diff options
Diffstat (limited to 'src/main/python/utils/graphics.py')
| -rw-r--r-- | src/main/python/utils/graphics.py | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/src/main/python/utils/graphics.py b/src/main/python/utils/graphics.py index 9e1f690..aed7eed 100644 --- a/src/main/python/utils/graphics.py +++ b/src/main/python/utils/graphics.py @@ -1,15 +1,26 @@ from PyQt5.QtCore import Qt from PyQt5.QtWidgets import QGraphicsView + class customView(QGraphicsView): - def __init__(self, scene, parent=None): - super(customView, self).__init__(scene, parent) + def __init__(self, scene = None, parent=None): + if scene is not None: + super(customView, self).__init__(scene, parent) + else: + super(customView, self).__init__(parent) self.zoom = 1 + self.setDragMode(True) def wheelEvent(self, QWheelEvent): if Qt.ControlModifier: - self.zoom += QWheelEvent.angleDelta().y()/2880 - self.scale(self.zoom, self.zoom) + temp = self.zoom + if QWheelEvent.source() == Qt.MouseEventNotSynthesized: + if self.zoom + QWheelEvent.angleDelta().y()/2880 > 0.1: + self.zoom += QWheelEvent.angleDelta().y()/2880 + else: + if self.zoom + QWheelEvent.pixelDelta().y() > 0.1: + self.zoom += QWheelEvent.angleDelta().y() + self.scale(self.zoom / temp, self.zoom / temp) QWheelEvent.accept() else: return super().wheelEvent(self, QWheelEvent)
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