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145 lines
5.6 KiB
Python
145 lines
5.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ModelerScene.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from PyQt4 import QtCore, QtGui
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from processing.modeler.ModelerGraphicItem import ModelerGraphicItem
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from processing.modeler.ModelerArrowItem import ModelerArrowItem
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from processing.modeler.ModelerAlgorithm import ValueFromInput, ValueFromOutput
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class ModelerScene(QtGui.QGraphicsScene):
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def __init__(self, parent=None):
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super(ModelerScene, self).__init__(parent)
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self.paramItems = {}
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self.algItems = {}
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self.outputItems = {}
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self.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)
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def getParameterPositions(self):
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return {key : item.pos() for key,item in self.paramItems.iteritems()}
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def getAlgorithmPositions(self):
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return {key : item.pos() for key,item in self.algItems.iteritems()}
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def getOutputPositions(self):
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pos = {}
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for algName, outputs in self.outputItems.iteritems():
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outputPos = {}
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for (key, value) in outputs.iteritems():
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if value is not None:
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outputPos[key] = value.pos()
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else:
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outputPos[key] = None
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pos[algName] = outputPos
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return pos
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def getItemsFromParamValue(self, value):
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items = []
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if isinstance(value, list):
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for v in value:
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items.extend(self.getItemsFromParamValue(v))
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elif isinstance(value, ValueFromInput):
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items.append((self.paramItems[value.name], 0))
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elif isinstance(value, ValueFromOutput):
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outputs = self.model.algs[value.alg].algorithm.outputs
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for i, out in enumerate(outputs):
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if out.name == value.output:
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break
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items.append((self.algItems[value.alg], i))
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return items
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def paintModel(self, model):
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self.model = model
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# Inputs
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for inp in model.inputs.values():
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item = ModelerGraphicItem(inp, model)
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item.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
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item.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
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self.addItem(item)
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item.setPos(inp.pos.x(), inp.pos.y())
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self.paramItems[inp.param.name] = item
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# We add the algs
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for alg in model.algs.values():
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item = ModelerGraphicItem(alg, model)
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item.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
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item.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
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self.addItem(item)
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item.setPos(alg.pos.x(), alg.pos.y())
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self.algItems[alg.name] = item
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# And then the arrows
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for alg in model.algs.values():
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idx = 0
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for parameter in alg.algorithm.parameters:
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if not parameter.hidden:
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value = alg.params[parameter.name]
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sourceItems = self.getItemsFromParamValue(value)
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for sourceItem, sourceIdx in sourceItems:
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arrow = ModelerArrowItem(sourceItem, sourceIdx, self.algItems[alg.name], idx)
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self.addItem(arrow)
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idx += 1
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for depend in alg.dependencies:
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arrow = ModelerArrowItem(self.algItems[depend], -1,
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self.algItems[alg.name], -1)
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self.addItem(arrow)
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# And finally the outputs
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for alg in model.algs.values():
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outputs = alg.outputs
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outputItems = {}
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idx = 0
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for key in outputs:
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out = outputs[key]
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if out is not None:
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item = ModelerGraphicItem(out, model)
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item.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
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item.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
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self.addItem(item)
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pos = alg.outputs[key].pos
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if pos is None:
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pos = (alg.pos() + QtCore.QPointF(ModelerGraphicItem.BOX_WIDTH, 0)
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+ self.algItems[alg.name].getLinkPointForOutput(idx))
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item.setPos(pos)
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outputItems[key] = item
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arrow = ModelerArrowItem(self.algItems[alg.name], idx, item,
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-1)
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self.addItem(arrow)
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idx += 1
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else:
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outputItems[key] = None
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self.outputItems[alg.name] = outputItems
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def mousePressEvent(self, mouseEvent):
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if mouseEvent.button() != QtCore.Qt.LeftButton:
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return
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super(ModelerScene, self).mousePressEvent(mouseEvent)
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