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IMP: geomtools, integration of helper functions to add/remove shape to/from study and to display/erase shape to/from a viewer.
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@ -5,17 +5,36 @@ General presentation of the GEOM python package
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The GEOM python package essentially contains:
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* Utility functions to handle GEOM items in Salome study.
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* Wrapping functions to help the usage of existing tools:
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* Utility functions to handle GEOM items in Salome study (see ``geomtools.py``).
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- a sketcher module to create sketches from the python API
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- add a shape to a study, remove from the study
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- display a shape in a viewer, erase the shape from the viewers
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- completly delete a shape (undisplay, unpublish, and destroy the shape)
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- helper functions to manage the selection in the object browser
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* Wrapping functions to help the usage of GEOM tools:
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- a sketcher module to create sketches from the python API (see
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``sketcher.py``)
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* The visualization of structural elements: a function to create
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geometrical 3D representations of mechanical models called
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"structural elements".
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"structural elements" (see package ``structelem``)
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The functions are distributed in the python package
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``salome.geom``. For example, the usage of the visualization of
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structural elements can be appreciated with this set of instructions:
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``salome.geom``. The specification of the programming interface of
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this package is detailled in the part :doc:`Documentation of the
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programming interface (API)</docapi>` of this documentation.
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.. note::
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The main package ``salome`` contains other sub-packages that are
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distributed with the other SALOME modules. For example, the KERNEL
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module provides the python package ``salome.kernel`` and SMESH the
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package ``salome.smesh``.
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Visualization of structural elements (package ``structelem``)
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-------------------------------------------------------------
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The usage of the visualization of structural elements can be
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appreciated with this set of instructions:
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.. code-block:: python
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@ -27,12 +46,30 @@ This creates the geometrical objects displayed in the study below:
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.. image:: /images/salome-geom-structuralelements.png
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:align: center
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The specification of the programming interface of this package is
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detailled in the part :doc:`Documentation of the programming interface
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(API)</docapi>` of this documentation.
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Manipulate GEOM object in the study (module ``geomtools``)
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----------------------------------------------------------
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.. note::
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The main package ``salome`` contains other sub-packages that are
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distributed with the other SALOME modules. For example, the KERNEL
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module provides the python package ``salome.kernel`` and SMESH the
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package ``salome.smesh``.
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The usage of the ``geomtools`` module can be appreciated with this set
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of instructions:
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.. code-block:: python
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from salome.geom.geomtools import TEST_createAndDeleteShape
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TEST_createAndDeleteShape()
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This test executes the following procedure:
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* Create, publish, and display a cylinder
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* Create, publish, and display a sphere
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* Create a box, publish it in a folder "boxset", and display it with a
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"pink" color.
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* Erase the sphere from the viewer (the sphere still exists in the study)
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* Delete the cylinder (the cylinder is no longer displayed and does
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not exist any more, neither in the study nor the GEOM componet.
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At the end of the execution of this test, you should have in the
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SALOME session:
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* the box, in a dedicated folder of the study, and displayed in the
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viewer
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* the sphere, in the standard place of the study, and not displayed
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@ -31,9 +31,9 @@ from salome.kernel import termcolor
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logger = Logger("salome.geom.geomtools", color = termcolor.RED)
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from salome.kernel.studyedit import getActiveStudyId, getStudyEditor
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from salome.kernel.services import IDToObject
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from salome.kernel.services import IDToObject, IDToSObject
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try:
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from salome.gui import helper
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from salome.gui import helper as guihelper
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except:
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pass
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@ -69,6 +69,7 @@ def getGeompy(studyId = None):
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ModeWireFrame = 0
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ModeShading = 1
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DisplayMode=ModeShading
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PreviewColor=[236,163,255]
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class GeomStudyTools:
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"""
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@ -94,7 +95,78 @@ class GeomStudyTools:
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studyEditor = getStudyEditor()
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self.editor = studyEditor
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def displayShapeByName(self, shapeName, color = None):
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# ======================================================================
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# Helper functions to add/remove a geometrical shape in/from the study
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# ======================================================================
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def addShapeToStudy(self, shape,shapeName,folderName=None):
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"""
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Add a GEOM shape in the study. It returns the associated entry
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that corresponds to the identifier of the entry in the study. This
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entry can be used to retrieve an object in the study. A folderName
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can be specified. In this case, a folder with this name is first
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created in the Geometry part of the study, and the shape study
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object is stored in this folder of the study.
