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Eclipse Platform
Release 3.0

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org.eclipse.jface.action
Class ControlContribution

java.lang.Object
  org.eclipse.jface.action.ContributionItem
      org.eclipse.jface.action.ControlContribution

All Implemented Interfaces:

IContributionItem

public abstract class ControlContribution

extends ContributionItem

An abstract contribution item implementation for adding an arbitrary SWT control to a tool bar. Note, however, that these items cannot be contributed to menu bars.

The createControl framework method must be implemented by concrete subclasses.

Constructor Summary

protected

ControlContribution(String id) Creates a control contribution item with the given id.

Method Summary

protected int	computeWidth(Control control) Computes the width of the given control which is being added to a tool bar.
protected abstract Control	createControl(Composite parent) Creates and returns the control for this contribution item under the given parent composite.
void	fill(Composite parent) The control item implementation of this IContributionItem method calls the createControl framework method.
void	fill(Menu parent, int index) The control item implementation of this IContributionItem method throws an exception since controls cannot be added to menus.
void	fill(ToolBar parent, int index) The control item implementation of this IContributionItem method calls the createControl framework method to create a control under the given parent, and then creates a new tool item to hold it.

Methods inherited from class org.eclipse.jface.action.ContributionItem

dispose, fill, getId, getParent, isDirty, isDynamic, isEnabled, isGroupMarker, isSeparator, isVisible, saveWidgetState, setParent, setVisible, toString, update, update

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ControlContribution

protected ControlContribution(String id)

Creates a control contribution item with the given id.

Parameters:

id - the contribution item id

Method Detail

computeWidth

protected int computeWidth(Control control)

Computes the width of the given control which is being added to a tool bar. This is needed to determine the width of the tool bar item containing the given control.

The default implementation of this framework method returns control.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x. Subclasses may override if required.

Parameters:

control - the control being added

Returns:

the width of the control

createControl

protected abstract Control createControl(Composite parent)

Creates and returns the control for this contribution item under the given parent composite.

This framework method must be implemented by concrete subclasses.

Parameters:

parent - the parent composite

Returns:

the new control

fill

public final void fill(Composite parent)

The control item implementation of this IContributionItem method calls the createControl framework method. Subclasses must implement createControl rather than overriding this method.

Specified by:

fill in interface IContributionItem

Overrides:

fill in class ContributionItem

fill

public final void fill(Menu parent,
                       int index)

The control item implementation of this IContributionItem method throws an exception since controls cannot be added to menus.

Specified by:

fill in interface IContributionItem

Overrides:

fill in class ContributionItem

fill

public final void fill(ToolBar parent,
                       int index)

The control item implementation of this IContributionItem method calls the createControl framework method to create a control under the given parent, and then creates a new tool item to hold it. Subclasses must implement createControl rather than overriding this method.

Specified by:

fill in interface IContributionItem

Overrides:

fill in class ContributionItem