jfjoch_viewer: fixes to pixel refine window

viewer/image_viewer/JFJochImage.cpp

@@ -752,9 +752,9 @@ void JFJochImage::writePixelLabels() {
                     if (std::abs(val - nearest) < 1e-6)
                         numBuf = QString::number(static_cast<qint64>(val));
                     else if (absVal < 1e4)
-                        numBuf = QString::number(val, 'f', 3);
+                        numBuf = QString::number(val, 'f', label_decimals_);
                     else
-                        numBuf = QString::number(val, 'f', 2);
+                        numBuf = QString::number(val, 'f', std::min(label_decimals_, 2));
                     pText = &numBuf;
                 } else {
                     numBuf = QString::number(val, 'e', 1);

viewer/image_viewer/JFJochImage.h

@@ -54,6 +54,12 @@ protected:
     bool initial_fit_done_ = false;
 
     QColor feature_color = Qt::magenta;
+
+    // Decimal places for non-integer per-pixel value labels. Float images (e.g. the
+    // PixelRefine prediction) are unreadable with many decimals, so subclasses can
+    // lower this.
+    int label_decimals_ = 3;
+
     float foreground = 10.0;
     float background = 0.0;
     ColorScale color_scale;

viewer/image_viewer/JFJochSimpleImage.cpp

@@ -18,6 +18,9 @@ JFJochSimpleImage::JFJochSimpleImage(QWidget *parent)
 
     // Keep overlays in pixel units independent of zoom (for labels font sizing)
     setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+
+    // The predicted/float image is unreadable with 3-decimal per-pixel labels.
+    label_decimals_ = 1;
 }
 
 void JFJochSimpleImage::setImage(std::shared_ptr<const SimpleImage> img) {

viewer/windows/JFJochPixelRefineWindow.cpp

@@ -109,6 +109,10 @@ JFJochPixelRefineWindow::JFJochPixelRefineWindow(QWidget *parent)
     });
 
     connect(m_refine, &QPushButton::clicked, this, [this] {
+        // Cancel any pending live-preview: otherwise a debounce armed by a slider
+        // move just before this click fires after the refine and overwrites the
+        // refined residual/preview with the stale pre-refine slider values.
+        m_debounce->stop();
         PixelRefineParams p = currentParams();
         p.max_iterations = 5;
         emit refineRequested(p);