FreeCAD中数据显示流程

济南友泉软件有限公司

二、 App::DocumentObject

三、 ViewProvider

四、 View3DInventorViewer

六、 TreeDockWidget中数据的显示流程

6.1 新建文档

6.2 新建文档对象

6.3 创建节点

6.4 TreeWidget中对象数据的显示

附录A: OIV测试CMakeLists

参考资料

Open Inventor

Open Inventor（以下简称OIV）是SGI公司使用C++编写的基于OpenGL的面向对象三维图形软件开发包。使用OIV开发包，程序员可以快速、简洁地开发出各种类型的交互式三维图形软件。OIV具有平台无关性，它可以在Microsoft Windows、Unix、Linux等多种操作系统中使用。OIV允许使用C、C++、Java、DotNet多种编程语言进行程序开发。经过多年的发展，OIV已经基本上成为面向对象的3D图形开发“事实上”的工业标准。广泛地应用于机械工程设计与仿真、医学和科学图像、地理科学、石油钻探、虚拟现实、科学数据可视化等领域。

OIV目前主要由三家公司负责维护，相应的有三个主要的版本。SGI最早提出并开发OIV的UNIX版本；TGS公司最早将OIV由Unix系统移植到Microsoft Windows下的公司；SIM公司开发的Coin3D OIV可以同时在UNIX和Microsoft Windows下使用，Coin3D OIV免费版本的使用协议采用的是GPL协议，但如果要在商业软件使用Coin3D，商业用户需要每年支付一笔很少的开发费用。

目前，FreeCAD使用的是Coin3D OIV这个版本。

OIV的原理与概念

由于OIV采用C++面向对象的编程思想进行设计，因此相对于直接调用OpenGL C API来说，使用OIV开发图形图像软件将会更加简单而且开发效率更高。

使用OIV编写应用程序比较简单，其要点是根据需要把景物节点组装成景物（Scene），并设置景物节点的事件及其响应。

景物与节点

OIV使用层次化的树状结构来存储模型数据，其中的节点称之为景物节点(SoNode及其子类)；而景物(Scene)则是由若干景物节点组成的；景物图（Scene）则指场景中景物的集合。

SoCube	立方体

行为

行为（SoAction及其子类）主要用来渲染景物。

SoGLRenderAction	应用GL图形库对景物图进行渲染
SoGetBoundingBoxAction	在景物途中计算一个对象的三维包围盒
SoWriteAction	将景物图写入文件
SoHandleEventAction	处理事件
SoRayPickAction	沿直线选择对象
SoCallbackAction	调用回调函数

事件

事件（SoEvent及其子类）用来表示键盘、鼠标等外部设备对景物的操作。

SoButtonEvent
SoLocation2Event
SoMotion3Event

传感器

传感器(SoSensor及其子类)用于检测各类事件，当有事件发生时便会调用注册的对应回调函数。

引擎

引擎（SoEngine及其子类）用于景物运动模拟，适合于物体运动、机械结构关节点等应用场景。

OIV内存管理

虚基类SoBase不仅提供了类型管理功能。而且实现了基于引用计数的内存管理。每个对象都有一个引用计数的变量，只要它被使用过一次，引用计数就加1，不再使用时，引用计数就减1，如果引用计数变成0，那么这个对象就自动被删除。

代码示例

通过下面的代码可以直观地了解OIV程序开发的流程，

#include <Inventor/Qt/SoQt.h>
#include <Inventor/Qt/viewers/SoQtExaminerViewer.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoCube.h>
#include <Inventor/nodes/SoMaterial.h>
int main(int, char **argv)
{
    //初始化Inventor
    QWidget *myWindow = SoQt::init(argv[0]);
    //创建观察器
    SoQtExaminerViewer *myViewer = new SoQtExaminerViewer(myWindow);
    //创建场景
    SoSeparator *root = new SoSeparator;
    SoMaterial *myMaterial = new SoMaterial;
    myMaterial->diffuseColor.setValue(1.0, 0.0, 0.0);//红色
    root->addChild(myMaterial);
    root->addChild(new SoCube);//增加上一个立方体
    //观察器和场景相关联
    myViewer->setSceneGraph(root);
    //显示主窗口
    myViewer->show();
    SoQt::show(myWindow);
    // 主循环
    SoQt::mainLoop();
    return 0;
}

