2 '\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
4 '\" See the file "license.terms" for information on usage and redistribution
5 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
7 '\" RCS: @(#) $Id: CanvTxtInfo.3,v 1.2 1998/09/14 18:22:46 stanton Exp $
9 '\" The definitions below are for supplemental macros used in Tcl/Tk
12 '\" .AP type name in/out ?indent?
13 '\" Start paragraph describing an argument to a library procedure.
14 '\" type is type of argument (int, etc.), in/out is either "in", "out",
15 '\" or "in/out" to describe whether procedure reads or modifies arg,
16 '\" and indent is equivalent to second arg of .IP (shouldn't ever be
17 '\" needed; use .AS below instead)
20 '\" Give maximum sizes of arguments for setting tab stops. Type and
21 '\" name are examples of largest possible arguments that will be passed
22 '\" to .AP later. If args are omitted, default tab stops are used.
25 '\" Start box enclosure. From here until next .BE, everything will be
26 '\" enclosed in one large box.
29 '\" End of box enclosure.
32 '\" Begin code excerpt.
37 '\" .VS ?version? ?br?
38 '\" Begin vertical sidebar, for use in marking newly-changed parts
39 '\" of man pages. The first argument is ignored and used for recording
40 '\" the version when the .VS was added, so that the sidebars can be
41 '\" found and removed when they reach a certain age. If another argument
42 '\" is present, then a line break is forced before starting the sidebar.
45 '\" End of vertical sidebar.
48 '\" Begin an indented unfilled display.
51 '\" End of indented unfilled display.
54 '\" Start of list of standard options for a Tk widget. The
55 '\" options follow on successive lines, in four columns separated
59 '\" End of list of standard options for a Tk widget.
61 '\" .OP cmdName dbName dbClass
62 '\" Start of description of a specific option. cmdName gives the
63 '\" option's name as specified in the class command, dbName gives
64 '\" the option's name in the option database, and dbClass gives
65 '\" the option's class in the option database.
68 '\" Print arg1 underlined, then print arg2 normally.
70 '\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
72 '\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
76 '\" # Start an argument description
80 . ie !"\\$2"" .TP \\n()Cu
85 \&\\$1 \\fI\\$2\\fP (\\$3)
98 '\" # define tabbing values for .AP
101 .if !"\\$1"" .nr )A \\w'\\$1'u+3n
104 .if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
105 .nr )C \\n()Bu+\\w'(in/out)'u+2n
107 .AS Tcl_Interp Tcl_CreateInterp in/out
108 '\" # BS - start boxed text
109 '\" # ^y = starting y location
117 .if n \l'\\n(.lu\(ul'
120 '\" # BE - end boxed text (draw box now)
125 .ie n \l'\\n(^lu\(ul'
127 .\" Draw four-sided box normally, but don't draw top of
128 .\" box if the box started on an earlier page.
130 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
133 \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
140 '\" # VS - start vertical sidebar
141 '\" # ^Y = starting y location
142 '\" # ^v = 1 (for troff; for nroff this doesn't matter)
146 .ie n 'mc \s12\(br\s0
149 '\" # VE - end of vertical sidebar
157 \h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n'
164 '\" # Special macro to handle page bottom: finish off current
165 '\" # box/sidebar if in box/sidebar mode, then invoked standard
166 '\" # page bottom macro.
173 .\" Draw three-sided box if this is the box's first page,
174 .\" draw two sides but no top otherwise.
175 .ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
176 .el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
179 .nr ^x \\n(^tu+1v-\\n(^Yu
180 \kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c
193 '\" # DS - begin display
199 '\" # DE - end display
205 '\" # SO - start of list of standard options
207 .SH "STANDARD OPTIONS"
213 '\" # SE - end of list of standard options
218 See the \\fBoptions\\fR manual entry for details on the standard options.
220 '\" # OP - start of full description for a single option
225 Command-Line Name: \\fB\\$1\\fR
226 Database Name: \\fB\\$2\\fR
227 Database Class: \\fB\\$3\\fR
231 '\" # CS - begin code excerpt
237 '\" # CE - end code excerpt
245 .TH Tk_CanvasTextInfo 3 4.0 Tk "Tk Library Procedures"
248 Tk_CanvasTextInfo \- additional information for managing text items in canvases
251 \fB#include <tk.h>\fR
254 \fBTk_CanvasGetTextInfo\fR(\fIcanvas\fR)
257 .AP Tk_Canvas canvas in
258 A token that identifies a particular canvas widget.
263 Textual canvas items are somewhat more complicated to manage than
264 other items, due to things like the selection and the input focus.
