lines

lines − a Tcl package for drawing lines in visky.

2.1

The lines package augments visky with the ability to draw

When it loads, the lines package adds a Lines menu to the main menu bar with the following selections:

Add

Creates a dialog box in which user enters a line name and input file. The input file should contain a point count followed by latitude longitude values for that many points. A line can contain several segments. There should be a point count followed by latitude longitude values for each segment. If the input file name starts with ’|’, the name should be a command whose output will be read. Thus input can come from be compressed files or can be the output of applications that extract point counts, latitudes, and longitudes from files in other formats.

Delete

This cascade menu has an entry for each line created with the Add menu. Selecting one deletes the line, and associated menus and bindings, from all displays.

The lines package also adds a Lines menu to each map. Selecting a line from this menu makes it appear in the map and also presents a dialog box with configuration options. The Map->Colors menu selects the color. The Map->Layers menu selects the layer.

Double-clicking a line makes the configuration dialog appear. Control clicking a line adds or deletes a label. Dragging a label moves it up and down, or left and right relative to the line.

File parameter_directory/lines stores options and runtime information between sessions. See the visky (n) man page for more information on how the parameter directory is identified and used. parameter_directory/lines is a plain text file. It can be edited before loading the package to set defaults. The file is automatically updated with the current state when the package unloads, usually when the visky application exits.

Gordon Carrie <user0 at tkgeomap.org>