User Guide

498 Chapter 7: ActionScript for Flash

If Camera.get returns null, either the camera is in use by another application, or there are no

cameras installed on the system. To determine whether any cameras are installed, use

Camera.names.length. To display the Flash Player Camera Settings panel, which lets the user

choose the camera to be referenced by

Camera.get(), use System.showSettings(3).

Scanning the hardware for cameras takes time. When Flash finds at least one camera, the

hardware is not scanned again for the lifetime of the player instance. However, if Flash doesn’t

find any cameras, it will scan each time

Camera.get is called. This is helpful if a user has

forgotten to connect the camera; if your SWF file provides a Try Again button that calls

Camera.get, Flash can find the camera without the user having to restart the SWF file.

Example

The following example lets you select an active camera to use from a ComboBox instance. The

current active camera is displayed in a Label instance.

var my_cam:Camera = Camera.get();

var my_video:Video;

my_video.attachVideo(my_cam);

var camera_lbl:mx.controls.Label;

var cameras_cb:mx.controls.ComboBox;

camera_lbl.text = my_cam.name;

cameras_cb.dataProvider = Camera.names;

function changeCamera():Void {

my_cam = Camera.get(cameras_cb.selectedIndex);

my_video.attachVideo(my_cam);

camera_lbl.text = my_cam.name;

}

cameras_cb.addEventListener("change", changeCamera);

camera_lbl.setStyle("fontSize", 9);

cameras_cb.setStyle("fontSize", 9);