package bndtools.editor.common;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.custom.StackLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.forms.IDetailsPage;
import org.eclipse.ui.forms.IFormPart;
import org.eclipse.ui.forms.IManagedForm;
import org.eclipse.ui.forms.IPartSelectionListener;
import org.eclipse.ui.forms.widgets.FormToolkit;
public class SaneDetailsPart implements IFormPart, IPartSelectionListener {
private StackLayout stack;
private Composite deselectedPanel;
private IManagedForm managedForm;
private FormToolkit toolkit;
private Composite parent;
private final Map<Class< ? >,IDetailsPage> pageMap = new HashMap<Class< ? >,IDetailsPage>(3);
private final Map<Class< ? >,Control> controlCache = new HashMap<Class< ? >,Control>(3);
private IDetailsPage deselectedPage = null;
private IDetailsPage currentPage = null;
private ISelection currentSelection;
private IFormPart masterPart;
public void registerPage(Class< ? > clazz, IDetailsPage page) {
pageMap.put(clazz, page);
page.initialize(managedForm);
}
public void registerDeselectedPage(IDetailsPage page) {
this.deselectedPage = page;
}
public void createContents(FormToolkit toolkit, Composite parent) {
this.toolkit = toolkit;
this.parent = parent;
stack = new StackLayout();
parent.setLayout(stack);
deselectedPanel = toolkit.createComposite(parent);
// deselectedPanel.setBackground(new Color(parent.getDisplay(), 255, 0,
// 0));
if (deselectedPage != null)
deselectedPage.createContents(deselectedPanel);
stack.topControl = deselectedPanel;
}
public void selectionChanged(IFormPart part, ISelection selection) {
masterPart = part;
currentSelection = selection;
Class< ? > clazz = null;
if (selection instanceof IStructuredSelection) {
Object selected = ((IStructuredSelection) selection).getFirstElement();
if (selected != null)
clazz = selected.getClass();
}
showPage(clazz);
}
void showPage(Class< ? > clazz) {
IDetailsPage oldPage = currentPage;
currentPage = clazz != null ? currentPage = pageMap.get(clazz) : null;
// Save data from old page
if (oldPage != null && oldPage.isDirty())
oldPage.commit(false);
// Show control
Control control;
if (currentPage == null) {
control = deselectedPanel;
} else {
control = controlCache.get(clazz);
if (control == null) {
Composite composite = toolkit.createComposite(parent);
controlCache.put(clazz, composite);
currentPage.createContents(composite);
control = composite;
}
currentPage.selectionChanged(masterPart, currentSelection);
}
stack.topControl = control;
parent.layout();
// Refresh
if (currentPage != null && currentPage.isStale())
currentPage.refresh();
}
public void commit(boolean onSave) {
if (currentPage != null)
currentPage.commit(onSave);
}
public void dispose() {
for (Class< ? > key : pageMap.keySet()) {
controlCache.remove(key);
IDetailsPage page = pageMap.get(key);
page.dispose();
}
}
public void initialize(IManagedForm form) {
this.managedForm = form;
}
public boolean isDirty() {
boolean dirty = currentPage != null && currentPage.isDirty();
return dirty;
}
public boolean isStale() {
return currentPage != null && currentPage.isStale();
}
public void refresh() {
if (currentPage != null)
currentPage.refresh();
}
public void setFocus() {
if (currentPage != null)
currentPage.setFocus();
}
public boolean setFormInput(Object input) {
return false;
}
}