def drawItem(self, item, painter, option):
"""
Draws the inputed item as a bar graph.
:param item | <XChartDatasetItem>
painter | <QPainter>
option | <QStyleOptionGraphicsItem>
"""
dataset = item.dataset()
painter.save()
painter.setRenderHint(painter.Antialiasing)
pen = QPen(dataset.color())
pen.setWidth(0.75)
painter.setPen(pen)
for path in item.buildData('subpaths', []):
gradient = QLinearGradient()
clr = QColor(dataset.color())
clr.setAlpha(220)
gradient.setColorAt(0.0, clr.lighter(180))
gradient.setColorAt(0.1, clr.lighter(160))
gradient.setColorAt(0.25, clr.lighter(140))
gradient.setColorAt(1.0, clr.lighter(125))
if self.orientation() == Qt.Vertical:
gradient.setStart(0, path.boundingRect().bottom())
gradient.setFinalStop(0, path.boundingRect().top())
else:
gradient.setStart(path.boundingRect().left(), 0)
gradient.setFinalStop(path.boundingRect().right(), 0)
painter.setBrush(gradient)
painter.drawPath(path)
painter.restore()
def drawItem(self, item, painter, option):
"""
Draws the inputed item as a bar graph.
:param item | <XChartDatasetItem>
painter | <QPainter>
option | <QStyleOptionGraphicsItem>
"""
dataset = item.dataset()
painter.save()
painter.setRenderHint(painter.Antialiasing)
pen = QPen(dataset.color())
pen.setWidth(0.75)
painter.setPen(pen)
for path in item.buildData('subpaths', []):
gradient = QLinearGradient()
clr = QColor(dataset.color())
clr.setAlpha(220)
gradient.setColorAt(0.0, clr.lighter(180))
gradient.setColorAt(0.1, clr.lighter(160))
gradient.setColorAt(0.25, clr.lighter(140))
gradient.setColorAt(1.0, clr.lighter(125))
if self.orientation() == Qt.Vertical:
gradient.setStart(0, path.boundingRect().bottom())
gradient.setFinalStop(0, path.boundingRect().top())
else:
gradient.setStart(path.boundingRect().left(), 0)
gradient.setFinalStop(path.boundingRect().right(), 0)
painter.setBrush(gradient)
painter.drawPath(path)
painter.restore()
class XChartWidgetItem(QGraphicsPathItem):
def __init__(self):
super(XChartWidgetItem, self).__init__()
self.setAcceptHoverEvents(True)
# set default information
self._chartType = None
self._pieCenter = QPointF(0, 0)
self._subpaths = []
self._keyColors = {}
self._ellipses = []
self._keyToolTips = {}
self._showPointsInLine = True
self._shaded = True
self._dragData = {}
self._radius = 6
self._title = ''
self._color = self.randomColor()
self._alternateColor = self._color.lighter(140)
self._points = []
self._barSize = 30
self._orientation = Qt.Horizontal
self._pieAxis = Qt.YAxis
self._pointRadius = 6
self._horizontalOffset = 0
self._verticalOffset = 0
self._hoveredPath = None
self._dirty = False
self._buildData = {}
def addPoint(self, x, y):
"""
Adds a new chart point to this item.
:param x | <variant>
y | <variant>
"""
self._points.append((x, y))
self._dirty = True
def alternateColor(self):
"""
Returns the alternate color for this item.
:return <QColor>
"""
return QColor(self._alternateColor)
def barSize(self):
"""
Returns the size that the bar chart should be rendered with.
:return <int>
"""
return self._barSize
def chartType(self):
"""
Returns the chart type for this item. If no type is explicitely set,
then the scenes chart type will be utilized.
:return <XChartScene.Type>
"""
if (self._chartType):
return self._chartType
scene = self.scene()
if (not scene):
return 0
return scene.chartType()
def clear(self):
"""
Clears the chart points from this item.
"""
self._points = []
self._dirty = True
def color(self):
"""
Returns the primary color for this item.
:return <QColor>
"""
return QColor(self._color)
def dragData(self, x=None, y=None):
"""
Returns any drag information that will be used from this chart item.
:return <QMimeData> || None
"""
# look for specific drag information for this item
first = (x, y)
second = (x, None)
third = (None, y)
fourth = (None, None)
for key in (first, second, third, fourth):
data = self._dragData.get(key)
if data:
return data
return None
def hasCustomType(self):
"""
Returns true if this item defines its own chart type.
:return <bool>
"""
return self._chartType != None
def horizontalRuler(self):
"""
Returns the horizontal ruler for this widget item.
:return <projexui.widgets.xchartwidget.XChartRuler> || None
"""
if (not self.scene()):
return None
return self.scene().horizontalRuler()
def horizontalOffset(self):
"""
Returns the horizontal offset for this item.
:return <int>
"""
return self._horizontalOffset
def hoverMoveEvent(self, event):
"""
Tracks whether or not this item is being hovered.