265 \fBTk_CanvasGetTextInfo\fR may be invoked by a type manager
266 to obtain additional information needed for items that display text.
267 The return value from \fBTk_CanvasGetTextInfo\fR is a pointer to
268 a structure that is shared between Tk and all the items that display
270 The structure has the following form:
272 typedef struct Tk_CanvasTextInfo {
273 Tk_3DBorder \fIselBorder\fR;
274 int \fIselBorderWidth\fR;
275 XColor *\fIselFgColorPtr\fR;
276 Tk_Item *\fIselItemPtr\fR;
277 int \fIselectFirst\fR;
278 int \fIselectLast\fR;
279 Tk_Item *\fIanchorItemPtr\fR;
280 int \fIselectAnchor\fR;
281 Tk_3DBorder \fIinsertBorder\fR;
282 int \fIinsertWidth\fR;
283 int \fIinsertBorderWidth\fR;
284 Tk_Item *\fIfocusItemPtr\fR;
289 The \fBselBorder\fR field identifies a Tk_3DBorder that should be
290 used for drawing the background under selected text.
291 \fIselBorderWidth\fR gives the width of the raised border around
292 selected text, in pixels.
293 \fIselFgColorPtr\fR points to an XColor that describes the foreground
294 color to be used when drawing selected text.
295 \fIselItemPtr\fR points to the item that is currently selected, or
296 NULL if there is no item selected or if the canvas doesn't have the
298 \fIselectFirst\fR and \fIselectLast\fR give the indices of the first
299 and last selected characters in \fIselItemPtr\fR, as returned by the
300 \fIindexProc\fR for that item.
301 \fIanchorItemPtr\fR points to the item that currently has the selection
302 anchor; this is not necessarily the same as \fIselItemPtr\fR.
303 \fIselectAnchor\fR is an index that identifies the anchor position
304 within \fIanchorItemPtr\fR.
305 \fIinsertBorder\fR contains a Tk_3DBorder to use when drawing the
306 insertion cursor; \fIinsertWidth\fR gives the total width of the
307 insertion cursor in pixels, and \fIinsertBorderWidth\fR gives the
308 width of the raised border around the insertion cursor.
309 \fIfocusItemPtr\fR identifies the item that currently has the input
310 focus, or NULL if there is no such item.
311 \fIgotFocus\fR is 1 if the canvas widget has the input focus and
313 \fIcursorOn\fR is 1 if the insertion cursor should be drawn in
314 \fIfocusItemPtr\fR and 0 if it should not be drawn; this field
315 is toggled on and off by Tk to make the cursor blink.
317 The structure returned by \fBTk_CanvasGetTextInfo\fR
318 is shared between Tk and the type managers; typically the type manager
319 calls \fBTk_CanvasGetTextInfo\fR once when an item is created and
320 then saves the pointer in the item's record.
321 Tk will update information in the Tk_CanvasTextInfo; for example,
322 a \fBconfigure\fR widget command might change the \fIselBorder\fR
323 field, or a \fBselect\fR widget command might change the \fIselectFirst\fR
324 field, or Tk might change \fIcursorOn\fR in order to make the insertion
325 cursor flash on and off during successive redisplays.
327 Type managers should treat all of the fields of the Tk_CanvasTextInfo
328 structure as read-only, except for \fIselItemPtr\fR, \fIselectFirst\fR,
329 \fIselectLast\fR, and \fIselectAnchor\fR.
330 Type managers may change \fIselectFirst\fR, \fIselectLast\fR, and
331 \fIselectAnchor\fR to adjust for insertions and deletions in the
332 item (but only if the item is the current owner of the selection or
333 anchor, as determined by \fIselItemPtr\fR or \fIanchorItemPtr\fR).
334 If all of the selected text in the item is deleted, the item should
335 set \fIselItemPtr\fR to NULL to indicate that there is no longer a
339 canvas, focus, insertion cursor, selection, selection anchor, text