mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
297 lines
7.0 KiB
C++
297 lines
7.0 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __RECENT_ENTRIES_H__
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#define __RECENT_ENTRIES_H__
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#include "ui_widget.hpp"
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#include "ui_font_fixed_8x16.hpp"
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#include <cstddef>
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#include <cstdint>
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#include <list>
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#include <utility>
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#include <functional>
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#include <iterator>
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#include <algorithm>
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template<class Entry>
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using RecentEntries = std::list<Entry>;
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template<typename ContainerType, typename Key>
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typename ContainerType::const_iterator find(const ContainerType& entries, const Key key) {
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return std::find_if(
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std::begin(entries), std::end(entries),
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[key](typename ContainerType::const_reference e) { return e.key() == key; }
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);
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}
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template<typename ContainerType>
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static void truncate_entries(ContainerType& entries, const size_t entries_max = 64) {
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while(entries.size() > entries_max) {
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entries.pop_back();
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}
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}
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template<typename ContainerType, typename Key>
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typename ContainerType::reference on_packet(ContainerType& entries, const Key key) {
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auto matching_recent = find(entries, key);
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if( matching_recent != std::end(entries) ) {
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// Found within. Move to front of list, increment counter.
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entries.push_front(*matching_recent);
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entries.erase(matching_recent);
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} else {
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entries.emplace_front(key);
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truncate_entries(entries);
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}
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return entries.front();
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}
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template<typename ContainerType>
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static std::pair<typename ContainerType::const_iterator, typename ContainerType::const_iterator> range_around(
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const ContainerType& entries,
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typename ContainerType::const_iterator item,
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const size_t count
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) {
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auto start = item;
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auto end = item;
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size_t i = 0;
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// Move start iterator toward first entry.
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while( (start != std::begin(entries)) && (i < count / 2) ) {
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std::advance(start, -1);
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i++;
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}
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// Move end iterator toward last entry.
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while( (end != std::end(entries)) && (i < count) ) {
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std::advance(end, 1);
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i++;
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}
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return { start, end };
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}
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namespace ui {
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using RecentEntriesColumn = std::pair<std::string, size_t>;
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class RecentEntriesColumns {
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public:
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using ContainerType = std::vector<RecentEntriesColumn>;
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RecentEntriesColumns(
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const std::initializer_list<RecentEntriesColumn> columns
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);
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ContainerType::const_iterator begin() const { return std::begin(_columns); }
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ContainerType::const_iterator end() const { return std::end(_columns); }
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private:
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const ContainerType _columns;
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};
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class RecentEntriesHeader : public Widget {
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public:
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RecentEntriesHeader(
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const RecentEntriesColumns& columns
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);
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void paint(Painter& painter) override;
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private:
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const RecentEntriesColumns& _columns;
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};
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template<class Entries>
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class RecentEntriesTable : public Widget {
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public:
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using Entry = typename Entries::value_type;
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std::function<void(const Entry& entry)> on_select { };
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RecentEntriesTable(
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Entries& recent
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) : recent { recent }
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{
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set_focusable(true);
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}
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void paint(Painter& painter) override {
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const auto r = screen_rect();
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const auto& s = style();
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Rect target_rect { r.location(), { r.width(), s.font.line_height() }};
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const size_t visible_item_count = r.height() / s.font.line_height();
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auto selected = find(recent, selected_key);
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if( selected == std::end(recent) ) {
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selected = std::begin(recent);
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}
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auto range = range_around(recent, selected, visible_item_count);
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for(auto p = range.first; p != range.second; p++) {
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const auto& entry = *p;
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const auto is_selected_key = (selected_key == entry.key());
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const auto item_style = (has_focus() && is_selected_key) ? s.invert() : s;
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draw(entry, target_rect, painter, item_style);
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target_rect += { 0, target_rect.height() };
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}
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painter.fill_rectangle(
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{ target_rect.left(), target_rect.top(), target_rect.width(), r.bottom() - target_rect.top() },
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style().background
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);
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}
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bool on_encoder(const EncoderEvent event) override {
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advance(event);
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return true;
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}
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bool on_key(const ui::KeyEvent event) override {
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if( event == ui::KeyEvent::Select ) {
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if( on_select ) {
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const auto selected = find(recent, selected_key);
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if( selected != std::end(recent) ) {
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on_select(*selected);
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return true;
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}
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}
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}
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else if( event == ui::KeyEvent::Up ) {
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if(selected_key == recent.front().key()){
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return false;
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}
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else {
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advance(-1);
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return true;
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}
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}
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else if( event == ui::KeyEvent::Down ) {
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if( selected_key == recent.back().key()) {
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return false;
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}
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else {
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advance(1);
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return true;
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}
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}
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return false;
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}
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void on_focus() override {
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advance(0);
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}
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private:
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Entries& recent;
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using EntryKey = typename Entry::Key;
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EntryKey selected_key = Entry::invalid_key;
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void advance(const int32_t amount) {
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auto selected = find(recent, selected_key);
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if( selected == std::end(recent) ) {
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if( recent.empty() ) {
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selected_key = Entry::invalid_key;
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} else {
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selected_key = recent.front().key();
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}
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} else {
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if( amount < 0 ) {
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if( selected != std::begin(recent) ) {
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std::advance(selected, -1);
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}
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}
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if( amount > 0 ) {
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std::advance(selected, 1);
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if( selected == std::end(recent) ) {
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return;
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}
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}
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selected_key = selected->key();
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}
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set_dirty();
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}
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void draw(
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const Entry& entry,
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const Rect& target_rect,
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Painter& painter,
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const Style& style
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);
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};
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template<class Entries>
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class RecentEntriesView : public View {
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public:
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using Entry = typename Entries::value_type;
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std::function<void(const Entry& entry)> on_select { };
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RecentEntriesView(
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const RecentEntriesColumns& columns,
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Entries& recent
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) : _header { columns },
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_table { recent }
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{
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add_children({
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&_header,
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&_table,
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});
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_table.on_select = [this](const Entry& entry) { if( this->on_select ) { this->on_select(entry); } };
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}
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void set_parent_rect(const Rect new_parent_rect) override {
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constexpr Dim scale_height = 16;
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View::set_parent_rect(new_parent_rect);
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_header.set_parent_rect({ 0, 0, new_parent_rect.width(), scale_height });
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_table.set_parent_rect({
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0, scale_height,
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new_parent_rect.width(),
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new_parent_rect.height() - scale_height
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});
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}
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void paint(Painter&) override {
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// Children completely cover this View, do not paint.
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// TODO: What happens here shouldn't matter if I do proper damage detection!
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}
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void focus() override {
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_table.focus();
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}
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private:
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RecentEntriesHeader _header;
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RecentEntriesTable<Entries> _table;
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};
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} /* namespace ui */
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#endif/*__RECENT_ENTRIES_H__*/
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