:param event | <QEvent>
"""
point = event.pos()
found_key = ''
found = None
for key, value, subpath in self._subpaths:
if subpath.contains(point):
found = subpath
found_key = key
break
if found:
# update the tooltip
tip = self.keyToolTip(found_key)
if (tip):
widget = self.scene().chartWidget()
anchor = XPopupWidget.Anchor.RightCenter
# show the popup widget
XPopupWidget.showToolTip(tip,
anchor=anchor,
parent=widget,
foreground=self.color().darker(120),
background=self.alternateColor())
if (found != self._hoveredPath):
self._hoveredPath = found
self.update()
def hoverLeaveEvent(self, event):
"""
Tracks whether or not this item is being hovered.
:param event | <QEvent>
"""
super(XChartWidgetItem, self).hoverEnterEvent(event)
self._hoveredPath = None
self.update()
def isShaded(self):
"""
Returns the shaded state for this item.
:return <bool>
"""
return self._shaded
def keyColor(self, key):
"""
Returns a color for the inputed key (used in pie charts).
:param key | <str>
:return <QColor>
"""
self._keyColors.setdefault(nativestring(key), self.color())
return self._keyColors[nativestring(key)]
def keyToolTip(self, key):
"""
Returns the tool tip for this key.
:param key | <str>
:return <str>
"""
return self._keyToolTips.get(nativestring(key), '')
def mousePressEvent(self, event):
"""
Creates the drag event for this item.
:param event | <QMousePressEvent>
"""
near_x, near_y = self.nearestPoint(event.pos())
data = self.dragData(x=near_x, y=near_y)
self.startDrag(data)
super(XChartWidgetItem, self).mousePressEvent(event)
def nearestPoint(self, pos):
"""
Returns the nearest graphing point for this item based on the
inputed graph position.
:param pos | <QPoint>
:return (<variant> x, <variant> y)
"""
# lookup subpaths
for x, y, path in self._subpaths:
if path.contains(pos):
return (x, y)
return (None, None)
def orientation(self):
"""
Returns the orienatation for this item (used in bar charts).
:return <Qt.Orienation>
"""
return self._orientation
def paint(self, painter, option, widget):
"""
Draws this item with the inputed painter.
:param painter | <QPainter>
rect | <QRect>
"""
if self._dirty:
self.rebuild()
scene = self.scene()
if not scene:
return
grid = scene.gridRect()
typ = self.chartType()
# draw the line chart
if typ == XChartScene.Type.Line:
painter.setRenderHint(painter.Antialiasing)
# draw the path area
area = self._buildData.get('path_area')
if area and self.isShaded():
clr = QColor(self.color())
clr.setAlpha(120)
painter.setPen(Qt.NoPen)
painter.setBrush(clr)
painter.drawPath(area)
# draw the line data
pen = QPen(self.color())
pen.setWidth(2)
painter.setPen(pen)
painter.setBrush(Qt.NoBrush)
painter.drawPath(self.path())
if (self.showPointsInLine()):
palette = QApplication.palette()
pen = QPen(palette.color(palette.Base))
pen.setWidth(2)
painter.setBrush(self.color())
painter.setPen(pen)
for point in self._ellipses:
painter.drawEllipse(point, self.pointRadius(),
self.pointRadius())
# draw a bar chart
elif typ == XChartScene.Type.Bar:
painter.setRenderHint(painter.Antialiasing)
pen = QPen(self.color())
pen.setWidth(1)
painter.setPen(pen)
for key, value, sub_path in self._subpaths:
gradient = QLinearGradient()
clr = QColor(self.color())
if (sub_path != self._hoveredPath):
clr.setAlpha(130)
gradient.setColorAt(0.0, clr.lighter(140))
gradient.setColorAt(0.1, clr.lighter(120))
gradient.setColorAt(0.25, clr.lighter(110))
gradient.setColorAt(1.0, clr.lighter(105))
if (self.orientation() == Qt.Horizontal):
gradient.setStart(0, sub_path.boundingRect().top())
gradient.setFinalStop(0, sub_path.boundingRect().bottom())
else:
gradient.setStart(sub_path.boundingRect().left(), 0)
gradient.setFinalStop(sub_path.boundingRect().right(), 0)
painter.setBrush(gradient)
painter.drawPath(sub_path)
# draw a simple pie chart (calculated by scene)
elif typ == XChartScene.Type.Pie:
painter.setRenderHint(painter.Antialiasing)
center = self.pieCenter()
radius = self.radius()
for key, value, sub_path in self._subpaths:
clr = self.keyColor(key)
gradient = QRadialGradient(QPointF(0, 0), radius)
a = QColor(clr.lighter(140))
b = QColor(clr.lighter(110))
a.setAlpha(40)
b.setAlpha(80)
# look for mouse over
if (sub_path == self._hoveredPath):
a.setAlpha(100)
b.setAlpha(200)
gradient.setColorAt(0, a)
gradient.setColorAt(1, b)
pen = QPen(clr)
pen.setWidth(1)
painter.setBrush(gradient)
painter.setPen(pen)
painter.drawPath(sub_path)
def pieAxis(self):
"""
Returns the axis that is used as the pie value for this item.
