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1205 lines
32 KiB
1205 lines
32 KiB
4 years ago
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# text.tcl --
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#
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# This file defines the default bindings for Tk text widgets and provides
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# procedures that help in implementing the bindings.
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#
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# Copyright (c) 1992-1994 The Regents of the University of California.
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# Copyright (c) 1994-1997 Sun Microsystems, Inc.
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# Copyright (c) 1998 by Scriptics Corporation.
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#
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# See the file "license.terms" for information on usage and redistribution
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# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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#-------------------------------------------------------------------------
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# Elements of ::tk::Priv that are used in this file:
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#
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# afterId - If non-null, it means that auto-scanning is underway
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# and it gives the "after" id for the next auto-scan
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# command to be executed.
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# char - Character position on the line; kept in order
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# to allow moving up or down past short lines while
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# still remembering the desired position.
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# mouseMoved - Non-zero means the mouse has moved a significant
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# amount since the button went down (so, for example,
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# start dragging out a selection).
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# prevPos - Used when moving up or down lines via the keyboard.
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# Keeps track of the previous insert position, so
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# we can distinguish a series of ups and downs, all
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# in a row, from a new up or down.
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# selectMode - The style of selection currently underway:
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# char, word, or line.
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# x, y - Last known mouse coordinates for scanning
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# and auto-scanning.
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#
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#-------------------------------------------------------------------------
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#-------------------------------------------------------------------------
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# The code below creates the default class bindings for text widgets.
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#-------------------------------------------------------------------------
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# Standard Motif bindings:
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bind Text <1> {
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tk::TextButton1 %W %x %y
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%W tag remove sel 0.0 end
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}
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bind Text <B1-Motion> {
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set tk::Priv(x) %x
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set tk::Priv(y) %y
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tk::TextSelectTo %W %x %y
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}
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bind Text <Double-1> {
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set tk::Priv(selectMode) word
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tk::TextSelectTo %W %x %y
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catch {%W mark set insert sel.first}
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}
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bind Text <Triple-1> {
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set tk::Priv(selectMode) line
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tk::TextSelectTo %W %x %y
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catch {%W mark set insert sel.first}
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}
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bind Text <Shift-1> {
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tk::TextResetAnchor %W @%x,%y
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set tk::Priv(selectMode) char
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tk::TextSelectTo %W %x %y
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}
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bind Text <Double-Shift-1> {
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set tk::Priv(selectMode) word
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tk::TextSelectTo %W %x %y 1
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}
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bind Text <Triple-Shift-1> {
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set tk::Priv(selectMode) line
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tk::TextSelectTo %W %x %y
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}
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bind Text <B1-Leave> {
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set tk::Priv(x) %x
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set tk::Priv(y) %y
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tk::TextAutoScan %W
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}
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bind Text <B1-Enter> {
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tk::CancelRepeat
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}
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bind Text <ButtonRelease-1> {
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tk::CancelRepeat
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}
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bind Text <Control-1> {
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%W mark set insert @%x,%y
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# An operation that moves the insert mark without making it
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# one end of the selection must insert an autoseparator
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if {[%W cget -autoseparators]} {
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%W edit separator
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}
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}
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# stop an accidental double click triggering <Double-Button-1>
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bind Text <Double-Control-1> { # nothing }
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# stop an accidental movement triggering <B1-Motion>
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bind Text <Control-B1-Motion> { # nothing }
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bind Text <<PrevChar>> {
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tk::TextSetCursor %W insert-1displayindices
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}
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bind Text <<NextChar>> {
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tk::TextSetCursor %W insert+1displayindices
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}
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bind Text <<PrevLine>> {
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tk::TextSetCursor %W [tk::TextUpDownLine %W -1]
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}
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bind Text <<NextLine>> {
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tk::TextSetCursor %W [tk::TextUpDownLine %W 1]
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}
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bind Text <<SelectPrevChar>> {
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tk::TextKeySelect %W [%W index {insert - 1displayindices}]
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}
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bind Text <<SelectNextChar>> {
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tk::TextKeySelect %W [%W index {insert + 1displayindices}]
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}
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bind Text <<SelectPrevLine>> {
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tk::TextKeySelect %W [tk::TextUpDownLine %W -1]
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}
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bind Text <<SelectNextLine>> {
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tk::TextKeySelect %W [tk::TextUpDownLine %W 1]
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}
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bind Text <<PrevWord>> {
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tk::TextSetCursor %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord]
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}
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bind Text <<NextWord>> {
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tk::TextSetCursor %W [tk::TextNextWord %W insert]
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}
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bind Text <<PrevPara>> {
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tk::TextSetCursor %W [tk::TextPrevPara %W insert]
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}
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bind Text <<NextPara>> {
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tk::TextSetCursor %W [tk::TextNextPara %W insert]
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}
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bind Text <<SelectPrevWord>> {
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tk::TextKeySelect %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord]
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}
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bind Text <<SelectNextWord>> {
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tk::TextKeySelect %W [tk::TextNextWord %W insert]
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}
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bind Text <<SelectPrevPara>> {
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tk::TextKeySelect %W [tk::TextPrevPara %W insert]
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}
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bind Text <<SelectNextPara>> {
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tk::TextKeySelect %W [tk::TextNextPara %W insert]
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}
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bind Text <Prior> {
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tk::TextSetCursor %W [tk::TextScrollPages %W -1]
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}
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bind Text <Shift-Prior> {
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tk::TextKeySelect %W [tk::TextScrollPages %W -1]
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}
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bind Text <Next> {
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tk::TextSetCursor %W [tk::TextScrollPages %W 1]
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}
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bind Text <Shift-Next> {
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tk::TextKeySelect %W [tk::TextScrollPages %W 1]
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}
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bind Text <Control-Prior> {
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%W xview scroll -1 page
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}
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bind Text <Control-Next> {
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%W xview scroll 1 page
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}
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bind Text <<LineStart>> {
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tk::TextSetCursor %W {insert display linestart}
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}
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bind Text <<SelectLineStart>> {
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tk::TextKeySelect %W {insert display linestart}
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}
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bind Text <<LineEnd>> {
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tk::TextSetCursor %W {insert display lineend}
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}
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bind Text <<SelectLineEnd>> {
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tk::TextKeySelect %W {insert display lineend}
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}
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bind Text <Control-Home> {
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tk::TextSetCursor %W 1.0
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}
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bind Text <Control-Shift-Home> {
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tk::TextKeySelect %W 1.0
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}
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bind Text <Control-End> {
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tk::TextSetCursor %W {end - 1 indices}
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}
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bind Text <Control-Shift-End> {
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tk::TextKeySelect %W {end - 1 indices}
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}
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bind Text <Tab> {
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if {[%W cget -state] eq "normal"} {
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tk::TextInsert %W \t
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focus %W
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break
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}
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}
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bind Text <Shift-Tab> {
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# Needed only to keep <Tab> binding from triggering; doesn't
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# have to actually do anything.
