I recently switched to using GNU Emacs 24 from 23, and I notice that whenever I enter gud the *input/output* buffer is open. I have close it manually with C-x 0 everytime I debug. Can anyone point me to the correct variable which needs to be configured in order to stop displaying this buffer by default?
There is a 'gud-gdb' in new emacs releases that implement the old behavior of gdb/emacs interaction (no dedicated-windows and no I/O buffer). If you don't want to call M-x gud-gdb when you use it you can define an alias for M-x gdb
I have this problem as well. After a quick look at the source code, the problem appears to be that GUD dedicates most of its windows (that is, it calls set-window-dedicated-p on them). A dedicated window is one that cannot be switched away from. I guess more and more young guns are using GUD in many windows mode and want GUD to manage their window layout, and those of us that like to do that manually are in the minority. There doesn't seem to be anything obvious in gdb-mi.el that disables this behavior (for example, gdb-set-window-buffer seems to always do a set-window-dedicated-p to t for all windows it manages).
For now, this solution is more or less the one I'm using -- I manually deactivate the window dedication. This seems suboptimal, though. There ought to be some way to get GUD to let you manually manage the window layout. This question is related.
You can disable window dedication altogether like this: (in Emacs 24.4+)
(defun set-window-undedicated-p (window flag)
"Never set window dedicated."
flag)
(advice-add 'set-window-dedicated-p :override #'set-window-undedicated-p)
Note that this doesn't affect already dedicated windows.
I want to open the currently editing html page in a browser and then switch the
window system focus to the browser on a key press. I am using gnome desktop environment.
Below is the code (except the focus switching)
(defun open-in-browser()
(interactive)
(save-buffer)
; switch the windowing systems focus to the browser
(let ((filename (buffer-file-name)))
(browse-url (concat "file://" filename))))
(global-set-key (kbd "<f5>") 'open-in-browser)
I have tried using the lower-frame function and suspend-frame function,
both hides the emacs-frame which is not desired since i will not be able to see the code,
apart from that i have to type ALT-TAB twice to swith to emacs-frame again.
How to switch to another application (just like emulation of ALT-TAB in gnome) using
elisp.
The function you are looking for is probably unfocus-frame but it is obsolete. You need a cooperating window manager in order to actually do what you ask.
You cannot do what you are asking for. Changing the focus is the responsibility of the window manager and emacs cannot do it. You could
call an external program from emacs to do what you want
create a keybinding that would combine <f5> and ALT-TAB
There are programs which can be used to control window managers from the command line, so that you can call a command from elisp to activate windows and stuff.
One such program is wmctrl. I don't know if it works with Gnome, you should try it.
I learned that to add those codes in .emacs can make Emacs saves automatically all situations before quitting and start it next time, Emacs can show the last situation and go on editing it.
(load "desktop")
(desktop-load-default)
(desktop-read)
(add-hook 'kill-emacs-hook
'(lambda()(desktop-save "~/")))
but this codes makes a problem that you only can open one Emacs, when you want to start another Emacs at the same time, only the previous one can run.
I want the function saving all situations for the next use, but I also need to start one more Emacs, How can I get the two sides work simultaneously?
Thank you for your help. I am waiting......
Use different desktop files; or use emacsclient instead of emacs to start new editing buffers once you have your main Emacs up and running. There are multiple examples in Google of an emacs alias / function / whatever to start Emacs if it is not running, and otherwise run emacsclient.
This question probably applies to other emacs modes than haskell-mode, since I assume emacs has got a general way of opening windows for automatically created buffers:
haskell-mode for emacs enables me to hit C-c C-l to load the contents of the current buffer into a Haskell interactive session, which automatically causes emacs to open the buffer for the session in a split window in the current frame. Since I am running a setup with multiple emacs clients connected to a server, I really don't want to show the buffer in each open frame I've got. Is there a way to prevent emacs from doing this kind of thing?
Ah, I found a solution just after posting this :).
Adding
(setq special-display-buffer-names
'("*haskell*" "*Help*"))
to my .emacs tells emacs to open these buffers in a frame instead of a split.
Edit: But still, an even better solution would be for emacs never to create frames/splits automatically, but just silently create special buffers in the background. I can't figure out how to specify this though.
in init.el
(setq split-height-threshold 5)
(setq split-width-threshold 5)
The emacs tabbar.el package adds (buffer)tabs to each window and comes standard with aquamacs and can be added to emacs23 with the emacs-goodies-el package.
Are any of you hardcore emacs users actually using tabbar? I'm sort of used to having tabs, but I would like to know if working without them could be more productive, and if there are other ways besides checking your bufferlist (C-x C-b) to get an overview of your current project files.