:return <Qt.Axis>
"""
return self._pieAxis
def pieCenter(self):
"""
Returns the center point for the pie for this item.
:return <QPointF>
"""
return self._pieCenter
def pointRadius(self):
"""
Returns the radius for individual points on the line.
:return <int>
"""
return self._pointRadius
def randomColor(self):
"""
Generates a random color.
:return <QColor>
"""
r = random.randint(120, 180)
g = random.randint(120, 180)
b = random.randint(120, 180)
return QColor(r, g, b)
def radius(self):
"""
Returns the radius for this item for the pie chart.
:return <float>
"""
return self._radius
def rebuild(self):
"""
Rebuilds the item based on the current points.
"""
scene = self.scene()
if not scene:
return
self._subpaths = []
grid = scene.gridRect()
typ = self.chartType()
hruler = scene.horizontalRuler()
vruler = scene.verticalRuler()
path = QPainterPath()
area = QPainterPath()
self._buildData.clear()
self._buildData['path_area'] = area
self.setPos(0, 0)
# draw a line item
if typ == XChartScene.Type.Line:
first = True
pos = None
home = None
self._ellipses = []
points = self.points()
if (self.orientation() == Qt.Horizontal):
points.sort(hruler.compareValues, key=lambda x: x[0])
else:
points.sort(vruler.compareValues, key=lambda y: y[1])
points.reverse()
for x, y in self.points():
pos = scene.mapFromChart(x, y)
if first:
home = QPointF(pos.x(), grid.bottom())
area.moveTo(home)
area.lineTo(pos)
path.moveTo(pos)
self._ellipses.append(pos)
first = False
else:
path.lineTo(pos)
area.lineTo(pos)
self._ellipses.append(pos)
if pos and home:
area.lineTo(pos.x(), grid.bottom())
area.lineTo(home)
# draw a bar item
elif typ == XChartScene.Type.Bar:
barsize = self.barSize()
horiz = self.orientation() == Qt.Horizontal
for x, y in self.points():
pos = scene.mapFromChart(x, y)
subpath = QPainterPath()
if horiz:
r = min(grid.bottom() - pos.y(), 8)
subpath.moveTo(pos.x() - barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, pos.y() + r)
subpath.quadTo(pos.x() - barsize / 2.0, pos.y(),
pos.x() - barsize / 2.0 + r, pos.y())
subpath.lineTo(pos.x() + barsize / 2.0 - r, pos.y())
subpath.quadTo(pos.x() + barsize / 2.0, pos.y(),
pos.x() + barsize / 2.0,
pos.y() + r)
subpath.lineTo(pos.x() + barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, grid.bottom())
else:
subpath.moveTo(grid.left(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() - barsize / 2.0)
path.addPath(subpath)
self._subpaths.append((x, y, subpath))
# draw a pie chart
elif typ == XChartScene.Type.Pie:
if self.orientation() == Qt.Horizontal:
key_index = 0
value_index = 1
value_ruler = self.verticalRuler()
else:
key_index = 1
value_index = 0
value_ruler = self.horizontalRuler()
pie_values = {}
for point in self.points():
key = point[key_index]
value = point[value_index]
pie_values.setdefault(key, [])
pie_values[key].append(value)
for key, values in pie_values.items():
pie_values[key] = value_ruler.calcTotal(values)
total = max(1, value_ruler.calcTotal(pie_values.values()))
# calculate drawing parameters
center = self.pieCenter()
radius = self.radius()
diameter = radius * 2
angle = 0
bound = QRectF(-radius, -radius, diameter, diameter)
for key, value in sorted(pie_values.items(), key=lambda x: x[1]):
# calculate the percentage
perc = float(value) / total
# calculate the angle as the perc * 360
item_angle = perc * 360
self.setPos(center)
sub_path = QPainterPath()
sub_path.arcTo(bound, angle, item_angle)
sub_path.lineTo(0, 0)
path.addPath(sub_path)
self._subpaths.append((key, value, sub_path))
angle += item_angle
self.setPath(path)
self._dirty = False
def points(self):
"""
Returns a list of the points for this item.
:return [(<variant> x, <variant> y), ..]
"""
return self._points
def setAlternateColor(self, color):
"""
Sets the alternate color for this widget to the inputed color.
:param color | <QColor>
"""
self._alternateColor = QColor(color)
def setChartType(self, chartType):
"""
Sets the chart type for this item. Setting the item to a None chart
type will signal it to use the default scenes chart type.
:param chartType | <XChartScene.Type>
"""
self._chartType = chartType
self._dirty = True
def setColor(self, color):
"""
Sets the color for this widget to the inputed color.
:param color | <QColor>
"""
self._color = QColor(color)
self.setAlternateColor(self._color.lighter(140))
def setDirty(self, state=True):
"""
Sets whether or not this item is dirty.
