Start of the dialog to specify the watermark placement. For convience, using the imagemagik nomicalture regarding watermark locations (east, west, center, etc.)

You can drag the watermark around but it doesn't stay in place.
Need to figure out how to resize the dialog box

and all of the supporting javascript

modules/watermark/controllers/watermark.php

@@ -22,13 +22,12 @@ class Watermark_Controller extends Controller {
     $form = watermark::get_watermark_form();
     if ($form->validate()) {
         $file = $_POST["file"];
-        
-        // Format of the file is config["upload.directory"]/uploadfile-hash-filename.
-        $index = strrpos($file, "-");
-        $watermark_target = VARPATH . substr($file, strrpos($file, "-") + 1);
-        if (rename($file, $watermark_target)) {
-          module::set_var("watermark", "watermark_image_path", $watermark_target);
 
+        $pathinfo = pathinfo($file);
+        $watermark_target = $pathinfo["basename"];
+        if (copy($file, VARPATH . $watermark_target)) {
+          module::set_var("watermark", "watermark_image_path", $watermark_target);
+          unlink($file);
           $form->success = _("Watermark saved");
         } else {
           // @todo set and error message

modules/watermark/controllers/watermark_admin.php

@@ -0,0 +1,57 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class Watermark_admin_Controller extends Controller {
+  public function get_form($user_id) {
+    try {
+      // @todo check for admin user
+
+      $path = module::get_var("watermark", "watermark_image_path");
+      $view = new View("watermark_position.html");
+
+      if (empty($path)) {
+        // @todo need to do something when there is no watermark
+      }
+
+      $photo = ORM::factory("item")
+        ->where("type", "photo")
+        ->find_all(1, 0)->current();
+
+      // @todo determine what to do if water mark is not set
+      // @todo caclulate the view sizes
+      $view->sample_image =  $photo->resize_url();
+      $scaleWidth = $photo->resize_width / $photo->width;
+      $scaleHeight = $photo->resize_height / $photo->height;
+      $scale = $scaleHeight < $scaleWidth ? $scaleHeight : $scaleWidth;
+
+      $imageinfo = getimagesize(VARPATH . $path);
+
+      $view->watermark_height = $imageinfo[1] * $scale;
+      $view->watermark_width = $imageinfo[0] * $scale;
+      $view->watermark_image = url::abs_file("var/" . $path);
+
+      $current_position = module::get_var("watermark", "watermark_position");
+      $view->watermark_position_form = watermark::get_watermark_postion_form($current_position);
+
+      print $view;
+    } catch (Exception $e) {
+      print $e;
+    }
+  }
+}

modules/watermark/helpers/watermark.php

@@ -26,4 +26,19 @@ class watermark_Core {
     $group->submit(_("Upload"));
     return $form;
   }
+
+  public static function get_watermark_postion_form($position="southeast") {
+    $form = new Forge("admin/watermark/position", "", "post");
+    $group = $form->group("watermark_position")->label(_("Update Position"));
+    $group->hidden("original_position")->value($position);
+    $group->dropdown("new_position")->label(_("Watermark Position"))
+      ->options(array("northwest",  "north",  "northeast",
+                      "west",       "center", "east",
+                      "southwest",  "south",  "southeast"))
+      ->selected("8");
+
+    $group->submit(_("Update"));
+    $group->submit(_("Reset"));
+    return $form;
+  }
 }

modules/watermark/helpers/watermark_installer.php

@@ -24,7 +24,7 @@ class watermark_installer {
     if ($version == 0) {
       module::set_version("watermark", 1);
       module::set_var("watermark", "watermark_image_path", "");
-      module::set_var("watermark", "watermark_position", serialize(array()));
+      module::set_var("watermark", "watermark_position", "southeast");
     }
   }
 

modules/watermark/helpers/watermark_menu.php

@@ -0,0 +1,34 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class watermark_menu_Core {
+  // @todo this needs to get on the admin page at some point
+
+  public static function site_navigation($menu, $theme) {
+    $user = user::active();
+    if ($user->admin) {
+       Kohana::log("debug", print_r($menu, 1));
+      $menu->get("admin_menu")->append(
+        Menu::Factory("dialog")
+        ->id("watermark_position")
+        ->label(_("Set Watermark Position"))
+        ->url(url::site("admin/watermark/get_form/$user->id")));
+    }
+  }
+}

modules/watermark/views/watermark_position.html.php

@@ -1,7 +1,16 @@
 <? defined("SYSPATH") or die("No direct script access."); ?>
 <div id="gWatermarkAdmin">
   <div id="gTargetImage" class="droppable">
+    <img src="<?= $sample_image ?>"></img>
   </div>
-  <div id="gWaterMark" class="draggable">
+  <div id="gWaterMark">
+    <!--  This style and div is only temporary -->
+    <div style="background-color: #cccccc;">
+    <img src="<?= $watermark_image ?>" class="draggable"
+        width="<?= $watermark_width ?>"  height="<?= $watermark_height ?>" />
+    </div>
+  </div>
+  <div id="gWatermarkPostionForm" >
+  <?= $watermark_position_form ?>
   </div>
 </div>