Simple,Basic Tips for QT Programming

My tidbits..from frlirting with qt..its cute.. :-P

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Simple method to disable QDialog window resize using QLayout

To disable the resizing of the window, a simple method is to use the setSizeConstraint function of the Layout.

To do this get the layout from the window first.

QDialog *myWindow = new QDialog;

QLayout *myLayout = myWindow->layout();

Then set the SizeConstraint property to fixed size using SetFixedSize enum of QLayout class. So that The window size is set to sizeHint(); it cannot be resized at all.

myLayout->setSizeConstraint(QLayout::SetFixedSize);

Done!!! :)

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How to use QTabWidget

Declaration and Adding Tabs

QTabWidget MainIFaceTab = new QTabWidget(this); MainIFaceTab->addTab(new QWidget(),"Tab1"); MainIFaceTab->addTab(new QWidget(),"Tab2");"

Getting widget back from a tab

QWidget *wgt = MainIFaceTab->widget(0); //Returns widget of Tab1(Index starts from 0)

Setting a widget to Tab

We need to 1. Create a layout. 2. Add the widget to be set to the layout 3. Set the layout to the returned widget from Tab.

QWidget *wgt = MainIFaceTab->widget(0); //Returns widget of Tab1(Index starts from 0) QVBoxLayout *vBoxLay = new QVBoxLayout; //create layout vBoxLay->addWidget(qTable); //Adds a table widget to the layout wgt->setLayout(vBoxLay); //Set the layout with the table to the returned widget.

[qtqanda-blog]

How to set column size to contents of QTableWidget

To resize the column according to the contents use the resizeColumnsToContents() function

Example:

QTableWidget *qTable = new QTableWidget();

qTable ->resizeColumnsToContents();

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QTableWidget Header Setting

Setting Header Labels Example

QStringList qslHeaders;

QTableWidget * qTablewidget

= new QTableWidget();

qslHeaders<<"Name"<<"User Name";

qTablewidget->setHorizontalHeaderLabels(qslHeaders);