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markom |
# entry.tcl --
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#
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# This file defines the default bindings for Tk entry widgets and provides
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# procedures that help in implementing those bindings.
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#
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# SCCS: @(#) entry.tcl 1.49 97/09/17 19:08:48
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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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#
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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 tkPriv 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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# 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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# pressX - X-coordinate at which the mouse button was pressed.
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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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# The code below creates the default class bindings for entries.
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#-------------------------------------------------------------------------
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bind Entry <<Cut>> {
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if {![catch {set data [string range [%W get] [%W index sel.first]\
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[expr {[%W index sel.last] - 1}]]}]} {
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clipboard clear -displayof %W
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clipboard append -displayof %W $data
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%W delete sel.first sel.last
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}
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}
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bind Entry <<Copy>> {
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if {![catch {set data [string range [%W get] [%W index sel.first]\
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[expr {[%W index sel.last] - 1}]]}]} {
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clipboard clear -displayof %W
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clipboard append -displayof %W $data
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}
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}
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bind Entry <<Paste>> {
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global tcl_platform
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catch {
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if {"$tcl_platform(platform)" != "unix"} {
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catch {
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%W delete sel.first sel.last
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}
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}
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%W insert insert [selection get -displayof %W -selection CLIPBOARD]
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tkEntrySeeInsert %W
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}
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}
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bind Entry <<Clear>> {
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%W delete sel.first sel.last
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}
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bind Entry <<PasteSelection>> {
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if {!$tkPriv(mouseMoved) || $tk_strictMotif} {
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tkEntryPaste %W %x
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}
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}
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# Standard Motif bindings:
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bind Entry <1> {
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tkEntryButton1 %W %x
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%W selection clear
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}
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bind Entry <B1-Motion> {
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set tkPriv(x) %x
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tkEntryMouseSelect %W %x
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}
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bind Entry <Double-1> {
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set tkPriv(selectMode) word
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tkEntryMouseSelect %W %x
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catch {%W icursor sel.first}
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}
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bind Entry <Triple-1> {
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set tkPriv(selectMode) line
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tkEntryMouseSelect %W %x
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%W icursor 0
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}
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bind Entry <Shift-1> {
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set tkPriv(selectMode) char
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%W selection adjust @%x
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}
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bind Entry <Double-Shift-1> {
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set tkPriv(selectMode) word
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tkEntryMouseSelect %W %x
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}
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bind Entry <Triple-Shift-1> {
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set tkPriv(selectMode) line
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tkEntryMouseSelect %W %x
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}
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bind Entry <B1-Leave> {
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set tkPriv(x) %x
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tkEntryAutoScan %W
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}
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bind Entry <B1-Enter> {
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tkCancelRepeat
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}
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bind Entry <ButtonRelease-1> {
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tkCancelRepeat
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}
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bind Entry <Control-1> {
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%W icursor @%x
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}
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bind Entry <Left> {
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tkEntrySetCursor %W [expr {[%W index insert] - 1}]
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}
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bind Entry <Right> {
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tkEntrySetCursor %W [expr {[%W index insert] + 1}]
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}
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bind Entry <Shift-Left> {
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tkEntryKeySelect %W [expr {[%W index insert] - 1}]
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tkEntrySeeInsert %W
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}
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bind Entry <Shift-Right> {
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tkEntryKeySelect %W [expr {[%W index insert] + 1}]
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tkEntrySeeInsert %W
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}
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bind Entry <Control-Left> {
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tkEntrySetCursor %W [tkEntryPreviousWord %W insert]
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}
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bind Entry <Control-Right> {
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tkEntrySetCursor %W [tkEntryNextWord %W insert]
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}
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bind Entry <Shift-Control-Left> {
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tkEntryKeySelect %W [tkEntryPreviousWord %W insert]
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tkEntrySeeInsert %W
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}
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bind Entry <Shift-Control-Right> {
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tkEntryKeySelect %W [tkEntryNextWord %W insert]
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tkEntrySeeInsert %W
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}
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bind Entry <Home> {
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tkEntrySetCursor %W 0
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}
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bind Entry <Shift-Home> {
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tkEntryKeySelect %W 0
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tkEntrySeeInsert %W
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}
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bind Entry <End> {
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tkEntrySetCursor %W end
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}
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bind Entry <Shift-End> {
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tkEntryKeySelect %W end
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tkEntrySeeInsert %W
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}
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bind Entry <Delete> {
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if {[%W selection present]} {
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%W delete sel.first sel.last
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} else {
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%W delete insert
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}
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}
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bind Entry <BackSpace> {
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tkEntryBackspace %W
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}
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bind Entry <Control-space> {
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%W selection from insert
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}
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bind Entry <Select> {
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%W selection from insert
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}
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bind Entry <Control-Shift-space> {
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%W selection adjust insert
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}
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bind Entry <Shift-Select> {
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%W selection adjust insert
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}
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bind Entry <Control-slash> {
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%W selection range 0 end
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}
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bind Entry <Control-backslash> {
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%W selection clear
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}
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bind Entry <KeyPress> {
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tkEntryInsert %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, Return, and Tab.
