Enhance font rendering for rotated text in QwtPlainTextEngine

Author: PierreRaybaut

CHANGELOG.md

@@ -1,5 +1,9 @@
 # PythonQwt Releases
 
+## Version 0.14.7
+
+- Improved font rendering for rotated text in `QwtPlainTextEngine.draw` method: disabled font hinting to avoid character misalignment in rotated text
+
 ## Version 0.14.6
 
 - Fixed [Issue #100](https://github.com/PlotPyStack/PythonQwt/issues/100) - TypeError in `QwtSymbol.drawSymbol` method due to outdated `renderSymbols` call

qwt/__init__.py

@@ -55,7 +55,7 @@
 from qwt.text import QwtText  # noqa: F401
 from qwt.toqimage import array_to_qimage as toQImage  # noqa: F401
 
-__version__ = "0.14.6"
+__version__ = "0.14.7"
 QWT_VERSION_STR = "6.1.5"
 
 

qwt/tests/test_cpudemo.py

@@ -195,7 +195,7 @@ def statistic(self):
         return 100.0 * userDelta / totalDelta, 100.0 * systemDelta / totalDelta
 
     def upTime(self):
-        result = QTime()
+        result = QTime(0, 0, 0)
         for item in self.procValues:
             result = result.addSecs(int(0.01 * item))
         return result

qwt/text.py

@@ -333,6 +333,13 @@ def draw(self, painter, rect, flags, text):
         :param str text: Text to be rendered
         """
         painter.save()
+
+        # Get and configure font for better rendering of rotated text
+        font = painter.font()
+        # Disable hinting to avoid character misalignment in rotated text
+        font.setHintingPreference(QFont.PreferNoHinting)
+        painter.setFont(font)
+
         qwtUnscaleFont(painter)
         painter.drawText(rect, flags, text)
         painter.restore()