Bug 36446 [Contributions] widgets: Associating Actions with Buttons
Actions can be associated with Menu items , and tool bar items using MenuManager and ToolBarManager but there is not way to associate Action with a regular button and obtaining a reference to that button the closest thing is creating an ActionContributionItem with the desired action in its constructor , then filling the parent composite with ActionContributionItem.fill(Control parent) this creats the button , but it doesn't return a reference to that button , so for example i can't give it any layout data i suggest the ActionContributionItem.fill(Control parent) returns the created widget
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ActionContributionItem.java
}
				if (action.getStyle() == IAction.AS_RADIO_BUTTON) {
					flags = SWT.RADIO;
				}
			}
			Button b = new Button(parent, flags);
			b.setData(this);
			b.addListener(SWT.Dispose, getButtonListener());
			
			b.addListener(SWT.Selection, getButtonListener());
			if (action.getHelpListener() != null) {
				b.addHelpListener(action.getHelpListener());
			}
			widget = b;
			update(null);
			
			action.addPropertyChangeListener(propertyListener);
			if (action != null) {
				String commandId = action.getActionDefinitionId();
				ExternalActionManager.ICallback callback = ExternalActionManager
						.getInstance().getCallback();
				if ((callback != null) && (commandId != null)) {
					callback.addPropertyChangeListener(commandId,
							actionTextListener);
				}
			}
		}
	}
	/**
	 * The <code>ActionContributionItem</code> implementation of this