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bind Entry <Alt-KeyPress> {# nothing}
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bind Entry <Meta-KeyPress> {# nothing}
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bind Entry <Control-KeyPress> {# nothing}
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bind Entry <Escape> {# nothing}
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bind Entry <Return> {# nothing}
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bind Entry <KP_Enter> {# nothing}
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bind Entry <Tab> {# nothing}
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if {$tcl_platform(platform) == "macintosh"} {
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bind Entry <Command-KeyPress> {# nothing}
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}
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# On Windows, paste is done using Shift-Insert. Shift-Insert already
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# generates the <<Paste>> event, so we don't need to do anything here.
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if {$tcl_platform(platform) != "windows"} {
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bind Entry <Insert> {
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catch {tkEntryInsert %W [selection get -displayof %W]}
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}
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}
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# Additional emacs-like bindings:
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bind Entry <Control-a> {
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if {!$tk_strictMotif} {
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tkEntrySetCursor %W 0
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}
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}
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bind Entry <Control-b> {
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if {!$tk_strictMotif} {
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tkEntrySetCursor %W [expr {[%W index insert] - 1}]
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}
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}
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bind Entry <Control-d> {
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if {!$tk_strictMotif} {
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%W delete insert
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}
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}
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bind Entry <Control-e> {
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if {!$tk_strictMotif} {
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tkEntrySetCursor %W end
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}
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}
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bind Entry <Control-f> {
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if {!$tk_strictMotif} {
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tkEntrySetCursor %W [expr {[%W index insert] + 1}]
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}
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}
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bind Entry <Control-h> {
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if {!$tk_strictMotif} {
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tkEntryBackspace %W
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}
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}
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bind Entry <Control-k> {
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if {!$tk_strictMotif} {
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%W delete insert end
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}
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}
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bind Entry <Control-t> {
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if {!$tk_strictMotif} {
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tkEntryTranspose %W
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}
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}
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bind Entry <Meta-b> {
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if {!$tk_strictMotif} {
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tkEntrySetCursor %W [tkEntryPreviousWord %W insert]
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}
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}
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bind Entry <Meta-d> {
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if {!$tk_strictMotif} {
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%W delete insert [tkEntryNextWord %W insert]
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}
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}
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bind Entry <Meta-f> {
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if {!$tk_strictMotif} {
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tkEntrySetCursor %W [tkEntryNextWord %W insert]
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}
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}
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bind Entry <Meta-BackSpace> {
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if {!$tk_strictMotif} {
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%W delete [tkEntryPreviousWord %W insert] insert
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}
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}
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bind Entry <Meta-Delete> {
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if {!$tk_strictMotif} {
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%W delete [tkEntryPreviousWord %W insert] insert
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}
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}
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# A few additional bindings of my own.
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bind Entry <2> {
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if {!$tk_strictMotif} {
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%W scan mark %x
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set tkPriv(x) %x
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set tkPriv(y) %y
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set tkPriv(mouseMoved) 0
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}
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}
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bind Entry <B2-Motion> {
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if {!$tk_strictMotif} {
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if {abs(%x-$tkPriv(x)) > 2} {
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set tkPriv(mouseMoved) 1
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}
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| 299 |
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%W scan dragto %x
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}
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| 301 |
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}
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# tkEntryClosestGap --
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# Given x and y coordinates, this procedure finds the closest boundary
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# between characters to the given coordinates and returns the index
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# of the character just after the boundary.
