class ChartTab(QChartView):
def __init__(self):
QChartView.__init__(self)
self.chart = QChart()
self.candleSeries = QCandlestickSeries(self)
self.candleSeries.setIncreasingColor(Qt.blue)
self.candleSeries.setBodyOutlineVisible(False)
self.candleSeries.setDecreasingColor(Qt.red)
self.candleSeries.setMaximumColumnWidth(20)
self.candleSeries.clicked.connect(lambda set: print(set.high()))
self.xAxis = QDateTimeAxis()
self.xAxis.setTickCount(10)
self.xAxis.setFormat("h:mm")
self.yAxis = QValueAxis()
for candle in data:
self.addCandle(
self.get_integer_price(candle[0]),
self.get_integer_price(candle[1]),
self.get_integer_price(candle[2]),
self.get_integer_price(candle[3]),
datetime.strptime(candle[4], '%Y%m%d%H%M%S').timestamp() *
1000)
self.chart.addSeries(self.candleSeries)
self.setChart(self.chart)
self.chart.setAxisX(self.xAxis, self.candleSeries)
self.chart.setAxisY(self.yAxis, self.candleSeries)
self.chart.legend().setVisible(False)
def mouseMoveEvent(self, QMouseEvent):
chartValues = self.chart.mapToValue(QMouseEvent.pos())
price = chartValues.y()
print(price)
def addCandle(self, open, close, high, low, timestamp):
candlestickSet = QCandlestickSet()
candlestickSet.setOpen(open)
candlestickSet.setClose(close)
candlestickSet.setHigh(high)
candlestickSet.setLow(low)
candlestickSet.setTimestamp(timestamp)
pen = QPen()
candlestickSet.setPen(pen)
self.candleSeries.append(candlestickSet)
def get_integer_price(self, str_price):
return int(str_price.strip()[1:])
class barChartView(QChartView):
def __init__(self, xAxis=[], *args, **kwargs):
super(barChartView, self).__init__(*args, **kwargs)
self.initChart(xAxis)
# line 宽度需要调整
self.lineItem = QGraphicsLineItem(self._chart)
pen = QPen(Qt.gray)
self.lineItem.setPen(pen)
self.lineItem.setZValue(998)
self.lineItem.hide()
self.cal()
# 一些固定计算，减少mouseMoveEvent中的计算量
def cal(self):
# 提示widget
self.toolTipWidget = GraphicsProxyWidget(self._chart)
# 获取x和y轴的最小最大值
axisX, axisY = self._chart.axisX(), self._chart.axisY()
self.category_len = len(axisX.categories())
self.min_x, self.max_x = -0.5, self.category_len - 0.5
self.min_y, self.max_y = axisY.min(), axisY.max()
# 坐标系中左上角顶点
self.point_top = self._chart.mapToPosition(
QPointF(self.min_x, self.max_y))
def setCat(self, data):
self.categories = data
#初始化
def initChart(self, xAxis):
self._chart = QChart()
# 调整边距
self._chart.layout().setContentsMargins(0, 0, 0, 0) # 外界
self._chart.setMargins(QMargins(3, 0, 3, 0)) # 内界
self._chart.setBackgroundRoundness(0)
self._chart.setBackgroundVisible(False)
# 设置主题
self._chart.setTheme(QChart.ChartThemeBlueIcy)
# 抗锯齿
self.setRenderHint(QPainter.Antialiasing)
# 开启动画效果
self._chart.setAnimationOptions(QChart.SeriesAnimations)
self.categories = xAxis
self._series = QBarSeries(self._chart)
self._chart.addSeries(self._series)
self._chart.createDefaultAxes() # 创建默认的轴
self._axis_x = QBarCategoryAxis(self._chart)
self._axis_x.append(self.categories)
self._axis_y = QValueAxis(self._chart)
self._axis_y.setTitleText("任务数")
self._axis_y.setRange(0, 10)
self._chart.setAxisX(self._axis_x, self._series)
self._chart.setAxisY(self._axis_y, self._series)
# chart的图例
legend = self._chart.legend()
legend.setVisible(True)
self.setChart(self._chart)
def mouseMoveEvent(self, event):
super(barChartView, self).mouseMoveEvent(event)
pos = event.pos()
# 把鼠标位置所在点转换为对应的xy值
x = self._chart.mapToValue(pos).x()
y = self._chart.mapToValue(pos).y()
index = round(x)
# 得到在坐标系中的所有bar的类型和点
serie = self._chart.series()[0]
bars = [
(bar, bar.at(index)) for bar in serie.barSets()
if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y
]
# print(bars)
if bars:
right_top = self._chart.mapToPosition(
QPointF(self.max_x, self.max_y))
# 等分距离比例
step_x = round(
(right_top.x() - self.point_top.x()) / self.category_len)
posx = self._chart.mapToPosition(QPointF(x, self.min_y))
self.lineItem.setLine(posx.x(), self.point_top.y(), posx.x(),
posx.y())
self.lineItem.show()
try:
title = self.categories[index]
except:
title = ""
t_width = self.toolTipWidget.width()
t_height = self.toolTipWidget.height()
# 如果鼠标位置离右侧的距离小于tip宽度
x = pos.x() - t_width if self.width() - \
pos.x() - 20 < t_width else pos.x()
# 如果鼠标位置离底部的高度小于tip高度
y = pos.y() - t_height if self.height() - \
pos.y() - 20 < t_height else pos.y()
self.toolTipWidget.show(title, bars, QPoint(x, y))
else:
self.toolTipWidget.hide()
self.lineItem.hide()
class IMUChartView(QChartView, BaseGraph):
def __init__(self, parent=None):
super().__init__(parent=parent)
# Render on OpenGL
self.setViewport(QOpenGLWidget())
self.xvalues = {}
self.chart = QChart()
self.setChart(self.chart)
self.chart.legend().setVisible(True)
self.chart.legend().setAlignment(Qt.AlignTop)
self.ncurves = 0
self.setRenderHint(QPainter.Antialiasing)
# Cursor (with chart as parent)
self.cursor = QGraphicsLineItem(self.chart)
self.cursor.setZValue(100.0)
# self.scene().addItem(self.cursor)
# Selection features
# self.setRubberBand(QChartView.HorizontalRubberBand)
self.selectionBand = QRubberBand(QRubberBand.Rectangle, self)
self.selecting = False
self.initialClick = QPoint()
# Track mouse
self.setMouseTracking(True)
self.labelValue = QLabel(self)
self.labelValue.setStyleSheet(
"background-color: rgba(255,255,255,75%); color: black;")
self.labelValue.setAlignment(Qt.AlignCenter)
self.labelValue.setMargin(5)
self.labelValue.setVisible(False)
self.build_style()
self.selection_start_time = None
self.selection_stop_time = None
self.cursor_time = None
def build_style(self):
self.setStyleSheet("QLabel{color:blue;}")
self.chart.setTheme(QChart.ChartThemeBlueCerulean)
self.setBackgroundBrush(QBrush(Qt.darkGray))
self.chart.setPlotAreaBackgroundBrush(QBrush(Qt.black))
self.chart.setPlotAreaBackgroundVisible(True)
def save_as_png(self, file_path):
pixmap = self.grab()
child = self.findChild(QOpenGLWidget)
painter = QPainter(pixmap)
if child is not None:
d = child.mapToGlobal(QPoint()) - self.mapToGlobal(QPoint())
painter.setCompositionMode(QPainter.CompositionMode_SourceAtop)
painter.drawImage(d, child.grabFramebuffer())
painter.end()
pixmap.save(file_path, 'PNG')
# def closeEvent(self, event):
# self.aboutToClose.emit(self)
@staticmethod
def decimate(xdata, ydata):
# assert(len(xdata) == len(ydata))
# Decimate only if we have too much data
decimate_factor = len(xdata) / 100000.0
