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'''
library for constructing dimension SVGs
'''
from dimensionSvgConstructor import *
from selectionOverlay import generateSelectionGraphicsItems
print('Testing dimensionSvgConstructor.py')
import sys
from PySide import QtGui, QtCore, QtSvg
app = QtGui.QApplication(sys.argv)
width = 640
height = 480
textRenderer = SvgTextRenderer(font_family='Verdana', font_size='16pt', fill="red")
graphicsScene = QtGui.QGraphicsScene(0,0,width,height)
graphicsScene.addText("Linear dimensioning testing app.\nEsc to Exit")
dimensions = []
class DimensioningRect(QtGui.QGraphicsRectItem):
def __init__(self,*args):
super(DimensioningRect, self).__init__(*args)
svgRenderer = QtSvg.QSvgRenderer()
self.action_ind = 0
self.actions = ['selectPoint1','selectPoint2','placeDimensionBaseLine','placeDimensionText']
self.dimPreview = QtSvg.QGraphicsSvgItem()
self.dimSVGRenderer = QtSvg.QSvgRenderer()
self.dimSVGRenderer.load( QtCore.QByteArray( '''<svg width="%i" height="%i"></svg>''' % (args[2],args[3])))
self.dimPreview.setSharedRenderer( self.dimSVGRenderer )
graphicsScene.addItem( self.dimPreview )
self.dim_svg_KWs = dict(
svgTag='svg', svgParms='width="%i" height="%i"' % (args[2],args[3]),
strokeWidth=1.0, arrowL1=10, arrowL2=4, arrowW=6, textRenderer=textRenderer,
scale= 1.0, gap_datum_points = 8, dimension_line_overshoot=4,
)
def selectDimensioningPoint( self, event, referer, elementXML, elementParms, elementViewObject ):
print( elementXML )
if self.action_ind == 0: #then selectPoint1
self.point1 = elementParms['x'], elementParms['y']
self.action_ind = self.action_ind + 1
referer.lockSelection()
self.referer1 = referer
elif self.action_ind == 1: #then selectPoint2
self.point2 = elementParms['x'], elementParms['y']
self.action_ind = self.action_ind + 1
referer.lockSelection()
self.referer2 = referer
def mousePressEvent( self, event ):
if event.button() == QtCore.Qt.MouseButton.LeftButton:
pos = event.scenePos()
x, y = pos.x(), pos.y()
if self.action_ind == 2: #then 'placeDimensionBaseLine':
self.point3 = x, y
print('point3 set to x=%3.1f y=%3.1f' % (x,y))
self.action_ind = self.action_ind + 1
elif self.action_ind == 3: # then placeDimensionText
self.point4 = x, y
self.action_ind = 0
XML = linearDimensionSVG( self.point1[0], self.point1[1],
self.point2[0], self.point2[1],
self.point3[0], self.point3[1],
x, y, **self.dim_svg_KWs )
if XML <> None:
print(XML)
newSvg = QtSvg.QGraphicsSvgItem( )
svgRenderer = QtSvg.QSvgRenderer()
svgRenderer.load( QtCore.QByteArray( XML ))
newSvg.setSharedRenderer( svgRenderer )
dimensions.append([ newSvg, svgRenderer]) #as to prevent the garbage collector from freeing these resources (which causes a crash)
self.scene().addItem( newSvg )
self.referer1.unlockSelection()
self.referer2.unlockSelection()
def hoverMoveEvent(self, event):
pos = event.scenePos()
x, y = pos.x(), pos.y()
XML = None
if self.action_ind == 2: # then placeDimensionBaseLine action
XML = linearDimensionSVG( self.point1[0], self.point1[1],
self.point2[0], self.point2[1], x, y,
**self.dim_svg_KWs )
elif self.action_ind == 3: # then placeDimensionText
XML = linearDimensionSVG( self.point1[0], self.point1[1],
self.point2[0], self.point2[1],
self.point3[0], self.point3[1],
x, y, **self.dim_svg_KWs )
if XML <> None:
self.dimSVGRenderer.load( QtCore.QByteArray( XML ) )
self.dimPreview.update()
self.dimPreview.show()
else:
self.dimPreview.hide()
def wheelEvent( self, event):
if event.delta() > 0:
view.scale(1.1, 1.1)
else:
view.scale(0.9, 0.9)
def keyPressEvent(self, event):
if len(event.text()) == 1:
print('key pressed: event.text %s (ord %i)' % (event.text(), ord(event.text())))
if event.text() == chr(27): #escape key
sys.exit(2)
dimensioningRect = DimensioningRect(0,0,width,height)
dimensioningRect.setAcceptHoverEvents(True)
dimensioningRect.setFlag( QtGui.QGraphicsItem.GraphicsItemFlag.ItemIsFocusable, True )
dimensioningRect.setZValue(-1000)
#creating points to dimension.
circlesXML = []
noPoints = 12
X = [ numpy.random.rand()*width*0.8 for i in range(noPoints) ]
Y = [ numpy.random.rand()*height*0.8 for i in range(noPoints) ]
for i in range(noPoints):
circlesXML.append( '<circle id="circ%03i" cx ="%f" cy ="%f" r ="6" />' % (i,X[i],Y[i]) )
XML = '''<svg id="Ortho_0_1" width="%i" height="%i"> <g stroke-width="0.2" >
%s
</g> </svg>''' % (width, height, '\n'.join(circlesXML) )
class dummyViewObject:
def __init__(self, XML):
self.ViewResult = XML
viewObject = dummyViewObject( XML )
hoverPen = QtGui.QPen( QtGui.QColor(255,0,0) )
hoverPen.setWidth(3.0)
selectGraphicsItems = generateSelectionGraphicsItems( [viewObject], dimensioningRect.selectDimensioningPoint , doCircles=True,
maskPen= QtGui.QPen( QtGui.QColor(0,0,0) ) ,
maskBrush=QtGui.QBrush( QtGui.QColor(0,0,255) ),
maskHoverPen= hoverPen )
graphicsScene.addItem(dimensioningRect)
for g in selectGraphicsItems:
graphicsScene.addItem(g)
view = QtGui.QGraphicsView(graphicsScene)
#view.scale(2, 2)
view.show()
sys.exit(app.exec_())
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