NAME¶
graphdraw - directed graph editor derived from drawtool
SYNOPSIS¶
graphdraw ['X-params'] [file]
DESCRIPTION¶
graphdraw implements a graph (node/edge) editor. graphdraw adds two new
graphical objects to idraw/drawtool: an elliptical shaped node and a directed
edge represented as an arrow line. Two new tools to create these objects are
provided at the bottom of the toolbar. The Node tool (selectable by the 'N'
key) takes a single mouse click and creates a new graph node at the click
location. The Edge tool (selectable by the 'E' key) lets you drag a line to
create a new graph edge. If an edge is drawn from or to an existing node, it
will connect itself to the node(s) and maintain that connectivity during any
later movement of nodes or edges. The Move tool will move edges or nodes,
rubberbanding the rest of the graph, and redrawing any connected edges to
maintain graph connectivity and edge alignment.
Nodes contain a (initially empty) text string which can be edited by applying
the Alter tool to a node. A single click on a node while on the Alter tool
will create a text cursor, possibly within an existing text string, and allow
editing of the text via the usual Emacs editing commands. A click outside the
text terminates editing and causes the new text to be centered within the
node.
For Node and Edge objects, the Selection highlight mechanism has also been
changed from the usual drawing of "handles" around a graphical
object to a red foreground color. When Nodes or Edges are selected, they turn
red instead of handles being drawn around them.
graphdraw documents are saved/restored in a readable text file. Some of the
tokens used in the text file are specific to graphdraw (and possibly any
program derived from graphdraw). graph drawings can be exported to other
idraw/drawtool applications via the "Export Graphic" command (under
the File menu). This generates Postscript in a format that idraw can read back
in, and programs like drawtool can import via "Import Graphic"
(under the file menu).
A Tools menu has been added to the set of pull-down menus to allow switching
between a graph editing toolbar and a generic graphics editing toolbar.
SEE ALSO¶
drawtool, idraw
WEB PAGE¶
http://www.ivtools.org/ivtools/graphdraw.html