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break
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}
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bind Text <Control-Tab> {
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focus [tk_focusNext %W]
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}
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bind Text <Control-Shift-Tab> {
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focus [tk_focusPrev %W]
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}
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bind Text <Control-i> {
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tk::TextInsert %W \t
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}
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bind Text <Return> {
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tk::TextInsert %W \n
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if {[%W cget -autoseparators]} {
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%W edit separator
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}
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}
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bind Text <Delete> {
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if {[tk::TextCursorInSelection %W]} {
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%W delete sel.first sel.last
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} else {
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if {[%W compare end != insert+1c]} {
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%W delete insert
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}
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%W see insert
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}
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}
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bind Text <BackSpace> {
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if {[tk::TextCursorInSelection %W]} {
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%W delete sel.first sel.last
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} else {
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if {[%W compare insert != 1.0]} {
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%W delete insert-1c
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}
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%W see insert
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}
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}
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bind Text <Control-space> {
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%W mark set [tk::TextAnchor %W] insert
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}
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bind Text <Select> {
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%W mark set [tk::TextAnchor %W] insert
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}
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bind Text <Control-Shift-space> {
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set tk::Priv(selectMode) char
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tk::TextKeyExtend %W insert
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}
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bind Text <Shift-Select> {
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set tk::Priv(selectMode) char
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tk::TextKeyExtend %W insert
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}
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bind Text <<SelectAll>> {
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%W tag add sel 1.0 end
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}
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bind Text <<SelectNone>> {
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%W tag remove sel 1.0 end
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# An operation that clears the selection must insert an autoseparator,
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# because the selection operation may have moved the insert mark
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if {[%W cget -autoseparators]} {
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%W edit separator
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}
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}
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bind Text <<Cut>> {
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tk_textCut %W
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}
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bind Text <<Copy>> {
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tk_textCopy %W
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}
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bind Text <<Paste>> {
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tk_textPaste %W
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}
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bind Text <<Clear>> {
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# Make <<Clear>> an atomic operation on the Undo stack,
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# i.e. separate it from other delete operations on either side
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if {[%W cget -autoseparators]} {
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%W edit separator
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}
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catch {%W delete sel.first sel.last}
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if {[%W cget -autoseparators]} {
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%W edit separator
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}
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}
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bind Text <<PasteSelection>> {
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if {$tk_strictMotif || ![info exists tk::Priv(mouseMoved)]
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|| !$tk::Priv(mouseMoved)} {
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tk::TextPasteSelection %W %x %y
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}
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}
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bind Text <Insert> {
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catch {tk::TextInsert %W [::tk::GetSelection %W PRIMARY]}
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}
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bind Text <KeyPress> {
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tk::TextInsert %W %A
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}
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# Ignore all Alt, Meta, and Control keypresses unless explicitly bound.
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# Otherwise, if a widget binding for one of these is defined, the
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# <KeyPress> class binding will also fire and insert the character,
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# which is wrong. Ditto for <Escape>.
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bind Text <Alt-KeyPress> {# nothing }
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bind Text <Meta-KeyPress> {# nothing}
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bind Text <Control-KeyPress> {# nothing}
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bind Text <Escape> {# nothing}
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bind Text <KP_Enter> {# nothing}
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if {[tk windowingsystem] eq "aqua"} {
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bind Text <Command-KeyPress> {# nothing}
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}
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# Additional emacs-like bindings:
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bind Text <Control-d> {
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if {!$tk_strictMotif && [%W compare end != insert+1c]} {
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%W delete insert
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}
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}
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bind Text <Control-k> {
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if {!$tk_strictMotif && [%W compare end != insert+1c]} {
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if {[%W compare insert == {insert lineend}]} {
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%W delete insert
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} else {
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%W delete insert {insert lineend}
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}
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}
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||
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}
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bind Text <Control-o> {
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if {!$tk_strictMotif} {
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%W insert insert \n
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%W mark set insert insert-1c
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}
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||
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}
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bind Text <Control-t> {
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if {!$tk_strictMotif} {
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tk::TextTranspose %W
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}
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||
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}
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||
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bind Text <<Undo>> {
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# An Undo operation may remove the separator at the top of the Undo stack.
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# Then the item at the top of the stack gets merged with the subsequent changes.
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||
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# Place separators before and after Undo to prevent this.
