612 lines
16 KiB
Tcl
612 lines
16 KiB
Tcl
#
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# DERIVED FROM: tk/library/entry.tcl r1.22
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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) 2004, Joe English
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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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namespace eval ttk {
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namespace eval entry {
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variable State
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set State(x) 0
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set State(selectMode) none
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set State(anchor) 0
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set State(scanX) 0
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set State(scanIndex) 0
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set State(scanMoved) 0
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# Button-2 scan speed is (scanNum/scanDen) characters
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# per pixel of mouse movement.
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# The standard Tk entry widget uses the equivalent of
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# scanNum = 10, scanDen = average character width.
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# I don't know why that was chosen.
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#
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set State(scanNum) 1
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set State(scanDen) 1
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set State(deadband) 3 ;# #pixels for mouse-moved deadband.
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}
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}
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### Option database settings.
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#
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option add *TEntry.cursor [ttk::cursor text]
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### Bindings.
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#
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# Removed the following standard Tk bindings:
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#
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# <Control-Key-space>, <Control-Shift-Key-space>,
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# <Key-Select>, <Shift-Key-Select>:
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# ttk::entry widget doesn't use selection anchor.
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# <Key-Insert>:
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# Inserts PRIMARY selection (on non-Windows platforms).
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# This is inconsistent with typical platform bindings.
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# <Double-Shift-ButtonPress-1>, <Triple-Shift-ButtonPress-1>:
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# These don't do the right thing to start with.
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# <Meta-Key-b>, <Meta-Key-d>, <Meta-Key-f>,
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# <Meta-Key-BackSpace>, <Meta-Key-Delete>:
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# Judgment call. If <Meta> happens to be assigned to the Alt key,
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# these could conflict with application accelerators.
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# (Plus, who has a Meta key these days?)
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# <Control-Key-t>:
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# Another judgment call. If anyone misses this, let me know
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# and I'll put it back.
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#
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## Clipboard events:
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#
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bind TEntry <<Cut>> { ttk::entry::Cut %W }
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bind TEntry <<Copy>> { ttk::entry::Copy %W }
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bind TEntry <<Paste>> { ttk::entry::Paste %W }
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bind TEntry <<Clear>> { ttk::entry::Clear %W }
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## Button1 bindings:
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# Used for selection and navigation.
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#
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bind TEntry <ButtonPress-1> { ttk::entry::Press %W %x }
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bind TEntry <Shift-ButtonPress-1> { ttk::entry::Shift-Press %W %x }
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bind TEntry <Double-ButtonPress-1> { ttk::entry::Select %W %x word }
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bind TEntry <Triple-ButtonPress-1> { ttk::entry::Select %W %x line }
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bind TEntry <B1-Motion> { ttk::entry::Drag %W %x }
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bind TEntry <B1-Leave> { ttk::entry::DragOut %W %m }
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bind TEntry <B1-Enter> { ttk::entry::DragIn %W }
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bind TEntry <ButtonRelease-1> { ttk::entry::Release %W }
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bind TEntry <Control-ButtonPress-1> {
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%W instate {!readonly !disabled} { %W icursor @%x ; focus %W }
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}
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## Button2 bindings:
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# Used for scanning and primary transfer.
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# Note: ButtonRelease-2 is mapped to <<PasteSelection>> in tk.tcl.
