forked from M-Labs/artiq
scanwidget: apply changes as of 98f0a56
This commit is contained in:
parent
bc9203457e
commit
e4b854b8bf
@ -155,6 +155,7 @@ class _RangeScan(LayoutWidget):
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spinbox.setSuffix(" " + procdesc["unit"])
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self.scanner = scanner = ScanWidget()
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scanner.setMinimumSize(150, 0)
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scanner.setSizePolicy(QtWidgets.QSizePolicy(
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QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed))
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disable_scroll_wheel(scanner.axis)
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@ -1,7 +1,8 @@
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from PyQt5 import QtGui, QtCore, QtWidgets
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from .ticker import Ticker
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from numpy import linspace
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from .ticker import Ticker
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class ScanAxis(QtWidgets.QWidget):
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sigZoom = QtCore.pyqtSignal(float, int)
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@ -10,7 +11,6 @@ class ScanAxis(QtWidgets.QWidget):
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def __init__(self, zoomFactor):
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QtWidgets.QWidget.__init__(self)
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self.proxy = None
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self.slider = None # Needed for eventFilter
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self.sizePolicy().setControlType(QtWidgets.QSizePolicy.ButtonBox)
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self.ticker = Ticker()
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self.zoomFactor = zoomFactor
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@ -26,26 +26,25 @@ class ScanAxis(QtWidgets.QWidget):
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painter.drawLine(0, 0, self.width(), 0)
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realLeft = self.proxy.pixelToReal(0)
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realRight = self.proxy.pixelToReal(self.width())
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ticks, prefix, labels = self.ticker(realLeft, realRight)
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painter.drawText(0, -25, prefix)
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pen = QtGui.QPen()
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pen.setWidth(2)
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painter.setPen(pen)
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for t, l in zip(ticks, labels):
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t = self.proxy.realToPixel(t)
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textCenter = (len(l)/2.0)*avgCharWidth
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painter.drawLine(t, 5, t, -5)
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painter.drawText(t - textCenter, -10, l)
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painter.drawLine(t, 0, t, -5)
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painter.drawText(t - len(l)/2*avgCharWidth, -10, l)
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painter.save()
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painter.setPen(QtGui.QColor(QtCore.Qt.green))
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sliderStartPixel = self.proxy.realToPixel(self.proxy.realStart)
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sliderStopPixel = self.proxy.realToPixel(self.proxy.realStop)
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pixels = linspace(sliderStartPixel, sliderStopPixel,
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self.proxy.numPoints)
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self.proxy.numPoints)
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for p in pixels:
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p_int = int(p)
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painter.drawLine(p_int, 0, p_int, 5)
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painter.restore()
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painter.drawText(0, -25, prefix)
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ev.accept()
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def wheelEvent(self, ev):
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@ -62,26 +61,24 @@ class ScanAxis(QtWidgets.QWidget):
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# over a tick during a zoom, it should appear as if we are
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# doing zoom relative to the ticks which live in axis
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# pixel-space, not slider pixel-space.
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self.sigZoom.emit(z, ev.x() -
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self.proxy.slider.handleWidth()/2)
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self.sigZoom.emit(
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z, ev.x() - self.proxy.slider.handleWidth()/2)
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self.update()
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ev.accept()
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def eventFilter(self, obj, ev):
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if obj != self.slider:
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if obj is not self.proxy.slider:
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return False
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if ev.type() != QtCore.QEvent.Wheel:
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return False
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self.wheelEvent(ev)
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return True
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# Basic ideas from https://gist.github.com/Riateche/27e36977f7d5ea72cf4f
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class ScanSlider(QtWidgets.QSlider):
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sigStartMoved = QtCore.pyqtSignal(int)
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sigStopMoved = QtCore.pyqtSignal(int)
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noSlider, startSlider, stopSlider = range(3)
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stopStyle = "QSlider::handle {background:red}"
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startStyle = "QSlider::handle {background:blue}"
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def __init__(self):
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QtWidgets.QSlider.__init__(self, QtCore.Qt.Horizontal)
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@ -92,8 +89,6 @@ class ScanSlider(QtWidgets.QSlider):
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self.stopVal = 99 # upper
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self.offset = 0
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self.position = 0
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self.lastPressed = ScanSlider.noSlider
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self.selectedHandle = ScanSlider.startSlider
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self.upperPressed = QtWidgets.QStyle.SC_None
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self.lowerPressed = QtWidgets.QStyle.SC_None
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self.firstMovement = False # State var for handling slider overlap.
