fixed #5566

added deactivation of algorithms in modeler

git-svn-id: http://sextante.googlecode.com/svn/trunk/soft/bindings/qgis-plugin@182 881b9c09-3ef8-f3c2-ec3d-21d735c97f4d

Author: volayaf@gmail.com

src/sextante/modeler/ModelerAlgorithm.py

@@ -50,6 +50,9 @@ def __init__(self):
         self.algPos = []
         self.paramPos = []
 
+        #deactivated algorithms that should not be executed
+        self.deactivated = []
+
 
     def getIcon(self):
         return QtGui.QIcon(os.path.dirname(__file__) + "/../images/model.png")
@@ -137,6 +140,97 @@ def addAlgorithm(self, alg, parametersMap, valuesMap, outputsMap):
             self.paramValues[value] = valuesMap[value]
         self.algPos.append(self.getPositionForAlgorithmItem())
 
+    def removeAlgorithm(self, index):
+        if self.hasDependencies(self.algs[index], index):
+            return False
+        for out in self.algs[index].outputs:
+            val = self.algOutputs[index][out.name]
+            if val:
+                name = self.getSafeNameForOutput(index, out)
+                self.removeOutputFromName(name)
+        del self.algs[index]
+        del self.algParameters[index]
+        del self.algOutputs[index]
+        del self.algPos[index]
+        self.updateModelerView()
+        return True
+
+    def removeParameter(self, index):
+        if self.hasDependencies(self.parameters[index], index):
+            return False
+        del self.parameters[index]
+        del self.paramPos[index]
+        self.updateModelerView()
+        return True
+
+    def hasDependencies(self, element, elementIndex):
+        '''This method returns true if some other element depends on the passed one'''
+        if isinstance(element, Parameter):
+            for alg in self.algParameters:
+                for aap in alg.values():
+                    if aap.alg == AlgorithmAndParameter.PARENT_MODEL_ALGORITHM:
+                        if aap.param == element.name:
+                            return True
+                        elif aap.param in self.paramValues: #check for multiple inputs
+                            aap2 = self.paramValues[aap.param]
+                            if element.name in aap2:
+                                return True
+            if isinstance(element, ParameterVector):
+                for param in self.parameters:
+                    if isinstance(param, ParameterTableField):
+                        if param.parent == element.name:
+                            return True
+        else:
+            for alg in self.algParameters:
+                for aap in alg.values():
+                    if aap.alg == elementIndex:
+                        return True
+
+        return False
+
+    def deactivateAlgorithm(self, algIndex, update = False):
+        if algIndex not in self.deactivated:
+            self.deactivated.append(algIndex)
+            dependent = self.getDependentAlgorithms(algIndex)
+            for alg in dependent:
+                self.deactivateAlgorithm(alg)
+        if update:
+            self.updateModelerView()
+
+    def activateAlgorithm(self, algIndex, update = False):
+        if algIndex in self.deactivated:
+            dependsOn = self.getDependsOnAlgorithms(algIndex)
+            for alg in dependsOn:
+                if alg in self.deactivated:
+                    return False
+            self.deactivated.remove(algIndex)
+            dependent = self.getDependentAlgorithms(algIndex)
+            for alg in dependent:
+                self.activateAlgorithm(alg)
+        if update:
+            self.updateModelerView()
+        return True
+
+    def getDependsOnAlgorithms(self, algIndex):
+        '''This method returns a list with the indexes of algorithm a given one depends on'''
+        algs = []
+        for aap in self.algParameters[algIndex].values():
+            if aap.alg not in algs:
+                algs.append(aap.alg)
+        return algs
+
+    def getDependentAlgorithms(self, algIndex):
+        '''This method returns a list with the indexes of algorithm depending on a given one'''
+        dependent = []
+        index = -1
+        for alg in self.algParameters:
+            index += 1
+            for aap in alg.values():
+                if aap.alg == algIndex:
+                    dependent.append(index)
+                    break
+        return dependent
+
     def getPositionForAlgorithmItem(self):
         MARGIN = 20
         BOX_WIDTH = 200
@@ -233,18 +327,22 @@ def processAlgorithm(self, progress):
         self.producedOutputs = []
         iAlg = 0
         for alg in self.algs:
-            try:
-                alg = alg.getCopy()#copy.deepcopy(alg)
-                self.prepareAlgorithm(alg, iAlg)
-                progress.setText("Running " + alg.name + " [" + str(iAlg+1) + "/" + str(len(self.algs)) +"]")
-                outputs = {}
-                alg.execute(progress)
-                for out in alg.outputs:
-                    outputs[out.name] = out.value
-                self.producedOutputs.append(outputs)
+            if iAlg in self.deactivated:
                 iAlg += 1
-            except GeoAlgorithmExecutionException, e :
-                raise GeoAlgorithmExecutionException("Error executing algorithm " + str(iAlg) + "\n" + e.msg)
+            else:
+                try:
+                    alg = alg.getCopy()#copy.deepcopy(alg)
+                    self.prepareAlgorithm(alg, iAlg)
+                    progress.setText("Running " + alg.name + " [" + str(iAlg+1) + "/"
+                                     + str(len(self.algs) - len(self.deactivated)) +"]")
+                    outputs = {}
+                    alg.execute(progress)
+                    for out in alg.outputs:
+                        outputs[out.name] = out.value
+                    self.producedOutputs.append(outputs)
+                    iAlg += 1
+                except GeoAlgorithmExecutionException, e :
+                    raise GeoAlgorithmExecutionException("Error executing algorithm " + str(iAlg) + "\n" + e.msg)
 
 
     def getOutputType(self, i, outname):
@@ -341,53 +439,6 @@ def updateModelerView(self):
         if self.modelerdialog:
             self.modelerdialog.repaintModel()
 
