ScrollWheel does'nt draw numbers until I move it

[Iñaki_Bidasoro]

Hi!

I'm developing an application in the simulator, I'm stuck on one bug with the scrollWheel.

I have done these two scrollWheel that i update on their respective callbacks like this:

void Display_Stages::m_scroll_pressureUpdateItem (Item_To_Select &item, int16_t itemIndex)
{
  item.Update_Text (itemIndex);
}
void Display_Stages::m_scroll_pressureUpdateCenterItem (Selected_Item &item, int16_t itemIndex)
{
  item.Update_Text (itemIndex);
}

void Display_Stages::m_scroll_timeUpdateItem (Item_To_Select &item, int16_t itemIndex)
{
  item.Update_Text (itemIndex);
}
void Display_Stages::m_scroll_timeUpdateCenterItem (Selected_Item &item, int16_t itemIndex)
{

  item.Update_Text (itemIndex);
}

The problem is that when i make the widgets visible i do scroll.animateToItem (value) so that it can go where the value we want to modify is, and this works fine, but when its a new value and the  m_scroll_pressure.animateToItem (value) value =  0, as it is the same value that the position the widget is created in the callback doesn't trigger and it doesn't print a single number until i scroll a bit.

This is how it looks when bugged:

Am I doing something wrong? 

Thanks in advance.

[GaetanGodart]

Hello @Iñaki_Bidasoro ,

My first thought is that you don't invalidate.
Try something like:

void Display_Stages::m_scroll_pressureUpdateItem (Item_To_Select &item, int16_t itemIndex)
{
  item.Update_Text (itemIndex);
  pressureWheel.invalidate();
}
void Display_Stages::m_scroll_pressureUpdateCenterItem (Selected_Item &item, int16_t itemIndex)
{
  item.Update_Text (itemIndex);
  pressureWheel.invalidate();
}

void Display_Stages::m_scroll_timeUpdateItem (Item_To_Select &item, int16_t itemIndex)
{
  item.Update_Text (itemIndex);
  timeWheel.invalidate();
}
void Display_Stages::m_scroll_timeUpdateCenterItem (Selected_Item &item, int16_t itemIndex)
{

  item.Update_Text (itemIndex);
  timeWheel.invalidate();
}

(replace "pressureWheel" and "timeWheel" by the name of your scrollWheels).

If this comment solves your issue, I invite you to select it as "best answer".

If this doesn't solve your problem, I invite you to share your project in a 7z zipped file so I can try it myself.

Regards,

[GaetanGodart]

Hello @Iñaki_Bidasoro ,

Have you been able to solve your problem?
If so, I invite you to select the most helpful comment as "best answer".

Regards,

[Dadigno]

Hello,

I'm stuck with the same problem. @Iñaki_Bidasoro, did you manage to solve it?

@GaetanGodart, your solution doesn't work for me. The ScrollWheel doesn't update unless I call animateToItem from a hardware button callback. Both scrollWheelMenuUpdateCenterItem and scrollWheelMenuUpdateItem are called, but they have no effect on the framebuffer.

It actually works in the simulator, so I suspect there might be a bug in the widget.

Regards,

Davide

[GaetanGodart]

Hello @Dadigno ,

The project you share have no ioc file so I cannot run it on a board.
If I create a new project with a board and import your GUI, I get errors.

Can you please share the full project with with the ioc file (so not just the TouchGFX folder but the "root" folder).

Regards,

[Dadigno]

The board is custom, so I don't think you can test it directly.

However, you can test this behavior in your own context with a simple scrollwheel. Take a look at my MenuView.cpp class.

[GaetanGodart]

Hello @Dadigno ,

It seems like I have to look at more than just the MenuView.cpp file to reproduce what you have.

It seems like you first do :

void MenuView::setupScreen()
{
    MenuViewBase::setupScreen();
    scrollWheelMenu.setNumberOfItems(presenter->getMenuNumberOfEntry()+1);
}

What happens if you invalidate the scrollWheel after that?
What happens if you call childgeometrychanged on your scrollWheel and then invalidate?

Regards,