辅助--Inspector

辅助–Inspector

1.Introduction

This manual explains how to use the Inspector.

1.1.Overview

Inspector is a Qt-based library that provides functionality to interactively inspect low-level content of the OCAF data model, OCCT viewer and Modeling Data. This component is aimed to assist the developers of OCCT-based applications to debug the problematic situations that occur in their applications.

Inspector has a plugin-oriented architecture. The current release contains the following plugins:

Each plugin implements logic of a corresponding OCCT component.

Each of the listed plugins is embedded in the common framework, thus it is possible to manage, which plugins should be loaded by the Inspector, and to extend their number by implementing a new plugin.

1.2.Getting started

There are two launch modes:

1. Launch TInspectorEXE executable sample. For more details see TInspectorEXE section;
2. Launch DRAW, load plugin INSPECTOR, and use tinspector command. For more details, see Launch in DRAW Test Harness section.

Note. If you have no Inspector library in your build directory, make sure that OCCT is compiled with BUILD_Inspector option ON. For more details see Build procedure.

2.Inspector Plugins

2.1.Overview

Inspector consists of the following components:

• buttons to activate the corresponding plugin;
• view area to visualize the plugin content.

2.2.DFBrowser Plugin

2.2.1.Overview

This plugin visualizes the content of TDocStd_Application in a tree view. It shows application documents, the hierarchy of TDF_Labels, the content of TDF_Attributes and interconnection between attributes (e.g. references). Additionally there is a 3D view to visualize TopoDS_Shape elements stored in the document.

2.2.2.Elements

2.2.3.OCAF tree view

Each OCAF element has own tree view item:

Additional information about TDF_Attributes:

Custom color of items:

Context pop-up menu:

2.2.4.Property Panel

Property panel is used to display the result of TDF_Attribute::Dump() or TDF_Label::Dump() of the selected tree view item. The information is shown in one table.

2.2.5.Property Panel (custom)

Property panel (custom) is used to display the content of Label or Attribute tree view items or Search result view. The information is usually shown in one or several tables.

TDF_Attribute has the following content in the Property Panel:

Type	Description	Content
TDF_Label	a table of [entry or attribute name, value]
TDocStd_Owner, Simple type attributes, List type attributes	a table of [method name, value]
TDataStd_BooleanArray, TDataStd_ByteArray, other Array type attributes	2 controls: - a table of [array bound, value], - a table of [method name, value]
TDataStd_TreeNode	2 controls: - a table of [Tree ID, value] (visible only if Tree ID() != ID() ), - a tree view of tree nodes starting from Root() of the tree node. The current tree node has dark blue text.
TDataStd_NamedData	tab bar of attribute elements, each tab has a table of [name, value]
TNaming_UsedShapes	a table of all shapes handled by the framework
TNaming_NamedShape	2 controls: - a table of [method name, value] including CurrentShape/OriginalShape methods result of TNaming_Tools, - an evolution table. Tables contain buttons for TopoDS_Shape export.
TNaming_Naming	2 controls: - a table of TNaming_Name values, - a table of [method name, value]

2.2.6.Dump view

Dump view shows the result of TDF_Attribute::Dump() or TDF_Label::Dump() of the selected tree view item.

2.2.7.3D view

3D View visualizes TopoDS_Shape elements of OCAF attribute via AIS facilities.

DFBrowser creates two kinds of presentations depending on the selection place:

Kind	Source object	Visualization properties	View
Main presentation	Tree view item: TPrsStd_AISPresentation, TNaming_NamedShape, TNaming_Naming	Color: a default color for shape type of the current TopoDS_Shape.
Additional presentation	References in Property panel	Color: white

2.2.8.Tree Navigation

Tree Navigation shows a path to the item selected in the tree view. The path is a sequence of label entries and attribute type names. Each element in the path is selectable - simply click on it to select the corresponding tree view item.

Navigation control has buttons to go to the previous and the next selected tree view items.

Update Button

Update button synchronizes content of tree view to the current content of OCAF document that could be modified outside.

Search

The user can search OCAF element by typing:

• TDF_Label entry,
• TDF_Attribute name,
• TDataStd_Name and TDataStd_Comment attributes value.

As soon as the user confirms the typed criteria, the Property panel is filled by all satisfied values. The user can click a value to highlight the corresponding tree view item. By double click the item will be selected.

