Assume that the name of the project that GMF generates for you is com. example. digoal: Add a custom command in the right-click menu and associate it with the model element named activity. That is, only right-click an element of activity type, this custom command is available in the pop-up menu. The function of this command is to simply change the name attribute of the activity to "modified activity ". The implementation steps are as follows:
1. If
Using GMF to implement the business model editor in the past Graphical Editor framework (GEF) to implement the business model editor is both slow and painful. It takes a long time to understand the complex GEF framework, GEF is a typical MVC Framework. You can customize a model. When the model attributes change, you can notify the model listener. The model listener in GEF is called a controller, it is at the core of the MVC Framework and serves as a b
By using Org. eclipse. GMF. runtime. digoal. UI. the editpolicyproviders extension point can add the required editpolicy to the editpart In the GMF application. The command returned by the editpolicy can control the editpart behavior freely. By the way, GMF runtime provides many extensions to allow various customization of applications generated by
Introduction: This article through in-depth GMF development group to provide us with the Taipan instance, from the installation process to the design intent, then to the implementation method, as well as refactoring taipan applications or plug-ins, in order to fully understand the GMF capabilities and operating methods.
Objective
As a perfect implementation of the MVC architecture, the GEF (graphical Edit
Objective
GMF (Graphical modeling framework) is an open source project for Eclipse, which combines EMF and GEF to provide a powerful framework for the development of model-based graphical editors that can be built by developers Modular approach is easy to generate high-quality code framework.
The GMF is mainly composed of development tools and run-time two parts. The development tool is responsible for th
Applications generated by GMFProgramBy default, the canvas layout uses xylayout. This layout is suitable for UML class diagrams, flowcharts, and other applications, but not for sequence diagrams or tables. Currently, GMF's. gmfgraph model does not provide a place to set the layout for the entire canvas. Therefore, you can only modifyCode. Because GMF Runtime is based on GEF, that is, the code generated by GMF
a framework for simple design and implementation of structural models. EMF providesCodeGenerate tools so that developers can focus on the model itself rather than its implementation details. The fundamental concept of this framework is: Metadata (meta-data), Code Generation (code generation ), default serialization (dafault serialization)The initial purpose of the EMF project is to implement an Object Management Group (OMG) Metadata tool. At the same time, EMF is part of the ecilpse series tool
In addition to configuring the figure component in XML format, GMF allows you to directly write the figure implementation class.
Like GEF, GMF still uses the Java draw2d technical framework in view display, while the figure component we create inherits org. Eclipse. draw2d. Figure
Class or its subclass. Here, we can refer to the source code of the jbpm built-in process editor and copy the predefined figure
Functions of the contributionitemprovider extension point in GMF and org. eclipse. UI. editexceptions is similar to adding actions to the specified editor. However, you can use contributionitemprovider to add actions to the view and add popupmenu and other functions, it is equivalent to a set of multiple action-related extension points provided by eclipse. The following example shows how to use contributionitemprovider to add action to editor.
First
Background
Frankly speaking, using the graphical Editor Framework (GEF) to create graphical editors in Eclipse was slow and painful in the past. This process involves understanding complex frameworks and a large number of redundant code. But it also shows that GEF is the best framework to create a graphical editor, because it has nothing to do with the model. On the other hand, there are some problems with model-independent itself.
A GMF of the goss
Override the configuregraphicalviewer () method of xxxdiagrameditor. Add the followingCodeYou can. However, after a background image is added, the gridlines cannot be displayed, which may be due to the order of layers.
/** * @ Generated not */
Sophomore writing next semester, now graduated one months, finishingWell, the previous writing is very naïve, only self-understanding, online a lot of, probably the meaning of the next barmysql=========================================http://user.qzone.qq.com/652768664/blog/1347859952To connect MySQL needs to install MySQL, in the MySQL C-disk installation directory has a connection lib, will change the Lib Add reference with the project OK; static
Public network of Linux through the FTP command and PHP ftp_connect can not connect, tried 3 machines, can ping, but in the initial connection when the time has been waiting, not to mention the landing FTP server.
However, the local Windows machine can be connected and logged on via the FTP command under the client or CMD.
FTP server firewall is off, FTP port default 21
Reply content:
Public network of Linux through the FTP command and PHP ftp_co
mysql,mysqldump,mysqladmin,php connecting to MySQL service often prompts the following error:
1
2002 (hy000: can ' t connect to local MySQL server through Socket ' /var/libmysql/mysqlsock ' (2
This is due to the mysql.sock location of the socket file that modifies the MySQL service, which is caused by the inability to connect to the MySQL service via the MyS
Use SQL * Plus to connect to the database and sqlplus to connect to the database
About SQL * Plus
SQL * Plus is the primary command-line interface to your Oracle database. you use SQL * Plus to start up and shut down the database, set database initialization parameters, create and manage users, create and alter database objects (such as tables and indexes ), insert and update data, run SQL queries, and mor
Plsql can be used to connect to oracle, but OCILogon cannot be used to connect to oracle. I used to use this program to connect to oracle. but now I cannot connect to oracle. I have no idea why. hope you can enlighten me. the source code is as follows. only the correct IP address is modified, because Database security
Python3.4 how to connect to mysql pymysql to connect to mysql database, python3.4pymysqlThis article describes how to connect Python 3 4 to the mysql database. In Python 3 4, mysqldb of Python 2 7 cannot connect to the mysql database. You can use pymysql.
In python3.4, mysqldb of python2.7 cannot
Tags: mysql remote connection permissionsERROR 1130:host ' 192.168.1.3′is not allowed to connect to this MySQL server which is telling you that you do not have permission to connect the specified IP to the host, let's look at the workaround below.There are two ways of handling 1, (How to resolve the client-server connection (MySQL): xxx.xxx.xxx.xxx is not the allowed to
PHP uses ODBC to connect to the database, and phpodbc connects to the database. PHP uses ODBC to connect to the database. phpodbc connects to the database. this example describes how PHP uses ODBC to connect to the database. Share it with you for your reference. The specific implementation method is as follows: PHP uses ODBC to
Connect by prior start .... connect... when SQL queries are used, a table is often used when there is a limit relationship.
Signature method:
General Limit Method: Select * From table_name WHERE clause 1 connect by clause 2 start with Clause 3
Where connect by clause 2 and start with Clause 3 are placed in the fi
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