graph to be appear on same window

[maarvi]

hello every one i want to ask a question that i have a form in which their is a list box and a a button i select value from list box and press button the 2 graph appears in a new window i have make the graph window appear using show() funtion

what i want is , graph should appear on my main form i will already alot some space in my main window which is first empty but when i click the buttton graph appears on it



hope u people got my question any help will be appreciated

thanks so much

[nish]

make the window which contains the graph, the child of your main window. then just call update().

[maarvi]

thanks so much can u guide me little more thanks

[nish]

tell me what you are stuck at.

[maarvi]

ok sir i will tell u in my program i have a widget window i have places a button an a list box in it. then i have made a class called myplot. i which graph plotting is done . then i n my button event handler i have called the object of myplot



myplot * p1 = new myplot(session,session ,24, "session"); // send arrays in argument containing the data to be plot
p1->show();
myplot * p2 = new myplot(payload,payload ,24, "payload"); // send arrays in argument containing the data to be plot
p2->show();



it working fine as my graph appear in new window. but what i want is that graphs should appear in my mainwigget window .

next what i did is that to remove the title bar of my graphs window i wrote

p1->setWindowFlags(Qt::FramelessWindowHint);
p2->setWindowFlags(Qt::FramelessWindowHint);

now

1) what should i do to place and append the graphs window in my main window. also when i close main window my graph window should close .
2) when i select an other value from the list box and click button my old graph disappear and new should appear

hope you got me

thanks

[Rachol]

You must make p1 and p2 a child widget of your main window. So:

If your main window is created in a similar way as below:


QListWidget *list = new QListWidget;
QPushButton *button = new QPushButton;

QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout ->addWidget(button);
mainLayout ->addWidget(list);

QWidget* mainWindow = new QWidget;
mainWindow->setLayout(mainLayout );

mainWindow.show();

Then the only thing you have to do is this:


myplot * p1 = new myplot(session,session ,24, "session"); // send arrays in argument containing the data to be plot
mainLayout->addWidget(p1);

However If I were you I would place a QScrollArea inside your layout and then place your plots in there.

[maarvi]

sir i have drag and drop the list box and button........ :(

Added after 1 2 minutes:

sir i have written layout->addwidget(p1) but its giving me error that

/usr/include/qt4/QtGui/qlayout.h:191: error: ‘void QLayout::addChildWidget(QWidget*)’ is protected

what should i do .


also plz tell me ho to use scroll area as it is not giving me option for function addwidget


thanks

[nish]

provide a minimal compilable example reproducing the problem. Its very hard for us to make u understand because it looks like you are very new to Qt.

[maarvi]

yes sir this is my first program in Qt and i am facing too much difficulty.
sir my problem is same now i have drag and drop a scroll area in my gui.

now in my button event handler code i wrote the code



myplot * p1 = new myplot(session,session ,24, "session");
p1->setWindowFlags(Qt::FramelessWindowHint);
ui->scrollArea->addScrollBarWidget(p1,0);
p1->show();

upon running the program my graph did not appear what could be the problem i am not getting..... :'(
please help me i will be very thank full

Added after 1 9 minutes:

thank u sir my graph has appeared on the layout.... :D

[Rachol]

That is your problem:





ui->scrollArea->addScrollBarWidget(p1,0);



You must use:

ui->scrollArea->setWidget(p1);