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#
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bind TEntry <ButtonPress-2> { ttk::entry::ScanMark %W %x }
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bind TEntry <B2-Motion> { ttk::entry::ScanDrag %W %x }
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bind TEntry <ButtonRelease-2> { ttk::entry::ScanRelease %W %x }
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bind TEntry <<PasteSelection>> { ttk::entry::ScanRelease %W %x }
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## Keyboard navigation bindings:
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#
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bind TEntry <Key-Left> { ttk::entry::Move %W prevchar }
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bind TEntry <Key-Right> { ttk::entry::Move %W nextchar }
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bind TEntry <Control-Key-Left> { ttk::entry::Move %W prevword }
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bind TEntry <Control-Key-Right> { ttk::entry::Move %W nextword }
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bind TEntry <Key-Home> { ttk::entry::Move %W home }
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bind TEntry <Key-End> { ttk::entry::Move %W end }
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bind TEntry <Shift-Key-Left> { ttk::entry::Extend %W prevchar }
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bind TEntry <Shift-Key-Right> { ttk::entry::Extend %W nextchar }
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bind TEntry <Shift-Control-Key-Left> { ttk::entry::Extend %W prevword }
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bind TEntry <Shift-Control-Key-Right> { ttk::entry::Extend %W nextword }
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bind TEntry <Shift-Key-Home> { ttk::entry::Extend %W home }
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bind TEntry <Shift-Key-End> { ttk::entry::Extend %W end }
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bind TEntry <Control-Key-slash> { %W selection range 0 end }
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bind TEntry <Control-Key-backslash> { %W selection clear }
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bind TEntry <<TraverseIn>> { %W selection range 0 end; %W icursor end }
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## Edit bindings:
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#
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bind TEntry <KeyPress> { ttk::entry::Insert %W %A }
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bind TEntry <Key-Delete> { ttk::entry::Delete %W }
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bind TEntry <Key-BackSpace> { ttk::entry::Backspace %W }
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# Ignore all Alt, Meta, and Control keypresses unless explicitly bound.
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# Otherwise, the <KeyPress> class binding will fire and insert the character.
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# Ditto for Escape, Return, and Tab.
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#
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bind TEntry <Alt-KeyPress> {# nothing}
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bind TEntry <Meta-KeyPress> {# nothing}
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bind TEntry <Control-KeyPress> {# nothing}
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bind TEntry <Key-Escape> {# nothing}
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bind TEntry <Key-Return> {# nothing}
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bind TEntry <Key-KP_Enter> {# nothing}
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bind TEntry <Key-Tab> {# nothing}
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# Argh. Apparently on Windows, the NumLock modifier is interpreted
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# as a Command modifier.
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if {[tk windowingsystem] eq "aqua"} {
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bind TEntry <Command-KeyPress> {# nothing}
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}
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# Tk-on-Cocoa generates characters for these two keys. [Bug 2971663]
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bind TEntry <Down> {# nothing}
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bind TEntry <Up> {# nothing}
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## Additional emacs-like bindings:
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#
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bind TEntry <Control-Key-a> { ttk::entry::Move %W home }
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bind TEntry <Control-Key-b> { ttk::entry::Move %W prevchar }
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bind TEntry <Control-Key-d> { ttk::entry::Delete %W }
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bind TEntry <Control-Key-e> { ttk::entry::Move %W end }
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bind TEntry <Control-Key-f> { ttk::entry::Move %W nextchar }
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bind TEntry <Control-Key-h> { ttk::entry::Backspace %W }
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bind TEntry <Control-Key-k> { %W delete insert end }
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### Clipboard procedures.
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#
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## EntrySelection -- Return the selected text of the entry.
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# Raises an error if there is no selection.
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#
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proc ttk::entry::EntrySelection {w} {
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set entryString [string range [$w get] [$w index sel.first] \
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[expr {[$w index sel.last] - 1}]]
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if {[$w cget -show] ne ""} {
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return [string repeat [string index [$w cget -show] 0] \
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[string length $entryString]]
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}
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return $entryString
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}
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## Paste -- Insert clipboard contents at current insert point.
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#
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proc ttk::entry::Paste {w} {
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catch {
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set clipboard [::tk::GetSelection $w CLIPBOARD]
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PendingDelete $w
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$w insert insert $clipboard
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See $w insert
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}
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}
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## Copy -- Copy selection to clipboard.
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#
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proc ttk::entry::Copy {w} {
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if {![catch {EntrySelection $w} selection]} {
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clipboard clear -displayof $w
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clipboard append -displayof $w $selection
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}
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}
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## Clear -- Delete the selection.
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#
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proc ttk::entry::Clear {w} {
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catch { $w delete sel.first sel.last }
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}
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## Cut -- Copy selection to clipboard then delete it.
