1 files changed, 54 insertions, 0 deletions
diff --git a/test/lua/rubberband.wlua b/test/lua/rubberband.wlua
new file mode 100644
index 0000000..595373a
--- /dev/null
+++ b/test/lua/rubberband.wlua
@@ -0,0 +1,54 @@
+require("iupcdaux") -- utility module used in some samples
+
+dlg = iupcdaux.new_dialog(w, h)
+cnv = dlg[1]     -- retrieve the IUP canvas
+
+
+function cnv:button_cb(button,pressed,x,y,r)
+  canvas = self.canvas     -- retrieve the CD canvas from the IUP attribute
+
+  -- start drag if button1 is pressed
+  if button ==iup.BUTTON1 and pressed == 1 then
+    y = canvas:UpdateYAxis(y)
+
+    -- prepare for XOR
+    canvas:Foreground(cd.WHITE)
+    canvas:WriteMode(cd.XOR)
+
+    xstart = x
+    ystart = y
+    drag = 1
+    first = 1
+  else
+    if (drag == 1) then
+      drag = 0
+      canvas:Rect(xstart,xend,ystart,yend)
+    end
+  end
+end
+
+
+function cnv:motion_cb(x,y,r)
+  canvas = self.canvas     -- retrieve the CD canvas from the IUP attribute
+
+  if (drag == 1) then
+    y = canvas:UpdateYAxis(y)
+
+    if (first == 1) then
+      first = 0
+    else
+      canvas:Rect(xstart,xend,ystart,yend)
+    end
+
+    canvas:Rect(xstart,x,ystart,y)
+
+    xend = x
+    yend = y
+  end
+end
+
+first = 1
+drag = 0
+
+dlg:show()
+iup.MainLoop()