Not responding dialog

[rh]

hi all
i'm writing a program that there are two dialogs in it.by pushing a button in first dialog ,data that is written in a line edit should be recieved and second dialog should be open.the problem is that when i run this program,sometimes it works properly.but sometimes it becomes not responding!I check the code in( pushing button function),but i didn't find anything wrong.what's the problem ?what should i do?
thanks.

[loladiro]

Hard to tell without seeing the code.

[rh]

this is the code about pushing button function:
@void SearchContent::on_cmdOk_clicked()
{
Content content;
Contents contents;
TagRelations tagRelations;
Tags tags;
vector<Tag> tag;
QString title=ui->Title->text();
std::string t=title.toLocal8Bit().constData();
content =contents.getByTitle(t);
if(contents.Found==true)
{
AddContent *myAddContent=new AddContent;
myAddContent->show();
this->close();
}
else
{
QMessageBox::information(this,"Error",QString("content with this title not found."));
}

}@

Content,Contents,Tags and TagRealtions are classes that i define them.and Found is a boolean memeber from Contents class that is false by default.but when (getByTitle() ) function from this classis is called ,
if this function can find the content ,Found will become true.

[rh]

and this is the content class and boolean member Found:
@class Contents : public BaseEntity
{

public:
bool Found;
Contents()
{
file="content.dat";
fp=0;
openFile(file);
this->Found=false;

}

Content getByTitle(string Title)
{
this->Found=false;
int MaxID;
fseek(fp,0,SEEK_SET);
myfread(MaxID);
while (!feof(fp))
{
int recordSize, isDeleted;
myfread(recordSize);
if (feof(fp)) break;
myfread(isDeleted);
if (isDeleted)
{
char buffer=new char[recordSize];
fread(buffer,recordSize-metaSize1,1,fp);
delete []buffer;
}
else
{
Content c;
myfread(c.ID);
myfread(c.OwnerID);
myfread(c.Timestamp);
readWithSize(c.Title);
readWithSize(c.Body);
if (c.Title==Title)
{
this->Found=true;
return c;
}
}
}
return Content();
}@

i think the problem is about Found member .because when i remove( if & else) part which is realted to Found memeber,program runs properly.but i don't know what's the problem?

[rh]

nobody knows the answer?

[changsheng230]

Your style of coding is really kind of C programing, and the dialog unresponding should have nothing relationship with Qt UI, QDialog, related to your while loop and logic.

[rh]

you mean the problem is in while loop?

[cincirin]

[quote author="r@h@" date="1310724528"]
@
AddContent *myAddContent=new AddContent;
myAddContent->show();
this->close();
@
[/quote]

You have some problems here. Where you delete the memory allocated for myAddContent ? And ... are you sure you want to close first dialog ? If you just want to hide call QWidget::hide() or QDialog::setVisible(false)