Watching current dir for changes to reload file list

imageringlist.cpp

@@ -70,6 +70,7 @@ void Image::imageLoaded(QImage img)
 
 ImageRingList::ImageRingList(QObject *parent) : QObject(parent)
 {
+    connect(&m_fileSystemWatcher, SIGNAL(directoryChanged(QString)), this, SLOT(dirChanged(QString)));
 }
 
 bool ImageRingList::setDir(const QString path, const QString &currentFile)
@@ -88,39 +89,14 @@ bool ImageRingList::setDir(const QString path, const QString &currentFile)
             absolutePaths.append(dir.absoluteFilePath(file));
         }
         setFiles(absolutePaths, currentFile);
+
+        m_fileSystemWatcher.removePaths(m_fileSystemWatcher.directories());
+        m_fileSystemWatcher.addPath(path);
         return true;
     }
     return false;
 }
 
-void ImageRingList::setFiles(const QStringList files, const QString &currentFile)
-{
-    m_images.clear();
-    foreach(const QString &file, files)
-    {
-        ImagePtr ptr = make_shared<Image>(file);
-        connect(ptr.get(), SIGNAL(pixmapLoaded(Image*)), this, SLOT(imageLoaded(Image*)));
-        m_images.append(ptr);
-    }
-
-    int index = files.indexOf(currentFile);
-    if(index < 0)
-        index = 0;
-
-    m_firstImage = m_currImage = m_lastImage = m_images.begin()+index;
-    (*m_currImage)->load();
-
-    m_width = DEFAULT_WIDTH<m_images.size()/2 ? DEFAULT_WIDTH : m_images.size()/2;
-
-    for(int i=0; i<m_width; i++)
-    {
-        m_firstImage = decrement(m_firstImage);
-        (*m_firstImage)->load();
-        m_lastImage = increment(m_lastImage);
-        (*m_lastImage)->load();
-    }
-}
-
 void ImageRingList::setFile(const QString &file)
 {
     QFileInfo info(file);
@@ -161,6 +137,34 @@ void ImageRingList::decrement()
     }
 }
 
+void ImageRingList::setFiles(const QStringList files, const QString &currentFile)
+{
+    m_images.clear();
+    foreach(const QString &file, files)
+    {
+        ImagePtr ptr = make_shared<Image>(file);
+        connect(ptr.get(), SIGNAL(pixmapLoaded(Image*)), this, SLOT(imageLoaded(Image*)));
+        m_images.append(ptr);
+    }
+
+    int index = files.indexOf(currentFile);
+    if(index < 0)
+        index = 0;
+
+    m_firstImage = m_currImage = m_lastImage = m_images.begin()+index;
+    (*m_currImage)->load();
+
+    m_width = DEFAULT_WIDTH<m_images.size()/2 ? DEFAULT_WIDTH : m_images.size()/2;
+
+    for(int i=0; i<m_width; i++)
+    {
+        m_firstImage = decrement(m_firstImage);
+        (*m_firstImage)->load();
+        m_lastImage = increment(m_lastImage);
+        (*m_lastImage)->load();
+    }
+}
+
 QList<ImagePtr>::iterator ImageRingList::increment(QList<ImagePtr>::iterator iter)
 {
     iter++;
@@ -184,3 +188,14 @@ void ImageRingList::imageLoaded(Image *image)
         emit pixmapLoaded(image->pixmap());
     }
 }
+
+void ImageRingList::dirChanged(QString dir)
+{
+    QString currentFile;
+
+    if(m_images.size())
+        currentFile = (*m_currImage)->name();
+
+    setDir(dir, currentFile);
+    emit currentImageChanged();
+}

imageringlist.h

@@ -36,21 +36,24 @@ class ImageRingList : public QObject
     QList<ImagePtr>::iterator m_firstImage;
     QList<ImagePtr>::iterator m_currImage;
     QList<ImagePtr>::iterator m_lastImage;
+    QFileSystemWatcher m_fileSystemWatcher;
 public:
     explicit ImageRingList(QObject *parent = 0);
     bool setDir(const QString path, const QString &currentFile = QString());
-    void setFiles(const QStringList files, const QString &currentFile = QString());
     void setFile(const QString &file);
     ImagePtr currentImage();
     void increment();
     void decrement();
 protected:
+    void setFiles(const QStringList files, const QString &currentFile = QString());
     QList<ImagePtr>::iterator increment(QList<ImagePtr>::iterator iter);
     QList<ImagePtr>::iterator decrement(QList<ImagePtr>::iterator iter);
 signals:
     void pixmapLoaded(QPixmap pix);
+    void currentImageChanged();
 protected slots:
     void imageLoaded(Image *image);
+    void dirChanged(QString dir);
 };
 
 #endif // IMAGERINGLIST_H

mainwindow.cpp

@@ -20,6 +20,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
 
     m_ringList = new ImageRingList(this);
     connect(m_ringList, SIGNAL(pixmapLoaded(QPixmap)), this, SLOT(pixmapLoaded(QPixmap)));
+    connect(m_ringList, SIGNAL(currentImageChanged()), this, SLOT(updateWindowTitle()));
 
     QMenu *fileMenu = new QMenu(tr("File"), this);
     fileMenu->addAction(tr("Open"), this, SLOT(openFile()), QKeySequence("Ctrl+O"));
@@ -90,7 +91,7 @@ void MainWindow::openFile()
     if(standardLocations.size())
         path = standardLocations.first();
 
-    QString file = QFileDialog::getOpenFileName(this, tr("Open file"), path, tr("Images (*.jpg *.png)"));
+    QString file = QFileDialog::getOpenFileName(this, tr("Open file"), path, tr("Images (*.jpg *.png *.JPG *.PNG)"));
     if(!file.isEmpty())
     {
         QFileInfo info(file);

mainwindow.h

@@ -20,8 +20,8 @@ public:
 protected:
     void keyPressEvent(QKeyEvent *event);
     void keyReleaseEvent(QKeyEvent *event);
-    void updateWindowTitle();
 protected slots:
+    void updateWindowTitle();
     void pixmapLoaded(QPixmap pix);
     void openFile();
     void markImage();