MUI - one button - two different jumps (destination pages)?

[ViacheslavK9]

Hello, Oliver!
Forgot to say, happy new year!

i know it's too many questions, but maybe your tech will bring much more with this info for others.

So, my question is - do you think it's possible to have one button on a form with different assigned form depending on a condition?
I am looking onto that because don't want to duplicate form,
which is accessible from the two different branches on a menu tree.

Thanks!

[olikraus]

do you think it's possible to have one button on a form with different assigned form depending on a condition?

Sure, why not. The key-event mapping is anyways made by the mui use, so it would be easy to add any condition.

(created issue: #2356)

[ViacheslavK9]

i guess construction like

MUIF_BUTTON("TR", mui_u8g2_btn_goto_wm_fi), MUI_XYAT("TR", 25, 56, 52, " Do test ")

didnt help me, because we directly writing form number in a definition of the object.
Did not find any example on something like "OnPushButton" trigger behavior,
maybe you can help? Tx..

[olikraus]

Each MUI program needs a button event procedure like this:

u8g2/sys/arduino/u8g2_page_buffer/MUIInput2BtnBounce2/MUIInput2BtnBounce2.ino

Lines 516 to 526 in c4f9cd9

	void handle_events(void) {
	// 0 = not pushed, 1 = pushed
	if ( selectBtn.pressed() ) {
	mui.sendSelect();
	is_redraw = 1;
	}
	else if ( nextBtn.pressed() ) {
	mui.nextField();
	is_redraw = 1;
	}
	}

My idea was to extend this procedure with something like this:

   if ( selectBtn.pressed() ) { 
     if ( isSpecialActionRequired ) {
        // user has pressed select, do something special
     } else {
       mui.sendSelect(); // normal MUI behavior
       is_redraw = 1; 
     }
   }  

Note, that also some button libs support long button press, which might be useful, if you have only one button.

For the above Bounce2 lib, there is at least a previousDuration()/currentDuration() which might allow you to check how long the button was pressed (https://github.com/thomasfredericks/Bounce2). But I am not an expert on Bounce2... you need to figure out by yourself if this might help, but an example for a one button code could look like this:

   if ( selectBtn.pressed() ) { 
     if ( selectBtn.previousDuration() > 300 ) { // long press
       mui.sendSelect(); 
       is_redraw = 1; 
     } else {
       mui.nextField(); 
       is_redraw = 1; 
     }
   }  

... not tested

[olikraus]

And of course, instead of "mui.sendSelect()" you could also jump to a specific menu.
So for example, if the user presses this long button press, then use "mui.gotoForm()" (https://github.com/olikraus/u8g2/wiki/muiref#gotoform) to directly jump to a specific form.

[olikraus]

I have created and tested a MUI menu with only one button and Bounce2 lib: https://github.com/olikraus/u8g2/blob/master/sys/arduino/u8g2_page_buffer/MUIInput1BtnBounce2/MUIInput1BtnBounce2.ino

There was a little change required: Instead of Bounce2.pressed() function we must use the Bounce2.released() function.

But all in all it works nicely with only one button:

u8g2/sys/arduino/u8g2_page_buffer/MUIInput1BtnBounce2/MUIInput1BtnBounce2.ino

Lines 513 to 522 in 8430f65

	void handle_events(void) {
	// 0 = not pushed, 1 = pushed
	if ( selectBtn.released() ) {
	if ( selectBtn.previousDuration() < 200 )
	mui.sendSelect(); // short button press
	else
	mui.nextField(); // long button press
	is_redraw = 1;
	}
	}

#2357

[ViacheslavK9]

Thank you very much, Oliver! My Project is on pause for now, but your answers were very helpfull. 👍