:param state | <bool>
"""
self._dirty
def setDragData(self, data, x=None, y=None):
"""
Sets the drag data for this chart item to the inputed data.
:param data | <QMimeData> || None
"""
self._dragData[(x, y)] = data
def setKeyColor(self, key, color):
"""
Sets the color used when rendering pie charts.
:param key | <str>
color | <QColor>
"""
self._keyColors[nativestring(key)] = QColor(color)
def setKeyToolTip(self, key, tip):
"""
Sets the tool tip for the specified key.
:param key | <str>
tip | <str>
"""
self._keyToolTips[nativestring(key)] = tip
def setHorizontalOffset(self, offset):
"""
Sets the horizontal offset for this item.
:param offset | <int>
"""
self._horizontalOffset = offset
def setPieCenter(self, center):
"""
Sets the center for the pie for the chart.
:param center | <QPointF>
"""
self._pieCenter = center
def setPointRadius(self, radius):
"""
Sets the point radius for this line.
:param radius | <int>
"""
self._pointRadius = radius
def setPoints(self, points):
"""
Sets the points values for this chart widget item.
:param points | [(<variant> x, <variant> y), ..]
"""
self._points = points[:]
def setPos(self, *args):
super(XChartWidgetItem, self).setPos(*args)
if (self._horizontalOffset or self._verticalOffset):
offset = QPointF(self._horizontalOffset, self._verticalOffset)
super(XChartWidgetItem, self).setPos(self.pos() + offset)
def setPieAxis(self, pieAxis):
"""
Sets the axis that will be used for the pie chart for this item. This
will only apply when the item itself defines itself as a pie chart,
otherwise, the scene will determine it when the scene is rendered as a
pie chart.
:param pieAxis | <Qt.Axis>
"""
self._pieAxis = pieAxis
def setRadius(self, radius):
"""
Sets the radius size for this item.
:param radius | <float>
"""
self._radius = radius
def setShaded(self, state):
"""
Sets whether or not to shade line items in this graph.
:param state | <bool>
"""
self._shaded = state
def setShowPointsInLine(self, state):
"""
Sets whether or not to show points in line mode.
:param state | <bool>
"""
self._showPointsInLine = state
def setTitle(self, title):
"""
Sets the title text for this chart widget item.
:param title | <str>
"""
self._title = title
def startDrag(self, data):
"""
Starts dragging information from this chart widget based on the
dragData associated with this item.
"""
if not data:
return
widget = self.scene().chartWidget()
drag = QDrag(widget)
drag.setMimeData(data)
drag.exec_()
def showPointsInLine(self):
"""
Returns whether or not to show points in the line.
:return <bool>
"""
return self._showPointsInLine
def title(self):
"""
Returns the title for this item.
:return <str>
"""
return self._title
def verticalRuler(self):
"""
Returns the vertical ruler for this widget item.
:return <projexui.widgets.xchartwidget.XChartRuler> || None
"""
if (not self.scene()):
return None
return self.scene().verticalRuler()
def paint(self, painter, option, widget):
"""
Draws this item with the inputed painter.
:param painter | <QPainter>
rect | <QRect>
"""
if self._dirty:
self.rebuild()
scene = self.scene()
if not scene:
return
grid = scene.gridRect()
typ = self.chartType()
# draw the line chart
if typ == XChartScene.Type.Line:
painter.setRenderHint(painter.Antialiasing)
# draw the path area
area = self._buildData.get('path_area')
if area and self.isShaded():
clr = QColor(self.color())
clr.setAlpha(120)
painter.setPen(Qt.NoPen)
painter.setBrush(clr)
painter.drawPath(area)
# draw the line data
pen = QPen(self.color())
pen.setWidth(2)
painter.setPen(pen)
painter.setBrush(Qt.NoBrush)
painter.drawPath(self.path())
if (self.showPointsInLine()):
palette = QApplication.palette()
pen = QPen(palette.color(palette.Base))
pen.setWidth(2)
painter.setBrush(self.color())
painter.setPen(pen)
for point in self._ellipses:
painter.drawEllipse(point, self.pointRadius(),
self.pointRadius())
# draw a bar chart
elif typ == XChartScene.Type.Bar:
painter.setRenderHint(painter.Antialiasing)
pen = QPen(self.color())
pen.setWidth(1)
painter.setPen(pen)
for key, value, sub_path in self._subpaths:
gradient = QLinearGradient()
clr = QColor(self.color())
if (sub_path != self._hoveredPath):
clr.setAlpha(130)
gradient.setColorAt(0.0, clr.lighter(140))
gradient.setColorAt(0.1, clr.lighter(120))
gradient.setColorAt(0.25, clr.lighter(110))
gradient.setColorAt(1.0, clr.lighter(105))
if (self.orientation() == Qt.Horizontal):
gradient.setStart(0, sub_path.boundingRect().top())
gradient.setFinalStop(0, sub_path.boundingRect().bottom())
else:
gradient.setStart(sub_path.boundingRect().left(), 0)
