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());
}
}