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1 | # scale.tcl -- |
2 | # | |
3 | # This file defines the default bindings for Tk scale widgets and provides | |
4 | # procedures that help in implementing the bindings. | |
5 | # | |
6 | # RCS: @(#) $Id: scale.tcl,v 1.9.2.3 2003/10/03 00:42:17 patthoyts Exp $ | |
7 | # | |
8 | # Copyright (c) 1994 The Regents of the University of California. | |
9 | # Copyright (c) 1994-1995 Sun Microsystems, Inc. | |
10 | # | |
11 | # See the file "license.terms" for information on usage and redistribution | |
12 | # of this file, and for a DISCLAIMER OF ALL WARRANTIES. | |
13 | # | |
14 | ||
15 | #------------------------------------------------------------------------- | |
16 | # The code below creates the default class bindings for entries. | |
17 | #------------------------------------------------------------------------- | |
18 | ||
19 | # Standard Motif bindings: | |
20 | ||
21 | bind Scale <Enter> { | |
22 | if {$tk_strictMotif} { | |
23 | set tk::Priv(activeBg) [%W cget -activebackground] | |
24 | %W config -activebackground [%W cget -background] | |
25 | } | |
26 | tk::ScaleActivate %W %x %y | |
27 | } | |
28 | bind Scale <Motion> { | |
29 | tk::ScaleActivate %W %x %y | |
30 | } | |
31 | bind Scale <Leave> { | |
32 | if {$tk_strictMotif} { | |
33 | %W config -activebackground $tk::Priv(activeBg) | |
34 | } | |
35 | if {[string equal [%W cget -state] "active"]} { | |
36 | %W configure -state normal | |
37 | } | |
38 | } | |
39 | bind Scale <1> { | |
40 | tk::ScaleButtonDown %W %x %y | |
41 | } | |
42 | bind Scale <B1-Motion> { | |
43 | tk::ScaleDrag %W %x %y | |
44 | } | |
45 | bind Scale <B1-Leave> { } | |
46 | bind Scale <B1-Enter> { } | |
47 | bind Scale <ButtonRelease-1> { | |
48 | tk::CancelRepeat | |
49 | tk::ScaleEndDrag %W | |
50 | tk::ScaleActivate %W %x %y | |
51 | } | |
52 | bind Scale <2> { | |
53 | tk::ScaleButton2Down %W %x %y | |
54 | } | |
55 | bind Scale <B2-Motion> { | |
56 | tk::ScaleDrag %W %x %y | |
57 | } | |
58 | bind Scale <B2-Leave> { } | |
59 | bind Scale <B2-Enter> { } | |
60 | bind Scale <ButtonRelease-2> { | |
61 | tk::CancelRepeat | |
62 | tk::ScaleEndDrag %W | |
63 | tk::ScaleActivate %W %x %y | |
64 | } | |
65 | if {[string equal $tcl_platform(platform) "windows"]} { | |
66 | # On Windows do the same with button 3, as that is the right mouse button | |
67 | bind Scale <3> [bind Scale <2>] | |
68 | bind Scale <B3-Motion> [bind Scale <B2-Motion>] | |
69 | bind Scale <B3-Leave> [bind Scale <B2-Leave>] | |
70 | bind Scale <B3-Enter> [bind Scale <B2-Enter>] | |
71 | bind Scale <ButtonRelease-3> [bind Scale <ButtonRelease-2>] | |
72 | } | |
73 | bind Scale <Control-1> { | |
74 | tk::ScaleControlPress %W %x %y | |
75 | } | |
76 | bind Scale <Up> { | |
77 | tk::ScaleIncrement %W up little noRepeat | |
78 | } | |
79 | bind Scale <Down> { | |
80 | tk::ScaleIncrement %W down little noRepeat | |
81 | } | |
82 | bind Scale <Left> { | |
83 | tk::ScaleIncrement %W up little noRepeat | |
84 | } | |
85 | bind Scale <Right> { | |
86 | tk::ScaleIncrement %W down little noRepeat | |
87 | } | |
88 | bind Scale <Control-Up> { | |
89 | tk::ScaleIncrement %W up big noRepeat | |
90 | } | |
91 | bind Scale <Control-Down> { | |
92 | tk::ScaleIncrement %W down big noRepeat | |
93 | } | |
94 | bind Scale <Control-Left> { | |
95 | tk::ScaleIncrement %W up big noRepeat | |
