This changeset adds the ability to drag and drop actions between contexts and ajaxomagically update the action's context in the backend. I've tested it in Firefox and Safari, but not on other browsers.

When you start dragging an action, the other contexts collapse to provide easier targets for dropping. After the drop, the contexts return to their previously states of collapsed/expanded.



git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@275 a4c988fc-2ded-0310-b66e-134b36920a42

tracks/app/controllers/todo_controller.rb

@@ -189,6 +189,23 @@ class TodoController < ApplicationController
 
     @saved = @item.save
   end
+  
+  def update_context
+    self.init
+    @item = check_user_return_item
+    context = Context.find(params['context_id']);
+    if @user == context.user
+      @original_item_context_id = @item.context_id
+      @item.context_id = context.id
+      @item.context = context
+      @saved = @item.save
+      render :action => 'update_action'
+    else
+      render :update do |page| 
+        page.replace_html "info", content_tag("div", "Error updating the context of the dragged item. Item and context user mis-match: #{@item.user.name} and #{@context.user.name}! - refresh the page to see them.", "class" => "warning")
+      end
+    end
+  end
 
   def deferred_update_action
     #self.init
@@ -289,7 +306,7 @@ class TodoController < ApplicationController
       end
     end
   end
-
+  
   protected
 
     def check_user_return_item

tracks/app/views/todo/update_action.rjs

@@ -1,11 +1,20 @@
 if @saved
+  item_container_id = "item-#{@item.id}-container"
+  logger.info("@item.context_id = #{@item.context_id}")
+  logger.info("@original_item_context.id = #{@original_item_context_id}")
   if @item.context_id == @original_item_context_id
-    page.replace_html "item-#{@item.id}-container", :partial => 'todo/item'
-    page.visual_effect :highlight, "item-#{@item.id}-container", :duration => 3
+    page.replace_html item_container_id, :partial => 'todo/item'
+    page.visual_effect :highlight, item_container_id, :duration => 3
   else
     page["item-#{@item.id}-container"].remove
+    page.call "todoItems.expandNextActionListingByContext", "c#{@item.context_id}items", true
     page.insert_html :bottom, "c#{@item.context_id}items", :partial => 'todo/item'
-    page.visual_effect :highlight, "item-#{@item.id}-container", :duration => 3
+    page.delay(0.5) do
+      page.call "todoItems.ensureContainerHeight", "c#{@original_item_context_id}items"
+      page.call "todoItems.ensureContainerHeight", "c#{@item.context_id}items"
+      page.call "todoItems.makeItemDraggable", item_container_id
+      page.visual_effect :highlight, item_container_id, :duration => 3
+    end
   end
 else
   page.hide "info"

tracks/public/javascripts/application.js

@@ -6,7 +6,11 @@ Ajax.Responders.register({
   onComplete: function() {
     if($('busy') && Ajax.activeRequestCount==0)
       Element.hide('busy');
-  }
+  },
+// uncomment the next three lines for easier debugging with FireBug
+//  onException: function(source, exception) {
+//    console.error(exception);
+//  }
 });
 
 /**

tracks/public/javascripts/todo-items.js

@@ -11,20 +11,42 @@ var todoItems = {
 
   addNextActionListingToggles: function()
   {
-    this.contextCollapseCookieManager = new CookieManager();
-    var toggleElems = document.getElementsByClassName('container_toggle');
-    toggleElems.each(function(toggleElem){
+    $$('.container_toggle').each(function(toggleElem){
       Event.observe(toggleElem, 'click', todoItems.toggleNextActionListing);
       toggleElem.onclick = function() {return false;}; //workaround for Event.stop problem with Safari 2.0.3. See http://particletree.com/notebook/eventstop/
+		});
+	  todoItems.setNextActionListingTogglesToCookiedState();
+  },
+  setNextActionListingTogglesToCookiedState: function()
+  {
+    contextCollapseCookieManager = new CookieManager();
+    $$('.container_toggle').each(function(toggleElem){
       containerElem = todoItems.findNearestParentByClassName(toggleElem, "container");
       collapsedCookie = contextCollapseCookieManager.getCookie(todoItems.buildCookieName(containerElem));
-      if (collapsedCookie)
+      itemsElem = todoItems.findItemsElem(toggleElem);
+      isExpanded = Element.visible(itemsElem);
+      if (collapsedCookie && isExpanded)
       {
-        itemsElem = todoItems.findItemsElem(toggleElem);
         todoItems.collapseNextActionListing(toggleElem, itemsElem);
+      }
+      else if (!collapsedCookie && !isExpanded)
+      {
+        todoItems.expandNextActionListing(toggleElem, itemsElem);
       }
 		});
   },
+  collapseAllNextActionListing: function(except)
+  {
+    $$('.container_toggle').each(function(toggleElem){
+      if (toggleElem != except)
+      itemsElem = todoItems.findItemsElem(toggleElem);
+      isExpanded = Element.visible(itemsElem);
+      if (isExpanded)
+      {
+        todoItems.collapseNextActionListing(toggleElem, itemsElem);
+      }
+    });
+  },
 
