QPushButton *button2 = new QPushButton( 'Two') QPushButton *button1 = new QPushButton( 'One') The following code creates a QHBoxLayout that manages the geometry of five QPushButtons, as shown on the first screenshot above:

A QFormLayout lays out widgets in a 2-column descriptive label- field style.

A QGridLayout lays out widgets in a two-dimensional grid.

A QVBoxLayout lays out widgets in a vertical column, from top to bottom.

A QHBoxLayout lays out widgets in a horizontal row, from left to right (or right to left for right-to-left languages).

To create more complex layouts, you can nest layout managers inside each other. They take care of geometry management for a set of widgets. These classes inherit from QLayout, which in turn derives from QObject (not QWidget). The easiest way to give your widgets a good layout is to use the built-in layout managers: QHBoxLayout, QVBoxLayout, QGridLayout, and QFormLayout. Horizontal, Vertical, Grid, and Form Layouts Stack of widgets where only one widget is visible at a time Layout attribute describing horizontal and vertical resizing policy Layout where one can anchor widgets together in Graphics View Represents an anchor between two items in a QGraphicsAnchorLayout Manages forms of input widgets and their associated labels Lines up child widgets horizontally or verticallyĬontainer to organize groups of button widgets Qt Designer is useful to use when experimenting with the design of a form since it avoids the compile, link and run cycle usually involved in user interface development. The code generated for forms created using Qt Designer also uses the layout classes. Qt's layout classes were designed for hand-written C++ code, allowing measurements to be specified in pixels for simplicity, so they are easy to understand and use.

Font size, text or other contents of child widgets.

Automatic updates when contents change:.

When a layout is set on a widget in this way, it takes charge of the following tasks: The QWidget::setLayout() function applies a layout to a widget. These layouts automatically position and resize widgets when the amount of space available for them changes, ensuring that they are consistently arranged and that the user interface as a whole remains usable.Īll QWidget subclasses can use layouts to manage their children.

Qt includes a set of layout management classes that are used to describe how widgets are laid out in an application's user interface. The Qt layout system provides a simple and powerful way of automatically arranging child widgets within a widget to ensure that they make good use of the available space.

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