Pdf viewer using QDesktopServices

ChaitraMohan

Hi all,

I am trying to display a *pdf * file using Qt.

I used QDesktopServices for this purpose.
@
QString str = "/home/chaitra/Desktop/xyz.pdf";
QDesktopServices::openUrl(QUrl(str, QUrl::TolerantMode));
@

Though I have Evince pdf viewer, the pdf file is being displayed on the web browser.
While it runs I can see the following:
Opening "/home/chaitra/Desktop/xyz.pdf" with Document Viewer (application/pdf)
No protocol specified
No protocol specified
Cannot parse arguments: Cannot open display:

Can I know why it is not displaying using the default pdf viewer. Is there any additional things that I need to do to display the pdf using the pdf viewer?

Please help me to resolve this.

Thanks you in advance

[edit: added missing coding tags SGaist]

SGaist

Hi and welcome to devnet,

You are using the wrong way to build a QUrl since it's a local file

Try with:

@
QDesktopServices::openUrl(QUrl::fromLocalFile(str));
@

Hope it helps

ChaitraMohan

Hi,

I tried with:
@QDesktopServices::openUrl(QUrl::fromLocalFile(str));@

But I ended up with the same result. PDF is opening in web browser not using Evince.
The error is as below:
"Error: no "view" mailcap rules found for type "application/pdf"
Opening "/home/chaitra/Desktop/xyz.pdf" with Document Viewer (application/pdf)
No protocol specified
No protocol specified
Cannot parse arguments: Cannot open display:"

Can I know what I need to do?

SGaist

Are you sure Evince is the default PDF viewer on your system ?

ChaitraMohan

Ya I am sure I am using that for any pdf view.

But I am unable to display pdf using QtUrl.

SGaist

Just to be sure, Evince opens when you double click on a file ?

andreyc

[quote author="ChaitraMohan" date="1406523641"]
...
Cannot parse arguments: Cannot open display:"
...
[/quote]

You don't run application over the network, don't you?
In addition to SGaist question, try to open this pdf in a terminal.
@
xdg-open /home/chaitra/Desktop/xyz.pdf
@

Chaitra

Hi,
Thank you both.

@SGaist
Ya when I double click on the pdf it opens via "Evince" only.

@andreyc
No I am running my application over network. It a simple application which I have written to open the pdf file. But Its opening via web browser.

I tried with the below commands in terminal. The pdf open via Evince.
@xdg-open /home/chaitra/Desktop/xyz.pdf@

ChaitraMohan

Hi,

May it was a problem with Evince or what I don't know the pdf was opening via web browser instead of Evince.

Now I installed the Adobe pdf viewer. With the code following code pdf is opening via Adobe.

@QString str = "/home/chaitra/Desktop/xyz.pdf";
QDesktopServices::openUrl(QUrl::fromLocalFile(str));@

Thank you for the support.

ChaitraMohan

Hi,

I have one question.
Does QDesktopServices doesnot work in embedded environment?
Because when I try to run the application to open in an embedded environment the following error I am getting:
QDesktopServices::launchwebBrowser not implemented

Can I know the reason for this?

Thank you in advance.

SGaist

Hi,

What embedded environment ?

ChaitraMohan

Hi,

For embedded linux.

I have cross compiled the Qt4.8.6 giving the following configuration options:
@./configure -prefix /usr/local/Qt_4.8.6 -embedded arm -platform qws/linux-x86-g++ -xplatform qws/linux-arm-linaro-g++ -static -no-mmx -no-rpath -no-3dnow -no-sse -no-sse2 -no-glib -no-cups -no-largefile -no-accessibility -no-openssl -no-gtkstyle -little-endian -qt-gfx-linuxfb -fontconfig -no-sql-mysql -no-sql-odbc -no-sql-psql -no-sql-sqlite -no-sql-sqlite2 -no-webkit -no-qt3support -nomake examples -nomake demos -nomake docs -nomake translations -qt-freetype -qt-libjpeg -qt-libpng -gfx-transformed@

The Qt applications are running on the embedded linux. But when I tried to open a pdf using the QDesktopservices:
@QString str = "/home/chaitra/Desktop/xyz.pdf";
QDesktopServices::openUrl(QUrl::fromLocalFile(str));@

I am getting the following error when I run the Qt application:
QDesktopServices::launchwebBrowser not implemented

SGaist

It's not an error. You don't have any desktop environment that handles file/program association so how should Qt know what to launch ? Also since you are using QWS, if you had any program able to read your pdf it should also be built to use QWS.

ChaitraMohan

Hi,

bq. You don’t have any desktop environment that handles file/program association so how should Qt know what to launch ?

I dint understand your sentence. Can you tell me little details about that?

bq. Also since you are using QWS, if you had any program able to read your pdf it should also be built to use QWS.

While building Qt source what should I include so that I can get the pdf view?

SGaist

Desktop Environment: KDE, Gnome, LXDE etc…
The file type/program association is not something that is automagical, your desktop environment has settings where this information is stored so when you double click on a document/media/whatever it opens one application. QDesktopEnvironment uses these services when available.

For viewing PDFs, you need to use an external library like poppler

ChaitraMohan

Yes I have Gnome Desktop environment.
When I double click on the document, it opens with application also. Still when I run the application that statement pops up.

SGaist

Not on your target, otherwise you wouldn't be using QWS

ChaitraMohan

On my target itself I have gnome running.
When I double click on the pdf it opens using evince application.

SGaist

Then if your target is running Gnome, why do you use Qt for Embedded Linux ?

ChaitraMohan

I want to run a Qt application, that opens pdf while I am running the application.