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# Copyright (C) 2024 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from PySide6.QtCharts import QChart, QChartView
from PySide6.QtGui import QKeyEvent, QMouseEvent
from PySide6.QtCore import QEvent, Qt
from PySide6.QtWidgets import QGraphicsView
class ChartView(QChartView):
def __init__(self, chart, parent=None):
super().__init__(chart, parent)
self.setRubberBand(QChartView.RectangleRubberBand)
self._isTouching = False
def viewPortEvent(self, event: QEvent):
if event.type() == QMouseEvent.TouchBegin:
self._isTouching = True
self.chart().setAnimationOptions(QChart.NoAnimation)
return super().viewPortEvent(event)
def mousePressEvent(self, event: QMouseEvent):
if self._isTouching:
return
return super().mousePressEvent(event)
def mouseMoveEvent(self, event: QMouseEvent):
if self._isTouching:
return
return super().mouseMoveEvent(event)
def mouseReleaseEvent(self, event: QMouseEvent):
if self._isTouching:
self._isTouching = False
self.chart().setAnimationOptions(QChart.SeriesAnimations)
return super().mouseReleaseEvent(event)
def keyPressEvent(self, event: QKeyEvent):
key = event.key()
if key == Qt.Key_Plus:
self.chart().zoomIn()
elif key == Qt.Key_Minus:
self.chart().zoomOut()
elif key == Qt.Key_Left:
self.chart().scroll(-10, 0)
elif key == Qt.Key_Right:
self.chart().scroll(10, 0)
elif key == Qt.Key_Up:
self.chart().scroll(0, 10)
elif key == Qt.Key_Down:
self.chart().scroll(0, -10)
else:
QGraphicsView.keyPressEvent(event)
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