gradient.setFinalStop(sub_path.boundingRect().right(), 0)
painter.setBrush(gradient)
painter.drawPath(sub_path)
# draw a simple pie chart (calculated by scene)
elif typ == XChartScene.Type.Pie:
painter.setRenderHint(painter.Antialiasing)
center = self.pieCenter()
radius = self.radius()
for key, value, sub_path in self._subpaths:
clr = self.keyColor(key)
gradient = QRadialGradient(QPointF(0, 0), radius)
a = QColor(clr.lighter(140))
b = QColor(clr.lighter(110))
a.setAlpha(40)
b.setAlpha(80)
# look for mouse over
if (sub_path == self._hoveredPath):
a.setAlpha(100)
b.setAlpha(200)
gradient.setColorAt(0, a)
gradient.setColorAt(1, b)
pen = QPen(clr)
pen.setWidth(1)
painter.setBrush(gradient)
painter.setPen(pen)
painter.drawPath(sub_path)
class XChartWidgetItem(QGraphicsPathItem):
def __init__( self ):
super(XChartWidgetItem, self).__init__()
self.setAcceptHoverEvents(True)
# set default information
self._chartType = None
self._pieCenter = QPointF(0, 0)
self._subpaths = []
self._keyColors = {}
self._ellipses = []
self._keyToolTips = {}
self._showPointsInLine = True
self._shaded = True
self._dragData = {}
self._radius = 6
self._title = ''
self._color = self.randomColor()
self._alternateColor = self._color.lighter(140)
self._points = []
self._barSize = 30
self._orientation = Qt.Horizontal
self._pieAxis = Qt.YAxis
self._pointRadius = 6
self._horizontalOffset = 0
self._verticalOffset = 0
self._hoveredPath = None
self._dirty = False
self._buildData = {}
def addPoint( self, x, y ):
"""
Adds a new chart point to this item.
:param x | <variant>
y | <variant>
"""
self._points.append((x, y))
self._dirty = True
def alternateColor( self ):
"""
Returns the alternate color for this item.
:return <QColor>
"""
return QColor(self._alternateColor)
def barSize( self ):
"""
Returns the size that the bar chart should be rendered with.
:return <int>
"""
return self._barSize
def chartType( self ):
"""
Returns the chart type for this item. If no type is explicitely set,
then the scenes chart type will be utilized.
:return <XChartScene.Type>
"""
if ( self._chartType ):
return self._chartType
scene = self.scene()
if ( not scene ):
return 0
return scene.chartType()
def clear( self ):
"""
Clears the chart points from this item.
"""
self._points = []
self._dirty = True
def color( self ):
"""
Returns the primary color for this item.
:return <QColor>
"""
return QColor(self._color)
def dragData(self, x=None, y=None):
"""
Returns any drag information that will be used from this chart item.
:return <QMimeData> || None
"""
# look for specific drag information for this item
first = (x, y)
second = (x, None)
third = (None, y)
fourth = (None, None)
for key in (first, second, third, fourth):
data = self._dragData.get(key)
if data:
return data
return None
def hasCustomType( self ):
"""
Returns true if this item defines its own chart type.
:return <bool>
"""
return self._chartType != None
def horizontalRuler( self ):
"""
Returns the horizontal ruler for this widget item.
:return <projexui.widgets.xchartwidget.XChartRuler> || None
"""
if ( not self.scene() ):
return None
return self.scene().horizontalRuler()
def horizontalOffset( self ):
"""
Returns the horizontal offset for this item.
:return <int>
"""
return self._horizontalOffset
def hoverMoveEvent( self, event ):
"""
Tracks whether or not this item is being hovered.
:param event | <QEvent>
"""
point = event.pos()
found_key = ''
found = None
for key, value, subpath in self._subpaths:
if subpath.contains(point):
found = subpath
found_key = key
break
if found:
# update the tooltip
tip = self.keyToolTip(found_key)
if ( tip ):
widget = self.scene().chartWidget()
anchor = XPopupWidget.Anchor.RightCenter
# show the popup widget
XPopupWidget.showToolTip(tip,
anchor = anchor,
parent = widget,
foreground = self.color().darker(120),
background = self.alternateColor())
if ( found != self._hoveredPath ):
self._hoveredPath = found
self.update()
def hoverLeaveEvent( self, event ):
"""
Tracks whether or not this item is being hovered.
:param event | <QEvent>
"""
super(XChartWidgetItem, self).hoverEnterEvent(event)
self._hoveredPath = None
self.update()
def isShaded( self ):
"""
Returns the shaded state for this item.
:return <bool>
"""
return self._shaded
def keyColor( self, key ):
"""
Returns a color for the inputed key (used in pie charts).
:param key | <str>
:return <QColor>
"""
self._keyColors.setdefault(nativestring(key), self.color())
return self._keyColors[nativestring(key)]
def keyToolTip( self, key ):
"""
Returns the tool tip for this key.
