NAME

XmToggleButtonGadget — the ToggleButtonGadget widget class. 

SYNOPSIS

#include <Xm/ToggleBG.h>

DESCRIPTION

ToggleButtonGadget sets nontransitory state data within an application.  Usually this gadget consists of an indicator (square or diamond) with either text or a pixmap to its right.  However, it can also consist of just text or a pixmap without the indicator. 

The toggle graphics display a 1-of-many or N-of-many selection state.  When a toggle indicator is displayed, a square indicator shows a N-of-many selection state and a diamond indicator shows a 1-of-many selection state. 

ToggleButtonGadget implies a selected or unselected state.  In the case of a label and an indicator, an empty indicator (square or diamond shaped) indicates that ToggleButtonGadget is unselected, and a filled indicator shows that it is selected.  In the case of a pixmap toggle, different pixmaps are used to display the selected/unselected states. 

Normally, mouse button 1 is used to arm and activate the button.  However, if the ToggleButtonGadget resides within a menu, then the mouse button used is determined by the RowColumn resources XmNrowColumnType and XmNwhichButton. 

To accommodate the toggle indicator when created, Label’s resource XmNmarginLeft may be increased. 

Classes

ToggleButtonGadget inherits behavior and resources from Object, RectObj, XmGadget and XmLabelGadget classes. 

The class pointer is xmToggleButtonGadgetClass. 

The class name is XmToggleButtonGadget. 

New Resources

The following table defines a set of widget resources used by the programmer to specify data.  The programmer can also set the resource values for the inherited classes to set attributes for this widget.  To reference a resource by name or by class in a .Xdefaults file, remove the XmN or XmC prefix and use the remaining letters.  To specify one of the defined values for a resource in a .Xdefaults file, remove the Xm prefix and use the remaining letters (in either lower case or upper case, but include any underscores between words).  The codes in the access column indicate if the given resource can be set at creation time (C), set by using XtSetValues (S), retrieved by using XtGetValues (G), or is not applicable (N/A). 

XmNarmCallback
Specifies a list of callbacks that is called when the ToggleButtonGadget is armed. To arm this gadget, press the active mouse button while the pointer is inside the ToggleButtonGadget. For this callback, the reason is XmCR_ARM. 

XmNdisarmCallback
Specifies a list of callbacks that is called when ToggleButtonGadget is disarmed. To disarm this gadget, press and release the active mouse button while the pointer is inside the ToggleButtonGadget. The gadget is also disarmed when the user moves out of the gadget and releases the mouse button when the pointer is outside the gadget. For this callback, the reason is XmCR_DISARM. 

XmNfillOnSelect
Fills the indicator with the color specified in XmNselectColor and switches the top and bottom shadow colors when set to True.  Otherwise, it switches only the top and bottom shadow colors. 

XmNindicatorOn
Specifies that a toggle indicator is drawn to the left of the toggle text or pixmap when set to True.  When set to False, no space is allocated for the indicator, and it is not displayed.  If XmNindicatorOn is True, the indicator shadows are switched when the button is selected or unselected, but any shadows around the entire gadget are not switched.  However, if XmNindicatorOn is False, any shadows around the entire gadget are switched when the toggle is selected or unselected. 

XmNindicatorType
Specifies if the indicator is a 1-of or N-of indicator.  For the 1-of indicator, the value is XmONE_OF_MANY.  For the N-of indicator, the value is XmN_OF_MANY.  The N-of-many is a square-shaped indicator.  The 1-of-many is a diamond-shaped indicator.  This resource only specifies the visuals and does not enforce the behavior.  When the ToggleButtonGadget is in a RadioBox, the parent forces this resource to XmONE_OF_MANY. 

XmNselectColor
Allows the application to specify what color fills the center of the square or diamond indicator when it is set. If this color is the same as either the top or bottom shadow color of the indicator, a one-pixel-wide margin is left between the shadows and the fill; otherwise, it is filled completely. This resource’s default for a color display is a color between the background and bottom shadow color.  For a monochrome display, the default is set to the foreground color.

XmNselectInsensitivePixmap
Specifies a pixmap used as the button face when the ToggleButtonGadget is selected and the button is insensitive if the LabelGadget resource XmNlabelType is XmPIXMAP.  If the ToggleButtonGadget is unselected and the button is insensitive, the pixmap in XmNlabelInsensitivePixmap is used as the button face. 

XmNselectPixmap
Specifies the pixmap to be used as the button face if XmNlabelType is XmPIXMAP and the ToggleButtonGadget is selected.  When the ToggleButtonGadget is unselected, the pixmap specified in Label’s XmNlabelPixmap is used. 

XmNset
Displays the button in its selected state if set to True. This shows some conditions as active when a set of buttons first appear.

XmNspacing
Specifies the amount of spacing between the toggle indicator and the toggle label (text or pixmap).

XmNvalueChangedCallback
Specifies a list of callbacks that is called when the ToggleButtonGadget value is changed.  To change the value, press and release the active mouse button while the pointer is inside the ToggleButtonGadget.  This action also causes the gadget to be disarmed. For this callback, the reason is XmCR_VALUE_CHANGED. 

XmNvisibleWhenOff
Indicates that the toggle indicator is visible in the unselected state when the Boolean value is True. When the ToggleButtonGadget is in a menu, the RowColumn parent forces this resource to False.  When the ToggleButtonGadget is in a RadioBox, the parent forces this resource to True.

