母項有建構環境定義的數個選項:
/** * 示範如何用預設環境定義 * 預設的來建立兩個巢狀子項的視圖。 */public class DefaultContextView { public DefaultContextView(Composite parent, IPartFactory
factory) throws CoreException { // 建立資源導覽器 ContainerContext viewContext1
= new ContainerContext(); ISite view1 = factory.createView(
IPageLayout.ID_RES_NAV, parent, viewContext1, null); // 建立內容視圖 ContainerContext viewContext2
= new ContainerContext(); ISite view2 = factory.createView(IPageLayout.ID_PROP_SHEET,
parent, viewContext2, null); parent.setLayout(new FillLayout());
}}public class RedirectContextView { /** * 元件建構子。不要直接呼叫。 */ public RedirectContextView(Composite parent, IPartFactory
factory, ISelectionHandler selection, IActionBars actionBars) throws CoreException
{ // 建立資源導覽器。
直接將導覽器的選項重新導向到我們的母項。 ContainerContext viewContext1
= new ContainerContext() .addInstance(ISelectionHandler.class,
selection); ISite view1 = factory.createView(
IPageLayout.ID_RES_NAV,
parent, viewContext1, null); // 建立內容視圖。容許內容視圖直接使用我們的動作列。 ContainerContext viewContext2
= new ContainerContext() .addInstance(IActionBars.class,
actionBars); ISite view2 = factory.createView(IPageLayout.ID_PROP_SHEET,
parent, viewContext2, null); parent.setLayout(new FillLayout());
}}public class OverrideInstanceView {
/**
* 元件建構子。不要直接呼叫。
*/
public OverrideInstanceView(Composite parent, IPartFactory
factory, final INameable name) throws CoreException {
ContainerContext viewContext1 = new
ContainerContext();
// 將 ISelectionHandler 新增到視圖的環境定義中。一旦視圖變更它的選項,
// 便會在內容說明中顯示所選項目的數量。
viewContext1.addInstance(ISelectionHandler.class,
new ISelectionHandler() {
/* (非 Javadoc)
* @請參閱
org.eclipse.ui.part.services.ISelectionHandler#setSelection(org.eclipse.jface.viewers.ISelection)
*/
public void
setSelection(ISelection newSelection) {
if (newSelection instanceof IStructuredSelection) {
IStructuredSelection sel = (IStructuredSelection)newSelection;
int selectionSize = sel.size();
name.setContentDescription(MessageFormat.format("{0} problems selected",
new String[] {Integer.toString(selectionSize)}));
}
}
});
// 建立問題視圖
ISite view1 = factory.createView(
IPageLayout.ID_PROBLEM_VIEW, parent, viewContext1, null);
// 建立內容視圖
ContainerContext viewContext2 = new
ContainerContext();
ISite view2 = factory.createView(IPageLayout.ID_PROP_SHEET,
parent, viewContext2, null);
parent.setLayout(new FillLayout());
}
}