KWin

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O gerenciador de janelas seguro e flexível para KDE Plasma, agora com efeitos!.

Descrição das funcionalidades

Estável e seguro
Composição, efeitos em 3D
Configuração fácil
Eficiência melhorada

KWin (pronounced "kwin") is the window manager for the KDE Plasma Desktop. It gives you complete control over your windows, making sure they're not in the way but aid you in your task. It paints the window decoration, the bar on top of every window with (configurable) buttons like close, maximize and minimize. It also handles placing of windows and switching between them.

KWin é compatível com composição, que consiste em utilizar efeitos 3D para manejar suas janelas. Isto pode fazer que o gerenciamento de janelas seja mais suave, fácil, eficiente e natural. Os requisitos de hardware são muito modestos e praticamente todos os sistemas modernos desde 2002 são compatíveis. Ainda há alguns problemas com certos hardware, poderá encontrar mais informação sobre isto no techbase

Características práticas

Clique com o botão direito na decoração de uma janela ou use Preferências do Sistema para acessar à nova e mais singela configuração do KWin. Aqui você pode ativar efeitos para gerenciar suas janelas de forma mais eficiente. Por exemplo, pode usar Apresenta as janelas como efeito para a mudança de janelas. Em lugar de mostrar ícones ou pré-visualizações muito pequenas de suas aplicações, organiza-as em uma rede de forma que possa eleger e adequada rapidamente. Só tem que usar as teclas Alt-Tab e manter pressionada a tecla Alt. Agora pode usar a tabulação para mudar entre as janelas ou ativar usando o mouse. Ao pressionar as teclas Alt-Tab rapidamente se mostrará a janela seguinte na fila, igual anteriormente.

If your X server already supports compositing, switching it on is as easy as opening System Settings, opening the Desktop module, choosing Desktop Effects and enabling the checkbox Enable desktop effects. More advanced compositing settings (such as VSync operation, Direct rendering, compositing mode) are available through the Advanced dialog. Customising the behaviour of the KWin effects means opening the All effects tab, and choosing the plugins you want to use. Please note that only a subset of the plugins works with XRender-based compositing. For the full experience, you need to use OpenGL mode.

Employing motion physics, KWin provides your windows with a more natural feel. New desktop effects like the Cube desktop switcher and Magic Lamp minimize animation have been added. Improvements in the existing effects make window management smoother than ever. KWin has seen many performance improvements to enable these effects even on low-end hardware. Elaborate checks have been build in to ensure users with low-end hardware are not presented with an unusable setup. KWin detects the capabilities of the hardware and if needed gracefully scales its effects down. You can take control and disable these checks or change settings like the global animation speed to fine-tune your experience. When your computer is under heavy load, KWin will automatically disable the compositing temporarily to keep things running smoothly. It will notify you if it does so, and you can re-enable compositing by pressing Shift+Alt+F12. Finally, support for multiple screen handling has been improved in KWin using the new Kephal library. You can move maximized windows between Xinerama screens and the addition of external screens is handled correctly.

More information about what was introduced in KDE SC 4.2 can be found at the following link:

kwin movie

Tutorials

You want an application to launch in a specific size and position every time

Sometimes the screen position of an application is vital to your comfort, so use the flexibility of KWin to make sure it's always where you want it.

Position the window where you want it to open, then right-click on the title-bar, choosing Advanced -> Special Window Settings. This will open a settings window, with appropriate entries already made. All you need to do now is select the Geometry tab and check Position and Size. OK - you are finished!

Script the window manager from the command line

Use the WMIface utility.

Customise the position of titlebar buttons

Take a look at System Settings -> Appearance -> Windows -> Buttons tab - and enable Use custom titlebar button positions. The options open to you may depend on your distribution or theme, and it's clear that there is more to come.

Perhaps you would like more space between the Close button and the Minimise/Maximise pair? So you will want to add a spacer - two if you wish.

To simply move things around you work with the speciman titlebar - that is the dark blue bar with a large KDE on it. Drag icons there and you will see them move in the preview window at the bottom of the screen.

You may find that you have other icons available to you. A circle indicates that the button will set that window on all desktops. Another icon that you may find useful is Shade - a toggle between rolled up (titlebar only visible) and normal view. These icons are added by dragging from the text description window onto the speciman title bar - just position them as you want to use them.

If you prefer a Classic, KDE3-style Desktop

Change to traditional desktop

Right-click on your desktop - select Desktop Settings (or Appearance Settings, in some distros). Change the Type: from Desktop to Folder View. The whole desktop is now a folderview, and another right-click on the desktop will allow you to select FolderView Settings. Set the folderview to the directory you want to use as your desktop.

A video of KWin features

A demonstration of features is here

Open applications directly into a different desktop

Use commands like

kstart --desktop 4 kate

Using with small screens (eg Netbooks)

Make the window decorations smaller

System Settings -> Appearance -> Windows -> Window Decoration tab. Two good options there:

Using the default style (Oxygen), select Configure Decoration and set Button Size to Small and Border Size to Tiny
Select the Laptop

Both routes will give you slim and functional window titles and borders.

Change the base fonts

On many netbooks the screen is very clear, so that reading fonts much smaller than you expect is feasible. On my Acer Aspire One I find that 8 point is a good base settings.

Make Firefox use smaller fonts

Experimentation with about:config did not bring satisfactory results. Do this instead. Download and install gtk-chtheme from this website. Using that tool you can either set a specific font size, or better still, tell it to use your KDE desktop settings. This will work with Firefox as well as any gtk applications that you use.

KMail's Aggregation options take up too much space

See this FAQ to change it.

KMail's Folder-List Tooltips hide too many folder names

See this FAQ to change their behaviour

Gallery

The Gallery holds many screenshots of past and present desktops and effects.

Troubleshoot Graphics Problems

Curing graphics problems depends on knowing the correct drivers for your graphics card. Learn more about this on the Desktop Effects Performance page.

Defining Window Rules

There is a tutorial on defining your own rules for the behaviour of specific windows on the KWin Rules pages.