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

[Anders Nedergaard PETERSEN]

Hi @DMane​,

Please see this forum post on how to interface between hardware and the UI (TouchGFX)

https://community.st.com/s/question/0D50X0000AU4zodSQB/interfacing-with-hardware-in-touchgfx-applications

With the Designer you can add an interaction to a button which will then do a screen transition. Have a look at the code in the generated folder:

In generated/gui_generated/include/gui_generated/common/FrontEndHeapBase.hpp you will now see that a slidetransition has been added to the list of "GeneatedTransitionTypes".

 /**
 * A list of all transition types. Must end with meta::Nil.
 * @note All transition types used in the application MUST be added to this list!
 */
 typedef meta::TypeList< NoTransition,
 meta::TypeList< SlideTransition<EAST>,
 meta::Nil >
 > GeneratedTransitionTypes;

Now lets have a look at the FrontendApplicationBase.hpp (generated/gui_generated/include/gui_generated/common/FrontendApplicationBase.hpp)

here we see that function prototypes to to the transition have been added, the "void gotoScreen2ScreenSlideTransitionEast();" and "void gotoScreen2ScreenSlideTransitionEastImpl();"

The implementation of these are found in generated/gui_generated/src/common/FrontendApplicationBase.cpp

void FrontendApplicationBase::gotoScreen2ScreenSlideTransitionEast()
{
 transitionCallback = touchgfx::Callback<FrontendApplicationBase>(this, &FrontendApplication::gotoScreen2ScreenSlideTransitionEastImpl);
 pendingScreenTransitionCallback = &transitionCallback;
}
 
void FrontendApplicationBase::gotoScreen2ScreenSlideTransitionEastImpl()
{
 makeTransition<Screen2View, Screen2Presenter, touchgfx::SlideTransition<EAST>, Model >(&currentScreen, &currentPresenter, frontendHeap, &currentTransition, &model);
}

Please take a look at the attached files, here the transition is done by adding the same scheme to the FrontendHeap.cpp and FrontendApplication.cpp placed in the gui folder.

I hope this helps

/Anders