![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to mkItems.tcl CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Micropolis - Activity] / micropolis / src / tk / library / demos|
Return to mkItems.tcl CVS log | Up to [Micropolis - Activity] / micropolis / src / tk / library / demos |
1.1 root 1: # mkItems w
2: #
3: # Create a top-level window containing a canvas that displays the
4: # various item types and allows them to be selected and moved. This
5: # demo can be used to test out the point-hit and rectangle-hit code
6: # for items.
7: #
8: # Arguments:
9: # w - Name to use for new top-level window.
10:
11: proc mkItems {{w .citems}} {
12: global c tk_library
13: catch {destroy $w}
14: toplevel $w
15: dpos $w
16: wm title $w "Canvas Item Demonstration"
17: wm iconname $w "Items"
18: wm minsize $w 100 100
19: set c $w.frame2.c
20:
21: frame $w.frame1 -relief raised -bd 2
22: frame $w.frame2 -relief raised -bd 2
23: button $w.ok -text "OK" -command "destroy $w"
24: pack append $w $w.frame1 {top fill} $w.frame2 {top fill expand} \
25: $w.ok {bottom pady 10 frame center}
26: message $w.frame1.m -font -Adobe-Times-Medium-R-Normal-*-180-* -aspect 300 \
27: -text "This window contains a canvas widget with examples of the various kinds of items supported by canvases. The following operations are supported:\n Button-1 drag:\tmoves item under pointer.\n Button-2 drag:\trepositions view.\n Button-3 drag:\tstrokes out area.\n Ctrl+f:\t\tprints items under area."
28: pack append $w.frame1 $w.frame1.m {frame center}
29:
30: canvas $c -scrollregion {0c 0c 30c 24c} -width 15c -height 10c
31: scrollbar $w.frame2.vscroll -relief sunken -command "$c yview"
32: scrollbar $w.frame2.hscroll -orient horiz -relief sunken -command "$c xview"
33: pack append $w.frame2 $w.frame2.hscroll {bottom fillx} \
34: $w.frame2.vscroll {right filly} $c {expand fill}
35: $c config -xscroll "$w.frame2.hscroll set" -yscroll "$w.frame2.vscroll set"
36:
37: # Display a 3x3 rectangular grid.
38:
39: $c create rect 0c 0c 30c 24c -width 2
40: $c create line 0c 8c 30c 8c -width 2
41: $c create line 0c 16c 30c 16c -width 2
42: $c create line 10c 0c 10c 24c -width 2
43: $c create line 20c 0c 20c 24c -width 2
44:
45: set font1 -Adobe-Helvetica-Medium-R-Normal-*-120-*
46: set font2 -Adobe-Helvetica-Bold-R-Normal-*-240-*
47: if {[winfo screendepth $c] > 4} {
48: set blue DeepSkyBlue3
49: set red red
50: set bisque bisque3
51: set green SeaGreen3
52: } else {
53: set blue black
54: set red black
55: set bisque black
56: set green black
57: }
58:
59: # Set up demos within each of the areas of the grid.
60:
61: $c create text 5c .2c -text Lines -anchor n
62: $c create line 1c 1c 3c 1c 1c 4c 3c 4c -width 2m -fill $blue \
63: -cap butt -join miter -tags item
64: $c create line 4.67c 1c 4.67c 4c -arrow last -tags item
65: $c create line 6.33c 1c 6.33c 4c -arrow both -tags item
66: $c create line 5c 6c 9c 6c 9c 1c 8c 1c 8c 4.8c 8.8c 4.8c 8.8c 1.2c \
67: 8.2c 1.2c 8.2c 4.6c 8.6c 4.6c 8.6c 1.4c 8.4c 1.4c 8.4c 4.4c \
68: -width 3 -fill $red -tags item
69: $c create line 1c 5c 7c 5c 7c 7c 9c 7c -width .5c \
70: -stipple @$tk_library/demos/bitmaps/grey.25 \
71: -arrow both -arrowshape {15 15 7} -tags item
72: $c create line 1c 7c 1.75c 5.8c 2.5c 7c 3.25c 5.8c 4c 7c -width .5c \
73: -cap round -join round -tags item
74:
75: $c create text 15c .2c -text "Curves (smoothed lines)" -anchor n
76: $c create line 11c 4c 11.5c 1c 13.5c 1c 14c 4c -smooth on \
77: -fill $blue -tags item
78: $c create line 15.5c 1c 19.5c 1.5c 15.5c 4.5c 19.5c 4c -smooth on \
79: -arrow both -width 3 -tags item
