Hi everybody,
In my Jambi application I am handling lots of widgets. For example for each
click on a QTableView the program shows (creates) an info widget displaying
details of the selected item. Now I noticed a memory leak. I've read two
different posts [1] and [2] on this list about memory issues and understand
that using "dispose()" might help the GC but is not necessary in general.
You'll find a very brief example program below. On my WindowsXP machine with
qtjambi-win32-msvc2005-4.4.0_01 this creates a memory leak when you hit the
"Create" botton a couple of times. Note the significant difference in the
memory leak if you invoke "leak.dispose()" every time.
Is there a way to avoid this memory leak?
What is the difference between dispose() and destroy() when invoked on a Jambi
QWidget? (I noticed that invoking "leak.destroy()" doesn't do much good in my
sample program.)
Any hints will be greatly appreciated,
Curt
[1] http://lists.trolltech.com/qt-jambi-interest/2006-11/thread00042-0.html
[2] http://lists.trolltech.com/qt-jambi-interest/2008-02/thread00008-0.html
import com.trolltech.qt.gui.QApplication;
import com.trolltech.qt.gui.QHBoxLayout;
import com.trolltech.qt.gui.QLayout;
import com.trolltech.qt.gui.QPushButton;
import com.trolltech.qt.gui.QWidget;
public class QtLeak extends QWidget{
public static void main(String[] args) {
QApplication.initialize(args);
QtLeak testQtLeak = new QtLeak(null);
testQtLeak.show();
QApplication.exec();
}
public QtLeak(QWidget parent){
super(parent);
QLayout layout = new QHBoxLayout(this);
QPushButton buttonCreate = new QPushButton("Create", this);
buttonCreate.clicked.connect(this, "create()");
layout.addWidget(buttonCreate);
this.setLayout(layout);
}
@SuppressWarnings("unused")
private void create()
{
for(int i=0; i<1000; i++){
QtLeak leak = new QtLeak(null);
// leak.dispose();
}
}
}
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