:param key | <str>
:return <str>
"""
return self._keyToolTips.get(nativestring(key), '')
def mousePressEvent(self, event):
"""
Creates the drag event for this item.
:param event | <QMousePressEvent>
"""
near_x, near_y = self.nearestPoint(event.pos())
data = self.dragData(x=near_x, y=near_y)
self.startDrag(data)
super(XChartWidgetItem, self).mousePressEvent(event)
def nearestPoint(self, pos):
"""
Returns the nearest graphing point for this item based on the
inputed graph position.
:param pos | <QPoint>
:return (<variant> x, <variant> y)
"""
# lookup subpaths
for x, y, path in self._subpaths:
if path.contains(pos):
return (x, y)
return (None, None)
def orientation( self ):
"""
Returns the orienatation for this item (used in bar charts).
:return <Qt.Orienation>
"""
return self._orientation
def paint( self, painter, option, widget ):
"""
Draws this item with the inputed painter.
:param painter | <QPainter>
rect | <QRect>
"""
if self._dirty:
self.rebuild()
scene = self.scene()
if not scene:
return
grid = scene.gridRect()
typ = self.chartType()
# draw the line chart
if typ == XChartScene.Type.Line:
painter.setRenderHint(painter.Antialiasing)
# draw the path area
area = self._buildData.get('path_area')
if area and self.isShaded():
clr = QColor(self.color())
clr.setAlpha(120)
painter.setPen(Qt.NoPen)
painter.setBrush(clr)
painter.drawPath(area)
# draw the line data
pen = QPen(self.color())
pen.setWidth(2)
painter.setPen(pen)
painter.setBrush(Qt.NoBrush)
painter.drawPath(self.path())
if ( self.showPointsInLine() ):
palette = QApplication.palette()
pen = QPen(palette.color(palette.Base))
pen.setWidth(2)
painter.setBrush(self.color())
painter.setPen(pen)
for point in self._ellipses:
painter.drawEllipse(point,
self.pointRadius(),
self.pointRadius())
# draw a bar chart
elif typ == XChartScene.Type.Bar:
painter.setRenderHint(painter.Antialiasing)
pen = QPen(self.color())
pen.setWidth(1)
painter.setPen(pen)
for key, value, sub_path in self._subpaths:
gradient = QLinearGradient()
clr = QColor(self.color())
if ( sub_path != self._hoveredPath ):
clr.setAlpha(130)
gradient.setColorAt(0.0, clr.lighter(140))
gradient.setColorAt(0.1, clr.lighter(120))
gradient.setColorAt(0.25, clr.lighter(110))
gradient.setColorAt(1.0, clr.lighter(105))
if ( self.orientation() == Qt.Horizontal ):
gradient.setStart(0, sub_path.boundingRect().top())
gradient.setFinalStop(0, sub_path.boundingRect().bottom())
else:
gradient.setStart(sub_path.boundingRect().left(), 0)
gradient.setFinalStop(sub_path.boundingRect().right(), 0)
painter.setBrush(gradient)
painter.drawPath(sub_path)
# draw a simple pie chart (calculated by scene)
elif typ == XChartScene.Type.Pie:
painter.setRenderHint(painter.Antialiasing)
center = self.pieCenter()
radius = self.radius()
for key, value, sub_path in self._subpaths:
clr = self.keyColor(key)
gradient = QRadialGradient(QPointF(0, 0), radius)
a = QColor(clr.lighter(140))
b = QColor(clr.lighter(110))
a.setAlpha(40)
b.setAlpha(80)
# look for mouse over
if ( sub_path == self._hoveredPath ):
a.setAlpha(100)
b.setAlpha(200)
gradient.setColorAt(0, a)
gradient.setColorAt(1, b)
pen = QPen(clr)
pen.setWidth(1)
painter.setBrush(gradient)
painter.setPen(pen)
painter.drawPath(sub_path)
def pieAxis( self ):
"""
Returns the axis that is used as the pie value for this item.
:return <Qt.Axis>
"""
return self._pieAxis
def pieCenter( self ):
"""
Returns the center point for the pie for this item.
:return <QPointF>
"""
return self._pieCenter
def pointRadius(self):
"""
Returns the radius for individual points on the line.
:return <int>
"""
return self._pointRadius
def randomColor( self ):
"""
Generates a random color.
:return <QColor>
"""
r = random.randint(120, 180)
g = random.randint(120, 180)
b = random.randint(120, 180)
return QColor(r, g, b)
def radius( self ):
"""
Returns the radius for this item for the pie chart.
:return <float>
"""
return self._radius
def rebuild( self ):
"""
Rebuilds the item based on the current points.
