def setLine(self, line): """ Set the arrow base line (a `QLineF` in object coordinates). """ if self.__line != line: self.__line = line # local item coordinate system geom = self.geometry().translated(-self.pos()) if geom.isNull() and not line.isNull(): geom = QRectF(0, 0, 1, 1) arrow_shape = arrow_path_concave(line, self.lineWidth()) arrow_rect = arrow_shape.boundingRect() if not (geom.contains(arrow_rect)): geom = geom.united(arrow_rect) if self.__autoAdjustGeometry: # Shrink the geometry if required. geom = geom.intersected(arrow_rect) # topLeft can move changing the local coordinates. diff = geom.topLeft() line = QLineF(line.p1() - diff, line.p2() - diff) self.__arrowItem.setLine(line) self.__line = line # parent item coordinate system geom.translate(self.pos()) self.setGeometry(geom)
def exportAsImage(self): filename = unicode(QFileDialog.getSaveFileName(self, self.tr('Save Model As Image'), '', self.tr('PNG files (*.png *.PNG)'))) if not filename: return if not filename.lower().endswith('.png'): filename += '.png' totalRect = QRectF(0, 0, 1, 1) for item in self.scene.items(): totalRect = totalRect.united(item.sceneBoundingRect()) totalRect.adjust(-10, -10, 10, 10) img = QImage(totalRect.width(), totalRect.height(), QImage.Format_ARGB32_Premultiplied) img.fill(Qt.white) painter = QPainter() painter.setRenderHint(QPainter.Antialiasing) painter.begin(img) self.scene.render(painter, totalRect, totalRect) painter.end() img.save(filename)
def exportAsImage(self): filename = unicode( QFileDialog.getSaveFileName(self, self.tr('Save Model As Image'), '', self.tr('PNG files (*.png *.PNG)'))) if not filename: return if not filename.lower().endswith('.png'): filename += '.png' totalRect = QRectF(0, 0, 1, 1) for item in self.scene.items(): totalRect = totalRect.united(item.sceneBoundingRect()) totalRect.adjust(-10, -10, 10, 10) img = QImage(totalRect.width(), totalRect.height(), QImage.Format_ARGB32_Premultiplied) img.fill(Qt.white) painter = QPainter() painter.setRenderHint(QPainter.Antialiasing) painter.begin(img) self.scene.render(painter, totalRect, totalRect) painter.end() img.save(filename)
def resize_scene_rect(self): # Check if we are QGraphicsItem and if we are on scene if(not callable(self.scene) or self.scene() == None): return # TODO: A place for optimization? rect = QRectF(self.scene().sceneRect()) self.scene().setSceneRect(rect.united(self.globalBoundingRect()))
def adjustGeometry(self): """ Adjust the widget geometry to exactly fit the arrow inside while preserving the arrow path scene geometry. """ # local system coordinate geom = self.geometry().translated(-self.pos()) line = self.__line arrow_rect = self.__arrowItem.shape().boundingRect() if geom.isNull() and not line.isNull(): geom = QRectF(0, 0, 1, 1) if not (geom.contains(arrow_rect)): geom = geom.united(arrow_rect) geom = geom.intersected(arrow_rect) diff = geom.topLeft() line = QLineF(line.p1() - diff, line.p2() - diff) geom.translate(self.pos()) self.setGeometry(geom) self.setLine(line)