Crop Function showing no result

thescouse

Hi everyone.
I wrote a function to crop an image. The function is as follows:
void ImageViewer::crop()
{ QString fileName=QFileDialog::getSaveFileName(this,tr("Save File"),QDir::currentPath());
QImage image(fileName);
QImage copy ;
copy = image.copy( 0, 0, 128, 128);
}
The program runs without error. But when I try to crop an image, it shows no change and just prompts me to save it, that's all...no change.
Can anyone tell me where the problem is
Thanks

p3c0

Hi,

Please code tags to display the code. This way it will be easier for others to understand your code.

From your code what i understand is,
@QString fileName=QFileDialog::getSaveFileName(this,tr(“Save File”),QDir::currentPath());@
First you are getting the filename that is to be saved and then passing it to the QImage using,
@ QImage image(fileName);@

But Where is your actual file which is to be cropped ?

thescouse

Sorry, my mistake, copied the wrong code snippet there...:P
So can you tell me how to modify the code suitably?

p3c0

Something like this.
@
QImage img("pathtoyourimagefile");
QImage copy = img.copy(0,0,128,128);@

Thus "copy" contains the cropped image.

thescouse

but the image file name was input by the user. How should I code for that?

p3c0

Thus when you have done cropping the file ask for user to enter its name.
So your this code,
@QString fileName=QFileDialog::getSaveFileName(this,tr(“Save File”),QDir::currentPath());@
gets the name of the user entered file.
Then just save the image with that name.
so,
@
QImage img("pathtoyourimagefile");
QImage copy = img.copy(0,0,128,128);
copy.save(fileName,"jpg");
@