As a side note, I really like textmate's project drawer (and tabs), but anything similar in emacs looks just plain hideous.
I've tried using it, but I felt it constraint my workflow rather than improve it. There are a lot of excellent Emacs modes to help with the organization of many buffers and I simply don't feel mapping buffers to tabs is one of those ways.
Just think about the most basic scenario - a lot of tabs. How different programs deal with it - limit the maximum tabs(IntelliJ IDEA); enable tabs bar scrolling(Firefox); infinitely reducing the tabs size(Google Chrome); creating rows of tabs(IntelliJ IDEA)... None of this solutions is that great and by not having tabs in Emacs we have one less problem to worry about. At least this is my subjective opinion - others will most certainly disagree... I personally need nothing more than ido and and iswitchb.
A video of ido in action: http://www.youtube.com/watch?v=lsgPNVIMkIE
Ya, I use tabbar, along with sr-speedbar.
I customize tabbar to show files in specific groups, and mod some keybindings to make navigating the files easier.
FWIW, here's the relevant section from my ~/.emacs:
(require 'tabbar)
; turn on the tabbar
(tabbar-mode t)
; define all tabs to be one of 3 possible groups: “Emacs Buffer”, “Dired”,
;“User Buffer”.
(defun tabbar-buffer-groups ()
"Return the list of group names the current buffer belongs to.
This function is a custom function for tabbar-mode's tabbar-buffer-groups.
This function group all buffers into 3 groups:
Those Dired, those user buffer, and those emacs buffer.
Emacs buffer are those starting with “*”."
(list
(cond
((string-equal "*" (substring (buffer-name) 0 1))
"Emacs Buffer"
)
((eq major-mode 'dired-mode)
"Dired"
)
(t
"User Buffer"
)
)))
(setq tabbar-buffer-groups-function 'tabbar-buffer-groups)
(global-set-key [M-s-left] 'tabbar-backward)
(global-set-key [M-s-right] 'tabbar-forward)
There's lot's of other tips on emacswiki:
http://www.emacswiki.org/emacs/TabBarMode
no.
I use iswitch-b
C-x b "first few letters of buffer", then C-s to rotate to the specific file I want takes me under 2 seconds without me having to move hand to mouse.
No. I could possibly be convinced to try it again with the right customisation, but by default it's pretty useless for me, as I habitually have in excess of 100 buffers open. ibuffer with its filtering and grouping is the best way for managing large numbers of buffers that I've tried.
I like to use speedbar for quick buffer navigation. I have in my .emacs
(speedbar-change-initial-expansion-list "buffers")
(global-set-key [f8] 'speedbar-get-focus)
so when I hit F8, a new frame pops up with a list of open buffers, there you can move point over the buffer you want to select and to activate it. One more F8 goes back to the main frame.
tabs are not reserved for mouse users. look at vim possible workflow: gt to go next tab, or gT to go previous. Say you've one dedicated window for vim: you might easily switch from one buffer to another. Yes, tabs are probably for users with few buffers. if you have hundreds, this won't work.
Quite frankly, you'll find better editors than emacs when speaking of tabs, menus and toolbar. Emacs clearly encourages you to use your keyboard and leave your mouse asleep.
Tabbar or any other tab management tool will have difficulties when you'll have lots of buffers opened. You also don't want to show all your buffers in tabs. Having to remove your hand from the keyboard to grasp the mouse and click on a tab and then remove your hand from the mouse and put it onto the keyboard is clearly a waste of time when a simple keystroke could be used instead.
The best thing you could do to your emacs and to you is to have the following configuration in your .emacs :
(menu-bar-mode -1) ;hide menu-bar
(scroll-bar-mode -1) ;hide scroll-bar
(tool-bar-mode -1) ;hide tool-bar
That will force you to forget the old way of doing things using a mouse (like using tabbar, or menus...), and to use your fingers instead.
Up until now, I haven't tried it, but before I switched back to GNU Emacs from XEmacs, I used the XEmacs tabs very heavily. I found that when I had many source files open, it was one of the fastest ways to jump to the correct file.
Now that I know about tabbar, I am trying it; and so far, I like it.
John
Tabs are really only useful if you use the mouse, and one of the main benefits (to me) of Emacs is that I can avoid the mouse.
So, no, tabbar isn't useful in general.
I did find the tabs useful when I was browsing web pages (using w3m), but I was using the mouse in that case...
Tabbar looks like it is godforsaken
So what about elscreen?
Can be found via http://melpa.milkbox.net/#/elscreen - or installed emacs-elpa (or melpa).
Elscreen is very useful for me.
C-x b<RET> always gives you the last edited buffer. And what do you do with tabs ? Mostly switch back & forth between two files. There you go.