class View(QGraphicsView):
def __init__(self, parent=None):
super().__init__(QGraphicsScene(), parent)
self.m_tooltip = None
self.m_callouts = []
self.setDragMode(QGraphicsView.NoDrag)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# chart
self.m_chart = QChart()
self.m_chart.setMinimumSize(640, 480)
self.m_chart.setTitle(
"Hover the line to show callout. Click the line to make it stay"
)
self.m_chart.legend().hide()
series = QLineSeries()
series.append(1, 3)
series.append(4, 5)
series.append(5, 4.5)
series.append(7, 1)
series.append(11, 2)
self.m_chart.addSeries(series)
series2 = QSplineSeries()
series2.append(1.6, 1.4)
series2.append(2.4, 3.5)
series2.append(3.7, 2.5)
series2.append(7, 4)
series2.append(10, 2)
self.m_chart.addSeries(series2)
self.m_chart.createDefaultAxes()
self.m_chart.setAcceptHoverEvents(True)
self.setRenderHint(QPainter.Antialiasing)
self.scene().addItem(self.m_chart)
self.m_coordX = QGraphicsSimpleTextItem(self.m_chart)
self.m_coordX.setPos(
self.m_chart.size().width() / 2 - 50, self.m_chart.size().height()
)
self.m_coordX.setText("X: ")
self.m_coordY = QGraphicsSimpleTextItem(self.m_chart)
self.m_coordY.setPos(
self.m_chart.size().width() / 2 + 50, self.m_chart.size().height()
)
self.m_coordY.setText("Y: ")
series.clicked.connect(self.keepCallout)
series.hovered.connect(self.tooltip)
series2.clicked.connect(self.keepCallout)
series2.hovered.connect(self.tooltip)
self.setMouseTracking(True)
def resizeEvent(self, event):
if self.scene() is not None:
self.scene().setSceneRect(QRectF(QRect(QPoint(0, 0), event.size())))
self.m_chart.resize(QSizeF(event.size()))
self.m_coordX.setPos(
self.m_chart.size().width() / 2 - 50, self.m_chart.size().height() - 20
)
self.m_coordY.setPos(
self.m_chart.size().width() / 2 + 50, self.m_chart.size().height() - 20
)
for callout in self.m_callouts:
callout.updateGeometry()
super().resizeEvent(event)
def mouseMoveEvent(self, event):
self.m_coordX.setText("X: %f" % self.m_chart.mapToValue(event.pos()).x())
self.m_coordY.setText("Y: %f" % self.m_chart.mapToValue(event.pos()).y())
super().mouseMoveEvent(event)
def keepCallout(self):
self.m_callouts.append(self.m_tooltip)
self.m_tooltip = Callout(self.m_chart)
def tooltip(self, point, state):
if self.m_tooltip is None:
self.m_tooltip = Callout(self.m_chart)
if state:
self.m_tooltip.setText("X: %f \nY: %f " % (point.x(), point.y()))
self.m_tooltip.setAnchor(point)
self.m_tooltip.setZValue(11)
self.m_tooltip.updateGeometry()
self.m_tooltip.show()
else:
self.m_tooltip.hide()
class GraphicsScene(QGraphicsScene):
def __init__(self):
super(GraphicsScene, self).__init__()
self.line_series = QLineSeries()
self.chart = QChart()
self.chart_view = QChartView(self.chart)
self.chart_view.setMinimumSize(640, 480)
self.model = ItemModel()
self.model.signal_update_models.connect(self.update_axes)
self.table_view = TableView()
self.table_view.setModel(self.model)
self.table_view.horizontalHeader().setSectionResizeMode(
QHeaderView.Stretch)
self.table_view.verticalHeader().setSectionResizeMode(
QHeaderView.Stretch)
self.chart.setAnimationOptions(QChart.AllAnimations)
self.chart.setAnimationDuration(2000)
self.line_series.setName("Line 1")
self.mapper = QVXYModelMapper(self)
self.mapper.setXColumn(0)
self.mapper.setYColumn(1)
self.mapper.setSeries(self.line_series)
self.mapper.setModel(self.model)
self.chart.addSeries(self.line_series)
seriesColorHex = self.line_series.pen().color().name()
self.model.add_mapping(seriesColorHex,
QRect(0, 0, 2, self.model.rowCount()))
self.line_series2 = QLineSeries()
self.line_series2.setName("Line 2")
self.mapper2 = QVXYModelMapper(self)
self.mapper2.setXColumn(2)
self.mapper2.setYColumn(3)
self.mapper2.setSeries(self.line_series2)
self.mapper2.setModel(self.model)
self.chart.addSeries(self.line_series2)
seriesColorHex = self.line_series2.pen().color().name()
self.model.add_mapping(seriesColorHex,
QRect(2, 0, 2, self.model.rowCount()))
self.chart.createDefaultAxes()
self.chart_view.setRenderHint(QPainter.Antialiasing)
self.chart.resize(500, 400)
self.chart.setFlag(QGraphicsItem.ItemIsMovable)
self.chart.setFlag(QGraphicsItem.ItemIsSelectable)
self.addItem(self.chart)
@pyqtSlot()
def update_axes(self):
self.chart.removeSeries(self.line_series)
self.chart.removeSeries(self.line_series2)
self.chart.addSeries(self.line_series)
self.chart.addSeries(self.line_series2)
self.chart.createDefaultAxes()
