[Twisted-Python] InputImage, ImageHandler -- Woven [PATCH]

[Jonathan Lange]

A widget and an InputHandler to better support <input type="image" ../>
in Woven. I'm not too happy with the Widget, as it requires the src=""
to be set in the template. 

But, FWIW, here's the patch.

pax et amor,
jml


Index: twisted/web/woven/input.py
===================================================================
RCS file: /cvs/Twisted/twisted/web/woven/input.py,v
retrieving revision 1.4
diff -u -r1.4 input.py
--- twisted/web/woven/input.py  28 Sep 2002 03:45:45 -0000      1.4
+++ twisted/web/woven/input.py  28 Sep 2002 06:00:05 -0000
@@ -174,6 +174,30 @@

 ListHandler = List

+class ImageHandler(InputHandler):
+    def getInput(self, request):
+        x, y = (request.args.get(self.submodel + '.x', None),
+                request.args.get(self.submodel + '.y', None))
+        if(x != None and y != None):
+            return x[0], y[0]
+        else:
+            return None
+
+    def check(self, request, data):
+        if data is None: return None
+        if len(data) != 2: return ()
+        try:
+            int(data[0])
+            int(data[1])
+            return 1
+        except (TypeError, ValueError):
+            return 0
+
+    def handleInvalid(self, request, data):
+        if data is not None:
+            self.view.setError(request, "%s is not a valid coordinate." % str(data))
+
+
 class NewObject(SingleValue):
     """
     Check to see if the name the user entered is valid.
Index: twisted/web/woven/widgets.py
===================================================================
RCS file: /cvs/Twisted/twisted/web/woven/widgets.py,v
retrieving revision 1.15
diff -u -r1.15 widgets.py
--- twisted/web/woven/widgets.py        28 Sep 2002 03:45:45 -0000      1.15
+++ twisted/web/woven/widgets.py        28 Sep 2002 06:00:07 -0000
@@ -369,6 +369,12 @@
         self.add(Text(self.getData()))
         return Input.generateDOM(self, request, node)

+class InputImage(Input):
+    def initialize(self):
+        self['type'] = 'image'
+    def generateDOM(self, request, node):
+        return Widget.generateDOM(self, request, node)
+
 class Anchor(Widget):
     tagName = 'a'
     def initialize(self):