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navigation.c
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navigation.c
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#include "navigation.h"
bool navigation_keystroke_handler(navigation_t* navigation, uint32_t key)
{
uint8_t previously_selected = navigation->selected;
switch (key)
{
case 's':
case '2':
case KEY_TAB:
case KEY_DOWN:
navigation->selected = (navigation->selected + 1) % navigation->selectables_count;
break;
case 'w':
case '8':
case KEY_SHIFT_TAB:
case KEY_UP:
navigation->selected = (navigation->selected + navigation->selectables_count - 1) % navigation->selectables_count;
break;
default:
// key unhandled
return false;
}
// leave previously selected element
switch (navigation->selectables[previously_selected].type)
{
case TYPE_CHECKBOX:
checkbox_deselect( (checkbox_t*) navigation->selectables[previously_selected].element );
break;
case TYPE_SLIDER:
slider_deselect( (slider_t*) navigation->selectables[previously_selected].element );
break;
case TYPE_BUTTON:
button_deselect( (button_t*) navigation->selectables[previously_selected].element );
break;
default:
break;
}
// highlight now selected element
switch (navigation->selectables[navigation->selected].type)
{
case TYPE_CHECKBOX:
checkbox_select( (checkbox_t*) navigation->selectables[navigation->selected].element );
break;
case TYPE_SLIDER:
slider_select( (slider_t*) navigation->selectables[navigation->selected].element );
break;
case TYPE_BUTTON:
button_select( (button_t*) navigation->selectables[navigation->selected].element );
break;
default:
break;
}
// key was handled
return true;
}