property bool Active = false;

The property 'Active' stores the current state of the button. As long as the property is 'false', the widget represents the status switched-off and should appear released. As long as the property is 'true', the widget represents the status switched-on and should appear pressed.

Usually this property is used by bistable buttons only, which can toggle its state. Whether the button is bistable or monostable is determined by the button's property ToggleSwitch.

property slot OnChange = null;

The property 'OnChange' can refer to a slot method, which will receive a signal as soon the user has pressed the button. Thereupon the method's logic will be executed.

property slot OnSwitchOff = null;

The property 'OnSwitchOff' can refer to a slot method, which will receive a signal as soon the button has changed its state to 'switched-off' (bistable buttons only). Thereupon the method's logic will be executed.

property slot OnSwitchOn = null;

The property 'OnSwitchOn' can refer to a slot method, which will receive a signal as soon the button has changed its state to 'switched-on' (bistable buttons only). Thereupon the method's logic will be executed.

property ^bool Outlet = null;

The property 'Outlet' provides an interface for the Model-View-Controller (MVC). In the MVC, the widgets (views, controllers) and the application logic (model) are always kept apart. An automatism behind this model ensures, that widgets are notified automatically as soon as the affected model has changed its state. On the other hand, user interactions on a widget cause the affected model to execute the application logic. Usually, a model is a simple Chora object containing several properties and the implementation of onget/onset method.

By assigning a property reference, Outlet establishes a connection between the widget and the model object, the affected property belongs to. After this, the widget is able to read and modify the referred property in response to the user interactions. It is also able to adapt the widget appearance, if the value of the referred property has been modified by another widget or by the application logic itself.

property bool ToggleSwitch = false;

The property 'ToggleSwitch' determines whether the button is bistable or monostable. Bistable buttons have two states: pressed and released. Each time the button is activated by the user, its state is toggled between pressed and released. In contrast, monostable buttons restore the released state immediately as soon the user has released 'his finger from the button's face'.

slot enterLeaveSlot;

This internal slot method is used to receive the corresponding signals form the touch handler.

slot onOkSlot;

This internal slot method is used to receive the corresponding signal form the keyboard handler.

slot outletSlot;

This slot method will receive a signal, if the value of the property assigned to Outlet has been changed by another widget or by the application logic. In response to this notification, the widget will update itself.

slot pressReleaseSlot;

This internal slot method is used to receive the corresponding signals form the touch handler.