80: $c create line 12c 6c 13.5c 4.5c 16.5c 7.5c 18c 6c \
81: 16.5c 4.5c 13.5c 7.5c 12c 6c -smooth on -width 3m -cap round \
82: -stipple @$tk_library/demos/bitmaps/grey.25 -fill $red -tags item
83:
84: $c create text 25c .2c -text Polygons -anchor n
85: $c create polygon 21c 1.0c 22.5c 1.75c 24c 1.0c 23.25c 2.5c \
86: 24c 4.0c 22.5c 3.25c 21c 4.0c 21.75c 2.5c -fill $green -tags item
87: $c create polygon 25c 4c 25c 4c 25c 1c 26c 1c 27c 4c 28c 1c \
88: 29c 1c 29c 4c 29c 4c -fill $red -smooth on -tags item
89: $c create polygon 22c 4.5c 25c 4.5c 25c 6.75c 28c 6.75c \
90: 28c 5.25c 24c 5.25c 24c 6.0c 26c 6c 26c 7.5c 22c 7.5c \
91: -stipple @$tk_library/demos/bitmaps/grey.25 -tags item
92:
93: $c create text 5c 8.2c -text Rectangles -anchor n
94: $c create rectangle 1c 9.5c 4c 12.5c -outline $red -width 3m -tags item
95: $c create rectangle 0.5c 13.5c 4.5c 15.5c -fill $green -tags item
96: $c create rectangle 6c 10c 9c 15c -outline {} \
97: -stipple @$tk_library/demos/bitmaps/grey.25 -fill $blue -tags item
98:
99: $c create text 15c 8.2c -text Ovals -anchor n
100: $c create oval 11c 9.5c 14c 12.5c -outline $red -width 3m -tags item
101: $c create oval 10.5c 13.5c 14.5c 15.5c -fill $green -tags item
102: $c create oval 16c 10c 19c 15c -outline {} \
103: -stipple @$tk_library/demos/bitmaps/grey.25 -fill $blue -tags item
104:
105: $c create text 25c 8.2c -text Text -anchor n
106: $c create rectangle 22.4c 8.9c 22.6c 9.1c
107: $c create text 22.5c 9c -anchor n -font $font1 -width 4c \
108: -text "A short string of text, word-wrapped, justified left, and anchored north (at the top). The rectangles show the anchor points for each piece of text." -tags item
109: $c create rectangle 25.4c 10.9c 25.6c 11.1c
110: $c create text 25.5c 11c -anchor w -font $font1 -fill $blue \
111: -text "Several lines,\n each centered\nindividually,\nand all anchored\nat the left edge." \
112: -justify center -tags item
113: $c create rectangle 24.9c 13.9c 25.1c 14.1c
114: $c create text 25c 14c -font $font2 -anchor c -fill $red \
115: -stipple @$tk_library/demos/bitmaps/grey.5 \
116: -text "Stippled characters" -tags item
117:
118: $c create text 5c 16.2c -text Arcs -anchor n
119: $c create arc 0.5c 17c 7c 20c -fill $green -outline black \
120: -start 45 -extent 270 -style pieslice -tags item
121: $c create arc 6.5c 17c 9.5c 20c -width 4m -style arc \
122: -fill $blue -start -135 -extent 270 \
123: -stipple @$tk_library/demos/bitmaps/grey.25 -tags item
124: $c create arc 0.5c 20c 9.5c 24c -width 4m -style pieslice \
125: -fill {} -outline $red -start 225 -extent -90 -tags item
126: $c create arc 5.5c 20.5c 9.5c 23.5c -width 4m -style chord \
127: -fill $blue -outline {} -start 45 -extent 270 -tags item
128:
129: $c create text 15c 16.2c -text Bitmaps -anchor n
130: $c create bitmap 13c 20c -bitmap @$tk_library/demos/bitmaps/face -tags item
131: $c create bitmap 17c 18.5c \
132: -bitmap @$tk_library/demos/bitmaps/noletters -tags item
133: $c create bitmap 17c 21.5c \
134: -bitmap @$tk_library/demos/bitmaps/letters -tags item
135:
136: $c create text 25c 16.2c -text Windows -anchor n
137: button $c.button -text "Press Me" -command "butPress $c $red"
138: $c create window 21c 18c -window $c.button -anchor nw -tags item
139: entry $c.entry -width 20 -relief sunken
140: $c.entry insert end "Edit this text"
141: $c create window 21c 21c -window $c.entry -anchor nw -tags item
142: scale $c.scale -from 0 -to 100 -length 6c -sliderlength .4c \
143: -width .5c -tickinterval 0
144: $c create window 28.5c 17.5c -window $c.scale -anchor n -tags item
145: $c create text 21c 17.9c -text Button: -anchor sw