# decimate_factor = 1.0
if decimate_factor > 1.0:
decimate_factor = int(np.floor(decimate_factor))
# print('decimate factor', decimate_factor)
x = np.ndarray(int(len(xdata) / decimate_factor), dtype=np.float64)
y = np.ndarray(int(len(ydata) / decimate_factor), dtype=np.float64)
# for i in range(len(x)):
for i, _ in enumerate(x):
index = i * decimate_factor
# assert(index < len(xdata))
x[i] = xdata[index]
y[i] = ydata[index]
if x[i] < x[0]:
print('timestamp error', x[i], x[0])
return x, y
else:
return xdata, ydata
@pyqtSlot(float, float)
def axis_range_changed(self, min_value, max_value):
# print('axis_range_changed', min, max)
for axis in self.chart.axes():
axis.applyNiceNumbers()
def update_axes(self):
# Get and remove all axes
for axis in self.chart.axes():
self.chart.removeAxis(axis)
# Create new axes
# Create axis X
axisx = QDateTimeAxis()
axisx.setTickCount(5)
axisx.setFormat("dd MMM yyyy hh:mm:ss")
axisx.setTitleText("Date")
self.chart.addAxis(axisx, Qt.AlignBottom)
# Create axis Y
axisY = QValueAxis()
axisY.setTickCount(5)
axisY.setLabelFormat("%.3f")
axisY.setTitleText("Values")
self.chart.addAxis(axisY, Qt.AlignLeft)
# axisY.rangeChanged.connect(self.axis_range_changed)
ymin = None
ymax = None
# Attach axes to series, find min-max
for series in self.chart.series():
series.attachAxis(axisx)
series.attachAxis(axisY)
vect = series.pointsVector()
# for i in range(len(vect)):
for i, _ in enumerate(vect):
if ymin is None:
ymin = vect[i].y()
ymax = vect[i].y()
else:
ymin = min(ymin, vect[i].y())
ymax = max(ymax, vect[i].y())
# Update range
# print('min max', ymin, ymax)
if ymin is not None:
axisY.setRange(ymin, ymax)
# Make the X,Y axis more readable
# axisx.applyNiceNumbers()
# axisY.applyNiceNumbers()
def add_data(self, xdata, ydata, color=None, legend_text=None):
curve = QLineSeries()
pen = curve.pen()
if color is not None:
pen.setColor(color)
pen.setWidthF(1.5)
curve.setPen(pen)
# curve.setPointsVisible(True)
# curve.setUseOpenGL(True)
self.total_samples = max(self.total_samples, len(xdata))
# Decimate
xdecimated, ydecimated = self.decimate(xdata, ydata)
# Data must be in ms since epoch
# curve.append(self.series_to_polyline(xdecimated * 1000.0, ydecimated))
# self.reftime = datetime.datetime.fromtimestamp(xdecimated[0])
# if len(xdecimated) > 0:
# xdecimated = xdecimated - xdecimated[0]
xdecimated *= 1000 # No decimal expected
points = []
for i, _ in enumerate(xdecimated):
# TODO hack
# curve.append(QPointF(xdecimated[i], ydecimated[i]))
points.append(QPointF(xdecimated[i], ydecimated[i]))
curve.replace(points)
points.clear()
if legend_text is not None:
curve.setName(legend_text)
# Needed for mouse events on series
self.chart.setAcceptHoverEvents(True)
self.xvalues[self.ncurves] = np.array(xdecimated)
# connect signals / slots
# curve.clicked.connect(self.lineseries_clicked)
# curve.hovered.connect(self.lineseries_hovered)
# Add series
self.chart.addSeries(curve)
self.ncurves += 1
self.update_axes()
def update_data(self, xdata, ydata, series_id):
if series_id < len(self.chart.series()):
# Find start time to replace data
current_series = self.chart.series()[series_id]
current_points = current_series.pointsVector()
# Find start and end indexes
start_index = -1
try:
start_index = current_points.index(
QPointF(xdata[0] * 1000, ydata[0])) # Right on the value!
# print("update_data: start_index found exact match.")
except ValueError:
# print("update_data: start_index no exact match - scanning deeper...")
for i, value in enumerate(current_points):
# print(str(current_points[i].x()) + " == " + str(xdata[0]*1000))
if current_points[i].x() == xdata[0] * 1000 or (
i > 0 and current_points[i - 1].x() <
xdata[0] * 1000 < current_points[i].x()):
start_index = i
# print("update_data: start_index found approximative match.")
break
end_index = -1
try:
end_index = current_points.index(
QPointF(xdata[len(xdata) - 1] * 1000,
ydata[len(ydata) - 1])) # Right on!
# print("update_data: start_index found exact match.")
except ValueError:
# print("update_data: start_index no exact match - scanning deeper...")
for i, value in enumerate(current_points):
# print(str(current_points[i].x()) + " == " + str(xdata[0]*1000))
if current_points[i].x(
) == xdata[len(xdata) - 1] * 1000 or (
i > 0 and
current_points[i - 1].x() < xdata[len(xdata) - 1] *
1000 < current_points[i].x()):
end_index = i
# print("update_data: start_index found approximative match.")
break
if start_index < 0 or end_index < 0:
return
# Decimate, if needed
xdata, ydata = self.decimate(xdata, ydata)
# Check if we have the same number of points for that range. If not, remove and replace!
target_points = current_points[start_index:end_index]
if len(target_points) != len(xdata):
points = []
for i, value in enumerate(xdata):
# TODO improve
points.append(QPointF(value * 1000, ydata[i]))
new_points = current_points[0:start_index] + points[0:len(points)-1] + \
current_points[end_index:len(current_points)-1]
current_series.replace(new_points)
new_points.clear()
# self.xvalues[series_id] = np.array(xdata)
return
@classmethod
def set_title(cls, title):
# print('Setting title: ', title)
# self.chart.setTitle(title)
return
@staticmethod
def series_to_polyline(xdata, ydata):
"""Convert series data to QPolygon(F) polyline
This code is derived from PythonQwt's function named
`qwt.plot_curve.series_to_polyline`"""
# print('series_to_polyline types:', type(xdata[0]), type(ydata[0]))
size = len(xdata)
polyline = QPolygonF(size)
# for i in range(0, len(xdata)):
# polyline[i] = QPointF(xdata[i] - xdata[0], ydata[i])
for i, data in enumerate(xdata):
polyline[i] = QPointF(data - xdata[0], ydata[i])
# pointer = polyline.data()
# dtype, tinfo = np.float, np.finfo # integers: = np.int, np.iinfo
# pointer.setsize(2*polyline.size()*tinfo(dtype).dtype.itemsize)
# memory = np.frombuffer(pointer, dtype)
# memory[:(size-1)*2+1:2] = xdata
# memory[1:(size-1)*2+2:2] = ydata
return polyline
def add_test_data(self):
# 100Hz, one day accelerometer values
npoints = 1000 * 60 * 24
xdata = np.linspace(0., 10., npoints)
self.add_data(xdata, np.sin(xdata), color=Qt.red, legend_text='Acc. X')
# self.add_data(xdata, np.cos(xdata), color=Qt.green, legend_text='Acc. Y')
# self.add_data(xdata, np.cos(2 * xdata), color=Qt.blue, legend_text='Acc. Z')
self.set_title(