-    def removeAlgorithm(self, index):
-        if self.hasDependencies(self.algs[index], index):
-            return False
-        for out in self.algs[index].outputs:
-            val = self.algOutputs[index][out.name]
-            if val:
-                name = self.getSafeNameForOutput(index, out)
-                self.removeOutputFromName(name)
-        del self.algs[index]
-        del self.algParameters[index]
-        del self.algOutputs[index]
-        del self.algPos[index]
-        self.updateModelerView()
-        return True
-
-    def removeParameter(self, index):
-        if self.hasDependencies(self.parameters[index], index):
-            return False
-        del self.parameters[index]
-        del self.paramPos[index]
-        self.updateModelerView()
-        return True
-
-    def hasDependencies(self, element, elementIndex):
-        '''returns true if some other element depends on the passed one'''
-        if isinstance(element, Parameter):
-            for alg in self.algParameters:
-                for aap in alg.values():
-                    if aap.alg == AlgorithmAndParameter.PARENT_MODEL_ALGORITHM:
-                        if aap.param == element.name:
-                            return True
-                        elif aap.param in self.paramValues: #check for multiple inputs
-                            aap2 = self.paramValues[aap.param]
-                            if element.name in aap2:
-                                return True
-            if isinstance(element, ParameterVector):
-                for param in self.parameters:
-                    if isinstance(param, ParameterTableField):
-                        if param.parent == element.name:
-                            return True
-        else:
-            for alg in self.algParameters:
-                for aap in alg.values():
-                    if aap.alg == elementIndex:
-                        return True
-
-        return False
 
     def helpfile(self):
         helpfile = self.descriptionFile + ".help"

src/sextante/modeler/ModelerArrowItem.py

@@ -106,6 +106,8 @@ def paint(self, painter, option, widget=None):
         self.setLine(QtCore.QLineF(intersectPoint, myStartItem.pos()))
         line = self.line()
 
+        if line.length() == 0: #division by zero might occur if arrow has no length
+            return
         angle = math.acos(line.dx() / line.length())
         if line.dy() >= 0:
             angle = (math.pi * 2.0) - angle

src/sextante/modeler/ModelerGraphicItem.py

@@ -1,6 +1,7 @@
 from PyQt4 import QtCore, QtGui
 from sextante.parameters.Parameter import Parameter
 import os
+from sextante.core.GeoAlgorithm import GeoAlgorithm
 
 class ModelerGraphicItem(QtGui.QGraphicsItem):
 
@@ -36,17 +37,31 @@ def contextMenuEvent(self, event):
         popupmenu = QtGui.QMenu()
         removeAction = popupmenu.addAction("Remove")
         removeAction.triggered.connect(self.removeElement)
+        if isinstance(self.element, GeoAlgorithm):
+            if self.elementIndex in self.model.deactivated:
+                removeAction = popupmenu.addAction("Activate")
+                removeAction.triggered.connect(self.activateAlgorithm)
+            else:
+                deactivateAction = popupmenu.addAction("Deactivate")
+                deactivateAction.triggered.connect(self.deactivateAlgorithm)
         popupmenu.exec_(event.screenPos())
 
+    def deactivateAlgorithm(self):
+        self.model.deactivateAlgorithm(self.elementIndex, True)
+
+    def activateAlgorithm(self):
+        if not self.model.activateAlgorithm(self.elementIndex, True):
+            QtGui.QMessageBox.warning(None, "Could not activate Algorithm",
+                                   "The selected algorithm depends on other currently non-active algorithms.\nActivate them them before trying to activate it.")
     def removeElement(self):
         if isinstance(self.element, Parameter):
             if not self.model.removeParameter(self.elementIndex):
                 QtGui.QMessageBox.warning(None, "Could not remove element",
-                                   "Other elements depend on this one.\nRemove them before trying to remove it.")
+                                   "Other elements depend on the selected one.\nRemove them before trying to remove it.")
         else:
             if not self.model.removeAlgorithm(self.elementIndex):
                 QtGui.QMessageBox.warning(None, "Could not remove element",
-                                   "Other elements depend on this one.\nRemove them before trying to remove it.")
+                                   "Other elements depend on the selected one.\nRemove them before trying to remove it.")
 
     def getAdjustedText(self, text):
         return text
@@ -66,6 +81,12 @@ def paint(self, painter, option, widget=None):
         h = fm.height()
         pt = QtCore.QPointF(-w/2, h/2)
         painter.drawText(pt, self.text)
+        if isinstance(self.element, GeoAlgorithm):
+            if self.elementIndex in self.model.deactivated:
+                painter.setPen(QtGui.QPen(QtCore.Qt.red))
+                w = fm.width(QtCore.QString("[deactivated]"))
+                pt = QtCore.QPointF(-w/2, h+h/2)
+                painter.drawText(pt, "[deactivated]")
         painter.drawPixmap(-10 , -(ModelerGraphicItem.BOX_HEIGHT )/3,self.pixmap)
 
 

src/sextante/modeler/ModelerScene.py

@@ -34,7 +34,6 @@ def getLastAlgorithmItem(self):
         else:
             return None
 
-
     def getItemsFromAAP(self, aap, isMultiple):
         items = []
         start = int(aap.alg)