for QtPainter use with context

Author: rgerum

saenopy/gui/code/code_editor.py

@@ -82,24 +82,24 @@ def highlightCurrentLine(self):
         self.setExtraSelections(extraSelections)
 
     def lineNumberAreaPaintEvent(self, event):
-        painter = QtGui.QPainter(self.lineNumberArea)
-        painter.fillRect(event.rect(), lineNumbersBackgroundColor)
-        block = self.firstVisibleBlock()
-        blockNumber = block.blockNumber()
-        top = round(self.blockBoundingGeometry(block).translated(self.contentOffset()).top())
-        bottom = top + round(self.blockBoundingRect(block).height())
-
-        while block.isValid() and top <= event.rect().bottom():
-            if block.isVisible() and bottom >= event.rect().top():
-                number = str(blockNumber + 1)
-                if blockNumber == self.textCursor().blockNumber():
-                    painter.fillRect(QtCore.QRect(0, top, self.lineNumberArea.width()+10, self.fontMetrics().height()), lineColor)
-
-                painter.setPen(QtGui.QColor(lineNumbersTextColor))
-                painter.drawText(0, top, self.lineNumberArea.width()-lineNumbersRightMargin, self.fontMetrics().height(),
-                                 QtCore.Qt.AlignRight, number)
-
-            block = block.next()
-            top = bottom
+        with QtGui.QPainter(self.lineNumberArea) as painter:
+            painter.fillRect(event.rect(), lineNumbersBackgroundColor)
+            block = self.firstVisibleBlock()
+            blockNumber = block.blockNumber()
+            top = round(self.blockBoundingGeometry(block).translated(self.contentOffset()).top())
             bottom = top + round(self.blockBoundingRect(block).height())
-            blockNumber += 1
+
+            while block.isValid() and top <= event.rect().bottom():
+                if block.isVisible() and bottom >= event.rect().top():
+                    number = str(blockNumber + 1)
+                    if blockNumber == self.textCursor().blockNumber():
+                        painter.fillRect(QtCore.QRect(0, top, self.lineNumberArea.width()+10, self.fontMetrics().height()), lineColor)
+
+                    painter.setPen(QtGui.QColor(lineNumbersTextColor))
+                    painter.drawText(0, top, self.lineNumberArea.width()-lineNumbersRightMargin, self.fontMetrics().height(),
+                                     QtCore.Qt.AlignRight, number)
+
+                block = block.next()
+                top = bottom
+                bottom = top + round(self.blockBoundingRect(block).height())
+                blockNumber += 1

saenopy/gui/common/QtShortCuts.py

@@ -1306,10 +1306,10 @@ def paintEvent(self, event):
 
         opt = QtWidgets.QStyleOption()
         opt.initFrom(self)
-        painter = QtGui.QPainter(self)
+        with QtGui.QPainter(self) as painter:
 
-        self.style().drawPrimitive(QtWidgets.QStyle.PE_Widget, opt, painter, self)
+            self.style().drawPrimitive(QtWidgets.QStyle.PE_Widget, opt, painter, self)
 
-        self.style().drawItemText(painter, self.rect(),
-                                  self.textalignment, self.palette(), True, self.text())
+            self.style().drawItemText(painter, self.rect(),
+                                      self.textalignment, self.palette(), True, self.text())
 

saenopy/gui/common/gui_classes.py

@@ -252,14 +252,14 @@ def __init__(self, parent=None, title='', animationDuration=300, url=None):
         self.toggleButton.valueChanged.connect(self.changedActive)
 
     def paintEvent(self, ev: QtGui.QPaintEvent) -> None:
-        p = QtGui.QPainter(self)
-        p.setPen(QtGui.QPen(QtGui.QColor("gray")))
-        #p.setBrush(QtGui.QBrush(QtGui.QColor("gray")))
-        top = 5
-        p.drawRect(0, self.height()-1, self.width(), 0)
-        p.drawRect(0, top, 0, self.height())
-        p.drawRect(0, top, 7, 0)
-        p.drawRect(self.width()-1, top, 0, self.height())
+        with QtGui.QPainter(self) as p:
+            p.setPen(QtGui.QPen(QtGui.QColor("gray")))
+            #p.setBrush(QtGui.QBrush(QtGui.QColor("gray")))
+            top = 5
+            p.drawRect(0, self.height()-1, self.width(), 0)
+            p.drawRect(0, top, 0, self.height())
+            p.drawRect(0, top, 7, 0)
+            p.drawRect(self.width()-1, top, 0, self.height())
         super().paintEvent(ev)
 
     def toggle(self):

saenopy/gui/spheroid/modules/QSlider.py

@@ -21,15 +21,15 @@ def paintEvent(self, ev: QtGui.QPaintEvent) -> None:
         super().paintEvent(ev)
 
     def drawRect(self, start, end, color, border):
-        p = QtGui.QPainter(self)
-        p.setPen(QtGui.QPen(QtGui.QColor("transparent")))
-        p.setBrush(QtGui.QBrush(QtGui.QColor(color)))
-
-        if (self.min is not None) and (end != "None") and (start != "None"):
-            s = self.width() * (start - self.minimum()) / (self.maximum() - self.minimum() + 1e-5)
-            e = self.width() * (end - self.minimum()) / (self.maximum() - self.minimum() + 1e-5)
-            p.drawRect(int(s), int(self.height() * border),
-                       int(e - s), int(self.height() * (1 - border * 2)))
+        with QtGui.QPainter(self) as p:
+            p.setPen(QtGui.QPen(QtGui.QColor("transparent")))
+            p.setBrush(QtGui.QBrush(QtGui.QColor(color)))
+
+            if (self.min is not None) and (end != "None") and (start != "None"):
+                s = self.width() * (start - self.minimum()) / (self.maximum() - self.minimum() + 1e-5)
+                e = self.width() * (end - self.minimum()) / (self.maximum() - self.minimum() + 1e-5)
+                p.drawRect(int(s), int(self.height() * border),
+                           int(e - s), int(self.height() * (1 - border * 2)))
 
     def setEvaluated(self, value):
         self.evaluated = value