程序运行结果如下：

图片[1]-FreeCAD中数据显示流程-卡核

App::DocumentObject

App::Document采用层次化的树状结构存储文档数据，每个文档节点称之为文档对象(App::DocumentObjectObject)。

App::DocumentObjectObject包含描述对象的数据，提供了对象数据持久化的功能，同时采用Boost库中信号-槽机制用于管理数据更新操作的相应。

ViewProvider

ViewProvider定义了各种数据在View3Dinventor（派生于MDIView）、TreeView中显示的接口。对于View3Dinventor，主要完成模型数据转换成OIV渲染数据结构的功能；对于TreeView，主要定义了节点图标、双击响应等方面的接口。

View3DInventorViewer

View3DInventor通过其内部View3DInventorViewer来完成在Qt窗口内使用OIV渲染几何文档数据。

设置景物图

为了显示模型，仅需要调用setSceneGraph()指定需要显示的所有景物的根节点。

void View3DInventorViewer::setSceneGraph(SoNode *root);

对象数据的3D显示流程

本节以Part模块中Part::Box类型文档对象来分析文档对象的创建、显示过程。

命令触发

当在点击菜单[Part/Primitives/Cube]或者直接在工具栏上点击Cube图标，便会调用CmdPartBox::activated()函数，

void CmdPartBox::activated(int iMsg)
{
    Q_UNUSED(iMsg);
    QString cmd;
    cmd = qApp->translate("CmdPartBox","Cube");
    openCommand((const char*)cmd.toUtf8());
    runCommand(Doc,"App.ActiveDocument.addObject(\\"Part::Box\\",\\"Box\\")");
    cmd = QString::fromLatin1("App.ActiveDocument.ActiveObject.Label = \\"%1\\"")
        .arg(qApp->translate("CmdPartBox","Cube"));
    runCommand(Doc,cmd.toUtf8());
    commitCommand();
    updateActive();
    runCommand(Gui, "Gui.SendMsgToActiveView(\\"ViewFit\\")");
}

在这个函数中，会调用App::Document::addObject()来创建Part::Box类型的文档对象。

创建对象

在App::Document::addObject()中，会根据传入的对象文档类型创建对象文件，然后分别触发signalNewObject、signalActivatedObject等信号。

boost::signals2::signal<void(const App::DocumentObject&)> App::Document::signalNewObject;
boost::signals2::signal<void(const App::DocumentObject&)> App::Document:: signalActivatedObject;
DocumentObject * Document::addObject(const char* sType, const char* pObjectName, bool isNew)
{
    Base::BaseClass* base = static_cast<Base::BaseClass*>(Base::Type::createInstanceByName(sType,true));
    string ObjectName;
    if (!base)
        return 0;
    if (!base->getTypeId().isDerivedFrom(App::DocumentObject::getClassTypeId())) {
        delete base;
        std::stringstream str;
        str << "'" << sType << "' is not a document object type";
        throw Base::TypeError(str.str());
    }
    App::DocumentObject* pcObject = static_cast<App::DocumentObject*>(base);
    pcObject->setDocument(this);
    // do no transactions if we do a rollback!
    if (!d->rollback) {
        // Undo stuff
        if (d->activeUndoTransaction)
            d->activeUndoTransaction->addObjectDel(pcObject);
    }
    // get Unique name
    if (pObjectName && pObjectName[0] != '\\0')
        ObjectName = getUniqueObjectName(pObjectName);
    else
        ObjectName = getUniqueObjectName(sType);
    d->activeObject = pcObject;
    // insert in the name map
    d->objectMap[ObjectName] = pcObject;
    // cache the pointer to the name string in the Object (for performance of DocumentObject::getNameInDocument())
    pcObject->pcNameInDocument = &(d->objectMap.find(ObjectName)->first);
    // insert in the vector
    d->objectArray.push_back(pcObject);
    // insert in the adjacence list and reference through the ConectionMap
    //_DepConMap[pcObject] = add_vertex(_DepList);
    // If we are restoring, don't set the Label object now; it will be restored later. This is to avoid potential duplicate
    // label conflicts later.
    if (!d->StatusBits.test(Restoring))
        pcObject->Label.setValue( ObjectName );
    // Call the object-specific initialization
    if (!d->undoing && !d->rollback && isNew) {
        pcObject->setupObject ();
    }
    // mark the object as new (i.e. set status bit 2) and send the signal
    pcObject->setStatus(ObjectStatus::New, true);
    signalNewObject(*pcObject);
    // do no transactions if we do a rollback!
    if (!d->rollback && d->activeUndoTransaction) {
        signalTransactionAppend(*pcObject, d->activeUndoTransaction);
    }
    signalActivatedObject(*pcObject);
    // return the Object
    return pcObject;
}