96 | } | |
97 | bind Scale <Control-Right> { | |
98 | tk::ScaleIncrement %W down big noRepeat | |
99 | } | |
100 | bind Scale <Home> { | |
101 | %W set [%W cget -from] | |
102 | } | |
103 | bind Scale <End> { | |
104 | %W set [%W cget -to] | |
105 | } | |
106 | ||
107 | # ::tk::ScaleActivate -- | |
108 | # This procedure is invoked to check a given x-y position in the | |
109 | # scale and activate the slider if the x-y position falls within | |
110 | # the slider. | |
111 | # | |
112 | # Arguments: | |
113 | # w - The scale widget. | |
114 | # x, y - Mouse coordinates. | |
115 | ||
116 | proc ::tk::ScaleActivate {w x y} { | |
117 | if {[string equal [$w cget -state] "disabled"]} { | |
118 | return | |
119 | } | |
120 | if {[string equal [$w identify $x $y] "slider"]} { | |
121 | set state active | |
122 | } else { | |
123 | set state normal | |
124 | } | |
125 | if {[string compare [$w cget -state] $state]} { | |
126 | $w configure -state $state | |
127 | } | |
128 | } | |
129 | ||
130 | # ::tk::ScaleButtonDown -- | |
131 | # This procedure is invoked when a button is pressed in a scale. It | |
132 | # takes different actions depending on where the button was pressed. | |
133 | # | |
134 | # Arguments: | |
135 | # w - The scale widget. | |
136 | # x, y - Mouse coordinates of button press. | |
137 | ||
138 | proc ::tk::ScaleButtonDown {w x y} { | |
139 | variable ::tk::Priv | |
140 | set Priv(dragging) 0 | |
141 | set el [$w identify $x $y] | |
142 | ||
143 | # save the relief | |
144 | set Priv($w,relief) [$w cget -sliderrelief] | |
145 | ||
146 | if {[string equal $el "trough1"]} { | |
147 | ScaleIncrement $w up little initial | |
148 | } elseif {[string equal $el "trough2"]} { | |
149 | ScaleIncrement $w down little initial | |
150 | } elseif {[string equal $el "slider"]} { | |
151 | set Priv(dragging) 1 | |
152 | set Priv(initValue) [$w get] | |
153 | set coords [$w coords] | |
154 | set Priv(deltaX) [expr {$x - [lindex $coords 0]}] | |
155 | set Priv(deltaY) [expr {$y - [lindex $coords 1]}] | |
156 | switch -exact -- $Priv($w,relief) { | |
157 | "raised" { $w configure -sliderrelief sunken } | |
158 | "ridge" { $w configure -sliderrelief groove } | |
159 | } | |
160 | } | |
161 | } | |
162 | ||
163 | # ::tk::ScaleDrag -- | |
164 | # This procedure is called when the mouse is dragged with | |
165 | # mouse button 1 down. If the drag started inside the slider | |
166 | # (i.e. the scale is active) then the scale's value is adjusted | |
167 | # to reflect the mouse's position. | |
168 | # | |
169 | # Arguments: | |
170 | # w - The scale widget. | |
171 | # x, y - Mouse coordinates. | |
172 | ||
173 | proc ::tk::ScaleDrag {w x y} { | |
174 | variable ::tk::Priv | |
175 | if {!$Priv(dragging)} { | |
176 | return | |
177 | } | |
178 | $w set [$w get [expr {$x-$Priv(deltaX)}] [expr {$y-$Priv(deltaY)}]] | |
179 | } | |
180 | ||
181 | # ::tk::ScaleEndDrag -- | |
182 | # This procedure is called to end an interactive drag of the | |
183 | # slider. It just marks the drag as over. | |
184 | # | |
185 | # Arguments: | |
186 | # w - The scale widget. | |
187 | ||
188 | proc ::tk::ScaleEndDrag {w} { | |
189 | variable ::tk::Priv | |
190 | set Priv(dragging) 0 | |
191 | if {[info exists Priv($w,relief)]} { | |
192 | $w configure -sliderrelief $Priv($w,relief) | |
193 | unset Priv($w,relief) | |
194 | } | |
195 | } | |
196 | ||
