forked from M-Labs/artiq
scanwidget: rewrite, pending drawing area (3de1505)
This commit is contained in:
parent
0e1f75ec49
commit
d858ad4180
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@ -158,8 +158,6 @@ class _RangeScan(LayoutWidget):
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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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disable_scroll_wheel(scanner.slider)
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self.addWidget(scanner, 0, 0, -1, 1)
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self.min = ScientificSpinBox()
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@ -191,17 +189,17 @@ class _RangeScan(LayoutWidget):
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def update_npoints(value):
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state["npoints"] = value
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scanner.setNumPoints(value)
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scanner.setNum(value)
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scanner.sigStartMoved.connect(self.min.setValue)
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scanner.sigNumChanged.connect(self.npoints.setValue)
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scanner.sigStopMoved.connect(self.max.setValue)
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scanner.startChanged.connect(self.min.setValue)
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scanner.numChanged.connect(self.npoints.setValue)
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scanner.stopChanged.connect(self.max.setValue)
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self.min.valueChanged.connect(update_min)
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self.npoints.valueChanged.connect(update_npoints)
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self.max.valueChanged.connect(update_max)
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self.min.setValue(state["min"]/scale)
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self.npoints.setValue(state["npoints"])
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self.max.setValue(state["max"]/scale)
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scanner.setStart(state["min"]/scale)
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scanner.setNum(state["npoints"])
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scanner.setStop(state["max"]/scale)
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apply_properties(self.min)
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apply_properties(self.max)
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@ -1,7 +1,7 @@
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import logging
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from PyQt5 import QtGui, QtCore, QtWidgets
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from numpy import linspace
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import numpy as np
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from .ticker import Ticker
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@ -9,119 +9,111 @@ from .ticker import Ticker
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logger = logging.getLogger(__name__)
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class ScanAxis(QtWidgets.QWidget):
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def __init__(self):
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QtWidgets.QWidget.__init__(self)
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self.proxy = None
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self.sizePolicy().setControlType(QtWidgets.QSizePolicy.ButtonBox)
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self.ticker = Ticker()
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qfm = QtGui.QFontMetrics(QtGui.QFont())
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lineSpacing = qfm.lineSpacing()
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descent = qfm.descent()
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self.setMinimumHeight(2*lineSpacing + descent + 5 + 5)
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class ScanWidget(QtWidgets.QSlider):
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startChanged = QtCore.pyqtSignal(float)
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stopChanged = QtCore.pyqtSignal(float)
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numChanged = QtCore.pyqtSignal(int)
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def paintEvent(self, ev):
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painter = QtGui.QPainter(self)
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qfm = QtGui.QFontMetrics(painter.font())
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avgCharWidth = qfm.averageCharWidth()
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lineSpacing = qfm.lineSpacing()
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descent = qfm.descent()
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painter.setRenderHint(QtGui.QPainter.Antialiasing)
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# The center of the slider handles should reflect what's displayed
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# on the spinboxes.
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painter.translate(self.proxy.slider.handleWidth()/2, self.height() - 5)
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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, -5-descent-lineSpacing, 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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painter.drawLine(t, 0, t, -5)
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painter.drawText(t - len(l)/2*avgCharWidth, -5-descent, l)
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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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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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ev.accept()
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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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def __init__(self):
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def __init__(self, zoomFactor=1.05, zoomMargin=.1, dynamicRange=1e9):
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QtWidgets.QSlider.__init__(self, QtCore.Qt.Horizontal)
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self.startVal = None
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self.stopVal = None
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self.offset = None
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self.position = None
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self.pressed = None
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self.zoomMargin = zoomMargin
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self.dynamicRange = dynamicRange
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self.zoomFactor = zoomFactor
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self.setRange(0, (1 << 15) - 1)
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self.ticker = Ticker()
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# We need fake sliders to keep around so that we can dynamically
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# set the stylesheets for drawing each slider later. See paintEvent.
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# QPalettes would be nicer to use, since palette entries can be set
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# individually for each slider handle, but Windows 7 does not
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# use them. This seems to be the only way to override the colors
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# regardless of platform.