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#
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# Arguments:
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# w - The entry window.
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# x - X-coordinate within the window.
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proc tkEntryClosestGap {w x} {
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set pos [$w index @$x]
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set bbox [$w bbox $pos]
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if {($x - [lindex $bbox 0]) < ([lindex $bbox 2]/2)} {
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return $pos
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| 317 |
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}
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| 318 |
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incr pos
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| 319 |
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}
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| 320 |
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| 321 |
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# tkEntryButton1 --
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| 322 |
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# This procedure is invoked to handle button-1 presses in entry
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# widgets. It moves the insertion cursor, sets the selection anchor,
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| 324 |
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# and claims the input focus.
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#
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| 326 |
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# Arguments:
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| 327 |
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# w - The entry window in which the button was pressed.
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| 328 |
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# x - The x-coordinate of the button press.
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| 329 |
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proc tkEntryButton1 {w x} {
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global tkPriv
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| 332 |
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set tkPriv(selectMode) char
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| 334 |
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set tkPriv(mouseMoved) 0
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set tkPriv(pressX) $x
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$w icursor [tkEntryClosestGap $w $x]
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$w selection from insert
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| 338 |
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if {[lindex [$w configure -state] 4] == "normal"} {focus $w}
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| 339 |
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}
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| 340 |
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| 341 |
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# tkEntryMouseSelect --
|
| 342 |
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# This procedure is invoked when dragging out a selection with
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| 343 |
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# the mouse. Depending on the selection mode (character, word,
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| 344 |
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# line) it selects in different-sized units. This procedure
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| 345 |
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# ignores mouse motions initially until the mouse has moved from
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| 346 |
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# one character to another or until there have been multiple clicks.
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| 347 |
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#
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| 348 |
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# Arguments:
|
| 349 |
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# w - The entry window in which the button was pressed.
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| 350 |
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# x - The x-coordinate of the mouse.
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| 351 |
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| 352 |
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proc tkEntryMouseSelect {w x} {
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| 353 |
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global tkPriv
|
| 354 |
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| 355 |
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set cur [tkEntryClosestGap $w $x]
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| 356 |
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set anchor [$w index anchor]
|
| 357 |
|
|
if {($cur != $anchor) || (abs($tkPriv(pressX) - $x) >= 3)} {
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| 358 |
|
|
set tkPriv(mouseMoved) 1
|
| 359 |
|
|
}
|
| 360 |
|
|
switch $tkPriv(selectMode) {
|
| 361 |
|
|
char {
|
| 362 |
|
|
if {$tkPriv(mouseMoved)} {
|
| 363 |
|
|
if {$cur < $anchor} {
|
| 364 |
|
|
$w selection range $cur $anchor
|
| 365 |
|
|
} elseif {$cur > $anchor} {
|
| 366 |
|
|
$w selection range $anchor $cur
|
| 367 |
|
|
} else {
|
| 368 |
|
|
$w selection clear
|
| 369 |
|
|
}
|
| 370 |
|
|
}
|
| 371 |
|
|
}
|
| 372 |
|
|
word {
|
| 373 |
|
|
if {$cur < [$w index anchor]} {
|
| 374 |
|
|
set before [tcl_wordBreakBefore [$w get] $cur]
|
| 375 |
|
|
set after [tcl_wordBreakAfter [$w get] [expr {$anchor-1}]]
|
| 376 |
|
|
} else {
|
| 377 |
|
|
set before [tcl_wordBreakBefore [$w get] $anchor]
|
| 378 |
|
|
set after [tcl_wordBreakAfter [$w get] [expr {$cur - 1}]]
