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scanwidget: drag modes (9a7fcd4)

This commit is contained in:
Robert Jördens 2016-03-16 23:05:23 +01:00
parent 5d5ef356f4
commit fb31782b6f
1 changed files with 36 additions and 35 deletions
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71
artiq/gui/scanwidget.py
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@ -36,8 +36,8 @@ class ScanWidget(QtWidgets.QWidget):
qfm.lineSpacing()) qfm.lineSpacing())
self._start, self._stop, self._num = None, None, None self._start, self._stop, self._num = None, None, None
self._axisView = None, None self._axisView = None
self._offset, self._pressed, self._dragLeft = None, None, None self._offset, self._drag = None, None
def contextMenuEvent(self, ev): def contextMenuEvent(self, ev):
self.menu.popup(ev.globalPos()) self.menu.popup(ev.globalPos())
@ -100,50 +100,50 @@ class ScanWidget(QtWidgets.QWidget):
self.setStart(self._pixelToAxis(self.zoomMargin*self.width())) self.setStart(self._pixelToAxis(self.zoomMargin*self.width()))
self.setStop(self._pixelToAxis((1 - self.zoomMargin)*self.width())) self.setStop(self._pixelToAxis((1 - self.zoomMargin)*self.width()))
def _hitHandle(self, pos, val):
qfm = QtGui.QFontMetrics(self.font())
val = self._axisToPixel(val)
rect = QtCore.QRect(val - qfm.lineSpacing()/2, 3*qfm.lineSpacing(),
qfm.lineSpacing(), qfm.lineSpacing())
return rect.contains(pos)
def mousePressEvent(self, ev): def mousePressEvent(self, ev):
if ev.buttons() ^ ev.button(): if ev.buttons() ^ ev.button(): # buttons changed
ev.ignore() ev.ignore()
return return
if self._hitHandle(ev.pos(), self._stop): qfm = QtGui.QFontMetrics(self.font())
self._pressed = "stop" if ev.y() <= 2.5*qfm.lineSpacing(): # axis
self._offset = ev.x() - self._axisToPixel(self._stop) self._drag = "axis"
elif self._hitHandle(ev.pos(), self._start): self._offset = ev.x() - self._axisView[0]
self._pressed = "start" elif abs(self._axisToPixel(self._stop) -
ev.x()) < qfm.lineSpacing()/2:
self._drag = "stop"
self._offset = ev.x() - self._axisToPixel(self._stop) self._offset = ev.x() - self._axisToPixel(self._stop)
elif abs(self._axisToPixel(self._start) -
ev.x()) < qfm.lineSpacing()/2:
self._drag = "start"
self._offset = ev.x() - self._axisToPixel(self._start)
else: else:
self._pressed = "axis" self._drag = "both"
self._offset = ev.x() self._offset = (ev.x() - self._axisToPixel(self._start),
self._dragLeft = self._axisView[0] ev.x() - self._axisToPixel(self._stop))
def mouseMoveEvent(self, ev): def mouseMoveEvent(self, ev):
if not self._pressed: if not self._drag:
ev.ignore() ev.ignore()
return return
if self._pressed == "stop": if self._drag == "axis":
self._setView(ev.x() - self._offset, self._axisView[1])
elif self._drag == "stop":
self._stop = self._pixelToAxis(ev.x() - self._offset) self._stop = self._pixelToAxis(ev.x() - self._offset)
self.update() self.update()
self.stopChanged.emit(self._stop) self.stopChanged.emit(self._stop)
elif self._pressed == "start": elif self._drag == "start":
self._start = self._pixelToAxis(ev.x() - self._offset) self._start = self._pixelToAxis(ev.x() - self._offset)
self.update() self.update()
self.startChanged.emit(self._start) self.startChanged.emit(self._start)
elif self._pressed == "axis": elif self._drag == "both":
self._setView(self._dragLeft + ev.x() - self._offset, self._start = self._pixelToAxis(ev.x() - self._offset[0])
self._axisView[1]) self._stop = self._pixelToAxis(ev.x() - self._offset[1])
self.update()
self.startChanged.emit(self._start)
self.stopChanged.emit(self._stop)
def mouseReleaseEvent(self, ev): def mouseReleaseEvent(self, ev):
if self._pressed == "start": self._drag = None
self.startChanged.emit(self._start)
elif self._pressed == "stop":
self.stopChanged.emit(self._stop)
self._pressed = None
def _zoom(self, z, x): def _zoom(self, z, x):
a, b = self._axisView a, b = self._axisView
@ -184,27 +184,28 @@ class ScanWidget(QtWidgets.QWidget):
avgCharWidth = qfm.averageCharWidth() avgCharWidth = qfm.averageCharWidth()
lineSpacing = qfm.lineSpacing() lineSpacing = qfm.lineSpacing()
descent = qfm.descent() descent = qfm.descent()
painter.translate(0, lineSpacing) ascent = qfm.ascent()
painter.translate(0, ascent)
ticks, prefix, labels = self.ticker(self._pixelToAxis(0), ticks, prefix, labels = self.ticker(self._pixelToAxis(0),
self._pixelToAxis(self.width())) self._pixelToAxis(self.width()))
painter.drawText(0, 0, prefix) painter.drawText(0, 0, prefix)
painter.translate(0, lineSpacing) painter.translate(0, lineSpacing)
painter.setPen(QtGui.QPen(QtCore.Qt.black, 2, QtCore.Qt.SolidLine)) painter.setPen(QtGui.QPen(QtCore.Qt.black, 1, QtCore.Qt.SolidLine))
for t, l in zip(ticks, labels): for t, l in zip(ticks, labels):
t = self._axisToPixel(t) t = self._axisToPixel(t)
painter.drawText(t - len(l)/2*avgCharWidth, 0, l) painter.drawText(t - len(l)/2*avgCharWidth, 0, l)
painter.drawLine(t, descent, t, (lineSpacing + descent)/2) painter.drawLine(t, descent, t, lineSpacing/2)
painter.translate(0, (lineSpacing + descent)/2) painter.translate(0, lineSpacing/2)
painter.drawLine(0, 0, self.width(), 0) painter.drawLine(0, 0, self.width(), 0)
for p in np.linspace(self._axisToPixel(self._start), for p in np.linspace(self._axisToPixel(self._start),
self._axisToPixel(self._stop), self._axisToPixel(self._stop),
self._num): self._num):
painter.drawLine(p, 0, p, (lineSpacing - descent)/2) painter.drawLine(p, 0, p, lineSpacing/2)
painter.translate(0, (lineSpacing - descent)/2) painter.translate(0, lineSpacing/2)
for x, c in (self._start, QtCore.Qt.blue), (self._stop, QtCore.Qt.red): for x, c in (self._start, QtCore.Qt.blue), (self._stop, QtCore.Qt.red):
x = self._axisToPixel(x) x = self._axisToPixel(x)