add arrowheads to cords to show direction of message flow

svn path=/trunk/scripts/guiplugins/simple_examples/; revision=15221

1 files changed, 16 insertions, 0 deletions

diff --git a/cordarrows-plugin.tcl b/cordarrows-plugin.tcl
new file mode 100644
index 0000000..abf71ef
--- /dev/null
+++ b/cordarrows-plugin.tcl
@@ -0,0 +1,16 @@
+# this plugin adds arrowheads to the ends of cords when in editmode in
+# order to show the direction that the messages are flowing
+
+proc add_arrows_to_cords {mytoplevel} {
+    if { ! [winfo exists $mytoplevel] } {return}
+    if {$mytoplevel eq ".pdwindow"} {return}
+    set tkcanvas [tkcanvas_name $mytoplevel]
+    if {$::editmode($mytoplevel) == 1} {
+        $tkcanvas itemconfigure cord -arrow last
+    } else {
+        $tkcanvas itemconfigure cord -arrow none
+    }
+}
+
+
+bind all <<EditMode>> {+add_arrows_to_cords %W}