bug#20518: 24.5; Tooltip on Ubuntu 12.04/14.04 can't render

["Jan D." <jan.h.d@swipnet.se>]

Hi.

C-h f x-gtk-use-system-tooltips <RET>

x-gtk-use-system-tooltips is a variable defined in `C source code'.
Its value is t

Documentation:
If non-nil with a Gtk+ built Emacs, the Gtk+ tooltip is used.
Otherwise use Emacs own tooltip implementation.
When using Gtk+ tooltips, the tooltip face is not used.

You can customize this variable.

System tooltips only support text.  Showing images in tooltips is perverse IMHO.

	Jan D.


> 6 maj 2015 kl. 20:57 skrev Xiaolong Zhang <xlzhang921@gmail.com>:
> 
> 
> Hi list,
> 
> The Dired+ package has a feature that with on a image filename, it will
> display a thumbnail of that image. However, it seems that emacs does not
> render tooltip correctly on my machine.
> 
> Here is a code snippet I used for testing.
> 
> 
> -----------8<---------------8<----------------------------------------------- 
> ;; text in buffer can show image correctly
> (insert (propertize "text" 'display (create-image "~/Dropbox/images/1.jpg")))
> 
> ;; tooltip can't render image correctly
> (defun get-tooltip(window object pos)
> (propertize "tooltip" 'display (create-image "~/Dropbox/images/1.jpg")))
> (insert (propertize "text" 'mouse-face 'highlight 'help-echo 'get-tooltip))
> 
> -----------8<---------------8<--------------------------------------------
> 
> This file line can insert an image rendered in the buffer
> correctly. However, the second inserted text only show tooltip text, but
> not the image.
> 
> I have tested the same code with the same image file on Ubuntu
> 12.04/14.04 with Emacs (24.5.1) -Q option. Both failed.
> 
> I have also tested the code on a Windows 8.1 machine with pre-build
> Emacs 24.5. It render the tooltip image correctly.
> 
> I'm wondering if this is a bug of Emacs or Ubuntu?
> 
> Following is some auto-generated message for bug-report, so I keep it FYI.
> 
> Thank you guys!
> 
> Best,
> Xiaolong
> 
> In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
> of 2015-05-07 on xlzhang-HP-EliteBook-Folio-9470m
> Windowing system distributor `The X.Org Foundation', version 11.0.11501000
> System Description: Ubuntu 12.04.5 LTS
> 
> Important settings:
> value of $LANG: en_HK.UTF-8
> value of $XMODIFIERS: @im=fcitx
> locale-coding-system: utf-8-unix
> 
> Major mode: Emacs-Lisp
> 
> Minor modes in effect:
> tooltip-mode: t
> electric-indent-mode: t
> mouse-wheel-mode: t
> tool-bar-mode: t
> menu-bar-mode: t
> file-name-shadow-mode: t
> global-font-lock-mode: t
> font-lock-mode: t
> blink-cursor-mode: t
> auto-composition-mode: t
> auto-encryption-mode: t
> auto-compression-mode: t
> line-number-mode: t
> transient-mark-mode: t
> 
> Recent messages:
> Mark set
> Undo!
> get-tooltip
> nil
> Undo!
> nil
> Undo!
> Saving file /home/xlzhang/code/emacs-bug/emacs-bug.el...
> Wrote /home/xlzhang/code/emacs-bug/emacs-bug.el
> Making completion list...
> 
> Load-path shadows:
> None found.
> 
> Features:
> (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
> mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
> gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
> help-fns mail-prsvr mail-utils help-mode easymenu time-date tooltip
> electric uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd
> tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment
> lisp-mode prog-mode register page menu-bar rfn-eshadow timer select
> scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham
> georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
> korean japanese hebrew greek romanian slovak czech european ethiopic
> indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple
> abbrev minibuffer nadvice loaddefs button faces cus-face macroexp files
> text-properties overlay sha1 md5 base64 format env code-pages mule
> custom widget hashtable-print-readable backquote make-network-process
> gfilenotify dynamic-setting system-font-setting font-render-setting
> move-toolbar gtk x-toolkit x multi-tty emacs)
> 
> Memory information:
> ((conses 16 72398 9042)
> (symbols 48 17485 0)
> (miscs 40 40 138)
> (strings 32 9263 4439)
> (string-bytes 1 254881)
> (vectors 16 8985)
> (vector-slots 8 383624 17310)
> (floats 8 63 253)
> (intervals 56 202 11)
> (buffers 960 13)
> (heap 1024 11163 546))
> 
> 
>