forked from M-Labs/artiq
scanwidget: just do QWidget (337af80)
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a75ee76463
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@ -9,13 +9,13 @@ from .ticker import Ticker
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logger = logging.getLogger(__name__)
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class ScanWidget(QtWidgets.QSlider):
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class ScanWidget(QtWidgets.QWidget):
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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 __init__(self, zoomFactor=1.05, zoomMargin=.1, dynamicRange=1e9):
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QtWidgets.QSlider.__init__(self, QtCore.Qt.Horizontal)
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QtWidgets.QWidget.__init__(self)
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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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@ -30,15 +30,13 @@ class ScanWidget(QtWidgets.QSlider):
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action.triggered.connect(self.snapRange)
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self.menu.addAction(action)
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self.setRange(0, 4095)
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qfm = QtGui.QFontMetrics(self.font())
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self._labelSize = QtCore.QSize(
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(self.ticker.precision + 5)*qfm.averageCharWidth(),
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qfm.lineSpacing())
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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._axisView = None, None
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self._offset, self._pressed, self._dragLeft = None, None, None
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def contextMenuEvent(self, ev):
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@ -60,21 +58,7 @@ class ScanWidget(QtWidgets.QSlider):
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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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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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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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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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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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@ -116,36 +100,12 @@ class ScanWidget(QtWidgets.QSlider):
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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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rect = self.rect()
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qfm = QtGui.QFontMetrics(self.font())
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opt.rect = QtCore.QRect(0, 3*qfm.lineSpacing(), rect.width(),
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qfm.lineSpacing())
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opt.sliderPosition = val
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opt.sliderValue = val
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opt.subControls = QtWidgets.QStyle.SC_SliderHandle
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return opt
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def _hitHandle(self, pos, val):
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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(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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return True
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qfm = QtGui.QFontMetrics(self.font())
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val = self._axisToPixel(val)
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rect = QtCore.QRect(val - qfm.lineSpacing()/2, 3*qfm.lineSpacing(),
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qfm.lineSpacing(), qfm.lineSpacing())
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return rect.contains(pos)
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def mousePressEvent(self, ev):
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if ev.buttons() ^ ev.button():
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@ -153,8 +113,10 @@ class ScanWidget(QtWidgets.QSlider):
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return
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if self._hitHandle(ev.pos(), self._stop):
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self._pressed = "stop"
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self._offset = ev.x() - self._axisToPixel(self._stop)
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elif self._hitHandle(ev.pos(), self._start):
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self._pressed = "start"
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self._offset = ev.x() - self._axisToPixel(self._stop)
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else:
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self._pressed = "axis"
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self._offset = ev.x()
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@ -167,20 +129,16 @@ class ScanWidget(QtWidgets.QSlider):
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if self._pressed == "stop":
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self._stop = self._pixelToAxis(ev.x() - self._offset)
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self.update()
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if self.hasTracking():
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self.stopChanged.emit(self._stop)
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self.stopChanged.emit(self._stop)
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elif self._pressed == "start":
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self._start = self._pixelToAxis(ev.x() - self._offset)
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self.update()
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if self.hasTracking():
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self.startChanged.emit(self._start)
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self.startChanged.emit(self._start)
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elif self._pressed == "axis":
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self._setView(self._dragLeft + ev.x() - self._offset,
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self._axisView[1])
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def mouseReleaseEvent(self, ev):
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QtWidgets.QSlider.mouseReleaseEvent(self, ev)
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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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@ -250,9 +208,8 @@ class ScanWidget(QtWidgets.QSlider):
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for x, c in (self._start, QtCore.Qt.blue), (self._stop, QtCore.Qt.red):
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x = self._axisToPixel(x)
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if self.minimum() <= x <= self.maximum():
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painter.setPen(c)
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painter.setBrush(c)
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painter.drawPolygon(*(QtCore.QPointF(*i) for i in [
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(x, 0), (x - lineSpacing/2, lineSpacing),
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(x + lineSpacing/2, lineSpacing)]))
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painter.setPen(c)
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painter.setBrush(c)
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painter.drawPolygon(*(QtCore.QPointF(*i) for i in [
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(x, 0), (x - lineSpacing/2, lineSpacing),
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(x + lineSpacing/2, lineSpacing)]))
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