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:type shape: GEOM object
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:param shape: the GEOM object defining the shape
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:type shapeName: string
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:param shapeName: the name for this shape in the study
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:type folderName: string
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:param folderName: the name of a folder in the GEOM part of the study
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"""
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study = self.editor.study
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studyId = study._get_StudyId()
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geompy = getGeompy(studyId)
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if folderName is None:
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# Insert the shape in the study by the standard way
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entry = geompy.addToStudy( shape, shapeName )
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else:
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# A folder name has been specified to embed this shape. Find
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# or create a folder with this name in the Geometry study, and
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# then store the shape in this folder.
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geomStudyFolder = self.editor.findOrCreateComponent("GEOM")
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shapeStudyFolder = self.editor.findOrCreateItem(geomStudyFolder,folderName)
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shapeIor = salome.orb.object_to_string(shape)
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geomgui = salome.ImportComponentGUI("GEOM")
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shapeIcon = geomgui.getShapeTypeIcon(shapeIor)
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shapeStudyObject = self.editor.createItem(shapeStudyFolder,
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name=shapeName,
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IOR=shapeIor,
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icon=shapeIcon)
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entry = shapeStudyObject.GetID()
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return entry
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def removeFromStudy(self, shapeStudyEntry):
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"""
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This removes the specified entry from the study. Note that this
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operation does not destroy the underlying GEOM object, neither
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erase the drawing in the viewer.
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The underlying GEOM object is returned (so that it can be destroyed)
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"""
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study = self.editor.study
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studyId = study._get_StudyId()
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shape = self.getGeomObjectFromEntry(shapeStudyEntry)
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studyObject = IDToSObject(shapeStudyEntry)
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self.editor.removeItem(studyObject,True)
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return shape
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# ======================================================================
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# Helper functions to display/erase a shape in/from the viewer. The
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# shape must be previously put in the study and the study entry must
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# be known. Note also that these function works implicitly on the
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# active study (WARN: it does not ensure consistency with the
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# study associated to the studyEditor used to initiate this
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# object. It's up to you to be self-consistent (or to improve this
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# python source code).
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# ======================================================================
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def displayShapeByName(self, shapeName, color = None, fit=True):
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"""
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Display the geometrical shape whose name in the study is `shapeName`.
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@ -115,21 +187,28 @@ class GeomStudyTools:
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if geomObj:
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shape = geomObj._narrow(GEOM.GEOM_Object)
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if shape:
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return self.displayShapeByEntry(entry,color)
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return self.displayShapeByEntry(entry,color,fit)
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return False
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def displayShapeByEntry(self, entry, color = None):
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def displayShapeByEntry(self, shapeStudyEntry, color = None, fit=True):
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"""
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Display the geometrical shape whose entry is given by `entry`.
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Display the geometrical shape whose entry is given by
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`entry`. You should prefer use this function instead of the
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displayShapeByName which can have an unpredictible behavior in
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the case where several objects exist with the same name in the
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study.
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"""
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geomgui = salome.ImportComponentGUI("GEOM")
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geomgui.createAndDisplayGO(entry)
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geomgui.setDisplayMode(entry, DisplayMode)
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if fit:
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geomgui.createAndDisplayFitAllGO(shapeStudyEntry)
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else:
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geomgui.createAndDisplayGO(shapeStudyEntry)
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geomgui.setDisplayMode(shapeStudyEntry, DisplayMode)
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if color is not None:
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geomgui.setColor(entry, color[0], color[1], color[2])
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geomgui.setColor(shapeStudyEntry, color[0], color[1], color[2])
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return True
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def eraseShapeByEntry(self, entry):
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def eraseShapeByEntry(self, shapeStudyEntry):
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"""
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Erase the geometrical shape whose entry is given by
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`entry`. Please note that the shape is just erased from the
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@ -138,14 +217,37 @@ class GeomStudyTools:
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"""
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geomgui = salome.ImportComponentGUI("GEOM")
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eraseFromAllWindows=True
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geomgui.eraseGO(entry,eraseFromAllWindows)
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geomgui.eraseGO(shapeStudyEntry,eraseFromAllWindows)
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return True
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# ======================================================================
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# Helper functions for a complete suppression of a shape from the
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# SALOME session.
