flameshot/src/widgets/infowindow.cpp

// Copyright(c) 2017-2019 Alejandro Sirgo Rica & Contributors
//
// This file is part of Flameshot.
//
//     Flameshot 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 3 of the License, or
//     (at your option) any later version.
//
//     Flameshot 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 Flameshot.  If not, see <http://www.gnu.org/licenses/>.

#include "infowindow.h"
#include <QHeaderView>
#include <QIcon>
#include <QKeyEvent>
#include <QLabel>
#include <QTableWidget>
#include <QVBoxLayout>

#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
#include <QCursor>
#include <QGuiApplication>
#include <QRect>
#include <QScreen>
#endif

// InfoWindow show basic information about the usage of Flameshot

InfoWindow::InfoWindow(QWidget* parent)
  : QWidget(parent)
{
  setAttribute(Qt::WA_DeleteOnClose);
  setWindowIcon(QIcon(":img/app/flameshot.svg"));
  setWindowTitle(tr("About"));

#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
  QRect position = frameGeometry();
  QScreen* screen = QGuiApplication::screenAt(QCursor::pos());
  position.moveCenter(screen->availableGeometry().center());
  move(position.topLeft());
#endif

  m_layout = new QVBoxLayout(this);
  m_layout->setAlignment(Qt::AlignHCenter);
  initLabels();
  initInfoTable();
  show();
}

QVector<const char*> InfoWindow::m_keys = { "←↓↑→",
                                            "SHIFT + ←↓↑→",
                                            "ESC",
                                            "CTRL + C",
                                            "CTRL + S",
                                            "CTRL + Z",
                                            QT_TR_NOOP("SPACEBAR"),
                                            QT_TR_NOOP("Right Click"),
                                            QT_TR_NOOP("Mouse Wheel") };

QVector<const char*> InfoWindow::m_description = {
  QT_TR_NOOP("Move selection 1px"),
  QT_TR_NOOP("Resize selection 1px"),
  QT_TR_NOOP("Quit capture"),
  QT_TR_NOOP("Copy to clipboard"),
  QT_TR_NOOP("Save selection as a file"),
  QT_TR_NOOP("Undo the last modification"),
  QT_TR_NOOP("Toggle visibility of sidebar with options of the selected tool"),
  QT_TR_NOOP("Show color picker"),
  QT_TR_NOOP("Change the tool's thickness")
};

void
InfoWindow::initInfoTable()
{
  QTableWidget* table = new QTableWidget(this);
  table->setToolTip(tr("Available shortcuts in the screen capture mode."));

  m_layout->addWidget(table);

  table->setColumnCount(2);
  table->setRowCount(m_keys.size());
  table->setSelectionMode(QAbstractItemView::NoSelection);
  table->setFocusPolicy(Qt::NoFocus);
  table->verticalHeader()->hide();
  // header creation
  QStringList names;
  names << tr("Key") << tr("Description");
  table->setHorizontalHeaderLabels(names);

  // add content
  for (int i = 0; i < m_keys.size(); ++i) {
    table->setItem(i, 0, new QTableWidgetItem(tr(m_keys.at(i))));
    table->setItem(i, 1, new QTableWidgetItem(tr(m_description.at(i))));
  }

  // Read-only table items
  for (int x = 0; x < table->rowCount(); ++x) {
    for (int y = 0; y < table->columnCount(); ++y) {
      QTableWidgetItem* item = table->item(x, y);
      item->setFlags(item->flags() ^ Qt::ItemIsEditable);
    }
  }

  // adjust size
  table->resizeColumnsToContents();
  table->resizeRowsToContents();
  table->setMinimumWidth(400);
  table->setMaximumWidth(600);

  table->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Stretch);
  table->horizontalHeader()->setSizePolicy(QSizePolicy::Expanding,
                                           QSizePolicy::Expanding);
  m_layout->addStretch();
}

void
InfoWindow::initLabels()
{
  m_layout->addStretch();
  QLabel* licenseTitleLabel = new QLabel(tr("<u><b>License</b></u>"), this);
  licenseTitleLabel->setAlignment(Qt::AlignHCenter);
  m_layout->addWidget(licenseTitleLabel);
  QLabel* licenseLabel = new QLabel(QStringLiteral("GPLv3+"), this);
  licenseLabel->setAlignment(Qt::AlignHCenter);
  m_layout->addWidget(licenseLabel);
  m_layout->addStretch();

  QLabel* versionTitleLabel = new QLabel(tr("<u><b>Version</b></u>"), this);
  versionTitleLabel->setAlignment(Qt::AlignHCenter);
  m_layout->addWidget(versionTitleLabel);

  QString versionMsg = "Flameshot " + QStringLiteral(APP_VERSION) +
                       "\nCompiled with Qt " + QT_VERSION_STR;
  QLabel* versionLabel = new QLabel(versionMsg, this);
  versionLabel->setAlignment(Qt::AlignHCenter);
  m_layout->addWidget(versionLabel);
  m_layout->addStretch();
  m_layout->addSpacing(10);
  QLabel* shortcutsTitleLabel = new QLabel(tr("<u><b>Shortcuts</b></u>"), this);
  shortcutsTitleLabel->setAlignment(Qt::AlignHCenter);
  ;
  m_layout->addWidget(shortcutsTitleLabel);
}

void
InfoWindow::keyPressEvent(QKeyEvent* e)
{
  if (e->key() == Qt::Key_Escape) {
    close();
  }
}