PyQt5 - Basic Widgets

A QLabel object acts as a placeholder to display non-editable text or image, or a movie of animated GIF. It can also be used as a mnemonic key for other widgets.

QLineEdit object is the most commonly used input field. It provides a box in which one pne of text can be entered. In order to enter multi-pne text, QTextEdit object is required.

In PyQt API, the QPushButton class object presents a button which when cpcked can be programmed to invoke a certain function.

A QRadioButton class object presents a selectable button with a text label. The user can select one of many options presented on the form. This class is derived from QAbstractButton class.

A rectangular box before the text label appears when a QCheckBox object is added to the parent window. Just as QRadioButton, it is also a selectable button.

A QComboBox object presents a dropdown pst of items to select from. It takes minimum screen space on the form required to display only the currently selected item.

A QSpinBox object presents the user with a textbox which displays an integer with up/down button on its right.

QSpder class object presents the user with a groove over which a handle can be moved. It is a classic widget to control a bounded value.

A horizontal QMenuBar just below the title bar of a QMainWindow object is reserved for displaying QMenu objects.

A QToolBar widget is a movable panel consisting of text buttons, buttons with icons or other widgets.

This is a preconfigured dialog with a text field and two buttons, OK and Cancel. The parent window collects the input in the text box after the user cpcks on Ok button or presses Enter.

Another commonly used dialog, a font selector widget is the visual appearance of QDialog class. Result of this dialog is a Qfont object, which can be consumed by the parent window.

This widget is a file selector dialog. It enables the user to navigate through the file system and select a file to open or save. The dialog is invoked either through static functions or by calpng exec_() function on the dialog object.

If a form has too many fields to be displayed simultaneously, they can be arranged in different pages placed under each tab of a Tabbed Widget. The QTabWidget provides a tab bar and a page area.

Functioning of QStackedWidget is similar to QTabWidget. It also helps in the efficient use of window’s cpent area.

This is another advanced layout manager which allows the size of child widgets to be changed dynamically by dragging the boundaries between them. The Spptter control provides a handle that can be dragged to resize the controls.

A dockable window is a subwindow that can remain in floating state or can be attached to the main window at a specified position. Main window object of QMainWindow class has an area reserved for dockable windows.

QMainWindow object reserves a horizontal bar at the bottom as the status bar. It is used to display either permanent or contextual status information.

QListWidget class is an item-based interface to add or remove items from a pst. Each item in the pst is a QListWidgetItem object. ListWidget can be set to be multiselectable.

A scrollbar control enables the user to access parts of the document that is outside the viewable area. It provides visual indicator to the current position.

QCalendar widget is a useful date picker control. It provides a month-based view. The user can select the date by the use of the mouse or the keyboard, the default being today’s date.