"Simple example with %d curves of %d points (OpenGL Accelerated Series)"
% (self.ncurves, npoints))
def mouseMoveEvent(self, e: QMouseEvent):
if self.selecting:
clicked_x = max(
self.chart.plotArea().x(),
min(
self.mapToScene(e.pos()).x(),
self.chart.plotArea().x() + self.chart.plotArea().width()))
clicked_y = max(
self.chart.plotArea().y(),
min(
self.mapToScene(e.pos()).y(),
self.chart.plotArea().y() +
self.chart.plotArea().height()))
current_pos = QPoint(clicked_x, clicked_y) # e.pos()
self.selection_stop_time = self.chart.mapToValue(
QPointF(clicked_x, 0)).x()
self.setCursorPosition(clicked_x, True)
if self.interaction_mode == GraphInteractionMode.SELECT:
if current_pos.x() < self.initialClick.x():
start_x = current_pos.x()
width = self.initialClick.x() - start_x
else:
start_x = self.initialClick.x()
width = current_pos.x() - self.initialClick.x()
self.selectionBand.setGeometry(
QRect(start_x,
self.chart.plotArea().y(), width,
self.chart.plotArea().height()))
if self.selection_rec:
self.selection_rec.setRect(
QRectF(start_x,
self.chart.plotArea().y(), width,
self.chart.plotArea().height()))
if self.interaction_mode == GraphInteractionMode.MOVE:
new_pos = current_pos - self.initialClick
self.chart.scroll(-new_pos.x(), new_pos.y())
self.initialClick = current_pos
def mousePressEvent(self, e: QMouseEvent):
# Handling rubberbands
# super().mousePressEvent(e)
# Verify if click is inside plot area
# if self.chart.plotArea().contains(e.pos()):
self.selecting = True
clicked_x = max(
self.chart.plotArea().x(),
min(
self.mapToScene(e.pos()).x(),
self.chart.plotArea().x() + self.chart.plotArea().width()))
clicked_y = max(
self.chart.plotArea().y(),
min(
self.mapToScene(e.pos()).y(),
self.chart.plotArea().y() + self.chart.plotArea().height()))
self.initialClick = QPoint(clicked_x, clicked_y) # e.pos()
self.selection_start_time = self.chart.mapToValue(QPointF(
clicked_x, 0)).x()
self.setCursorPosition(clicked_x, True)
if self.interaction_mode == GraphInteractionMode.SELECT:
self.selectionBand.setGeometry(
QRect(self.initialClick.x(),
self.chart.plotArea().y(), 1,
self.chart.plotArea().height()))
self.selectionBand.show()
if self.interaction_mode == GraphInteractionMode.MOVE:
QGuiApplication.setOverrideCursor(Qt.ClosedHandCursor)
self.labelValue.setVisible(False)
def mouseReleaseEvent(self, e: QMouseEvent):
# Assure if click is inside plot area
# Handling rubberbands (with min / max x)
clicked_x = max(
self.chart.plotArea().x(),
min(
self.mapToScene(e.pos()).x(),
self.chart.plotArea().x() + self.chart.plotArea().width()))
if self.interaction_mode == GraphInteractionMode.SELECT:
self.selectionBand.hide()
if clicked_x != self.mapToScene(self.initialClick).x():
mapped_x = self.mapToScene(self.initialClick).x()
if self.initialClick.x() < clicked_x:
self.setSelectionArea(mapped_x, clicked_x, True)
else:
self.setSelectionArea(clicked_x, mapped_x, True)
if self.interaction_mode == GraphInteractionMode.MOVE:
QGuiApplication.restoreOverrideCursor()
self.selecting = False
def clearSelectionArea(self, emit_signal=False):
if self.selection_rec:
self.scene().removeItem(self.selection_rec)
self.selection_rec = None
if emit_signal:
self.clearedSelectionArea.emit()
def setSelectionArea(self, start_pos, end_pos, emit_signal=False):
selection_brush = QBrush(QColor(153, 204, 255, 128))
selection_pen = QPen(Qt.transparent)
if self.selection_rec:
self.scene().removeItem(self.selection_rec)
self.selection_rec = self.scene().addRect(
start_pos,
self.chart.plotArea().y(), end_pos - start_pos,
self.chart.plotArea().height(), selection_pen, selection_brush)
if emit_signal:
self.selectedAreaChanged.emit(
self.chart.mapToValue(QPointF(start_pos, 0)).x(),
self.chart.mapToValue(QPointF(end_pos, 0)).x())
def setSelectionAreaFromTime(self,
start_time,
end_time,
emit_signal=False):
# Convert times to x values
if isinstance(start_time, datetime.datetime):
start_time = start_time.timestamp() * 1000
if isinstance(end_time, datetime.datetime):
end_time = end_time.timestamp() * 1000
start_pos = self.chart.mapToPosition(QPointF(start_time, 0)).x()
end_pos = self.chart.mapToPosition(QPointF(end_time, 0)).x()
self.setSelectionArea(start_pos, end_pos)
def setCursorPosition(self, pos, emit_signal=False):
self.cursor_time = self.chart.mapToValue(QPointF(pos, 0)).x()
# print (pos)
pen = self.cursor.pen()
pen.setColor(Qt.cyan)
pen.setWidthF(1.0)
self.cursor.setPen(pen)
# On Top
self.cursor.setZValue(100.0)
area = self.chart.plotArea()
x = pos
y1 = area.y()
y2 = area.y() + area.height()
# self.cursor.set
self.cursor.setLine(x, y1, x, y2)
self.cursor.show()
xmap_initial = self.chart.mapToValue(QPointF(pos, 0)).x()
display = ''
# '<i>' + (datetime.datetime.fromtimestamp(xmap + self.reftime.timestamp())).strftime('%d-%m-%Y %H:%M:%S') +
# '</i><br />'
ypos = 10
last_val = None
for i in range(self.ncurves):
# Find nearest point
idx = (np.abs(self.xvalues[i] - xmap_initial)).argmin()
ymap = self.chart.series()[i].at(idx).y()
xmap = self.chart.series()[i].at(idx).x()
if i == 0:
display += "<i>" + (datetime.datetime.fromtimestamp(xmap_initial/1000)).strftime('%d-%m-%Y %H:%M:%S:%f') + \
"</i>"
# Compute where to display label
if last_val is None or ymap > last_val:
last_val = ymap
ypos = self.chart.mapToPosition(QPointF(xmap, ymap)).y()
if display != '':
display += '<br />'
display += self.chart.series()[i].name(
) + ': <b>' + '%.3f' % ymap + '</b>'
self.labelValue.setText(display)
self.labelValue.setGeometry(pos, ypos, 100, 100)
self.labelValue.adjustSize()
self.labelValue.setVisible(True)
if emit_signal:
self.cursorMoved.emit(xmap_initial)
self.update()
def setCursorPositionFromTime(self, timestamp, emit_signal=False):
# Find nearest point
if isinstance(timestamp, datetime.datetime):
timestamp = timestamp.timestamp()
pos = self.get_pos_from_time(timestamp)
self.setCursorPosition(pos, emit_signal)
def get_pos_from_time(self, timestamp):
px = timestamp
idx1 = (np.abs(self.xvalues[0] - px)).argmin()
x1 = self.chart.series()[0].at(idx1).x()
pos1 = self.chart.mapToPosition(QPointF(x1, 0)).x()
idx2 = idx1 + 1
if idx2 < len(self.chart.series()[0]):
x2 = self.chart.series()[0].at(idx2).x()
if x2 != x1:
