problems with getting height and width of widget

[martinn]

I need to get the height and width for a QFrame inside a tab of a QTabWidget. The QFrame is inside the first tab of the tabwidget and I can only get the right width and height if this is the tab selected when I do showMaximized. From what I understand I can get the width and height if the widget have been shown as this is when it is calculated. So from what I understand the best way to get the size must be when changing between the tabs and the new tab is visible. How can I do that?

Its a little bit hard to explain the problem but the main thing is that I need to get the height and width of a QFrame and as the QFrame is depending of the screen size it changes when it becomes visible. So how can I get the size of the QFrame?

This is the code (If I set tabWidget->setCurrentIndex(0) I get the right size in whatIsTheSize(), as 0 is the tabindex with the QFrame inside.)
main.cpp:


TestSize *w = new TestSize();
w->showMaximized();
w->whatIsTheSize();


TestSize.cpp:


void TestSize::whatIsTheSize() {
int WIDGETWIDTH = ui.frame->width();
int WIDGETHEIGHT = ui.frame->height();
}


ui_testsize.h:


void setupUi(QWidget *TestSizeClass)
{
if (TestSizeClass->objectName().isEmpty())
TestSizeClass->setObjectName(QString::fromUtf8("TestSizeClass"));
TestSizeClass->resize(207, 300);
verticalLayout = new QVBoxLayout(TestSizeClass);
verticalLayout->setSpacing(6);
verticalLayout->setContentsMargins(11, 11, 11, 11);
verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
tabWidget = new QTabWidget(TestSizeClass);
tabWidget->setObjectName(QString::fromUtf8("tabWidget"));
tab_3 = new QWidget();
tab_3->setObjectName(QString::fromUtf8("tab_3"));
verticalLayout_2 = new QVBoxLayout(tab_3);
verticalLayout_2->setSpacing(6);
verticalLayout_2->setContentsMargins(11, 11, 11, 11);
verticalLayout_2->setObjectName(QString::fromUtf8("verticalLayout_2"));
frame = new QFrame(tab_3);
frame->setObjectName(QString::fromUtf8("frame"));
QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
sizePolicy.setHorizontalStretch(0);
sizePolicy.setVerticalStretch(0);
sizePolicy.setHeightForWidth(frame->sizePolicy().hasHeightForWidth());
frame->setSizePolicy(sizePolicy);
frame->setFrameShape(QFrame::StyledPanel);
frame->setFrameShadow(QFrame::Raised);

verticalLayout_2->addWidget(frame);

tabWidget->addTab(tab_3, QString());
tab_4 = new QWidget();
tab_4->setObjectName(QString::fromUtf8("tab_4"));
verticalLayout_3 = new QVBoxLayout(tab_4);
verticalLayout_3->setSpacing(6);
verticalLayout_3->setContentsMargins(11, 11, 11, 11);
verticalLayout_3->setObjectName(QString::fromUtf8("verticalLayout_3"));
frame_2 = new QFrame(tab_4);
frame_2->setObjectName(QString::fromUtf8("frame_2"));
frame_2->setFrameShape(QFrame::StyledPanel);
frame_2->setFrameShadow(QFrame::Raised);

verticalLayout_3->addWidget(frame_2);

tabWidget->addTab(tab_4, QString());

verticalLayout->addWidget(tabWidget);

retranslateUi(TestSizeClass);

tabWidget->setCurrentIndex(1);

QMetaObject::connectSlotsByName(TestSizeClass);
}


Thanks really much!

[martinn]

Anyone got an idea on this?

[john_god]

Not sure if I understand you, but did you try currentChanged (http://qt.nokia.com/doc/4.2/qtabwidget.html#currentChanged) ?

[Kevin Hoang]

Try to use contentsRect function.