StartScreen.hpp

#pragma once
#include <score/model/Skin.hpp>
#include <score/tools/ThreadPool.hpp>
#include <score/widgets/Pixmap.hpp>
 
#include <core/view/QRecentFilesMenu.h>
 
#include <QApplication>
#include <QDesktopServices>
#include <QKeyEvent>
#include <QLabel>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QPainter>
#include <QPixmap>
#include <QPointer>
#include <QSettings>
#include <QTextLayout>
#include <QThread>
 
#include <score_git_info.hpp>
 
#include <optional>
#include <verdigris>
 
namespace score
{
namespace
{
template <typename OnSuccess, typename OnError>
class HTTPGet final : public QNetworkAccessManager
{
public:
  explicit HTTPGet(QUrl url, OnSuccess on_success, OnError on_error) noexcept
      : m_callback{std::move(on_success)}
      , m_error{std::move(on_error)}
  {
    connect(this, &QNetworkAccessManager::finished, this, [this](QNetworkReply* reply) {
      if(reply->error())
      {
        qDebug() << reply->errorString();
        m_error();
      }
      else
      {
        m_callback(reply->readAll());
      }
 
      reply->deleteLater();
      this->deleteLater();
    });
 
    QNetworkRequest req{std::move(url)};
    req.setRawHeader("User-Agent", "curl/7.35.0");
    req.setAttribute(QNetworkRequest::HttpPipeliningAllowedAttribute, true);
    req.setAttribute(
        QNetworkRequest::RedirectPolicyAttribute,
        QNetworkRequest::UserVerifiedRedirectPolicy);
    req.setAttribute(QNetworkRequest::Http2AllowedAttribute, true);
 
    auto reply = get(req);
    connect(reply, &QNetworkReply::redirected, reply, &QNetworkReply::redirectAllowed);
  }
 
private:
  OnSuccess m_callback;
  OnError m_error;
};
 
}
class InteractiveLabel : public QWidget
{
  W_OBJECT(InteractiveLabel)
 
public:
  InteractiveLabel(
      const QFont& font, const QString& text, const QString url, QWidget* parent = 0);
 
  void setOpenExternalLink(bool val) { m_openExternalLink = val; }
  void setPixmaps(const QPixmap& pixmap, const QPixmap& pixmapOn);
 
  void disableInteractivity();
  void setActiveColor(const QColor& c);
  void setInactiveColor(const QColor& c);
  void setTextOption(QTextOption opt) { m_textOption = opt; }
 
  void labelPressed(const QString& file) W_SIGNAL(labelPressed, file)
 
  QRectF textBoundingBox(double width) const noexcept;
 
protected:
  void paintEvent(QPaintEvent* event) override;
  void enterEvent(QEnterEvent* event) override;
  void leaveEvent(QEvent* event) override;
  void mousePressEvent(QMouseEvent* event) override;
 
private:
  QFont m_font;
  QString m_title;
 
  QString m_url;
  bool m_openExternalLink{};
 
  bool m_drawPixmap{};
  QPixmap m_currentPixmap;
  QPixmap m_pixmap;
  QPixmap m_pixmapOn;
 
  bool m_interactive{};
  QColor m_currentColor;
  QColor m_activeColor;
  QColor m_inactiveColor;
 
  QTextOption m_textOption;
};
 
InteractiveLabel::InteractiveLabel(
    const QFont& font, const QString& title, const QString url, QWidget* parent)
    : QWidget{parent}
    , m_font(font)
    , m_title(title)
    , m_url(url)
    , m_openExternalLink(false)
    , m_drawPixmap(false)
    , m_interactive(true)
{
  auto& skin = score::Skin::instance();
  m_inactiveColor = QColor{"#d3d3d3"}; //"#f0f0f0"};
  m_activeColor = QColor{"#03C3DD"};
  m_currentColor = m_inactiveColor;
  setCursor(skin.CursorPointingHand);
  setFixedSize(200, 34);
}
 
void InteractiveLabel::setPixmaps(const QPixmap& pixmap, const QPixmap& pixmapOn)
{
  m_drawPixmap = true;
  m_pixmap = pixmap;
  m_pixmapOn = pixmapOn;
  m_currentPixmap = m_pixmap;
}
 
void InteractiveLabel::disableInteractivity()
{
  m_interactive = false;
  setCursor(Qt::ArrowCursor);
}
 
void InteractiveLabel::setActiveColor(const QColor& c)
{
  m_activeColor = c;
}
 
void InteractiveLabel::setInactiveColor(const QColor& c)
{
  m_inactiveColor = c;
  m_currentColor = m_inactiveColor;
}
 
