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#include "LayoutScrollSelect.h"
#include "MTSLog.h"
LayoutScrollSelect::LayoutScrollSelect(DOGS102* lcd, Items items, std::string info1, std::string info2)
: Layout(lcd),
_lSw1(0, 7, "Scroll"),
_lSw2(11, 7, "Select"),
_lInfo1(0, 0, info1),
_lInfo2(0, 1, info2),
_lCursor(0, 4, "=>"),
_fItem1(3, 2, 14),
_fItem2(3, 3, 14),
_fItem3(3, 4, 14),
_fItem4(3, 5, 14),
_fItem5(3, 6, 14),
_items(items)
{
_size = _items.size();
_selected = 0;
}
LayoutScrollSelect::~LayoutScrollSelect() {}
void LayoutScrollSelect::display() {
clear();
startUpdate();
writeLabel(_lSw1);
writeLabel(_lSw2);
writeLabel(_lInfo1);
writeLabel(_lInfo2);
writeLabel(_lCursor);
switch (_size) {
case 0:
// special case - no items
// (empty)
// (empty)
// => (empty)
// (empty)
// (empty)
break;
case 1:
// special case - 1 item
// (empty)
// (empty)
// => item1
// (empty)
// (empty)
writeField(_fItem3, _items[0]);
break;
case 2:
// special case - 2 items
// (empty)
// (empty)
// => item1
// item2
// (empty)
writeField(_fItem3, _items[0]);
writeField(_fItem4, _items[1]);
break;
case 3:
// special case - 3 items
// (empty)
// item3
// => item1
// item2
// (empty)
writeField(_fItem2, _items[2]);
writeField(_fItem3, _items[0]);
writeField(_fItem4, _items[1]);
break;
case 4:
// special case - 4 items
// item3
// item4
// => item1
// item2
// (empty)
writeField(_fItem1, _items[2]);
writeField(_fItem2, _items[3]);
writeField(_fItem3, _items[0]);
writeField(_fItem4, _items[1]);
break;
default:
// this is the generic case - should handle lists of 5+ items correctly
// item4 item6 item9
// item5 item7 item10
// => item1 => item1 => item1
// item2 item2 item2
// item3 item3 item3
writeField(_fItem1, _items[_size - 2]);
writeField(_fItem2, _items[_size - 1]);
writeField(_fItem3, _items[0]);
writeField(_fItem4, _items[1]);
writeField(_fItem5, _items[2]);
break;
}
endUpdate();
}
void LayoutScrollSelect::scroll() {
size_t index;
switch (_size) {
case 0:
case 1:
// nothing to scroll
break;
case 2:
// special case - 2 items
// (empty) -> (empty)
// (empty) -> (empty)
// => item1 -> => item2
// item2 -> item1
// (empty) -> (empty)
index = _selected;
// keep selected item up to date
increment(_selected);
startUpdate();
// previously selected item moves down to field4
writeField(_fItem4, _items[index]);
increment(index);
// other item moves up to field3
writeField(_fItem3, _items[index]);
endUpdate();
break;
case 3:
// special case - 3 items
// (empty) -> (empty)
// item3 -> item1
// => item1 -> => item2
// item2 -> item3
// (empty) -> (empty)
index = _selected;
// keep selected item up to date
increment(_selected);
startUpdate();
// previously selected item moves up to field2
writeField(_fItem2, _items[index]);
increment(index);
// new selected item moves up to field3
writeField(_fItem3, _items[index]);
increment(index);
// item from field2 moves down to field4
writeField(_fItem4, _items[index]);
endUpdate();
break;
case 4:
// special case - 4 items
// item3 -> item4
// item4 -> item1
// => item1 -> => item2
// item2 -> item3
// (empty) -> (empty)
index = _selected;
// keep selected item up to date
increment(_selected);
startUpdate();
// previously selected item moves up to field2
writeField(_fItem2, _items[index]);
increment(index);
// new selected item moves up to field3
writeField(_fItem3, _items[index]);
increment(index);
// item from field1 moves down to field4
writeField(_fItem4, _items[index]);
increment(index);
// item from field2 moves up to field1
writeField(_fItem1, _items[index]);
endUpdate();
break;
default:
// this is the generic case - should handle lists of 5+ items correctly
// item4 -> item5 item6 -> item7
// item5 -> item1 item7 -> item1
// => item1 -> => item2 => item1 -> => item2
// item2 -> item3 item2 -> item3
// item3 -> item4 item3 -> item4
index = _selected;
// keep selected item up to date
increment(_selected);
startUpdate();
decrement(index);
// item from field2 moves up to field1
writeField(_fItem1, _items[index]);
increment(index);
// previously selected item moves up to field2
writeField(_fItem2, _items[index]);
increment(index);
// new selected item moves up to field3
writeField(_fItem3, _items[index]);
increment(index);
// item from field5 moves up to field4
writeField(_fItem4, _items[index]);
increment(index);
// next item (from field1 or off screen) moves up to field5
writeField(_fItem5, _items[index]);
endUpdate();
break;
}
}
std::string LayoutScrollSelect::select() {
std::string selected = "";
if (_size > 0)
selected = _items[_selected];
return selected;
}
void LayoutScrollSelect::increment(size_t& index) {
if (_size > 1) {
index++;
index %= _size;
}
}
void LayoutScrollSelect::decrement(size_t& index) {
if (_size > 1) {
if (index == 0)
index = _size - 1;
else
index--;
}
}
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