How to check whether qmovie is playing or not in qt

Question

0.00/5 (No votes)

See more:

Hi,

I have to play a gif using QMovie when movie is not running means I have to check movie not running state. Check the below code. Here I am checking the movie state in if condition but here I am getting a segmentation fault. Can you please provide the solution.

QMovie *movie; // which is in global

if (movie->state() == QMovie::NotRunning) //getting segmentation fault here
{
movie = new QMovie("/root/Byjus_Once.gif");
if (!movie->isValid())
{
qDebug()<<"Movie is Inavlid";
}
ui->label->setMovie(movie);
movie->start();
}

What I have tried:

QMovie *movie; // which is in global

if (movie->state() == QMovie::NotRunning) //getting segmentation fault here
{
movie = new QMovie("/root/Byjus_Once.gif");
if (!movie->isValid())
{
qDebug()<<"Movie is Inavlid";
}
ui->label->setMovie(movie);
movie->start();
}

Posted 15-Jul-19 21:11pm

Member 13740197

Updated 15-Jul-19 22:36pm

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

phil.o · Accepted Answer · 2019-07-15T22:36:00

Solution 1

You are getting a segmentation fault most likely because movie pointer is the null pointer.
You could try

C++

if (movie)
{
   if (movie->state() == QMovie::NotRunning)
   {
      // ...
   }
}
else
{
   // movie has not been assigned yet
}

Did you try to debug?

Posted 15-Jul-19 22:36pm

phil.o

Comments

Member 13740197 16-Jul-19 6:46am

Thanks for the answer.