Capacity Touch Panel
– True multi-touch panel with finger (The multi-finger position is exact)
– Fake multi-touch panel with finger (The multi-finger position maybe wrong, you could use gesture only)
• The red is actual finger position, the blue is the position driver sends to MMI
▪ Resistance Touch Panel
– Just Single touch with pen or finger
▪ How to know the touch panel category?
– Just refer to project makefile to check
TOUCH_PANEL_SUPPORT
– True multi-touch panel
• TOUCH_PANEL_SUPPORT = CTP_XXX_TRUE_MULTIPLE
– Fake multi-touch panel
• TOUCH_PANEL_SUPPORT = CTP_XXX_FAKE_MULTIPLE
– Common compile option
• __TOUCH_PANEL_CAPACITY__
▪ Resistance Touch Panel
– TOUCH_PANEL_SUPPORT = TP_INTERNAL
Touch event mode
▪ Default behavior is Single touch mode: we just send the first finger position to the proc.
▪ Handwriting is always single mode.
▪ Multi-Mode is valid by call mmi_frm_set_touch_mode(…), we will send all the fingers position to the proc (at most five)
▪ Usage:
▪ mmi_frm_set_touch_mode(mmi_frm_touch_mode mode)
Finger id identifies if the event is a new finger
▪ For example:
– finger 1 down the id is 1, finger 2 down the id is 2, when finger 1 up and then finger 1 down, its id is 3
– area is for factory mode to test the touch panel.
When there are sequential move events, we will send several move events together to the proc
– For example: Finger 1 touch data, merge_num =2, so we will send 2 move events to the proc, these events are in merge_points(not include the current position).
