Ember.js可拖放和可拖放jqueryUI /本地拖放混合

Question

我需要創建具有拖放和排序功能的項目。所以一個物品可以被拖入另一個物品。

我已經看到了一些解決方案，通過mixin進行拖動，並使用該mixin創建可拖動的視圖，然後通過可拖放的mixin創建可拖放的視圖。

但我需要每個項目/視圖具有可拖動，可拖拽和可排序的功能。

請誰能告訴我通過mixins或subclassing或...做到這一點的最好方法？

也可以創建一個jqueryUi混搭作爲基礎混合，然後在創建可拖動，可拖放和可排序混合時使用該混合？這可能嗎 ？

最好是使用jqueryUI或html5拖放api或其他東西？

感謝您的幫助 裏克

Answer 1

不知道，如果你看到了卡茨here的代碼，但我用這個做一個查看：投擲的，可拖動，......或任何其他互動的jQuery支持UI。所以你定義一個基礎的Mixin，你將在所有的jQuery UI交互混入使用：

// Create a new mixin for jQuery UI widgets using the new SproutCore 2.0 
// mixin syntax. 
JQ.Base = Ember.Mixin.create({ 
    // When SproutCore creates the view's DOM element, it will call this 
    // method. 
    didInsertElement: function() { 
    this._super(); 

    // Make jQuery UI options available as SproutCore properties 
    var options = this._gatherOptions(); 

    // Make sure that jQuery UI events trigger methods on this view. 
    this._gatherEvents(options); 

    // Create a new instance of the jQuery UI widget based on its `uiType` 
    // and the current element. 
    var ui = jQuery.ui[this.get('uiType')](options, this.get('element')); 

    // Save off the instance of the jQuery UI widget as the `ui` property 
    // on this SproutCore view. 
    this.set('ui', ui); 


    }, 

    // When SproutCore tears down the view's DOM element, it will call 
    // this method. 
    willDestroyElement: function() { 
    var ui = this.get('ui'); 

    if (ui) { 
     // Tear down any observers that were created to make jQuery UI 
     // options available as SproutCore properties. 
     var observers = this._observers; 
     for (var prop in observers) { 
     if (observers.hasOwnProperty(prop)) { 
      this.removeObserver(prop, observers[prop]); 
     } 
     } 
     ui._destroy(); 
    } 
    }, 

    // Each jQuery UI widget has a series of options that can be configured. 
    // For instance, to disable a button, you call 
    // `button.options('disabled', true)` in jQuery UI. To make this compatible 
    // with SproutCore bindings, any time the SproutCore property for a 
    // given jQuery UI option changes, we update the jQuery UI widget. 
    _gatherOptions: function() { 
    var uiOptions = this.get('uiOptions'), options = {}; 

    // The view can specify a list of jQuery UI options that should be treated 
    // as SproutCore properties. 
    uiOptions.forEach(function(key) { 
     options[key] = this.get(key); 

     // Set up an observer on the SproutCore property. When it changes, 
     // call jQuery UI's `setOption` method to reflect the property onto 
     // the jQuery UI widget. 
     var observer = function() { 
     var value = this.get(key); 
     this.get('ui')._setOption(key, value); 
     }; 

     this.addObserver(key, observer); 

     // Insert the observer in a Hash so we can remove it later. 
     this._observers = this._observers || {}; 
     this._observers[key] = observer; 
    }, this); 

    return options; 
    }, 

    // Each jQuery UI widget has a number of custom events that they can 
    // trigger. For instance, the progressbar widget triggers a `complete` 
    // event when the progress bar finishes. Make these events behave like 
    // normal SproutCore events. For instance, a subclass of JQ.ProgressBar 
    // could implement the `complete` method to be notified when the jQuery 
    // UI widget triggered the event. 
    _gatherEvents: function(options) { 
    var uiEvents = this.get('uiEvents') || [], self = this; 

    uiEvents.forEach(function(event) { 
     var callback = self[event]; 

     if (callback) { 
     // You can register a handler for a jQuery UI event by passing 
     // it in along with the creation options. Update the options hash 
     // to include any event callbacks. 
     options[event] = function(event, ui) { callback.call(self, event, ui); }; 
     } 
    }); 
    } 
}); 

然後定義可拖動的Mixin：

JQ.Draggable = Ember.Mixin.create(JQ.Base, { 
    uiType: 'draggable', 
    uiOptions: ['disabled', 'addClasses', 'appendTo', 'axis', 'cancel', 'connectToSortable', 'containment', 'cursor', 
       'delay', 'distance', 'grid', 'handle', 'snap', 'snapMode', 'stack'], 
    uiEvents: ['create', 'start', 'drag', 'stop'] 

}); 

可調整大小的Mixin：

JQ.Resizable = Ember.Mixin.create(JQ.Base, { 
    uiType: 'resizable', 
    uiOptions: ['disabled', 'alsoResize', 'animate', 'animateDuration', 'animateEasing', 'aspectRatio', 'autoHide', 'cancel', 
       'containment', 'delay', 'distance', 'ghost', 'grid', 'handles', 'helper', 'maxHeight', 'maxWidth', 'minHeight', 
       'minWidth'], 
    uiEvents: ['create', 'start', 'resize', 'stop'] 
}); 

基本上，對於每個用戶界面交互，您要定義uiType（可拖動，可拖放，可排序等），交互的uiOptions（由mixin觀察）和uiEvents您想要在視圖中實現的交互。

通過在View中包含JQ.Draggable和JQ.Droppable，它會自動變爲可拖動和可拖拽+，您可以在視圖中更改其選項並在UI插件上反映這些更改。 this.set('delay', 900)，並在視圖中實現插件事件，例如drag: function(){ /* do something when dragging*\ }）。