信号-槽的关联

在Gui::Document中，可以看到信号signalNewObject关联到了Gui::Document::slotNewObject，即

Document::Document(App::Document* pcDocument,Application * app)
{
    d = new DocumentP;

    d->_iWinCount = 1;

    // new instance

    d->_iDocId = (++_iDocCount);

    d->_isClosing = false;

    d->_isModified = false;

    d->_pcAppWnd = app;

    d->_pcDocument = pcDocument;

    d->_editViewProvider = 0;

    // Setup the connections

    d->connectNewObject = pcDocument->signalNewObject.connect

        (boost::bind(&Gui::Document::slotNewObject, this, _1));

    d->connectDelObject = pcDocument->signalDeletedObject.connect

        (boost::bind(&Gui::Document::slotDeletedObject, this, _1));

    d->connectCngObject = pcDocument->signalChangedObject.connect

        (boost::bind(&Gui::Document::slotChangedObject, this, _1, _2));

    d->connectRenObject = pcDocument->signalRelabelObject.connect

        (boost::bind(&Gui::Document::slotRelabelObject, this, _1));

    d->connectActObject = pcDocument->signalActivatedObject.connect

        (boost::bind(&Gui::Document::slotActivatedObject, this, _1));

    d->connectActObjectBlocker = boost::signals2::shared_connection_block

        (d->connectActObject, false);

    d->connectSaveDocument = pcDocument->signalSaveDocument.connect

        (boost::bind(&Gui::Document::Save, this, _1));

    d->connectRestDocument = pcDocument->signalRestoreDocument.connect

        (boost::bind(&Gui::Document::Restore, this, _1));

    d->connectStartLoadDocument = App::GetApplication().signalStartRestoreDocument.connect

        (boost::bind(&Gui::Document::slotStartRestoreDocument, this, _1));

    d->connectFinishLoadDocument = App::GetApplication().signalFinishRestoreDocument.connect

        (boost::bind(&Gui::Document::slotFinishRestoreDocument, this, _1));

    d->connectExportObjects = pcDocument->signalExportViewObjects.connect

        (boost::bind(&Gui::Document::exportObjects, this, _1, _2));

    d->connectImportObjects = pcDocument->signalImportViewObjects.connect

        (boost::bind(&Gui::Document::importObjects, this, _1, _2, _3));

    d->connectUndoDocument = pcDocument->signalUndo.connect

        (boost::bind(&Gui::Document::slotUndoDocument, this, _1));

    d->connectRedoDocument = pcDocument->signalRedo.connect

        (boost::bind(&Gui::Document::slotRedoDocument, this, _1));

    d->connectTransactionAppend = pcDocument->signalTransactionAppend.connect

        (boost::bind(&Gui::Document::slotTransactionAppend, this, _1, _2));

    d->connectTransactionRemove = pcDocument->signalTransactionRemove.connect

        (boost::bind(&Gui::Document::slotTransactionRemove, this, _1, _2));