   ensureVisibleWithEffectAppear: function(elemId)
   {
@@ -58,31 +80,51 @@ var todoItems = {
 	   	contextCollapseCookieManager.clearCookie(todoItems.buildCookieName(containerElem))
     }
   },
-  
-  expandNextActionListing: function(toggleElem, itemsElem)
+  findToggleElemForContext : function(contextElem)
   {
-    Effect.BlindDown(itemsElem, { duration: 0.4 });
+    childElems = $A($(contextElem).getElementsByTagName('a'));
+    return childElems.detect(function(childElem) { return childElem.className == 'container_toggle' });
+  },
+  expandNextActionListing: function(toggleElem, itemsElem, skipAnimation)
+  {
+    itemsElem = $(itemsElem)
+    if (skipAnimation == true) {
+      itemsElem.style.display = 'block';
+    }
+    else
+    {
+      Effect.BlindDown(itemsElem, { duration: 0.4 });
+    }
     toggleElem.setAttribute('title', 'Collapse');
-    imgElem = todoItems.findFirstImgElementWithSrcContaining(toggleElem, 'expand.png');
+    imgElem = todoItems.findToggleImgElem(toggleElem);
   	imgElem.src = imgElem.src.replace('expand','collapse');
     imgElem.setAttribute('title','Collapse');
   },
-  
+  ensureContainerHeight: function(itemsElem)
+  {
+    itemsElem = $(itemsElem);
+    Element.setStyle(itemsElem, {height : ''});
+    Element.setStyle(itemsElem, {overflow : ''});
+  },
+  expandNextActionListingByContext: function(itemsElem, skipAnimation)
+  {
+    contextElem = todoItems.findNearestParentByClassName($(itemsElem), "context");
+    toggleElem = todoItems.findToggleElemForContext(contextElem);
+    todoItems.expandNextActionListing(toggleElem, itemsElem, skipAnimation);
+  },
   collapseNextActionListing: function(toggleElem, itemsElem)
   {
     Effect.BlindUp(itemsElem, { duration: 0.4});
     toggleElem.setAttribute('title', 'Expand');
-    imgElem = todoItems.findFirstImgElementWithSrcContaining(toggleElem, 'collapse.png');
+    imgElem = todoItems.findToggleImgElem(toggleElem);
    	imgElem.src = imgElem.src.replace('collapse','expand');
    	imgElem.setAttribute('title','Expand');
   },
-  
-  findFirstImgElementWithSrcContaining: function(searchRootElem, srcString)
+  findToggleImgElem: function(toggleElem)
   {
-    childImgElems = $A(searchRootElem.getElementsByTagName('img'));
-    return childImgElems.detect(function(childImgElem) { return childImgElem.src.indexOf(srcString) != -1 });
+    childImgElems = $A(toggleElem.getElementsByTagName('img'));
+    return childImgElems[0];
   },
-  
   buildCookieName: function(containerElem)
   {
    	tracks_login = contextCollapseCookieManager.getCookie('tracks_login');
@@ -110,6 +152,67 @@ var todoItems = {
   		return document.getElementsByClassName('toggle_target',containerElem)[0];
   	else
   		return null;
+  },
+  
+  addItemDragDrop: function()
+  {    
+    $$('.item-container').each(function(containerElem){
+      todoItems.makeItemDraggable(containerElem);
+    });
+    $$('.context').each(function(contextElem){
+      todoItems.makeContextDroppable(contextElem);
+    });
+  },
+  makeItemDraggable: function(itemContainerElem)
+  {
+    new Draggable($(itemContainerElem).id,
+    {
+	    handle:'description',
+		  starteffect:todoItems.startDraggingItem,
+		  endeffect:todoItems.stopDraggingItem,
+	    revert:true
+    });
+  },
+  makeContextDroppable: function(contextElem)
+  {
+	  Droppables.add($(contextElem).id,
+	  {
+		  accept:'item-container',
+		  hoverclass:'item-container-drop-target',
+		  onDrop: todoItems.itemDrop,
+		  zindex: 1000
+    });
+  },
+  startDraggingItem:function(draggable)
+  {
+    parentContainer = todoItems.findNearestParentByClassName(draggable, 'container');
+    draggable.parentContainer = parentContainer;
+    toggleElem = document.getElementsByClassName('container_toggle',parentContainer)[0];
+    todoItems.collapseAllNextActionListing(toggleElem);
+  },
+  stopDraggingItem:function(draggable)
+  {
+    todoItems.setNextActionListingTogglesToCookiedState();
+  },
+  
+  itemDrop:function(draggableElement, droppableElement) {
+    if (draggableElement.parentContainer == droppableElement) {
+      return; //same destination as original, nothing to be done
+    } 
+    itemElementId = draggableElement.id
+    todoId = draggableElement.id.match(/\d+/)[0];
+    contextId = droppableElement.id.match(/\d+/)[0];
+    Draggables.drags.each(function(drag) {
+      if (drag.element == draggableElement) {
+        drag.destroy();
+      }
+    })
+    new Ajax.Request('/todo/update_context', {
+      asynchronous:true,
+      evalScripts:true,
+      parameters:"id=" + todoId + "&context_id=" + contextId
+    })
   }
 }
 Event.observe(window, "load", todoItems.addNextActionListingToggles);
+Event.observe(window, "load", todoItems.addItemDragDrop);

tracks/public/javascripts/toggle_notes.js

@@ -1,13 +1,12 @@
 function toggleAll(className) {
-  var elems = document.getElementsByClassName(className);
-  for (var i = 0; i < elems.length; i++) {
-    if (elems[i].style.display == 'block') 
+  document.getElementsByClassName(className).each(function(elem){
+    if (elem.style.display == 'block') 
     {
-      elems[i].style.display = 'none';
+      elem.style.display = 'none';
     } 
     else
     {
-      elems[i].style.display = 'block';
+      elem.style.display = 'block';
     }
-  }
+  });
 }

tracks/public/stylesheets/standard.css

@@ -129,6 +129,7 @@ a.show_notes:hover {background-image: url(../images/notes_on.png); background-re
       opacity: .75;
       color: #eee;
       width: 100%;
+      z-index:1100;
       }
       
 #date {
@@ -202,7 +203,9 @@ h2 a:hover {
       padding:2px;
       clear: left;
       }
-
+.item-container-drop-target {
+      border:2px inset black;
+}
 .container a.icon {
       float: left;
       vertical-align: middle;