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||
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if {[%W cget -autoseparators]} {
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%W edit separator
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||
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}
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||
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catch { %W edit undo }
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||
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if {[%W cget -autoseparators]} {
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%W edit separator
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}
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||
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}
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||
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||
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bind Text <<Redo>> {
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||
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catch { %W edit redo }
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||
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}
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||
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||
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bind Text <Meta-b> {
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||
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if {!$tk_strictMotif} {
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||
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tk::TextSetCursor %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord]
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||
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}
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||
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}
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||
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bind Text <Meta-d> {
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||
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if {!$tk_strictMotif && [%W compare end != insert+1c]} {
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||
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%W delete insert [tk::TextNextWord %W insert]
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||
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}
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||
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}
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||
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bind Text <Meta-f> {
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||
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if {!$tk_strictMotif} {
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||
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tk::TextSetCursor %W [tk::TextNextWord %W insert]
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||
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}
|
||
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}
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||
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bind Text <Meta-less> {
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||
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if {!$tk_strictMotif} {
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||
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tk::TextSetCursor %W 1.0
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||
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}
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||
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}
|
||
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bind Text <Meta-greater> {
|
||
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if {!$tk_strictMotif} {
|
||
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tk::TextSetCursor %W end-1c
|
||
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}
|
||
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}
|
||
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bind Text <Meta-BackSpace> {
|
||
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if {!$tk_strictMotif} {
|
||
|
|
%W delete [tk::TextPrevPos %W insert tcl_startOfPreviousWord] insert
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bind Text <Meta-Delete> {
|
||
|
|
if {!$tk_strictMotif} {
|
||
|
|
%W delete [tk::TextPrevPos %W insert tcl_startOfPreviousWord] insert
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Macintosh only bindings:
|
||
|
|
|
||
|
|
if {[tk windowingsystem] eq "aqua"} {
|
||
|
|
bind Text <Control-v> {
|
||
|
|
tk::TextScrollPages %W 1
|
||
|
|
}
|
||
|
|
|
||
|
|
# End of Mac only bindings
|
||
|
|
}
|
||
|
|
|
||
|
|
# A few additional bindings of my own.
|
||
|
|
|
||
|
|
bind Text <Control-h> {
|
||
|
|
if {!$tk_strictMotif && [%W compare insert != 1.0]} {
|
||
|
|
%W delete insert-1c
|
||
|
|
%W see insert
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bind Text <2> {
|
||
|
|
if {!$tk_strictMotif} {
|
||
|
|
tk::TextScanMark %W %x %y
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bind Text <B2-Motion> {
|
||
|
|
if {!$tk_strictMotif} {
|
||
|
|
tk::TextScanDrag %W %x %y
|
||
|
|
}
|
||
|
|
}
|
||
|
|
set ::tk::Priv(prevPos) {}
|
||
|
|
|
||
|
|
# The MouseWheel will typically only fire on Windows and MacOS X.
|
||
|
|
# However, someone could use the "event generate" command to produce one
|
||
|
|
# on other platforms. We must be careful not to round -ve values of %D
|
||
|
|
# down to zero.
|
||
|
|
|
||
|
|
if {[tk windowingsystem] eq "aqua"} {
|
||
|
|
bind Text <MouseWheel> {
|
||
|
|
%W yview scroll [expr {-15 * (%D)}] pixels
|
||
|
|
}
|
||
|
|
bind Text <Option-MouseWheel> {
|
||
|
|
%W yview scroll [expr {-150 * (%D)}] pixels
|
||
|
|
}
|
||
|
|
bind Text <Shift-MouseWheel> {
|
||
|
|
%W xview scroll [expr {-15 * (%D)}] pixels
|
||
|
|
}
|
||
|
|
bind Text <Shift-Option-MouseWheel> {
|
||
|
|
%W xview scroll [expr {-150 * (%D)}] pixels
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
# We must make sure that positive and negative movements are rounded
|
||
|
|
# equally to integers, avoiding the problem that
|
||
|
|
# (int)1/3 = 0,
|
||
|
|
# but
|
||
|
|
# (int)-1/3 = -1
|
||
|
|
# The following code ensure equal +/- behaviour.
|
||
|
|
bind Text <MouseWheel> {
|
||
|
|
if {%D >= 0} {
|
||
|
|
%W yview scroll [expr {-%D/3}] pixels
|
||
|
|
} else {
|
||
|
|
%W yview scroll [expr {(2-%D)/3}] pixels
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bind Text <Shift-MouseWheel> {
|
||
|
|
if {%D >= 0} {
|
||
|
|
%W xview scroll [expr {-%D/3}] pixels
|
||
|
|
} else {
|
||
|
|
%W xview scroll [expr {(2-%D)/3}] pixels
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if {"x11" eq [tk windowingsystem]} {