QRectF InteractiveLabel::textBoundingBox(double width) const noexcept
{
  int leading = QFontMetrics{m_font}.leading();
  QTextLayout lay;
  lay.setText(m_title);
  lay.setFont(m_font);
  lay.setTextOption(m_textOption);
  lay.beginLayout();
  double height{};
  while(true)
  {
    QTextLine line = lay.createLine();
    if(!line.isValid())
      break;
 
    line.setLineWidth(width);
    height += leading;
    line.setPosition(QPointF(0, height));
    height += line.height();
  }
  lay.endLayout();
  return lay.boundingRect();
}
 
void InteractiveLabel::paintEvent(QPaintEvent* event)
{
  QPainter painter(this);
 
  painter.setRenderHint(QPainter::Antialiasing, true);
  painter.setRenderHint(QPainter::TextAntialiasing, true);
  painter.setRenderHint(QPainter::RenderHint::SmoothPixmapTransform);
  painter.setPen(QPen{m_currentColor});
 
  painter.save();
  QRectF textRect = rect();
  if(m_drawPixmap)
  {
    int size = m_currentPixmap.width() / m_currentPixmap.devicePixelRatio();
    int pixmapX = 0;
 
    if(m_textOption.alignment() == Qt::AlignRight)
    {
      QTextLayout lay;
      lay.setText(m_title);
      lay.setFont(m_font);
      lay.setTextOption(m_textOption);
      lay.beginLayout();
      lay.createLine();
      lay.endLayout();
      pixmapX = lay.boundingRect().width();
    }
    painter.drawPixmap(
        width() - pixmapX - size - 6, (textRect.height() - size - 10) / 2,
        m_currentPixmap);
    textRect.setX(textRect.x() + size + 6);
  }
  painter.setFont(m_font);
  painter.drawText(textRect, m_title, m_textOption);
  painter.restore();
}
 
void InteractiveLabel::enterEvent(QEnterEvent* event)
{
  if(!m_interactive)
    return;
 
  m_currentColor = m_activeColor;
  m_font.setUnderline(true);
  m_currentPixmap = m_pixmapOn;
 
  repaint();
}
 
void InteractiveLabel::leaveEvent(QEvent* event)
{
  if(!m_interactive)
    return;
 
  m_currentColor = m_inactiveColor;
  m_font.setUnderline(false);
  m_currentPixmap = m_pixmap;
 
  repaint();
}
 
void InteractiveLabel::mousePressEvent(QMouseEvent* event)
{
  if(m_openExternalLink)
  {
    QDesktopServices::openUrl(QUrl(m_url));
  }
  else
  {
    labelPressed(m_url);
  }
}
class StartScreen : public QWidget
{
  W_OBJECT(StartScreen)
public:
  StartScreen(const QPointer<QRecentFilesMenu>& recentFiles, QWidget* parent = 0);
 
  void openNewDocument() W_SIGNAL(openNewDocument)
  void openFile(const QString& file) W_SIGNAL(openFile, file)
  void openFileDialog() W_SIGNAL(openFileDialog)
  void loadCrashedSession() W_SIGNAL(loadCrashedSession)
  void exitApp() W_SIGNAL(exitApp)
 
  void addLoadCrashedSession();
 
protected:
  void paintEvent(QPaintEvent* event) override;
  void keyPressEvent(QKeyEvent* event) override;
 
private:
  QPixmap m_background;
  InteractiveLabel* m_crashLabel{};
};
struct StartScreenLink
{
  QString name;
  QString url;
  QString pixmap;
  QString pixmapOn;
  StartScreenLink(
      const QString& n, const QString& u, const QString& p, const QString& pOn)
      : name(n)
      , url(u)
      , pixmap(p)
      , pixmapOn(pOn)
  {
  }
};
 
StartScreen::StartScreen(const QPointer<QRecentFilesMenu>& recentFiles, QWidget* parent)
    : QWidget(parent)
{
  auto& skin = score::Skin::instance();
  setCursor(skin.CursorPointer);
// Workaround until https://bugreports.qt.io/browse/QTBUG-103225 is fixed
#if defined(__APPLE__)
  static constexpr double font_factor = 96. / 72.;
#else
  static constexpr double font_factor = 1.;
#endif
  QFont f("Ubuntu", 14  * font_factor, QFont::Light);
  f.setHintingPreference(QFont::HintingPreference::PreferFullHinting);
  f.setStyleStrategy(QFont::PreferAntialias);
 