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#
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proc ttk::entry::Cut {w} {
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Copy $w; Clear $w
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}
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### Navigation procedures.
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#
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## ClosestGap -- Find closest boundary between characters.
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# Returns the index of the character just after the boundary.
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#
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proc ttk::entry::ClosestGap {w x} {
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set pos [$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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incr pos
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}
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return $pos
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}
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## See $index -- Make sure that the character at $index is visible.
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#
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proc ttk::entry::See {w {index insert}} {
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update idletasks ;# ensure scroll data up-to-date
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set c [$w index $index]
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# @@@ OR: check [$w index left] / [$w index right]
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if {$c < [$w index @0] || $c >= [$w index @[winfo width $w]]} {
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$w xview $c
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}
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}
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## NextWord -- Find the next word position.
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# Note: The "next word position" follows platform conventions:
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# either the next end-of-word position, or the start-of-word
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# position following the next end-of-word position.
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#
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set ::ttk::entry::State(startNext) \
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[string equal [tk windowingsystem] "win32"]
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proc ttk::entry::NextWord {w start} {
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variable State
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set pos [tcl_endOfWord [$w get] [$w index $start]]
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if {$pos >= 0 && $State(startNext)} {
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set pos [tcl_startOfNextWord [$w get] $pos]
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}
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if {$pos < 0} {
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return end
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}
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return $pos
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}
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## PrevWord -- Find the previous word position.
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#
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proc ttk::entry::PrevWord {w start} {
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set pos [tcl_startOfPreviousWord [$w get] [$w index $start]]
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if {$pos < 0} {
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return 0
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}
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return $pos
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}
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## RelIndex -- Compute character/word/line-relative index.
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#
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proc ttk::entry::RelIndex {w where {index insert}} {
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switch -- $where {
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prevchar { expr {[$w index $index] - 1} }
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nextchar { expr {[$w index $index] + 1} }
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prevword { PrevWord $w $index }
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nextword { NextWord $w $index }
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home { return 0 }
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end { $w index end }
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default { error "Bad relative index $index" }
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}
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}
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## Move -- Move insert cursor to relative location.
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# Also clears the selection, if any, and makes sure
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# that the insert cursor is visible.
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#
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proc ttk::entry::Move {w where} {
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$w icursor [RelIndex $w $where]
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$w selection clear
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See $w insert
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}
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### Selection procedures.
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#
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## ExtendTo -- Extend the selection to the specified index.
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#
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# The other end of the selection (the anchor) is determined as follows:
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#
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# (1) if there is no selection, the anchor is the insert cursor;
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# (2) if the index is outside the selection, grow the selection;
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# (3) if the insert cursor is at one end of the selection, anchor the other end
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# (4) otherwise anchor the start of the selection
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#
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# The insert cursor is placed at the new end of the selection.
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#
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# Returns: selection anchor.
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#
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proc ttk::entry::ExtendTo {w index} {
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set index [$w index $index]
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set insert [$w index insert]
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# Figure out selection anchor:
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if {![$w selection present]} {
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set anchor $insert
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} else {
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set selfirst [$w index sel.first]
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set sellast [$w index sel.last]
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if { ($index < $selfirst)
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|| ($insert == $selfirst && $index <= $sellast)
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} {
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set anchor $sellast
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} else {
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set anchor $selfirst
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}
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}
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# Extend selection:
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if {$anchor < $index} {
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$w selection range $anchor $index
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} else {
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$w selection range $index $anchor
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}
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$w icursor $index
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return $anchor
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}
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## Extend -- Extend the selection to a relative position, show insert cursor
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#
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proc ttk::entry::Extend {w where} {
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ExtendTo $w [RelIndex $w $where]
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See $w
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}
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### Button 1 binding procedures.
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#
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# Double-clicking followed by a drag enters "word-select" mode.
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# Triple-clicking enters "line-select" mode.
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#
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## Press -- ButtonPress-1 binding.
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# Set the insertion cursor, claim the input focus, set up for
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# future drag operations.
