dragmanager.lzx

<library>
    <script>
        // For swf10, DHTML debug (need a global slot for some reason)
        var dragmanager;
    </script>
    <node name="dragmanager"> 
        <!--- The view that's being dragged, or null if none. 
              @type lz.draggable
              @access public
              @keywords readonly
        -->
        <attribute name="dragging" value="null"/>
        <!--- @access private -->
        <event name="ondragging"/>
        <!--- Filtered list of droppable items when dragging 
              @access private 
        -->
        <attribute name="__dragviews" value="null"/>
        <!--- @access private -->
        <setter name="dragging" args="view:lz.draggable">
            
            // use the last view
            var target = view || this.dragging;
            this.dragging = view;
            if (target) {
                target.setAttribute('dragging', view);

                var targets;
                if (view) {
                    // reuse list of droptargets for when view == null
                    targets = this.__dragviews = this.__find(target);
                } else if (this.__dragviews) {
                    targets = this.__dragviews;
                    this.__dragviews = null;
                }

                if (targets.length) {
                    // activate/deactivate lz.Track group
                    var trackmethod = view ? 'activate' : 'deactivate';
                    //Debug.warn(trackmethod, target.destinationtypes)
                    lz.Track[trackmethod]('dragmanager_' + target.destinationtypes);

                    // send to all targets
                    for (var i = 0, l = targets.length; i < l; i++) {
                        targets[i].setAttribute('dragging', view);
                    }
//                } else {
//                    if ($debug) {
//                        Debug.warn('No droppable views found for destinationtypes %w in %w', target.destinationtypes, target);
//                    }
                }
            }
            if (this.ondragging.ready) {
                this.ondragging.sendEvent(view);
            }
            
        </setter>
        <!--- @access private -->
        <method name="__find" args="view" returns="Array">
            
            var views = this.__droppable,
                out = [],
                destinationtypes = view.destinationtypes;
            for (var i = 0, l = views.length; i < l; i++) {
                var dropview:lz.droppable = views[i];
                if (view.validDestination(dropview) && dropview['validSource'](view)) {
                    //Debug.warn('registering', destinationtypes, dropview, regcache)
                    lz.Track.register(dropview, 'dragmanager_' + destinationtypes);
                    out.push(dropview);
                }
            }
            //Debug.info('__find', view.destinationtypes, out);
            return out;
            
        </method>

        <!--- The view that's been dragged over, or null if none. 
              @type lz.droppable
              @access public
              @keywords readonly
        -->
        <attribute name="dragover" value="null"/>
        <!--- @access private -->
        <event name="ondragover"/>
        <!--- @access private -->
        <setter name="dragover" args="view:lz.droppable">
            
            // use the last view
            var target = view || this.dragover;
            this.dragover = view;
            if (target) {
                this.dragging.setAttribute('dragover', view != null ? target : null);
                target.setAttribute('dragover', view != null ? this.dragging : null);
            }
            //Debug.info('dragover setter', view, this.dragging, target);
            if (this.ondragover.ready) {
                this.ondragover.sendEvent(view);
            }
            
        </setter>

        <!--- List of droppable items 
              @access private 
        -->
        <attribute name="__droppable" value="[]"/>
        <!--- @access private -->
        <method name="__add" args="view:lz.droppable">
            if (view is lz.droppable) {
                this.__droppable.push(view);
                new lz.Delegate(this, '__remove', view, 'ondestroy')
            }
            //Debug.warn('__add', this.__droppable);
        </method>
        <!--- @access private -->
        <method name="__remove" args="view:lz.droppable">
            
            var views;
            if (view is lz.droppable) {
                views = this.__droppable;
                for (var i = 0, l = views.length; i < l; i++) {
                    if (views[i] === view) {
                        //Debug.info('found', views[i], view);
                        views.splice(i, 1);
                        break;
                    }
                }
            }
            //Debug.warn('__remove', view, this.__droppable);
            
        </method>
        
        <!--- @access private -->
        <method name="__dropEvent" args="droppable">
            
            //Debug.warn('__dropEvent', droppable, this.dragging);
            if (this.dragover) {
                this.setAttribute('dragover', null);
            }
            var dragging = this.dragging;
            if (dragging && dragging.ondrop && dragging.ondrop.ready) {
                dragging.ondrop.sendEvent(droppable);
            }
            if (droppable && droppable.ondrop && droppable.ondrop.ready) {
                droppable.ondrop.sendEvent(dragging);
            }
            
        </method>
    </node>
</library>
<!-- * X_LZ_COPYRIGHT_BEGIN ***************************************************
* Copyright 2010 Laszlo Systems, Inc.  All Rights Reserved.                   *
* Use is subject to license terms.                                            *
* X_LZ_COPYRIGHT_END ****************************************************** -->
<!-- @LZX_VERSION@                                                         -->