pos2 = self.chart.mapToPosition(QPointF(x2, 0)).x()
x2 /= 1000
x1 /= 1000
pos = (((px - x1) / (x2 - x1)) * (pos2 - pos1)) + pos1
else:
pos = pos1
else:
pos = pos1
return pos
def resizeEvent(self, e: QResizeEvent):
super().resizeEvent(e)
# oldSize = e.oldSize()
# newSize = e.size()
# Update cursor from time
if self.cursor_time:
self.setCursorPositionFromTime(self.cursor_time / 1000.0)
# Update selection
if self.selection_rec:
self.setSelectionAreaFromTime(self.selection_start_time,
self.selection_stop_time)
def zoom_in(self):
self.chart.zoomIn()
self.update_axes()
def zoom_out(self):
self.chart.zoomOut()
self.update_axes()
def zoom_area(self):
if self.selection_rec:
zoom_rec = self.selection_rec.rect()
zoom_rec.setY(0)
zoom_rec.setHeight(self.chart.plotArea().height())
self.chart.zoomIn(zoom_rec)
self.clearSelectionArea(True)
self.update_axes()
def zoom_reset(self):
self.chart.zoomReset()
self.update_axes()
def get_displayed_start_time(self):
min_x = self.chart.mapToScene(self.chart.plotArea()).boundingRect().x()
xmap = self.chart.mapToValue(QPointF(min_x, 0)).x()
return datetime.datetime.fromtimestamp(xmap / 1000)
def get_displayed_end_time(self):
max_x = self.chart.mapToScene(self.chart.plotArea()).boundingRect().x()
max_x += self.chart.mapToScene(
self.chart.plotArea()).boundingRect().width()
xmap = self.chart.mapToValue(QPointF(max_x, 0)).x()
return datetime.datetime.fromtimestamp(xmap / 1000)
@property
def is_zoomed(self):
return self.chart.isZoomed()
class IMUChartView(QChartView):
aboutToClose = pyqtSignal(QObject)
cursorMoved = pyqtSignal(datetime.datetime)
def __init__(self, parent=None):
super(QChartView, self).__init__(parent=parent)
#self.setFixedHeight(400)
#self.setMinimumHeight(500)
"""self.setMaximumHeight(700)
self.setFixedHeight(700)
self.setMinimumWidth(1500)
self.setSizePolicy(QSizePolicy.Fixed,QSizePolicy.Fixed)"""
self.reftime = datetime.datetime.now()
self.cursor = QGraphicsLineItem()
self.scene().addItem(self.cursor)
self.decim_factor = 1
# self.setScene(QGraphicsScene())
self.chart = QChart()
# self.scene().addItem(self.chart)
self.setChart(self.chart)
self.chart.legend().setVisible(True)
self.chart.legend().setAlignment(Qt.AlignTop)
self.ncurves = 0
self.setRenderHint(QPainter.Antialiasing)
self.setRubberBand(QChartView.HorizontalRubberBand)
# X, Y label on bottom
# self.xTextItem = QGraphicsSimpleTextItem(self.chart)
# self.xTextItem.setText('X: ')
# self.yTextItem = QGraphicsSimpleTextItem(self.chart)
# self.yTextItem.setText('Y: ')
# self.update_x_y_coords()
# Track mouse
self.setMouseTracking(True)
# Top Widgets
newWidget = QWidget(self)
newLayout = QHBoxLayout()
newLayout.setContentsMargins(0, 0, 0, 0)
newWidget.setLayout(newLayout)
#labelx = QLabel(self)
#labelx.setText('X:')
#self.labelXValue = QLabel(self)
#labely = QLabel(self)
#labely.setText('Y:')
#self.labelYValue = QLabel(self)
# Test buttons
#newLayout.addWidget(QToolButton(self))
#newLayout.addWidget(QToolButton(self))
#newLayout.addWidget(QToolButton(self))
# Spacer
#newLayout.addItem(QSpacerItem(10, 10, QSizePolicy.Expanding, QSizePolicy.Minimum))
# Labels
"""newLayout.addWidget(labelx)
newLayout.addWidget(self.labelXValue)
self.labelXValue.setMinimumWidth(200)
self.labelXValue.setMaximumWidth(200)
newLayout.addWidget(labely)
newLayout.addWidget(self.labelYValue)
self.labelYValue.setMinimumWidth(200)
self.labelYValue.setMaximumWidth(200)
"""
"""if parent is not None:
parent.layout().setMenuBar(newWidget)
"""
# self.layout()
self.build_style()
def build_style(self):
self.setStyleSheet("QLabel{color:blue;}")
self.setBackgroundBrush(QBrush(Qt.darkGray))
self.chart.setPlotAreaBackgroundBrush(QBrush(Qt.black))
self.chart.setPlotAreaBackgroundVisible(True)
def save_as_png(self, file_path):
pixmap = self.grab()
child = self.findChild(QOpenGLWidget)
painter = QPainter(pixmap)
if child is not None:
d = child.mapToGlobal(QPoint()) - self.mapToGlobal(QPoint())
painter.setCompositionMode(QPainter.CompositionMode_SourceAtop)
painter.drawImage(d, child.grabFramebuffer())
painter.end()
pixmap.save(file_path, 'PNG')
def closeEvent(self, QCloseEvent):
self.aboutToClose.emit(self)
@pyqtSlot(QPointF)
def lineseries_clicked(self, point):
print('lineseries clicked', point)
@pyqtSlot(QPointF)
def lineseries_hovered(self, point):
print('lineseries hovered', point)
def update_x_y_coords(self):
pass
# self.xTextItem.setPos(self.chart.size().width() / 2 - 100, self.chart.size().height() - 40)
# self.yTextItem.setPos(self.chart.size().width() / 2 + 100, self.chart.size().height() - 40)
def decimate(self, xdata, ydata):
assert (len(xdata) == len(ydata))
# Decimate only if we have too much data
decimate_factor = len(xdata) / 100000.0
if decimate_factor > 1.0:
decimate_factor = int(np.floor(decimate_factor))
#print('decimate factor', decimate_factor)
# x = decimate(xdata, decimate_factor)
# y = decimate(ydata, decimate_factor)
self.decim_factor = decimate_factor
x = np.ndarray(int(len(xdata) / decimate_factor), dtype=np.float64)
y = np.ndarray(int(len(ydata) / decimate_factor), dtype=np.float64)
for i in range(len(x)):
index = i * decimate_factor
assert (index < len(xdata))
x[i] = xdata[index]
y[i] = ydata[index]
if x[i] < x[0]:
print('timestamp error', x[i], x[0])
#print('return size', len(x), len(y), 'timestamp', x[0])
return x, y
else:
return xdata, ydata
@pyqtSlot(float, float)
def axis_range_changed(self, min, max):
#print('axis_range_changed', min, max)
for axis in self.chart.axes():
axis.applyNiceNumbers()
def update_axes(self):
# Get and remove all axes
for axis in self.chart.axes():
self.chart.removeAxis(axis)
# Create new axes
# Create axis X
# axisX = QDateTimeAxis()
# axisX.setTickCount(5)
# axisX.setFormat("dd MMM yyyy")
# axisX.setTitleText("Date")
# self.chart.addAxis(axisX, Qt.AlignBottom)
# axisX.rangeChanged.connect(self.axis_range_changed)
axisX = QValueAxis()
axisX.setTickCount(10)
axisX.setLabelFormat("%li")
axisX.setTitleText("Seconds")
self.chart.addAxis(axisX, Qt.AlignBottom)
# axisX.rangeChanged.connect(self.axis_range_changed)
# Create axis Y
axisY = QValueAxis()
axisY.setTickCount(5)
axisY.setLabelFormat("%.3f")
axisY.setTitleText("Values")
self.chart.addAxis(axisY, Qt.AlignLeft)
# axisY.rangeChanged.connect(self.axis_range_changed)
ymin = None