    // pointer to the python class

    // NOTE: As this Python object doesn't get returned to the interpreter we

    // mustn't increment it (Werner Jan-12-2006)

    _pcDocPy = new Gui::DocumentPy(this);

    if (App::GetApplication().GetParameterGroupByPath

        ("User parameter:BaseApp/Preferences/Document")->GetBool("UsingUndo",true)){

        d->_pcDocument->setUndoMode(1);

        // set the maximum stack size

        d->_pcDocument->setMaxUndoStackSize(App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Document")->GetInt("MaxUndoSize",20));

    }

}

渲染对象

在Document::slotNewObject()函数中，主要完成以下工作：

根绝文档对象obj关联的ViewProvider类型，创建派生于ViewProviderDocumentObject的pcProvider，
pcProvider调用attach()关联文档对象obj
将pcProvider添加到所有ViewInventor3D视图中进行显示

void Document::slotNewObject(const App::DocumentObject& Obj)

{

    ViewProviderDocumentObject* pcProvider = static_cast<ViewProviderDocumentObject*>(getViewProvider(&Obj));

    if (!pcProvider) {

        //Base::Console().Log("Document::slotNewObject() called\\n");

        std::string cName = Obj.getViewProviderName();

        if (cName.empty()) {

            // handle document object with no view provider specified

            Base::Console().Log("%s has no view provider specified\\n", Obj.getTypeId().getName());

            return;

        }

        setModified(true);

        Base::BaseClass* base = static_cast<Base::BaseClass*>(Base::Type::createInstanceByName(cName.c_str(),true));

        if (base) {

            // type not derived from ViewProviderDocumentObject!!!

            assert(base->getTypeId().isDerivedFrom(Gui::ViewProviderDocumentObject::getClassTypeId()));

            pcProvider = static_cast<ViewProviderDocumentObject*>(base);

            d->_ViewProviderMap[&Obj] = pcProvider;

            try {

                // if successfully created set the right name and calculate the view

                //FIXME: Consider to change argument of attach() to const pointer

                pcProvider->attach(const_cast<App::DocumentObject*>(&Obj));

                pcProvider->updateView();

                pcProvider->setActiveMode();

            }

            catch(const Base::MemoryException& e){

                Base::Console().Error("Memory exception in '%s' thrown: %s\\n",Obj.getNameInDocument(),e.what());

            }

            catch(Base::Exception &e){

                e.ReportException();

            }

#ifndef FC_DEBUG

            catch(...){

                Base::Console().Error("App::Document::_RecomputeFeature(): Unknown exception in Feature \\"%s\\" thrown\\n",Obj.getNameInDocument());

            }

#endif

        }

        else {

            Base::Console().Warning("Gui::Document::slotNewObject() no view provider for the object %s found\\n",cName.c_str());

        }

    }

    if (pcProvider) {

        std::list<Gui::BaseView*>::iterator vIt;

        // cycling to all views of the document

        for (vIt = d->baseViews.begin();vIt != d->baseViews.end();++vIt) {

            View3DInventor *activeView = dynamic_cast<View3DInventor *>(*vIt);

            if (activeView)

                activeView->getViewer()->addViewProvider(pcProvider);

        }

        // adding to the tree

        signalNewObject(*pcProvider);

        // it is possible that a new viewprovider already claims children

        handleChildren3D(pcProvider);

    }

}

运行结果：

图片[2]-FreeCAD中数据显示流程-卡核

TreeDockWidget中数据的显示流程

TreeDockWidget通过内嵌的TreeWidget类型的对象来层次化地显示文档对象。

新建文档

在TreeWidget的构造函数中，关联了新建文档等信号，可以看到App::Application::signalNewDocument信号关联到了Gui::TreeWidget::slotNewDocument。