|
| 379 |
|
|
}
|
| 380 |
|
|
if {$before < 0} {
|
| 381 |
|
|
set before 0
|
| 382 |
|
|
}
|
| 383 |
|
|
if {$after < 0} {
|
| 384 |
|
|
set after end
|
| 385 |
|
|
}
|
| 386 |
|
|
$w selection range $before $after
|
| 387 |
|
|
}
|
| 388 |
|
|
line {
|
| 389 |
|
|
$w selection range 0 end
|
| 390 |
|
|
}
|
| 391 |
|
|
}
|
| 392 |
|
|
update idletasks
|
| 393 |
|
|
}
|
| 394 |
|
|
|
| 395 |
|
|
# tkEntryPaste --
|
| 396 |
|
|
# This procedure sets the insertion cursor to the current mouse position,
|
| 397 |
|
|
# pastes the selection there, and sets the focus to the window.
|
| 398 |
|
|
#
|
| 399 |
|
|
# Arguments:
|
| 400 |
|
|
# w - The entry window.
|
| 401 |
|
|
# x - X position of the mouse.
|
| 402 |
|
|
|
| 403 |
|
|
proc tkEntryPaste {w x} {
|
| 404 |
|
|
global tkPriv
|
| 405 |
|
|
|
| 406 |
|
|
$w icursor [tkEntryClosestGap $w $x]
|
| 407 |
|
|
catch {$w insert insert [selection get -displayof $w]}
|
| 408 |
|
|
if {[lindex [$w configure -state] 4] == "normal"} {focus $w}
|
| 409 |
|
|
}
|
| 410 |
|
|
|
| 411 |
|
|
# tkEntryAutoScan --
|
| 412 |
|
|
# This procedure is invoked when the mouse leaves an entry window
|
| 413 |
|
|
# with button 1 down. It scrolls the window left or right,
|
| 414 |
|
|
# depending on where the mouse is, and reschedules itself as an
|
| 415 |
|
|
# "after" command so that the window continues to scroll until the
|
| 416 |
|
|
# mouse moves back into the window or the mouse button is released.
|
| 417 |
|
|
#
|
| 418 |
|
|
# Arguments:
|
| 419 |
|
|
# w - The entry window.
|
| 420 |
|
|
|
| 421 |
|
|
proc tkEntryAutoScan {w} {
|
| 422 |
|
|
global tkPriv
|
| 423 |
|
|
set x $tkPriv(x)
|
| 424 |
|
|
if {![winfo exists $w]} return
|
| 425 |
|
|
if {$x >= [winfo width $w]} {
|
| 426 |
|
|
$w xview scroll 2 units
|
| 427 |
|
|
tkEntryMouseSelect $w $x
|
| 428 |
|
|
} elseif {$x < 0} {
|
| 429 |
|
|
$w xview scroll -2 units
|
| 430 |
|
|
tkEntryMouseSelect $w $x
|
| 431 |
|
|
}
|
| 432 |
|
|
set tkPriv(afterId) [after 50 tkEntryAutoScan $w]
