CN104239491A - Vector graph updating method for describing service information - Google Patents

Abstract

The invention relates to a method for updating vector graphics describing business information. Its characteristic is that it includes the following steps: first, describe the vector graphics through the vector graphics information description file, the server extracts the latest vector graphics information regularly or on demand, and when the client obtains the latest vector graphics information, hand it over to the graphics data The parser parses out the specific graph information including nodes and connections, and compares it with the original graph to analyze the incremental information of the graph change, and then the graph generation module modifies the original graph according to the incremental information, ensuring that it is consistent with the original graph. On the basis of graphics consistency, the latest vector graphics are generated. Through the method of the invention, the work of the server can be simplified to extract the latest graphic data regularly or on demand to form vector graphic data description information. It not only simplifies the implementation of the server, reduces the burden on the server, but also improves the stability of the server.

Description

A Vector Graphics Update Method for Describing Business Information

technical field

The invention relates to a method for updating vector graphics describing business information.

Background technique

Today, the vast amount of data generated by a wide variety of information sources far exceeds the ability of the human brain to analyze and interpret this data. As the most effective means of explaining large amounts of data, visualization technology was first adopted in the field of scientific and engineering computing. Visualization converts data into graphics, gives people profound and unexpected insights, and fundamentally changes research methods in many fields. The application of visualization technology is as large as high-speed flight simulation, as small as the demonstration of molecular structure, everywhere. In the Internet era, the combination of visualization and network technology makes remote visualization services a reality.

Graphic presentation is a very important part of visualization. It enables data to express and communicate information clearly and effectively by means of graphics. At the same time, in actual situations, graphic data is often stored on the server, and graphic display often needs to run on the client, which requires a targeted design for data updates, so that the update of graphic display becomes fast and efficient.

Incremental update means that only the parts that need to be changed are updated during the update operation, and the parts that do not need to be updated or have been updated will not be updated repeatedly. Incremental update is opposite to full update. This update concept has a wide range of applications, and it will be used wherever data updates are required. Features: 1. Only update the parts that need to be updated; 2. Compared with the full update, it is faster and the processing volume is reduced; 3. The incremental update needs to set rules before the update and stipulate the update strategy;

Contents of the invention

The purpose of the present invention is to provide a vector graphics update method for describing business information with clear concept, simple implementation and high accuracy.

A vector graphic update method for describing business information, which is particularly characterized in that it includes the following steps: first describe the vector graphic through a vector graphic information description file, and the server extracts the latest vector graphic information regularly or on demand. After the client obtains the latest vector graphic information, the graphic data parser parses out the specific graphic information including nodes and connection relationships, compares it with the original graphic, analyzes the incremental information of graphic changes, and then uses the graphic generation module Modify the original graphics according to the incremental information, and generate the latest vector graphics on the basis of ensuring consistency with the original graphics.

Among them, the XML language is first used to record vector graphics information that has nothing to do with business, and the server will extract it regularly or on demand to form a vector graphics XML file. When using it, deserialize the vector graphics XML file to obtain graphics information and compare it with the original graphics. , analyze the incremental information, and display the vector data graphically, so that users can view, edit vector data graphically, and perform incremental updates.

The incremental information specifically refers to the addition, modification, and deletion of graphic objects.

Through the method of the invention, the work of the server can be simplified to extract the latest graphic data regularly or on demand to form vector graphic data description information. It not only simplifies the implementation of the server, reduces the burden on the server, but also improves the stability of the server. The client side obtains the description information of the graphic data and then analyzes and generates graphics, which makes full use of the computing power of the client side.

Description of drawings

Accompanying drawing 1 is the flowchart of the method provided by the first embodiment of the invention.

Detailed ways

To achieve the above object, the present invention provides the following scheme:

1. The server extracts the latest vector graphics data (including node and connection information) to form a vector graphics data description.

2. Define the vector graphics data description format, including:

When designing, use XML to describe the vector graphics data, the first line declares the vector graphics data description file, defines the XML version as 1.0, and uses the encoding as UTF-8.

The second line describes the root element of the document, defines the name of the root element as "Graph", and defines attributes for it, including:

Define an attribute named "time" on the "Graph" element, and the value of this attribute is the generation time of the graph vector data.

An element named "Elements" is defined under the root element "Graph" to describe node information. And define properties for it, including:

Define an attribute named "count" on the "Elements" element whose value is the number of nodes.

According to the extracted information of each node, define an element named "Node" under the element "Elements" to represent each node and define attributes for it, including:

Define an attribute named "id" on the "Node" element to specify the unique identification of the node.

Define an attribute called "name" on the "Node" element to specify the name of the node.

Define an attribute called "type" on the "Node" element to specify the type of node.

Other information can also be added to the "Node" element according to actual needs, such as the position of the node, etc.

