How to add a pulldown button in a view's toolbar? - eclipse-plugin

Question

I need to add a pulldown button to a view's toolbar in an Eclipse plugin.
Actually buttons in the toolbar are added like that :
<extension point="org.eclipse.ui.viewActions">
<viewContribution id="..." targetId="$MyViewId$">
<action id="..."
toolbarPath="action1"
class="Class extending Action and implementing IViewActionDelegate">
</action>
</viewContribution>
</extension>

Answer 1

I've figured it out. Two ways: one using org.eclipse.ui.viewActions extension, the other with org.eclipse.ui.menus
Using org.eclipse.ui.viewActions extension (eclipse >= 3.5)
action's style must set to pulldown
<extension point="org.eclipse.ui.viewActions">
<viewContribution id="..." targetId="$MyViewId$">
<action id="..."
toolbarPath="action1"
class="xxx.MyAction"
style="pulldown">
</action>
</viewContribution>
</extension>
action class must implement IViewActionDelegate (required for an action contributing to a view toolbar) and IMenuCreator (defines the menu behavior).
public class RetrieveViolationsViewActionDelegate implements IViewActionDelegate, IMenuCreator
{
private IAction action;
private Menu menu;
// IViewActionDelegate methods
...
// IMenuCreator methods
public void selectionChanged(IAction action, ISelection selection)
{
if (action != this.action)
{
action.setMenuCreator(this);
this.action = action;
}
}
public void dispose()
{
if (menu != null)
{
menu.dispose();
}
}
public Menu getMenu(Control parent)
{
Menu menu = new Menu(parent);
addActionToMenu(menu, new ClassImplemententingIAction());
return menu;
}
public Menu getMenu(Menu parent)
{
// Not use
return null;
}
private void addActionToMenu(Menu menu, IAction action)
{
ActionContributionItem item= new ActionContributionItem(action);
item.fill(menu, -1);
}
}
Using org.eclipse.ui.menus (eclipse >= 3.3)
Add a new menucontribution to the org.eclipse.ui.menus extension point.
Set the location URI to toolbar:IdOfYourView
Add a toolbar to this extension and a new command to this new toolbar.
Change the command style to pulldown
Create a new menucontribution and set the locationURI to menu:IdOfThePullDownCommand
Add commands to this menu.
More info