  QFont titleFont("Montserrat", 14  * font_factor, QFont::DemiBold);
  titleFont.setHintingPreference(QFont::HintingPreference::PreferFullHinting);
  titleFont.setStyleStrategy(QFont::PreferAntialias);
 
  this->setEnabled(true);
  setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint); //| Qt::WindowStaysOnTopHint);
  setWindowModality(Qt::ApplicationModal);
 
  m_background = score::get_pixmap(":/startscreen/startscreensplash.png");
 
  if(QPainter painter; painter.begin(&m_background))
  {
    painter.setRenderHint(QPainter::Antialiasing, true);
    painter.setRenderHint(QPainter::TextAntialiasing, true);
    painter.setPen(QPen(QColor("#0092CF")));
 
    painter.setFont(f);
    //painter.drawText(QPointF(250, 170), QCoreApplication::applicationVersion());
    painter.drawText(QPointF(217, 188), QCoreApplication::applicationVersion());
    painter.end();
  }
 
  // Weird code here is because the window size seems to scale only to integer ratios.
  setFixedSize(m_background.size() / m_background.devicePixelRatioF());
 
  {
    // new version
    auto& tp = score::ThreadPool::instance();
    auto t = tp.acquireThread();
    QMetaObject::invokeMethod(t, [t, self = QPointer{this}, titleFont] {
      auto m_getLastVersion = new HTTPGet{
          QUrl("https://ossia.io/score-last-version.txt"),
          [self, titleFont](const QByteArray& data) {
        auto version = QString::fromUtf8(data.simplified());
        if(SCORE_TAG_NO_V < version)
        {
          QString text
              = qApp->tr("New version %1 is available, click to update !").arg(version);
          QString url = "https://github.com/ossia/score/releases/latest/";
          QMetaObject::invokeMethod(
              QCoreApplication::instance(), [self, titleFont, text, url] {
            if(!self)
              return;
            InteractiveLabel* label = new InteractiveLabel{titleFont, text, url, self};
            label->setPixmaps(
                score::get_pixmap(":/icons/version_on.png"),
                score::get_pixmap(":/icons/version_off.png"));
            label->setOpenExternalLink(true);
            label->setInactiveColor(QColor{"#f6a019"});
            label->setActiveColor(QColor{"#f0f0f0"});
            label->setFixedWidth(600);
            label->move(280, 170);
            label->show();
          });
        }
      }, [] { }};
      connect(m_getLastVersion, &QObject::destroyed, t, [] {
        QMetaObject::invokeMethod(QCoreApplication::instance(), [] {
          auto& tp = score::ThreadPool::instance();
          tp.releaseThread();
        });
      });
    });
  }
 
  float label_x = 300;
  float label_y = 215;
 
  { // recent files
    auto label = new InteractiveLabel{titleFont, qApp->tr("Recent files"), "", this};
    label->setTextOption(QTextOption(Qt::AlignRight));
    label->setPixmaps(
        score::get_pixmap(":/icons/recent_files.png"),
        score::get_pixmap(":/icons/recent_files.png"));
    label->setInactiveColor(QColor{"#f0f0f0"});
    label->setActiveColor(QColor{"#03C3DD"});
    label->disableInteractivity();
    label->move(label_x, label_y);
    label_y += 35;
  }
  f.setPointSize(12);
 
  // label_x += 40;
  for(const auto& action : recentFiles->actions())
  {
    auto fileLabel
        = new InteractiveLabel{f, action->text(), action->data().toString(), this};
    fileLabel->setTextOption(QTextOption(Qt::AlignRight));
    connect(
        fileLabel, &score::InteractiveLabel::labelPressed, this,
        &score::StartScreen::openFile);
 
    auto textHeight = std::max(25, (int)fileLabel->textBoundingBox(200).height() + 7);
    fileLabel->setFixedSize(200, textHeight);
    fileLabel->move(label_x, label_y);
    label_y += textHeight + 1;
  }
  // label_x = 160;
  label_y += 10;
 
