Athena Widget Set - C Language Interface - X Consortium ... - X.Org

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Creating New Widgets(Subclassing)extern TemplateClassRec templateClassRec;typedef struct {/* resources */char* resource;/* private state */} TemplatePart;typedef struct _TemplateRec {CorePart core;TemplatePart template;} TemplateRec;#endif /* _TemplateP_h */The private header file includes the private header file of its superclass, therebyexposing the entire internal structure of the widget. It may not always be advantageousto do this; your own project development style will dictate the appropriatelevel of detail to expose in each module.The "WindowWidget" needs to declare two fields in its instance structure to holdthe drawing colors, a resource field for the font and a field for the expose and userinput callback lists:typedef struct {/* resources */Pixel color_1;Pixel color_2;XFontStruct* font;XtCallbackList expose_callback;XtCallbackList input_callback;/* private state *//* (none) */} WindowPart;Widget Source FileThe source code file implements the widget class itself. The unique part of this fileis the declaration and initialization of the widget class record structure and thedeclaration of all resources and action routines added by the widget class.The contents of the Template implementation file, < X11/Xaw/Template.c >, are:/* Copyright (c) X Consortium 1987, 1988*/#include #include #include "TemplateP.h"131
Creating New Widgets(Subclassing)static XtResource resources[] = {#define offset(field) XtOffsetOf(TemplateRec, template.field)/* {name, class, type, size, offset, default_type, default_addr}, */{ XtNtemplateResource, XtCTemplateResource, XtRTemplateResource,sizeof(char*), offset(resource), XtRString, (XtPointer) "default" },#undef offset};static void TemplateAction(/* Widget, XEvent*, String*, Cardinal* */);static XtActionsRec actions[] ={/* {name, procedure}, */{"template", TemplateAction},};static char translations[] =" : template(\|) \\n\\";TemplateClassRec templateClassRec = {{ /* core fields *//* superclass */ (WidgetClass) &widgetClassRec,/* class_name */ "Template",/* widget_size */ sizeof(TemplateRec),/* class_initialize */ NULL,/* class_part_initialize */ NULL,/* class_inited */ FALSE,/* initialize */ NULL,/* initialize_hook */ NULL,/* realize */ XtInheritRealize,/* actions */ actions,/* num_actions */ XtNumber(actions),/* resources */ resources,/* num_resources */ XtNumber(resources),/* xrm_class */ NULLQUARK,/* compress_motion */ TRUE,/* compress_exposure */ TRUE,/* compress_enterleave */ TRUE,/* visible_interest */ FALSE,/* destroy */ NULL,/* resize */ NULL,/* expose */ NULL,/* set_values */ NULL,/* set_values_hook */ NULL,/* set_values_almost */ XtInheritSetValuesAlmost,/* get_values_hook */ NULL,/* accept_focus */ NULL,/* version */ XtVersion,/* callback_private */ NULL,/* tm_table */ translations,/* query_geometry */ XtInheritQueryGeometry,/* display_accelerator */ XtInheritDisplayAccelerator,/* extension */ NULL132
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Athena Widget Set -C Language Inter
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Table of Contents1. Athena Widgets
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Athena Widget Set -C Language Inter
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Athena Widgetsand The Intrinsicswid
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Athena Widgetsand The Intrinsics•
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Athena Widgetsand The IntrinsicsDRD
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Using Widgetsapplication_classoptio
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Using WidgetsName Class Type Defaul
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Using Widgetsapp_contextSpecifies t
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Using Widgetsnum_argsSpecifies the
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Using Widgets6. When the argument l
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Using Widgetseither the name used t
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Using WidgetsArg arglist[10];arglis
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Simple WidgetsSuperclass LabelResou
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Simple Widgets• Processing applic
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Simple WidgetsName Class Type Notes
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Simple WidgetsResourceswill allow i
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Simple WidgetsResourcesWhen creatin
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Simple WidgetsforegroundA pixel val
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Simple WidgetsresizeSpecifies a Boo
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Simple WidgetssliderWidthPanner Act
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Simple WidgetsRepeater ActionsThe R
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Simple Widgetsbacks and passes eith
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Simple WidgetsSimple Widget\ * reso
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Simple WidgetsResourcesThe StripCha
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Simple Widgetsvoid(*getValueProc)(
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Simple Widgetsnotify()When the Togg
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Chapter 4. MenusThe Athena widget s
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MenusNotify(\|)Called when the user
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MenusleftBitmaprightBitmapThis is a
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Chapter 5. Text WidgetsThe Text wid
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Text Widgetswill be insensitive and
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Text WidgetsTwoThreeFourFiveSelect
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Text Widgetsscroll-one-line-up()scr
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Text Widgetskill-to-end-of-paragrap
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Text Widgetsreconnect-im()The popup
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Text WidgetsText FunctionsLeft: bac
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Text Widgetsint XawTextReplace( w,
Page 85 and 86: Text WidgetsCalling this function i
Page 87 and 88: Text WidgetsClass Header fileClassC
Page 89 and 90: Text WidgetsResourcesClass Name Tex
Page 91 and 92: Text WidgetsClearing Portions of th
Page 93 and 94: Text WidgetsFinding the Size of the
Page 95 and 96: Text WidgetsXawTextPosition Read( w
Page 97 and 98: Text Widgetstypevalue_returnlength_
Page 99 and 100: Text WidgetsResourcesSuperclass Tex
Page 101 and 102: Text WidgetsBoolean XawAsciiSaveAsF
Page 103 and 104: Text WidgetsName Class Type Notes D
Page 105 and 106: Chapter 6. Composite and Constraint
Page 107 and 108: Composite and ConstraintWidgetsName
Page 111 and 112: Composite and ConstraintWidgetsLayo
Page 113 and 114: Composite and ConstraintWidgets{Wid
Page 117 and 118: Composite and ConstraintWidgetsAppl
Page 123 and 124: Composite and ConstraintWidgets: Gr
Page 125 and 126: Composite and ConstraintWidgetsReso
Page 129 and 130: Composite and ConstraintWidgetsAppl
Page 131 and 132: Composite and ConstraintWidgetsLayo
Page 133 and 134: Creating New Widgets(Subclassing)It
Page 135: Creating New Widgets(Subclassing)dr
Page 139 and 140: Creating New Widgets(Subclassing)In
Page 141: AcknowledgmentsDonna ConverseMIT X
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Athena Widget Set - C Language Interface - X Consortium ... - X.Org

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