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(function ($) {
// register namespace
$.extend(true, window, {
"Slick": {
"CellSelectionModel": CellSelectionModel
}
});
function CellSelectionModel(options) {
var _grid;
var _canvas;
var _ranges = [];
var _self = this;
var _selector = new Slick.CellRangeSelector({
"selectionCss": {
"border": "2px solid black"
}
});
var _options;
var _defaults = {
selectActiveCell: true
};
function init(grid) {
_options = $.extend(true, {}, _defaults, options);
_grid = grid;
_canvas = _grid.getCanvasNode();
_grid.onActiveCellChanged.subscribe(handleActiveCellChange);
_grid.onKeyDown.subscribe(handleKeyDown);
grid.registerPlugin(_selector);
_selector.onCellRangeSelected.subscribe(handleCellRangeSelected);
_selector.onBeforeCellRangeSelected.subscribe(handleBeforeCellRangeSelected);
}
function destroy() {
_grid.onActiveCellChanged.unsubscribe(handleActiveCellChange);
_grid.onKeyDown.unsubscribe(handleKeyDown);
_selector.onCellRangeSelected.unsubscribe(handleCellRangeSelected);
_selector.onBeforeCellRangeSelected.unsubscribe(handleBeforeCellRangeSelected);
_grid.unregisterPlugin(_selector);
}
function removeInvalidRanges(ranges) {
var result = [];
for (var i = 0; i < ranges.length; i++) {
var r = ranges[i];
if (_grid.canCellBeSelected(r.fromRow, r.fromCell) && _grid.canCellBeSelected(r.toRow, r.toCell)) {
result.push(r);
}
}
return result;
}
function setSelectedRanges(ranges) {
_ranges = removeInvalidRanges(ranges);
_self.onSelectedRangesChanged.notify(_ranges);
}
function getSelectedRanges() {
return _ranges;
}
function handleBeforeCellRangeSelected(e, args) {
if (_grid.getEditorLock().isActive()) {
e.stopPropagation();
return false;
}
}
function handleCellRangeSelected(e, args) {
setSelectedRanges([args.range]);
}
function handleActiveCellChange(e, args) {
if (_options.selectActiveCell && args.row != null && args.cell != null) {
setSelectedRanges([new Slick.Range(args.row, args.cell)]);
}
}
function handleKeyDown(e) {
/***
* Кey codes
* 37 left
* 38 up
* 39 right
* 40 down
*/
var ranges, last;
var active = _grid.getActiveCell();
if ( active && e.shiftKey && !e.ctrlKey && !e.altKey &&
(e.which == 37 || e.which == 39 || e.which == 38 || e.which == 40) ) {
ranges = getSelectedRanges();
if (!ranges.length)
ranges.push(new Slick.Range(active.row, active.cell));
// keyboard can work with last range only
last = ranges.pop();
// can't handle selection out of active cell
if (!last.contains(active.row, active.cell))
last = new Slick.Range(active.row, active.cell);
var dRow = last.toRow - last.fromRow,
dCell = last.toCell - last.fromCell,
// walking direction
dirRow = active.row == last.fromRow ? 1 : -1,
dirCell = active.cell == last.fromCell ? 1 : -1;
if (e.which == 37) {
dCell -= dirCell;
} else if (e.which == 39) {
dCell += dirCell ;
} else if (e.which == 38) {
dRow -= dirRow;
} else if (e.which == 40) {
dRow += dirRow;
}
// define new selection range
var new_last = new Slick.Range(active.row, active.cell, active.row + dirRow*dRow, active.cell + dirCell*dCell);
if (removeInvalidRanges([new_last]).length) {
ranges.push(new_last);
var viewRow = dirRow > 0 ? new_last.toRow : new_last.fromRow;
var viewCell = dirCell > 0 ? new_last.toCell : new_last.fromCell;
_grid.scrollRowIntoView(viewRow);
_grid.scrollCellIntoView(viewRow, viewCell);
}
else
ranges.push(last);
setSelectedRanges(ranges);
e.preventDefault();
e.stopPropagation();
}
}
$.extend(this, {
"getSelectedRanges": getSelectedRanges,
"setSelectedRanges": setSelectedRanges,
"init": init,
"destroy": destroy,
"onSelectedRangesChanged": new Slick.Event()
});
}
})(jQuery);
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