3.1.3 Modify mode

In this mode, you can modify and save the graph.

With the left button of the mouse, you can highlight an arc or a node.

With the right button of the mouse, you can modify the graph:

• if you click where there is no arc or node, a new node is created;
• if you click on a node and another node is highlighted, a new arc is created between the two nodes;
• if you click on a node and drag the mouse, the node is moved.

You will find below the description of the items of the menus.

Files

Directory

Change the default directory.

Save

Save the modified graph in the default directory. All the arcs and nodes must have names.

Save As

Save the modified graph with a new name in the default directory. All the arcs and nodes must have names.

Quit

Exit Modify Mode. If the graph has been modified, it must be saved first.

Graph

Characteristics

If there is an highlighted arc or node, print its characteristics, otherwise print the characteristics of the graph.

Find Arc

Prompt for an arc name and highlight it. The viewport of the window is moved to display the arc if needed.

Find Node

Prompt for a node name and highlight it. The viewport of the window is moved to display the arc if needed.

Graphics

Change the scale. The default is 1.

Use internal numbers as names

Use the consecutive internal numbers of arcs and nodes as names. This is useful when doing computations with Scilab.

Display arc names

Display arc names on the arcs.

Display node names

Display node names on the nodes.

Modify

Attributes

Display the attributes of the highlighted arc or node. Then, they can be changed.

Delete

Delete the highlighted arc or node. NOTE: there is no undelete.

Name

Name the highlighted arc or node.

Color

Give a color to the highlighted arc or node.

Create Loop

Create a loop arc on the highlighted node.

Create Sink

Transform the highlighted node into a sink.

Create Source

Transform the highlighted node into a source.

Remove Sink/Source

Transform the highlighted source or sink node into a plain node. It has no effect if the highlighted node is neither a source nor a sink.

Automatic Name

Give the consecutive internal arc and node numbers as the names of arcs and nodes. This can be useful for a new graph. NOTE that if some arcs and nodes already have names, they are replaced by the corresponding internal numbers.

Default Values

Change some default values:

• the default size of the font
• the default diameter of the nodes
• the default width of the border of the nodes
• the default width of the arcs
• the default width of the highlighted arcs

Redraw

Refresh the screen and redraw the graph.