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ObjNode_setSelectable.C
Go to the documentation of this file.
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/*
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* Copyright (c) 2024
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* Side Effects Software Inc. All rights reserved.
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*
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* Redistribution and use of Houdini Development Kit samples in source and
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* binary forms, with or without modification, are permitted provided that the
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* following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. The name of Side Effects Software may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY SIDE EFFECTS SOFTWARE `AS IS' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL SIDE EFFECTS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*----------------------------------------------------------------------------
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*/
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//****************************************************************************
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//****************************************************************************
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//****************************************************************************
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//
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// WARNING
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//
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// This example is deprecated, and is largely replaced by the inlinecpp
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// Python module. Except for the ability to raise exceptions, you can
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// implement this example with the following Python code:
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//
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// inlinecpp.extendClass(
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// hou.ObjNode,
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// "node_methods",
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// includes="#include <UT/UT_UndoManager.h>",
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// function_sources=["""
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// void setSelectable(OBJ_Node *obj_node, int selectable)
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// {
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// if (!obj_node->canAccess(PRM_WRITE_OK))
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// return;
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//
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// UT_AutoUndoBlock undo_block("Setting selectable flag", ANYLEVEL);
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// obj_node->setPickable(selectable != 0);
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// }
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// """])
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//
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//****************************************************************************
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//****************************************************************************
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//****************************************************************************
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// This sample shows how to extend HOM using C++. It adds a
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// hou.ObjNode.setSelectable method that makes an object node selectable/
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// unselectable in the viewport.
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//
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// NOTE: The _hdk_sample_hom_extensions extension module must first be built.
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// _hdk_sample_hom_extensions.C, which is located in the same
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// directory as this file, contains the module source.
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//
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// You can build the extension module using hcustom:
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// hcustom -I <hfs_python_include_dir> -i $HOME/houdini20.5/pythonX.Ylibs _hdk_sample_hom_extensions.C
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//
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// where:
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// - "X" is the Python major version that Houdini is built against.
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// - "Y" is the Python minor version that Houdini is built against.
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// - <hfs_python_include_dir> is:
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// - $HFS/python/include/python2.Y for a Python 2 build on Linux.
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// - $HFS/python/include/python3.Ym for a Python 3 build on Linux.
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// - $HFS/Frameworks/Python.framework/Versions/Current/include/python2.Y for a Python 2 build on macOS.
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// - $HFS/Frameworks/Python.framework/Versions/Current/include/python3.Ym for a Python 3 build on macOS.
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// - %HFS%/pythonXY/include for a Python 2 or 3 build on Windows.
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//
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// For example, to build the module for a Python 2.7 build on Linux, do:
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// hcustom -I $HFS/python/include/python2.7 -i $HOME/houdini20.5/python2.7libs _hdk_sample_hom_extensions.C
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//
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// Another example, to build the module for a Python 3.7 build
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// on macOS, do:
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// hcustom -I $HFS/Frameworks/Python.framework/Versions/Current/include/python3.7m -i $HOME/houdini20.5/python3.7libs _hdk_sample_hom_extensions.C
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//
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// This file is needed for all HDK plugins:
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#include <
UT/UT_DSOVersion.h
>
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// We include this file only to get the forward declaration for
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// HOMextendLibrary(). See below for details.
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#include <
HOM/HOM_Module.h
>
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// This file contains functions that will run arbitrary Python code:
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#include <
PY/PY_Python.h
>
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void
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HOMextendLibrary
()
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{
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// When the hou module is first imported, Houdini will call functions named
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// HOMextendLibrary in HDK dso's. This function is declared in an extern
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// "C" in HOM_Module.h.
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// Run some Python code to add a method to the hou.ObjectNode class that
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// will call our custom function. We create a Python function
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// that takes in a hou.ObjNode instance. That function calls path()
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// on the instance to get the full path to the object node, and passes
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// that path and other arguments to the function in the _hom_extensions
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// module. Then that function is assigned to a method in hou.ObjNode
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// and the function's name is removed from the global dictionary.
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PYrunPythonStatementsAndExpectNoErrors
(
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"def _setSelectable(self, selectable):\n"
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" '''Make this node selectable/unselectable in the viewport\n"
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" and network editor.'''\n"
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" import _hdk_sample_hom_extensions\n"
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" _hdk_sample_hom_extensions.ObjNode_setSelectable(\n"
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" self.path(), selectable)\n"
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"__import__('hou').ObjNode.setSelectable = _setSelectable\n"
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"del _setSelectable\n"
);
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}
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PY_Python.h
HOM_Module.h
PYrunPythonStatementsAndExpectNoErrors
PY_API bool PYrunPythonStatementsAndExpectNoErrors(const char *python_code, const char *heading=NULL, PY_EvaluationContext *context=NULL, const char *as_file=nullptr)
HOMextendLibrary
void HOMextendLibrary()
Definition:
ObjNode_setSelectable.C:98
UT_DSOVersion.h
samples
HOM
ObjNode_setSelectable.C
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