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self.dummyStartSlider = QtWidgets.QSlider()
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self.dummyStopSlider = QtWidgets.QSlider()
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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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self.menu = QtWidgets.QMenu(self)
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action = QtWidgets.QAction("&View Range", self)
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action.triggered.connect(self.viewRange)
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self.menu.addAction(action)
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action = QtWidgets.QAction("&Snap Range", self)
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action.triggered.connect(self.snapRange)
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self.menu.addAction(action)
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def pixelPosToRangeValue(self, pos):
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self._startSlider = QtWidgets.QSlider()
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self._startSlider.setStyleSheet("QSlider::handle {background:blue}")
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self._stopSlider = QtWidgets.QSlider()
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self._stopSlider.setStyleSheet("QSlider::handle {background:red}")
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self.setRange(0, 4095)
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self._start, self._stop, self._num = None, None, None
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self._axisView, self._sliderView = None, None
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self._offset, self._pressed = None, None
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def contextMenuEvent(self, ev):
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self.menu.popup(ev.globalPos())
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def _axisToPixel(self, val):
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a, b = self._axisView
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return a + val*b
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def _pixelToAxis(self, val):
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a, b = self._axisView
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return (val - a)/b
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def _setView(self, axis_left, axis_scale):
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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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g = 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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rangeVal = QtWidgets.QStyle.sliderValueFromPosition(
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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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pixel = QtWidgets.QStyle.sliderPositionFromValue(
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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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# When calculating conversions to/from pixel space, not all of the slider's
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# width is actually usable, because the slider handle has a nonzero width.
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# We use this function as a helper when the axis needs slider information.
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def handleWidth(self):
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opt = QtWidgets.QStyleOptionSlider()
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self.initStyleOption(opt)
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sr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt,
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h = 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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return sr.width()
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slider_left = g.x() + h.width()/2
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slider_scale = (self.maximum() - self.minimum())/(
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g.width() - h.width())
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def effectiveWidth(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.width() - self.handleWidth()
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self._axisView = axis_left, axis_scale
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self._sliderView = ((axis_left - slider_left)*slider_scale,
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axis_scale*slider_scale)
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self.update()
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def setStart(self, val):
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if self._start == val:
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return
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self._start = val
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self.update()
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self.startChanged.emit(val)
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def setStop(self, val):
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if self._stop == val:
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return
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self._stop = val
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self.update()
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self.stopChanged.emit(val)
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def setNum(self, val):
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if self._num == val:
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return
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self._num = val
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self.update()
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self.numChanged.emit(val)
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def viewRange(self):
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center = (self._stop + self._start)/2
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scale = self.width()*(1 - 2*self.zoomMargin)
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if self._stop != self._start:
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scale /= abs(self._stop - self._start)
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if center:
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scale = min(scale, self.dynamicRange/abs(center))
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else:
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scale = self.dynamicRange
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if center:
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scale /= abs(center)
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left = self.width()/2 - center*scale
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self._setView(left, scale)
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def snapRange(self):
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self.setStart(self._pixelToAxis(self.zoomMargin*self.width()))
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self.setStop(self._pixelToAxis((1 - self.zoomMargin)*self.width()))
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def _getStyleOptionSlider(self, val):
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a, b = self._sliderView
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val = a + val*b
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if not (self.minimum() <= val <= self.maximum()):
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return None
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opt = QtWidgets.QStyleOptionSlider()
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self.initStyleOption(opt)
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opt.sliderPosition = val
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@ -130,284 +122,131 @@ class ScanSlider(QtWidgets.QSlider):
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return opt
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def _hitHandle(self, pos, val):
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# If chosen slider at edge, treat it as non-interactive.
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if not (self.minimum() < val < self.maximum()):
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return False
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opt = self._getStyleOptionSlider(val)
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if not opt:
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return False
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control = self.style().hitTestComplexControl(
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QtWidgets.QStyle.CC_Slider, opt, pos, self)
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if control != QtWidgets.QStyle.SC_SliderHandle:
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return False
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sr = self.style().subControlRect(
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QtWidgets.QStyle.CC_Slider, opt,
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QtWidgets.QStyle.SC_SliderHandle, self)
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self.offset = pos.x() - sr.topLeft().x()
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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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self._offset = pos.x() - sr.center().x()
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self.setSliderDown(True)
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# Needed?
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self.update(sr)
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return True
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def setStartPosition(self, val):
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if val == self.startVal:
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return
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self.startVal = val
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self.update()
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def setStopPosition(self, val):
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if val == self.stopVal:
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return
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self.stopVal = val
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self.update()
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def mousePressEvent(self, ev):
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if ev.buttons() ^ ev.button():
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ev.ignore()
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return
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# Prefer stopVal in the default case.
