Blackberry BROWSER VERSION 4.7.0 - FUNDAMENTALS GUIDE Основы - Страница 6
Просмотреть онлайн или скачать pdf Основы для Программное обеспечение Blackberry BROWSER VERSION 4.7.0 - FUNDAMENTALS GUIDE. Blackberry BROWSER VERSION 4.7.0 - FUNDAMENTALS GUIDE 42 страницы.
Печатать страницуFundamentals Guide
BlackBerry Device Software version considerations
The BlackBerry® Browser is a BlackBerry® Device Software application that is included with every BlackBerry device. The version
of the BlackBerry Device Software that is running on theBlackBerry device determines what content the BlackBerry Browser
supports and how the content is rendered.
Two generations of the BlackBerry Browser exist.
•
The first generation of the BlackBerry Browser, included with BlackBerry Device Software version 4.5 or earlier, supports
simple web page presentations and wireless-specific content very well. In BlackBerry Device Software version 3.8 or later,
the BlackBerry Browser provides basic JavaScript® and CSS support. In an effort to make more of the web accessible to the
BlackBerry Browser, support for more complex presentation formats has been added over a number of releases. However,
the first generation of the BlackBerry Browser focuses on managing and mitigating the effects of the wireless network.
•
The second-generation BlackBerry Browser was introduced in BlackBerry Device Software version 4.6. The BlackBerry
Browser rendering agent and JavaScript engine were completely redesigned to provide much greater support of existing
web standards. With full support for standards such as HTML 4.01, CSS 2.1, and DOM Level 2, the second generation of the
BlackBerry Browser has the ability to render most existing web content.
You should consider the BlackBerry Browser that is included with BlackBerry Device Software version 4.6 or later as functionally
distinct from the first generation of the BlackBerry Browser that is included with earlier BlackBerry Device Software versions.
When you design content for the BlackBerry device, you need to decide the version or versions of the BlackBerry Device Software
to target. Keep in mind that the number of BlackBerry device users who use a first generation BlackBerry Browser to access your
content is likely to be much larger than the number of users with a second generation of the browser. If you want to create content
that makes use of the presentation and scripting support offered by the second generation of the BlackBerry Browser, consider
also providing simplified content that targets BlackBerry device users who are browsing with a first generation of the BlackBerry
Browser.
For more specific information about what is supported with each version of the BlackBerry Device Software, see the BlackBerry
Browser HTML Reference, the BlackBerry Browser CSS Reference and the BlackBerry Browser JavaScript Reference.
Trackball
On BlackBerry® devices with a trackball, the trackball is the primary control for user navigation. Users can
•
roll the trackball to move the cursor
•
click the trackball to perform default actions or open a context menu
•
click the trackball while pressing the Shift key to select objects
BlackBerry devices with a trackball also include a Menu key that is located to the left of the trackball. Users can press the Menu
key to open a full menu of available actions.
4
Characteristics of BlackBerry devices