Interactive Control and Callbacks

Writing programs that respond to user actions, such as mouse clicks

Functions

`uicontextmenu`	Create context menu component
`uimenu`	Create menu or menu items

`dragrect`	Drag rectangles with mouse
`rbbox`	Create rubberband box for area selection

`refresh`	Redraw current figure
`shg`	Show current figure

Callbacks — Programmed Response to User Action
Acallbackis a function that executes in response to some predefined user action, such as clicking on a graphics object or closing a figure window.
Callback Definition
To use callback properties, assign the callback code to the property.
Capturing Mouse Clicks
There are two properties that determine if and how objects respond to mouse clicks,PickablePartsandHitTest.
Button Down Callback Function
Button down callbacks execute when users left-click on the graphics object for which the callback is assigned.
Define a Context Menu
This example shows how to define a context menu, which enable you to provide choices to users for interaction with graphics objects.
Define an Object Creation Callback
This example shows how to define an object creation callback.
Define an Object Deletion Callback
This example shows how to define an object deletion callback.
Pass Mouse Click to Group Parent
这个例子展示了如何可以通过一组对象a mouse click to a parent, which operates on all objects in the group.
Pass Mouse Click to Obscured Object
This example shows how to pass mouse clicks to an obscured object.