Blackberry Smartphones Specifications download pdf (Page 23)

• Consider allowing touch screen and trackpad interactions to complement each other. For example, users can scroll to find

content using the touch screen and then use the trackpad to move the cursor to highlight a specific sentence.

• Allow combined touch screen and trackpad interactions, where appropriate. For example, in a game, when users move over

an object using a finger on the touch screen, they can click the trackpad to shoot the object.

Touch screen

On BlackBerry® devices with a touch screen, users can navigate and type text using the touch screen.

In most cases, an action occurs when users lift their finger off the touch screen, not when they touch the screen. However, when

users touch an item or touch and hold a finger on an item, the action occurs before users lift their finger.

Users can perform the following actions on a touch screen:

User action Event Result

Tap the screen. TouchGesture.TAP This action initiates an action. For example,

when users tap an email message in the

message list, the message opens. In most

cases, this action is equivalent to clicking the

trackpad.

Tap the screen twice quickly in

the same location.

TouchGesture.DOUBLE_TAP This action fits the content in a picture, HTML

email message, web page, or attachment

into the dimensions of the screen.

Touch an item. TouchEvent.DOWN

TouchEvent.UP

This action highlights an item.

On a toolbar or the virtual keyboard, this

action displays a tooltip.

Touch and hold a finger on an

item.

TouchGesture.HOVER If a pop-up menu is available, this action

opens the pop-up menu.

Drag a finger vertically. TouchEvent.MOVE This action scrolls and moves the content on

the screen. For example, on the Home

screen, users can move the rows of

applications up or down to display the

preferred number of applications on the

screen.

Drag a finger in any direction. TouchEvent.MOVE This action pans a picture, map, or web page.

UI Guidelines

Touch screen

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Blackberry Smartphones Specifications Page 23