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.
KWin Rule Editor
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 and in the Configure window, select or
The editor is composed of four tabs:
As the name implies,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.
KWin evaluates the rules when an application starts and after editing rules. Any matching rule's attribute(s) override the application's corresponding attribute(s).
In thewindow, the rules are listed in the order in which they are processed.
The rule at the top of the list is processed first, followed by the next rule until the end of the list is reached.
In the event two rules match a window and affect the same attribute, the first rule in the list takes precedence.
Thetab provides a series of matching-criteria fields used to identify application windows:
- This window and all its children windows.
- - a window within the application (e.g. Main Window)
- - Normal Window, Dialog Window, etc. The different types are presented.
- - self-explanatory.
- - Useful when identifying a window which is logging on to a specific remote machine.
For each field, the following operators can be applied against the field value:
- Exact Match
- Substring Match
- Regular Expression - Qt's regular expressions are implemented. For additional information, perform a web search with qt regex nokia.
Detect Window Properties
Thefunction simplifies the process of entering the matching-criteria.
- For the application you'd like to create a rule, start the application.
- Next, set the number of seconds of delay before the function starts. The default is zero seconds.
- Click on and
- When the mouse-cursor turns to cross-hairs, place it inside the application window and left-click.
- A new window is presented with information about the selected window:
- Machine (hostname)
The information is used to back-fill the criteria.
By using a combination of the information, you can tailor whether the rule will be generic and apply to the entire class or certain windows, say a particular Type of window, within the class.
Force a Window on a Desktop
Force a Window on all Desktops
Suppress a Window showing on Pager
Force a Window to the Top
Good for knotes
Multiple Rules per Application
e.g. Thunderbird on one desktop and composition window on any