def boundingRect(self):
anchor = self.mapFromParent(self._chart.mapToPosition(self._anchor))
rect = QRectF()
rect.setLeft(min(self._rect.left(), anchor.x()))
rect.setRight(max(self._rect.right(), anchor.x()))
rect.setTop(min(self._rect.top(), anchor.y()))
rect.setBottom(max(self._rect.bottom(), anchor.y()))
return rect
def drag_rect(self, pos):
# Calculate how much the mouse has moved since the click.
x_diff = pos.x() - self.mouse_press_pos.x()
y_diff = pos.y() - self.mouse_press_pos.y()
# Start with the rectangle as it was when clicked.
rect = QRectF(self.mouse_press_rect)
# Then adjust by the distance the mouse moved.
if self.selected_handle is None:
rect.translate(x_diff, y_diff)
elif self.selected_handle == self.HANDLE_TOP_LEFT:
rect.adjust(x_diff, y_diff, 0, 0)
elif self.selected_handle == self.HANDLE_TOP:
rect.setTop(rect.top() + y_diff)
elif self.selected_handle == self.HANDLE_TOP_RIGHT:
rect.setTop(rect.top() + y_diff)
rect.setRight(rect.right() + x_diff)
elif self.selected_handle == self.HANDLE_LEFT:
rect.setLeft(rect.left() + x_diff)
elif self.selected_handle == self.HANDLE_RIGHT:
rect.setRight(rect.right() + x_diff)
elif self.selected_handle == self.HANDLE_BOTTOM_LEFT:
rect.setBottom(rect.bottom() + y_diff)
rect.setLeft(rect.left() + x_diff)
elif self.selected_handle == self.HANDLE_BOTTOM:
rect.setBottom(rect.bottom() + y_diff)
elif self.selected_handle == self.HANDLE_BOTTOM_RIGHT:
rect.setBottom(rect.bottom() + y_diff)
rect.setRight(rect.right() + x_diff)
return rect