summaryrefslogtreecommitdiffstats
path: root/library/ttk/treeview.tcl
blob: 87725875ed10405a3f0c1472860b892f62994613 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
#
# ttk::treeview widget bindings and utilities.
#

namespace eval ttk::treeview {
    variable State

    # Enter/Leave/Motion
    #
    set State(activeWidget) 	{}
    set State(activeHeading) 	{}

    # Press/drag/release:
    #
    set State(pressMode) 	none
    set State(pressX)		0

    # For pressMode == "resize"
    set State(resizeColumn)	#0

    # For pressmode == "heading"
    set State(heading)  	{}
}

### Widget bindings.
#

bind Treeview	<Motion> 		{ ttk::treeview::Motion %W %x %y }
bind Treeview	<B1-Leave>		{ #nothing }
bind Treeview	<Leave>			{ ttk::treeview::ActivateHeading {} {}}
bind Treeview	<ButtonPress-1> 	{ ttk::treeview::Press %W %x %y }
bind Treeview	<Double-ButtonPress-1> 	{ ttk::treeview::DoubleClick %W %x %y }
bind Treeview	<ButtonRelease-1> 	{ ttk::treeview::Release %W %x %y }
bind Treeview	<B1-Motion> 		{ ttk::treeview::Drag %W %x %y }
bind Treeview 	<KeyPress-Up>    	{ ttk::treeview::Keynav %W up }
bind Treeview 	<KeyPress-Down>  	{ ttk::treeview::Keynav %W down }
bind Treeview 	<KeyPress-Right> 	{ ttk::treeview::Keynav %W right }
bind Treeview 	<KeyPress-Left>  	{ ttk::treeview::Keynav %W left }
bind Treeview	<KeyPress-Prior>	{ %W yview scroll -1 pages }
bind Treeview	<KeyPress-Next> 	{ %W yview scroll  1 pages }
bind Treeview	<KeyPress-Return>	{ ttk::treeview::ToggleFocus %W }
bind Treeview	<KeyPress-space>	{ ttk::treeview::ToggleFocus %W }

bind Treeview	<Shift-ButtonPress-1> \
		{ ttk::treeview::Select %W %x %y extend }
bind Treeview	<<ToggleSelection>> \
		{ ttk::treeview::Select %W %x %y toggle }

ttk::copyBindings TtkScrollable Treeview 

### Binding procedures.
#

## Keynav -- Keyboard navigation
#
# @@@ TODO: verify/rewrite up and down code.
#
proc ttk::treeview::Keynav {w dir} {
    set focus [$w focus]
    if {$focus eq ""} { return }

    switch -- $dir {
	up {
	    if {[set up [$w prev $focus]] eq ""} {
	        set focus [$w parent $focus]
	    } else {
		while {[$w item $up -open] && [llength [$w children $up]]} {
		    set up [lindex [$w children $up] end]
		}
		set focus $up
	    }
	}
	down {
	    if {[$w item $focus -open] && [llength [$w children $focus]]} {
	        set focus [lindex [$w children $focus] 0]
	    } else {
		set up $focus
		while {$up ne "" && [set down [$w next $up]] eq ""} {
		    set up [$w parent $up]
		}
		set focus $down
	    }
	}
	left {
	    if {[$w item $focus -open] && [llength [$w children $focus]]} {
	    	CloseItem $w $focus
	    } else {
	    	set focus [$w parent $focus]
	    }
	}
	right {
	    OpenItem $w $focus
	}
    }

    if {$focus != {}} {
	SelectOp $w $focus choose
    }
}

## Motion -- pointer motion binding.
#	Sets cursor, active element ...
#
proc ttk::treeview::Motion {w x y} {
    set cursor {}
    set activeHeading {}

    switch -- [$w identify region $x $y] {
	separator { set cursor hresize }
	heading { set activeHeading [$w identify column $x $y] }
    }

    ttk::setCursor $w $cursor
    ActivateHeading $w $activeHeading
}

## ActivateHeading -- track active heading element
#
proc ttk::treeview::ActivateHeading {w heading} {
    variable State

    if {$w != $State(activeWidget) || $heading != $State(activeHeading)} {
	if {$State(activeHeading) != {}} {
	    $State(activeWidget) heading $State(activeHeading) state !active
	}
	if {$heading != {}} {
	    $w heading $heading state active
	}
	set State(activeHeading) $heading
	set State(activeWidget) $w
    }
}

## Select $w $x $y $selectop
#	Binding procedure for selection operations.
#	See "Selection modes", below.
#
proc ttk::treeview::Select {w x y op} {
    if {[set item [$w identify row $x $y]] ne "" } {
	SelectOp $w $item $op
    }
}

## DoubleClick -- Double-ButtonPress-1 binding.
#
proc ttk::treeview::DoubleClick {w x y} {
    if {[set row [$w identify row $x $y]] ne ""} {
	Toggle $w $row
    } else {
	Press $w $x $y ;# perform single-click action
    }
}

## Press -- ButtonPress binding.
#
proc ttk::treeview::Press {w x y} {
    focus $w
    switch -- [$w identify region $x $y] {
	nothing { }
	heading { heading.press $w $x $y }
	separator { resize.press $w $x $y }
	tree -
	cell {
	    set item [$w identify item $x $y]
	    SelectOp $w $item choose
	    switch -glob -- [$w identify element $x $y] {
		*indicator -
		*disclosure { Toggle $w $item }
	    }
	}
    }
}

