helpwindow.cpp

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#include "helpwindow.h"

#include <QPushButton>
#include <QGridLayout>
#include <QAction>
#include <QLabel>
#include <QDebug>
#include <QApplication>
#include <QScreen>

#define ICON_SIZE (50)
#define ICON_SIZE_SMALL (32)

HelpWindow::HelpWindow(const QList<QAction*> &actions, QWidget *parent) :
   QDialog(parent)
{
   setWindowTitle(tr("Help"));
   int iconSize = ICON_SIZE;
   for (auto screen : qApp->screens()) {
      if (screen->geometry().height() < 900) {
         iconSize = ICON_SIZE_SMALL;
         break;
      }
   }
   auto *layout = new QGridLayout(this);
   layout->setSpacing(2);
   QSizePolicy sizePol(QSizePolicy::Minimum, QSizePolicy::Preferred);
   QList<QLabel*> wrapLabels;
   // Add help items
   int row = 0;
   for (QAction *action : actions) {
      if (action->icon().isNull() || action->text().isEmpty())
         continue;
      auto *icon = new QLabel(this);
      icon->setPixmap(action->icon().pixmap(iconSize, iconSize, QIcon::Normal, QIcon::Off));
      icon->setMinimumSize(iconSize + 5, iconSize + 2);
      layout->addWidget(icon, row, 0, 3, 1, Qt::AlignTop | Qt::AlignLeft);
      auto *headline = new QLabel(action->toolTip(), this);
      QFont boldFont = headline->font();
      boldFont.setBold(true);
      headline->setFont(boldFont);
      headline->setAlignment(Qt::AlignTop | Qt::AlignLeft);
      layout->addWidget(headline, row, 1, Qt::AlignTop);
      auto *description = new QLabel(action->text(), this);
      description->setWordWrap(true);
      description->setAlignment(Qt::AlignTop | Qt::AlignLeft);
      description->setSizePolicy(sizePol);
      wrapLabels.append(description);
      layout->addWidget(description, row + 1, 1, Qt::AlignTop);
      layout->setRowStretch(row + 2, 1);
      auto *line = new QFrame();
      line->setFrameShape(QFrame::HLine);
      line->setFrameShadow(QFrame::Sunken);
      layout->addWidget(line, row + 3, 0, 1, 2);
      row += 4;
   }
   layout->setColumnStretch(1, 1);
   // Add close button
   layout->setRowStretch(row++, 1000);
   auto *close = new QPushButton(tr("Close"), this);
   QFont bigFont = close->font();
   bigFont.setPointSize(20);
   close->setFont(bigFont);
   close->setDefault(true);
   connect(close, &QPushButton::clicked, this, &HelpWindow::hide);
   layout->addWidget(close, row++, 0, 1, 2);
   this->setFixedWidth(600);
   this->setSizePolicy(sizePol);
}