jfjoch_viewer: Pressing "A" sets auto contrast

viewer/JFJochViewerWindow.cpp

@@ -328,6 +328,9 @@ JFJochViewerWindow::JFJochViewerWindow(QWidget *parent, bool dbus, const QString
     connect(this, &JFJochViewerWindow::adjustForegroundButton,
             viewer, &JFJochDiffractionImage::adjustForeground);
 
+    connect(this, &JFJochViewerWindow::setAutoForegroundOnce,
+            viewer, &JFJochDiffractionImage::setAutoForegroundOnce);
+
     if (!file.isEmpty())
         LoadFile(file, 0, 1, false);
 }
@@ -380,6 +383,11 @@ void JFJochViewerWindow::keyPressEvent(QKeyEvent *event) {
                 event->accept();
                 return;
         }
+        if (event->key() == Qt::Key_A && ! event->isAutoRepeat()) {
+                emit setAutoForegroundOnce();
+                event->accept();
+                return;
+        }
         QMainWindow::keyPressEvent(event);
 }
 

viewer/JFJochViewerWindow.h

@@ -47,6 +47,7 @@ signals:
     void LoadFileRequest(const QString &filename, qint64 image_number, qint64 summation, bool retry);
     void LoadImageRequest(int64_t image_number, int64_t summation);
     void adjustForegroundButton(bool input);
+    void setAutoForegroundOnce();
 };
 
 

viewer/image_viewer/JFJochDiffractionImage.cpp

@@ -342,14 +342,19 @@ void JFJochDiffractionImage::loadImage(std::shared_ptr<const JFJochReaderImage>
 
 void JFJochDiffractionImage::setAutoForeground(bool input) {
     auto_fg = input;
-    if (image && auto_fg) {
-        // If auto_foreground is not set, then view stays with the current settings till these are explicitly changed
+    // If auto_foreground is not set, then view stays with the current settings till these are explicitly changed
+    if (auto_fg)
+        setAutoForegroundOnce();
+    emit autoForegroundChanged(auto_fg);
+}
+
+void JFJochDiffractionImage::setAutoForegroundOnce() {
+    if (image) {
         foreground = image->GetAutoContrastValue();
         emit foregroundChanged(foreground);
         GeneratePixmap();
         Redraw();
     }
-    emit autoForegroundChanged(auto_fg);
 }
 
 void JFJochDiffractionImage::setResolutionRing(QVector<float> v) {

viewer/image_viewer/JFJochDiffractionImage.h

@@ -56,7 +56,7 @@ private:
 public slots:
     void loadImage(std::shared_ptr<const JFJochReaderImage> image);
     void setAutoForeground(bool input);
-
+    void setAutoForegroundOnce();
     void setResolutionRing(QVector<float> v);
     void setResolutionRingMode(RingMode mode);