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

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Text WidgetsResourcesApplication Header file Class Header file ClasstextSrcObjectClassClass NameTextSrcSuperclassObjectThe TextSrc object is the root object for all text sources. Any new text source objectsshould be subclasses of the TextSrc Object. The TextSrc Class contains all methodsthe Text widget expects a text source to export.Since all text sources will have some resources in common the TextSrc defines afew new resources.When creating an TextSrc object instance, the following resources are retrievedfrom the argument list or from the resource database:Name Class Type Notes Default Valuedestroy-CallbackCallback XtCallbackList NULLeditType EditType EditMode NULLSubclassing the TextSrcThe only purpose of the TextSrc Object is to be subclassed. It contains the minimumset of class methods that all text sources must have. All class methods of the TextSrcmust be defined, as the Text widget uses them all. While all may be inherited, thedirect descendant of TextSrc must specify some of them as TextSrc does not containenough information to be a valid text source by itself. Do not try to use the TextSrcas a valid source for the Text widget; it is not intended to be used as a source byitself and bad things will probably happen.Reading Text.Function Inherit with Public Interface must specifyRead XtInheritRead XawTextSourceReadReplace XtInheritReplace XawTextSourceReplaceScan XtInheritScan XawTextSourceScanSetSelectionConvertSelectionSearch XtInheritSearch XawTextSourceSearchXtInheritSetSelectionXawTextSourceSetSelectionXtInheritConvertSelectionXawTextSource-ConvertSelectionTo read the text in a text source use the Read function:yesnoyesnonono89
Text WidgetsXawTextPosition Read( w, pos, *text_return, length);wpostextlengthSpecifies the TextSrc object.Specifies the position of the first character to be read fromthe text buffer.Returns the text read from the source.Specifies the maximum number of characters the TextSrcshould return to the application in text_return.This function returns the text position immediately after the characters read fromthe text buffer. The function is not required to read length characters if that manycharacters are in the file, it may break at any point that is convenient to the internalstructure of the source. It may take several calls to Read before the desired portionof the text buffer is fully retrieved.Replacing Text.To replace or edit the text in a text buffer use the Replace function:XawTextPosition Replace( w, end, *text);wstartendtextSpecifies the TextSrc object.Specifies the position of the first character to be removed from the textbuffer. This is also the location to begin inserting the new text.Specifies the position immediately after the last character to be removedfrom the text buffer.Specifies the text to be added to the text source.This function can return any of the following values:XawEditDoneXawPositionErrorXawEditErrorThe text replacement was successful.The edit mode is XawtextAppend and start is not the last characterof the source.Either the Source was read-only or the range to be deleted islarger than the length of the Source.The Replace arguments start and end represent the text source character positionsfor the existing text that is to be replaced by the text in the text block. Thecharacters from start up to but not including end are deleted, and the buffer specifiedby the text block is inserted in their place. If start and end are equal, no textis deleted and the new text is inserted after start.Scanning the TextSrcTo search the text source for one of the predefined boundary types use the Scanfunction:XawTextPosition Scan( w, position, type, dir, count, include);wSpecifies the TextSrc object.90
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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 WidgetsName Class Type Notes
Page 43 and 44: Simple WidgetssliderWidthPanner Act
Page 45 and 46: Simple WidgetsName Class Type Notes
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 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: Text WidgetsFinding the Size of the
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 and 136: Creating New Widgets(Subclassing)dr
Page 137 and 138: Creating New Widgets(Subclassing)st
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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