/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
Ext.onReady(function() {

    var patients = [{
        insuranceCode: '11111',
        name: 'Fred Bloggs',
        address: 'Main Street',
        telephone: '555 1234 123'
    }, {
        insuranceCode: '22222',
        name: 'Fred West',
        address: 'Cromwell Street',
        telephone: '666 666 666'
    }, {
        insuranceCode: '33333',
        name: 'Fred Mercury',
        address: 'Over The Rainbow',
        telephone: '555 321 0987'
    }, {
        insuranceCode: '44444',
        name: 'Fred Forsyth',
        address: 'Blimp Street',
        telephone: '555 111 2222'
    }, {
        insuranceCode: '55555',
        name: 'Fred Douglass',
        address: 'Talbot County, Maryland',
        telephone: 'N/A'
    }];

    var PatientRecord = Ext.data.Record.create([{
        name: 'name'
    }, {
        name: 'address'
    }, {
        name: 'telephone'
    }]);

    var patientStore = new Ext.data.Store({
        data: patients,
        reader: new Ext.data.JsonReader({
            id: 'insuranceCode'
        }, PatientRecord)
    });

    var hospitals = [{
        code: 'AAAAA',
        name: 'Saint Thomas',
        address: 'Westminster Bridge Road, SE1 7EH',
        telephone: '020 7188 7188'
    }, {
        code: 'BBBBB',
        name: 'Queen\'s Medical Centre',
        address: 'Derby Road, NG7 2UH',
        telephone: '0115 924 9924'
    }, {
        code: 'CCCCC',
        name: 'Saint Bartholomew',
        address: 'West Smithfield, EC1A 7BE',
        telephone: '020 7377 7000'
    }, {
        code: 'DDDDD',
        name: 'Royal London',
        address: 'Whitechapel, E1 1BB',
        telephone: '020 7377 7000'
    }];
    
    var HospitalRecord = Ext.data.Record.create([{
        name: 'name'
    }, {
        name: 'address'
    }, {
        name: 'telephone'
    }]);

    var hospitalStore = new Ext.data.Store({
        data: hospitals,
        reader: new Ext.data.JsonReader({
            id: 'code'
        }, HospitalRecord)
    });
    
    var patientView = new Ext.DataView({
        cls: 'patient-view',
        tpl: '<tpl for=".">' +
                '<div class="patient-source"><table><tbody>' +
                    '<tr><td class="patient-label">Name</td><td class="patient-name">{name}</td></tr>' +
                    '<tr><td class="patient-label">Address</td><td class="patient-name">{address}</td></tr>' +
                    '<tr><td class="patient-label">Telephone</td><td class="patient-name">{telephone}</td></tr>' +
                '</tbody></table></div>' +
             '</tpl>',
        itemSelector: 'div.patient-source',
        overClass: 'patient-over',
        selectedClass: 'patient-selected',
        singleSelect: true,
        store: patientStore,
        listeners: {
            render: initializePatientDragZone
        }
    });

    var helpWindow = new Ext.Window({
        title: 'Source code',
        width: 920,
        height: 500,
        closeAction: 'hide',
        bodyCfg: {tag: 'textarea', readonly: true},
        bodyStyle: {
            backgroundColor: 'white',
            margin: '0px',
            border: '0px none'
        },
        listeners: {
            render: function(w) {
                Ext.Ajax.request({
                    url: 'dragdropzones.js',
                    success: function(r) {
                        w.body.dom.value = r.responseText;
                    }
                });
            }
        }
    });

    var hospitalGrid = new Ext.grid.GridPanel({
        title: 'Hospitals',
        region: 'center',
        margins: '0 5 5 0',
        bbar: [{
            text: 'View Source',
            handler: function() {
                helpWindow.show();
            }
        }],
        columns: [{
            dataIndex: 'name',
            header: 'Name',
            width: 200
        }, {
            dataIndex: 'address',
            header: 'Address',
            width: 300
        }, {
            dataIndex: 'telephone',
            header: 'Telephone',
            width: 100
        }],
        viewConfig: {
            tpl: new Ext.XTemplate('<div class="hospital-target">Drop Patient Here</div>'),
            enableRowBody: true,
            getRowClass: function(rec, idx, p, store) {
                p.body = this.tpl.apply(rec.data);
            }
        },
        store: hospitalStore,
        listeners: {
            render: initializeHospitalDropZone
        }
    });

    new Ext.Viewport({
        layout: 'border',
        items: [{
            cls: 'app-header',
            region: 'north',
            height: 30,
            html: '<h1>Patient Hospital Assignment</h1>',
            margins: '5 5 5 5'
        }, {
            title: 'Patients',
            region: 'west',
            width: 300,
            margins: '0 5 5 5',
            items: patientView
        }, hospitalGrid ]
    });
});

