This lesson guides you through the steps of creating the Java™ class that is needed to handle
the customized open menu.
About this task
The menu you will create is a collection of actions, separators,
and action groups that contain a smaller collection of actions. For
this exercise, you will create a class, MainActionGroup that
makes up the menu. You will also create another class, OpenActionGroup that
overrides the default open group option.To create these classes:
Procedure
- You start with the
OpenActionGroup class,
since the MainActionGroup class needs a custom open
group. In the Package Explorer view, right-click
on thecom.ibm.carma.plugin.view Eclipse plug-in project
that you have modified from Exercise 5, and select New > Package.
- In the New Java Package dialog box
that opens enter,
menu, as the name of the package,
and click Finish.
- Now, create the Java class.
Right click the
menu package,
and select New > Class.
The New Java Class dialog box opens.
- Enter CustomOpenActionGroup as the
name of the class.
- Click the Browse button to the right
of the Superclass text field. In the Superclass
Selection dialog box that opens, enter the filter text, OpenActionGroup.
Select the class that is part of the
com.ibm.carma.ui.view package,
and click OK.
- Click Finish to close the New
Java Class dialog box and create the class.
- You want to override the
fillContextMenu method
to provide the custom content of the open section of the menu. For
the open section of the menu, you need to display everything but the Open and Open
With menu selections. The easiest way to do this is to
get the default from OpenActionGroup section and
remove the Open and Open With menu
selections. The following pseudocode demonstrates this:
get the default items;
for each item
{
if(item is open or open with)
{
remove it from the list;
}
}
Use the following sample code to implement this functionality:
public void fillContextMenu(IMenuManager menu)
{
super.fillContextMenu(menu);
IContributionItem[] myItems = menu.getItems();
for(int i = 0; i < myItems.length; i++)
{
IContributionItem item = myItems[i];
if(item.getId() != null)
{
if(item.getId().equals(OpenAction.ID) || item.getId().equals("com.ibm.carma.ui.openWithSubMenu"))
{
menu.remove(item);
}
}
}
}
- Automatically import any needed packages and classes. Ensure
that all of the following are imported:
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.IMenuManager;
import com.ibm.carma.ui.action.OpenAction;
import com.ibm.carma.ui.view.OpenActionGroup;
- Save the source and debug any errors.