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@ -103,63 +98,40 @@ class ScanSlider(QtWidgets.QSlider):
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# set the stylesheets for drawing each slider later. See paintEvent.
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self.dummyStartSlider = QtWidgets.QSlider()
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self.dummyStopSlider = QtWidgets.QSlider()
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self.dummyStartSlider.setStyleSheet(ScanSlider.startStyle)
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self.dummyStopSlider.setStyleSheet(ScanSlider.stopStyle)
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self.dummyStartSlider.setStyleSheet(
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"QSlider::handle {background:blue}")
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self.dummyStopSlider.setStyleSheet(
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"QSlider::handle {background:red}")
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# We basically superimpose two QSliders on top of each other, discarding
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# the state that remains constant between the two when drawing.
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# Everything except the handles remain constant.
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def initHandleStyleOption(self, opt, handle):
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self.initStyleOption(opt)
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if handle == ScanSlider.startSlider:
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if handle == "start":
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opt.sliderPosition = self.startPos
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opt.sliderValue = self.startVal
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elif handle == ScanSlider.stopSlider:
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elif handle == "stop":
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opt.sliderPosition = self.stopPos
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opt.sliderValue = self.stopVal
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else:
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pass # AssertionErrors
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# We get the range of each slider separately.
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def pixelPosToRangeValue(self, pos):
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opt = QtWidgets.QStyleOptionSlider()
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self.initStyleOption(opt)
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gr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt,
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QtWidgets.QStyle.SC_SliderGroove,
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self)
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sr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt,
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QtWidgets.QStyle.SC_SliderHandle,
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self)
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sliderLength = sr.width()
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sliderStart = gr.x()
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# For historical reasons right() returns left()+width() - 1
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# x() is equivalent to left().
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sliderStop = gr.right() - sliderLength + 1
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rangeVal = QtWidgets.QStyle.sliderValueFromPosition(
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self.minimum(), self.maximum(), pos - sliderStart,
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sliderStop - sliderStart, opt.upsideDown)
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self.minimum(), self.maximum(), pos - gr.x(),
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self.effectiveWidth(), opt.upsideDown)
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return rangeVal
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def rangeValueToPixelPos(self, val):
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opt = QtWidgets.QStyleOptionSlider()
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self.initStyleOption(opt)
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gr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt,
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QtWidgets.QStyle.SC_SliderGroove,
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self)
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sr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt,
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QtWidgets.QStyle.SC_SliderHandle,
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self)
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sliderLength = sr.width()
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sliderStart = gr.x()
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sliderStop = gr.right() - sliderLength + 1
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pixel = QtWidgets.QStyle.sliderPositionFromValue(
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self.minimum(), self.maximum(), val, sliderStop - sliderStart,
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self.minimum(), self.maximum(), val, self.effectiveWidth(),
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opt.upsideDown)
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return pixel
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@ -180,28 +152,15 @@ class ScanSlider(QtWidgets.QSlider):
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gr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt,
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QtWidgets.QStyle.SC_SliderGroove,
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self)
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sliderLength = self.handleWidth()
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sliderStart = gr.x()
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sliderStop = gr.right() - sliderLength + 1
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return sliderStop - sliderStart
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# If groove and axis are not aligned (and they should be), we can use
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# this function to calculate the offset between them.
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def grooveX(self):
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opt = QtWidgets.QStyleOptionSlider()
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self.initStyleOption(opt)
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gr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt,
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QtWidgets.QStyle.SC_SliderGroove,
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self)
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return gr.x()
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return gr.width() - self.handleWidth()
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def handleMousePress(self, pos, control, val, handle):
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opt = QtWidgets.QStyleOptionSlider()
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self.initHandleStyleOption(opt, handle)
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startAtEdges = (handle == ScanSlider.startSlider and
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startAtEdges = (handle == "start" and
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(self.startVal == self.minimum() or
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self.startVal == self.maximum()))
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stopAtEdges = (handle == ScanSlider.stopSlider and
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stopAtEdges = (handle == "stop" and
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(self.stopVal == self.minimum() or
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self.stopVal == self.maximum()))
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@ -218,9 +177,7 @@ class ScanSlider(QtWidgets.QSlider):
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if control == QtWidgets.QStyle.SC_SliderHandle:
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# no pick()- slider orientation static
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self.offset = pos.x() - sr.topLeft().x()
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self.lastPressed = handle
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self.setSliderDown(True)
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self.selectedHandle = handle
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# emit
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# Needed?
