1# twind.rb
2#
3# This demonstration script creates a text widget with a bunch of
4# embedded windows.
5#
6# text (embedded windows) widget demo (called by 'widget')
7#
8
9# toplevel widget
10if defined?($twind_demo) && $twind_demo
11  $twind_demo.destroy
12  $twind_demo = nil
13end
14
15# demo toplevel widget
16$twind_demo = TkToplevel.new {|w|
17  title("Text Demonstration - Embedded Windows")
18  iconname("Embedded Windows")
19  positionWindow(w)
20}
21
22base_frame = TkFrame.new($twind_demo).pack(:fill=>:both, :expand=>true)
23
24# frame
25$twind_buttons = TkFrame.new(base_frame) {|frame|
26  TkButton.new(frame) {
27    text 'Dismiss'
28    command proc{
29      tmppath = $twind_demo
30      $twind_demo = nil
31      tmppath.destroy
32    }
33  }.pack('side'=>'left', 'expand'=>'yes')
34
35  TkButton.new(frame) {
36    text 'Show Code'
37    command proc{showCode 'twind'}
38  }.pack('side'=>'left', 'expand'=>'yes')
39}
40$twind_buttons.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
41
42# frame
43$twind_text = nil
44TkFrame.new(base_frame, 'highlightthickness'=>2, 'borderwidth'=>2,
45            'relief'=>'sunken') {|f|
46  $twind_text = TkText.new(f, 'setgrid'=>'true', 'font'=>$font,
47                          'width'=>'70', 'height'=>35, 'wrap'=>'word',
48                          'highlightthickness'=>0, 'borderwidth'=>0 ){|t|
49    TkScrollbar.new(f) {|s|
50      command proc{|*args| t.yview(*args)}
51      t.yscrollcommand proc{|first,last| s.set first,last}
52    }.pack('side'=>'right', 'fill'=>'y')
53  }.pack('expand'=>'yes', 'fill'=>'both')
54}.pack('expand'=>'yes', 'fill'=>'both')
55
56#
57$tag_center = TkTextTag.new($twind_text,
58                            'justify' =>'center',
59                            'spacing1'=>'5m',
60                            'spacing3'=>'5m'  )
61$tag_buttons = TkTextTag.new($twind_text,
62                             'lmargin1'=>'1c',
63                             'lmargin2'=>'1c',
64                             'rmargin' =>'1c',
65                             'spacing1'=>'3m',
66                             'spacing2'=>0,
67                             'spacing3'=>0 )
68
69$twind_text.insert('end', "A text widget can contain other widgets embedded ")
70$twind_text.insert('end', "it.  These are called \"embedded windows\", ")
71$twind_text.insert('end', "and they can consist of arbitrary widgets.  ")
72$twind_text.insert('end', "For example, here are two embedded button ")
73$twind_text.insert('end', "widgets.  You can click on the first button to ")
74TkTextWindow.new($twind_text, 'end',
75                 'window'=>TkButton.new($twind_text) {
76                   #text 'ON'
77                   text 'Turn On'
78                   command proc{textWindOn $twind_text,$twind_buttons}
79                   cursor 'top_left_arrow'
80                 })
81$twind_text.insert('end', " horizontal scrolling, which also turns off ")
82$twind_text.insert('end', "word wrapping.  Or, you can click on the second ")
83$twind_text.insert('end', "button to\n")
84TkTextWindow.new($twind_text, 'end',
85                 'window'=>TkButton.new($twind_text) {
86                   #text 'OFF'
87                   text 'Turn Off'
88                   command proc{textWindOff $twind_text}
89                   cursor 'top_left_arrow'
90                 })
91
92$twind_text.insert('end', " horizontal scrolling and turn back on word wrapping.\n\n")
93$twind_text.insert('end', "Or, here is another example.  If you ")
94TkTextWindow.new($twind_text, 'end',
95                 'window'=>TkButton.new($twind_text) {
96                   text 'Click Here'
97                   command proc{textWindPlot $twind_text}
98                   cursor 'top_left_arrow'
99                 })
100$twind_text.insert('end', " a canvas displaying an x-y plot will appear right here.")
