class TextItem(QObject): def __init__(self, text, scene, dimensions, transform_fn): """\ transform_fn(dimensions, w, h): returns a QTransform * dimensions: plotter dimension object * w: text width in pixels * h: text height in pixels """ QObject.__init__(self) self.text = text self.scene = scene self.dimensions = dimensions self.transform = transform_fn self.text_item = None self.rect = None for signal in text.changed, dimensions.changed: signal.connect(self.update) self.update() def update(self): # Delete previous text item if self.text_item != None: self.scene.removeItem(self.text_item) # Line below not for QGraphicsSimpleTextItem self.text_item.deleteLater() self.scene.removeItem(self.rect) # Exit if any parameters unset if self.text.text == None or self.text.style == None: return self.text_item = self.get_text_item() size = self.text_item.boundingRect() w = size.width() h = size.height() transform = self.transform(self.dimensions, w, h) self.text_item.setTransform(transform) self.scene.addItem(self.text_item) self.rect = QGraphicsRectItem(0,0, w,h) self.rect.setTransform(transform) if config.debug.plotter.show_text_boxes: self.scene.addItem(self.rect) def get_text_item(self): text_item = QGraphicsTextItem(self.text.text, None) text_item.setDefaultTextColor(self.text.style.colour) # QGraphicsTextItem #text_item.setPen(self.text.style.colour) # QGraphicsSimpleTextItem text_item.setFont(self.text.style.font) text_item.setPos(0,0) return text_item
