentOutline) { part = CUIPlugin.getActivePage().getActiveEditor(); } if (part instanceof IViewPartInputProvider) { Object elem = ((IViewPartInputProvider)part).getViewPartInput(); if (elem instanceof ICElement) { celem = (ICElement) elem; } } if (celem == null && part instanceof CEditor) { IEditorInput input = ((IEditorPart)part).getEditorInput(); if (input != null) { final IResource res = (IResource) input.getAdapter(IResource.class); if (res != null && res instanceof IFile) { celem = CoreModel.getDefault().create((IFile)res); } } } } if (celem == null || celem.getElementType() == ICElement.C_MODEL) { try { ICProject[] projects = CoreModel.create(getWorkspaceRoot()).getCProjects(); if (projects.length == 1) { celem = projects[0]; } } catch (CModelException e) { CUIPlugin.log(e); } } return celem; } /** * Initializes all fields provided by the page with a given selection. * * @param elem the selection used to initialize this page or <code> * null</code> if no selection was available */ protected void initFields(ICElement elem) { initSourceFolder(elem); updateTemplates(); handleFieldChanged(ALL_FIELDS); } /** * Initializes the source folder field. * * @param elem the C element used to compute the initial folder */ protected void initSourceFolder(ICElement elem) { ICContainer folder = null; if (elem != null) { folder = CModelUtil.getSourceFolder(elem); if (folder == null) { ICProject cproject = elem.getCProject(); if (cproject != null) { try { if (cproject.exists()) { ISourceRoot[] roots = cproject.getSourceRoots(); if (roots != null && roots.length > 0) folder = roots[0]; } } catch (CModelException e) { CUIPlugin.log(e); } if (folder == null) { folder = cproject.findSourceRoot(cproject.getResource()); } } } } setSourceFolderFullPath(folder != null ? folder.getResource().getFullPath() : null, false); } protected final class StatusFocusListener implements FocusListener { private int fieldID;