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@ -239,25 +196,11 @@ class ScanSlider(QtWidgets.QSlider):
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# if action == QtWidgets.QAbstractSlider.SliderSingleStepAdd:
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# if
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def setStartValue(self, val):
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self.setSpan(val, self.stopVal)
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def setStopValue(self, val):
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self.setSpan(self.startVal, val)
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def setSpan(self, lower, upper):
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# TODO: Is bound() necessary? QStyle::sliderPositionFromValue appears
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def setSpan(self, low, high):
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# TODO: Is this necessary? QStyle::sliderPositionFromValue appears
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# to clamp already.
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def bound(min, curr, max):
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if curr < min:
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return min
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elif curr > max:
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return max
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else:
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return curr
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low = bound(self.minimum(), lower, self.maximum())
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high = bound(self.minimum(), upper, self.maximum())
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low = min(max(self.minimum(), low), self.maximum())
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high = min(max(self.minimum(), high), self.maximum())
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if low != self.startVal or high != self.stopVal:
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if low != self.startVal:
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@ -276,7 +219,7 @@ class ScanSlider(QtWidgets.QSlider):
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if self.isSliderDown():
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self.sigStartMoved.emit(self.startPos)
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if self.hasTracking() and not self.blockTracking:
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self.setStartValue(val)
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self.setSpan(self.startPos, self.stopVal)
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def setStopPosition(self, val):
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if val != self.stopPos:
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@ -286,7 +229,7 @@ class ScanSlider(QtWidgets.QSlider):
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if self.isSliderDown():
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self.sigStopMoved.emit(self.stopPos)
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if self.hasTracking() and not self.blockTracking:
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self.setStopValue(val)
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self.setSpan(self.startVal, self.stopPos)
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def mousePressEvent(self, ev):
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if self.minimum() == self.maximum() or (ev.buttons() ^ ev.button()):
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@ -295,11 +238,10 @@ class ScanSlider(QtWidgets.QSlider):
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# Prefer stopVal in the default case.
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self.upperPressed = self.handleMousePress(
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ev.pos(), self.upperPressed, self.stopVal, ScanSlider.stopSlider)
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ev.pos(), self.upperPressed, self.stopVal, "stop")
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if self.upperPressed != QtWidgets.QStyle.SC_SliderHandle:
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self.lowerPressed = self.handleMousePress(
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ev.pos(), self.upperPressed, self.startVal,
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ScanSlider.startSlider)
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ev.pos(), self.upperPressed, self.startVal, "start")
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# State that is needed to handle the case where two sliders are equal.
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self.firstMovement = True
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@ -350,7 +292,6 @@ class ScanSlider(QtWidgets.QSlider):
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def paintEvent(self, ev):
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# Use QStylePainters to make redrawing as painless as possible.
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painter = QtWidgets.QStylePainter(self)
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# Paint on the custom widget, using the attributes of the fake
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# slider references we keep around. setStyleSheet within paintEvent
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# leads to heavy performance penalties (and recursion?).
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@ -361,22 +302,14 @@ class ScanSlider(QtWidgets.QSlider):
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startPainter = QtWidgets.QStylePainter(self, self.dummyStartSlider)
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stopPainter = QtWidgets.QStylePainter(self, self.dummyStopSlider)
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# Groove
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opt = QtWidgets.QStyleOptionSlider()
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self.initStyleOption(opt)
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opt.sliderValue = 0
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opt.sliderPosition = 0
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opt.subControls = QtWidgets.QStyle.SC_SliderGroove
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painter.drawComplexControl(QtWidgets.QStyle.CC_Slider, opt)
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# Handles
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# Qt will snap sliders to 0 or maximum() if given a desired pixel
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# location outside the mapped range. So we manually just don't draw
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# the handles if they are at 0 or max.
