With the following code (shortend):
--------------------------------------------------------------------------
var EditGrid = function (base_url, target_id) {
bindMethods(this);
this.base_url = base_url;
this.target_id = target_id;
this.editing = false;
this.direction = 6; //forward, see your numpad
this.editcell = null;
this.render();
}
EditGrid.prototype = {
render : function(params) {
params = params || {};
params = eval(params);
params['tg_random'] = new Date().getTime();
params['tg_format'] = "json";
var d = loadJSONDoc(this.base_url + '/get_data', params);
d.addCallback(this.createGrid);
return d;
},
createGrid : function(response) {
var grid = Widget.editgrid.render(this.target_id, response);
swapDOM(this.target_id, grid);
connect(window,'onkeydown',this.handleKey);
},
editCell : function(e) {
[...]
},
handleKey : function(e) {
[...]
if(e.key()['string'] == 'KEY_ESCAPE')
{
this.abort()
e.stop()
}
[...]
},
abort : function(e){
var editcell = this.editcell;
if(!this.editing) return;
swapDOM(editcell.firstChild,document.createTextNode(this.original));
this.editing = false;
this.original = null;
this.editcell = null;
if(e)e.stop();
}
[etc...]
}
-----------------------------------------------------------------------------
I have the following problem: the 'this' variable is overwritten by
the EditGrid function every time one of its methods is called.
Example: editCell is called on onclick on a tablecell, it thereby sets
this.editcell to the target cell, and this.editing to true. But when
the handleKey method is called by a onkeydown, this.editing is set to
false, and this.editcell to null, like the values they had initially.
What am I doing wrong?
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