|
||
|
|
# Support for mousewheels on Linux/Unix commonly comes through mapping
|
||
|
|
# the wheel to the extended buttons. If you have a mousewheel, find
|
||
|
|
# Linux configuration info at:
|
||
|
|
# http://www.inria.fr/koala/colas/mouse-wheel-scroll/
|
||
|
|
bind Text <4> {
|
||
|
|
if {!$tk_strictMotif} {
|
||
|
|
%W yview scroll -50 pixels
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bind Text <5> {
|
||
|
|
if {!$tk_strictMotif} {
|
||
|
|
%W yview scroll 50 pixels
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bind Text <Shift-4> {
|
||
|
|
if {!$tk_strictMotif} {
|
||
|
|
%W xview scroll -50 pixels
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bind Text <Shift-5> {
|
||
|
|
if {!$tk_strictMotif} {
|
||
|
|
%W xview scroll 50 pixels
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextClosestGap --
|
||
|
|
# Given x and y coordinates, this procedure finds the closest boundary
|
||
|
|
# between characters to the given coordinates and returns the index
|
||
|
|
# of the character just after the boundary.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window.
|
||
|
|
# x - X-coordinate within the window.
|
||
|
|
# y - Y-coordinate within the window.
|
||
|
|
|
||
|
|
proc ::tk::TextClosestGap {w x y} {
|
||
|
|
set pos [$w index @$x,$y]
|
||
|
|
set bbox [$w bbox $pos]
|
||
|
|
if {$bbox eq ""} {
|
||
|
|
return $pos
|
||
|
|
}
|
||
|
|
if {($x - [lindex $bbox 0]) < ([lindex $bbox 2]/2)} {
|
||
|
|
return $pos
|
||
|
|
}
|
||
|
|
$w index "$pos + 1 char"
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextButton1 --
|
||
|
|
# This procedure is invoked to handle button-1 presses in text
|
||
|
|
# widgets. It moves the insertion cursor, sets the selection anchor,
|
||
|
|
# and claims the input focus.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the button was pressed.
|
||
|
|
# x - The x-coordinate of the button press.
|
||
|
|
# y - The x-coordinate of the button press.
|
||
|
|
|
||
|
|
proc ::tk::TextButton1 {w x y} {
|
||
|
|
variable ::tk::Priv
|
||
|
|
|
||
|
|
set Priv(selectMode) char
|
||
|
|
set Priv(mouseMoved) 0
|
||
|
|
set Priv(pressX) $x
|
||
|
|
set anchorname [tk::TextAnchor $w]
|
||
|
|
$w mark set insert [TextClosestGap $w $x $y]
|
||
|
|
$w mark set $anchorname insert
|
||
|
|
# Set the anchor mark's gravity depending on the click position
|
||
|
|
# relative to the gap
|
||
|
|
set bbox [$w bbox [$w index $anchorname]]
|
||
|
|
if {$x > [lindex $bbox 0]} {
|
||
|
|
$w mark gravity $anchorname right
|
||
|
|
} else {
|
||
|
|
$w mark gravity $anchorname left
|
||
|
|
}
|
||
|
|
# Allow focus in any case on Windows, because that will let the
|
||
|
|
# selection be displayed even for state disabled text widgets.
|
||
|
|
if {[tk windowingsystem] eq "win32" \
|
||
|
|
|| [$w cget -state] eq "normal"} {
|
||
|
|
focus $w
|
||
|
|
}
|
||
|
|
if {[$w cget -autoseparators]} {
|
||
|
|
$w edit separator
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextSelectTo --
|
||
|
|
# This procedure is invoked to extend the selection, typically when
|
||
|
|
# dragging it with the mouse. Depending on the selection mode (character,
|
||
|
|
# word, line) it selects in different-sized units. This procedure
|
||
|
|
# ignores mouse motions initially until the mouse has moved from
|
||
|
|
# one character to another or until there have been multiple clicks.
|
||
|
|
#
|
||
|
|
# Note that the 'anchor' is implemented programmatically using
|
||
|
|
# a text widget mark, and uses a name that will be unique for each
|
||
|
|
# text widget (even when there are multiple peers). Currently the
|
||
|
|
# anchor is considered private to Tk, hence the name 'tk::anchor$w'.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the button was pressed.
|
||
|
|
# x - Mouse x position.
|
||
|
|
# y - Mouse y position.
|
||
|
|
|
||
|
|
set ::tk::Priv(textanchoruid) 0
|
||
|
|
|
||
|
|
proc ::tk::TextAnchor {w} {
|
||
|
|
variable Priv
|
||
|
|
if {![info exists Priv(textanchor,$w)]} {
|
||
|
|
set Priv(textanchor,$w) tk::anchor[incr Priv(textanchoruid)]
|
||
|
|
}
|
||
|
|
return $Priv(textanchor,$w)
|
||
|
|
}
|
||
|
|
|
||
|
|
proc ::tk::TextSelectTo {w x y {extend 0}} {
|
||
|
|
variable ::tk::Priv
|
||
|
|
|
||
|
|
set anchorname [tk::TextAnchor $w]
|
||
|
|
set cur [TextClosestGap $w $x $y]
|
||
|
|
if {[catch {$w index $anchorname}]} {
|
||
|
|
$w mark set $anchorname $cur
|
||
|
|
}
|
||
|
|
set anchor [$w index $anchorname]
|
||
|
|
if {[$w compare $cur != $anchor] || (abs($Priv(pressX) - $x) >= 3)} {
|
||
|
|
set Priv(mouseMoved) 1
|
||
|
|
}
|
||
|
|
switch -- $Priv(selectMode) {
|
||
|
|
char {
|
||
|
|
if {[$w compare $cur < $anchorname]} {
|
||
|
|
set first $cur
|
||
|
|
set last $anchorname
|
||
|
|
} else {
|
||
|
|
set first $anchorname
|
||
|
|
set last $cur
|
||
|
|
}
|
||
|
|
}
|
||
|
|
word {
|
||
|
|
# Set initial range based only on the anchor (1 char min width)
|
||
|
|
if {[$w mark gravity $anchorname] eq "right"} {
|
||
|
|
set first $anchorname
|
||
|
|
set last "$anchorname + 1c"
|
||
|
|
} else {
|
||
|
|
set first "$anchorname - 1c"
|
||
|
|
set last $anchorname
|
||
|
|
}
|
||
|
|
# Extend range (if necessary) based on the current point
|
||
|
|
if {[$w compare $cur < $first]} {
|
||
|
|
set first $cur
|
||
|
|
} elseif {[$w compare $cur > $last]} {
|
||
|
|
set last $cur
|
||
|
|
}
|
||
|
|
|
||
|
|
# Now find word boundaries
|
||
|
|
set first [TextPrevPos $w "$first + 1c" tcl_wordBreakBefore]
|
||
|
|
set last [TextNextPos $w "$last - 1c" tcl_wordBreakAfter]
|
||
|
|
}
|
||
|
|
line {
|
||
|
|
# Set initial range based only on the anchor
|
||
|
|
set first "$anchorname linestart"
|
||
|
|
set last "$anchorname lineend"
|
||
|
|
|
||
|
|
# Extend range (if necessary) based on the current point
|
||
|
|
if {[$w compare $cur < $first]} {
|
||
|
|
set first "$cur linestart"
|
||
|
|
} elseif {[$w compare $cur > $last]} {
|
||
|
|
set last "$cur lineend"
|
||
|
|
}
|
||
|
|
set first [$w index $first]
|
||
|
|
set last [$w index "$last + 1c"]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if {$Priv(mouseMoved) || ($Priv(selectMode) ne "char")} {
