PtOnOffButton

An on/off button that can be set or unset

Class hierarchy:

PtWidget -> PtBasic -> PtLabel -> PtButton -> PtOnOffButton

For more information, see the diagram of the widget hierarchy.

PhAB icon:

Public header:

<photon/PtOnOffButton.h>

Description:

A PtOnOffButton widget displays an on/off button that can be set or unset. Instances of this class of widget are typically used in exclusive or nonexclusive groups.

A PtOnOffButton widget.

You can set the position of the text relative to the button with the Pt_ARG_BALLOON_POSITION resource.

New resources:

Pt_ARG_ONOFF_STATE

The current state of the on/off button. If the button is off, this resource is 0; if the button is on, it's nonzero.

Pt_CB_ONOFF_NEW_VALUE

A list of PtCallback_t structures that define the callbacks that the widget invokes when the state of the on/off button changes.

If you've set the Pt_CALLBACKS_ACTIVE bit set in the widget's Pt_ARG_FLAGS resource, these callbacks are also invoked when your application changes the state of the button by calling PtSetResource() or PtSetResources().

Each callback is passed a PtCallbackInfo_t structure that contains at least the following members:

reason

Pt_CB_ONOFF_NEW_VALUE

reason_subtype

0 (not used).

event

A pointer to a PhEvent_t structure that describes the event that caused the callback to be invoked.

cbdata

A pointer to a PtOnOffButtonCallback_t structure that contains at least the following member:

int state;

The current state of the on/off button.

These callbacks should return Pt_CONTINUE.

Inherited resources:

If the widget modifies an inherited resource, the “Default override” column indicates the new value. This modification affects any subclasses of the widget.