source: trunk/calendar_new/js/drag_area.js @ 420

var agt=navigator.userAgent.toLowerCase();
var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));

function DragArea(){
        this.pressed = 0;
        this.resizing = 0;
        this.initEvent;
        this.endEvent;
        this.currentEvent;
}

DragArea.prototype.loadMouseDown = function(e) {
        var     _event  = is_ie ? window.event : e;
        var     _target = is_ie ? window.event.srcElement : e.target;
        var _button = is_ie ? _event.button : _event.which;
        
        if (typeof _event.preventDefault != 'undefined') {
                _event.preventDefault();
        }

        this.pressed = 1;       

        if(_button != 2 && _button != 3) {
                if(_target.id && _target.id.length == 12){
                        if (parseInt(_target.id) > 0)
                                this.initEvent = _target.id;
                }       
        }       
};

DragArea.prototype.loadMouseMove = function(e) {
        if(!this.pressed) {
                return true;
        }
        var id = is_ie ? window.event.srcElement.id : e.target.id;
        var colorCell = function (id,style){
                try {
                        document.getElementById(id).style.background = style;
                }
                catch(e)
                { document.style.background = "#000;"; };
        };

        var incHour = function (hour,op){
        if (op == '+')
                (hour%100 >= 30)?hour+=70:hour+=30;
        else
                (hour%100 == 30)?hour-=30:hour-=70;
        return hour;
        };

        if((parseInt(id) > 0) && (id.length == 12)){
                if (this.endEvent < this.initEvent)
                        if (id <= this.endEvent)
                                for (var hour = parseInt(this.initEvent); hour >= parseInt(id);hour=incHour(hour,'-')) 
                                        colorCell(hour,"#EEE;");
                        else
                                for (var hour = parseInt(id); hour >= parseInt(this.endEvent);hour=incHour(hour,'-')) 
                                        colorCell(hour,"");
                else
                        if (id < this.endEvent)
                                for (var hour = parseInt(id); hour <= parseInt(this.endEvent);hour=incHour(hour,'+'))
                                        colorCell(hour,"");
                        else
                                for (var hour = parseInt(this.initEvent); hour <= parseInt(id);hour=incHour(hour,'+'))
                                        colorCell(hour,"#EEE;");
                this.endEvent=id;
                return true;
        }
};

document.onmousemove = function(event) {_dragArea.loadMouseMove(event);};
document.onmousedown = function(event) {_dragArea.loadMouseDown(event);};
document.onmouseup = function(event) {_dragArea.loadMouseUp(event);};

DragArea.prototype.loadMouseUp = function(e) {
        this.pressed = 0;
        var _event  = is_ie ? window.event : e;
        var id = is_ie ? window.event.srcElement.id : e.target.id;
        var _button = is_ie ? _event.button : _event.which;
        
        if(_button != 2 && _button != 3) {
                if (this.resizing == 0){
                        if((parseInt(id) > 0) && (id.length == 12))
                                calendar.dialog();
                }else{
                        if (confirm(get_lang('Change the end of this event to %1',calendar.parseDate(id2timeStamp(id)))+' ('+id.substr(8,2)+':'+id.substr(10,2)+') ?')){
                                changeEvent(this.currentEvent,'edatetime',parseInt((id2timeStamp(id)+1800000)/1000));
                        }
                        for (var hour = parseInt(_dragArea.initEvent); hour <= parseInt(_dragArea.endEvent);(hour%100 == 30)?hour+=70:hour+=30)
                                document.getElementById(hour).style.background = "";
                        this.resizing = 0;
                }
        }
}

var _dragArea = new DragArea();