|
||
|
|
$w tag remove sel 0.0 end
|
||
|
|
$w mark set insert $cur
|
||
|
|
$w tag add sel $first $last
|
||
|
|
$w tag remove sel $last end
|
||
|
|
update idletasks
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextKeyExtend --
|
||
|
|
# This procedure handles extending the selection from the keyboard,
|
||
|
|
# where the point to extend to is really the boundary between two
|
||
|
|
# characters rather than a particular character.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window.
|
||
|
|
# index - The point to which the selection is to be extended.
|
||
|
|
|
||
|
|
proc ::tk::TextKeyExtend {w index} {
|
||
|
|
|
||
|
|
set anchorname [tk::TextAnchor $w]
|
||
|
|
set cur [$w index $index]
|
||
|
|
if {[catch {$w index $anchorname}]} {
|
||
|
|
$w mark set $anchorname $cur
|
||
|
|
}
|
||
|
|
set anchor [$w index $anchorname]
|
||
|
|
if {[$w compare $cur < $anchorname]} {
|
||
|
|
set first $cur
|
||
|
|
set last $anchorname
|
||
|
|
} else {
|
||
|
|
set first $anchorname
|
||
|
|
set last $cur
|
||
|
|
}
|
||
|
|
$w tag remove sel 0.0 $first
|
||
|
|
$w tag add sel $first $last
|
||
|
|
$w tag remove sel $last end
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextPasteSelection --
|
||
|
|
# This procedure sets the insertion cursor to the mouse position,
|
||
|
|
# inserts the selection, and sets the focus to the window.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window.
|
||
|
|
# x, y - Position of the mouse.
|
||
|
|
|
||
|
|
proc ::tk::TextPasteSelection {w x y} {
|
||
|
|
$w mark set insert [TextClosestGap $w $x $y]
|
||
|
|
if {![catch {::tk::GetSelection $w PRIMARY} sel]} {
|
||
|
|
set oldSeparator [$w cget -autoseparators]
|
||
|
|
if {$oldSeparator} {
|
||
|
|
$w configure -autoseparators 0
|
||
|
|
$w edit separator
|
||
|
|
}
|
||
|
|
$w insert insert $sel
|
||
|
|
if {$oldSeparator} {
|
||
|
|
$w edit separator
|
||
|
|
$w configure -autoseparators 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if {[$w cget -state] eq "normal"} {
|
||
|
|
focus $w
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextAutoScan --
|
||
|
|
# This procedure is invoked when the mouse leaves a text window
|
||
|
|
# with button 1 down. It scrolls the window up, down, left, or right,
|
||
|
|
# depending on where the mouse is (this information was saved in
|
||
|
|
# ::tk::Priv(x) and ::tk::Priv(y)), and reschedules itself as an "after"
|
||
|
|
# command so that the window continues to scroll until the mouse
|
||
|
|
# moves back into the window or the mouse button is released.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window.
|
||
|
|
|
||
|
|
proc ::tk::TextAutoScan {w} {
|
||
|
|
variable ::tk::Priv
|
||
|
|
if {![winfo exists $w]} {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if {$Priv(y) >= [winfo height $w]} {
|
||
|
|
$w yview scroll [expr {1 + $Priv(y) - [winfo height $w]}] pixels
|
||
|
|
} elseif {$Priv(y) < 0} {
|
||
|
|
$w yview scroll [expr {-1 + $Priv(y)}] pixels
|
||
|
|
} elseif {$Priv(x) >= [winfo width $w]} {
|
||
|
|
$w xview scroll 2 units
|
||
|
|
} elseif {$Priv(x) < 0} {
|
||
|
|
$w xview scroll -2 units
|
||
|
|
} else {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
TextSelectTo $w $Priv(x) $Priv(y)
|
||
|
|
set Priv(afterId) [after 50 [list tk::TextAutoScan $w]]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextSetCursor
