Introduction
+ +GVedit is a +Graphviz tool for creating, viewing, editing and processing DOT files. It +allows users to set attributes of graphs with dialogue boxes and save them +for future use. GVedit users can also take advantage of the simple +instant previewing feature of the program.
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Menu system
+ +GVedit's main menu bar +provides basic file options such as Open, Save, Save As and simple editing +operations such as Cut, Copy and Paste. Most of the common commands +also have standard keyboard shortcuts. +Below you will find a list of the menu items and brief information on +each of them.
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File:
+ +New: Creates a blank text +window. You can use it to write a description of a graph in the DOT language. +New graphs are not saved to disk until you save them manually.
+ +Open: Opens a file +dialogue box to select and load a DOT file into the editor. Each file is opened in a +new window and does not affect other open graphs.
+ +Save: Saves the active +graph to disk. If the active graph is new and does not have a name, +it opens a Save As dialogue to allow you +to specify the file's name before saving.
+ +Save as: Opens a Save As +dialogue to save the active graph. You can save a graph under different names but +you will always be working with the most recently saved graph.
+ ++Close: Closes the active graph window. If there are any unsaved changes, +you get a dialogue box asking if you want to +save the changes before closing the graph.
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Edit:
+ +Undo : This command +rolls back the last thing that you have done within the active graph.
+ +Cut : Removes selected +text and keeps it in the clipboard.
+ +Copy: Copies selected +text to the clipboard.
+ ++Paste: Inserts the text from the clipboard into the cursor position on the +active graph.
+ +Find: Opens the find +dialogue box to allow you to locate desired text in a graph.
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Graphviz
+ +Run: Processes the active +graph with the last attributes that were used for it. If the active graph has +never been processed before, it opens the settings window.
+ +Settings: Opens the +settings window. Details of this window are given below. +
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View
+Cascade: +Sets the style for handling multiple windows to cascade, in which each +new window overlaps the previous one. +
+Tile: +Sets the style for handling multiple windows to tiling, in which the +open graph windows partition the root window. +
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Help
++Help: Opens a manual page describing how to use this program. +
++Graphviz on net: Opens a browser window on the Graphviz home page. +
++About GVedit: Provides version information about the program. +
+ +Tool bar
+ +Under the menu bar, +there is a toolbar with five buttons on it. These buttons are nothing but shortcuts +to some menu items. Each button has a tool tip attached to it to +indicate its purpose.
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Working with multiple graphs; the active graph.
+ ++GVedit allows you to have multiple graphs open at the same time. At any +time, there is a single active graph. +Anything you do using either the GVedit menus or the settings window affects the +active graph. When you go to the settings window, you always see the +settings of active graph. +The settings of each graph are maintained separately. +
++To make a graph active, click on its window. +The background of the active graph window is white +while all others are gray. +
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Settings window
+ ++With the settings window, +you can select the layout engine, set the output type and file, +and set any attributes that are available with the Graphviz release +installed on your computer.
+ +Layout engine: +Graphviz provides five different graph layouts. You can select +the one which best fits your needs. More information about these layouts +can be found at the Graphviz home page +
+ +Output file name: +This field allows you to specify the output file name. +You can either type in the name, or use the +small button by the text box to open a file +dialogue box. +This field corresponds to the –o option of Graphviz. +
+ +Output +file type: This drop down list allows +you to select the output file type. The output file name's extension is changed +accordingly. +This field corresponds to the –T option of Graphviz. +
+ +Graphviz +bin folder:You usually do not need to +enter anything here. During the Graphviz installation, locations of the Graphviz +files are stored in the registry and GVedit retrieves it from there. If, +for some reason, Graphviz files are not where they are supposed to be +and GVedit can not +find them, you can edit this information manually. +
+ ++Preview Output file: +If this box is checked, +GVedit creates a low-quality preview of the output and shows it in a +separate window. It is a convenient way to preview the results without +executing another viewing program. +
+ ++Apply cairo filter: +If this output format is supported by the cairo library, this box becomes +active. If checked, output will be generated using the cairo library +rather than the default renderer. +
+ +Attributes: +On the lower half of the settings window, you will see two dropdown lists, +one small text box, and a larger text editing area. GVedit processes the +contents of the large box as additional, generic graph, node or edge attributes. +(These correspond to the –G, –N, and –E command-line options of Graphviz.) +You can either type directly in the large text box, +or use the drop down lists to pick +an allowed scope and one of the common attribute names. +For details of these attributes, refer to the +page of Graphviz attributes. +
+ ++If you specify an attribute using the drop down lists, you need to click on the +Add button to register the attribute. +If you do not click on +Add button, the attribute that you entered will not be +added to the large box, hence will not be processed. +
+ +As an +example, assume that we would like to have a graph drawn +with a green background. +First, click on the scope list and select graph; +then click on the name list and +select bgcolor; and then type green to the value box. +Finally, click on the Add button to send the attribute to large box. +
+ ++Belowe the Add button is a Help button. Clicking on this +will open a browser window on the Graphviz page describing the supported +attributes. +
+ ++Under the large box, there are 3 small buttons, plus +Cancel and OK buttons. The first button is used to +clear the attributes box; +the second one is used to load an existing text file into the attributes box; +and the last one is used to save the attributes to a text file for later use. +The Cancel button closes the window without processing anything; +the OK button processes the +active document file with the settings on the screen and closes the settings +window. If you check the preview check box, you will see the preview of the +graph layout on the screen.
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Console window
+ ++At the bottom of the +main window, there is a console window where you can see the results of your +actions. This provides a trace of your layout actions, showing the +Graphviz command corresponding to the active graph's settings. It also +displays warnings from GVedit, as well as the output of the +executed Graphviz programs. +By right clicking on the console window, you will get a menu providing some +additional functions, such as clearing or saving the console logs.
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int y = 7;
+ int z = 7;
+ int n = 7;
+ int n = 7;
+ int n = 7;
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