Allow change of thumbnail size without restart

imageringlist.cpp

@@ -76,6 +76,11 @@ int Image::number() const
     return m_number;
 }
 
+void Image::clearThumbnail()
+{
+    m_thumbnail.reset();
+}
+
 void Image::imageLoaded(void *rawImage, ImageInfoData info)
 {
     m_loading = false;
@@ -284,6 +289,12 @@ void ImageRingList::updateMark()
     }
 }
 
+void ImageRingList::clearThumbnails()
+{
+    for(auto &img : m_images)
+        img->clearThumbnail();
+}
+
 QModelIndex ImageRingList::index(int row, int column, const QModelIndex &parent) const
 {
     return createIndex(row, column, m_images.at(row).get());

imageringlist.h

@@ -35,6 +35,7 @@ public:
     ImageInfoData info() const;
     bool isCurrent() const;
     int number() const;
+    void clearThumbnail();
 signals:
     void pixmapLoaded(Image *ptr);
     void thumbnailLoaded(Image *ptr);
@@ -80,6 +81,7 @@ public:
     int imageCount() const;
     QStringList imageNames() const;
     void updateMark();
+    void clearThumbnails();
 
     QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
     QModelIndex parent(const QModelIndex &child) const override;

mainwindow.cpp

@@ -155,6 +155,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
     viewMenu->addAction(tr("100%"), m_imageGL, SLOT(oneToOne()));
     viewMenu->addAction(tr("Fullscreen"), this, SLOT(toggleFullScreen()), Qt::CTRL + Qt::Key_F11);
     QAction *thumbnailsAction = viewMenu->addAction(tr("Thumbnails"), [this](bool checked){
+        if(SettingsDialog::loadThumbsizes())m_ringList->clearThumbnails();
         m_imageGL->imageWidget()->allocateThumbnails(m_ringList->imageNames());
         m_imageGL->imageWidget()->showThumbnail(checked);
         m_imageGL->setThumbnails(checked ? m_ringList->imageCount() : 0);

settingsdialog.cpp

@@ -75,6 +75,16 @@ void SettingsDialog::loadSettings()
     QApplication::setAttribute(Qt::AA_DontUseNativeDialogs, settings.value("settings/dontusenativedialogs", false).toBool());
 }
 
+bool SettingsDialog::loadThumbsizes()
+{
+    QSettings settings;
+    int OLD_THUMB_SIZE = THUMB_SIZE;
+    THUMB_SIZE = settings.value("settings/thumbnailsize", THUMB_SIZE).toInt();
+    THUMB_SIZE_BORDER = THUMB_SIZE + 10;
+    THUMB_SIZE_BORDER_Y = THUMB_SIZE + 30;
+    return OLD_THUMB_SIZE != THUMB_SIZE;
+}
+
 void SettingsDialog::saveSettings()
 {
     QSettings settings;

settingsdialog.h

@@ -11,6 +11,7 @@ class SettingsDialog : public QDialog
 public:
     explicit SettingsDialog(QWidget *parent = nullptr);
     static void loadSettings();
+    static bool loadThumbsizes();
 private:
     void saveSettings();