OSF/Motif

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-shaped) with either text or a pixmap on one side of it.  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 an N-of-many selection state and a diamond-shaped 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. 

The default behavior associated with a ToggleButtonGadget in a menu depends on the type of menu system in which it resides.  By default, BSelect controls the behavior of the ToggleButtonGadget.  In addition, BMenu controls the behavior of the ToggleButtonGadget if it resides in a PopupMenu system.  The actual mouse button used is determined by its RowColumn parent. 

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 lowercase or uppercase, 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 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.  The default is set to the value of XmNindicatorOn.  When XmNindicatorOn is False, and XmNfillOnSelect is set explicitly to True, the background is filled with the color specified by XmNselectColor. 

XmNindicatorOn
Specifies that a toggle indicator is drawn to one side 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. 

XmNindicatorSize
Sets the size of the indicator. If no value is specified, the size of the indicator is based on the size of the label string or pixmap. If the label string or pixmap changes, the size of the indicator is recomputed based on the size of the label string or pixmap. Once a value has been specified for XmNindicatorSize, the indicator has that size, regardless of the size of the label string or pixmap, until a new value is specified. 

XmNindicatorType
Specifies if the indicator is a 1-of or an 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 indicator is square.  The 1-of-many indicator is diamond-shaped.  This resource specifies only the visuals and does not enforce the behavior.  When the ToggleButtonGadget is in a RadioBox, the default is XmONE_OF_MANY; otherwise, the default is XmN_OF_MANY. 

XmNselectColor
Allows the application to specify what color fills the center of the square or diamond-shaped indicator when it is set.  If this color is the same as either the top or the 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 the bottom shadow color.  For a monochrome display, the default is set to the foreground color.  To set the background of the button to XmNselectColor when XmNindicatorOn is False, the value of XmNfillOnSelect must be explicitly set to True. 

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.  If no value is specified for XmNlabelInsensitivePixmap, that resource is set to the value specified for XmNselectInsensitivePixmap. 

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 LabelGadget’s XmNlabelPixmap is used.  If no value is specified for XmNlabelPixmap, that resource is set to the value specified for XmNselectPixmap. 

XmNsetRepresents the state of the ToggleButton.  A value of false indicates that the ToggleButton is not set.   A value of true indicates that the ToggleButton is set.  Setting this resource sets the state of the ToggleButton. 

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

XmNvalueChangedCallback
Specifies a list of callbacks 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 default value is False. When the ToggleButtonGadget is in a RadioBox, the default value is True.

Inherited Resources

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

Callback Information

A pointer to the following structure is passed to each callback:

typedef struct
{
intreason;
XEvent∗ event;
intset;
} 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

XmToggleButtonGadget includes behavior from XmGadget.  XmToggleButtonGadget includes menu traversal behavior from XmLabelGadget.  Additional XmToggleButtonGadget behavior is described below:

BDrag Press:
Drags the contents of a ToggleButtonGadget label, identified by pressing BDrag.  This action creates a DragContext object whose XmNexportTargets resource is set to "COMPOUND_TEXT" for a label type of XmSTRING; otherwise, "PIXMAP" if the label type is XmPIXMAP.  This action is undefined for ToggleButtonGadgets used in a menu system. 

BSelect Press:
In a menu, this action unposts any menus posted by the ToggleButtonGadget’s parent menu, disables keyboard traversal for the menu, and enables mouse traversal for the menu. It draws the shadow in the armed state and, unless the button is already armed, calls the XmNarmCallback callbacks.  Outside a menu, if the button was previously unset, this action does the following: If XmNindicatorOn is True, it draws the indicator shadow so that the indicator looks pressed; if XmNfillOnSelect is True, it fills the indicator with the color specified by XmNselectColor.  If XmNindicatorOn is False, it draws the button shadow so that the button looks pressed.  If XmNlabelType is XmPIXMAP, the XmNselectPixmap is used as the button face.  Calls the XmNarmCallback callbacks.  Outside a menu, if the button was previously set, this action does the following: If both XmNindicatorOn and XmNvisibleWhenOff are True, it draws the indicator shadow so that the indicator looks raised; if XmNfillOnSelect is True, it fills the indicator with the background color.  If XmNindicatorOn is False, it draws the button shadow so that the button looks raised.  If XmNlabelType is XmPIXMAP, the XmNlabelPixmap is used as the button face.  Calls the XmNarmCallback callbacks. 

