Problem with wildcard in textarea..

[EMir.1]

Hello everybody,

i create a project using TouchGFX 4.18 to read temperature.

When a button is pressed i create a routine that read temperature from a sensor and show this in a text area inside a container.

In TouchGFX i create a wildcard in texarea with buffer size 10 and default value 25.0

Here below the code...about the View.cpp

void MainView::toggle_singleReadButtonPressed()

{

float temp=0.0;

mysensor_Read_Data_Sensor(&temp); //routine that read temperature

  textArea_WC_TEMP.setWildcard(textArea_WC_TEMPBuffer);

//  add(textArea_WC_TEMP); //commented not function correctly

  if (temp >0.0)

  { Unicode::snprintfFloat(textArea_WC_TEMPBuffer, 10, "%+4.2f", temp);

  }

  else

  { Unicode::snprintfFloat(textArea_WC_TEMPBuffer, 10, "%-4.2f", temp);

  }

textArea_WC_TEMP.invalidate();

}

the textArea_WC_TEMP object is create in tha MainViewBase class created by TouchGFX and i see it inside the file .hpp.

I follow the example in tutorial :

https://support.touchgfx.com/4.18/docs/development/ui-development/touchgfx-engine-features/texts-and-fonts

But the add function create the effect the the micro goes in hang...

so remove it but i see strange chars on the screen..

I check the buffer filled with snprintfFloat and it is correct..

Why appear ? characters on the screen???

There aren't these chars in the buffer... i attach the image

What happen?

Someone have the some problem?

Thanks

Enal

[MM..1]

Beginers repeat this error ... your font dont have all characters , but only used or defined, all other is showed as ? default.

Add to font 0..9 or any chars you plan use from code.

[EMir.1]

Hi MM..1,

I add a text area.. so i usually expect to fill the text area with every chars available on the keyboard..

But i read that is not so.. it's strange.

I update the char field follow your advice and now it is correct!

Anyway thanks

Bye

Enal