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First commit of AIS data scroller.

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It's weird and buggy right now, but I think I can make it work sensibly.
This commit is contained in:
Jared Boone 2015-12-08 14:16:36 -08:00
parent 90a7327cd5
commit 280acfd227
1 changed files with 27 additions and 15 deletions
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36
firmware/application/app_ais.cpp
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@ -432,24 +432,36 @@ void AISView::paint(Painter& painter) {
const auto& s = style(); const auto& s = style();
Rect target_rect { r.pos, { r.width(), s.font.line_height() }}; Rect target_rect { r.pos, { r.width(), s.font.line_height() }};
bool found_selected_item = false; const size_t visible_item_count = r.height() / s.font.line_height();
for(const auto entry : recent) {
const auto next_y = target_rect.pos.y + target_rect.height();
const auto last_visible_entry = (next_y >= r.bottom());
auto selected = selected_entry();
if( selected == std::end(recent) ) {
selected = std::begin(recent);
}
RecentEntries::iterator start = selected;
RecentEntries::iterator end = selected;
size_t i = 0;
// Move start iterator toward first entry.
while( (start != std::begin(recent)) && (i < visible_item_count / 2) ) {
std::advance(start, -1);
i++;
}
// Move end iterator toward last entry.
while( (end != std::end(recent)) && (i < visible_item_count) ) {
std::advance(end, 1);
i++;
}
for(auto p = start; p != end; p++) {
const auto& entry = *p;
const auto is_selected_key = (selected_key == entry.mmsi); const auto is_selected_key = (selected_key == entry.mmsi);
found_selected_item |= is_selected_key;
if( !last_visible_entry || (last_visible_entry && found_selected_item) ) {
const auto& draw_style = (has_focus && is_selected_key) ? s.invert() : s; const auto& draw_style = (has_focus && is_selected_key) ? s.invert() : s;
draw_entry(entry, target_rect, painter, draw_style); draw_entry(entry, target_rect, painter, draw_style);
target_rect.pos.y += target_rect.height(); target_rect.pos.y += target_rect.height();
} }
if( last_visible_entry && found_selected_item ) {
break;
}
}
} }
AISView::RecentEntries::iterator AISView::selected_entry() { AISView::RecentEntries::iterator AISView::selected_entry() {