ymax = None
# Attach axes to series, find min-max
for series in self.chart.series():
series.attachAxis(axisX)
series.attachAxis(axisY)
vect = series.pointsVector()
for i in range(len(vect)):
if ymin is None:
ymin = vect[i].y()
ymax = vect[i].y()
else:
ymin = min(ymin, vect[i].y())
ymax = max(ymax, vect[i].y())
# Update range
# print('min max', ymin, ymax)
if ymin is not None:
axisY.setRange(ymin, ymax)
# Make the X,Y axis more readable
axisX.applyNiceNumbers()
# axisY.applyNiceNumbers()
def add_data(self, xdata, ydata, color=None, legend_text=None):
curve = QLineSeries()
pen = curve.pen()
if color is not None:
pen.setColor(color)
pen.setWidthF(1.5)
curve.setPen(pen)
#curve.setUseOpenGL(True)
# Decimate
xdecimated, ydecimated = self.decimate(xdata, ydata)
# Data must be in ms since epoch
# curve.append(self.series_to_polyline(xdecimated * 1000.0, ydecimated))
for i in range(len(xdecimated)):
# TODO hack
x = xdecimated[i] - xdecimated[0]
curve.append(QPointF(x, ydecimated[i]))
self.reftime = datetime.datetime.fromtimestamp(xdecimated[0])
if legend_text is not None:
curve.setName(legend_text)
# Needed for mouse events on series
self.chart.setAcceptHoverEvents(True)
# connect signals / slots
# curve.clicked.connect(self.lineseries_clicked)
# curve.hovered.connect(self.lineseries_hovered)
# Add series
self.chart.addSeries(curve)
self.ncurves += 1
self.update_axes()
def set_title(self, title):
# print('Setting title: ', title)
#self.chart.setTitle(title)
pass
def series_to_polyline(self, xdata, ydata):
"""Convert series data to QPolygon(F) polyline
This code is derived from PythonQwt's function named
`qwt.plot_curve.series_to_polyline`"""
# print('series_to_polyline types:', type(xdata[0]), type(ydata[0]))
size = len(xdata)
polyline = QPolygonF(size)
for i in range(0, len(xdata)):
polyline[i] = QPointF(xdata[i] - xdata[0], ydata[i])
# pointer = polyline.data()
# dtype, tinfo = np.float, np.finfo # integers: = np.int, np.iinfo
# pointer.setsize(2*polyline.size()*tinfo(dtype).dtype.itemsize)
# memory = np.frombuffer(pointer, dtype)
# memory[:(size-1)*2+1:2] = xdata
# memory[1:(size-1)*2+2:2] = ydata
return polyline
def add_test_data(self):
# 100Hz, one day accelerometer values
npoints = 1000 * 60 * 24
xdata = np.linspace(0., 10., npoints)
self.add_data(xdata, np.sin(xdata), color=Qt.red, legend_text='Acc. X')
# self.add_data(xdata, np.cos(xdata), color=Qt.green, legend_text='Acc. Y')
# self.add_data(xdata, np.cos(2 * xdata), color=Qt.blue, legend_text='Acc. Z')
self.set_title("Simple example with %d curves of %d points " \
"(OpenGL Accelerated Series)" \
% (self.ncurves, npoints))
def mouseMoveEvent(self, e: QMouseEvent):
# Handling rubberbands
super().mouseMoveEvent(e)
# Go back to seconds (instead of ms)
"""xmap = self.chart.mapToValue(e.pos()).x()
ymap = self.chart.mapToValue(e.pos()).y()
self.labelXValue.setText(str(datetime.datetime.fromtimestamp(xmap + self.reftime.timestamp())))
self.labelYValue.setText(str(ymap))"""
# self.xTextItem.setText('X: ' + str(datetime.datetime.fromtimestamp(xmap + self.reftime.timestamp())))
# self.yTextItem.setText('Y: ' + str(ymap))
def mousePressEvent(self, e: QMouseEvent):
# Handling rubberbands
super().mousePressEvent(e)
self.setCursorPosition(e.pos().x(), True)
pass
def setCursorPosition(self, pos, emit_signal=False):
# print (pos)
pen = self.cursor.pen()
pen.setColor(Qt.cyan)
pen.setWidthF(1.0)
self.cursor.setPen(pen)
# On Top
self.cursor.setZValue(100.0)
area = self.chart.plotArea()
x = pos
y1 = area.y()
y2 = area.y() + area.height()
# self.cursor.set
self.cursor.setLine(x, y1, x, y2)
self.cursor.show()
xmap = self.chart.mapToValue(QPointF(pos, 0)).x()
ymap = self.chart.mapToValue(QPointF(pos, 0)).y()
#self.labelXValue.setText(str(datetime.datetime.fromtimestamp(xmap + self.reftime.timestamp())))
#self.labelYValue.setText(str(ymap))
if emit_signal:
self.cursorMoved.emit(
datetime.datetime.fromtimestamp(xmap +
self.reftime.timestamp()))
self.update()
def setCursorPositionFromTime(self, timestamp, emit_signal=False):
# Converts timestamp to x value
pos = self.chart.mapToPosition(
QPointF((timestamp - self.reftime).total_seconds(), 0)).x()
self.setCursorPosition(pos, emit_signal)
def mouseReleaseEvent(self, e: QMouseEvent):
# Handling rubberbands
super().mouseReleaseEvent(e)
pass
def resizeEvent(self, e: QResizeEvent):
super().resizeEvent(e)
# Update cursor height
area = self.chart.plotArea()
line = self.cursor.line()
self.cursor.setLine(line.x1(), area.y(), line.x2(),
area.y() + area.height())
# self.scene().setSceneRect(0, 0, e.size().width(), e.size().height())
# Need to reposition X,Y labels
self.update_x_y_coords()
class ChartView(QChartView):
def __init__(self, file, parent=None):
super(ChartView, self).__init__(parent)
self._chart = QChart()
self._chart.setAcceptHoverEvents(True)
self.setChart(self._chart)
self.initUi(file)
def initUi(self, file):
if isinstance(file, dict):
return self.__analysis(file)
if isinstance(file, str):
if not os.path.isfile(file):
return self.__analysis(json.loads(file))
with open(file, "rb") as fp:
data = fp.read()
encoding = chardet.detect(data) or {}
data = data.decode(encoding.get("encoding") or "utf-8")
self.__analysis(json.loads(data))
# def onSeriesHoverd(self, point, state):
# print(point, state)
def mouseMoveEvent(self, event):
super(ChartView, self).mouseMoveEvent(event)
# 获取x和y轴的最小最大值
axisX, axisY = self._chart.axisX(), self._chart.axisY()
min_x, max_x = axisX.min(), axisX.max()
min_y, max_y = axisY.min(), axisY.max()
# 把鼠标位置所在点转换为对应的xy值
x = self._chart.mapToValue(event.pos()).x()
y = self._chart.mapToValue(event.pos()).y()
index = round(x) # 四舍五入
print(x, y, index)
# 得到在坐标系中的所有series的类型和点
points = [(s.type(), s.at(index)) for s in self._chart.series()
if min_x <= x <= max_x and min_y <= y <= max_y]
print(points)
def __getColor(self, color=None, default=Qt.white):
'''
:param color: int|str|[r,g,b]|[r,g,b,a]
'''
if not color:
return QColor(default)
if isinstance(color, QBrush):
return color
# 比如[r,g,b]或[r,g,b,a]
if isinstance(color, list) and 3 <= len(color) <= 4:
return QColor(*color)
else:
return QColor(color)
def __getPen(self,
pen=None,
default=QPen(Qt.white, 1, Qt.SolidLine, Qt.SquareCap,
Qt.BevelJoin)):
'''
