1 files changed, 108 insertions, 0 deletions
diff --git a/demos/zoom.tcl b/demos/zoom.tcl
new file mode 100644
index 0000000..038848e
--- /dev/null
+++ b/demos/zoom.tcl
@@ -0,0 +1,108 @@
+# these simple samples have been developped by C. Mertz mertz@cena.fr in perl
+# tcl version by Jean-Paul Imbert imbert@cena.fr
+
+
+if {![info exists zincDemo]} {
+    error "This script should be run from the zinc-widget demo."
+}
+
+set w .zoom
+catch {destroy $w}
+toplevel $w
+wm title $w "Zinc Zoom Demonstration"
+wm iconname $w Zoom
+
+set defaultfont "-adobe-helvetica-bold-r-normal-*-120-*-*-*-*-*-*"
+
+frame $w.buttons
+pack $w.buttons -side bottom -fill x -pady 2m
+button $w.buttons.dismiss -text Dismiss -command "destroy $w"
+button $w.buttons.code -text "See Code" -command "showCode $w"
+pack $w.buttons.dismiss $w.buttons.code -side left -expand 1
+
+
+###########################################
+# Text zone
+###########################################
+
+text $w.text -relief sunken -borderwidth 2 -height 4
+pack $w.text -expand yes -fill both
+
+$w.text insert end "This toy-appli shows zoom actions on waypoint and curve items.\nThe following operations are possible:\n Click - to zoom out\n Click + to zoom in"
+
+###########################################
+# Zinc
+###########################################
+set zinc_width 600
+set zinc_height 500
+zinc $w.zinc -width $zinc_width -height $zinc_height -font 10x20 -borderwidth 3 -relief sunken
+pack $w.zinc
+
+###########################################
+# Waypoints and sector
+###########################################
+set wp_group [$w.zinc add group 1 -visible 1]
+
+set p1 {200 100}
+set wp1 [$w.zinc add waypoint $wp_group 1 -position $p1 -connectioncolor green -symbolcolor blue -labelformat {x20x18+0+0} -leaderwidth 0 -labeldx -20]
+
+$w.zinc itemconfigure $wp1 0 -text DO
+
+set p2 {300 150}
+set wp2 [$w.zinc add waypoint $wp_group 1 -position $p2 -connecteditem $wp1 -connectioncolor blue -symbolcolor blue -labelformat {x20x18+0+0} -leaderwidth 0 -labeldx -20]
+
+$w.zinc itemconfigure $wp2 0 -text RE
+
+set p3 {400 50}
+set wp3 [$w.zinc add waypoint $wp_group 2 -position $p3 -connecteditem $wp2 -connectioncolor blue -symbolcolor blue -labelformat {x20x18+0+0} -leaderwidth 0 -labeldx 20 -labeldy +10]
+
+$w.zinc itemconfigure $wp3 0 -text MI
+
+set p4 {350 450}
+set wp4 [$w.zinc add waypoint $wp_group 2 -position $p4 -connecteditem $wp2 -connectioncolor blue -symbolcolor blue -labelformat {x20x18+0+0} -leaderwidth 0 -labeldx -15]
+
+$w.zinc itemconfigure $wp4 0 -text FA
+
+set p5 {300 250}
+set wp5 [$w.zinc add waypoint $wp_group 2 -position $p5 -connectioncolor blue -symbolcolor blue -labelformat {x20x18+0+0} -leaderwidth 0 -labeldx -15]
+
+$w.zinc itemconfigure $wp5 0 -text SOL
+
+set p6 {170 240}
+set wp6 [$w.zinc add waypoint $wp_group 2 -position $p6 -connecteditem $wp5 -connectioncolor blue -symbolcolor blue -labelformat {x20x18+0+0} -leaderwidth 0 -labeldx -20]
+
+$w.zinc itemconfigure $wp6 0 -text LA
+
+set p7 {550 200}
+set wp7 [$w.zinc add waypoint $wp_group 2 -position $p7 -connecteditem $wp5 -connectioncolor blue -symbolcolor blue -labelformat {x20x18+0+0} -leaderwidth 0 -labeldx 20]
+
+$w.zinc itemconfigure $wp7 0 -text SI
+
+set sector [$w.zinc add curve $wp_group {300 0 400 50 500 100 550 200 550 400 350 450 170 240 200 100 300 0}]
+
+###################################################
+# control panel
+###################################################
+frame $w.rc
+pack $w.rc
+
+#the reference of the scale function is top-left corner of the zinc object
+#so we first translate the group to zoom in order to put its center on top-left corner
+#change the scale of the group
+#translate the group to put it back at the center of the zinc object 
+
+
+button $w.rc.minus -width 2 -height 2 -text - -command {
+    $w.zinc translate $wp_group [expr -$zinc_width/2] [expr -$zinc_height/2]
+    $w.zinc scale $wp_group 0.8 0.8
+    $w.zinc translate $wp_group [expr $zinc_width/2] [expr $zinc_height/2]
+}
+pack $w.rc.minus -side left
+
+button $w.rc.plus -width 2 -height 2 -text + -command {
+    $w.zinc translate $wp_group [expr -$zinc_width/2] [expr -$zinc_height/2]
+    $w.zinc scale $wp_group 1.2 1.2
+    $w.zinc translate $wp_group [expr $zinc_width/2] [expr $zinc_height/2]
+}
+pack $w.rc.plus -side right
+