Better folder organization

src/fixed_aspect_ratio_widget.py

@@ -0,0 +1,26 @@
+from PyQt5.QtWidgets import QWidget
+from PyQt5.QtCore import QSize
+
+
+class FixedAspectRatioWidget(QWidget):
+    """Subclass QWidget. Keep all the internal labels to a fixed aspect ratio."""
+
+    SPACE = 10
+
+    def __init__(self, parent=None):
+        """Initialize the instance."""
+        super().__init__(parent)
+        self.labels = []
+
+    def resizeEvent(self, event):
+        """Override QWidget.resizeEvent. Rescale all the internal widgets."""
+        h, w = self.height(), self.width()
+        h_lbl = h / 9 - self.SPACE
+        w_lbl = 5 * h_lbl
+        w_pad = w - 10
+        if w_lbl > w_pad:
+            w_lbl = w_pad
+            h_lbl = w_pad / 5
+
+        for label in self.labels:
+            label.rescale(QSize(w_lbl, h_lbl))