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if self._hitHandle(ev.pos(), self.stopVal):
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self.pressed = "stop"
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elif self._hitHandle(ev.pos(), self.startVal):
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self.pressed = "start"
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if self._hitHandle(ev.pos(), self._stop):
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self._pressed = "stop"
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elif self._hitHandle(ev.pos(), self._start):
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self._pressed = "start"
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else:
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self.pressed = None
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ev.accept()
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self._pressed = None
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def mouseMoveEvent(self, ev):
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if not self.pressed:
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if not self._pressed:
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ev.ignore()
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return
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opt = QtWidgets.QStyleOptionSlider()
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self.initStyleOption(opt)
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# This code seems to be needed so that returning the slider to the
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# previous position is honored if a drag distance is exceeded.
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m = self.style().pixelMetric(QtWidgets.QStyle.PM_MaximumDragDistance,
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opt, self)
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newPos = self.pixelPosToRangeValue(ev.pos().x() - self.offset)
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if m >= 0:
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r = self.rect().adjusted(-m, -m, m, m)
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if not r.contains(ev.pos()):
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newPos = self.position
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if self.pressed == "start":
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self.setStartPosition(newPos)
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val = self._pixelToAxis(ev.pos().x() - self._offset)
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if self._pressed == "stop":
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self._stop = val
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self.update()
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if self.hasTracking():
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self.sigStartMoved.emit(self.startVal)
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elif self.pressed == "stop":
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self.setStopPosition(newPos)
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self.stopChanged.emit(val)
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elif self._pressed == "start":
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self._start = val
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self.update()
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if self.hasTracking():
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self.sigStopMoved.emit(self.stopVal)
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ev.accept()
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self.startChanged.emit(val)
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def mouseReleaseEvent(self, ev):
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QtWidgets.QSlider.mouseReleaseEvent(self, ev)
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self.setSliderDown(False) # AbstractSlider needs this
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if not self.hasTracking():
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if self.pressed == "start":
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self.sigStartMoved.emit(self.startVal)
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elif self.pressed == "stop":
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self.sigStopMoved.emit(self.stopVal)
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self.pressed = None
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self.setSliderDown(False)
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if self._pressed == "start":
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self.startChanged.emit(self._start)
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elif self._pressed == "stop":
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self.stopChanged.emit(self._stop)
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self._pressed = None
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def paintEvent(self, ev):
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# Use the pre-parsed, styled sliders.
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startPainter = QtWidgets.QStylePainter(self, self.dummyStartSlider)
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stopPainter = QtWidgets.QStylePainter(self, self.dummyStopSlider)
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# Only draw handles that are not railed
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if self.minimum() < self.startVal < self.maximum():
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opt = self._getStyleOptionSlider(self.startVal)
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startPainter.drawComplexControl(QtWidgets.QStyle.CC_Slider, opt)
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if self.minimum() < self.stopVal < self.maximum():
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opt = self._getStyleOptionSlider(self.stopVal)
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stopPainter.drawComplexControl(QtWidgets.QStyle.CC_Slider, opt)
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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 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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axis.proxy = self
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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 = None
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self.realStop = None
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self.numPoints = None
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self.zoomMargin = zoomMargin
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self.dynamicRange = dynamicRange
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self.zoomFactor = zoomFactor
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self.realToPixelTransform = -self.axis.width()/2, 1.
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# Connect event observers.
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axis.installEventFilter(self)
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slider.installEventFilter(self)
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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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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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rawVal = min(max(-(1 << 31), rawVal), (1 << 31) - 1)
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return rawVal
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def pixelToReal(self, val):
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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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pixelVal = self.slider.rangeValueToPixelPos(val)
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return self.pixelToReal(pixelVal)
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def realToRange(self, val):
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pixelVal = self.realToPixel(val)
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return self.slider.pixelPosToRangeValue(pixelVal)
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|
||||
def setView(self, left, scale):
|
||||
self.realToPixelTransform = left, scale
|
||||
sliderX = self.realToRange(self.realStop)
|
||||
self.slider.setStopPosition(sliderX)
|
||||
sliderX = self.realToRange(self.realStart)
|
||||
self.slider.setStartPosition(sliderX)
|
||||
self.axis.update()
|
||||
|
||||
def setStop(self, val):
|
||||
if self.realStop == val:
|
||||
def _zoom(self, z, x):
|
||||
a, b = self._axisView
|
||||
scale = z*b
|
||||
left = x - z*(x - a)
|
||||
if z > 1 and abs(left - self.width()/2) > self.dynamicRange:
|
||||
return
|
||||
sliderX = self.realToRange(val)
|
||||
self.slider.setStopPosition(sliderX)
|
||||
self.realStop = val
|
||||
self.axis.update() # Number of points ticks changed positions.
