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scanwidget: changes as of edaba53
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@ -288,16 +288,33 @@ class ScanSlider(QtWidgets.QSlider):
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# real (Sliders) => pixel (one pixel movement of sliders would increment by X)
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# => range (minimum granularity that sliders understand).
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class ScanProxy(QtCore.QObject):
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class ScanWidget(QtWidgets.QWidget):
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sigStartMoved = QtCore.pyqtSignal(float)
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sigStopMoved = QtCore.pyqtSignal(float)
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sigNumChanged = QtCore.pyqtSignal(int)
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def __init__(self, slider, axis, zoomMargin, dynamicRange, zoomFactor):
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QtCore.QObject.__init__(self)
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self.axis = axis
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def __init__(self, zoomFactor=1.05, zoomMargin=.1, dynamicRange=1e9):
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QtWidgets.QWidget.__init__(self)
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self.slider = slider = ScanSlider()
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self.axis = axis = ScanAxis()
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axis.proxy = self
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self.slider = slider
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# Layout.
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layout = QtWidgets.QVBoxLayout()
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layout.setSpacing(0)
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layout.addWidget(axis)
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layout.addWidget(slider)
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self.setLayout(layout)
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# Context menu entries
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self.menu = QtWidgets.QMenu(self)
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viewRangeAct = QtWidgets.QAction("&View Range", self)
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viewRangeAct.triggered.connect(self.viewRange)
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self.menu.addAction(viewRangeAct)
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snapRangeAct = QtWidgets.QAction("&Snap Range", self)
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snapRangeAct.triggered.connect(self.snapRange)
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self.menu.addAction(snapRangeAct)
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self.realStart = -1.
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self.realStop = 1.
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self.numPoints = 11
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@ -320,6 +337,9 @@ class ScanProxy(QtCore.QObject):
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slider.sigStopMoved.connect(self.handleStopMoved)
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slider.sigStartMoved.connect(self.handleStartMoved)
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def contextMenuEvent(self, ev):
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self.menu.popup(ev.globalPos())
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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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a, b = self.realToPixelTransform
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@ -341,32 +361,32 @@ class ScanProxy(QtCore.QObject):
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pixelVal = self.realToPixel(val)
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return self.slider.pixelPosToRangeValue(pixelVal)
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def moveStop(self, val):
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def setStop(self, val):
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sliderX = self.realToRange(val)
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self.slider.setStopPosition(sliderX)
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self.realStop = val
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self.axis.update() # Number of points ticks changed positions.
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def moveStart(self, val):
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def setStart(self, val):
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sliderX = self.realToRange(val)
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self.slider.setStartPosition(sliderX)
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self.realStart = val
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self.axis.update()
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def setNumPoints(self, val):
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self.numPoints = val
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self.axis.update()
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def handleStopMoved(self, rangeVal):
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# FIXME: this relies on the event being fed back and ending up calling
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# moveStop()
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# setStop()
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self.sigStopMoved.emit(self.rangeToReal(rangeVal))
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def handleStartMoved(self, rangeVal):
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# FIXME: this relies on the event being fed back and ending up calling
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# moveStart()
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# setStart()
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self.sigStartMoved.emit(self.rangeToReal(rangeVal))
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def setNumPoints(self, val):
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self.numPoints = val
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self.axis.update()
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def handleZoom(self, zoomFactor, mouseXPos):
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newScale = self.realToPixelTransform[1] * zoomFactor
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refReal = self.pixelToReal(mouseXPos)
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@ -375,8 +395,8 @@ class ScanProxy(QtCore.QObject):
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if zoomFactor > 1 and abs(newZero) > 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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self.setStop(self.realStop)
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self.setStart(self.realStart)
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def viewRange(self):
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newScale = self.slider.effectiveWidth()/abs(
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@ -387,8 +407,8 @@ class ScanProxy(QtCore.QObject):
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newScale = min(newScale, self.dynamicRange/abs(newCenter))
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newLeft = newCenter - self.slider.effectiveWidth()/2/newScale
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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.setStop(self.realStop)
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self.setStart(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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@ -401,8 +421,8 @@ class ScanProxy(QtCore.QObject):
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def viewRangeInit(self):
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currRangeReal = abs(self.realStop - self.realStart)
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if currRangeReal == 0:
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self.moveStop(self.realStop)
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self.moveStart(self.realStart)
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self.setStop(self.realStop)
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self.setStart(self.realStart)
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# Ill-formed snap range- move the sliders anyway,
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# because we arrived here during widget
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# initialization, where the slider positions are likely invalid.