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if self.startVal > 0 and self.startVal < self.maximum():
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self.drawHandle(startPainter, ScanSlider.startSlider)
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self.drawHandle(startPainter, "start")
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if self.stopVal > 0 and self.stopVal < self.maximum():
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self.drawHandle(stopPainter, ScanSlider.stopSlider)
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self.drawHandle(stopPainter, "stop")
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# real (Sliders) => pixel (one pixel movement of sliders would increment by X)
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@ -386,7 +319,7 @@ class ScanProxy(QtCore.QObject):
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sigStopMoved = QtCore.pyqtSignal(float)
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sigNumPoints = QtCore.pyqtSignal(int)
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def __init__(self, slider, axis, rangeFactor):
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def __init__(self, slider, axis, rangeFactor, dynamicRange):
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QtCore.QObject.__init__(self)
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self.axis = axis
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self.slider = slider
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@ -394,6 +327,7 @@ class ScanProxy(QtCore.QObject):
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self.realStop = 0
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self.numPoints = 10
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self.rangeFactor = rangeFactor
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self.dynamicRange = dynamicRange
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# Transform that maps the spinboxes to a pixel position on the
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# axis. 0 to axis.width() exclusive indicate positions which will be
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@ -401,42 +335,23 @@ class ScanProxy(QtCore.QObject):
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# Because the axis's width will change when placed within a layout,
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# the realToPixelTransform will initially be invalid. It will be set
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# properly during the first resizeEvent, with the below transform.
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self.realToPixelTransform = self.calculateNewRealToPixel(
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-self.axis.width()/2, 1.0)
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self.realToPixelTransform = self.axis.width()/2, 1.
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self.invalidOldSizeExpected = True
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# What real value should map to the axis/slider left? This doesn't depend
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# on any public members so we can make decisions about centering during
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# resize and zoom events.
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def calculateNewRealToPixel(self, targetLeft, targetScale):
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return QtGui.QTransform.fromScale(targetScale, 1).translate(
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-targetLeft, 0)
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# pixel vals for sliders: 0 to slider_width - 1
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def realToPixel(self, val):
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rawVal = (QtCore.QPointF(val, 0) * self.realToPixelTransform).x()
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a, b = self.realToPixelTransform
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rawVal = b*(val + a)
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# Clamp pixel values to 32 bits, b/c Qt will otherwise wrap values.
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if rawVal < -(2**31):
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rawVal = -(2**31)
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elif rawVal > (2**31 - 1):
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rawVal = (2**31 - 1)
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rawVal = min(max(-(1 << 31), rawVal), (1 << 31) - 1)
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return rawVal
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# Get a point from pixel units to what the sliders display.
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def pixelToReal(self, val):
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(revXform, invertible) = self.realToPixelTransform.inverted()
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if not invertible:
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revXform = (QtGui.QTransform.fromTranslate(
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-self.realToPixelTransform.dx(), 0) *
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QtGui.QTransform.fromScale(
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1/self.realToPixelTransform.m11(), 0))
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realPoint = QtCore.QPointF(val, 0) * revXform
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return realPoint.x()
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a, b = self.realToPixelTransform
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return val/b - a
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def rangeToReal(self, val):
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# gx = self.slider.grooveX()
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# ax = self.axis.x()
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# assert gx == ax, "gx: {}, ax: {}".format(gx, ax)
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pixelVal = self.slider.rangeValueToPixelPos(val)
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return self.pixelToReal(pixelVal)
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@ -470,11 +385,12 @@ class ScanProxy(QtCore.QObject):
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self.axis.update()
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def handleZoom(self, zoomFactor, mouseXPos):
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newScale = self.realToPixelTransform.m11() * zoomFactor
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newScale = self.realToPixelTransform[1] * zoomFactor
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refReal = self.pixelToReal(mouseXPos)
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newLeft = refReal - mouseXPos/newScale
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self.realToPixelTransform = self.calculateNewRealToPixel(
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newLeft, newScale)
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newLeft = mouseXPos/newScale - refReal
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if abs(newLeft*newScale) > self.dynamicRange:
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return
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self.realToPixelTransform = newLeft, newScale
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self.moveStop(self.realStop)
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self.moveStart(self.realStart)
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@ -485,21 +401,41 @@ class ScanProxy(QtCore.QObject):
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refSlider = self.realStop
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else:
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refSlider = self.realStart
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if self.rangeFactor <= 2:
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return # Ill-formed snap range- do nothing.