101$mark_plot = TkTextMark.new($twind_text, 'insert')
102$mark_plot.gravity='left'
103$twind_text.insert('end', "  You can drag the data points around with the mouse, ")
104$twind_text.insert('end', "or you can click here to ")
105TkTextWindow.new($twind_text, 'end',
106                 'window'=>TkButton.new($twind_text) {
107                   text 'Delete'
108                   command proc{textWindDel $twind_text}
109                   cursor 'top_left_arrow'
110                 })
111
112$twind_text.insert('end', " the plot again.\n\n")
113$twind_text.insert('end', "You may also find it useful to put embedded windows in ")
114$twind_text.insert('end', "a text without any actual text.  In this case the ")
115$twind_text.insert('end', "text widget acts like a geometry manager.  For ")
116$twind_text.insert('end', "example, here is a collection of buttons laid out ")
117$twind_text.insert('end', "neatly into rows by the text widget.  These buttons ")
118$twind_text.insert('end', "can be used to change the background color of the ")
119$twind_text.insert('end', "text widget (\"Default\" restores the color to ")
120$twind_text.insert('end', "its default).  If you click on the button labeled ")
121$twind_text.insert('end', "\"Short\", it changes to a longer string so that ")
122$twind_text.insert('end', "you can see how the text widget automatically ")
123$twind_text.insert('end', "changes the layout.  Click on the button again ")
124$twind_text.insert('end', "to restore the short string.\n")
125
126
127TkTextWindow.new($twind_text, 'end',
128                 'window'=>TkButton.new($twind_text) {|b|
129                   text 'Default'
130                   command proc{embDefBg $twind_text}
131                   cursor 'top_left_arrow'
132                   $tag_buttons.add('end')
133                 },
134                 'padx'=>3 )
135embToggle = TkVariable.new('Short')
136TkTextWindow.new($twind_text, 'end',
137                 'window'=>TkCheckButton.new($twind_text) {
138                   textvariable embToggle
139                   indicatoron 0
140                   variable embToggle
141                   onvalue 'A much longer string'
142                   offvalue 'Short'
143                   cursor 'top_left_arrow'
144                   pady 5
145                   padx 2
146                 },
147                 'padx'=>3,
148                 'pady'=>2 )
149
150[ 'AntiqueWhite3', 'Bisque1', 'Bisque2', 'Bisque3', 'Bisque4',
151  'SlateBlue3', 'RoyalBlue1', 'SteelBlue2', 'DeepSkyBlue3', 'LightBlue1',
152  'DarkSlateGray1', 'Aquamarine2', 'DarkSeaGreen2', 'SeaGreen1',
153  'Yellow1', 'IndianRed1', 'IndianRed2', 'Tan1', 'Tan4'
154].each{|twind_color|
155  TkTextWindow.new($twind_text, 'end',
156                   'window'=>TkButton.new($twind_text) {
157                     text twind_color
158                     cursor 'top_left_arrow'
159                     command proc{$twind_text.bg twind_color}
160                   },
161                   'padx'=>3,
162                   'pady'=>2 )
163}
164
165#
166def textWindOn (w,f)
167  if defined? $twind_scroll
168    begin
169      $twind_scroll.destroy
170    rescue
171    end
172    $twind_scroll = nil
173  end
174
175  base = TkWinfo.parent( TkWinfo.parent(w) )
176  $twind_scroll = TkScrollbar.new(base) {|s|
177    orient 'horizontal'
178    command proc{|*args| w.xview(*args)}
179    w.xscrollcommand proc{|first,last| s.set first,last}