BSelect Release:
In a menu, this action does the following: It unposts all menus in the menu hierarchy. If the ToggleButtonGadget was previously set, unsets it; if the ToggleButtonGadget was previously unset, sets it. It calls the XmNvalueChangedCallback callbacks and then the XmNdisarmCallback callbacks.  If the button is outside a menu and the pointer is within the button, this action does the following: If the button was previously unset, sets it; if the button was previously set, unsets it. Calls the XmNvalueChangedCallback callbacks.  If the button is outside a menu, calls the XmNdisarmCallback callbacks. 

KHelp:In a Pulldown or Popup MenuPane, unposts all menus in the menu hierarchy and, when the shell’s keyboard focus policy is XmEXPLICT, restores keyboard focus to the widget that had the focus before the menu system was entered.  Calls the callbacks for XmNhelpCallback if any exist.  If there are no help callbacks for this widget, this action calls the help callbacks for the nearest ancestor that has them. 

Activate:In a menu, does the following: unposts all menus in the menu hierarchy; unless the button is already armed, calls the XmNarmCallback callbacks; and calls the XmNvalueChangedCallback and XmNdisarmCallback callbacks.  Outside a menu, if the parent is a manager, passes the event to the parent. 

KSelect:If the ToggleButtonGadget was previously set, unsets it; if the ToggleButtonGadget was previously unset, sets it.  In a menu, does the following: Unposts all menus in the menu hierarchy. Unless the button is already armed, calls the XmNarmCallback callbacks.  Calls the XmNvalueChangedCallback and XmNdisarmCallback callbacks.  Outside a menu, if the button was previously unset, this action does the following: If XmNindicatorOn is True, it draws the indicator shadow so that the indicator looks pressed; if XmNfillOnSelect is True, it fills the indicator with the color specified by XmNselectColor.  If XmNindicatorOn is False, it draws the button shadow so that the button looks pressed.  If XmNlabelType is XmPIXMAP, the XmNselectPixmap is used as the button face.  Calls the XmNarmCallback, XmNvalueChangedCallback, XmNdisarmCallback callbacks.  Outside a menu, if the button was previously set, this action does the following: If both XmNindicatorOn and XmNvisibleWhenOff are True, it draws the indicator shadow so that the indicator looks raised; if XmNfillOnSelect is True, it fills the indicator with the background color.  If XmNindicatorOn is False, it draws the button shadow so that the button looks raised.  If XmNlabelType is XmPIXMAP, the XmNlabelPixmap is used as the button face.  Calls the XmNarmCallback, XmNvalueChangedCallback, and XmNdisarmCallback callbacks. 

MAny KCancel:
In a toplevel Pulldown MenuPane from a MenuBar, unposts the menu, disarms the MenuBar CascadeButton and the MenuBar, and, when the shell’s keyboard focus policy is XmEXPLICT, restores keyboard focus to the widget that had the focus before the MenuBar was entered.  In other Pulldown MenuPanes, unposts the menu.  Outside a menu, if the parent is a manager, this action passes the event to the parent.  In a Popup MenuPane, unposts the menu and restores keyboard focus to the widget from which the menu was posted.

<Enter>:In a menu, if keyboard traversal is enabled, this action does nothing.  Otherwise, it draws the shadow in the armed state and calls the XmNarmCallback callbacks.  If the ToggleButtonGadget is not in a menu and the cursor leaves and then reenters the ToggleButtonGadget while the button is pressed, this action restores the button’s armed appearance.

<Leave>:In a menu, if keyboard traversal is enabled, this action does nothing.  Otherwise, it draws the shadow in the unarmed state and calls the XmNdisarmCallback callbacks.  If the ToggleButtonGadget is not in a menu and the cursor leaves the ToggleButtonGadget while the button is pressed, this action restores the button’s unarmed appearance.

Virtual Bindings

The bindings for virtual keys are vendor specific.  For information about bindings for virtual buttons and keys, see VirtualBindings(3X). 

RELATED INFORMATION

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