|
| 433 |
|
|
}
|
| 434 |
|
|
|
| 435 |
|
|
# tkEntryKeySelect --
|
| 436 |
|
|
# This procedure is invoked when stroking out selections using the
|
| 437 |
|
|
# keyboard. It moves the cursor to a new position, then extends
|
| 438 |
|
|
# the selection to that position.
|
| 439 |
|
|
#
|
| 440 |
|
|
# Arguments:
|
| 441 |
|
|
# w - The entry window.
|
| 442 |
|
|
# new - A new position for the insertion cursor (the cursor hasn't
|
| 443 |
|
|
# actually been moved to this position yet).
|
| 444 |
|
|
|
| 445 |
|
|
proc tkEntryKeySelect {w new} {
|
| 446 |
|
|
if {![$w selection present]} {
|
| 447 |
|
|
$w selection from insert
|
| 448 |
|
|
$w selection to $new
|
| 449 |
|
|
} else {
|
| 450 |
|
|
$w selection adjust $new
|
| 451 |
|
|
}
|
| 452 |
|
|
$w icursor $new
|
| 453 |
|
|
}
|
| 454 |
|
|
|
| 455 |
|
|
# tkEntryInsert --
|
| 456 |
|
|
# Insert a string into an entry at the point of the insertion cursor.
|
| 457 |
|
|
# If there is a selection in the entry, and it covers the point of the
|
| 458 |
|
|
# insertion cursor, then delete the selection before inserting.
|
| 459 |
|
|
#
|
| 460 |
|
|
# Arguments:
|
| 461 |
|
|
# w - The entry window in which to insert the string
|
| 462 |
|
|
# s - The string to insert (usually just a single character)
|
| 463 |
|
|
|
| 464 |
|
|
proc tkEntryInsert {w s} {
|
| 465 |
|
|
if {$s == ""} {
|
| 466 |
|
|
return
|
| 467 |
|
|
}
|
| 468 |
|
|
catch {
|
| 469 |
|
|
set insert [$w index insert]
|
| 470 |
|
|
if {([$w index sel.first] <= $insert)
|
| 471 |
|
|
&& ([$w index sel.last] >= $insert)} {
|
| 472 |
|
|
$w delete sel.first sel.last
|
| 473 |
|
|
}
|
| 474 |
|
|
}
|
| 475 |
|
|
$w insert insert $s
|
| 476 |
|
|
tkEntrySeeInsert $w
|
| 477 |
|
|
}
|
| 478 |
|
|
|
| 479 |
|
|
# tkEntryBackspace --
|
| 480 |
|
|
# Backspace over the character just before the insertion cursor.
|
| 481 |
|
|
# If backspacing would move the cursor off the left edge of the
|
| 482 |
|
|
# window, reposition the cursor at about the middle of the window.
|
| 483 |
|
|
#
|
| 484 |
|
|
# Arguments:
|
| 485 |
|
|
# w - The entry window in which to backspace.
|
| 486 |
|
|
|
| 487 |
|
|
proc tkEntryBackspace w {
|
| 488 |
|
|
if {[$w selection present]} {
|
| 489 |
|
|
$w delete sel.first sel.last
|
| 490 |
|
|
} else {
|
| 491 |
|
|
set x [expr {[$w index insert] - 1}]
|
| 492 |
|
|
if {$x >= 0} {$w delete $x}
|
| 493 |
|
|
if {[$w index @0] >= [$w index insert]} {
|
| 494 |
|
|
set range [$w xview]
|
| 495 |
|
|
set left [lindex $range 0]
|
| 496 |
|
|
set right [lindex $range 1]
|
| 497 |
|
|
$w xview moveto [expr {$left - ($right - $left)/2.0}]
|
| 498 |
|
|
}
|
| 499 |
|
|
}
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
# tkEntrySeeInsert --
|
| 503 |
|
|
# Make sure that the insertion cursor is visible in the entry window.
|
| 504 |
|
|
# If not, adjust the view so that it is.
|
| 505 |
|
|
#
|
| 506 |
|
|
# Arguments:
|
| 507 |
|
|
# w - The entry window.
|
| 508 |
|
|
|
| 509 |
|
|
proc tkEntrySeeInsert w {
|
| 510 |
|
|
set c [$w index insert]
|
| 511 |
|
|
set left [$w index @0]
|
| 512 |
|
|
if {$left > $c} {
|
| 513 |
|
|
$w xview $c
|
| 514 |
|
|
return
|
| 515 |
|
|
}
|
| 516 |
|
|
set x [winfo width $w]