:param pen: pen json
'''
if not pen or not isinstance(pen, dict):
return default
return QPen(self.__getColor(pen.get("color", None) or default.color()),
pen.get("width", 1) or 1,
pen.get("style", 0) or 0,
pen.get("capStyle", 16) or 16,
pen.get("joinStyle", 64) or 64)
def __getAlignment(self, alignment):
'''
:param alignment: left|top|right|bottom
'''
try:
return getattr(Qt, "Align" + alignment.capitalize())
except:
return Qt.AlignTop
# if alignment == "left":
# return Qt.AlignLeft
# if alignment == "right":
# return Qt.AlignRight
# if alignment == "bottom":
# return Qt.AlignBottom
# return Qt.AlignTop
def __setTitle(self, title=None):
'''
:param title: title json
'''
if not title or not isinstance(title, dict):
return
# 设置标题
self._chart.setTitle(title.get("text", "") or "")
# 设置标题颜色
self._chart.setTitleBrush(
self.__getColor(
title.get("color", self._chart.titleBrush())
or self._chart.titleBrush()))
# 设置标题字体
font = QFont(title.get("font", "") or self._chart.titleFont())
pointSize = title.get("pointSize", -1) or -1
if pointSize > 0:
font.setPointSize(pointSize)
font.setWeight(title.get("weight", -1) or -1)
font.setItalic(title.get("italic", False) or False)
self._chart.setTitleFont(font)
def __setAnimation(self, animation=None):
'''
:param value: animation json
'''
if not animation or not isinstance(animation, dict):
return
# 动画持续时间
self._chart.setAnimationDuration(
animation.get("duration", 1000) or 1000)
# 设置动画曲线
self._chart.setAnimationEasingCurve(
EasingCurve.get(animation.get("curve", 10) or 10, None)
or QEasingCurve.OutQuart)
# 设置开启何种动画
self._chart.setAnimationOptions(
AnimationOptions.get(animation.get("options", 0) or 0, None)
or QChart.NoAnimation)
def __setBackground(self, background=None):
'''
:param background:background json
'''
if not background or not isinstance(background, dict):
return
# 设置是否背景可用
self._chart.setBackgroundVisible(
background.get("visible", True) or True)
# 设置背景矩形的圆角
self._chart.setBackgroundRoundness(background.get("radius", 0) or 0)
# 设置下拉阴影
self._chart.setDropShadowEnabled(
background.get("dropShadow", True) or True)
# 设置pen
self._chart.setBackgroundPen(
self.__getPen(background.get("pen", None),
self._chart.backgroundPen()))
# 设置背景
image = background.get("image", None)
color = background.get("color", None)
if image:
self._chart.setBackgroundBrush(QBrush(QPixmap(image)))
elif color:
self._chart.setBackgroundBrush(
self.__getColor(color, self._chart.backgroundBrush()))
def __setMargins(self, margins=None):
'''
:param margins: margins json
'''
if not margins or not isinstance(margins, dict):
return
left = margins.get("left", 20) or 20
top = margins.get("top", 20) or 20
right = margins.get("right", 20) or 20
bottom = margins.get("bottom", 20) or 20
self._chart.setMargins(QMargins(left, top, right, bottom))
def __setLegend(self, legend=None):
'''
:param legend: legend json
'''
if not legend or not isinstance(legend, dict):
return
_legend = self._chart.legend()
_legend.setAlignment(self.__getAlignment(legend.get("alignment",
None)))
_legend.setShowToolTips(legend.get("showToolTips", True) or True)
def __getSerie(self, serie=None):
if not serie or not isinstance(serie, dict):
return None
types = serie.get("type", "") or ""
data = serie.get("data", []) or []
if not data or not isinstance(data, list):
return None
if types == "line":
_series = QLineSeries(self._chart)
else:
return None
# 设置series名字
_series.setName(serie.get("name", "") or "")
# 添加数据到series中
for index, value in enumerate(data):
# 保证vlaue必须是数字
_series.append(index, value if type(value) in (int, float) else 0)
return _series
def __setSeries(self, series=None):
if not series or not isinstance(series, list):
return
for serie in series:
_serie = self.__getSerie(serie)
if _serie:
# _serie.hovered.connect(self.onSeriesHoverd)
self._chart.addSeries(_serie)
# 创建默认的xy轴
self._chart.createDefaultAxes()
def __setAxisX(self, axisx=None):
if not axisx or not isinstance(axisx, dict):
return
series = self._chart.series()
if not series:
return
types = axisx.get("type", None)
data = axisx.get("data", []) or []
if not data or not isinstance(data, list):
return None
minx = self._chart.axisX().min()
maxx = self._chart.axisX().max()
if types == "category":
xaxis = QCategoryAxis(
self._chart,
labelsPosition=QCategoryAxis.AxisLabelsPositionOnValue)
# 隐藏网格
xaxis.setGridLineVisible(False)
# 刻度条数
tickc_d = len(data)
tickc = tickc_d if tickc_d > 1 else self._chart.axisX().tickCount()
xaxis.setTickCount(tickc)
# 强制x轴刻度与新刻度条数一致
self._chart.axisX().setTickCount(tickc)
step = (maxx - minx) / (tickc - 1)
for i in range(min(tickc_d, tickc)):
xaxis.append(data[i], minx + i * step)
self._chart.setAxisX(xaxis, series[-1])
def __analysis(self, datas):
'''
analysis json data
:param datas: json data
'''
# 标题
self.__setTitle(datas.get("title", None))
# 抗锯齿
if (datas.get("antialiasing", False) or False):
self.setRenderHint(QPainter.Antialiasing)
# 主题
self._chart.setTheme(datas.get("theme", 0) or 0)
# 动画
self.__setAnimation(datas.get("animation", None))
# 背景设置
self.__setBackground(datas.get("background", None))
# 边距设置
self.__setMargins(datas.get("margins", None))
# 设置图例
self.__setLegend(datas.get("legend", None))
# 设置series
self.__setSeries(datas.get("series", None))
# 自定义的x轴
self.__setAxisX(datas.get("axisx", None))
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 QmyMainWindow(QMainWindow):
def __init__(self, parent=None):
super().__init__(parent) #调用父类构造函数，创建窗体
self.ui = Ui_MainWindow() #创建UI对象
self.ui.setupUi(self) #构造UI界面
self.setWindowTitle("Demo12_6, 蜡烛图、日期时间坐标轴")
self.__buildStatusBar()
self.ui.chartView.setRenderHint(QPainter.Antialiasing)
self.ui.chartView.setCursor(Qt.CrossCursor) #设置鼠标指针为十字星
## 初始化Model/View结构
self.itemModel = QStandardItemModel(self)
self.ui.tableView.setModel(self.itemModel)
self.ui.tableView.setAlternatingRowColors(True)
self.ui.tableView.horizontalHeader().setDefaultSectionSize(80)
self.ui.tableView.verticalHeader().setDefaultSectionSize(24)
self.__iniChart() # 初始化图表
self.ui.chartView.mouseMove.connect(self.do_chartView_mouseMove)
## ==============自定义功能函数========================
def __buildStatusBar(self):
self.__labChartXY = QLabel("Chart Y= ") ##状态栏显示鼠标点的坐标
self.__labChartXY.setMinimumWidth(200)
self.ui.statusBar.addWidget(self.__labChartXY)