TreeWidget::TreeWidget(QWidget* parent)

    : QTreeWidget(parent), contextItem(0), fromOutside(false)

{

    this->setDragEnabled(true);

    this->setAcceptDrops(true);

    this->setDropIndicatorShown(false);

    this->setRootIsDecorated(false);

    this->createGroupAction = new QAction(this);

    this->createGroupAction->setText(tr("Create group..."));

    this->createGroupAction->setStatusTip(tr("Create a group"));

    connect(this->createGroupAction, SIGNAL(triggered()),

            this, SLOT(onCreateGroup()));

    this->relabelObjectAction = new QAction(this);

    this->relabelObjectAction->setText(tr("Rename"));

    this->relabelObjectAction->setStatusTip(tr("Rename object"));

#ifndef Q_OS_MAC

    this->relabelObjectAction->setShortcut(Qt::Key_F2);

#endif

    connect(this->relabelObjectAction, SIGNAL(triggered()),

            this, SLOT(onRelabelObject()));

    this->finishEditingAction = new QAction(this);

    this->finishEditingAction->setText(tr("Finish editing"));

    this->finishEditingAction->setStatusTip(tr("Finish editing object"));

    connect(this->finishEditingAction, SIGNAL(triggered()),

            this, SLOT(onFinishEditing()));

    this->skipRecomputeAction = new QAction(this);

    this->skipRecomputeAction->setCheckable(true);

    this->skipRecomputeAction->setText(tr("Skip recomputes"));

    this->skipRecomputeAction->setStatusTip(tr("Enable or disable recomputations of document"));

    connect(this->skipRecomputeAction, SIGNAL(toggled(bool)),

            this, SLOT(onSkipRecompute(bool)));

    this->markRecomputeAction = new QAction(this);

    this->markRecomputeAction->setText(tr("Mark to recompute"));

    this->markRecomputeAction->setStatusTip(tr("Mark this object to be recomputed"));

    connect(this->markRecomputeAction, SIGNAL(triggered()),

            this, SLOT(onMarkRecompute()));

    this->searchObjectsAction = new QAction(this);

    this->searchObjectsAction->setText(tr("Search..."));

    this->searchObjectsAction->setStatusTip(tr("Search for objects"));

    connect(this->searchObjectsAction, SIGNAL(triggered()),

            this, SLOT(onSearchObjects()));

    // Setup connections

    connectNewDocument = Application::Instance->signalNewDocument.connect(boost::bind(&TreeWidget::slotNewDocument, this, _1));

    connectDelDocument = Application::Instance->signalDeleteDocument.connect(boost::bind(&TreeWidget::slotDeleteDocument, this, _1));

    connectRenDocument = Application::Instance->signalRenameDocument.connect(boost::bind(&TreeWidget::slotRenameDocument, this, _1));

    connectActDocument = Application::Instance->signalActiveDocument.connect(boost::bind(&TreeWidget::slotActiveDocument, this, _1));

    connectRelDocument = Application::Instance->signalRelabelDocument.connect(boost::bind(&TreeWidget::slotRelabelDocument, this, _1));

    QStringList labels;

    labels << tr("Labels & Attributes");

    this->setHeaderLabels(labels);

    // make sure to show a horizontal scrollbar if needed

#if QT_VERSION >= 0x050000

    this->header()->setSectionResizeMode(0, QHeaderView::ResizeToContents);

#else

    this->header()->setResizeMode(0, QHeaderView::ResizeToContents);

#endif

    this->header()->setStretchLastSection(false);

    // Add the first main label

    this->rootItem = new QTreeWidgetItem(this);

    this->rootItem->setText(0, tr("Application"));

    this->rootItem->setFlags(Qt::ItemIsEnabled);

    this->expandItem(this->rootItem);

    this->setSelectionMode(QAbstractItemView::ExtendedSelection);