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if self.rangeFactor <= 2 or currRangeReal == 0:
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return # Ill-formed snap range- do nothing
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proportion = self.rangeFactor/(self.rangeFactor - 2)
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newScale = self.slider.effectiveWidth()/(proportion*currRangeReal)
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newLeft = refSlider - self.slider.effectiveWidth() \
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/ (self.rangeFactor*newScale)
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self.realToPixelTransform = self.calculateNewRealToPixel(
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newLeft, newScale)
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self.printTransform()
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newLeft = (self.slider.effectiveWidth()/(self.rangeFactor*newScale) -
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refSlider)
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self.realToPixelTransform = newLeft, newScale
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self.moveStop(self.realStop)
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self.moveStart(self.realStart)
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self.axis.update() # Axis normally takes care to update itself during
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# zoom. In this code path however, the zoom didn't arrive via the axis
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# widget, so we need to notify manually.
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# This function is called if the axis width, slider width, and slider
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# positions are in an inconsistent state, to initialize the widget.
|
||||
# This function handles handles the slider positions. Slider and axis
|
||||
# handle its own width changes; proxy watches for axis width resizeEvent to
|
||||
# alter mapping from real to pixel space.
|
||||
def zoomToFitInit(self):
|
||||
currRangeReal = abs(self.realStop - self.realStart)
|
||||
if self.rangeFactor <= 2 or currRangeReal == 0:
|
||||
self.moveStop(self.realStop)
|
||||
self.moveStart(self.realStart)
|
||||
# Ill-formed snap range- move the sliders anyway,
|
||||
# because we arrived here during widget
|
||||
# initialization, where the slider positions are likely invalid.
|
||||
# This will force the sliders to have positions on the axis
|
||||
# which reflect the start/stop values currently set.
|
||||
else:
|
||||
self.zoomToFit()
|
||||
# Notify spinboxes manually, since slider wasn't clicked and will
|
||||
# therefore not emit signals.
|
||||
self.sigStopMoved.emit(self.realStop)
|
||||
self.sigStartMoved.emit(self.realStart)
|
||||
|
||||
def fitToView(self):
|
||||
lowRange = 1.0/self.rangeFactor
|
||||
highRange = (self.rangeFactor - 1)/self.rangeFactor
|
||||
@ -527,15 +463,22 @@ class ScanProxy(QtCore.QObject):
|
||||
newWidth = ev.size().width() - self.slider.handleWidth()
|
||||
# assert refRight > oldLeft
|
||||
newScale = newWidth/(refRight - oldLeft)
|
||||
self.realToPixelTransform = -oldLeft, newScale
|
||||
else:
|
||||
# TODO: self.axis.width() is invalid during object
|
||||
# construction. The width will change when placed in a
|
||||
# layout WITHOUT a resizeEvent. Why?
|
||||
oldLeft = -ev.size().width()/2
|
||||
newScale = 1.0
|
||||
self.realToPixelTransform = -oldLeft, newScale
|
||||
# We need to reinitialize the pixel transform b/c the old width
|
||||
# of the axis is no longer valid. When we have a valid transform,
|
||||
# we can then zoomToFit based on the desired real values.
|
||||
# The slider handle values are invalid before this point as well;
|
||||
# we set them to the correct value here, regardless of whether
|
||||
# the slider has already resized itsef or not.
|
||||
self.zoomToFitInit()
|
||||
self.invalidOldSizeExpected = False
|
||||
self.realToPixelTransform = self.calculateNewRealToPixel(
|
||||
oldLeft, newScale)
|
||||
# assert self.pixelToReal(0) == oldLeft, \
|
||||
# "{}, {}".format(self.pixelToReal(0), oldLeft)
|
||||
# Slider will update independently, making sure that the old
|
||||
@ -544,26 +487,17 @@ class ScanProxy(QtCore.QObject):
