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README
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README
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Metacity is not a meta-City as in an urban center, but rather
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Meta-ness as in the state of being meta. i.e. metacity : meta as
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opacity : opaque. Also it may have something to do with the Meta key
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on UNIX keyboards.
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The first release of Metacity is version 2.3. Metacity has no need for
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your petty hangups about version numbers.
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METACITY FEATURES
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===
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- Boring window manager for the adult in you. Many window managers
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are like Marshmallow Froot Loops; Metacity is like Cheerios.
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- Uses GTK+ 2.0 for drawing window frames. This means colors, fonts,
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etc. come from GTK+ theme.
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- There are 6 workspaces.
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- Global keybindings:
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Alt-F1 to Alt-F6 switch workspaces
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Alt-1 to Alt-6 switch workspaces
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Alt-Tab forward cycle window focus
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Alt-Shift-Tab backward cycle focus
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Alt-Escape focus previous window
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- Window keybindings:
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Alt-space window menu
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Mnemonics work in the menu. That is, Alt-space then underlined
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letter in the menu item works.
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Choose Move from menu, and arrow keys to move the window.
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While moving, hold down Control to move slower, and
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Shift to snap to edges.
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Choose Resize from menu, and nothing happens yet, but
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eventually I might implement something.
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- Window mouse bindings:
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Clicking anywhere on frame with button 1 will raise/focus window
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If you click a window control, such as the close button, then the
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control will activate on button release if you are still over it
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on release (as with most GUI toolkits)
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If you click and drag borders with button 1 it resizes the window
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If you click and drag the titlebar with button 1 it moves the
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window.
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If you click anywhere on the frame with button 2 it moves the window,
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without raising it.
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If you click anywhere on the frame with button 3 it shows the
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window menu.
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If you hold down Alt and click inside a window, it will move the
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window (buttons 1 and 2) or show menu (button 3).
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If you pick up a window with button 1 and then switch desktops
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the window will come with you to the new desktop, this is
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a feature copied from Enlightenment.
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- Session management:
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Metacity connects to the session manager and will set itself up
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to be respawned.
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- Here is an example of how you can configure the Metacity
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window border appearance in ~/.gtkrc-2.0:
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style "metacity-style"
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{
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font_name = "Sans 16"
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MetaFrames::title_border = { 7, 7, 7, 7 }
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MetaFrames::button_width = 25
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bg[NORMAL] = { 0.0, 0.0, 0.0 }
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}
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class "MetaFrames" style "metacity-style"
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You get the idea. It is just your basic GTK+ rc file, the
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window borders are a widget called MetaFrames,
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look in frames.c:meta_frames_class_init() for all the style
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properties that you can configure.
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- Metacity implements much of the new window manager spec from
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freedesktop.org, and much of the ICCCM. But then there are
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parts of each that it doesn't implement, just because I haven't
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yet.
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METACITY BUGS, NON-FEATURES, AND CAVEATS
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===
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- Metacity creates a big file in your home directory called
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~/metacity.log with a bunch of debug spew.
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- If you want a number of workspaces which is not 6, you have to
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edit screen.c and recompile.
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- If you want keybindings which are not the ones mentioned above
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as features, you have to edit keybindings.c and recompile.
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- Metacity does not have any way to unminimize a window. So
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clicking the minimize button is sort of a bad idea.
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- Metacity uses the new window manager spec, but only random bits
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of the old GNOME spec. It correctly advertises exactly which
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parts of the GNOME spec it supports, but it does not support
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enough of it to make the GNOME task list and desk guide happy,
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and they do not support the new spec. I don't want anyone to
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spend time sending me patches to support the old GNOME spec;
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instead, send patches to the task list and desk guide to support
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the new spec. As far as I know, Metacity does support enough
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of the new spec to allow a working tasklist and pager.
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Upshot: task list and desk guide DO NOT WORK with Metacity.
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- Metacity turns off its keybindings for Emacs, because I use
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Alt-space in Emacs, and getting a window menu annoys me.
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- Cycling windows with Alt-Tab is flickery, AFAIK because
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Metacity passes the entire window stack to XRestackWindows()
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every time you restack. Instead it should probably only restack
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windows that have changed their stacking with respect to one
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another.
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- Various operations, such as minimize, maximize, etc., should
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have simple animations to make them clearer to users.
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- Metacity registers with the session manager, but doesn't actually
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remember window sizes and positions.
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- I haven't even read the ICCCM section about colormaps. So if you
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have an 8-bit display you are basically screwed.
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- Metacity doesn't properly claim the window manager selection
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as described in the ICCCM. But then, most other window managers
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don't handle this correctly either.
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- I know there's at least one race condition involving rapidly
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created and destroyed windows that will crash Metacity.
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- Window placement is always cascade for now; I want to implement
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"first fit, falling back to cascade if no fit."
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(Configurable placement algorithms are stupid though, don't
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send me patches for any bogus ones.)
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- Maximization and movement constraints do not take the
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GNOME panel into account. Most of the code already handles
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this (using workspace->workarea in workspace.h), but
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workspace->workarea isn't ever actually calculated.
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Metacity needs to keep this area up-to-date using the hints the
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panel sets.
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COMPILING METACITY
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===
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You need GTK+ 1.3.x (to become 2.0). See configure.in for the exact
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version you need. Metacity is a fairly trivial 6000-line C program, so
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once you get GTK+ built it should be no problem to build Metacity.
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REPORTING BUGS
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===
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Report new bugs to hp@redhat.com for now. Will switch to Bugzilla
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sometime probably.
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FAQ
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===
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Q: Will you add my feature?
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A: Probably not, unless it makes sense to turn on by unconditionally,
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or is genuinely a harmless preference that I would not
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be embarrassed to put in a user-friendly configuration dialog.
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Metacity has a "no crackrock" policy, with some exceptions
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I'm mildly embarrassed about. For example, multiple workspaces
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probably constitute crackrock, they confuse most users
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and really are not that useful if you have a decent tasklist and
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so on. But I am too used to them to turn them off.
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Sloppy focus is probably crackrock too. Oh, and my Alt-1 thru Alt-6
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keybindings are definitely on crack.
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But don't think unlimited crack is OK just because I slipped up a
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little. No slippery slope here.
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Q: How do I add a configuration option?
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A: You don't, until GConf 2 is relatively easy to compile and I feel
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like adding it as a dependency.
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Q: Will Metacity be part of GNOME?
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A: If Metacity is ever better than the other options, and the GNOME
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Project so chooses. But Metacity may continue to suck forever
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because I might get tired of it; or Metacity's conservative
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nature might not make sense for the snazzy world of
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GNOME. Who knows. I'm not worrying about this, and you shouldn't
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either.
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Q: Why can't I move XMMS?
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A: Because XMMS is broken and is trying to move itself. Metacity
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does not tolerate insolent windows who believe they can
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self-manage. Use Alt-button1 to move XMMS using Metacity.
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Q: Did you spend a lot of time on this?
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A: Metacity is about 6000 lines of code, which took a few weekends and
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evenings to write. If it ever becomes more polished it will
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probably grow 2-3 more thousand lines of code and suck a few more
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weekends of time. If I started adding all kinds of features and
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crack-ridden configuration options, it might take more time than that.
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Q: How can you claim that you are anti-crack, while still
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writing a window manager?
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A: I have no comment on that.
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