|
||
|
|
# Move the insertion cursor to a given position in a text. Also
|
||
|
|
# clears the selection, if there is one in the text, and makes sure
|
||
|
|
# that the insertion cursor is visible. Also, don't let the insertion
|
||
|
|
# cursor appear on the dummy last line of the text.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window.
|
||
|
|
# pos - The desired new position for the cursor in the window.
|
||
|
|
|
||
|
|
proc ::tk::TextSetCursor {w pos} {
|
||
|
|
if {[$w compare $pos == end]} {
|
||
|
|
set pos {end - 1 chars}
|
||
|
|
}
|
||
|
|
$w mark set insert $pos
|
||
|
|
$w tag remove sel 1.0 end
|
||
|
|
$w see insert
|
||
|
|
if {[$w cget -autoseparators]} {
|
||
|
|
$w edit separator
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextKeySelect
|
||
|
|
# This procedure is invoked when stroking out selections using the
|
||
|
|
# keyboard. It moves the cursor to a new position, then extends
|
||
|
|
# the selection to that position.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window.
|
||
|
|
# new - A new position for the insertion cursor (the cursor hasn't
|
||
|
|
# actually been moved to this position yet).
|
||
|
|
|
||
|
|
proc ::tk::TextKeySelect {w new} {
|
||
|
|
set anchorname [tk::TextAnchor $w]
|
||
|
|
if {[$w tag nextrange sel 1.0 end] eq ""} {
|
||
|
|
if {[$w compare $new < insert]} {
|
||
|
|
$w tag add sel $new insert
|
||
|
|
} else {
|
||
|
|
$w tag add sel insert $new
|
||
|
|
}
|
||
|
|
$w mark set $anchorname insert
|
||
|
|
} else {
|
||
|
|
if {[$w compare $new < $anchorname]} {
|
||
|
|
set first $new
|
||
|
|
set last $anchorname
|
||
|
|
} else {
|
||
|
|
set first $anchorname
|
||
|
|
set last $new
|
||
|
|
}
|
||
|
|
$w tag remove sel 1.0 $first
|
||
|
|
$w tag add sel $first $last
|
||
|
|
$w tag remove sel $last end
|
||
|
|
}
|
||
|
|
$w mark set insert $new
|
||
|
|
$w see insert
|
||
|
|
update idletasks
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextResetAnchor --
|
||
|
|
# Set the selection anchor to whichever end is farthest from the
|
||
|
|
# index argument. One special trick: if the selection has two or
|
||
|
|
# fewer characters, just leave the anchor where it is. In this
|
||
|
|
# case it doesn't matter which point gets chosen for the anchor,
|
||
|
|
# and for the things like Shift-Left and Shift-Right this produces
|
||
|
|
# better behavior when the cursor moves back and forth across the
|
||
|
|
# anchor.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text widget.
|
||
|
|
# index - Position at which mouse button was pressed, which determines
|
||
|
|
# which end of selection should be used as anchor point.
|
||
|
|
|
||
|
|
proc ::tk::TextResetAnchor {w index} {
|
||
|
|
if {[$w tag ranges sel] eq ""} {
|
||
|
|
# Don't move the anchor if there is no selection now; this
|
||
|
|
# makes the widget behave "correctly" when the user clicks
|
||
|
|
# once, then shift-clicks somewhere -- ie, the area between
|
||
|
|
# the two clicks will be selected. [Bug: 5929].
|
||
|
|
return
|
||
|
|
}
|
||
|
|
set anchorname [tk::TextAnchor $w]
|
||
|
|
set a [$w index $index]
|
||
|
|
set b [$w index sel.first]
|
||
|
|
set c [$w index sel.last]
|
||
|
|
if {[$w compare $a < $b]} {
|
||
|
|
$w mark set $anchorname sel.last
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if {[$w compare $a > $c]} {
|
||
|
|
$w mark set $anchorname sel.first
|
||
|
|
return
|
||
|
|
}
|
||
|
|
scan $a "%d.%d" lineA chA
|
||
|
|
scan $b "%d.%d" lineB chB
|
||
|
|
scan $c "%d.%d" lineC chC
|
||
|
|
if {$lineB < $lineC+2} {
|
||
|
|
set total [string length [$w get $b $c]]
|
||
|
|
if {$total <= 2} {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if {[string length [$w get $b $a]] < ($total/2)} {
|
||
|
|
$w mark set $anchorname sel.last
|
||
|
|
} else {
|
||
|
|
$w mark set $anchorname sel.first
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if {($lineA-$lineB) < ($lineC-$lineA)} {
|
||
|
|
$w mark set $anchorname sel.last
|
||
|
|
} else {
|
||
|
|
$w mark set $anchorname sel.first
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextCursorInSelection --
|
||
|
|
# Check whether the selection exists and contains the insertion cursor. Note
|
||
|
|
# that it assumes that the selection is contiguous.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text widget whose selection is to be checked
|
||
|
|
|
||
|
|
proc ::tk::TextCursorInSelection {w} {
|
||
|
|
expr {
|
||
|
|
[llength [$w tag ranges sel]]
|
||
|
|
&& [$w compare sel.first <= insert]
|
||
|
|
&& [$w compare sel.last >= insert]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextInsert --
|
||
|
|
# Insert a string into a text at the point of the insertion cursor.
|
||
|
|
# If there is a selection in the text, and it covers the point of the
|
||
|
|
# insertion cursor, then delete the selection before inserting.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which to insert the string
|
||
|
|
# s - The string to insert (usually just a single character)
|
||
|
|
|
||
|
|
proc ::tk::TextInsert {w s} {
|
||
|
|
if {$s eq "" || [$w cget -state] eq "disabled"} {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
set compound 0
|
||
|
|
if {[TextCursorInSelection $w]} {
|
||
|
|
set oldSeparator [$w cget -autoseparators]
|
||
|
|
if {$oldSeparator} {
|
||
|
|
$w configure -autoseparators 0
|
||
|
|
$w edit separator
|
||
|
|
set compound 1
|
||
|
|
}
|
||
|
|
$w delete sel.first sel.last
|
||
|
|
}
|
||
|
|
$w insert insert $s
|
||
|
|
$w see insert
|
||
|
|
if {$compound && $oldSeparator} {
|
||
|
|
$w edit separator
|
||
|
|
$w configure -autoseparators 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextUpDownLine --
|
||
|
|
# Returns the index of the character one display line above or below the
|
||
|
|
# insertion cursor. There are two tricky things here. First, we want to
|
||
|
|
# maintain the original x position across repeated operations, even though
|
||
|
|
# some lines that will get passed through don't have enough characters to
|
||
|
|
# cover the original column. Second, don't try to scroll past the
|
||
|
|
# beginning or end of the text.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the cursor is to move.
|
||
|
|
# n - The number of display lines to move: -1 for up one line,
|
||
|
|
# +1 for down one line.
|
||
|
|
|
||
|
|
proc ::tk::TextUpDownLine {w n} {
|
||
|
|
variable ::tk::Priv
|
||
|
|
|
||
|
|
set i [$w index insert]
|
||
|
|
if {$Priv(prevPos) ne $i} {
|
||
|
|
set Priv(textPosOrig) $i
|
||
|
|
}
|
||
|
|
set lines [$w count -displaylines $Priv(textPosOrig) $i]
|
||
|
|
set new [$w index \
|
||
|
|
"$Priv(textPosOrig) + [expr {$lines + $n}] displaylines"]
|
||
|
|
if {[$w compare $new == end] \
|
||
|
|
|| [$w compare $new == "insert display linestart"]} {
|
||
|
|
set new $i
|
||
|
|
}
|
||
|
|
set Priv(prevPos) $new
|
||
|
|
return $new
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextPrevPara --
|
||
|
|
# Returns the index of the beginning of the paragraph just before a given
|
||
|
|
# position in the text (the beginning of a paragraph is the first non-blank
|
||
|
|
# character after a blank line).
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the cursor is to move.
