1 files changed, 37 insertions, 0 deletions
diff --git a/doc/codesnippets/doc/src/snippets/code/src_gui_effects_qgraphicseffect.cpp b/doc/codesnippets/doc/src/snippets/code/src_gui_effects_qgraphicseffect.cpp
new file mode 100644
index 000000000..c5d4809bb
--- /dev/null
+++ b/doc/codesnippets/doc/src/snippets/code/src_gui_effects_qgraphicseffect.cpp
@@ -0,0 +1,37 @@
+//! [0]
+def draw(self, painter):
+    # Fully opaque draw directly without going through a pixmap.
+    if qFuzzyCompare(self.opacity, 1):
+        drawSource(painter)
+        return
+    # ...
+//! [0]
+
+//! [1]
+def draw(self, painter):
+    # ...
+    offset = QPoint()
+    if self.sourceIsPixmap():
+        # No point in drawing in device coordinates (pixmap will be scaled anyways).
+        pixmap = sourcePixmap(Qt.LogicalCoordinates, offset)
+        ...
+        painter.drawPixmap(offset, pixmap)
+    else:
+        # Draw pixmap in device coordinates to avoid pixmap scaling
+        pixmap = sourcePixmap(Qt.DeviceCoordinates, offset)
+        painter.setWorldTransform(QTransform())
+        # ...
+        painter.drawPixmap(offset, pixmap)
+    # ...
+//! [1]
+
+//! [2]
+# ...
+alphaGradient = QLinearGradient(rect.topLeft(), rect.bottomLeft())
+alphaGradient.setColorAt(0.0, Qt.transparent)
+alphaGradient.setColorAt(0.5, Qt.black)
+alphaGradient.setColorAt(1.0, Qt.transparent)
+effect = QGraphicsOpacityEffect()
+effect.setOpacityMask(alphaGradient)
+# ...
+//! [2]