def __init__(self):
super(HistogramWidget, self).__init__()
self.setFrameShadow(QFrame.Plain)
self.setFrameShape(QFrame.NoFrame)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setRenderHint(QPainter.Antialiasing)
self._leftAxeMode = HistogramWidget.AxeClear
self._bottomAxeMode = HistogramWidget.AxeClear
self._histogram = None
self._margin = QMargins(0, 0, 0, 0)
self._backgroundItem = BackgroundItem()
self._gridItem = GridItem()
self._histogramItem = HistogramItem()
self._items = [
self._backgroundItem, self._gridItem, self._histogramItem
]
zValue = 0
self._scene = QGraphicsScene(self)
for item in self._items:
self._scene.addItem(item)
item.setZValue(zValue)
zValue += 100
self.setScene(self._scene)
def __init__(self): super(HistogramWidget, self).__init__() self.setFrameShadow(QFrame.Plain) self.setFrameShape(QFrame.NoFrame) self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) self.setRenderHint(QPainter.Antialiasing) self._leftAxeMode = HistogramWidget.AxeClear self._bottomAxeMode = HistogramWidget.AxeClear self._histogram = None self._margin = QMargins(0, 0, 0, 0) self._backgroundItem = BackgroundItem() self._gridItem = GridItem() self._histogramItem = HistogramItem() self._items = [self._backgroundItem, self._gridItem, self._histogramItem] zValue = 0 self._scene = QGraphicsScene(self) for item in self._items: self._scene.addItem(item) item.setZValue(zValue) zValue += 100 self.setScene(self._scene)
class HistogramWidget(QGraphicsView):
"""
HistogramWidget
"""
AxeClear = "HAC"
AxeNormal = "HAD"
AxePercentage = "HAP"
AxeLog = "HAL"
def __init__(self):
super(HistogramWidget, self).__init__()
self.setFrameShadow(QFrame.Plain)
self.setFrameShape(QFrame.NoFrame)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setRenderHint(QPainter.Antialiasing)
self._leftAxeMode = HistogramWidget.AxeClear
self._bottomAxeMode = HistogramWidget.AxeClear
self._histogram = None
self._margin = QMargins(0, 0, 0, 0)
self._backgroundItem = BackgroundItem()
self._gridItem = GridItem()
self._histogramItem = HistogramItem()
self._items = [
self._backgroundItem, self._gridItem, self._histogramItem
]
zValue = 0
self._scene = QGraphicsScene(self)
for item in self._items:
self._scene.addItem(item)
item.setZValue(zValue)
zValue += 100
self.setScene(self._scene)
def setAxeMode(self, left=None, bottom=None):
if left:
self._leftAxeMode = left
if self._leftAxeMode == self.AxeLog:
self._histogramItem.functionType = HistogramItem.TypeLog
else:
self._histogramItem.functionType = HistogramItem.TypeNormal
self._histogramItem.update()
if bottom:
self._bottomAxeMode = bottom
self._updateAxis()
self.updateScene()
def setHistogram(self, histogram):
self._histogram = histogram
self._histogramItem.setHistogram(histogram)
self._updateAxis()
def addItem(self, item):
self._scene.addItem(item)
self._items.append(item)
self.update()
def resizeEvent(self, resizeEv):
"""
Overrides QGraphicsView.resizeEvent()
"""
super(HistogramWidget, self).resizeEvent(resizeEv)
self.updateScene()
def wheelEvent(self, wheelEv):
"""
Overrides QGraphicsView.wheelEvent()
Make sure nothing happens when the user scrolls over this widget.
"""
wheelEv.ignore()
@Slot()
def updateScene(self):
"""
The QGraphicsScene.changed() will automatically be linked to
this slot. If this slot is missing, then PySide will crash on
close where it is unable to disconnect this slot...
Overrides QGraphicsView.updateScene()
"""
self.update()
def update(self):
"""
Overrides QGraphicsView.update()
"""
rect = self.rect()
if len(self._gridItem._itemsLeft) > 0 and len(
self._gridItem._itemsBottom) > 0:
# left, top, right, bottom
self._margin = QMargins(30, 9, 9, 30)
elif len(self._gridItem._itemsLeft) > 0:
self._margin = QMargins(30, 9, 9, 9)
elif len(self._gridItem._itemsBottom) > 0:
self._margin = QMargins(9, 9, 9, 30)
else:
self._margin = QMargins(9, 9, 9, 9)
for item in self._items:
item.setRect(rect)
if hasattr(item, "setMargins"):
item.setMargins(self._margin)
self._histogramItem.update()
def _updateAxis(self):
leftAxis = []
bottomAxis = []
if self._leftAxeMode is HistogramWidget.AxeClear:
pass
elif self._leftAxeMode is HistogramWidget.AxeNormal:
if self._histogramItem.functionType == HistogramItem.TypeLog:
positions = []
maxY = self._histogramItem.func(self._histogram.maxY)
lala = int(round(maxY) + 1)
for i in range(lala):
positions.append(float(i / float(maxY)))
val = self._histogramItem.invfunc(i)
text = "%.0f" % val
leftAxis.append(text)
self._gridItem.setLeftGridPositions(positions)
else:
minY = self._histogram.minY
maxY = self._histogram.maxY
rangeY = maxY - minY
markerCount = 11
chunk = rangeY / float(markerCount - 1)
for i in range(markerCount):
val = minY + i * chunk