#if QT_VERSION >= 0x040200

    // causes unexpected drop events (possibly only with Qt4.1.x)

    this->setMouseTracking(true); // needed for itemEntered() to work

#endif

    this->statusTimer = new QTimer(this);

    connect(this->statusTimer, SIGNAL(timeout()),

            this, SLOT(onTestStatus()));

    connect(this, SIGNAL(itemEntered(QTreeWidgetItem*, int)),

            this, SLOT(onItemEntered(QTreeWidgetItem*)));

    connect(this, SIGNAL(itemCollapsed(QTreeWidgetItem*)),

            this, SLOT(onItemCollapsed(QTreeWidgetItem*)));

    connect(this, SIGNAL(itemExpanded(QTreeWidgetItem*)),

            this, SLOT(onItemExpanded(QTreeWidgetItem*)));

    connect(this, SIGNAL(itemSelectionChanged()),

            this, SLOT(onItemSelectionChanged()));

    this->statusTimer->setSingleShot(true);

    this->statusTimer->start(300);

    documentPixmap = new QPixmap(Gui::BitmapFactory().pixmap("Document"));

}

新建文档对象

当新建文档时，调用TreeWidget:: slotNewDocument()完成了DocumentItem类型文档项的创建，对应文档模型的根节点。

void TreeWidget::slotNewDocument(const Gui::Document& Doc)
{
    DocumentItem* item = new DocumentItem(&Doc, this->rootItem);

    this->expandItem(item);

    item->setIcon(0, *documentPixmap);

    item->setText(0, QString::fromUtf8(Doc.getDocument()->Label.getValue()));

    DocumentMap[ &Doc ] = item;

}

而在DocumentItem的构造函数中，完成了新建对象文档事件的关联。可以看到，Gui::Document::signalNewObject关联到了Gui::DocumentItem::slotNewObject

DocumentItem::DocumentItem(const Gui::Document* doc, QTreeWidgetItem * parent)

    : QTreeWidgetItem(parent, TreeWidget::DocumentType), pDocument(doc)

{

    // Setup connections

    connectNewObject = doc->signalNewObject.connect(boost::bind(&DocumentItem::slotNewObject, this, _1));

    connectDelObject = doc->signalDeletedObject.connect(boost::bind(&DocumentItem::slotDeleteObject, this, _1));

    connectChgObject = doc->signalChangedObject.connect(boost::bind(&DocumentItem::slotChangeObject, this, _1));

    connectRenObject = doc->signalRelabelObject.connect(boost::bind(&DocumentItem::slotRenameObject, this, _1));

    connectActObject = doc->signalActivatedObject.connect(boost::bind(&DocumentItem::slotActiveObject, this, _1));

    connectEdtObject = doc->signalInEdit.connect(boost::bind(&DocumentItem::slotInEdit, this, _1));

    connectResObject = doc->signalResetEdit.connect(boost::bind(&DocumentItem::slotResetEdit, this, _1));

    connectHltObject = doc->signalHighlightObject.connect(boost::bind(&DocumentItem::slotHighlightObject, this, _1,_2,_3));

    connectExpObject = doc->signalExpandObject.connect(boost::bind(&DocumentItem::slotExpandObject, this, _1,_2));

    connectScrObject = doc->signalScrollToObject.connect(boost::bind(&DocumentItem::slotScrollToObject, this, _1));

    setFlags(Qt::ItemIsEnabled/*|Qt::ItemIsEditable*/);

}

创建节点

在DocumentItem::slotNewObject中通过调用createNewItem创建树节点。

void DocumentItem::slotNewObject(const Gui::ViewProviderDocumentObject& obj) {

    createNewItem(obj);