Inherited Resources

ToggleButtonGadget inherits behavior and resources from the following superclasses.  For a complete description of these resources, refer to the man page for that superclass. 

Callback Information

The following structure is returned with each callback:

typedef struct
{
intreason;
XEvent∗ event;
Booleanset;
} XmToggleButtonCallbackStruct;

reasonIndicates why the callback was invoked. 

eventPoints to the XEvent that triggered the callback. 

setReflects the ToggleButtonGadget’s current state when the callback occurred, either True (selected) or False (unselected). 

Behavior

ToggleButtonGadget is associated with the default behavior unless it is part of a menu system.  In a menu system, the RowColumn parent determines which mouse button is used. 

Default Behavior

<Btn1Down>:
(if unset): This action arms the ToggleButtonGadget.  The indicator shadow is drawn so that the button looks depressed, and the indicator fills with the color specified in XmNselectColor.  The callbacks for XmNarmCallback are also called. 

(if set):  This action arms the ToggleButtonGadget.  The indicator shadow is drawn so that the button looks raised, and the indicator fills with the background color.  The callbacks for XmNarmCallback are also called. 

<Btn1Up>:

(In Button):

(if unset):  This action selects the ToggleButtonGadget.  Visually, it appears the same as when it is armed.  The callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

(if set):  This action unselects the ToggleButtonGadget.  Visually, it appears the same as when it is armed.  The callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

(Outside Of Button):

If the button release occurs outside of the ToggleButtonGadget, the callbacks for XmNdisarmCallback are called. 

<Leave Window>:
If the button is pressed and the cursor leaves the gadget, it visually reverts to its previous unpressed state.

<Enter Window>:
If the button is pressed and the cursor leaves and reenters the gadget, it visually appears the same as when the button was first armed.

Default PopupMenu System

<Btn3Down>:
This action disables keyboard traversal for the menu and returns the user to drag mode, which is the mode in which the menu is manipulated by using the mouse. This action also causes the ToggleButtonGadget to be armed. A shadow is drawn around the ToggleButtonGadget. The callbacks for XmNarmCallback are also called. 

<Btn3Up>:
(if unset):  This action selects the ToggleButtonGadget.  The indicator shadow is drawn so that it looks depressed, and the indicator fills with the color specified in XmNselectColor.  The menu is then unposted and the callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

(if set):  This action unselects the ToggleButtonGadget.  The indicator shadow is drawn so that it looks raised, and the indicator fills with the background color.  The menu is then unposted and the callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

<Leave Window>:
Pressing button two and moving the cursor out of the widget’s window erases the shadow around the ToggleButtonGadget. This event is ignored if keyboard traversal is enabled in the menu.

<Enter Window>:
Pressing button two and moving the cursor into the widget’s window draws a shadow around the ToggleButtonGadget. This event is ignored if keyboard traversal is enabled in the menu.

<Key>Return:
If keyboard traversal is enabled in the menu, this event sets or unsets the ToggleButtonGadget.

(if unset):  The ToggleButtonGadget gets set.  The indicator shadow is drawn so that looks depressed, and the indicator fills with the color specified in XmNselectColor. 

(if set):  The ToggleButtonGadget gets unset.  The indicator shadow is drawn so that it looks raised, and the indicator fills with the background color. 

For both set and unset cases, the menu is then unposted and the callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

Default PulldownMenu System and OptionMenu System

<Btn1Down>:
This action disables keyboard traversal for the menu and returns the user to drag mode (the mode in which the menu is manipulated using the mouse). This action also arms the ToggleButtonGadget.  A shadow is drawn around the ToggleButtonGadget. The callbacks for XmNarmCallback are also called. 

<Btn1Up>:
(if unset):  This action selects the ToggleButtonGadget.  The indicator shadow is drawn so that it looks depressed, and the indicator fills with the color specified in XmNselectColor.  The menu then unposts, and the callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

(if set):  This action unselects the ToggleButtonGadget.  The indicator shadow is drawn so that it looks raised, and the indicator fills with the background color.  The menu then unposts, and the callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

<Leave Window>:
Pressing button one and moving the cursor out of the widget’s window erases the shadow around the ToggleButtonGadget. This event is ignored if keyboard traversal is enabled in the menu.

<Enter Window>:
Pressing button one and moving the cursor into the widget’s window draws a shadow around the ToggleButtonGadget. This event is ignored if keyboard traversal is enabled in the menu.

<Key>Return:
This event sets or unsets the ToggleButtonGadget if keyboard traversal is enabled in the menu.

(if unset): The ToggleButtonGadget gets set.  The indicator shadow is drawn so that it looks depressed, and the indicator fills with the color specified in XmNselectColor. 

(if set):  The ToggleButtonGadget gets unset.  The indicator shadow is drawn so that it looks raised, and the indicator fills with the background color. 

For both set and unset cases, the menu then unposts, and the callbacks for XmvalueChangedCallback are called, followed by callbacks for XmdisarmCallback. 

Keyboard Traversal

For information on keyboard traversal when not in a menu system, see the man page for XmGadget(3Xm) and its sections on behavior and default translations.  When the ToggleButtonGadget is in a menu system, the keyboard traversal translations are defined by the RowColumn parent. 

RELATED INFORMATION

Object(3Xm), RectObj(3Xm), XmCreateToggleButtonGadget(3Xm), XmGadget(3Xm), XmLabelGadget(3Xm), XmRowColumn(3Xm), XmToggleButtonGadgetGetState(3Xm), and XmToggleButtonGadgetSetState(3Xm). 

7th Edition