touchgfx scrollWheel callback not working

[FJB2069]

 I cannot get scrollWheelUpdateItem callback to fire when the scrollWheel is moved.

 

void Button1MenuView::scrollWheelUpdateItem(MenuElement& item, int16_t itemIndex)
{
 // Override and implement this function in Button1Menu
	item.setNumber(itemIndex);
}

 

scrollWheelUpdateItem only gets called once in Button1MenuView.cpp prior to setupScreen:

 

 

void Button1MenuView::setupScreen()
{
 Button1MenuViewBase::setupScreen();

 for (int i = 0; i < scrollWheelListItems.getNumberOfDrawables(); i++)
 {
 scrollWheel.itemChanged(i);
 scrollWheelListItems[i].updateText(i);
 }

 
}

 

I assume it should get called whenever the scroll wheel is touched? Or do I

need to set up a different callback?

 

My Container for scrollWheel is MenuElement.cpp:

 

 

#include <gui/containers/MenuElement.hpp>
#include <texts/TextKeysAndLanguages.hpp>

MenuElement::MenuElement()
{

}

void MenuElement::initialize()
{
 MenuElementBase::initialize();
}

void MenuElement::updateText(int16_t value)
{
	Unicode::snprintf(textBuffer, TEXT_SIZE, "%s", touchgfx::TypedText(TEXTS(value)).getText()); //Find the correct TEXT_ID based on is position in the TEXTS enum.
	text.invalidate();
}

 

 

 MenuElement.hpp

 

#ifndef MENUELEMENT_HPP
#define MENUELEMENT_HPP

#include <gui_generated/containers/MenuElementBase.hpp>
#include <images/BitmapDatabase.hpp>

class MenuElement : public MenuElementBase
{
public:
 MenuElement();
 virtual ~MenuElement() {}
 void updateText(int16_t value);

 virtual void initialize();
 void setNumber(int no)
 {
 Unicode::itoa(no, textBuffer, TEXT_SIZE, 10);
 switch (no % 7)
 {
 case 0:
 icon.setBitmap(Bitmap(BITMAP_ICON00_ID));
 break;
 case 1:
 icon.setBitmap(Bitmap(BITMAP_ICON01_ID));
 break;
 case 2:
 icon.setBitmap(Bitmap(BITMAP_ICON02_ID));
 break;
 case 3:
 icon.setBitmap(Bitmap(BITMAP_ICON03_ID));
 break;
 case 4:
 icon.setBitmap(Bitmap(BITMAP_ICON04_ID));
 break;
 case 5:
 icon.setBitmap(Bitmap(BITMAP_ICON05_ID));
 break;
 case 6:
 icon.setBitmap(Bitmap(BITMAP_ICON06_ID));
 break;
 }
 }
protected:
};

#endif // MENUELEMENT_HPP

 

 

 

 

[FJB2069]

I figured it out.  I had a 3 item wheel and all three were being shown.  I made the scrollWheel smaller so only one item is shown, so now when I scroll the wheel to the next item it triggers.