## Drag -- B1-Motion binding
#
proc ttk::treeview::Drag {w x y} {
    variable State
    switch $State(pressMode) {
	resize	{ resize.drag $w $x }
	heading	{ heading.drag $w $x $y }
    }
}

proc ttk::treeview::Release {w x y} {
    variable State
    switch $State(pressMode) {
	resize	{ resize.release $w $x }
	heading	{ heading.release $w }
    }
    set State(pressMode) none
    Motion $w $x $y
}

### Interactive column resizing.
#
proc ttk::treeview::resize.press {w x y} {
    variable State
    set State(pressMode) "resize"
    set State(resizeColumn) [$w identify column $x $y]
}

proc ttk::treeview::resize.drag {w x} {
    variable State
    $w drag $State(resizeColumn) $x
}

proc ttk::treeview::resize.release {w x} {
    # no-op
}

### Heading activation.
#

proc ttk::treeview::heading.press {w x y} {
    variable State
    set column [$w identify column $x $y]
    set State(pressMode) "heading"
    set State(heading) $column
    $w heading $column state pressed
}

proc ttk::treeview::heading.drag {w x y} {
    variable State
    if {   [$w identify region $x $y] eq "heading"
        && [$w identify column $x $y] eq $State(heading)
    } {
    	$w heading $State(heading) state pressed
    } else {
    	$w heading $State(heading) state !pressed
    }
}

proc ttk::treeview::heading.release {w} {
    variable State
    if {[lsearch -exact [$w heading $State(heading) state] pressed] >= 0} {
	after 0 [$w heading $State(heading) -command]
    }
    $w heading $State(heading) state !pressed
}

### Selection modes.
#

## SelectOp $w $item [ choose | extend | toggle ] --
#	Dispatch to appropriate selection operation
#	depending on current value of -selectmode.
#
proc ttk::treeview::SelectOp {w item op} {
    select.$op.[$w cget -selectmode] $w $item
}

## -selectmode none:
#
proc ttk::treeview::select.choose.none {w item} { $w focus $item }
proc ttk::treeview::select.toggle.none {w item} { $w focus $item }
proc ttk::treeview::select.extend.none {w item} { $w focus $item }

## -selectmode browse:
#
proc ttk::treeview::select.choose.browse {w item} { BrowseTo $w $item }
proc ttk::treeview::select.toggle.browse {w item} { BrowseTo $w $item }
proc ttk::treeview::select.extend.browse {w item} { BrowseTo $w $item }

## -selectmode multiple:
#
proc ttk::treeview::select.choose.extended {w item} {
    BrowseTo $w $item
}
proc ttk::treeview::select.toggle.extended {w item} {
    $w selection toggle [list $item]
}
proc ttk::treeview::select.extend.extended {w item} {
    if {[set anchor [$w focus]] ne ""} {
	$w selection set [between $w $anchor $item]
    } else {
    	BrowseTo $w $item
    }
}

### Tree structure utilities.
#

## between $tv $item1 $item2 --
#	Returns a list of all items between $item1 and $item2,
#	in preorder traversal order.  $item1 and $item2 may be
#	in either order.
#
# NOTES:
#	This routine is O(N) in the size of the tree.
#	There's probably a way to do this that's O(N) in the number
#	of items returned, but I'm not clever enough to figure it out.
#
proc ttk::treeview::between {tv item1 item2} {
    variable between [list]
    variable selectingBetween 0
    ScanBetween $tv $item1 $item2 {}
    return $between
}

## ScanBetween --
#	Recursive worker routine for ttk::treeview::between
#
proc ttk::treeview::ScanBetween {tv item1 item2 item} {
    variable between
    variable selectingBetween

    if {$item eq $item1 || $item eq $item2} {
    	lappend between $item
	set selectingBetween [expr {!$selectingBetween}]
    } elseif {$selectingBetween} {
    	lappend between $item
    }
    foreach child [$tv children $item] {
	ScanBetween $tv $item1 $item2 $child
    }
}

### User interaction utilities.
#

## OpenItem, CloseItem -- Set the open state of an item, generate event
#

proc ttk::treeview::OpenItem {w item} {
    $w focus $item
    event generate $w <<TreeviewOpen>>
    $w item $item -open true
}

proc ttk::treeview::CloseItem {w item} {
    $w item $item -open false
    $w focus $item
    event generate $w <<TreeviewClose>>
}

## Toggle -- toggle opened/closed state of item
#
proc ttk::treeview::Toggle {w item} {
    if {[$w item $item -open]} {
	CloseItem $w $item
    } else {
	OpenItem $w $item
    }
}

## ToggleFocus -- toggle opened/closed state of focus item
#
proc ttk::treeview::ToggleFocus {w} {
    set item [$w focus]
    if {$item ne ""} {
    	Toggle $w $item
    }
}

## BrowseTo -- navigate to specified item; set focus and selection
#
proc ttk::treeview::BrowseTo {w item} {
    $w see $item
    $w focus $item
    $w selection set [list $item]
}

#*EOF*