"""
scene = self.scene()
if not scene:
return
self._subpaths = []
grid = scene.gridRect()
typ = self.chartType()
hruler = scene.horizontalRuler()
vruler = scene.verticalRuler()
path = QPainterPath()
area = QPainterPath()
self._buildData.clear()
self._buildData['path_area'] = area
self.setPos(0, 0)
# draw a line item
if typ == XChartScene.Type.Line:
first = True
pos = None
home = None
self._ellipses = []
points = self.points()
if ( self.orientation() == Qt.Horizontal ):
points.sort(hruler.compareValues, key = lambda x: x[0])
else:
points.sort(vruler.compareValues, key = lambda y: y[1])
points.reverse()
for x, y in self.points():
pos = scene.mapFromChart(x, y)
if first:
home = QPointF(pos.x(), grid.bottom())
area.moveTo(home)
area.lineTo(pos)
path.moveTo(pos)
self._ellipses.append(pos)
first = False
else:
path.lineTo(pos)
area.lineTo(pos)
self._ellipses.append(pos)
if pos and home:
area.lineTo(pos.x(), grid.bottom())
area.lineTo(home)
# draw a bar item
elif typ == XChartScene.Type.Bar:
barsize = self.barSize()
horiz = self.orientation() == Qt.Horizontal
for x, y in self.points():
pos = scene.mapFromChart(x, y)
subpath = QPainterPath()
if horiz:
r = min(grid.bottom() - pos.y(), 8)
subpath.moveTo(pos.x() - barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, pos.y() + r)
subpath.quadTo(pos.x() - barsize / 2.0, pos.y(),
pos.x() - barsize / 2.0 + r, pos.y())
subpath.lineTo(pos.x() + barsize / 2.0 - r, pos.y())
subpath.quadTo(pos.x() + barsize / 2.0, pos.y(),
pos.x() + barsize / 2.0, pos.y() + r)
subpath.lineTo(pos.x() + barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, grid.bottom())
else:
subpath.moveTo(grid.left(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() - barsize / 2.0)
path.addPath(subpath)
self._subpaths.append((x, y, subpath))
# draw a pie chart
elif typ == XChartScene.Type.Pie:
if self.orientation() == Qt.Horizontal:
key_index = 0
value_index = 1
value_ruler = self.verticalRuler()
else:
key_index = 1
value_index = 0
value_ruler = self.horizontalRuler()
pie_values = {}
for point in self.points():
key = point[key_index]
value = point[value_index]
pie_values.setdefault(key, [])
pie_values[key].append(value)
for key, values in pie_values.items():
pie_values[key] = value_ruler.calcTotal(values)
total = max(1, value_ruler.calcTotal(pie_values.values()))
# calculate drawing parameters
center = self.pieCenter()
radius = self.radius()
diameter = radius * 2
angle = 0
bound = QRectF(-radius, -radius, diameter, diameter)
for key, value in sorted(pie_values.items(), key = lambda x: x[1]):
# calculate the percentage
perc = float(value) / total
# calculate the angle as the perc * 360
item_angle = perc * 360
self.setPos(center)
sub_path = QPainterPath()
sub_path.arcTo(bound, angle, item_angle)
sub_path.lineTo(0, 0)
path.addPath(sub_path)
self._subpaths.append((key, value, sub_path))
angle += item_angle
self.setPath(path)
self._dirty = False
def points( self ):
"""
Returns a list of the points for this item.
:return [(<variant> x, <variant> y), ..]
"""
return self._points
def setAlternateColor( self, color ):
"""
Sets the alternate color for this widget to the inputed color.
:param color | <QColor>
"""
self._alternateColor = QColor(color)
def setChartType( self, chartType ):
"""
Sets the chart type for this item. Setting the item to a None chart
type will signal it to use the default scenes chart type.
:param chartType | <XChartScene.Type>
"""
self._chartType = chartType
self._dirty = True
def setColor( self, color ):
"""
Sets the color for this widget to the inputed color.
:param color | <QColor>
"""
self._color = QColor(color)
self.setAlternateColor(self._color.lighter(140))
def setDirty( self, state = True ):
"""
Sets whether or not this item is dirty.
:param state | <bool>
"""
self._dirty
def setDragData(self, data, x=None, y=None):
"""
Sets the drag data for this chart item to the inputed data.
:param data | <QMimeData> || None
"""
self._dragData[(x, y)] = data
def setKeyColor( self, key, color ):
"""
Sets the color used when rendering pie charts.
:param key | <str>
color | <QColor>
"""
self._keyColors[nativestring(key)] = QColor(color)
def setKeyToolTip( self, key, tip ):
"""
Sets the tool tip for the specified key.
:param key | <str>
tip | <str>
"""
self._keyToolTips[nativestring(key)] = tip
def setHorizontalOffset( self, offset ):
"""
Sets the horizontal offset for this item.
:param offset | <int>
"""
self._horizontalOffset = offset
def setPieCenter( self, center ):
"""
Sets the center for the pie for the chart.
:param center | <QPointF>
"""
self._pieCenter = center
def setPointRadius(self, radius):
"""
Sets the point radius for this line.
:param radius | <int>
"""
self._pointRadius = radius
def setPoints(self, points):
"""
Sets the points values for this chart widget item.
