def update_canvas(self):
""" """
w, h = self.parent.size().width(), self.parent.size().height()
self.path_full = QPainterPath()
self.path_subtract = QPainterPath()
self.path_decoration = QPainterPath()
self.region_mask = QRegion(0, 0, w, h)
self.path_full.addRect(0, 0, w, h)
# Add the path
if self.widgets is not None:
for widget in self.widgets:
temp_path = QPainterPath()
# if widget is not found... find more general way to handle
if widget is not None:
widget.raise_()
widget.show()
geo = widget.frameGeometry()
width, height = geo.width(), geo.height()
point = widget.mapTo(self.parent, QPoint(0, 0))
x, y = point.x(), point.y()
temp_path.addRect(QRectF(x, y, width, height))
temp_region = QRegion(x, y, width, height)
if self.interaction_on:
self.region_mask = self.region_mask.subtracted(temp_region)
self.path_subtract = self.path_subtract.united(temp_path)
self.path_current = self.path_full.subtracted(self.path_subtract)
else:
self.path_current = self.path_full
if self.decoration is not None:
for widget in self.decoration:
temp_path = QPainterPath()
widget.raise_()
widget.show()
geo = widget.frameGeometry()
width, height = geo.width(), geo.height()
point = widget.mapTo(self.parent, QPoint(0, 0))
x, y = point.x(), point.y()
temp_path.addRect(QRectF(x, y, width, height))
temp_region_1 = QRegion(x - 1, y - 1, width + 2, height + 2)
temp_region_2 = QRegion(x + 1, y + 1, width - 2, height - 2)
temp_region = temp_region_1.subtracted(temp_region_2)
if self.interaction_on:
self.region_mask = self.region_mask.united(temp_region)
self.path_decoration = self.path_decoration.united(temp_path)
else:
self.path_decoration.addRect(0, 0, 0, 0)
# Add a decoration stroke around widget
self.setMask(self.region_mask)
self.update()
self.repaint()