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# ======================================================================
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def deleteShape(self,shapeStudyEntry):
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"""
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This completly deletes a geom shape.
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WARNING: please be aware that to delete a geom object, you have
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three operations to perform:
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1. erase the shape from the viewers
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2. remove the entry from the study
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3. destroy the underlying geom object
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"""
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self.eraseShapeByEntry(shapeStudyEntry)
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shape = self.removeFromStudy(shapeStudyEntry)
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shape.Destroy()
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# ======================================================================
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# Helper functions for interactivity with the object browser
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# ======================================================================
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def getGeomObjectSelected(self):
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'''
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Returns the GEOM object currently selected in the objects browser.
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'''
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sobject, entry = helper.getSObjectSelected()
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sobject, entry = guihelper.getSObjectSelected()
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geomObject = self.getGeomObjectFromEntry(entry)
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return geomObject
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@ -187,8 +289,88 @@ def TEST_getGeomObjectSelected():
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myGeomObject = tool.getGeomObjectSelected()
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print myGeomObject
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def TEST_createAndDeleteShape():
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"""
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This test is a simple use case that illustrates how to create a
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GEOM shape in a SALOME session (create the GEOM object, put in in
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the study, and display the shape in a viewer) and delete a shape
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from a SALOME session (erase the shape from the viewer, delete the
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entry from the study, and finally destroy the underlying GEOM
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object).
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"""
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import salome
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salome.salome_init()
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study = salome.myStudy
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studyId = salome.myStudyId
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from salome.geom import geomtools
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geompy = geomtools.getGeompy(studyId)
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from salome.kernel.studyedit import getStudyEditor
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studyEditor = getStudyEditor(studyId)
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gst = geomtools.GeomStudyTools(studyEditor)
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# --------------------------------------------------
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# Create a first shape (GEOM object)
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radius = 5
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length = 100
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cylinder = geompy.MakeCylinderRH(radius, length)
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# Register the shape in the study, at the root of the GEOM
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# folder. A name must be specified. The register operation
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# (addShapeToStudy) returns an identifier of the entry in the study.
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cylinderName = "cyl.r%s.l%s"%(radius,length)
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cylinderStudyEntry = gst.addShapeToStudy(cylinder, cylinderName)
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# Display the registered shape in a viewer
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gst.displayShapeByEntry(cylinderStudyEntry)
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# --------------------------------------------------
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# A second shape
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radius = 10
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sphere = geompy.MakeSphereR(radius)
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sphereName = "sph.r%s"%radius
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sphereStudyEntry = gst.addShapeToStudy(sphere, sphereName)
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gst.displayShapeByEntry(sphereStudyEntry)
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# --------------------------------------------------
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# This new shape is stored in the study, but in a specific
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# sub-folder, and is displayed in the viewer with a specific
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# color.
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length = 20
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box = geompy.MakeBoxDXDYDZ(length,length,length)
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boxName = "box.l%s"%length
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folderName = "boxset"
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boxStudyEntry = gst.addShapeToStudy(box, boxName, folderName)
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gst.displayShapeByEntry(boxStudyEntry,PreviewColor)
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# --------------------------------------------------
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# In this example, we illustrate how to erase a shape (the sphere)
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# from the viewer. After this operation, the sphere is no longer
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# displayed but still exists in the study. You can then redisplay
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# it using the context menu of the SALOME object browser.
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gst.eraseShapeByEntry(sphereStudyEntry)
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# --------------------------------------------------
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# In this last example, we completly delete an object from the
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# SALOME session (erase from viewer, remove from study and finnaly
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# destroy the object). This is done by a simple call to
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# deleteShape().
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gst.deleteShape(cylinderStudyEntry)
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# --------------------------------------------------
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# At the end of the executioon of this test, you should have in
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# the SALOME session:
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# - the box, in a dedicated folder of the study, and displayed in the viewer
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# - the sphere, in the standard place of the study, and not displayed
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# If you comment the deleteShape line, you should see the cylinder
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# in the study and displayed in the viewer.
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if __name__ == "__main__":
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TEST_getGeomObjectSelected()
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#TEST_getGeomObjectSelected()
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TEST_createAndDeleteShape()
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