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Section: Free Widget Foundation (3)
Updated:
Index 

NAME

XfwfButton 

DESCRIPTION

The XfwfButton widget is a simple button with asingle callback activate_callback. Except for thatcallback, all resources are inherited from theXfwfLabel widget. Subclasses provide buttons ofother, more specialized types. XfwfButton inheritsits 3D frame from XfwfFrame, the locationspecification resources from XfwfBoard and themulti-line label from XfwfLabel.

The implementation is also very simple, since nearlyall code is inherited from XfwfLabel. There are nonew or redefined methods. In fact, just six lines ofactual code suffice to implement the widget: ObjectOriented Programming at its best!

 

Public variables

XfwfButton Name Class Type Default XtNactivate XtCActivate Callback NULL XtNenter XtCEnter Callback NULL XtNleave XtCLeave Callback NULL

XtNactivate

The activate is invoked from the activateaction, which is normally bound to a mouse click. Thecall_data argument of the callbacks routines isfilled with a pointer to the event that triggered theaction.

        

<Callback> XtCallbackList activate = NULL

XtNenter

The enter callback is invoked on an EnterNotify event.

        

<Callback> XtCallbackList enter = NULL

XtNleave

The leave callback is invoked on an LeaveNotify event.

        

<Callback> XtCallbackList leave = NULL

XtNframeWidth

The default frameWidth is set to 2 pixels.

        

Dimension frameWidth = 2

XtNtraversalOn

In contrast to its superclass XfwfLabel, a buttonusually takes part in keyboard traversal.

        

 traversalOn = True 

XfwfLabel Name Class Type Default XtNlabel XtCLabel String NULL XtNtablist XtCTablist String NULL XtNfont XtCFont FontStruct XtDefaultFont XtNforeground XtCForeground Pixel XtDefaultForeground XtNhlForeground XtCHlForeground Pixel XtDefaultForeground XtNalignment XtCAlignment Alignment 0 XtNtopMargin XtCTopMargin Dimension 2 XtNbottomMargin XtCBottomMargin Dimension 2 XtNleftMargin XtCLeftMargin Dimension 2 XtNrightMargin XtCRightMargin Dimension 2 XtNshrinkToFit XtCShrinkToFit Boolean False XtNrvStart XtCRvStart Int 0 XtNrvLength XtCRvLength Int 0 XtNhlStart XtCHlStart Int 0 XtNhlLength XtCHlLength Int 0

XfwfBoard Name Class Type Default XtNabs_x XtCAbs_x Position 0 XtNrel_x XtCRel_x Float "0.0" XtNabs_y XtCAbs_y Position 0 XtNrel_y XtCRel_y Float "0.0" XtNabs_width XtCAbs_width Position 0 XtNrel_width XtCRel_width Float "1.0" XtNabs_height XtCAbs_height Position 0 XtNrel_height XtCRel_height Float "1.0" XtNhunit XtCHunit Float "1.0" XtNvunit XtCVunit Float "1.0" XtNlocation XtCLocation String NULL

XfwfFrame Name Class Type Default XtNcursor XtCCursor Cursor None XtNframeType XtCFrameType FrameType XfwfRaised XtNframeWidth XtCFrameWidth Dimension 0 XtNouterOffset XtCOuterOffset Dimension 0 XtNinnerOffset XtCInnerOffset Dimension 0 XtNshadowScheme XtCShadowScheme ShadowScheme XfwfAuto XtNtopShadowColor XtCTopShadowColor Pixel compute_topcolor XtNbottomShadowColor XtCBottomShadowColor Pixel compute_bottomcolor XtNtopShadowStipple XtCTopShadowStipple Bitmap NULL XtNbottomShadowStipple XtCBottomShadowStipple Bitmap NULL

XfwfCommon Name Class Type Default XtNtraversalOn XtCTraversalOn Boolean True XtNhighlightThickness XtCHighlightThickness Dimension 2 XtNhighlightColor XtCHighlightColor Pixel XtDefaultForeground XtNhighlightPixmap XtCHighlightPixmap Pixmap None XtNnextTop XtCNextTop Callback NULL XtNuserData XtCUserData Pointer NULL

Composite Name Class Type Default XtNchildren XtCChildren WidgetList NULL insertPosition XtCInsertPosition XTOrderProc NULL numChildren XtCNumChildren Cardinal 0

Core Name Class Type Default XtNx XtCX Position 0 XtNy XtCY Position 0 XtNwidth XtCWidth Dimension 0 XtNheight XtCHeight Dimension 0 borderWidth XtCBorderWidth Dimension 0 XtNcolormap XtCColormap Colormap NULL XtNdepth XtCDepth Int 0 destroyCallback XtCDestroyCallback XTCallbackList NULL XtNsensitive XtCSensitive Boolean True XtNtm XtCTm XTTMRec NULL ancestorSensitive XtCAncestorSensitive Boolean False accelerators XtCAccelerators XTTranslations NULL borderColor XtCBorderColor Pixel 0 borderPixmap XtCBorderPixmap Pixmap NULL background XtCBackground Pixel 0 backgroundPixmap XtCBackgroundPixmap Pixmap NULL mappedWhenManaged XtCMappedWhenManaged Boolean True XtNscreen XtCScreen Screen * NULL

 

Translations

By default, the activate action is bound to amouse click and to the Enter key.

        

<Btn1Down>: set_shadow(sunken) 

<Btn1Down>,<Btn1Up>: activate() set_shadow() 

Button1<Leave>: set_shadow() leave() 

<Key>Return: set_shadow(sunken) activate() set_shadow() 

<EnterNotify>: enter() 

<LeaveNotify>: leave() 

 

Actions

activate

The activate action just calls the activatecallback functions, passing the XEvent pointer inthe call_data argument.

void activate($, XEvent* event, String* params, Cardinal* num_params){    XtCallCallbackList($, $activate, event);}

enter

void enter($, XEvent* event, String* params, Cardinal* num_params){    XtCallCallbackList($, $enter, event);}

leave

void leave($, XEvent* event, String* params, Cardinal* num_params){    XtCallCallbackList($, $leave, event);}

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Index

NAME

DESCRIPTION

Public variables

Translations

Actions

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