KWin Rules

Overview

KWin allows the end-user to define rules to alter the behavior of an application's windows.

For example, when an application is started, it can be forced to always run on Virtual Desktop #2. Or a defect in an application can be worked-around by using a rule to, say, always force the window on top of all others.

This page will define the different settings and the attributes. For the impatient folks, working examples will be listed. Whenever possible, screen shots will be used to show example settings.

Ktip.png
Tip
Panels can also be affected.


Examples

A collection of examples is provided to convey the power of KWin window rules.

KWin Rule Editor

Kwin-rules-ordering.png

Invoking the Editor

There are several ways one can invoke the Rules editor. Below are a couple:

  • Right-click on the title-bar of any window, choose Configure Window Behavior ... and in the Configure window, select Window Rules or
  • Configure Desktop -> Window Behavior -> Window Rules

Anatomy

Kwin-rule-editor.png

The editor is composed of four tabs:

  1. Window matching
  2. Size & Position
  3. Arrangement & Access
  4. Appearance & Fixes

As the name implies, Window matching is used to specify criteria to match one or more windows. The other three tabs are used to alter the characteristics of the matching windows.

Rule Evaluation

When an application starts (or the rules are modified), KWin evaluates the rules from the top of the list until either a matching rule is found or the list is exhausted. If a rule matches, the attributes set in the rule are applied to the window and the window is displayed.

Ktip.png
Tip
When creating multiple rules for an application, list the rules with more restrictive matching criteria first.


Window Matching

Each window rule has user-specified Window Matching criteria. KWin uses the information to determine whether the rule is applicable.

Window Attributes

XXX


Content is available under Creative Commons License SA 4.0 unless otherwise noted.