Adding image files to .qrc dynamically

[Dcqt]

Hi ,

Is there any way to add images to .qrc file dynamically from the program itself.
i would like to place all my images in a particular folder and when i compile my program the newly copied images should be added automatically.

Regards,
Dcqt.

[francescmm]

I think that is not possible since the .qrc file is compiled and qrc_resourcesNameFile.cpp generated. This is the fail then added to the exec.

[SGaist]

Hi,

I'm not sure I am following you.

Would you like that i.e. Qt creator to automatically append newly added images from a folder to a given qrc before building ?

[Dcqt]

Ok , if that is not possible i trying to read the contents of .qrc file using below approach.

my app is supposed to run on multiple platforms , will the following code portable or is there any stanadard way of extracting required files from .qrc.

@
QFile file("/home/wip/lays/images_QRC.qrc");
file.open(QIODevice::ReadOnly|QIODevice::Text);

QTextStream in(&file);
QString line = in.readLine();
while(!in.atEnd()){
    if(line.contains("jpeg")||line.contains("png")){ // filters only images 
        qDebug()<<"line 1 "<<line;
        QStringList line1 = line.split("<file>"); //removes "         <file>"
        line = line1[1];
        qDebug()<<"line 2 "<< line1[1];
        QStringList line2 =line.split("</file>");//removes  </file>
        line = line2[0];
        qDebug()<<"line 3 "<<line;
    }
    line = in.readLine();
}

@

[Seamus Boyle]

You'll have more chance of success reading the qrc file as xml. Your code assumes that tags and text are all on one line, which may not be the case.

[Dcqt]

Hi,
is there any standard way , to extract files from qrc?

[SGaist]

There are no files to extract from the qrc file.

It's just an xml list of files on your system that rcc will transform to be compiled in your application, see the "rcc":http://qt-project.org/doc/qt-4.8/rcc.html doc

For more information there is the "resources":http://qt-project.org/doc/qt-4.8/resources.html documentation

Hope it helps

[DrumM8]

There is a much better way to generate to do this during the build process:

Make a template for Jinja (http://jinja.pocoo.org/), which is a python template interpreter:
resources.qrc template:

<!DOCTYPE RCC>
<RCC version="1.0">
    {% for key, value in input_files.items() -%}
    <qresource prefix="{{ key }}">
    {%- for file in value %}
        <file>{{ file }}</file>
    {%- endfor %}
    </qresource>
    {% endfor -%}
</RCC>

Main code for your Python script:

#!/usr/bin/env python
from jinja2 import Environment, FileSystemLoader, select_autoescape
import os

from jinja2 import Environment, FileSystemLoader, select_autoescape
env = Environment(loader=FileSystemLoader(options.templates),
                  autoescape=select_autoescape(['qrc']))
template = env.get_template('resources.qrc')

input_files = []
for root, dirs, files in os.walk(path_with_input_files):
    for file in files:
        input_files += file

with open(output.qrc, "w") as resource_file:
		resource_file.write(template.render(input_files=input_files))

This will generate a new output.qrc file with the files from path_with_input_files! ;-)