146: $c create text 21c 20.9c -text Entry: -anchor sw
147: $c create text 28.5c 17.4c -text Scale: -anchor s
148:
149: # Set up event bindings for canvas:
150:
151: $c bind item <Any-Enter> "itemEnter $c"
152: $c bind item <Any-Leave> "itemLeave $c"
153: bind $c <2> "$c scan mark %x %y"
154: bind $c <B2-Motion> "$c scan dragto %x %y"
155: bind $c <3> "itemMark $c %x %y"
156: bind $c <B3-Motion> "itemStroke $c %x %y"
157: bind $c <Control-f> "itemsUnderArea $c"
158: bind $c <1> "itemStartDrag $c %x %y"
159: bind $c <B1-Motion> "itemDrag $c %x %y"
160: bind $w <Any-Enter> "focus $c"
161: }
162:
163: # Utility procedures for highlighting the item under the pointer:
164:
165: proc itemEnter {c} {
166: global restoreCmd
167:
168: if {[winfo screendepth $c] <= 4} {
169: set restoreCmd {}
170: return
171: }
172: set type [$c type current]
173: if {$type == "window"} {
174: set restoreCmd {}
175: return
176: }
177: if {$type == "bitmap"} {
178: set bg [lindex [$c itemconf current -background] 4]
179: set restoreCmd [list $c itemconfig current -background $bg]
180: $c itemconfig current -background SteelBlue2
181: return
182: }
183: set fill [lindex [$c itemconfig current -fill] 4]
184: if {(($type == "rectangle") || ($type == "oval") || ($type == "arc"))
185: && ($fill == "")} {
186: set outline [lindex [$c itemconfig current -outline] 4]
187: set restoreCmd "$c itemconfig current -outline $outline"
188: $c itemconfig current -outline SteelBlue2
189: } else {
190: set restoreCmd "$c itemconfig current -fill $fill"
191: $c itemconfig current -fill SteelBlue2
192: }
193: }
194:
195: proc itemLeave {c} {
196: global restoreCmd
197:
198: eval $restoreCmd
199: }
200:
201: # Utility procedures for stroking out a rectangle and printing what's
202: # underneath the rectangle's area.
203:
204: proc itemMark {c x y} {
205: global areaX1 areaY1
206: set areaX1 [$c canvasx $x]
207: set areaY1 [$c canvasy $y]
208: $c delete area
209: }
210:
211: proc itemStroke {c x y} {
212: global areaX1 areaY1 areaX2 areaY2
213: set x [$c canvasx $x]
214: set y [$c canvasy $y]
215: if {($areaX1 != $x) && ($areaY1 != $y)} {
216: $c delete area
217: $c addtag area withtag [$c create rect $areaX1 $areaY1 $x $y \
218: -outline black]
219: set areaX2 $x
220: set areaY2 $y
221: }
222: }
223:
224: proc itemsUnderArea {c} {
225: global areaX1 areaY1 areaX2 areaY2
226: set area [$c find withtag area]
227: set items ""
228: foreach i [$c find enclosed $areaX1 $areaY1 $areaX2 $areaY2] {
229: if {[lsearch [$c gettags $i] item] != -1} {
230: lappend items $i
231: }
232: }
233: puts stdout "Items enclosed by area: $items"
234: set items ""
235: foreach i [$c find overlapping $areaX1 $areaY1 $areaX2 $areaY2] {
236: if {[lsearch [$c gettags $i] item] != -1} {
237: lappend items $i
238: }
239: }
240: puts stdout "Items overlapping area: $items"
241: }
242:
243: set areaX1 0
244: set areaY1 0
245: set areaX2 0
246: set areaY2 0
247:
248: # Utility procedures to support dragging of items.
249:
250: proc itemStartDrag {c x y} {
251: global lastX lastY
252: set lastX [$c canvasx $x]
253: set lastY [$c canvasy $y]
254: }
255:
256: proc itemDrag {c x y} {
257: global lastX lastY
258: set x [$c canvasx $x]
259: set y [$c canvasy $y]
260: $c move current [expr $x-$lastX] [expr $y-$lastY]
261: set lastX $x
262: set lastY $y
263: }
264:
265: # Procedure that's invoked when the button embedded in the canvas
266: # is invoked.
267:
268: proc butPress {w color} {
269: set i [$w create text 25c 18.1c -text "Ouch!!" -fill $color -anchor n]
270: after 500 "$w delete $i"
271: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.