|
||
|
|
# pos - Position at which to start search.
|
||
|
|
|
||
|
|
proc ::tk::TextPrevPara {w pos} {
|
||
|
|
set pos [$w index "$pos linestart"]
|
||
|
|
while {1} {
|
||
|
|
if {([$w get "$pos - 1 line"] eq "\n" && ([$w get $pos] ne "\n")) \
|
||
|
|
|| $pos eq "1.0"} {
|
||
|
|
if {[regexp -indices -- {^[ \t]+(.)} \
|
||
|
|
[$w get $pos "$pos lineend"] -> index]} {
|
||
|
|
set pos [$w index "$pos + [lindex $index 0] chars"]
|
||
|
|
}
|
||
|
|
if {[$w compare $pos != insert] || [lindex [split $pos .] 0]==1} {
|
||
|
|
return $pos
|
||
|
|
}
|
||
|
|
}
|
||
|
|
set pos [$w index "$pos - 1 line"]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextNextPara --
|
||
|
|
# Returns the index of the beginning of the paragraph just after a given
|
||
|
|
# position in the text (the beginning of a paragraph is the first non-blank
|
||
|
|
# character after a blank line).
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the cursor is to move.
|
||
|
|
# start - Position at which to start search.
|
||
|
|
|
||
|
|
proc ::tk::TextNextPara {w start} {
|
||
|
|
set pos [$w index "$start linestart + 1 line"]
|
||
|
|
while {[$w get $pos] ne "\n"} {
|
||
|
|
if {[$w compare $pos == end]} {
|
||
|
|
return [$w index "end - 1c"]
|
||
|
|
}
|
||
|
|
set pos [$w index "$pos + 1 line"]
|
||
|
|
}
|
||
|
|
while {[$w get $pos] eq "\n"} {
|
||
|
|
set pos [$w index "$pos + 1 line"]
|
||
|
|
if {[$w compare $pos == end]} {
|
||
|
|
return [$w index "end - 1c"]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if {[regexp -indices -- {^[ \t]+(.)} \
|
||
|
|
[$w get $pos "$pos lineend"] -> index]} {
|
||
|
|
return [$w index "$pos + [lindex $index 0] chars"]
|
||
|
|
}
|
||
|
|
return $pos
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextScrollPages --
|
||
|
|
# This is a utility procedure used in bindings for moving up and down
|
||
|
|
# pages and possibly extending the selection along the way. It scrolls
|
||
|
|
# the view in the widget by the number of pages, and it returns the
|
||
|
|
# index of the character that is at the same position in the new view
|
||
|
|
# as the insertion cursor used to be in the old view.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the cursor is to move.
|
||
|
|
# count - Number of pages forward to scroll; may be negative
|
||
|
|
# to scroll backwards.
|
||
|
|
|
||
|
|
proc ::tk::TextScrollPages {w count} {
|
||
|
|
set bbox [$w bbox insert]
|
||
|
|
$w yview scroll $count pages
|
||
|
|
if {$bbox eq ""} {
|
||
|
|
return [$w index @[expr {[winfo height $w]/2}],0]
|
||
|
|
}
|
||
|
|
return [$w index @[lindex $bbox 0],[lindex $bbox 1]]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextTranspose --
|
||
|
|
# This procedure implements the "transpose" function for text widgets.
|
||
|
|
# It tranposes the characters on either side of the insertion cursor,
|
||
|
|
# unless the cursor is at the end of the line. In this case it
|
||
|
|
# transposes the two characters to the left of the cursor. In either
|
||
|
|
# case, the cursor ends up to the right of the transposed characters.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - Text window in which to transpose.
|
||
|
|
|
||
|
|
proc ::tk::TextTranspose w {
|
||
|
|
set pos insert
|
||
|
|
if {[$w compare $pos != "$pos lineend"]} {
|
||
|
|
set pos [$w index "$pos + 1 char"]
|
||
|
|
}
|
||
|
|
set new [$w get "$pos - 1 char"][$w get "$pos - 2 char"]
|
||
|
|
if {[$w compare "$pos - 1 char" == 1.0]} {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
# ensure this is seen as an atomic op to undo
|
||
|
|
set autosep [$w cget -autoseparators]
|
||
|
|
if {$autosep} {
|
||
|
|
$w configure -autoseparators 0
|
||
|
|
$w edit separator
|
||
|
|
}
|
||
|
|
$w delete "$pos - 2 char" $pos
|
||
|
|
$w insert insert $new
|
||
|
|
$w see insert
|
||
|
|
if {$autosep} {
|
||
|
|
$w edit separator
|
||
|
|
$w configure -autoseparators $autosep
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk_textCopy --
|
||
|
|
# This procedure copies the selection from a text widget into the
|
||
|
|
# clipboard.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - Name of a text widget.
|
||
|
|
|
||
|
|
proc ::tk_textCopy w {
|
||
|
|
if {![catch {set data [$w get sel.first sel.last]}]} {
|
||
|
|
clipboard clear -displayof $w
|
||
|
|
clipboard append -displayof $w $data
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk_textCut --
|
||
|
|
# This procedure copies the selection from a text widget into the
|
||
|
|
# clipboard, then deletes the selection (if it exists in the given
|
||
|
|
# widget).
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - Name of a text widget.