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#
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proc ttk::entry::Press {w x} {
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variable State
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$w icursor [ClosestGap $w $x]
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$w selection clear
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$w instate !disabled { focus $w }
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# Set up for future drag, double-click, or triple-click.
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set State(x) $x
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set State(selectMode) char
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set State(anchor) [$w index insert]
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}
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## Shift-Press -- Shift-ButtonPress-1 binding.
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# Extends the selection, sets anchor for future drag operations.
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#
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proc ttk::entry::Shift-Press {w x} {
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variable State
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focus $w
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set anchor [ExtendTo $w @$x]
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set State(x) $x
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set State(selectMode) char
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set State(anchor) $anchor
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}
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## Select $w $x $mode -- Binding for double- and triple- clicks.
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# Selects a word or line (according to mode),
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# and sets the selection mode for subsequent drag operations.
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#
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proc ttk::entry::Select {w x mode} {
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variable State
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set cur [ClosestGap $w $x]
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switch -- $mode {
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word { WordSelect $w $cur $cur }
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line { LineSelect $w $cur $cur }
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char { # no-op }
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}
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set State(anchor) $cur
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set State(selectMode) $mode
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}
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## Drag -- Button1 motion binding.
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#
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proc ttk::entry::Drag {w x} {
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variable State
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set State(x) $x
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DragTo $w $x
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}
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## DragTo $w $x -- Extend selection to $x based on current selection mode.
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#
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proc ttk::entry::DragTo {w x} {
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variable State
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set cur [ClosestGap $w $x]
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switch $State(selectMode) {
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char { CharSelect $w $State(anchor) $cur }
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word { WordSelect $w $State(anchor) $cur }
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line { LineSelect $w $State(anchor) $cur }
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none { # no-op }
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}
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}
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## <B1-Leave> binding:
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# Begin autoscroll.
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#
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proc ttk::entry::DragOut {w mode} {
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variable State
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if {$State(selectMode) ne "none" && $mode eq "NotifyNormal"} {
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ttk::Repeatedly ttk::entry::AutoScroll $w
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}
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}
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## <B1-Enter> binding
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# Suspend autoscroll.
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#
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proc ttk::entry::DragIn {w} {
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ttk::CancelRepeat
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}
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## <ButtonRelease-1> binding
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#
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proc ttk::entry::Release {w} {
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variable State
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set State(selectMode) none
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ttk::CancelRepeat ;# suspend autoscroll
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}
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## AutoScroll
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# Called repeatedly when the mouse is outside an entry window
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# with Button 1 down. Scroll the window left or right,
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# depending on where the mouse left the window, and extend
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# the selection according to the current selection mode.
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#
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# TODO: AutoScroll should repeat faster (50ms) than normal autorepeat.
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# TODO: Need a way for Repeat scripts to cancel themselves.
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#
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proc ttk::entry::AutoScroll {w} {
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variable State
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if {![winfo exists $w]} return
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set x $State(x)
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if {$x > [winfo width $w]} {
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$w xview scroll 2 units
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DragTo $w $x
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} elseif {$x < 0} {
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$w xview scroll -2 units
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DragTo $w $x
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}
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}
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## CharSelect -- select characters between index $from and $to
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#
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proc ttk::entry::CharSelect {w from to} {
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if {$to <= $from} {
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$w selection range $to $from
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} else {
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$w selection range $from $to
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}
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$w icursor $to
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}
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## WordSelect -- Select whole words between index $from and $to
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#
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proc ttk::entry::WordSelect {w from to} {
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if {$to < $from} {
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set first [WordBack [$w get] $to]
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set last [WordForward [$w get] $from]
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$w icursor $first
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} else {
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set first [WordBack [$w get] $from]
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set last [WordForward [$w get] $to]
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$w icursor $last
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}
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$w selection range $first $last
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}
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## WordBack, WordForward -- helper routines for WordSelect.
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#
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proc ttk::entry::WordBack {text index} {
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if {[set pos [tcl_wordBreakBefore $text $index]] < 0} { return 0 }
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return $pos
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}
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proc ttk::entry::WordForward {text index} {
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if {[set pos [tcl_wordBreakAfter $text $index]] < 0} { return end }
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return $pos
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}
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## LineSelect -- Select the entire line.
