Touch screen UI Principle

POS industry started adopting touch screen UI for many days.  However there were no standard among touch screen based software developers. Its important to consider size, nature and features of UI elements so that UI does not turn into bottleneck. While updating our design, we learned many of the existing POS are not touch screen friendly at all. Here are some criteria we followed.

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Accessibility

Buttons are spaced and should not be crowded. Small Square buttons used in mouse driven UI are not suitable for touch UI.

No tooltips

The touch screen interface design engineer must remember that ToolTips and Hovers are absolutely useless in touch screen systems. These tools are very handy when passing the mouse pointer over to an object or graphical element, which highlights upon contact or a ToolTip pop up appears. In a touch screen system, however, these are useless because when the user touches the graphical element directly it activates without any roll-over effect. Therefore these tools should not be considered in graphical interface designs created exclusively for touchscreen systems. In a touch screen system it must be clear to the user what can be touched, manipulated, dragged, etc., and what cannot be touched without relying on the mouse to pass over it.

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Target Area

Research indicates that the minimum target area for efficient, accurate interaction using a finger is 6×6 millimeters (mm). This area translates to layout metrics as follows:

  1. Use natural interactions
  2. Size interactive elements adequately
  3. Keep wandering hands in mind & hands covering important interface elements when they shouldn’t be.

 

Floreant interface was designed keeping in mind these restrictions: positioning information so that it does not get covered by hands when needed.

 

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Textual inputs

Even with the best graphical interface, users may often have to type numeric values and text strings with precision (i.e. set points, log-in and password), and the input from the keyboard onto the touchscreen interface should be placed where most efficient for the user.

Have been using it for over an year now and the POS System is just amazing. if you are looking for a Restaurant POS i would absolutely recommend using Floreant POS”

– Blongo, Sourceforge Review