Make App Designer Check Box Turned On By Default
QCheckBox Class
The QCheckBox widget provides a checkbox with a text label. More...
Header: | #include <QCheckBox> |
qmake: | QT += widgets |
Inherits: | QAbstractButton |
- List of all members, including inherited members
Properties
- tristate : bool
Public Functions
Reimplemented Public Functions
Signals
Protected Functions
Reimplemented Protected Functions
Detailed Description
A QCheckBox is an option button that can be switched on (checked) or off (unchecked). Checkboxes are typically used to represent features in an application that can be enabled or disabled without affecting others. Different types of behavior can be implemented. For example, a QButtonGroup can be used to group check buttons logically, allowing exclusive checkboxes. However, QButtonGroup does not provide any visual representation.
The image below further illustrates the differences between exclusive and non-exclusive checkboxes.
Whenever a checkbox is checked or cleared, it emits the signal stateChanged(). Connect to this signal if you want to trigger an action each time the checkbox changes state. You can use isChecked() to query whether or not a checkbox is checked.
In addition to the usual checked and unchecked states, QCheckBox optionally provides a third state to indicate "no change". This is useful whenever you need to give the user the option of neither checking nor unchecking a checkbox. If you need this third state, enable it with setTristate(), and use checkState() to query the current toggle state.
Just like QPushButton, a checkbox displays text, and optionally a small icon. The icon is set with setIcon(). The text can be set in the constructor or with setText(). A shortcut key can be specified by preceding the preferred character with an ampersand. For example:
In this example, the shortcut is Alt+A. See the QShortcut documentation for details. To display an actual ampersand, use '&&'.
Important inherited functions: text(), setText(), text(), pixmap(), setPixmap(), accel(), setAccel(), isToggleButton(), setDown(), isDown(), isOn(), checkState(), autoRepeat(), isExclusiveToggle(), group(), setAutoRepeat(), toggle(), pressed(), released(), clicked(), toggled(), checkState(), and stateChanged().
See also QAbstractButton, QRadioButton, and GUI Design Handbook: Check Box.
Property Documentation
tristate : bool
This property holds whether the checkbox is a tri-state checkbox
The default is false, i.e., the checkbox has only two states.
Access functions:
bool | isTristate () const |
void | setTristate (bool y = true) |
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Make App Designer Check Box Turned On By Default
Source: https://doc.qt.io/qt-5/qcheckbox.html
Posted by: clyburnnotle1973.blogspot.com
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