Overwriting of numbers when counter is increment or decrement

[DMane]

Counter is increment or decrement by pressing button the initial value is remain on text​ box and new value is overwrite on previous value. How to solve overwriting issue. 

[Anders Nedergaard PETERSEN]

Please ensure that you have invalidated the text widget after modifying the content of the buffer.

    // Update tick text and invalidate text area,
    // which will result in it being redrawn.
    Unicode::snprintf(tickTxtBuffer, 5, "%d", tick);
    tickTxt.invalidate();

You could also have a look at our Text Example UI available from the TouchGFX Designer as an UI Template

[DMane]

Thanks for your suggestion but I have already done this process but still I gating the overwriting issue so kindly suggest any other method to solve my issue.

[Anders Nedergaard PETERSEN]

Hi @DMane​,

I understand your issue correct, it is when increasing or decreasing a number on screen, digits some times remain?

It might help by taking a look at the Button Example from the TouchGFX Designer.

/Anders

[DMane]

So which type of button to use increasing and decreasing the number on screen and what type of interaction given to that button please suggest me.

[Anders Nedergaard PETERSEN]

The button used is a normal button in TouchGFX.

In the designer, a "Call new virtual function" is connected to the button as an interaction.

In the screenview.cpp file the following code is executed as a callback when the button is pressed

void MainView::increaseValue()
{
    if (count < 42)
    {
        count++;
        setCount(count);
 
        if (count == 42)
        {
            setLimitEffects(false, true);
        }
        else if (count == 1)
        {
            setLimitEffects(true, true);
        }
    }
}

/Anders

[DMane]

As per your solution I solve that Overwriting issue but I have another issue with my STM32F746G Discovery Board.
when I run my program on Discovery Board display image appears like crashes without colour I attached photo image.
So why this display showing that type of image please guide me about this issue.
please find attachment
.

[Anders Nedergaard PETERSEN]

Hi @DMane​,

It seems that the system did not correctly attach your documents, please reattach than again.

/Anders

[DMane]

Can you please look into attached image on simulator and on hardware.
Thanks,

[DMane]

I have another issue from my STM32F746G Discovery Board
when I run the program the display showing image overwrite on previously run program image .
How to solve that overwriting issue please suggest me