2.3.Elements cooperation

2.3.1.Tree item selection

Selection of tree view item updates content of the following controls:

• Navigation line;
• Property Panel;
• 3D View (if it is possible to create an interactive presentation);
• Dump View.

2.3.2.Property Panel (custom) item selection

If the property panel (custom) shows content of TDF_Label:

• selection of the table row highlights the corresponding item in the tree view,
• double click on the table row selects this item in the tree view.

If the property panel (custom) shows content of TDF_Attribute that has reference to another attribute, selection of this reference:

• highlights the referenced item in the tree view,
• displays additional presentation in the 3D view if it can be created.

Attributes having references:

2.3.3.TopoDS_Shape export

Property panel of TNaming_NamedShape attribute has controls to export TopoDS_Shape to:

• BREP. Save file dialog is open to enter the result file name,
• ShapeView plugin. The dialog for exporting element to ShapeView allows activating this plugin immediately.

2.4.VInspector Plugin

2.4.1.Overview

This plugin visualizes interactive objects displayed in AIS_InteractiveContext in a tree view with computed selection components for each presentation. It shows the selected elements in the context and allows selecting these elements.

2.4.2.Elements

2.4.3.Presentations tree view

This view shows presentations and selection computed on them. Also, the view has columns with information about the state of visualization elements.

VInspector tree items.

Custom color of tree view items:

Context popup menu in tree view:

2.4.4.Update

This button synchronizes the plugin content with the current state of AIS_InteractiveContext and updates the presence of items and their current selection.

2.4.5.Elements cooperation

VInspector marks the presentations currently selected in AIS_InteractiveContext with a blue background in tree items. Use Update button to synchronize VInspector selected items state to the context.

It is also possible to perform selection in the context using “Selection controls” VInspector feature. However, this operation should be performed carefully as it clears the current selection in AIS_InteractiveContext.

Selection change:

2.4.6.VInspector tree view columns

Use context pop-up menu on the tree view header to select, which columns should be displayed.

Use the setting Lights (position, color) in the view.

2.4.7.VInspector property panel

Property panel shows the result of AIS_InteractiveContext::Dump() or AIS_InteractiveObject::Dump().

2.5.ShapeView Plugin

2.5.1.Overview

This plugin visualizes content of TopoDS_Shape in a tree view.

2.5.2.Property panel

Property panel shows properties for TopoDS_Shape based on DumpJson.

2.5.3.Elements

2.5.4.TopoDS_Shape View

The view elements are TopoDS_Shape objects. The shape is exploded into sub-shapes using TopoDS_Iterator of the TopoDS_Shape. Children sub-shapes are presented in the view as children of the initial shape. By iterating recursively through all shapes we obtain a tree view of items shown in the ShapeView.

The columns of the View show some information about TopoDS_Shape of the item. The first column allows changing the visibility of the item shape in the 3D view.

Context pop-up menu in tree view:

2.5.5.Elements cooperation

Selection of one or several items in TopoDS_Shape View creates its AIS_Shape presentation and displays it in the 3D View.

2.5.6.ShapeView tree view columns

Use context pop-up menu on the tree view header to select, which columns should be displayed.

2.5.7.MessageView Plugin

MessageView plugin is used to display content of Message_Report.

2.5.8.Message report tree view

Message report tree view shows the content of the Message_Report.

Context pop-up menu in message report tree view:

2.5.9.3D View

3D View shows the selected item (TopoDS_Shape) in message report tree view.

2.5.10.Dump panel

Shows Dump() information of the selected item if the item has Dump().

2.5.11.Property panel (custom)

Shows the table for WallClock Metric statistic option.

2.5.12.Elements

2.6.Common controls

2.6.1.Tree View

This control shows presentation hierarchy of the investigated OCCT element, e.g. TDocStd_Application for DFBrowser, see Overview. The first column contains the name, other columns are informative.

The tree view has a context menu with plugin-specific actions.

2.6.2.Tree View preferences

It is possible to define visibility and width of columns. This option is available in a view that contains more than one column, e.g. VInspector tree view columns and ShapeView tree view columns.

2.7.3D View

2.7.1.Overview

This control for OCCT 3D viewer creates visualization view components and allows performing some user actions in the view.