:param points | [(<variant> x, <variant> y), ..]
"""
self._points = points[:]
def setPos( self, *args ):
super(XChartWidgetItem, self).setPos(*args)
if ( self._horizontalOffset or self._verticalOffset ):
offset = QPointF(self._horizontalOffset, self._verticalOffset)
super(XChartWidgetItem, self).setPos(self.pos() + offset)
def setPieAxis( self, pieAxis ):
"""
Sets the axis that will be used for the pie chart for this item. This
will only apply when the item itself defines itself as a pie chart,
otherwise, the scene will determine it when the scene is rendered as a
pie chart.
:param pieAxis | <Qt.Axis>
"""
self._pieAxis = pieAxis
def setRadius( self, radius ):
"""
Sets the radius size for this item.
:param radius | <float>
"""
self._radius = radius
def setShaded( self, state ):
"""
Sets whether or not to shade line items in this graph.
:param state | <bool>
"""
self._shaded = state
def setShowPointsInLine( self, state ):
"""
Sets whether or not to show points in line mode.
:param state | <bool>
"""
self._showPointsInLine = state
def setTitle( self, title ):
"""
Sets the title text for this chart widget item.
:param title | <str>
"""
self._title = title
def startDrag(self, data):
"""
Starts dragging information from this chart widget based on the
dragData associated with this item.
"""
if not data:
return
widget = self.scene().chartWidget()
drag = QDrag(widget)
drag.setMimeData(data)
drag.exec_()
def showPointsInLine( self ):
"""
Returns whether or not to show points in the line.
:return <bool>
"""
return self._showPointsInLine
def title( self ):
"""
Returns the title for this item.
:return <str>
"""
return self._title
def verticalRuler( self ):
"""
Returns the vertical ruler for this widget item.
:return <projexui.widgets.xchartwidget.XChartRuler> || None
"""
if ( not self.scene() ):
return None
return self.scene().verticalRuler()
def paint( self, painter, option, widget ):
"""
Draws this item with the inputed painter.
:param painter | <QPainter>
rect | <QRect>
"""
if self._dirty:
self.rebuild()
scene = self.scene()
if not scene:
return
grid = scene.gridRect()
typ = self.chartType()
# draw the line chart
if typ == XChartScene.Type.Line:
painter.setRenderHint(painter.Antialiasing)
# draw the path area
area = self._buildData.get('path_area')
if area and self.isShaded():
clr = QColor(self.color())
clr.setAlpha(120)
painter.setPen(Qt.NoPen)
painter.setBrush(clr)
painter.drawPath(area)
# draw the line data
pen = QPen(self.color())
pen.setWidth(2)
painter.setPen(pen)
painter.setBrush(Qt.NoBrush)
painter.drawPath(self.path())
if ( self.showPointsInLine() ):
palette = QApplication.palette()
pen = QPen(palette.color(palette.Base))
pen.setWidth(2)
painter.setBrush(self.color())
painter.setPen(pen)
for point in self._ellipses:
painter.drawEllipse(point,
self.pointRadius(),
self.pointRadius())
# draw a bar chart
elif typ == XChartScene.Type.Bar:
painter.setRenderHint(painter.Antialiasing)
pen = QPen(self.color())
pen.setWidth(1)
painter.setPen(pen)
for key, value, sub_path in self._subpaths:
gradient = QLinearGradient()
clr = QColor(self.color())
if ( sub_path != self._hoveredPath ):
clr.setAlpha(130)
gradient.setColorAt(0.0, clr.lighter(140))
gradient.setColorAt(0.1, clr.lighter(120))
gradient.setColorAt(0.25, clr.lighter(110))
gradient.setColorAt(1.0, clr.lighter(105))
if ( self.orientation() == Qt.Horizontal ):
gradient.setStart(0, sub_path.boundingRect().top())
gradient.setFinalStop(0, sub_path.boundingRect().bottom())
else:
gradient.setStart(sub_path.boundingRect().left(), 0)
gradient.setFinalStop(sub_path.boundingRect().right(), 0)
painter.setBrush(gradient)
painter.drawPath(sub_path)
# draw a simple pie chart (calculated by scene)
elif typ == XChartScene.Type.Pie:
painter.setRenderHint(painter.Antialiasing)
center = self.pieCenter()
radius = self.radius()
for key, value, sub_path in self._subpaths:
clr = self.keyColor(key)
gradient = QRadialGradient(QPointF(0, 0), radius)
a = QColor(clr.lighter(140))
b = QColor(clr.lighter(110))
a.setAlpha(40)
b.setAlpha(80)
# look for mouse over
if ( sub_path == self._hoveredPath ):
a.setAlpha(100)
b.setAlpha(200)
gradient.setColorAt(0, a)
gradient.setColorAt(1, b)
pen = QPen(clr)
pen.setWidth(1)
painter.setBrush(gradient)
painter.setPen(pen)
painter.drawPath(sub_path)