|
||||
self.sigStopMoved.emit(val)
|
||||
|
||||
def setStart(self, val):
|
||||
if self.realStart == val:
|
||||
return
|
||||
sliderX = self.realToRange(val)
|
||||
self.slider.setStartPosition(sliderX)
|
||||
self.realStart = val
|
||||
self.axis.update()
|
||||
self.sigStartMoved.emit(val)
|
||||
|
||||
def setNumPoints(self, val):
|
||||
if self.numPoints == val:
|
||||
return
|
||||
self.numPoints = val
|
||||
self.axis.update()
|
||||
self.sigNumChanged.emit(val)
|
||||
|
||||
def viewRange(self):
|
||||
newScale = self.slider.effectiveWidth()/abs(
|
||||
self.realStop - self.realStart)
|
||||
newScale *= 1 - 2*self.zoomMargin
|
||||
newCenter = (self.realStop + self.realStart)/2
|
||||
if newCenter:
|
||||
newScale = min(newScale, self.dynamicRange/abs(newCenter))
|
||||
newLeft = newCenter - self.slider.effectiveWidth()/2/newScale
|
||||
self.setView(newLeft, newScale)
|
||||
|
||||
def snapRange(self):
|
||||
lowRange = self.zoomMargin
|
||||
highRange = 1 - self.zoomMargin
|
||||
newStart = self.pixelToReal(lowRange * self.slider.effectiveWidth())
|
||||
newStop = self.pixelToReal(highRange * self.slider.effectiveWidth())
|
||||
self.setStart(newStart)
|
||||
self.setStop(newStop)
|
||||
|
||||
def _handleStartMoved(self, rangeVal):
|
||||
val = self.rangeToReal(rangeVal)
|
||||
self.realStart = val
|
||||
self.axis.update()
|
||||
self.sigStartMoved.emit(val)
|
||||
|
||||
def _handleStopMoved(self, rangeVal):
|
||||
val = self.rangeToReal(rangeVal)
|
||||
self.realStop = val
|
||||
self.axis.update()
|
||||
self.sigStopMoved.emit(val)
|
||||
|
||||
def _handleZoom(self, zoomFactor, mouseXPos):
|
||||
newScale = self.realToPixelTransform[1] * zoomFactor
|
||||
refReal = self.pixelToReal(mouseXPos)
|
||||
newLeft = refReal - mouseXPos/newScale
|
||||
newZero = newLeft*newScale + self.slider.effectiveWidth()/2
|
||||
if zoomFactor > 1 and abs(newZero) > self.dynamicRange:
|
||||
return
|
||||
self.setView(newLeft, newScale)
|
||||
self._setView(left, scale)
|
||||
|
||||
def wheelEvent(self, ev):
|
||||
y = ev.angleDelta().y()
|
||||
y = ev.angleDelta().y()/120.
|
||||
if ev.modifiers() & QtCore.Qt.ShiftModifier:
|
||||
# If shift+scroll, modify number of points.
|
||||
# TODO: This is not perfect. For high-resolution touchpads you
|
||||
# get many small events with y < 120 which should accumulate.
|
||||
# That would also match the wheel behavior of an integer
|
||||
# spinbox.
|
||||
z = int(y / 120.)
|
||||
if z:
|
||||
self.setNumPoints(max(1, self.numPoints + z))
|
||||
ev.accept()
|
||||
elif ev.modifiers() & QtCore.Qt.ControlModifier:
|
||||
# Remove the slider-handle shift correction, b/c none of the
|
||||
# other widgets know about it. If we have the mouse directly
|
||||
# over a tick during a zoom, it should appear as if we are
|
||||
# doing zoom relative to the ticks which live in axis
|
||||
# pixel-space, not slider pixel-space.
|
||||
if y:
|
||||
z = self.zoomFactor**(y / 120.)