/*
 * Here is where we "activate" the DataView.
 * We have decided that each node with the class "patient-source" encapsulates a single draggable
 * object.
 *
 * So we inject code into the DragZone which, when passed a mousedown event, interrogates
 * the event to see if it was within an element with the class "patient-source". If so, we
 * return non-null drag data.
 *
 * Returning non-null drag data indicates that the mousedown event has begun a dragging process.
 * The data must contain a property called "ddel" which is a DOM element which provides an image
 * of the data being dragged. The actual node clicked on is not dragged, a proxy element is dragged.
 * We can insert any other data into the data object, and this will be used by a cooperating DropZone
 * to perform the drop operation.
 */
function initializePatientDragZone(v) {
    v.dragZone = new Ext.dd.DragZone(v.getEl(), {

//      On receipt of a mousedown event, see if it is within a draggable element.
//      Return a drag data object if so. The data object can contain arbitrary application
//      data, but it should also contain a DOM element in the ddel property to provide
//      a proxy to drag.
        getDragData: function(e) {
            var sourceEl = e.getTarget(v.itemSelector, 10);
            if (sourceEl) {
                d = sourceEl.cloneNode(true);
                d.id = Ext.id();
                return v.dragData = {
                    sourceEl: sourceEl,
                    repairXY: Ext.fly(sourceEl).getXY(),
                    ddel: d,
                    patientData: v.getRecord(sourceEl).data
                }
            }
        },

//      Provide coordinates for the proxy to slide back to on failed drag.
//      This is the original XY coordinates of the draggable element.
        getRepairXY: function() {
            return this.dragData.repairXY;
        }
    });
}

/*
 * Here is where we "activate" the GridPanel.
 * We have decided that the element with class "hospital-target" is the element which can receieve
 * drop gestures. So we inject a method "getTargetFromEvent" into the DropZone. This is constantly called
 * while the mouse is moving over the DropZone, and it returns the target DOM element if it detects that
 * the mouse if over an element which can receieve drop gestures.
 *
 * Once the DropZone has been informed by getTargetFromEvent that it is over a target, it will then
 * call several "onNodeXXXX" methods at various points. These include:
 *
 * onNodeEnter
 * onNodeOut
 * onNodeOver
 * onNodeDrop
 *
 * We provide implementations of each of these to provide behaviour for these events.
 */
function initializeHospitalDropZone(g) {
    g.dropZone = new Ext.dd.DropZone(g.getView().scroller, {

//      If the mouse is over a target node, return that node. This is
//      provided as the "target" parameter in all "onNodeXXXX" node event handling functions
        getTargetFromEvent: function(e) {
            return e.getTarget('.hospital-target');
        },

//      On entry into a target node, highlight that node.
        onNodeEnter : function(target, dd, e, data){ 
            Ext.fly(target).addClass('hospital-target-hover');
        },

//      On exit from a target node, unhighlight that node.
        onNodeOut : function(target, dd, e, data){ 
            Ext.fly(target).removeClass('hospital-target-hover');
        },

//      While over a target node, return the default drop allowed class which
//      places a "tick" icon into the drag proxy.
        onNodeOver : function(target, dd, e, data){ 
            return Ext.dd.DropZone.prototype.dropAllowed;
        },

//      On node drop, we can interrogate the target node to find the underlying
//      application object that is the real target of the dragged data.
//      In this case, it is a Record in the GridPanel's Store.
//      We can use the data set up by the DragZone's getDragData method to read
//      any data we decided to attach.
        onNodeDrop : function(target, dd, e, data){
            var rowIndex = g.getView().findRowIndex(target);
            var h = g.getStore().getAt(rowIndex);
            var targetEl = Ext.get(target);
            targetEl.update(data.patientData.name+', '+targetEl.dom.innerHTML);
            Ext.Msg.alert('Drop gesture', 'Dropped patient ' + data.patientData.name +
                ' on hospital ' + h.data.name);
            return true;
        }
    });
}