|
| 517 |
|
|
while {([$w index @$x] <= $c) && ($left < $c)} {
|
| 518 |
|
|
incr left
|
| 519 |
|
|
$w xview $left
|
| 520 |
|
|
}
|
| 521 |
|
|
}
|
| 522 |
|
|
|
| 523 |
|
|
# tkEntrySetCursor -
|
| 524 |
|
|
# Move the insertion cursor to a given position in an entry. Also
|
| 525 |
|
|
# clears the selection, if there is one in the entry, and makes sure
|
| 526 |
|
|
# that the insertion cursor is visible.
|
| 527 |
|
|
#
|
| 528 |
|
|
# Arguments:
|
| 529 |
|
|
# w - The entry window.
|
| 530 |
|
|
# pos - The desired new position for the cursor in the window.
|
| 531 |
|
|
|
| 532 |
|
|
proc tkEntrySetCursor {w pos} {
|
| 533 |
|
|
$w icursor $pos
|
| 534 |
|
|
$w selection clear
|
| 535 |
|
|
tkEntrySeeInsert $w
|
| 536 |
|
|
}
|
| 537 |
|
|
|
| 538 |
|
|
# tkEntryTranspose -
|
| 539 |
|
|
# This procedure implements the "transpose" function for entry widgets.
|
| 540 |
|
|
# It tranposes the characters on either side of the insertion cursor,
|
| 541 |
|
|
# unless the cursor is at the end of the line. In this case it
|
| 542 |
|
|
# transposes the two characters to the left of the cursor. In either
|
| 543 |
|
|
# case, the cursor ends up to the right of the transposed characters.
|
| 544 |
|
|
#
|
| 545 |
|
|
# Arguments:
|
| 546 |
|
|
# w - The entry window.
|
| 547 |
|
|
|
| 548 |
|
|
proc tkEntryTranspose w {
|
| 549 |
|
|
set i [$w index insert]
|
| 550 |
|
|
if {$i < [$w index end]} {
|
| 551 |
|
|
incr i
|
| 552 |
|
|
}
|
| 553 |
|
|
set first [expr {$i-2}]
|
| 554 |
|
|
if {$first < 0} {
|
| 555 |
|
|
return
|
| 556 |
|
|
}
|
| 557 |
|
|
set new [string index [$w get] [expr {$i-1}]][string index [$w get] $first]
|
| 558 |
|
|
$w delete $first $i
|
| 559 |
|
|
$w insert insert $new
|
| 560 |
|
|
tkEntrySeeInsert $w
|
| 561 |
|
|
}
|
| 562 |
|
|
|
| 563 |
|
|
# tkEntryNextWord --
|
| 564 |
|
|
# Returns the index of the next word position after a given position in the
|
| 565 |
|
|
# entry. The next word is platform dependent and may be either the next
|
| 566 |
|
|
# end-of-word position or the next start-of-word position after the next
|
| 567 |
|
|
# end-of-word position.
|
| 568 |
|
|
#
|
| 569 |
|
|
# Arguments:
|
| 570 |
|
|
# w - The entry window in which the cursor is to move.
|
| 571 |
|
|
# start - Position at which to start search.
|
| 572 |
|
|
|
| 573 |
|
|
if {$tcl_platform(platform) == "windows"} {
|
| 574 |
|
|
proc tkEntryNextWord {w start} {
|
| 575 |
|
|
set pos [tcl_endOfWord [$w get] [$w index $start]]
|
| 576 |
|
|
if {$pos >= 0} {
|
| 577 |
|
|
set pos [tcl_startOfNextWord [$w get] $pos]
|
| 578 |
|
|
}
|
| 579 |
|
|
if {$pos < 0} {
|
| 580 |
|
|
return end
|
| 581 |
|
|
}
|
| 582 |
|
|
return $pos
|
| 583 |
|
|
}
|
| 584 |
|
|
} else {
|
| 585 |
|
|
proc tkEntryNextWord {w start} {
|
| 586 |
|
|
set pos [tcl_endOfWord [$w get] [$w index $start]]
|
| 587 |
|
|
if {$pos < 0} {
|
| 588 |
|
|
return end
|
| 589 |
|
|
}
|
| 590 |
|
|
return $pos
|
| 591 |
|
|
}
|
| 592 |
|
|
}
|
| 593 |
|
|
|
| 594 |
|
|
# tkEntryPreviousWord --
|
| 595 |
|
|
#
|
| 596 |
|
|
# Returns the index of the previous word position before a given
|
| 597 |
|
|
# position in the entry.
|
| 598 |
|
|
#
|
| 599 |
|
|
# Arguments:
|
| 600 |
|
|
# w - The entry window in which the cursor is to move.
|
| 601 |
|
|
# start - Position at which to start search.
|
| 602 |
|
|
|
| 603 |
|
|
proc tkEntryPreviousWord {w start} {
|
| 604 |
|
|
set pos [tcl_startOfPreviousWord [$w get] [$w index $start]]
|
| 605 |
|
|
if {$pos < 0} {
|
| 606 |
|
|
return 0
|
| 607 |
|
|
}
|
| 608 |
|
|
return $pos
|
| 609 |
|
|
}
|
| 610 |
|
|
|
