simpleimageview.cpp

   1 #include "common.h"
   2 #include "simpleimageview.h"
   3
   4 #include <QDebug>
   5 #include <QKeyEvent>
   6 #include <QAction>
   7 #include <QMenu>
   8 #include <QSettings>
   9
  10 SimpleImageView::SimpleImageView(QWidget *parent) :
  11     QGraphicsView(parent),
  12     m_img(),
  13     m_back(NULL)
  14 {
  15     setContextMenuPolicy(Qt::DefaultContextMenu);
  16     m_back = new QAction(tr("戻る"), this);
  17     m_back->setObjectName("back");
  18
  19     QList<QKeySequence> shortcuts;
  20     shortcuts << QKeySequence("Return");
  21     shortcuts << QKeySequence("Backspace");
  22     m_back->setShortcuts(shortcuts);
  23
  24     connect(m_back, SIGNAL(triggered()), this, SLOT(back()));
  25 }
  26
  27 bool SimpleImageView::setSource(const QString &path)
  28 {
  29     qDebug() << "SimpleImageView::setSource()";
  30
  31     m_img = QPixmap(path);
  32
  33     emit fileInfo(QString("%1x%2x%3bpp")
  34                   .arg(m_img.width())
  35                   .arg(m_img.height())
  36                   .arg(m_img.depth()));
  37
  38     return !m_img.isNull();
  39 }
  40
  41 void SimpleImageView::back()
  42 {
  43     emit viewFinished();
  44 }
  45
  46 void SimpleImageView::paintEvent(QPaintEvent *)
  47 {
  48     qDebug() << "SimpleImageView::paintEvent();";
  49
  50     QPainter painter(viewport());
  51     QPixmap scaledImg;
  52
  53     if (m_img.width() < viewport()->width() &&
  54         m_img.height() < viewport()->height())
  55     {
  56         scaledImg = m_img;
  57     }
  58     else {
  59         scaledImg = m_img.scaled(viewport()->size(),
  60                                  Qt::KeepAspectRatio,
  61                                  Qt::SmoothTransformation);
  62     }
  63
  64     QSettings settings;
  65     painter.setBrush(settings.value(IniKey_ViewColorBgNormal).value<QColor>());
  66     painter.drawRect(viewport()->rect());
  67     painter.drawPixmap(
  68                 (viewport()->width() - scaledImg.width()) / 2,
  69                 (viewport()->height() - scaledImg.height()) / 2,
  70                 scaledImg);
  71 }
  72
  73 void SimpleImageView::keyPressEvent(QKeyEvent *event)
  74 {
  75     qDebug() << "SimpleImageView::keyPressEvent();";
  76
  77     QString ksq = KeyEventToSequence(event);
  78
  79     if (ProcessShortcut(ksq, this)) {
  80         event->accept();
  81         return;
  82     }
  83
  84     QGraphicsView::keyReleaseEvent(event);
  85
  86     // MainWindowへ
  87     event->ignore();
  88 }
  89
  90 void SimpleImageView::contextMenuEvent(QContextMenuEvent *event)
  91 {
  92     qDebug() << "SimpleImageView::contextMenuEvent();";
  93
  94     QMenu menu(this);
  95     menu.addAction(m_back);
  96     menu.exec(event->globalPos());
  97 }