|
||
|
|
|
||
|
|
proc ::tk_textCut w {
|
||
|
|
if {![catch {set data [$w get sel.first sel.last]}]} {
|
||
|
|
# make <<Cut>> an atomic operation on the Undo stack,
|
||
|
|
# i.e. separate it from other delete operations on either side
|
||
|
|
set oldSeparator [$w cget -autoseparators]
|
||
|
|
if {$oldSeparator} {
|
||
|
|
$w edit separator
|
||
|
|
}
|
||
|
|
clipboard clear -displayof $w
|
||
|
|
clipboard append -displayof $w $data
|
||
|
|
$w delete sel.first sel.last
|
||
|
|
if {$oldSeparator} {
|
||
|
|
$w edit separator
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk_textPaste --
|
||
|
|
# This procedure pastes the contents of the clipboard to the insertion
|
||
|
|
# point in a text widget.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - Name of a text widget.
|
||
|
|
|
||
|
|
proc ::tk_textPaste w {
|
||
|
|
if {![catch {::tk::GetSelection $w CLIPBOARD} sel]} {
|
||
|
|
set oldSeparator [$w cget -autoseparators]
|
||
|
|
if {$oldSeparator} {
|
||
|
|
$w configure -autoseparators 0
|
||
|
|
$w edit separator
|
||
|
|
}
|
||
|
|
if {[tk windowingsystem] ne "x11"} {
|
||
|
|
catch { $w delete sel.first sel.last }
|
||
|
|
}
|
||
|
|
$w insert insert $sel
|
||
|
|
if {$oldSeparator} {
|
||
|
|
$w edit separator
|
||
|
|
$w configure -autoseparators 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextNextWord --
|
||
|
|
# Returns the index of the next word position after a given position in the
|
||
|
|
# text. The next word is platform dependent and may be either the next
|
||
|
|
# end-of-word position or the next start-of-word position after the next
|
||
|
|
# end-of-word position.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the cursor is to move.
|
||
|
|
# start - Position at which to start search.
|
||
|
|
|
||
|
|
if {[tk windowingsystem] eq "win32"} {
|
||
|
|
proc ::tk::TextNextWord {w start} {
|
||
|
|
TextNextPos $w [TextNextPos $w $start tcl_endOfWord] \
|
||
|
|
tcl_startOfNextWord
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
proc ::tk::TextNextWord {w start} {
|
||
|
|
TextNextPos $w $start tcl_endOfWord
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextNextPos --
|
||
|
|
# Returns the index of the next position after the given starting
|
||
|
|
# position in the text as computed by a specified function.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the cursor is to move.
|
||
|
|
# start - Position at which to start search.
|
||
|
|
# op - Function to use to find next position.
|
||
|
|
|
||
|
|
proc ::tk::TextNextPos {w start op} {
|
||
|
|
set text ""
|
||
|
|
set cur $start
|
||
|
|
while {[$w compare $cur < end]} {
|
||
|
|
set text $text[$w get -displaychars $cur "$cur lineend + 1c"]
|
||
|
|
set pos [$op $text 0]
|
||
|
|
if {$pos >= 0} {
|
||
|
|
return [$w index "$start + $pos display chars"]
|
||
|
|
}
|
||
|
|
set cur [$w index "$cur lineend +1c"]
|
||
|
|
}
|
||
|
|
return end
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextPrevPos --
|
||
|
|
# Returns the index of the previous position before the given starting
|
||
|
|
# position in the text as computed by a specified function.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window in which the cursor is to move.
|
||
|
|
# start - Position at which to start search.
|
||
|
|
# op - Function to use to find next position.
|
||
|
|
|
||
|
|
proc ::tk::TextPrevPos {w start op} {
|
||
|
|
set text ""
|
||
|
|
set cur $start
|
||
|
|
while {[$w compare $cur > 0.0]} {
|
||
|
|
set text [$w get -displaychars "$cur linestart - 1c" $cur]$text
|
||
|
|
set pos [$op $text end]
|
||
|
|
if {$pos >= 0} {
|
||
|
|
return [$w index "$cur linestart - 1c + $pos display chars"]
|
||
|
|
}
|
||
|
|
set cur [$w index "$cur linestart - 1c"]
|
||
|
|
}
|
||
|
|
return 0.0
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextScanMark --
|
||
|
|
#
|
||
|
|
# Marks the start of a possible scan drag operation
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window from which the text to get
|
||
|
|
# x - x location on screen
|
||
|
|
# y - y location on screen
|
||
|
|
|
||
|
|
proc ::tk::TextScanMark {w x y} {
|
||
|
|
variable ::tk::Priv
|
||
|
|
$w scan mark $x $y
|
||
|
|
set Priv(x) $x
|
||
|
|
set Priv(y) $y
|
||
|
|
set Priv(mouseMoved) 0
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TextScanDrag --
|
||
|
|
#
|
||
|
|
# Marks the start of a possible scan drag operation
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# w - The text window from which the text to get
|
||
|
|
# x - x location on screen
|
||
|
|
# y - y location on screen
|
||
|
|
|
||
|
|
proc ::tk::TextScanDrag {w x y} {
|
||
|
|
variable ::tk::Priv
|
||
|
|
# Make sure these exist, as some weird situations can trigger the
|
||
|
|
# motion binding without the initial press. [Bug #220269]
|
||
|
|
if {![info exists Priv(x)]} {
|
||
|
|
set Priv(x) $x
|
||
|
|
}
|
||
|
|
if {![info exists Priv(y)]} {
|
||
|
|
set Priv(y) $y
|
||
|
|
}
|
||
|
|
if {($x != $Priv(x)) || ($y != $Priv(y))} {
|
||
|
|
set Priv(mouseMoved) 1
|
||
|
|
}
|
||
|
|
if {[info exists Priv(mouseMoved)] && $Priv(mouseMoved)} {
|
||
|
|
$w scan dragto $x $y
|
||
|
|
}
|
||
|
|
}
|