剧中适应 :param rect: 矩形范围 :param flags: :return:
(self, rect, flags=Qt.IgnoreAspectRatio)
| 91 | self.setSceneRect(QRectF(QPointF(0, 0), QPointF(self.pixmap.width(), self.pixmap.height()))) |
| 92 | |
| 93 | def fitInView(self, rect, flags=Qt.IgnoreAspectRatio): |
| 94 | """剧中适应 |
| 95 | :param rect: 矩形范围 |
| 96 | :param flags: |
| 97 | :return: |
| 98 | """ |
| 99 | if not self.scene() or rect.isNull(): |
| 100 | return |
| 101 | unity = self.transform().mapRect(QRectF(0, 0, 1, 1)) |
| 102 | self.scale(1 / unity.width(), 1 / unity.height()) |
| 103 | viewRect = self.viewport().rect() |
| 104 | sceneRect = self.transform().mapRect(rect) |
| 105 | x_ratio = viewRect.width() / sceneRect.width() |
| 106 | y_ratio = viewRect.height() / sceneRect.height() |
| 107 | if flags == Qt.KeepAspectRatio: |
| 108 | x_ratio = y_ratio = min(x_ratio, y_ratio) |
| 109 | elif flags == Qt.KeepAspectRatioByExpanding: |
| 110 | x_ratio = y_ratio = max(x_ratio, y_ratio) |
| 111 | self.scale(x_ratio, y_ratio) |
| 112 | self.centerOn(rect.center()) |
| 113 | |
| 114 | def wheelEvent(self, event): |
| 115 | if event.angleDelta().y() > 0: |