textArea.invalidate(); makes my textArea disappear

[Rust]

Hello there,

i'm using touchgfx to show time data using

touchgfx::Unicode::snprintf(textArea1Buffer, TEXTAREA1_SIZE, "%d", sec);

but when I use invalidate() function to refresh the text area, the text disappear from my screen;

instead, the code  getRootContainer().invalidate(); works well and make things correct.

by the way, the code using textArea1.invalidate(); can shown on TouchGFX simulator, it just doesn't work on my F411CEU6

here is my code:

uint16_t count = 0;
uint16_t sec = 0;
void Clock_screenView::handleTickEvent()
{
	touchgfx::Rect Rect1;
	if(count > 33)
	{
		touchgfx::Unicode::snprintf(textArea1Buffer, TEXTAREA1_SIZE, "%d", sec);
	    textArea1.invalidate();
	    //getRootContainer().invalidate();
		count=0;
		sec++;
	}
	else
	{
		count++;
	}
}

Is there anyone, who can explain this phenomena?

Best regards

Rust

[Rust]

I think I found the reason...

I think the textArea1's rect struct can not be set correctly, after the setXY(), its rect still is {0, 0, 0, 0}

and its parent class Drawable's rect also is {0, 0, 0, 0}; 

getRootContainer().invalidate(); could work because it has rect indicates the whole screen.

these code generated by touchgfx automaticly.

Clock_screenViewBase::Clock_screenViewBase()
{
    __background.setPosition(0, 0, 240, 135);
    __background.setColor(touchgfx::Color::getColorFromRGB(0, 0, 0));
    add(__background);

    textArea1.setXY(77, 57);
    textArea1.setColor(touchgfx::Color::getColorFromRGB(0, 255, 0));
    textArea1.setLinespacing(0);
    Unicode::snprintf(textArea1Buffer, TEXTAREA1_SIZE, "%s", touchgfx::TypedText(T___SINGLEUSE_HH39).getText());
    textArea1.setWildcard(textArea1Buffer);
    textArea1.resizeToCurrentText();
    textArea1.setTypedText(touchgfx::TypedText(T___SINGLEUSE_U230));
    add(textArea1);
}

It looks like a compilation optimization problem. but my compilation optimization is already set to None(-O0).

If you have any ideas about the question, please let me know, thanks.

Best regards

Rust