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Pidgin's appearance is dictated by the interaction of three types of theme files working simultaneously at different levels:
1. Operating System theme - affecting all aplications
2. GTK theme - that GTK aps use to define their GUI elements and
3. Pidgin's specific theme files.
In any particular case, the level at which theming efforts should focus depends on one's goal, knowledge of theming of each of the above file types, the availability of time and desire to sort through numerous setting parameters and the state of bugginess of software at that time.
Example 1: Novice Proof.
Goal: To give only Pidgin a facelift for variety's sake.
Theming Experience: Zero
Desire to dig through configuration files: Zero
Time available: 15 min
By far, the simplest "off the shelf" solution is to download the GTK+ theme installer package which includes a large number of ready GTK themes (engines and corresponding configuration files) as well as a theme switching preference tool.
* Note: all package names that follow are for a Win32 system and can be downloaded here:
1. Download the package: gtk2-themes-2009-09-07-ash.exe
2. If Pidgin was installed in the currently standard way, GTK will be installed within it. Thus, direct the Installation to that "Pidgin\GTK" folder.
3. After Installation, move "gtk2_prefs.exe" from "Pidgin\GTK" to "Pidgin\GTK\bin" subfolder. This is the preference tool (theme selector) file that the installer puts in the wrong place. If this isn't done, the preference tool will not see the new themes loaded.
1. Go to "Pidgin\GTK\bin"
2. Start "gtk2_prefs.exe"
3. Using the Preference Tool's GUI as a demo display, pick a theme you like
4. Start Pidgin
Example 2: Getting Your Feet Wet.
Goal: To change the appearance of all of your GTK aps (Pidgin, Ekiga, Gimp, etc.)
Theming Experience: Minimal
Desire to dig through configuration files: Minimal
Time available: 1 hr
If you got some time on your hands, understand the basics of GTK themes, just want a few themes you know by name and like to keep your system lean and mean (keep out anything unnecessary), you may want to get the GTK+ theme zip package and hand pick the elements you need. Just be aware that theme engines and configuration files are packaged in separate directories, engine names are not always identical to the config file names, one doesn't work without the other and so you may end up having to experiment (which is why the installer is faster and simpler).
* Note: Due to current bugs, there may not be binary compatibility on win32 between compile-time and runtime gtk versions, ie: different apps may be impossible to satisfy with a single install of gtk. In a perfect world, the following could work.
1. Download the theme selector: gtk2_prefs-0.4.1.bin-gtk2.10-win32.zip
2. Download the theme package: gtk2-themes-2009-09-07-win32_bin.zip
3. If Pidgin was not installed in the currently standard way and GTK was installed not within it but for all GTK apps system wide - move relevant components from packages to corresponding folders in that GTK Installation.
Unzip themes and pick the ones you want. Configuration files are in "share" and engines in "lib" directories. Thus, for a theme "Aurora", the folder "Aurora" would need to be moved from the package's "share\themes" to "GTK2-Runtime\share\themes" and the file "libaurora.dll" from the package's "lib\gtk-2.0\2.10.0\engines" to "GTK2-Runtime\lib\gtk-2.0\2.10.0\engines".
4. Continue as above for each theme desired.
5. Unzip the theme selector and move "gtk2_prefs.exe" to "Pidgin\GTK\bin" subfolder.
Example 3: The Comedy of Errors.
Goal: You spent countless hours in front of a monitor and want to reduce eye strain. To accomplish this, you need to create a dark theme (light text on a dark background) for your entire system - all apps Pidgin included.
Theming Experience: Little
Desire to dig through configuration files: Present within reason
Time available: Lots.
If you thirst for knowledge, are not satisfied with off the shelf solutions, require maximum control over the appearance of your apps, have a flexible work schedule and a very understanding girlfriend - buckle up and hold on to your hat! For the author of this passage, to learn how to theme WinXP, Thunderbird, Firefox and Pidgin took exactly one month with Pidgin being by far the most time consuming. Why is this the case? Let's go back to the levels at which theming is applied.