text = "%.1f" % val
leftAxis.append(text)
elif self._leftAxeMode is HistogramWidget.AxePercentage:
for i in range(11):
leftAxis.append(str(i * 10) + "%")
if self._bottomAxeMode is HistogramWidget.AxeClear:
pass
elif self._bottomAxeMode is HistogramWidget.AxeNormal:
rangeX = self._histogram.maxX - self._histogram.minX
binCount = len(self._histogram.bins)
markerCount = min(binCount, 11)
chunk = rangeX / (markerCount - 1)
for i in range(binCount):
if i % chunk == 0 or i == binCount - 1:
bottomAxis.append(str(int(self._histogram.minX + i)))
else:
bottomAxis.append("")
elif self._bottomAxeMode is HistogramWidget.AxePercentage:
pass
self._gridItem.setLeftGridItems(leftAxis)
self._gridItem.setBottomGridItems(bottomAxis)
class HistogramWidget(QGraphicsView):
"""
HistogramWidget
"""
AxeClear = "HAC"
AxeNormal = "HAD"
AxePercentage = "HAP"
AxeLog = "HAL"
def __init__(self):
super(HistogramWidget, self).__init__()
self.setFrameShadow(QFrame.Plain)
self.setFrameShape(QFrame.NoFrame)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setRenderHint(QPainter.Antialiasing)
self._leftAxeMode = HistogramWidget.AxeClear
self._bottomAxeMode = HistogramWidget.AxeClear
self._histogram = None
self._margin = QMargins(0, 0, 0, 0)
self._backgroundItem = BackgroundItem()
self._gridItem = GridItem()
self._histogramItem = HistogramItem()
self._items = [self._backgroundItem, self._gridItem, self._histogramItem]
zValue = 0
self._scene = QGraphicsScene(self)
for item in self._items:
self._scene.addItem(item)
item.setZValue(zValue)
zValue += 100
self.setScene(self._scene)
def setAxeMode(self, left=None, bottom=None):
if left:
self._leftAxeMode = left
if self._leftAxeMode == self.AxeLog:
self._histogramItem.functionType = HistogramItem.TypeLog
else:
self._histogramItem.functionType = HistogramItem.TypeNormal
self._histogramItem.update()
if bottom:
self._bottomAxeMode = bottom
self._updateAxis()
self.updateScene()
def setHistogram(self, histogram):
self._histogram = histogram
self._histogramItem.setHistogram(histogram)
self._updateAxis()
def addItem(self, item):
self._scene.addItem(item)
self._items.append(item)
self.update()
def resizeEvent(self, resizeEv):
"""
Overrides QGraphicsView.resizeEvent()
"""
super(HistogramWidget, self).resizeEvent(resizeEv)
self.updateScene()
def wheelEvent(self, wheelEv):
"""
Overrides QGraphicsView.wheelEvent()
Make sure nothing happens when the user scrolls over this widget.
"""
pass
@Slot()
def updateScene(self):
"""
The QGraphicsScene.changed() will automatically be linked to
this slot. If this slot is missing, then PySide will crash on
close where it is unable to disconnect this slot...
Overrides QGraphicsView.updateScene()
"""
self.update()
def update(self):
"""
Overrides QGraphicsView.update()
"""
rect = self.rect()
if len(self._gridItem._itemsLeft) > 0 and len(self._gridItem._itemsBottom) > 0:
# left, top, right, bottom
self._margin = QMargins(30, 9, 9, 30)
elif len(self._gridItem._itemsLeft) > 0:
self._margin = QMargins(30, 9, 9, 9)
elif len(self._gridItem._itemsBottom) > 0:
self._margin = QMargins(9, 9, 9, 30)
else:
self._margin = QMargins(9, 9, 9, 9)
for item in self._items:
item.setRect(rect)
if hasattr(item, "setMargins"):
item.setMargins(self._margin)
self._histogramItem.update()
def _updateAxis(self):
leftAxis = []
bottomAxis = []
if self._leftAxeMode is HistogramWidget.AxeClear:
pass
elif self._leftAxeMode is HistogramWidget.AxeNormal:
if self._histogramItem.functionType == HistogramItem.TypeLog:
positions = []
maxY = self._histogramItem.func(self._histogram.maxY)
lala = int(round(maxY)+1)
for i in range(lala):
positions.append(float(i / float(maxY)))
val = self._histogramItem.invfunc(i)
text = "%.0f" % val
leftAxis.append(text)
self._gridItem.setLeftGridPositions(positions)
else:
minY = self._histogram.minY
maxY = self._histogram.maxY
rangeY = maxY - minY
markerCount = 11
chunk = rangeY / float(markerCount - 1)
for i in range(markerCount):
val = minY + i * chunk
text = "%.1f" % val
leftAxis.append(text)
elif self._leftAxeMode is HistogramWidget.AxePercentage:
for i in range(11):
leftAxis.append(str(i * 10) + "%")
if self._bottomAxeMode is HistogramWidget.AxeClear:
pass
elif self._bottomAxeMode is HistogramWidget.AxeNormal:
rangeX = self._histogram.maxX - self._histogram.minX
binCount = len(self._histogram.bins)
markerCount = min(binCount, 11)
chunk = rangeX / (markerCount - 1)
for i in range(binCount):
if i % chunk == 0 or i == binCount-1:
bottomAxis.append(str(int(self._histogram.minX + i)))
else:
bottomAxis.append("")
elif self._bottomAxeMode is HistogramWidget.AxePercentage:
pass
self._gridItem.setLeftGridItems(leftAxis)
self._gridItem.setBottomGridItems(bottomAxis)