|
||||
# same positions in the new axis-space.
|
||||
return False
|
||||
|
||||
def printTransform(self):
|
||||
print("m11: {}, dx: {}".format(
|
||||
self.realToPixelTransform.m11(), self.realToPixelTransform.dx()))
|
||||
(inverted, invertible) = self.realToPixelTransform.inverted()
|
||||
print("m11: {}, dx: {}, singular: {}".format(
|
||||
inverted.m11(), inverted.dx(), not invertible))
|
||||
|
||||
|
||||
class ScanWidget(QtWidgets.QWidget):
|
||||
sigStartMoved = QtCore.pyqtSignal(float)
|
||||
sigStopMoved = QtCore.pyqtSignal(float)
|
||||
sigNumChanged = QtCore.pyqtSignal(int)
|
||||
|
||||
def __init__(self, zoomFactor=1.05, rangeFactor=6):
|
||||
def __init__(self, zoomFactor=1.05, rangeFactor=6, dynamicRange=1e8):
|
||||
QtWidgets.QWidget.__init__(self)
|
||||
self.slider = slider = ScanSlider()
|
||||
self.axis = axis = ScanAxis(zoomFactor)
|
||||
zoomFitButton = QtWidgets.QPushButton("View Range")
|
||||
fitViewButton = QtWidgets.QPushButton("Snap Range")
|
||||
self.proxy = ScanProxy(slider, axis, rangeFactor)
|
||||
self.proxy = ScanProxy(slider, axis, rangeFactor, dynamicRange)
|
||||
axis.proxy = self.proxy
|
||||
axis.slider = slider
|
||||
slider.setMaximum(1023)
|
||||
@ -574,11 +508,9 @@ class ScanWidget(QtWidgets.QWidget):
|
||||
layout.setRowMinimumHeight(0, 40)
|
||||
layout.addWidget(axis, 0, 0, 1, -1)
|
||||
layout.addWidget(slider, 1, 0, 1, -1)
|
||||
layout.addWidget(zoomFitButton, 2, 0)
|
||||
layout.addWidget(fitViewButton, 2, 1)
|
||||
self.setLayout(layout)
|
||||
|
||||
# Connect signals
|
||||
# Connect signals (minus context menu)
|
||||
slider.sigStopMoved.connect(self.proxy.handleStopMoved)
|
||||
slider.sigStartMoved.connect(self.proxy.handleStartMoved)
|
||||
self.proxy.sigStopMoved.connect(self.sigStopMoved)
|
||||
@ -586,13 +518,17 @@ class ScanWidget(QtWidgets.QWidget):
|
||||
self.proxy.sigNumPoints.connect(self.sigNumChanged)
|
||||
axis.sigZoom.connect(self.proxy.handleZoom)
|
||||
axis.sigPoints.connect(self.proxy.handleNumPoints)
|
||||
fitViewButton.clicked.connect(self.fitToView)
|
||||
zoomFitButton.clicked.connect(self.zoomToFit)
|
||||
|
||||
# Connect event observers.
|
||||
axis.installEventFilter(self.proxy)
|
||||
slider.installEventFilter(axis)
|
||||
|
||||
# Context menu entries
|
||||
self.zoomToFitAct = QtWidgets.QAction("&View Range", self)
|
||||
self.fitToViewAct = QtWidgets.QAction("&Snap Range", self)
|
||||
self.zoomToFitAct.triggered.connect(self.zoomToFit)
|
||||
self.fitToViewAct.triggered.connect(self.fitToView)
|
||||
|
||||
# Spinbox and button slots. Any time the spinboxes change, ScanWidget
|
||||
# mirrors it and passes the information to the proxy.
|
||||
def setStop(self, val):
|
||||
@ -610,5 +546,8 @@ class ScanWidget(QtWidgets.QWidget):
|
||||
def fitToView(self):
|
||||
self.proxy.fitToView()
|
||||
|
||||
def reset(self):
|
||||
self.proxy.reset()
|
||||
def contextMenuEvent(self, ev):
|
||||
menu = QtWidgets.QMenu(self)
|
||||
menu.addAction(self.zoomToFitAct)
|
||||
menu.addAction(self.fitToViewAct)
|
||||
menu.exec(ev.globalPos())
|
||||
|
||||
Loading…
Reference in New Issue
Block a user