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@ -426,7 +446,7 @@ class ScanProxy(QtCore.QObject):
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# consequence of ValueChanged signal in spinboxes. The slider widget
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# has guards against recursive signals in setSpan().
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# FIXME: this relies on the events being fed back and ending up
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# calling moveStart() and moveStop()
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# calling setStart() and setStop()
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self.sigStopMoved.emit(newStop)
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self.sigStartMoved.emit(newStart)
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@ -444,7 +464,8 @@ class ScanProxy(QtCore.QObject):
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# calling setNumPoints()
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self.sigNumChanged.emit(self.numPoints + z)
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self.axis.update()
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else:
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ev.accept()
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elif ev.modifiers() & QtCore.Qt.ControlModifier:
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z = self.zoomFactor**(y / 120.)
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# Remove the slider-handle shift correction, b/c none of the
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# other widgets know about it. If we have the mouse directly
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@ -452,7 +473,9 @@ class ScanProxy(QtCore.QObject):
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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.handleZoom(z, ev.x() - self.slider.handleWidth()/2)
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ev.accept()
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ev.accept()
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else:
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ev.ignore()
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def eventFilter(self, obj, ev):
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if ev.type() == QtCore.QEvent.Wheel:
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@ -490,55 +513,3 @@ class ScanProxy(QtCore.QObject):
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# confident that the new slider position will still map to the
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# same positions in the new axis-space.
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return False
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class ScanWidget(QtWidgets.QWidget):
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sigStartMoved = QtCore.pyqtSignal(float)
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sigStopMoved = QtCore.pyqtSignal(float)
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sigNumChanged = QtCore.pyqtSignal(int)
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def __init__(self, zoomFactor=1.05, zoomMargin=.1, dynamicRange=1e9):
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QtWidgets.QWidget.__init__(self)
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self.slider = slider = ScanSlider()
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self.axis = axis = ScanAxis()
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self.proxy = ScanProxy(slider, axis, zoomMargin, dynamicRange,
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zoomFactor)
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# Layout.
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layout = QtWidgets.QVBoxLayout()
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layout.setSpacing(0)
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layout.addWidget(axis)
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layout.addWidget(slider)
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self.setLayout(layout)
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# Connect signals (minus context menu)
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self.proxy.sigStopMoved.connect(self.sigStopMoved)
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self.proxy.sigStartMoved.connect(self.sigStartMoved)
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self.proxy.sigNumChanged.connect(self.sigNumChanged)
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# Context menu entries
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self.menu = QtWidgets.QMenu(self)
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viewRangeAct = QtWidgets.QAction("&View Range", self)
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viewRangeAct.triggered.connect(self.viewRange)
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self.menu.addAction(viewRangeAct)
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snapRangeAct = QtWidgets.QAction("&Snap Range", self)
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snapRangeAct.triggered.connect(self.snapRange)
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self.menu.addAction(snapRangeAct)
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def setStop(self, val):
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self.proxy.moveStop(val)
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def setStart(self, val):
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self.proxy.moveStart(val)
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def setNumPoints(self, val):
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self.proxy.setNumPoints(val)
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def viewRange(self):
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self.proxy.viewRange()
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def snapRange(self):
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self.proxy.snapRange()
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def contextMenuEvent(self, ev):
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self.menu.popup(ev.globalPos())
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