portapack-mayhem/firmware/application/ui_menu.cpp
2016-11-28 11:25:27 -08:00

174 lines
3.8 KiB
C++

/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "ui_menu.hpp"
namespace ui {
/* MenuViewItem **********************************************************/
void MenuItemView::select() {
if( item.on_select ) {
item.on_select();
}
}
void MenuItemView::highlight() {
set_highlighted(true);
set_dirty();
}
void MenuItemView::unhighlight() {
set_highlighted(false);
set_dirty();
}
void MenuItemView::paint(Painter& painter) {
const auto r = screen_rect();
const auto paint_style = (highlighted() && parent()->has_focus()) ? style().invert() : style();
const auto font_height = paint_style.font.line_height();
painter.fill_rectangle(
r,
paint_style.background
);
painter.draw_string(
{ r.left() + 8, r.top() + (r.height() - font_height) / 2 },
paint_style,
item.text
);
}
/* MenuView **************************************************************/
MenuView::~MenuView() {
/* TODO: Double-check this */
for(auto child : children_) {
delete child;
}
}
void MenuView::add_item(MenuItem item) {
add_child(new MenuItemView { item });
}
void MenuView::add_items(std::initializer_list<MenuItem> items) {
for(auto item : items) {
add_item(item);
}
}
void MenuView::set_parent_rect(const Rect new_parent_rect) {
View::set_parent_rect(new_parent_rect);
constexpr size_t item_height = 24;
size_t i = 0;
for(auto child : children_) {
child->set_parent_rect({
{ 0, static_cast<ui::Coord>(i * item_height) },
{ size().width(), item_height }
});
i++;
}
}
MenuItemView* MenuView::item_view(size_t index) const {
/* TODO: Terrible cast! Take it as a sign I must be doing something
* shamefully wrong here, right?
*/
return static_cast<MenuItemView*>(children_[index]);
}
size_t MenuView::highlighted() const {
return highlighted_;
}
bool MenuView::set_highlighted(const size_t new_value) {
if( new_value >= children_.size() ) {
return false;
}
item_view(highlighted())->unhighlight();
highlighted_ = new_value;
item_view(highlighted())->highlight();
return true;
}
void MenuView::on_focus() {
item_view(highlighted())->highlight();
}
void MenuView::on_blur() {
item_view(highlighted())->unhighlight();
}
bool MenuView::on_key(const KeyEvent key) {
switch(key) {
case KeyEvent::Up:
return set_highlighted(highlighted() - 1);
case KeyEvent::Down:
return set_highlighted(highlighted() + 1);
case KeyEvent::Select:
case KeyEvent::Right:
item_view(highlighted())->select();
return true;
case KeyEvent::Left:
if( on_left ) {
on_left();
}
return true;
default:
return false;
}
}
bool MenuView::on_encoder(const EncoderEvent event) {
set_highlighted(highlighted() + event);
return true;
}
/* TODO: This could be handled by default behavior, if the UI stack were to
* transmit consumable events from the top of the hit-stack down, and each
* MenuItem could respond to a touch and update its parent MenuView.
*/
/*
bool MenuView::on_touch(const TouchEvent event) {
size_t i = 0;
for(const auto child : children_) {
if( child->screen_rect().contains(event.point) ) {
return set_highlighted(i);
}
i++;
}
return false;
}
*/
} /* namespace ui */