10

I've created a custom launcher file:

[Desktop Entry]
Type=Application
Name=P4V
Comment=Perforce Visual Client
Icon=/usr/lib/p4v/P4VResources/icons/P4-V_128x128.png
Exec=/usr/bin/p4v
Terminal=false
Categories=Development;

And dragged this file to my launcher. However, when I click the icon, it opens the application under a 2nd, different icon (I click the top one, it opens the application under the bottom one):

launcher icons

The bottom icon isn't present until after I launch the application using the top P4v icon that I manually added.

  • 1
    Is this a java app? – dobey Jul 14 '15 at 19:53
  • /usr/bin/pv4 is a script that apparently opens your app in some manner that is itself associated with an icon. Probably javascript - perforce.com/product/components/perforce-visual-client – doug Jul 15 '15 at 1:24
  • 1
    @doug nope, it is an application with a window and a "normal" .desktop file (including a set icon) in /usr/share/applications (I installed it to find out). – Jacob Vlijm Jul 15 '15 at 4:58
8

If an application produces a second icon, not being a generic one

If an application generates a second icon in the Unity launcher other than a a grey, generic icon, there must be already an (other) existing launcher, calling p4v in its main command:

An application's .desktop file by definition has a "main" command in the first line, starting with Exec=. This is the command that is run when the icon is clicked in the (Unity) launcher. Apart from that, a .desktop file can have one or more shortcut- sections, available when you right-click on the representing icon in the Unity launcher.

Multiple .desktop files calling the same application in their main command

The symptoms you are experiencing can happen when more than one .desktop file in either /usr/share/applications or ~/.local/share/applications have the same ("main-") command in their first Exec= line, but the files are differently named.

P4v by default should install (and probably has installed) a .desktop file, named p4vasp.desktop in /usr/share/applications.

How to fix
Your problem should be fixed if you remove your own (probably local) .desktop file, then run p4v from Dash and pin it to the launcher.

What if you want to customize the existing launcher?

If you want to change the .desktop file's behaviour or e.g. its icon:

  • copy the file from /usr/share/applications to ~/.local/share/applications
  • don't change the file's name
  • open the file in gedit (drag it over an opened gedit window) and make the changes you'd like
  • log out and back in, the local version of the .desktop file will overrule the global one.

To revert, simply remove the local one, log out and back in.

Related to this post

  • This answer is just as good in Ubuntu 18.04 with GNOME 3 – Todd Jul 25 '18 at 21:29

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