180    w.wrap 'none'
181    pack('after'=>f, 'side'=>'bottom', 'fill'=>'x')
182  }
183
184  return nil
185end
186
187def textWindOff (w)
188  if defined? $twind_scroll
189    begin
190      $twind_scroll.destroy
191    rescue
192    end
193    $twind_scroll = nil
194  end
195  w.xscrollcommand ''
196  w.wrap 'word'
197end
198
199def textWindPlot (t)
200  if (defined? $twind_plot) && TkWinfo.exist?($twind_plot)
201    return
202  end
203
204  $twind_plot = TkCanvas.new(t) {
205    relief 'sunken'
206    width  450
207    height 300
208    cursor 'top_left_arrow'
209  }
210
211  if $tk_version =~ /^4.*/
212    font = '-Adobe-Helvetica-Medium-R-Normal--*-180-*-*-*-*-*-*'
213  else
214    font = 'Helvetica 18'
215  end
216
217  TkcLine.new($twind_plot, 100, 250, 400, 250, 'width'=>2)
218  TkcLine.new($twind_plot, 100, 250, 100,  50, 'width'=>2)
219  TkcText.new($twind_plot, 225, 20,
220              'text'=>"A Simple Plot", 'font'=>font, 'fill'=>'brown')
221
222  (0..10).each {|i|
223    x = 100 + (i * 30)
224    TkcLine.new($twind_plot, x, 250, x, 245, 'width'=>2)
225    TkcText.new($twind_plot, x, 254,
226                'text'=>10*i, 'font'=>font, 'anchor'=>'n')
227  }
228  (0..5).each {|i|
229    y = 250 - (i * 40)
230    TkcLine.new($twind_plot, 100, y, 105, y, 'width'=>2)
231    TkcText.new($twind_plot, 96, y,
232                'text'=>"#{i*50}.0", 'font'=>font, 'anchor'=>'e')
233  }
234
235  for xx, yy in [[12,56],[20,94],[33,98],[32,120],[61,180],[75,160],[98,223]]
236    x = 100 + (3*xx)
237    y = 250 - (4*yy)/5
238    item = TkcOval.new($twind_plot, x-6, y-6, x+6, y+6,
239                       'width'=>1, 'outline'=>'black', 'fill'=>'SkyBlue2')
240    item.addtag 'point'
241  end
242
243  $twind_plot.itembind('point', 'Any-Enter',
244                        proc{$twind_plot.itemconfigure 'current', 'fill', 'red'})
245  $twind_plot.itembind('point', 'Any-Leave',
246                        proc{$twind_plot.itemconfigure 'current', 'fill', 'SkyBlue2'})
247  $twind_plot.itembind('point', '1',
248                        proc{|x,y| embPlotDown $twind_plot,x,y}, "%x %y")
249  $twind_plot.itembind('point', 'ButtonRelease-1',
250                        proc{$twind_plot.dtag 'selected'})
251  $twind_plot.bind('B1-Motion',
252                    proc{|x,y| embPlotMove $twind_plot,x,y}, "%x %y")
253  while ($twind_text.get($mark_plot) =~ /[ \t\n]/)
254    $twind_text.delete $mark_plot
255  end
256  $twind_text.insert $mark_plot,"\n"
257  TkTextWindow.new($twind_text, $mark_plot, 'window'=>$twind_plot)
258  $tag_center.add $mark_plot
259  $twind_text.insert $mark_plot,"\n"
260end
261
262$embPlot = {'lastX'=>0, 'lastY'=>0}
263
264def embPlotDown (w, x, y)
265  w.dtag 'selected'
266  w.addtag_withtag 'selected', 'current'
267  w.raise 'current'
268  $embPlot['lastX'] = x
269  $embPlot['lastY'] = y
270end
271
272def embPlotMove (w, x, y)
273  w.move 'selected', x - $embPlot['lastX'], y - $embPlot['lastY']
274  $embPlot['lastX'] = x
275  $embPlot['lastY'] = y
276end
277
278def textWindDel (w)
279  if (defined? $twind_text) && TkWinfo.exist?($twind_plot)
280    $twind_text.delete $twind_plot
281    $twind_plot = nil
282    while ($twind_text.get($mark_plot) =~ /[ \t\n]/)
283      $twind_text.delete $mark_plot
284    end
285    $twind_text.insert $mark_plot,"  "
286  end
287end
288
289def embDefBg (w)
290  w['background'] = w.configinfo('background')[3]
291end
292