Lugaru's Epsilon
Editor 14.04

Epsilon User's Manual and Reference
   Commands by Topic
      . . .
      Fixing Mistakes
         Interrupting a Command
      The Screen
         . . .
         Customizing the Screen
         Setting Colors
         Code Coloring
         Window Borders
         . . .
      Buffers and Files
         File Variables
         . . .
         Buffer List Editing
      . . .

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Fonts  Commands by Topic   Code Coloring

Epsilon User's Manual and Reference > Commands by Topic > The Screen >

Setting Colors

This section describes how to set colors in Epsilon. Epsilon comes with many built-in color schemes. Each color scheme tells Epsilon what color to use for each color class. Color classes correspond to the different parts of the screen. There are separate color classes for normal text, highlighted text, text in the echo area, syntax-highlighted comments, and so forth. (See below for a partial list.)

Use the set-color command to select a color scheme from the list of available color schemes. You can also customize a color scheme by selecting one, selecting a color class within it, and then using the buttons to select a different foreground or background color, or toggle bold, italic, or underlined styles. The available styles depend on the selected font, as controlled by the font-styles-tolerance variable.

You can press + and - to expand or collapse categories in the tree of color classes. In dialog-based versions of set-color, the <Right> and <Left> keys also expand and collapse categories. In most versions, you can also press Ctrl-s or Ctrl-r to search for a color class by name.

Epsilon remembers the name of one color scheme for use on text mode displays with only 8 or 16 possible color choices, and a separate scheme for environments like Windows or X11 where it can display all possible colors. (It also maintains separate schemes for monochrome displays, and for when Epsilon runs as a Unix terminal program within an xterm and the USE_DEFAULT_COLORS environment variable is defined; the latter enables a special color scheme that's designed to inherit the background and foreground colors of the underlying xterm.)

When you've turned off window borders with the toggle-borders command, Epsilon uses color schemes with particular, fixed names. See Window Borders.

Another method of customizing a color scheme is to create an EEL file like stdcolor.e. The file stdcolor.e defines all Epsilon's built-in color schemes. You can use one of these as a model for your own color scheme. See Color Classes for the syntax of color scheme definitions. You can use the export-colors command to build an EEL file named mycolors.e that contains all Epsilon's current color definitions for the current color scheme. (With a numeric argument, it lists all schemes.)

The Windows Console and Unix terminal versions of Epsilon are limited to the sixteen standard colors for foreground and background, for a total of 256 possible color combinations, while the Windows GUI and X11 versions have no such limitation. Internally, all versions of Epsilon store 32 bits of color information for the foreground and background of each color class. The console and terminal versions convert back to 4 bits of foreground and background when displaying text. In these environments, there are no buttons for selecting a foreground or background color. Instead, the arrow keys select colors.

The set-color command displays a short description of each color class as you select it. Here we describe a few of the color classes in more detail:

Epsilon puts the text of an ordinary buffer in this color. But if Epsilon is doing code coloring in a buffer, it uses the color classes defined for code coloring instead. For instance, C++ and Java files both use C mode, and the color classes defined for C mode all start with "c-" and appear farther down in the list of color classes.

Epsilon uses this color for the text in the mode line of a tiled window.

Epsilon uses this color for the line part of the mode line of a tiled window.

Epsilon uses this color for the vertical border it draws between tiled windows.

Some console versions of Epsilon try to leave the screen in this color when you exit. Epsilon normally sets this color when it starts up, based on the screen's colors before you started Epsilon. Set the restore-color-on-exit variable to zero to disable this behavior, so you can set the color explicitly and preserve the change in your state file.

The EEL debugger uses this color when it displays EEL source code.

Epsilon initializes any newly-defined color classes (see Constants and Identifiers) with this color.

Epsilon sets the border area around the screen or window to match this color's background. Epsilon only uses the background part of this color; the foreground part doesn't matter.

Epsilon for Windows can draw a focus rectangle or column markers. The foreground color specified here determines their color. See the draw-focus-rectangle and draw-column-markers variables.

The pull-word command uses this color for its highlighting.

Standard bindings:


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Lugaru Epsilon Programmer's Editor 14.04 manual. Copyright (C) 1984, 2021 by Lugaru Software Ltd. All rights reserved.