2.7.2.Elements

3D View contains the following elements:

Context popup menu:

2.7.3.3D View preferences.

View preferences store the current view orientation.

2.7.4.Preferences context menu

Context menu contains:

The following controls have store/restore preferences:

2.8.Getting Started

2.8.1.TInspectorEXE sample

This sample allows trying Inspector functionality.

Use inspector.bat script file placed in a binary directory of OCCT to launch it.

This script accepts the names of plugin’s DLL that should be loaded. By default it loads all plugins described above.

Click on the Open button shows the dialog to select a file.

Depending on the active plugin, it is possible to select the following files in the dialog:

• DFBRowser: OCAF document or STEP files;
• VInspector: BREP files;
• ShapeView: BREP files.

Click the file name in the proposed directory and enter it manually or using Browse button.

By default, TInspectorEXE opens the following files for plugins:

These files are found relatively to CSF_OCCTDataPath.

2.8.2.TInspectorEXE preferences

The application stores recently loaded files. On the application start, the last file is activated. Open file dialog contains recently loaded files. Selection of a new file updates the container of recently loaded files and rewrites preferences.

Source code of TIspectorEXE is a good sample for using the Inspector in a custom application.

2.8.3.How to launch the Inspector in DRAW Test Harness

TKToolsDraw plugin provides DRAW commands for Qt tools. Use INSPECTOR parameter of pload command to download the commands of this library. It contains tinspector command to start Inspector under DRAW. See more detailed description of the tinspector command.

The simple code to start Inspector with all plugins loaded:

pload INSPECTOR
tinspector

This command does the following:

• all available Plugins are presented in the Inspector. These are DFBrowser, VInspector, ShapeView and MessageView;
• DFBrowser is the active plugin;
• OCAF tree is empty.

After this, we should create objects in DRAW and update tinspector. The examples of using Inspector in DRAW can be found in OCCT source directory /tests/tools.

2.8.4.How to use the Inspector in a custom application

The example of using the Inspector in a custom application is presented in OCCT qt sample - FuncDemo. For building qt samples, switch on BUILD_SAMPLES_QT variable in Configuration process.

In general, the following steps should be taken:

• Set dependencies to OCCT and Qt in the application (Header and Link);
• Create an instance of TInspector_Communicator;
• Register the plugins of interest in the communicator by DLL library name;
• Initialize the communicator with objects that will be investigated;
• Set visible true for the communicator.

Here is an example of C++ implementation:

#include <inspector/TInspector_Communicator.hxx>
static TInspector_Communicator* MyTCommunicator;
void CreateInspector()
{
  NCollection_List<Handle(Standard_Transient)> aParameters;
  //... append parameters in the list
  if (!MyTCommunicator)
  {
    MyTCommunicator = new TInspector_Communicator();
    MyTCommunicator->RegisterPlugin ("TKDFBrowser");
    MyTCommunicator->RegisterPlugin ("TKVInspector");
    MyTCommunicator->RegisterPlugin ("TKShapeView");
    MyTCommunicator->RegisterPlugin ("TKMessageView");
    MyTCommunicator->Init (aParameters);
    MyTCommunicator->Activate ("TKDFBrowser");
  }
  MyTCommunicator->SetVisible (true);
}

Give one the following objects for a plugin using a container of parameters:

2.9.Build procedure

2.9.1.Building with CMake within OCCT

By default the Inspector compilation is off. To compile it, set the BUILD_Inspector flag to “ON”. See Configuration process.

When this option is switched ON, MS Visual Studio project has an additional tree of folders:

2.9.2.Sources and packaging

OCCT sources are extended by the /tools directory.

Distribution of plugin packages :

Other packages:

In MSVC studio, a separate folder contains Inspector projects.

2.9.3.Glossary

• Component – a part of OCCT , e.g. OCAF, VISUALIZATION, MODELING and others.

• Plugin

  – a library that is loaded in some executable/library. Here, the plugins are:

  • DFBrowser,
  • ShapeView,

In MSVC studio, a separate folder contains Inspector projects.

2.9.3.Glossary

• Component – a part of OCCT , e.g. OCAF, VISUALIZATION, MODELING and others.

• Plugin

  – a library that is loaded in some executable/library. Here, the plugins are:

  • DFBrowser,
  • ShapeView,
  • VInspector.