Define an element named "Links" under the root element "Graph" to describe connection information. And define properties for it, including:

Define an attribute named "count" on the "Links" element whose value is the number of links.

According to the extracted information of each link, define an element named "Link" under the element "Links" to represent each link information and define attributes for it, including:

Define an attribute named "id" on the "Link" element to specify a unique identifier for the link.

Define an attribute called "name" on the "Link" element to specify the name of the link.

Define an attribute called "type" on the "Link" element to specify the type of connection.

Define an attribute named "s_node" on the "Link" element to specify the starting node of the link.

Define an attribute named "e_node" on the "Link" element to specify the terminal node of the connection.

The description file of the designed vector graphic information can be persisted in the form of an XML file, and it can also be compressed and persisted in order to speed up network transmission.

3. The client obtains the latest vector graphics data description, and the vector graphics data parser analyzes the incremental information of graphics changes, and then generates the latest vector graphics through the graphics generation module.

4. Define a vector graphics data parser, including:

The vector graphics data parser deserializes and analyzes the description files of vector graphics data, including:

The vector graphics data parser reads the description file (XML file or compressed XML file) of the vector graphics data, and deserializes each parameter information included in the description file.

The vector graphic data parser obtains the latest graphic object information according to the read parameters, compares it with the original graphic, and analyzes the incremental update information (including the addition, modification, deletion, etc. of nodes and connection relationships). The specific process is:

1) A hash table is established for the original graphic objects (including nodes and connections), and the key value is the unique ID of the graphic objects (including nodes and connections).

2), compare each record in the latest graphic object information (including nodes and connections) with the data in the hash table, if the data does not exist in the hash table, then the data is newly added, if If the piece of data exists in the hash table, but the attributes are inconsistent, then the piece of data is modified.

3) After the comparison is completed, query the unmatched data in the hash table. These data no longer exist in the new graph and should be deleted.

5. According to the graphics incremental information analyzed by the vector graphics data parser, combined with the graphics layout algorithm, the original graphics are incrementally updated, and the latest vector graphics are generated on the basis of ensuring the consistency with the original graphics to the greatest extent , the specific process is:

1) Lock the graphics objects that have not changed, so as to ensure that these graphics objects will not change when the graphics are re-layouted.

2). Delete the graphics objects that no longer exist in the graphics.

3) For the changed graphic object, modify the attribute.

4), add a new graphic object, and re-layout the graphic. If the newly added node has location information, the node is laid out according to the location information. If there is no location, the layout rule specified by the actual business (such as grid layout, tree graphic layout, etc.) for incremental graphic layout to generate the latest graphics.

In the method of the present invention, XML language is used to record vector graphics information in a device-independent data description form, and only the information irrelevant to business in the vector graphics data can be recorded, which can be persisted in the form of XML files, and can be persisted in the form of compressed XML change. The file is extracted by the server regularly or on demand to form the file. Deserialize the vector graphic information description file to obtain graphic information. Compare with the original graphics and analyze the incremental information. Display vector data graphically. Users can view and edit vector data in a graphical way. Incremental updates are only done for vector graphics, otherwise all information in the graphics is preserved.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

The specific implementation of the present invention is carried out according to the process shown in Fig. 1, and the description and display of a graph in a certain business system is taken as an example below to describe the steps in the process.

1. The server extracts the latest graphics data regularly or on demand to form vector graphics data description information.

2. The client obtains the description information of the vector graphics data, sends it to the vector graphics data parser for deserialization, and analyzes the graphics incremental information.

3. The graphics generation module of the client modifies the original graphics according to the graphics incremental information, and generates the latest vector graphics on the basis of ensuring the consistency with the original graphics to the greatest extent.

Claims (3)

1. A vector graphics update method for describing business information, characterized in that it comprises the following steps: firstly describe the vector graphics through a vector graphics information description file, and extract the latest vector graphics information regularly or on demand by the server, when After the client obtains the latest vector graphic information, the graphic data parser parses out the specific graphic information including nodes and connection relationships, compares it with the original graphic, analyzes the incremental information of graphic changes, and then uses the graphic generation module Modify the original graphics according to the incremental information, and generate the latest vector graphics on the basis of ensuring consistency with the original graphics. 2. A method for updating vector graphics describing business information as claimed in claim 1, wherein the vector graphics information irrelevant to the business is first recorded in XML language, and the vector graphics information is extracted regularly or on demand by the server to form vector graphics. Graphical XML files, deserialize vector graphics XML files when using them, obtain graphic information, compare with original graphics, analyze incremental information, and display vector data in a graphical way, so that users can graphically way to view, edit, and incrementally update vector data. 3. A method for updating vector graphics describing business information according to claim 1 or 2, wherein the incremental information specifically refers to the addition, modification, and deletion of graphic objects.