GLG Extended API是GLG工具包的一款可选控件，它可提供在运行时的高级动态配置与编辑功能。
GLG Extended API为应用程序提供了基于当前配置数据制作绘画的功能。它同样可用来在运行时动态地为绘画添加图片对象，该对象对于能显示不同动态图标（如在地图上移动飞机图标）的应用程序具有非常重要的作用。使用Extended API的另一个例子是能基于用户输入而创建对象的自定义图表应用程序。
除了创建与删除对象的功能外，Extended API同样能提供可用于在运行时在图形绘制中遍历对象以及动态决定绘制内容的高级内窥功能。Extended API能使您访问图片创建程序中的所有操作，不管您选择的部署选项是C/C++、Java还是ActiveX
GLG Extended API is an optional component of the GLG Toolkit, which provides advanced dynamic configuration and editing features at run time.
The GLG Extended API provides an application with capabilities to create drawings on the fly based on the current configuration data. It may be also used to add graphical objects to the drawing dynamically at run time, which is important for applications that display variable number of dynamic icons, such as moving airplane icons on the map. Another example of using the Extended API is a custom diagramming application that creates objects interactively based on user input.
In addition to the methods for creating and deleting objects, the Extended API also provides advanced introspection capabilities, which can be used to traverse objects in the drawing and dynamically determine the drawing's content at run time. The Extended API provides programming access to all operations available in the Graphics Builder, regardless of the chosen deployment option: C/C++, Java or ActiveX.
动态配置与编辑应用程序编程接口（API）
GLG 扩展应用程序编程接口（API）是 GLG 工具包的一个可选组件，它在运行时提供高级的动态配置和编辑功能。
GLG 扩展 API 使应用程序能够根据当前配置数据即时创建图形。它还可用于在运行时动态地向图形中添加图形对象，这对于显示数量可变的动态图标（例如地图上移动的飞机图标）的应用程序来说非常重要。使用扩展 API 的另一个例子是自定义图表绘制应用程序，它可以根据用户输入以交互方式创建对象。
除了用于创建和删除对象的方法外，扩展 API 还提供高级的内省功能，可用于遍历图形中的对象，并在运行时动态确定图形的内容。无论选择哪种部署选项（C/C++、Java 或 ActiveX），扩展 API 都提供对图形构建器中所有可用操作的编程访问权限。
以下列出了需要扩展应用程序编程接口（API）的应用程序类型。
这是一个图表编辑器，用户在运行时通过从选项板中选择一个节点并将其放置在绘图中，来创建图表节点。
这是一个基于地理信息系统的应用程序，它需要在运行时创建动态图标来表示需要可视化的移动物体的位置。由于在设计时图标数量是未知的，因此这些图标是在运行时通过复制一个或多个图标模板来创建的。可以使用几个模板来表示不同类型的被监测对象。
这是一个网络监测或可视化应用程序，它需要根据其数据库中的信息在运行时创建一些节点和连接。扩展 API 用于根据数据库查询创建节点，并根据接收到的连接信息用连接将它们连接起来。
一个过程控制应用程序可以读取一个描述特定工厂设备的配置文件，并在运行时通过复制代表各种过程控制设备的预构建模板并将它们放置在绘图中来生成图形。
如果可以使用图形构建器提前构建图形，那么 GLG 标准 API 就足以显示该图形并用实时数据对其进行更新。Programming API
While the Graphics Builder is used for interactive design of drawings, the Programming API provides a way for the program to interact with the drawing from a program. The API is the second crucial element of the Toolkit, and provides programming access to objects created in the Builder when the drawing is embedded into an application.
The Toolkit provides a number of native programming containers for deploying the Toolkit's graphics in an application, both C/C++ and Java, Unix, Linux and Windows: a Motif/Gtk/Qt widget, an MFC class, Windows custom control, a Java bean and class library, an ActiveX Control and more. Click here for more information on available programming containers and deployment options.
A developer will only need to use a single SetResource function call or method to set any of the drawing's resources, which is a result of the resource based Programming API. The programmer needs to know only the name of a given resource, either an intuitive default such as FillColor, or any custom name given to the resource.
The Programming API may be used to modify resources of the drawing at run-time and supply dynamic data for real-time updates. The application needs to concern itself only with supplying new resource values, and the Toolkit's engine handles all details of the low-level graphics and damage repair. The updates are data-driven, so no CPU time is consumed if the data does not change. Click here for more information.
The API may also be used to handle user interaction, such as object selection or interaction with buttons, sliders and other controls. The object selection is handled transparently by the Toolkit, regardless of the screen size or zooming state, and the program's callback is invoked with all selection information every time an object of interest is selected. Click here for more information.
半岛权威十大直营(官方)网站 
相关产品
授权相关问题
微信
在线咨询
渝公网安备
50010702500608号
客服热线