FemBeamSection.py

# ***************************************************************************
# *                                                                         *
# *   Copyright (c) 2015 - Bernd Hahnebach <bernd@bimstatik.org>            *
# *                                                                         *
# *   This program is free software; you can redistribute it and/or modify  *
# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
# *   as published by the Free Software Foundation; either version 2 of     *
# *   the License, or (at your option) any later version.                   *
# *   for detail see the LICENCE text file.                                 *
# *                                                                         *
# *   This program is distributed in the hope that it will be useful,       *
# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
# *   GNU Library General Public License for more details.                  *
# *                                                                         *
# *   You should have received a copy of the GNU Library General Public     *
# *   License along with this program; if not, write to the Free Software   *
# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
# *   USA                                                                   *
# *                                                                         *
# ***************************************************************************

import FreeCAD

if FreeCAD.GuiUp:
    import FreeCADGui
    import FemGui
    from PySide import QtGui
    from PySide import QtCore
    from pivy import coin


__title__ = "FemBeamSection"
__author__ = "Bernd Hahnebach"
__url__ = "http://www.freecadweb.org"


def makeFemBeamSection(width=20.0, height=20.0, name="BeamSection"):
    '''makeFemBeamSection([width], [height], [name]): creates an beamsection object to define a cross section'''
    obj = FemGui.getActiveAnalysis().Document.addObject("Fem::FeaturePython", name)
    _FemBeamSection(obj)
    obj.Width = width
    obj.Height = height
    if FreeCAD.GuiUp:
        _ViewProviderFemBeamSection(obj.ViewObject)
    return obj


class _CommandFemBeamSection:
    "The Fem_BeamSection command definition"
    def GetResources(self):
        return {'Pixmap': 'fem-beam-section',
                'MenuText': QtCore.QT_TRANSLATE_NOOP("Fem_BeamSection", "FEM Beam Cross Section Definition ..."),
                'Accel': "C, B",
                'ToolTip': QtCore.QT_TRANSLATE_NOOP("Fem_BeamSection", "Creates a FEM Beam Cross Section")}

    def Activated(self):
        FreeCAD.ActiveDocument.openTransaction("Create FemBeamSection")
        FreeCADGui.addModule("FemBeamSection")
        FreeCADGui.doCommand("FemGui.getActiveAnalysis().Member = FemGui.getActiveAnalysis().Member + [FemBeamSection.makeFemBeamSection()]")

    def IsActive(self):
        if FemGui.getActiveAnalysis():
            return True
        else:
            return False


class _FemBeamSection:
    "The FemBeamSection object"
    def __init__(self, obj):
        obj.addProperty("App::PropertyLength", "Width", "BeamSection", "set width of the beam elements")
        obj.addProperty("App::PropertyLength", "Height", "BeamSection", "set height of the beam elements")
        obj.addProperty("App::PropertyLinkSubList", "References", "BeamSection", "List of beam section shapes")
        obj.Proxy = self
        self.Type = "FemBeamSection"

    def execute(self, obj):
        return


class _ViewProviderFemBeamSection:
    "A View Provider for the FemBeamSection object"
    def __init__(self, vobj):
        vobj.Proxy = self

    def getIcon(self):
        return ":/icons/fem-beam-section.svg"

    def attach(self, vobj):
        self.ViewObject = vobj
        self.Object = vobj.Object
        self.standard = coin.SoGroup()
        vobj.addDisplayMode(self.standard, "Standard")

    def getDisplayModes(self, obj):
        return ["Standard"]

    def getDefaultDisplayMode(self):
        return "Standard"

    def updateData(self, obj, prop):
        return

    def onChanged(self, vobj, prop):
        return

    def setEdit(self, vobj, mode=0):
        taskd = _FemBeamSectionTaskPanel(self.Object)
        taskd.obj = vobj.Object
        #taskd.update()     When is this needed ?
        FreeCADGui.Control.showDialog(taskd)
        return True

    def unsetEdit(self, vobj, mode=0):
        FreeCADGui.Control.closeDialog()
        return

    def doubleClicked(self, vobj):
        self.setEdit(vobj)

    def __getstate__(self):
        return None

    def __setstate__(self, state):
        return None


class _FemBeamSectionTaskPanel:
    '''The TaskPanel for editing References property of FemBeamSection objects'''
    def __init__(self, obj):
        FreeCADGui.Selection.clearSelection()
        self.sel_server = None
        self.obj = obj
        self.form = FreeCADGui.PySideUic.loadUi(FreeCAD.getHomePath() + "Mod/Fem/FemBeamSection.ui")

