Add simple live mode that show last image added to directory

imageringlist.cpp

@@ -94,6 +94,7 @@ void Image::imageLoaded(QImage img)
 }
 
 ImageRingList::ImageRingList(QObject *parent) : QObject(parent)
+  , m_liveMode(false)
 {
     connect(&m_fileSystemWatcher, SIGNAL(directoryChanged(QString)), this, SLOT(dirChanged(QString)));
 }
@@ -107,13 +108,13 @@ bool ImageRingList::setDir(const QString path, const QString &currentFile)
         QStringList nameFilter;
         nameFilter << "*.jpg" << "*.png" << "*.cr2";
 
-        QStringList list = dir.entryList(nameFilter, QDir::Files | QDir::Readable, QDir::Name);
+        QStringList list = dir.entryList(nameFilter, QDir::Files | QDir::Readable, m_liveMode ? QDir::Time : QDir::Name);
         QStringList absolutePaths;
         foreach(const QString &file, list)
         {
             absolutePaths.append(dir.absoluteFilePath(file));
         }
-        setFiles(absolutePaths, currentFile);
+        setFiles(absolutePaths, m_liveMode ? list.first() : currentFile);
 
         m_fileSystemWatcher.removePaths(m_fileSystemWatcher.directories());
         m_fileSystemWatcher.addPath(path);
@@ -162,6 +163,11 @@ void ImageRingList::decrement()
     }
 }
 
+void ImageRingList::setLiveMode(bool live)
+{
+    m_liveMode = live;
+}
+
 void ImageRingList::setFiles(const QStringList files, const QString &currentFile)
 {
     m_images.clear();

imageringlist.h

@@ -37,6 +37,7 @@ class ImageRingList : public QObject
     QList<ImagePtr>::iterator m_currImage;
     QList<ImagePtr>::iterator m_lastImage;
     QFileSystemWatcher m_fileSystemWatcher;
+    bool m_liveMode;
 public:
     explicit ImageRingList(QObject *parent = 0);
     bool setDir(const QString path, const QString &currentFile = QString());
@@ -44,6 +45,7 @@ public:
     ImagePtr currentImage();
     void increment();
     void decrement();
+    void setLiveMode(bool live);
 protected:
     void setFiles(const QStringList files, const QString &currentFile = QString());
     QList<ImagePtr>::iterator increment(QList<ImagePtr>::iterator iter);

mainwindow.cpp

@@ -34,6 +34,8 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
     QMenu *fileMenu = new QMenu(tr("File"), this);
     fileMenu->addAction(tr("Open"), this, SLOT(openFile()), QKeySequence("Ctrl+O"));
     fileMenu->addAction(tr("Copy marked files"), this, SLOT(copyMarked()));
+    QAction *liveModeAction = fileMenu->addAction(tr("Live mode"), this, SLOT(liveMode(bool)));
+    liveModeAction->setCheckable(true);
     fileMenu->addAction(tr("Exit"), this, SLOT(close()));
     menuBar()->addMenu(fileMenu);
 
@@ -225,6 +227,11 @@ void MainWindow::copyMarked()
     }
 }
 
+void MainWindow::liveMode(bool active)
+{
+    m_ringList->setLiveMode(active);
+}
+
 void MainWindow::updateWindowTitle()
 {
     ImagePtr ptr = m_ringList->currentImage();

mainwindow.h

@@ -35,6 +35,7 @@ protected slots:
     void markAndNext();
     void unmarkAndNext();
     void copyMarked();
+    void liveMode(bool active);
 };
 
 #endif // MAINWINDOW_H