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180 Chapter 2: ActionScript Language Reference

The user can also specify permanent privacy settings for a particular domain by right-clicking

(Windows) or Control-clicking (Macintosh) while a SWF file is playing, selecting Settings,

opening the Privacy panel, and selecting Remember.

You can’t use ActionScript to set the Allow or Deny value for a user, but you can display the

Privacy panel for the user by using

System.showSettings(0). If the user selects Remember,

Flash Player no longer displays the Privacy dialog box for SWF files from this domain.

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. Create a new video instance by selecting

New Video from the Library options menu. Add an instance to the Stage and give it the instance

name

my_video. Add a Label component instance to the Stage and give it the instance name

camera_lbl, and a ComboBox component instance and give it the instance name cameras_cb.

Then add the following ActionScript to Frame 1 of the Timeline:

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);