        QtCore.QObject.connect(self.form.pushButton_Reference, QtCore.SIGNAL("clicked()"), self.add_references)
        self.form.list_References.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
        self.form.list_References.connect(self.form.list_References, QtCore.SIGNAL("customContextMenuRequested(QPoint)"), self.references_list_right_clicked)

        self.previous_references = self.obj.References
        self.references = self.obj.References
        self.rebuild_list_References()

    def accept(self):
        if self.sel_server:
            FreeCADGui.Selection.removeObserver(self.sel_server)
        self.obj.References = self.references
        FreeCADGui.ActiveDocument.resetEdit()
        FreeCAD.ActiveDocument.recompute()
        return True

    def reject(self):
        if self.sel_server:
            FreeCADGui.Selection.removeObserver(self.sel_server)
        FreeCADGui.ActiveDocument.resetEdit()
        return True

    def references_list_right_clicked(self, QPos):
        self.form.contextMenu = QtGui.QMenu()
        menu_item = self.form.contextMenu.addAction("Remove Reference")
        if not self.references:
            menu_item.setDisabled(True)
        self.form.connect(menu_item, QtCore.SIGNAL("triggered()"), self.remove_reference)
        parentPosition = self.form.list_References.mapToGlobal(QtCore.QPoint(0, 0))
        self.form.contextMenu.move(parentPosition + QPos)
        self.form.contextMenu.show()

    def remove_reference(self):
        if not self.references:
            return
        currentItemName = str(self.form.list_References.currentItem().text())
        for ref in self.references:
            refname_to_compare_listentry = ref[0].Name + '-->' + ref[1]
            if refname_to_compare_listentry == currentItemName:
                self.references.remove(ref)
        self.rebuild_list_References()

    def add_references(self):
        '''Called if Button add_reference is triggered'''
        # in constraints EditTaskPanel the selection is active as soon as the taskpanel is open
        # here the addReference button EditTaskPanel has to be triggered to start selection mode
        FreeCADGui.Selection.clearSelection()
        # start SelectionObserver and parse the function to add the References to the widget
        self.sel_server = ReferenceShapeSelectionObserver(self.selectionParser)

    def selectionParser(self, selsub):
        sel = selsub[0]
        sub = selsub[1]
        # print 'selection: ', sel.Shape.ShapeType, '  ', sel.Name, '  ', sub
        if hasattr(sel, "Shape"):
            elt = sel.Shape.getElement(sub)
            if elt.ShapeType == 'Edge':
                if selsub not in self.references:
                    self.references.append(selsub)
                    self.rebuild_list_References()
                else:
                    print sel.Name, '-->', sub, ' is already in reference list!'

        else:
            print 'Selection has no shape!'

    def rebuild_list_References(self):
        self.form.list_References.clear()
        items = []
        for i in self.references:
            item_name = i[0].Name + '-->' + i[1]
            items.append(item_name)
        for listItemName in sorted(items):
            listItem = QtGui.QListWidgetItem(listItemName, self.form.list_References)  # listItem =   is needed


class ReferenceShapeSelectionObserver:
    '''ReferenceShapeSelectionObserver
       started on click  button addReference'''
    def __init__(self, parseSelectionFunction):
        self.parseSelectionFunction = parseSelectionFunction
        FreeCADGui.Selection.addObserver(self)
        FreeCAD.Console.PrintMessage("Select Faces to add them to the list!\n")

    def addSelection(self, docName, objName, sub, pos):
        selected_object = FreeCAD.getDocument(docName).getObject(objName)  # get the obj objName
        self.added_obj = (selected_object, sub)
        if sub:         # on doubleClick the solid is selected and sub will be empty
            self.parseSelectionFunction(self.added_obj)


if FreeCAD.GuiUp:
    FreeCADGui.addCommand('Fem_BeamSection', _CommandFemBeamSection())