  m_crashLabel
      = new InteractiveLabel{titleFont, qApp->tr("Restore last session"), "", this};
  m_crashLabel->setTextOption(QTextOption(Qt::AlignRight));
  m_crashLabel->setPixmaps(
      score::get_pixmap(":/icons/reload_crash_off.png"),
      score::get_pixmap(":/icons/reload_crash_on.png"));
  m_crashLabel->move(label_x - 100, label_y);
  m_crashLabel->setFixedWidth(300);
  m_crashLabel->setInactiveColor(QColor{"#f0f0f0"});
  m_crashLabel->setActiveColor(QColor{"#f6a019"});
  m_crashLabel->setDisabled(true);
  m_crashLabel->hide();
  connect(
      m_crashLabel, &score::InteractiveLabel::labelPressed, this,
      &score::StartScreen::loadCrashedSession);
 
  label_x = 510;
  label_y = 215;
  { // Create new
    InteractiveLabel* label = new InteractiveLabel{titleFont, qApp->tr("New"), "", this};
    label->setPixmaps(
        score::get_pixmap(":/icons/new_file_off.png"),
        score::get_pixmap(":/icons/new_file_on.png"));
    connect(
        label, &score::InteractiveLabel::labelPressed, this,
        &score::StartScreen::openNewDocument);
    label->move(label_x, label_y);
    label_y += 35;
  }
  { // Load file
    InteractiveLabel* label
        = new InteractiveLabel{titleFont, qApp->tr("Load"), "", this};
    label->setPixmaps(
        score::get_pixmap(":/icons/load_off.png"),
        score::get_pixmap(":/icons/load_on.png"));
    connect(
        label, &score::InteractiveLabel::labelPressed, this,
        &score::StartScreen::openFileDialog);
    label->move(label_x, label_y);
    label_y += 35;
  }
  { // Load Examples
    QSettings settings;
    auto library_path = settings.value("Library/RootPath").toString();
    InteractiveLabel* label = new InteractiveLabel{
        titleFont, qApp->tr("Examples"), "https://ossia.io/score-docs/examples", this};
    label->setPixmaps(
        score::get_pixmap(":/icons/load_examples_off.png"),
        score::get_pixmap(":/icons/load_examples_on.png"));
    label->setOpenExternalLink(true);
    label->move(label_x, label_y);
    label_y += 35;
  }
 
  label_y += 20;
 
  std::array<score::StartScreenLink, 4> menus
      = {{{qApp->tr("Tutorials"),
           "https://www.youtube.com/"
           "watch?v=R-3d8K6gQkw&list=PLIHLSiZpIa6YoY1_aW1yetDgZ7tZcxfEC&index=1",
           ":/icons/tutorials_off.png", ":/icons/tutorials_on.png"},
          {qApp->tr("Contribute"), "https://opencollective.com/ossia/contribute",
           ":/icons/contribute_off.png", ":/icons/contribute_on.png"},
          {qApp->tr("Forum"), "http://forum.ossia.io/", ":/icons/forum_off.png",
           ":/icons/forum_on.png"},
          {qApp->tr("Chat"), "https://gitter.im/ossia/score", ":/icons/chat_off.png",
           ":/icons/chat_on.png"}}};
  for(const auto& m : menus)
  {
    InteractiveLabel* menu_url = new InteractiveLabel{titleFont, m.name, m.url, this};
    menu_url->setOpenExternalLink(true);
    menu_url->setPixmaps(score::get_pixmap(m.pixmap), score::get_pixmap(m.pixmapOn));
    menu_url->move(label_x, label_y);
    label_y += 35;
  }
 
  label_y += 10;
 
  { // Exit App
    InteractiveLabel* label
        = new InteractiveLabel{titleFont, qApp->tr("Exit"), "", this};
    label->setPixmaps(
        score::get_pixmap(":/icons/exit_off.png"),
        score::get_pixmap(":/icons/exit_on.png"));
    connect(
        label, &score::InteractiveLabel::labelPressed, this,
        &score::StartScreen::exitApp);
    label->move(label_x, label_y);
  }
}
 
void StartScreen::addLoadCrashedSession()
{
  m_crashLabel->show();
  m_crashLabel->setEnabled(true);
  update();
}
 
void StartScreen::paintEvent(QPaintEvent* event)
{
  QPainter painter(this);
  painter.setRenderHint(QPainter::RenderHint::SmoothPixmapTransform);
  painter.drawPixmap(0, 0, m_background);
}
 
void StartScreen::keyPressEvent(QKeyEvent* event)
{
  if(event->key() == Qt::Key_Escape)
  {
    this->openNewDocument();
    this->close();
    return QWidget::keyPressEvent(event);
  }
}
}