Best Practice: Implementing Touch Screen Actions; Keyboard - Blackberry 9620 Ui Manuallines

UI Guidelines
User action
Pinch out or pinch in.

Best practice: Implementing touch screen actions

• Where possible, create a target area for UI elements that is 7 mm high. At a minimum, the target area should be at least
5.5 mm high.
• Provide enough space around components so that users can easily touch the screen with their fingertips to initiate a
specific action.
• If you design a UI for BlackBerry devices with a touch screen and you want your application to work on BlackBerry
devices with a trackpad only, make sure that each touch screen action has an associated trackpad action. Test the
interactions in your application on BlackBerry devices using a touch screen and a trackpad. The following information
matches touch screen actions and trackpad actions:
User goal
Initiate an action.
Scroll.
Move to the next or
previous item.
Zoom.
Zoom to fit.
Pan a zoomed image.
Display a pop-up menu.

Keyboard

Depending on the BlackBerry device model, users can type text, numbers, or symbols using a physical keyboard, virtual
keyboard, or both.
Physical keyboard
A physical keyboard provides users with a keyboard that is similar in layout to the keyboard on a computer, except that
numbers and symbols are located in different places.
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Result
These actions zoom in to and out from an item.
Touch screen action
Tap the screen.
Drag a finger vertically on the screen.
Swipe across the screen.
Pinch out or pinch in.
Tap the screen twice quickly.
Drag a finger on the screen.
Touch and hold a finger on the screen.
Trackpad action
Click the trackpad.
Move a finger on the trackpad to move the
highlight.
Swipe across the trackpad in the opposite
direction.
Click the trackpad.
—
Move a finger on the trackpad in the opposite
direction.
Click and hold the trackpad.
Interactions