}

TreeWidget中对象数据的显示

结合前述文档对象的创建过程可以看出，当App::Document::addObject()创建完成文档对象之后，触发App::Document::signalNewObject事件，由于此事件关联到了Gui::DocumentItem::slotNewObject槽函数，会调用createNewItem函数在TreeWidget创建对应的树节点。

boost::signals2::signal<void(const App::DocumentObject&)> App::Document::signalNewObject;

bool DocumentItem::createNewItem(const Gui::ViewProviderDocumentObject& obj,

            QTreeWidgetItem *parent, int index, DocumentObjectItemsPtr ptrs)

{

    const char *name;

    if (!obj.showInTree() || !(name=obj.getObject()->getNameInDocument()))

        return false;

    if (!ptrs) {

        auto &items = ObjectMap[name];

        if (!items) {

            items.reset(new DocumentObjectItems);

        }

        else if(items->size() && parent==NULL) {

            Base::Console().Warning("DocumentItem::slotNewObject: Cannot add view provider twice.\\n");

            return false;

        }

        ptrs = items;

    }

    std::string displayName = obj.getObject()->Label.getValue();

    DocumentObjectItem* item = new DocumentObjectItem(

        const_cast<Gui::ViewProviderDocumentObject*>(&obj), ptrs);

    if (!parent)

        parent = this;

    if (index<0)

        parent->addChild(item);

    else

        parent->insertChild(index,item);

    // Couldn't be added and thus don't continue populating it

    // and delete it again

    if (!item->parent()) {

        delete item;

    }

    else {

        item->setIcon(0, obj.getIcon());

        item->setText(0, QString::fromUtf8(displayName.c_str()));

        populateItem(item);

    }

    return true;

}

附录A: OIV测试CMakeLists

#add_defintions(-D_FC_GUI_ENABLED_)

#add_defintions(-DFREECADMAINPY)

######################## OIV ########################

SET(OIV_SRCS

    Test_OIV.cpp

)

include_directories(

    ${COIN3D_INCLUDE_DIRS}

)

SET(OIV_LIBS

    ${Boost_LIBRARIES}

    ${COIN3D_LIBRARIES}

    ${SOQT_LIBRARIE}

    ${OPENGL_gl_LIBRARY}

    FreeCADGui

)

if (BUILD_QT5)

    include_directories(

        ${Qt5Core_INCLUDE_DIRS}

        ${Qt5Widgets_INCLUDE_DIRS}

        ${Qt5OpenGL_INCLUDE_DIRS}

        ${Qt5PrintSupport_INCLUDE_DIRS}

        ${Qt5Svg_INCLUDE_DIRS}

        ${Qt5Network_INCLUDE_DIRS}

        ${Qt5UiTools_INCLUDE_DIRS}

    )

    list(APPEND OIV_LIBS

        ${Qt5Core_LIBRARIES}

        ${Qt5Widgets_LIBRARIES}

        ${Qt5OpenGL_LIBRARIES}

        ${Qt5PrintSupport_LIBRARIES}

        ${Qt5Svg_LIBRARIES}

        ${Qt5Network_LIBRARIES}

        ${Qt5UiTools_LIBRARIES}

    )

else()

    include_directories(

        ${QT_INCLUDE_DIR}

    )

    list(APPEND OIV_LIBS

        ${QT_LIBRARIES}

        ${QT_QTUITOOLS_LIBRARY}

    )

endif()

add_definitions(-D SOQT_DLL)

add_executable(Test_OIV WIN32 ${OIV_SRCS})

target_link_libraries(Test_OIV  ${OIV_LIBS})

SET_BIN_DIR(Test_OIV Test_OIV)

if(WIN32)

    INSTALL(TARGETS Test_OIV

        RUNTIME DESTINATION bin

        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}

    )

elseif(APPLE AND NOT BUILD_WITH_CONDA)

    INSTALL(TARGETS Test_OIV

    RUNTIME DESTINATION MacOS

        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}

    )

else()

    INSTALL(TARGETS Test_OIV

        RUNTIME DESTINATION bin

    )

endif()

参考资料

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FreeCAD源码分析综合
# FreeCAD开发教程