self.__labHoverXY = QLabel("Hovered candle")
self.__labHoverXY.setMinimumWidth(200)
self.ui.statusBar.addWidget(self.__labHoverXY)
self.__labClickXY = QLabel("Clicked candle")
## self.__labClickXY.setMinimumWidth(200)
self.ui.statusBar.addPermanentWidget(self.__labClickXY)
def __iniChart(self):
self.chart = QChart() #创建 Chart
self.chart.setTitle("股票日线图")
self.chart.setTheme(
QChart.ChartThemeBlueCerulean
) #ChartThemeBlueCerulean, ChartThemeQt,ChartThemeBlueNcs,ChartThemeDark
self.ui.chartView.setChart(self.chart) #Chart添加到ChartView
## X 轴是QDateTimeAxis
self.__axisX = QDateTimeAxis()
dateFormat = self.ui.comboDateFormat.currentText() #如"MM-dd"
self.__axisX.setFormat(dateFormat) #标签格式
self.__axisX.setTickCount(10) #主分隔个数
self.__axisX.setTitleText("日期") #标题
dateMin = QDateTime.fromString("2018-01-01", "yyyy-MM-dd")
self.__axisX.setMin(dateMin)
dateMax = dateMin.addDays(150)
self.__axisX.setMax(dateMax)
self.chart.addAxis(self.__axisX, Qt.AlignBottom)
## Y 轴是 QValueAxis
self.__axisY = QValueAxis()
self.__axisY.setTitleText("Value")
self.__axisY.setRange(0, 20)
self.__axisY.setTickCount(5)
self.__axisY.setLabelFormat("%.2f") #标签格式
self.chart.addAxis(self.__axisY, Qt.AlignLeft)
def __loadData(self, allLines): ##从字符串列表读取数据构建数据模型
rowCount = len(allLines) #文本行数，第1行是标题
self.itemModel.setRowCount(rowCount - 1) #实际数据行数
## 设置表头
header = allLines[0].strip() #第1行是表头
headerList = header.split()
self.itemModel.setHorizontalHeaderLabels(headerList) #设置表头文字
colCount = len(headerList) #列数
self.itemModel.setColumnCount(colCount) #数据列数
## 设置模型数据
for i in range(rowCount - 1):
lineText = allLines[i + 1].strip() #获取 数据区 的一行
tmpList = lineText.split()
for j in range(colCount):
item = QStandardItem(tmpList[j]) #创建item
item.setTextAlignment(Qt.AlignHCenter)
self.itemModel.setItem(i, j, item) #为模型的某个行列位置设置Item
def __drawChart(self): ##绘制图表
self.chart.removeAllSeries() #删除所有序列
self.chart.setTitle("股票日线图--" + self.ui.tabWidget.tabText(0))
## 1. 创建蜡烛图
seriesCandle = QCandlestickSeries()
seriesCandle.setName("蜡烛图")
seriesCandle.setIncreasingColor(Qt.red) #暴涨
seriesCandle.setDecreasingColor(Qt.darkGreen) #暴跌
visible = self.ui.chkBox_Outline.isChecked()
seriesCandle.setBodyOutlineVisible(visible)
seriesCandle.setCapsVisible(self.ui.chkBox_Caps.isChecked())
self.chart.addSeries(seriesCandle)
seriesCandle.attachAxis(self.__axisX)
seriesCandle.attachAxis(self.__axisY)
seriesCandle.clicked.connect(self.do_candleClicked)
seriesCandle.hovered.connect(self.do_candleHovered)
## 2. 创建MA曲线
pen = QPen()
pen.setWidth(2)
seriesMA1 = QLineSeries() #不能使用QSplineSeries
seriesMA1.setName("MA5")
pen.setColor(Qt.magenta)
seriesMA1.setPen(pen)
self.chart.addSeries(seriesMA1)
seriesMA1.attachAxis(self.__axisX)
seriesMA1.attachAxis(self.__axisY)
seriesMA2 = QLineSeries()
seriesMA2.setName("MA10")
pen.setColor(Qt.yellow)
seriesMA2.setPen(pen)
self.chart.addSeries(seriesMA2)
seriesMA2.attachAxis(self.__axisX)
seriesMA2.attachAxis(self.__axisY)
seriesMA3 = QLineSeries()
seriesMA3.setName("MA20")
pen.setColor(Qt.cyan)
seriesMA3.setPen(pen)
self.chart.addSeries(seriesMA3)
seriesMA3.attachAxis(self.__axisX)
seriesMA3.attachAxis(self.__axisY)
seriesMA4 = QLineSeries()
seriesMA4.setName("MA60")
pen.setColor(Qt.green) #green
seriesMA4.setPen(pen)
self.chart.addSeries(seriesMA4)
seriesMA4.attachAxis(self.__axisX)
seriesMA4.attachAxis(self.__axisY)
## 3. 填充数据到序列
dataRowCount = self.itemModel.rowCount() #数据点个数
for i in range(dataRowCount):
dateStr = self.itemModel.item(i, 0).text() #日期字符串，如"2017/02/03"
dateValue = QDate.fromString(dateStr, "yyyy/MM/dd") #QDate
dtValue = QDateTime(dateValue) #日期时间 QDateTime
timeStamp = dtValue.toMSecsSinceEpoch() #毫秒数
oneCandle = QCandlestickSet() #QCandlestickSet
oneCandle.setOpen(float(self.itemModel.item(i, 1).text())) #开盘
oneCandle.setHigh(float(self.itemModel.item(i, 2).text())) #最高
oneCandle.setLow(float(self.itemModel.item(i, 3).text())) #最低
oneCandle.setClose(float(self.itemModel.item(i, 4).text())) #收盘
oneCandle.setTimestamp(timeStamp) #时间戳
seriesCandle.append(oneCandle) #添加到序列
M1 = float(self.itemModel.item(i, 5).text())
M2 = float(self.itemModel.item(i, 6).text())
M3 = float(self.itemModel.item(i, 7).text())
M4 = float(self.itemModel.item(i, 8).text())
seriesMA1.append(timeStamp, M1)
seriesMA2.append(timeStamp, M2)
seriesMA3.append(timeStamp, M3)
seriesMA4.append(timeStamp, M4)
## 4. 设置坐标轴范围
minDateStr = self.itemModel.item(0, 0).text() #日期字符串，如"2017/02/03"
minDate = QDate.fromString(minDateStr, "yyyy/MM/dd") #QDate
minDateTime = QDateTime(minDate) #最小日期时间,QDateTime
maxDateStr = self.itemModel.item(dataRowCount - 1,
0).text() #日期字符串，如"2017/05/03"
maxDate = QDate.fromString(maxDateStr, "yyyy/MM/dd")
maxDateTime = QDateTime(maxDate) #最大日期时间
self.__axisX.setRange(minDateTime, maxDateTime) #日期时间范围
dateFormat = self.ui.comboDateFormat.currentText() #格式，如"MM-dd"
self.__axisX.setFormat(dateFormat) #标签格式
self.__axisY.applyNiceNumbers() #自动
for marker in self.chart.legend().markers(): #QLegendMarker类型列表
marker.clicked.connect(self.do_LegendMarkerClicked)
## ==============event处理函数==========================
## ==========由connectSlotsByName()自动连接的槽函数============
@pyqtSlot() ##“打开文件”按钮
def on_actOpen_triggered(self):
curPath = QDir.currentPath()
filename, flt = QFileDialog.getOpenFileName(
self, "打开一个文件", curPath, "股票数据文件(*.txt);;所有文件(*.*)")
if (filename == ""):
return
aFile = open(filename, 'r')
allLines = aFile.readlines() #读取所有行,list类型,每行末尾带有 \n
aFile.close()
fileInfo = QFileInfo(filename)
QDir.setCurrent(fileInfo.absolutePath())
self.ui.tabWidget.setTabText(0, fileInfo.baseName())
self.__loadData(allLines) # 载入数据到数据模型
self.__drawChart() # 绘制图表
self.ui.tab_Setup.setEnabled(True)
@pyqtSlot()
def on_actZoomIn_triggered(self):
self.ui.chartView.chart().zoom(1.2)
@pyqtSlot()
def on_actZoomOut_triggered(self):
self.ui.chartView.chart().zoom(0.8)
@pyqtSlot()
def on_actZoomReset_triggered(self):
self.ui.chartView.chart().zoomReset()
##图表外观控制
@pyqtSlot(int) ##主题
def on_comboTheme_currentIndexChanged(self, index):
self.ui.chartView.chart().setTheme(QChart.ChartTheme(index))
@pyqtSlot(bool) ##显示图例
def on_chkBox_Legend_clicked(self, checked):
self.ui.chartView.chart().legend().setVisible(checked)
## 蜡烛图
@pyqtSlot(bool) ##capsVisible