After you will have created your ultimate dark OS theme file, you will have the pleasure of seeing that many apps automatically will just have fallen into place, ie: without any additional theming efforts - not Pidgin! If your new OS theme produces white text on a black background, after a default Pidgin install, you will have the following settings and interaction of the three theme files.
1. OS - dark theme
2. GTK - default theme - "MS-Windows"
3. Pidgin - Buddy List Theme - "Default"
In this case, OS produces the dark theme; GTK's "MS-Windows" acts as a "transparent" layer showing what Win OS dictates and Pidgin's default theme similarly allows to show through what GTK is delivering. The end result is reassuring - dark windows in both buddy and chat windows with buddy group names appearing white on black. BUT, due to a known bug in GTK/GTK MS-Windows theme, OS's theme information isn't properly interpreted resulting in buddies within groups appearing black on black - ie: invisible! (Everything looks fine with a typical "Black on White" theme without the need for any further action but that was not our goal.)
To give users more control, Pidgin allows further customization through its own theme.xml files. Pidgin's Buddy List theme.xml file offers exact control of text and background colour elements in the buddy list window. BUT, as luck would have it, GTK's "MS-Windows" constrains what can be overridden (the only GTK theme to do so). Thus, theme.xml cannot work properly with it. The end result is, to make use of the fine grain control of Pidgin's theme.xml, one must not use the GTK's MS-Win theme. Which is particularly problematic since it is the only GTK theme that can show through Win OS appearance - all other GTK themes take over and mask it. This, regrettably, means that all the effort you've invested in making a beautiful OS theme cannot be seen in Pidgin. It also means that since you cannot rely on GUI information coming from the OS, you now MUST install a GTK theme pack with a theme selector tool (as discussed above) in order to circumvent the only decent looking but malfunctioning GTK file that comes with Pidgin.
After downloading a theme pack, you get access to a large number of GTK themes the manifestation of which you can indirectly affect with theme.xml. Details of theme.xml file syntax, explanation of controls available as well as some sample files can be found here: https://developer.pidgin.im/wiki/BuddyListThemes
Creating a theme.xml file.
Finally, if making a theme to be used with a transparency plugin, remember that dark colours are less transparent than light ones. With monitor brightness set to minimum, dark backgrounds will simply look black. Thus, for the best transparency effect, have to use a light colour palette (which unfortunately is the opposite of what you want if the aim is to create a dark background; therefore, decide what's more important to you).
Installing a theme.xml file.
1. When the file is ready, keep one copy (in backup) under the theme name.
2. Make a copy of it and rename the copy to "theme.xml"
3. Start Pidgin and go to: Tools>Preferences>Themes
4. Drag and drop theme.xml onto the field of the Buddy List Theme
- Pidgin will create the necessary subdirectory structure placing the file in:
5. Move theme.xml from there to:
6. Restart Pidgin
- the new theme will now be present in the list.
Putting it All Together.
Now all the components are in place but there is still one more bug we have to overcome. In Pidgin's theme.xml file, "blist" - the 'colour' attribute that sets the background colour of the entire buddy list - doesn't work. So if the GTK theme is light, the background colour behind buddy text is dark and the buddy list is short or groups are collapsed - the light background will show bellow the buddy list.
To hide this final problem, we have to use both a dark GTK theme and a dark theme.xml.
1. Using the theme selector tool choose a dark background (for example: Xcl-clarius-dark)
2. Start Pidgin and go to: Tools>Preferences>Themes
3. Choose your dark theme from the Buddy Theme List
4. Enjoy the fruits of your labour.
Example 4: Going Pro.
Goal: To attain complete control of GUI of your GTK dependent apps like Pidgin.
Theming Experience: Moderate - Advanced
Desire to dig through configuration files: It's your cup of tea!
Time available: You love it so who's counting?
If you found this journey exhilarating, are looking for a new hobby or are thinking of going pro in the field of GTK GUI development you will have to master editing GTK Theme configuration files (gtkrc's) directly. This is beyond the scope of this discussion; however, a good starting point for that can be found here: https://live.gnome.org/GnomeArt/Tutorials/GtkThemes
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