def populateTreeItem(addToBeamClickText, item, element):
item.setText(0, element.name)
item.setText(1, element.displayLine())
item.setText(2, displayWithUnitsNumber(roundSigFig(element.getLength(), 4), 'm'))
item.setText(3, displayWithUnitsNumber(roundSigFig(element.getDisplacement(), 4), 'm'))
item.setText(4, str(roundSigFig(convertUnitsNumber(element.getAngle(), 'rad', 'deg'), 4))+' deg')
item.setText(5, str(element.getNumberOfElements()) if element.isBeamline() else '')
item.setText(6, addToBeamClickText)
item.setForeground(6, rt_qt.QtCore.Qt.blue)
font = item.font(6)
font.setBold(True)
font.setUnderline(True)
item.setFont(6, font)
def drawLengthScale(self):
if self.ui.graphicsView.scene() is None or len(self.ui.graphicsView.scene().items()) == 0:
return
self.removeLengthScale()
vis = self.visibleSceneRect()
# Determine a reasonable length to display
length = 1.0 # meter
widthFraction = 0.25 # maximum length of legend w.r.t. preview window
resolution = self.classDictionary.values()[0]().getResolution()
while length*resolution < float(vis.width())*widthFraction:
length = length*10.0
while length*resolution > float(vis.width())*widthFraction:
length = length/10.0
textItem = rt_qt.QtGui.QGraphicsTextItem(displayWithUnitsNumber(length, 'm'))
pixLength = int(length*resolution)
if pixLength < 1:
return
# line showing length given by textItem
try:
rightEnd = rt_qt.QtCore.QPoint(vis.right()-vis.width()/10,
vis.bottom()-vis.height()/10)
except OverflowError:
self.zoomPreview(1)
return
leftEnd = rightEnd - rt_qt.QtCore.QPoint(pixLength,0)
self.lengthLegend.append(rt_qt.QtGui.QGraphicsLineItem(leftEnd.x(),
leftEnd.y(),
rightEnd.x(),
rightEnd.y()))
endHeight = int(20.0/self.zoomScale) # constant-height despite zooming
if endHeight <= 0:
self.zoomPreview(-1)
return
# left upright bracket
self.lengthLegend.append(rt_qt.QtGui.QGraphicsLineItem(leftEnd.x(),
leftEnd.y()+endHeight,
leftEnd.x(),
leftEnd.y()-endHeight))
# right upright bracket
self.lengthLegend.append(rt_qt.QtGui.QGraphicsLineItem(rightEnd.x(),
rightEnd.y()+endHeight,
rightEnd.x(),
rightEnd.y()-endHeight))
# Scale textItem so it always appears the same size
textItem.translate(rightEnd.x(),
rightEnd.y() -
textItem.boundingRect().height()/(2*self.zoomScale))
textItem.scale(1.0/self.zoomScale,
1.0/self.zoomScale)
self.lengthLegend.append(textItem)
for item in self.lengthLegend:
self.ui.graphicsView.scene().addItem(item)
