[Solved] Error with layouts

[alfah]

hello everybody.

Cant we place a layout on to another Layout??? I get the following warning when I run the application

"attempting to set QLayout on Qwidget which has already a layout". I dont get the output either, is it because of this warning?

alfah

[Eddy]

This warning tells you the widget you want to set a layout on has already one and you cannot add another one on the same level.

You can use a layout IN another layout though.

[alfah]

This warning appears while attempting this.
A vlayout is being set to a QWidget and this QWidget is set to a tabWidget.

can this warning not give the desired output?
Could you explain on how one layout can be used inside another?

alfah

[Eddy]

Are you using Qt Designer or code?

[alfah]

everythig is code written. Im jus trying to achieve my tabs not refreshing through some alternative.
Instead of creating the obj of the class and putting them in tab, i tried creating a layout and then assign them to a tab.

[lgeyer]

Just use addLayout (as you would use addWidget) to add another layout to a layout.

Can you provide some code so we can take a look at it?

[Eddy]

example with 3 buttons in layout in QTabwidget:
@ horizontalLayout = new QHBoxLayout(Dialog);
tabWidget = new QTabWidget(Dialog);
tabWidget->setObjectName(QString::fromUtf8("tabWidget"));
tab = new QWidget();
tabWidget->addTab(tab, QString());
tab_2 = new QWidget();
horizontalLayout_2 = new QHBoxLayout(tab_2);
verticalLayout = new QVBoxLayout();
pushButton = new QPushButton(tab_2);

    verticalLayout->addWidget(pushButton);

    pushButton_2 = new QPushButton(tab_2);

    verticalLayout->addWidget(pushButton_2);

    pushButton_3 = new QPushButton(tab_2);

    verticalLayout->addWidget(pushButton_3);

    horizontalLayout_2->addLayout(verticalLayout);

    tabWidget->addTab(tab_2, QString());
    tab_3 = new QWidget();
    tabWidget->addTab(tab_3, QString());

    horizontalLayout->addWidget(tabWidget);@

EDIT : this is code generated by Qt Designer in a ui_yourForm.h and helps a lot to learn how to use QLayouts and QWidgets in it.

[alfah]

hey
I have solved it using another alternative. Instead of creating class instances and showing every time. I manually created the whole form with all the labels and text boxes. Put all of them in a layout. And placed the layout in the tabs.

@
void MainWindow::displayTabs()
{
tabWidget = new QTabWidget;
pCalender = new QWidget;
pHistory = new QWidget;
pStatistics= new QWidget;

pCalender->setStyleSheet("background-color: rgb(224, 220, 201);");
pHistory->setStyleSheet("background-color: rgb(224, 220, 201);");
pStatistics->setStyleSheet("background-color: rgb(224, 220, 201);");


connect(tabWidget,SIGNAL(currentChanged(int)),this,SLOT(a(int)));
tabWidget->addTab(pCalender,tr("Calender"));
tabWidget->addTab(pHistory,tr("History"));
tabWidget->addTab(pStatistics,tr("Statistics"));


setCentralWidget(tabWidget);

}

void MainWindow::a(int index)
{
switch(index)
{
case 0:
calCal();
break;

    case 1:
    calHist();
    break;

    case 2:
    calStat();
    break;

}

}

void MainWindow::calCal()
{
CalenderForm *c=new CalenderForm();
qDeleteAll(pCalender->children());
pCalender->setLayout(c->vLayout);
pCalender->show();
}

void MainWindow::calHist()
{
qDebug()<<"hello World";
test *t=new test();
qDeleteAll(pHistory->children());
pHistory->setLayout(t->vLayout);
t->DisplayHistory();
pHistory->show();

}
@

:) :)
alfah

[alfah]

so solved :)