def on_chkBox_Caps_clicked(self, checked):
seriesCandle = self.chart.series()[0]
seriesCandle.setCapsVisible(checked)
@pyqtSlot(bool) ##bodyOutlineVisible
def on_chkBox_Outline_clicked(self, checked):
seriesCandle = self.chart.series()[0]
seriesCandle.setBodyOutlineVisible(checked)
## Y轴--QValueAxis
@pyqtSlot() ##设置坐标范围
def on_btnY_SetRange_clicked(self):
self.__axisY.setRange(self.ui.spinY_Min.value(),
self.ui.spinY_Max.value())
@pyqtSlot(int) ##分度数
def on_spinY_Ticks_valueChanged(self, arg1):
self.__axisY.setTickCount(arg1)
## X轴--QDateTimeAxis
@pyqtSlot(str) ##标签格式
def on_comboDateFormat_currentIndexChanged(self, arg1):
self.__axisX.setFormat(arg1)
@pyqtSlot(int) ##分度数
def on_btnX_Ticks_valueChanged(self, arg1):
self.__axisX.setTickCount(arg1)
## =============自定义槽函数===============================
def do_LegendMarkerClicked(self):
marker = self.sender() #QLegendMarker
marker.series().setVisible(not marker.series().isVisible())
marker.setVisible(True)
alpha = 1.0
if not marker.series().isVisible():
alpha = 0.5
brush = marker.labelBrush() #QBrush
color = brush.color() #QColor
color.setAlphaF(alpha)
brush.setColor(color)
marker.setLabelBrush(brush)
brush = marker.brush()
color = brush.color()
color.setAlphaF(alpha)
brush.setColor(color)
marker.setBrush(brush)
pen = marker.pen() #QPen
color = pen.color()
color.setAlphaF(alpha)
pen.setColor(color)
marker.setPen(pen)
if marker.type() == QLegendMarker.LegendMarkerTypeCandlestick:
QMessageBox.information(self, "提示", "蜡烛图序列无法隐藏")
def do_chartView_mouseMove(self, point):
pt = self.chart.mapToValue(point) #QPointF 转换为图表的数值
self.__labChartXY.setText("Chart Y=%.2f" % (pt.y())) #状态栏显示
def do_candleClicked(self, dataSet):
valOpen = dataSet.open()
valClose = dataSet.close()
valHigh = dataSet.high()
valLow = dataSet.low()
price = "开盘%.2f, 收盘%.2f, 最高%.2f, 最低%.2f" % (valOpen, valClose, valHigh,
valLow)
timeStamp = dataSet.timestamp() #时间戳数据
dt = QDateTime.fromMSecsSinceEpoch(timeStamp)
dateStr = dt.toString("yyyy-MM-dd, ")
self.__labClickXY.setText(dateStr + price)
def do_candleHovered(self, status, dataSet):
if status == False:
self.__labHoverXY.setText("Hovered candle")
return
valOpen = dataSet.open()
valClose = dataSet.close()
valHigh = dataSet.high()
valLow = dataSet.low()
price = "开盘%.2f, 收盘%.2f, 最高%.2f, 最低%.2f" % (valOpen, valClose, valHigh,
valLow)
timeStamp = dataSet.timestamp() #时间戳数据
dt = QDateTime.fromMSecsSinceEpoch(timeStamp)
dateStr = dt.toString("yyyy-MM-dd, ")
self.__labHoverXY.setText(dateStr + price)
class ChartView(QChartView):
def __init__(self, *args, **kwargs):
super(ChartView, self).__init__(*args, **kwargs)
self.setRenderHint(QPainter.Antialiasing) # 抗锯齿
self._chart = QChart(title="词频图")
# 提示widget
self.toolTipWidget = GraphicsProxyWidget(self._chart)
# line 宽度需要调整
self.lineItem = QGraphicsLineItem(self._chart)
pen = QPen(Qt.gray)
self.lineItem.setPen(pen)
self.lineItem.setZValue(998)
self.lineItem.hide()
self._chart.setAcceptHoverEvents(True)
# Series动画
self._chart.setAnimationOptions(QChart.SeriesAnimations)
def mouseMoveEvent(self, event):
super(ChartView, self).mouseMoveEvent(event)
pos = event.pos()
# 把鼠标位置所在点转换为对应的xy值
x = self._chart.mapToValue(pos).x()
y = self._chart.mapToValue(pos).y()
index = round(x)
# 得到在坐标系中的所有bar的类型和点
try:
serie = self._chart.series()[0]
except:
return
bars = [
(bar, bar.at(index)) for bar in serie.barSets()
if self.min_x <= x <= self.max_x and self.min_y <= y <= self.max_y
]
if bars:
right_top = self._chart.mapToPosition(
QPointF(self.max_x, self.max_y))
# 等分距离比例
step_x = round(
(right_top.x() - self.point_top.x()) / self.category_len)
posx = self._chart.mapToPosition(QPointF(x, self.min_y))
self.lineItem.setLine(posx.x(), self.point_top.y(), posx.x(),
posx.y())
self.lineItem.show()
try:
title = self.categories[index]
except:
title = ""
t_width = self.toolTipWidget.width()
t_height = self.toolTipWidget.height()
# 如果鼠标位置离右侧的距离小于tip宽度
x = pos.x() - t_width if self.width() - \
pos.x() - 20 < t_width else pos.x()
# 如果鼠标位置离底部的高度小于tip高度
y = pos.y() - t_height if self.height() - \
pos.y() - 20 < t_height else pos.y()
self.toolTipWidget.show(title, bars, QPoint(x, y))
else:
self.toolTipWidget.hide()
self.lineItem.hide()
def handleMarkerClicked(self):
marker = self.sender() # 信号发送者
if not marker:
return
bar = marker.barset()
if not bar:
return
# bar透明度
brush = bar.brush()
color = brush.color()
alpha = 0.0 if color.alphaF() == 1.0 else 1.0
color.setAlphaF(alpha)
brush.setColor(color)
bar.setBrush(brush)
# marker
brush = marker.labelBrush()
color = brush.color()
alpha = 0.4 if color.alphaF() == 1.0 else 1.0
# 设置label的透明度
color.setAlphaF(alpha)
brush.setColor(color)
marker.setLabelBrush(brush)
# 设置marker的透明度
brush = marker.brush()
color = brush.color()
color.setAlphaF(alpha)
brush.setColor(color)
marker.setBrush(brush)
def handleMarkerHovered(self, status):
# 设置bar的画笔宽度
marker = self.sender() # 信号发送者
if not marker:
return
bar = marker.barset()
if not bar:
return
pen = bar.pen()
if not pen:
return
pen.setWidth(pen.width() + (1 if status else -1))
bar.setPen(pen)
def handleBarHoverd(self, status, index):
# 设置bar的画笔宽度
bar = self.sender() # 信号发送者
pen = bar.pen()
if not pen:
return
pen.setWidth(pen.width() + (1 if status else -1))
bar.setPen(pen)
def initChart(self, common):
self.categories = [item[0] for item in common]
series = QBarSeries(self._chart)
bar = QBarSet("")
# 随机数据
for item in common:
bar.append(item[1])
series.append(bar)
bar.hovered.connect(self.handleBarHoverd) # 鼠标悬停
self._chart.addSeries(series)
self._chart.createDefaultAxes() # 创建默认的轴
# x轴
axis_x = QBarCategoryAxis(self._chart)
axis_x.append(self.categories)
self._chart.setAxisX(axis_x, series)
# chart的图例
legend = self._chart.legend()
legend.setVisible(True)
# 遍历图例上的标记并绑定信号
for marker in legend.markers():
# 点击事件
marker.clicked.connect(self.handleMarkerClicked)
# 鼠标悬停事件
marker.hovered.connect(self.handleMarkerHovered)
# 一些固定计算，减少mouseMoveEvent中的计算量
# 获取x和y轴的最小最大值
axisX, axisY = self._chart.axisX(), self._chart.axisY()
self.category_len = len(axisX.categories())
self.min_x, self.max_x = -0.5, self.category_len - 0.5
self.min_y, self.max_y = axisY.min(), axisY.max()
# 坐标系中左上角顶点
self.point_top = self._chart.mapToPosition(
QPointF(self.min_x, self.max_y))
self.setChart(self._chart)
