ACE components were originally intended for a desktop environment. Certain desktop UI interactions map consistently to UI interactions on mobile devices. Other desktop interactions either don't have any correspondence in the mobile environment, or don't have agreed-upon corresponding interactions among mobile platforms, OS's, browsers or apps. Below are some examples:
| right click
|| commonly touch and hold, but context menu usually "hijacked" by some other menu or functionality
| mouseover & mouseout
|| no such thing as fingerover or fingerout
| ctrl-click & shift-click
|| generally no such thing; some device or app. may provide extra key to do ctrl/shift-tap
| drag & drop
|| mousedown, mousemove, mouseup map consistently to touchstart, touchmove and touchend
On mobile devices, currently ACE components should support UI interactions that have consistent mapping to UI interactions on a desktop. From the above table, for example, click and drag & drop should be supported.
There are certain things you have to particularly watch out for when interacting on a mobile device:
- Drag should happen ASAP after touch, or event might become a touch and hold.
- When dragging table column headers, touch should be on blank space, not the header text.
- When dragging in slider, make sure focus is on the knob (normally color changes as controlled by CSS), not the whole slider.
- On Samsung device, the touch on a resizable has to be a little more "off" the resize handle than on iPhone and iPad.