[SOLVED] Single instance applications on N950
Hi to all,
I have a problem creating a Harmattan N950 application.
- [Desktop Entry]
- Exec=invoker --single-instance --type=d /opt/Qt-Complex-Harmattan/bin/Qt-Complex-Harmattan
This problem happens also on other applications built in the same way: Qt creator included in Qt SDK 4.7.3 with Qt Quick components 1.2 for Symbian and Meego 1.2.
As you can see in the .desktop file above the application should be installed as single instance
Regardles of these settings installing the package on the device the application can be started more than once. Does anyone knows if there is a workaround to avoid this problem? As a matter of fact it should not be possible to manage multi-instance applications on meego, as I know.
Check from terminal if the installed .desktop file is exactly looking same on device than it’s on QtCreator. If not, this trick will install the file correctly: edit rules file adding a space after MAKE, but remember to preserve the tab between MAKE and the following word, otherwise the rules file will break. Then clean and rebuild everything. It’s a bug in QtCreator which will be fixed for next version. This lifesaver tip was provided by my friend, Attila Chipa :)
many thanks for the advice. I have opened the file with an external editor showing the hidden characters. The original file is as follows:
- [TAB]$(MAKE)[SPACE]INSTALL_ROOT="$(CURDIR)"/debian/qtcomplexharmattan install
So the Tab character in my rules file is before the MAKE clause only. I have tried the following two options:
- [TAB]$(MAKE[SPACE])[SPACE]INSTALL_ROOT="$(CURDIR)"/debian/qtcomplexharmattan install
- [TAB]$(MAKE)[SPACE][SPACE]INSTALL_ROOT="$(CURDIR)"/debian/qtcomplexharmattan install
The rules works and the program is packaged. It is launched by the pc connected to the device but the application icon is never shown in the main screen. It is only shown in the installed application list. Then clicking on the empty green icon on the main screen on the device the program never starts…
Any idea? Something set wrong ?
Thank again, matrixx
You managed to run into another bug :) The .desktop file which was missing the single instance invoker command uses the correct installation dir for your app icon (/usr/share/icons/hicolor/64×64/apps/<yourappname>.png) and the icon shows up perfectly fine, until the rules hack has been done. After the hack, QtCreator starts to use the same desktop file you are editing, and by default, it has a wrong path for icon (scalable instead of 64×64). You just have to change it “back” to /usr/share/icons/hicolor/64×64/apps/<yourappname>.png and the icons starts to work again.
Sorry for writing it a bit unclear, it’s a simple thing, I just made it sound horrible.
Just change this line from your .desktop file:
and everything should work like a charm again :)
If the icon doesn’t show up yet, it should show up latest after a reboot.
Hi I changed as you suggested. The program works, and in the installed application list I see the application and the correct icon. In the main page I don’t see any icon at all. If I launch from the terminal the program starts correctly.
Icon is (checked on the terminal) in /usr/share/icons/hicolor/64×64/apps/QtComplexHarmattan.png
while the progam is in /opt/QtComplexHarmattan/bin/QtComplexHarmattan
The QtComplexHarmattan.desktop file is
- [Desktop Entry]
- Exec=invoker --single-instance --type=d /opt/QtComplexHarmattan/bin/QtComplexHarmattan
and all seems correct.
I am rechecking this post from the top. I have set QtComplexHarmattan without – characters because they don ‘t exist in the files wen the program is installed. But I see that in my original file (when it was working as multi-instance with the correct icon) the names was having the – I put them againg to test (bit it is strange). Then, the real strange thing is that in the first file (multi instance and correct icon on the main device page) was with the “wrong” icon name as you can see.
Is there a logic ???
- Created a new project at all
- Added all the sources
- Changed the .desktop file
- Added the double space in rules file
… Program is launched by the Qt-Creator and the correct icon is shown on the installed application list. The green empty icon is shown on the device main page. The green icon don’t start, the applicaiton starts only from the terminal.
- Removed the double space in the rule file: now the rule file is as original.
- Left the desktop file with the changes to the icon path and name.
… Program icon is shown correctly and the program, as usual, can start multiple instances.
Conclusion: sure the double space after the $(MAKE) instruction in the rule files changes the behaviour of the package but not as we want.
Note: The icon is correct, the name is correct and the file on the device is where we expect it is. The same for the application binary.
No more ideas…
MAKE, but remember to preserve the tab between MAKE and the following word, otherwise the rules file will break. Then clean and rebuild everything. It’s a bug in QtCreator which will be fixed for next version. This lifesaver tip was provided by my friend, Attila Chipa :)Check from terminal if the installed .desktop file is exactly looking same on device than it’s on QtCreator. If not, this trick will install the file correctly: edit rules file adding a space after
Hi matrixx, Alicemirror,
I had the same problem and this thread helped me a lot to solved it so I want to say Thank you :)
- Tested the changes under windows. The application is created regularly and the icon works.
- Edited the .desktop file so it point to the right place for the application, for the icon and saw that changing the Application name the value changes on the icon text in the device.
- Checked that the .desktop file is the same on my Windwos development project and on the device too.
If I add the “space” character after the $(MAKE) command in the rules the application never starts from the icon: only starts from the Qt-Creator environment and the terminal
If I remove the “space” added from the rules file all works but – as usual – the application run only in multiinstance mode. Also leaving intact the .desktop file with the changes.
I don’t actually know from where QtCreator grabs the default .desktop file which doesn’t have the invoker line on exec. It might be created by a script, haven’t checked it more closely yet. If you have to choose either 1) single instance, 2) working icon, I would choose #1. After you’ve done the “rules hack”, you are the one who’s controlling the contents of the .dekstop file which is going to be installed on the device. If there’s still bugs left, they can be sorted out.