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186 lines
8.5 KiB
Python
186 lines
8.5 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 qgis.PyQt.QtCore import QPointF, Qt
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from qgis.PyQt.QtWidgets import QGraphicsItem, QGraphicsScene
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from qgis.core import (QgsProcessingParameterDefinition,
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QgsProcessingModelChildParameterSource,
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QgsExpression)
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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.tools.dataobjects import createContext
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class ModelerScene(QGraphicsScene):
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def __init__(self, parent=None, dialog=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(QGraphicsScene.NoIndex)
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self.dialog = dialog
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def getParameterPositions(self):
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return {key: item.pos() for key, item in list(self.paramItems.items())}
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def getAlgorithmPositions(self):
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return {key: item.pos() for key, item in list(self.algItems.items())}
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def getOutputPositions(self):
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pos = {}
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for algName, outputs in list(self.outputItems.items()):
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outputPos = {}
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for (key, value) in list(outputs.items()):
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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, child_id, context):
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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, child_id, context))
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elif isinstance(value, QgsProcessingModelChildParameterSource):
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if value.source() == QgsProcessingModelChildParameterSource.ModelParameter:
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items.append((self.paramItems[value.parameterName()], 0))
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elif value.source() == QgsProcessingModelChildParameterSource.ChildOutput:
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outputs = self.model.childAlgorithm(value.outputChildId()).algorithm().outputDefinitions()
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for i, out in enumerate(outputs):
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if out.name() == value.outputName():
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break
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if value.outputChildId() in self.algItems:
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items.append((self.algItems[value.outputChildId()], i))
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elif value.source() == QgsProcessingModelChildParameterSource.Expression:
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variables = self.model.variablesForChildAlgorithm(child_id, context)
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exp = QgsExpression(value.expression())
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for v in exp.referencedVariables():
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if v in variables:
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items.extend(self.getItemsFromParamValue(variables[v].source, child_id, context))
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return items
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def paintModel(self, model, controls=True):
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self.model = model
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context = createContext()
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# Inputs
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for inp in list(model.parameterComponents().values()):
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item = ModelerGraphicItem(inp, model, controls, scene=self)
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item.setFlag(QGraphicsItem.ItemIsMovable, True)
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item.setFlag(QGraphicsItem.ItemIsSelectable, True)
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self.addItem(item)
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item.setPos(inp.position().x(), inp.position().y())
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self.paramItems[inp.parameterName()] = item
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# Input dependency arrows
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for input_name in list(model.parameterComponents().keys()):
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idx = 0
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parameter_def = model.parameterDefinition(input_name)
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if hasattr(parameter_def, 'parentLayerParameterName') and parameter_def.parentLayerParameterName():
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parent_name = parameter_def.parentLayerParameterName()
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if input_name in self.paramItems and parent_name in self.paramItems:
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input_item = self.paramItems[input_name]
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parent_item = self.paramItems[parent_name]
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arrow = ModelerArrowItem(parent_item, -1, input_item, -1)
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input_item.addArrow(arrow)
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parent_item.addArrow(arrow)
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arrow.setPenStyle(Qt.DotLine)
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arrow.updatePath()
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self.addItem(arrow)
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# We add the algs
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for alg in list(model.childAlgorithms().values()):
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item = ModelerGraphicItem(alg, model, controls, scene=self)
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item.setFlag(QGraphicsItem.ItemIsMovable, True)
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item.setFlag(QGraphicsItem.ItemIsSelectable, True)
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self.addItem(item)
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item.setPos(alg.position().x(), alg.position().y())
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self.algItems[alg.childId()] = item
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# And then the arrows
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for alg in list(model.childAlgorithms().values()):
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idx = 0
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for parameter in alg.algorithm().parameterDefinitions():
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if not parameter.isDestination() and not parameter.flags() & QgsProcessingParameterDefinition.FlagHidden:
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if parameter.name() in alg.parameterSources():
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sources = alg.parameterSources()[parameter.name()]
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else:
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sources = []
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for source in sources:
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sourceItems = self.getItemsFromParamValue(source, alg.childId(), context)
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for sourceItem, sourceIdx in sourceItems:
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arrow = ModelerArrowItem(sourceItem, sourceIdx, self.algItems[alg.childId()], idx)
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sourceItem.addArrow(arrow)
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self.algItems[alg.childId()].addArrow(arrow)
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arrow.updatePath()
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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.childId()], -1)
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self.algItems[depend].addArrow(arrow)
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self.algItems[alg.childId()].addArrow(arrow)
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arrow.updatePath()
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self.addItem(arrow)
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# And finally the outputs
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for alg in list(model.childAlgorithms().values()):
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outputs = alg.modelOutputs()
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outputItems = {}
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idx = 0
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for key, out in outputs.items():
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if out is not None:
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item = ModelerGraphicItem(out, model, controls, scene=self)
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item.setFlag(QGraphicsItem.ItemIsMovable, True)
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item.setFlag(QGraphicsItem.ItemIsSelectable, True)
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self.addItem(item)
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pos = out.position()
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if pos is None:
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pos = (alg.position() + QPointF(ModelerGraphicItem.BOX_WIDTH, 0) +
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self.algItems[alg.childId()].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.childId()], idx, item,
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-1)
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self.algItems[alg.childId()].addArrow(arrow)
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item.addArrow(arrow)
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arrow.updatePath()
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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.childId()] = outputItems
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def mousePressEvent(self, mouseEvent):
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if mouseEvent.button() != Qt.LeftButton:
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return
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super(ModelerScene, self).mousePressEvent(mouseEvent)
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