Expose numeric trend segment formulas from native reconstruction models

python/set_devices/qt_ports/plot_annotations.py

@@ -0,0 +1,28 @@
+"""Small right-aligned mathematical annotations shared by Qt plots."""
+try:
+    from PySide6.QtCore import QRectF, Qt
+    from PySide6.QtGui import QColor
+except ImportError:
+    from PySide2.QtCore import QRectF, Qt
+    from PySide2.QtGui import QColor
+
+
+def paint_formulas(painter, rect, entries):
+    """Draw (color, text) entries in the right half, wrapping long formulas."""
+    painter.save()
+    painter.setClipRect(rect)
+    metrics = painter.fontMetrics()
+    width = max(1., rect.width() * .48 - 12)
+    top = rect.top() + 5
+    flags = int(Qt.AlignRight | Qt.AlignTop | Qt.TextWordWrap)
+    for color, text in entries:
+        box = QRectF(rect.right() - width - 6, top, width, max(1., rect.bottom() - top))
+        height = painter.boundingRect(box, flags, text).height()
+        box.setHeight(height)
+        painter.fillRect(box.adjusted(-3, -1, 3, 1), QColor('#0b1119'))
+        painter.setPen(QColor(color))
+        painter.drawText(box, flags, text)
+        top += height + metrics.height() * .4
+        if top >= rect.bottom():
+            break
+    painter.restore()