| 27 | """图片查看控件""" |
| 28 | |
| 29 | def __init__(self, *args, **kwargs): |
| 30 | image = kwargs.pop('image', None) |
| 31 | background = kwargs.pop('background', None) |
| 32 | super(BigImageView, self).__init__(*args, **kwargs) |
| 33 | self.setCursor(Qt.OpenHandCursor) |
| 34 | self.setBackground(background) |
| 35 | self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) |
| 36 | self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) |
| 37 | self.setRenderHints(QPainter.Antialiasing | QPainter.HighQualityAntialiasing | |
| 38 | QPainter.SmoothPixmapTransform) |
| 39 | self.setCacheMode(self.CacheBackground) |
| 40 | self.setViewportUpdateMode(self.SmartViewportUpdate) |
| 41 | self._item = QGraphicsPixmapItem() # 放置图像 |
| 42 | self._item.setFlags(QGraphicsPixmapItem.ItemIsFocusable | |
| 43 | QGraphicsPixmapItem.ItemIsMovable) |
| 44 | self._scene = QGraphicsScene(self) # 场景 |
| 45 | self.setScene(self._scene) |
| 46 | self._scene.addItem(self._item) |
| 47 | rect = QApplication.instance().desktop().availableGeometry() |
| 48 | self.resize(int(rect.width() * 2 / 3), int(rect.height() * 2 / 3)) |
| 49 | |
| 50 | self.pixmap = None |
| 51 | self._delta = 0.1 # 缩放 |
| 52 | self.setPixmap(image) |
| 53 | |
| 54 | def setBackground(self, color): |
| 55 | """设置背景颜色 |