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scanwidget: cleanup interactive behavior (48a0208)

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This commit is contained in:
Robert Jördens 2016-03-18 21:53:06 +01:00
parent d60eaa7b44
commit 80b13b1263
1 changed files with 23 additions and 29 deletions
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52
artiq/gui/scanwidget.py
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@ -58,10 +58,16 @@ class ScanWidget(QtWidgets.QWidget):
a, b = self._axisView
return (val - a)/b
def _setView(self, axis_left, axis_scale):
self._axisView = axis_left, axis_scale
def _setView(self, left, scale):
self._axisView = left, scale
self.update()
def _setViewAxis(self, center, scale):
if center:
scale = min(scale, self.dynamicRange/abs(center))
left = self.width()/2 - center*scale
self._setView(left, scale)
def setStart(self, val):
if self._start == val:
return
@ -88,14 +94,9 @@ class ScanWidget(QtWidgets.QWidget):
scale = self.width()*(1 - 2*self.zoomMargin)
if self._stop != self._start:
scale /= abs(self._stop - self._start)
if center:
scale = min(scale, self.dynamicRange/abs(center))
else:
scale = self.dynamicRange
if center:
scale /= abs(center)
left = self.width()/2 - center*scale
self._setView(left, scale)
self._setViewAxis(center, scale)
def snapRange(self):
self.setStart(self._pixelToAxis(self.zoomMargin*self.width()))
@ -111,11 +112,11 @@ class ScanWidget(QtWidgets.QWidget):
self.setStop(self._start)
elif ev.modifiers() & QtCore.Qt.ControlModifier:
self._drag = "zoom"
self._offset = ev.pos()
self._offset = QtCore.QPoint(ev.x(), 0)
self._rubber = QtWidgets.QRubberBand(
QtWidgets.QRubberBand.Rectangle, self)
self._rubber.setGeometry(
QtCore.QRect(self._offset, QtCore.QSize()))
self._rubber.setGeometry(QtCore.QRect(
self._offset, QtCore.QPoint(ev.x(), self.height() - 1)))
self._rubber.show()
else:
qfm = QtGui.QFontMetrics(self.font())
@ -144,7 +145,8 @@ class ScanWidget(QtWidgets.QWidget):
self.setStop(self._pixelToAxis(ev.x()))
elif self._drag == "zoom":
self._rubber.setGeometry(QtCore.QRect(
self._offset, ev.pos()).normalized())
self._offset, QtCore.QPoint(ev.x(), self.height() - 1)
).normalized())
elif self._drag == "axis":
self._setView(ev.x() - self._offset, self._axisView[1])
elif self._drag == "start":
@ -158,22 +160,18 @@ class ScanWidget(QtWidgets.QWidget):
def mouseReleaseEvent(self, ev):
if self._drag == "zoom":
self._rubber.hide()
left, scale = self._axisView
center = self._pixelToAxis(self._rubber.geometry().center().x())
if self._rubber.geometry().width():
scale = self._axisView[1]
scale *= self.width()/self._rubber.geometry().width()
if center:
scale = min(scale, self.dynamicRange/abs(center))
elif center:
scale = self.dynamicRange/abs(center)
left = self.width()/2 - center*scale
self._setView(left, scale)
center = self._pixelToAxis(
self._rubber.geometry().center().x())
self._setViewAxis(center, scale)
self._drag = None
def _zoom(self, z, x):
a, b = self._axisView
scale = z*b
left = x - z*(x - a)
left = x + z*(a - x)
if z > 1 and abs(left - self.width()/2) > self.dynamicRange:
return
self._setView(left, scale)
@ -191,15 +189,12 @@ class ScanWidget(QtWidgets.QWidget):
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.ticker.min_ticks = max(
3, int(ev.size().width()/(2.5*self._labelSize.width())))
self._setView(left, scale)
scale = self._axisView[1]
scale *= ev.size().width()/ev.oldSize().width()
center = self._pixelToAxis(ev.oldSize().width()/2)
self._setViewAxis(center, scale)
def paintEvent(self, ev):
painter = QtGui.QPainter(self)
@ -215,7 +210,6 @@ class ScanWidget(QtWidgets.QWidget):
painter.drawText(0, 0, prefix)
painter.translate(0, lineSpacing)
painter.setPen(QtGui.QPen(QtCore.Qt.black, 1, QtCore.Qt.SolidLine))
for t, l in zip(ticks, labels):
t = self._axisToPixel(t)
painter.drawText(t - len(l)/2*avgCharWidth, 0, l)