Crop Function showing no result
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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 -
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 ?
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Sorry, my mistake, copied the wrong code snippet there...:P
So can you tell me how to modify the code suitably? -
Something like this.
@
QImage img("pathtoyourimagefile");
QImage copy = img.copy(0,0,128,128);@Thus "copy" contains the cropped image.
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but the image file name was input by the user. How should I code for that?
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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");
@