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

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Text WidgetsCustomizing the Text WidgetThe remainder of this chapter will describe customizing the Text widget. The Textwidget may be customized by subclassing, or by creating new sources and sinks.Subclassing is described in detail in Chapter 7; this section will describe only thosethings that are specific to the Text widget. Attributes of the Text widget base classand creating new sources and sinks will be discussed.The Text widget is made up of a number of different pieces, with the Text widget asthe base widget class. It and the AsciiText widget are the only true "widgets" in theText widget family. The other pieces (sources and sinks) are X Toolkit objects andhave no window associated with them. No source or sink is useful unless assignedto a Text widget.Each of the following pieces of the Text widget has a specific purpose, and will be,or has been, discussed in detail in this chapter:TextTextSinkTextSrcAsciiSinkMultiSinkAsciiSrcMultiSrcThis is the glue that binds everything else together. This widget readsthe text data from the source, and displays the information in the sink.All translations and actions are handled in the Text widget itself.This object is responsible for displaying and clearing the drawing area.It also reports the configuration of the window that contains the drawingarea. The TextSink does not have its own window; instead it doesits drawing on the Text widget's window.This object is responsible for reading, editing and searching throughthe text buffer.This object is a subclass of the TextSink and knows how to display ASCIItext. Support has been added to display any 8-bit character set, giventhe font.This object is a subclass of the TextSink and knows how to display fontsets.This object is a subclass of the TextSrc and knows how to read stringsand files.This object is a subclass of the TextSrc and knows how to read stringsand multibyte files, converting them to wide characters based on locale.AsciiTextText WidgetThis widget is a subclass of the Text widget. When created, the AsciiTextautomatically creates and attaches either an AsciiSrc and AsciiSink,or a MultiSrc and MultiSink, to itself. The AsciiText provides thesimplest interface to the Athena Text widgets.Application Header file81
Text WidgetsClass Header fileClassClass NameSuperclasstextWidgetClassTextSimpleResourcesThe Text widget is the glue that binds all the other pieces together, it maintainsthe internal state of the displayed text, and acts as a mediator between the sourceand sink.This section lists the resources that are actually part of the Text widget, and explainsthe functionality provided by each.When creating a Text widget instance, the following resources are retrieved fromthe argument list or from the resource database:Name Class Type Notes Default Valueaccelerators Accelerators AcceleratorTableancestorSensitiveAncestorSensitiveNULLBoolean D TrueautoFill AutoFill Boolean Falsebackground Background Pixel XtDefault-Backgroundbackground-PixmapPixmap Pixmap XtUnspecifiedPixmapborderColor BorderColor Pixel XtDefault-ForegroundborderWidth BorderWidth Dimension 1bottomMargin Margin Position 2colormap Colormap Colormap Parent'sColormapcursor Cursor Cursor XC_xtermcursorName Cursor String NULLdepth Depth int C Parent's DepthborderPixmap Pixmap Pixmap XtUnspecifiedPixmapdestroy-CallbackCallback XtCallbackList NULLdisplayCaret Output Boolean Trueheight Height Dimension A Font height+ marginsdisplayPosition TextPosition XawTextPositioninsensitiveBorderInsensitive Pixmap GreyPixmap082
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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
Page 35 and 36: Simple WidgetsResourcesWhen creatin
Page 37 and 38: Simple WidgetsforegroundA pixel val
Page 39 and 40: Simple WidgetsresizeSpecifies a Boo
Page 41 and 42: Simple WidgetsName Class Type Notes
Page 43 and 44: Simple WidgetssliderWidthPanner Act
Page 47 and 48: Simple WidgetsRepeater ActionsThe R
Page 51 and 52: Simple Widgetsbacks and passes eith
Page 53 and 54: Simple WidgetsSimple Widget\ * reso
Page 55 and 56: Simple WidgetsResourcesThe StripCha
Page 57 and 58: Simple Widgetsvoid(*getValueProc)(
Page 61 and 62: Simple Widgetsnotify()When the Togg
Page 63 and 64: Chapter 4. MenusThe Athena widget s
Page 65 and 66: MenusNotify(\|)Called when the user
Page 67 and 68: MenusleftBitmaprightBitmapThis is a
Page 69 and 70: Chapter 5. Text WidgetsThe Text wid
Page 71 and 72: Text Widgetswill be insensitive and
Page 73 and 74: Text WidgetsTwoThreeFourFiveSelect
Page 75 and 76: Text Widgetsscroll-one-line-up()scr
Page 77 and 78: Text Widgetskill-to-end-of-paragrap
Page 79 and 80: Text Widgetsreconnect-im()The popup
Page 81 and 82: Text WidgetsText FunctionsLeft: bac
Page 83 and 84: Text Widgetsint XawTextReplace( w,
Page 85: Text WidgetsCalling this function i
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
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Page 125 and 126: Composite and ConstraintWidgetsReso
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Page 133 and 134: Creating New Widgets(Subclassing)It
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Creating New Widgets(Subclassing)st
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Creating New Widgets(Subclassing)In
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AcknowledgmentsDonna ConverseMIT X
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Athena Widget Set - C Language Interface - X Consortium ... - X.Org

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