Various - Touch Regions; Graphic Composer

[[email protected]]

Just starting with gen4-ulcd-70dct in a serial environment. The serial manual refers to 'Graphic Composer software'. Where is it? I will want to display images on the screen and it looks like I need this software.
Another question - I need to detect touch from several positions on the screen (several buttons). There is a command there to set a 'touch detect region' and 'touch_get'. Can I set several regions at the same time and how will I know from which region (or from which button) is the touch event?

[John Kevin]

Hi,

The serial manual refers to 'Graphic Composer software'. Where is it?

The Graphic Composer (GC.EXE) is located in the Workshop4 directory DEP folder.
C:\Program Files (x86)\4D Labs\4D Workshop 4 IDE\DEP

Can I set several regions at the same time

You could only set one active region on the screen

I need to detect touch from several positions on the screen

You could get the status of the touch then check for the x and y coordinate if it is within the area of the button. You could do this as follows:
- Touch Set (mode = 0) -> Enable touch
- Touch Get (mode = 0) -> Get the status (e.g. no touch, touch pressed, released, or moving)
- Touch Get (mode = 1) -> Get the x-coordinate of the touch area
- Touch Get (mode = 2) -> Get the y-coordinate of the touch area

I hope it helps.

Best Regards,
Kevin

[[email protected]]

Hi Kevin,
Thanks for the GC.exe, found it. The touch problem is, however, not clear. I have say 4 buttons on the screen and the user can press any one of them at any time - and I have to detect it.
I take it there is not 'interrupt' which would alert me that a button was pressed? So is this how it's done:
- Touch Set (mode = 0) -> Enable touch
| do
| do
| - Touch Get (mode = 0) -> Get the status (e.g. no touch, touch pressed, released, or moving)
| loop until touch detected then
| - Touch Get (mode = 1) -> Get the x-coordinate of the touch area
| - Touch Get (mode = 2) -> Get the y-coordinate of the touch area
| loop forever

That seems very inefficient way.

Regards,
Mike

[John Kevin]

Hi Mike,

Thanks for your reply. Yes, that is correct. You could do it this way

- Touch Set (mode = 0) -> Enable touch
repeat
- Touch Get (mode=0)
if(1)//pressed
Touch Get (mode=1) //get x-coordinate
Touch Get (mode=2) //get y-coordinate
endif
forever


Or if you are checking for the buttons positions:

- Touch Set (mode = 0) -> Enable touch
repeat
- Touch Get (mode=0)
if(1)//pressed
if (Touch Get (mode=1) == (button x-pos) && Touch Get (mode=2) == (button y-pos) )
endif
forever

Best Regards,
Kevin