String control focus

[EliranMar3005]

Hi,

I wrote a program that emulates a simple calculator.
String control (String.c) for input and output and a number of operating controls.
I would like to do so, the String.c will be in focus all the time from starting the program.
I mean that, upon clicking on one of the other controls ('+' || '-' || '*' and so..) - Automatically I can enter a new input into the String.c without the need to click on the screen and create an Event_Comit.

I am sure that the possibility exists. I greatly appreciate guidance how to do it.

UIR attached.

Thank you!

Eliran

[Constantin--P]

Hello Eliran

You can use SetActiveCtrl for this purpose.

If you use a string control, when it gets focus the contents is selected which might not be desirable. If you relplace it with a text box you might get better results. Take care that SetCtrlVal on textboxes append text rather than replacing the text.

[RobertoBozzolo · Accepted solution]

Focus can be moved from the active control to another one by calling SetActiveCtrl function.

So the data flow of your application could be the following:

• Operator types into the string control (note: you need to limit typing to numbers only and optionally minus sign)
• When the user presses an operator key (i.e. '+') you receive a commit event from the string control on which you must read the control and save the value, next clear the string control. At the same time you receive a commit event on the '+' key, in which you must store somewhere the operation choosen and SetActiveCtrl the string control
• When the user presses '=' key you must read the string another time and perform calculation, outputting result to the string itself (note: you will receive a commit event from the string also: you can either handle that event to read the control value in a different variable from the previous event or do nothing and let the '=' key event handle all the matter)

It's ot a difficult task but requires a bit of attention to properly handle all events.