Key, behavior as "on click"

[powersoft]

In this part I draw some keys to the screen.
Is it posible to change the code in such a way that when I pressed a key only one event is generated?
When I push the key now the values will be added for a couple of times.
Would like the behaviour "on click => change the value"

Thanks for any help 







/* draw buttons*/
 GD.ColorRGB(WHITE);
 GD.Tag(1); //-1
 GD.cmd_button( 50,200,50,25,27,OPT_CENTER,"-1");
 GD.Tag(2); //-10
 GD.cmd_button(105,200,50,25,27,OPT_CENTER,"-10");
 GD.Tag(3); //-100
 GD.cmd_button(160,200,50,25,27,OPT_CENTER,"-100");

 GD.Tag(4); //+1
 GD.cmd_button(250,200,50,25,27,OPT_CENTER,"+1");
 GD.Tag(5); //+10
 GD.cmd_button(305,200,50,25,27,OPT_CENTER,"+10");
 GD.Tag(6); //+100
 GD.cmd_button(360,200,50,25,27,OPT_CENTER,"+100");

 GD.Tag(7); //quit
 GD.cmd_button(410,240,60,25,27,OPT_CENTER,"QUIT");

 GD.swap();
 GD.get_inputs();
 if (GD.inputs.tag > 0)
 {
   Serial.print("tag : ");
   Serial.println(GD.inputs.tag);
 }
 if (GD.inputs.tag == 1) actual_unixtime -=   1;
 if (GD.inputs.tag == 2) actual_unixtime -=  10;
 if (GD.inputs.tag == 3) actual_unixtime -= 100;
 if (GD.inputs.tag == 4) actual_unixtime +=   1;
 if (GD.inputs.tag == 5) actual_unixtime +=  10;
 if (GD.inputs.tag == 6) actual_unixtime += 100;
}


[jamesbowman]

Right, the tag byte is a lot like a switch press before debouncing. The GD3 just reports continuous presses, and the host needs to filter out the button press event.


What I normally do is to keep a static variable holding the previous tag result.

static byte prev_tag;
Then detecting a "first press" has an extra check that the previous tag was zero:

 GD.get_inputs();
 if (prev_tag == 0) {
   if (GD.inputs.tag > 0)
   {
     Serial.print("tag : ");
     Serial.println(GD.inputs.tag);
   }
   if (GD.inputs.tag == 1) actual_unixtime -=   1;
   if (GD.inputs.tag == 2) actual_unixtime -=  10;
   if (GD.inputs.tag == 3) actual_unixtime -= 100;
   if (GD.inputs.tag == 4) actual_unixtime +=   1;
   if (GD.inputs.tag == 5) actual_unixtime +=  10;
   if (GD.inputs.tag == 6) actual_unixtime += 100;
 }
 prev_tag = GD.inputs.tag;