Support #1106
closedManage the memory
0%
Description
Hi all,
Can you give an explanation to manage the memory ?
I'm checking my wt programs with valgrind and it seems that it change between the classes.
For example, this code :
textResourceFileContainer::textResourceFileContainer()
{
// create a file resource
txtFile = new WFileResource("plain/text", "./data.txt");
// the file name to create
txtFile->suggestFileName("data(copy).txt");
// create a link to download which its name is "data adescargar"
WAnchor *anchor = new WAnchor(txtFile, "data a descargar", this);
// create a new window to download
anchor->setTarget(TargetNewWindow);
}
textResourceFileContainer::~textResourceFileContainer(){
delete txtFile;
}
If I call the WFileResource like the WAnchor, Valgrind says me that I have a memory's problem.
Therefore, I have programs where I have a pointer in attributes of my class. Valgrind says the delete of this attribute make a pb of memory.
After that, it's possible it's my fault because of my way of programming, I dont know.
Thanks a lot
Bart.
Updated by Koen Deforche almost 13 years ago
Hey,
You indeed need to manage the ownership of widgets / resources correctly.
Widgets are owned by the parent that contains them, and this is usually what you want so you do not need to delete them yourself.
Resources are not owned by the widget that uses them, since they could be shared. But you can parent them also with any WObject. So you could do the following which binds the scope of the file resource to the current widget:
txtFile = new WFileResource("plain/text", "./data.txt", this);
Regards,
koen
Updated by Arribe Barthelemy almost 13 years ago
Ok, I understand better now.
Thanks a lot.
Bart