197 | # ::tk::ScaleIncrement -- | |
198 | # This procedure is invoked to increment the value of a scale and | |
199 | # to set up auto-repeating of the action if that is desired. The | |
200 | # way the value is incremented depends on the "dir" and "big" | |
201 | # arguments. | |
202 | # | |
203 | # Arguments: | |
204 | # w - The scale widget. | |
205 | # dir - "up" means move value towards -from, "down" means | |
206 | # move towards -to. | |
207 | # big - Size of increments: "big" or "little". | |
208 | # repeat - Whether and how to auto-repeat the action: "noRepeat" | |
209 | # means don't auto-repeat, "initial" means this is the | |
210 | # first action in an auto-repeat sequence, and "again" | |
211 | # means this is the second repetition or later. | |
212 | ||
213 | proc ::tk::ScaleIncrement {w dir big repeat} { | |
214 | variable ::tk::Priv | |
215 | if {![winfo exists $w]} return | |
216 | if {[string equal $big "big"]} { | |
217 | set inc [$w cget -bigincrement] | |
218 | if {$inc == 0} { | |
219 | set inc [expr {abs([$w cget -to] - [$w cget -from])/10.0}] | |
220 | } | |
221 | if {$inc < [$w cget -resolution]} { | |
222 | set inc [$w cget -resolution] | |
223 | } | |
224 | } else { | |
225 | set inc [$w cget -resolution] | |
226 | } | |
227 | if {([$w cget -from] > [$w cget -to]) ^ [string equal $dir "up"]} { | |
228 | set inc [expr {-$inc}] | |
229 | } | |
230 | $w set [expr {[$w get] + $inc}] | |
231 | ||
232 | if {[string equal $repeat "again"]} { | |
233 | set Priv(afterId) [after [$w cget -repeatinterval] \ | |
234 | [list tk::ScaleIncrement $w $dir $big again]] | |
235 | } elseif {[string equal $repeat "initial"]} { | |
236 | set delay [$w cget -repeatdelay] | |
237 | if {$delay > 0} { | |
238 | set Priv(afterId) [after $delay \ | |
239 | [list tk::ScaleIncrement $w $dir $big again]] | |
240 | } | |
241 | } | |
242 | } | |
243 | ||
244 | # ::tk::ScaleControlPress -- | |
245 | # This procedure handles button presses that are made with the Control | |
246 | # key down. Depending on the mouse position, it adjusts the scale | |
247 | # value to one end of the range or the other. | |
248 | # | |
249 | # Arguments: | |
250 | # w - The scale widget. | |
251 | # x, y - Mouse coordinates where the button was pressed. | |
252 | ||
253 | proc ::tk::ScaleControlPress {w x y} { | |
254 | set el [$w identify $x $y] | |
255 | if {[string equal $el "trough1"]} { | |
256 | $w set [$w cget -from] | |
257 | } elseif {[string equal $el "trough2"]} { | |
258 | $w set [$w cget -to] | |
259 | } | |
260 | } | |
261 | ||
262 | # ::tk::ScaleButton2Down | |
263 | # This procedure is invoked when button 2 is pressed over a scale. | |
264 | # It sets the value to correspond to the mouse position and starts | |
265 | # a slider drag. | |
266 | # | |
267 | # Arguments: | |
268 | # w - The scrollbar widget. | |
269 | # x, y - Mouse coordinates within the widget. | |
270 | ||
271 | proc ::tk::ScaleButton2Down {w x y} { | |
272 | variable ::tk::Priv | |
273 | ||
274 | if {[string equal [$w cget -state] "disabled"]} { | |
275 | return | |
276 | } | |
277 | $w configure -state active | |
278 | $w set [$w get $x $y] | |
279 | set Priv(dragging) 1 | |
280 | set Priv(initValue) [$w get] | |
281 | set Priv($w,relief) [$w cget -sliderrelief] | |
282 | set coords "$x $y" | |
283 | set Priv(deltaX) 0 | |
284 | set Priv(deltaY) 0 | |
285 | } |