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#
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proc ttk::entry::LineSelect {w _ _} {
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variable State
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$w selection range 0 end
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$w icursor end
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}
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### Button 2 binding procedures.
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#
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## ScanMark -- ButtonPress-2 binding.
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# Marks the start of a scan or primary transfer operation.
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#
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proc ttk::entry::ScanMark {w x} {
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variable State
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set State(scanX) $x
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set State(scanIndex) [$w index @0]
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set State(scanMoved) 0
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}
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## ScanDrag -- Button2 motion binding.
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#
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proc ttk::entry::ScanDrag {w x} {
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variable State
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set dx [expr {$State(scanX) - $x}]
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if {abs($dx) > $State(deadband)} {
|
|
set State(scanMoved) 1
|
|
}
|
|
set left [expr {$State(scanIndex) + ($dx*$State(scanNum))/$State(scanDen)}]
|
|
$w xview $left
|
|
|
|
if {$left != [set newLeft [$w index @0]]} {
|
|
# We've scanned past one end of the entry;
|
|
# reset the mark so that the text will start dragging again
|
|
# as soon as the mouse reverses direction.
|
|
#
|
|
set State(scanX) $x
|
|
set State(scanIndex) $newLeft
|
|
}
|
|
}
|
|
|
|
## ScanRelease -- Button2 release binding.
|
|
# Do a primary transfer if the mouse has not moved since the button press.
|
|
#
|
|
proc ttk::entry::ScanRelease {w x} {
|
|
variable State
|
|
if {!$State(scanMoved)} {
|
|
$w instate {!disabled !readonly} {
|
|
$w icursor [ClosestGap $w $x]
|
|
catch {$w insert insert [::tk::GetSelection $w PRIMARY]}
|
|
}
|
|
}
|
|
}
|
|
|
|
### Insertion and deletion procedures.
|
|
#
|
|
|
|
## PendingDelete -- Delete selection prior to insert.
|
|
# If the entry currently has a selection, delete it and
|
|
# set the insert position to where the selection was.
|
|
# Returns: 1 if pending delete occurred, 0 if nothing was selected.
|
|
#
|
|
proc ttk::entry::PendingDelete {w} {
|
|
if {[$w selection present]} {
|
|
$w icursor sel.first
|
|
$w delete sel.first sel.last
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
|
|
## Insert -- Insert text into the entry widget.
|
|
# If a selection is present, the new text replaces it.
|
|
# Otherwise, the new text is inserted at the insert cursor.
|
|
#
|
|
proc ttk::entry::Insert {w s} {
|
|
if {$s eq ""} { return }
|
|
PendingDelete $w
|
|
$w insert insert $s
|
|
See $w insert
|
|
}
|
|
|
|
## Backspace -- Backspace over the character just before the insert cursor.
|
|
# If there is a selection, delete that instead.
|
|
# If the new insert position is offscreen to the left,
|
|
# scroll to place the cursor at about the middle of the window.
|
|
#
|
|
proc ttk::entry::Backspace {w} {
|
|
if {[PendingDelete $w]} {
|
|
See $w
|
|
return
|
|
}
|
|
set x [expr {[$w index insert] - 1}]
|
|
if {$x < 0} { return }
|
|
|
|
$w delete $x
|
|
|
|
if {[$w index @0] >= [$w index insert]} {
|
|
set range [$w xview]
|
|
set left [lindex $range 0]
|
|
set right [lindex $range 1]
|
|
$w xview moveto [expr {$left - ($right - $left)/2.0}]
|
|
}
|
|
}
|
|
|
|
## Delete -- Delete the character after the insert cursor.
|
|
# If there is a selection, delete that instead.
|
|
#
|
|
proc ttk::entry::Delete {w} {
|
|
if {![PendingDelete $w]} {
|
|
$w delete insert
|
|
}
|
|
}
|
|
|
|
#*EOF*
|