|
||||
self._handleZoom(z, ev.x() - self.slider.handleWidth()/2)
|
||||
ev.accept()
|
||||
self.setNum(max(1, self._num + y))
|
||||
elif ev.modifiers() & QtCore.Qt.ControlModifier:
|
||||
if y:
|
||||
self._zoom(self.zoomFactor**y, ev.x())
|
||||
else:
|
||||
ev.ignore()
|
||||
|
||||
def resizeEvent(self, ev):
|
||||
if ev.oldSize().isValid():
|
||||
oldLeft = self.pixelToReal(0)
|
||||
refWidth = ev.oldSize().width() - self.slider.handleWidth()
|
||||
refRight = self.pixelToReal(refWidth)
|
||||
newWidth = ev.size().width() - self.slider.handleWidth()
|
||||
newScale = newWidth/(refRight - oldLeft)
|
||||
center = (self.realStop + self.realStart)/2
|
||||
if center:
|
||||
newScale = min(newScale, self.dynamicRange/abs(center))
|
||||
self.setView(oldLeft, newScale)
|
||||
else:
|
||||
if not ev.oldSize().isValid():
|
||||
self.viewRange()
|
||||
return
|
||||
a, b = self._axisView
|
||||
scale = b*ev.size().width()/ev.oldSize().width()
|
||||
center = (self._stop + self._start)/2
|
||||
if center:
|
||||
scale = min(scale, self.dynamicRange/abs(center))
|
||||
left = a*scale/b
|
||||
self._setView(left, scale)
|
||||
|
||||
def eventFilter(self, obj, ev):
|
||||
if ev.type() == QtCore.QEvent.Wheel:
|
||||
ev.ignore()
|
||||
return True
|
||||
if ev.type() == QtCore.QEvent.Resize:
|
||||
ev.ignore()
|
||||
return True
|
||||
return False
|
||||
def paintEvent(self, ev):
|
||||
self._paintSliders()
|
||||
self._paintAxis()
|
||||
|
||||
def _paintAxis(self):
|
||||
painter = QtGui.QPainter(self)
|
||||
qfm = QtGui.QFontMetrics(painter.font())
|
||||
avgCharWidth = qfm.averageCharWidth()
|
||||
lineSpacing = qfm.lineSpacing()
|
||||
descent = qfm.descent()
|
||||
ascent = qfm.ascent()
|
||||
height = qfm.height()
|
||||
# painter.setRenderHint(QtGui.QPainter.Antialiasing)
|
||||
|
||||
# TODO: make drawable area big enough and move axis higher
|
||||
painter.translate(0, ascent - 15)
|
||||
ticks, prefix, labels = self.ticker(self._pixelToAxis(0),
|
||||
self._pixelToAxis(self.width()))
|
||||
painter.drawText(0, 0, prefix)
|
||||
|
||||
pen = QtGui.QPen()
|
||||
pen.setWidth(2)
|
||||
painter.setPen(pen)
|
||||
|
||||
painter.translate(0, lineSpacing)
|
||||
for t, l in zip(ticks, labels):
|
||||
t = self._axisToPixel(t)
|
||||
painter.drawLine(t, descent, t, height/2)
|
||||
painter.drawText(t - len(l)/2*avgCharWidth, 0, l)
|
||||
painter.drawLine(0, height/2, self.width(), height/2)
|
||||
|
||||
painter.translate(0, height)
|
||||
for p in np.linspace(self._axisToPixel(self._start),
|
||||
self._axisToPixel(self._stop),
|
||||
self._num):
|
||||
# TODO: is drawing far outside the viewport dangerous?
|
||||
painter.drawLine(p, 0, p, -height/2)
|
||||
|
||||
def _paintSliders(self):
|
||||
startPainter = QtWidgets.QStylePainter(self, self._startSlider)
|
||||
stopPainter = QtWidgets.QStylePainter(self, self._stopSlider)
|
||||
opt = self._getStyleOptionSlider(self._start)
|
||||
if opt:
|
||||
startPainter.drawComplexControl(QtWidgets.QStyle.CC_Slider, opt)
|
||||
opt = self._getStyleOptionSlider(self._stop)
|
||||
if opt:
|
||||
stopPainter.drawComplexControl(QtWidgets.QStyle.CC_Slider, opt)
|
||||
|
|
|
|||
Loading…
Reference in New Issue