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4 years ago
(function ($) {
// register namespace
$.extend(true, window, {
"Slick": {
"CellRangeSelector": CellRangeSelector
}
});
function CellRangeSelector(options) {
var _grid;
var _currentlySelectedRange;
var _canvas;
var _gridOptions;
var _$activeCanvas;
var _dragging;
var _decorator;
var _self = this;
var _handler = new Slick.EventHandler();
var _defaults = {
selectionCss: {
"border": "2px dashed blue"
}
};
// Frozen row & column variables
var _rowOffset;
var _columnOffset;
var _isRightCanvas;
var _isBottomCanvas;
// Scrollings
var _scrollTop = 0;
var _scrollLeft = 0;
function init(grid) {
options = $.extend(true, {}, _defaults, options);
_decorator = options.cellDecorator || new Slick.CellRangeDecorator(grid, options);
_grid = grid;
_canvas = _grid.getCanvasNode();
_gridOptions = _grid.getOptions();
_handler
.subscribe(_grid.onScroll, handleScroll)
.subscribe(_grid.onDragInit, handleDragInit)
.subscribe(_grid.onDragStart, handleDragStart)
.subscribe(_grid.onDrag, handleDrag)
.subscribe(_grid.onDragEnd, handleDragEnd);
}
function destroy() {
_handler.unsubscribeAll();
}
function getCellDecorator() {
return _decorator;
}
function handleScroll(e, args) {
_scrollTop = args.scrollTop;
_scrollLeft = args.scrollLeft;
}
function handleDragInit(e, dd) {
// Set the active canvas node because the decorator needs to append its
// box to the correct canvas
_$activeCanvas = $(_grid.getActiveCanvasNode(e));
var c = _$activeCanvas.offset();
_rowOffset = 0;
_columnOffset = 0;
_isBottomCanvas = _$activeCanvas.hasClass('grid-canvas-bottom');
if (_gridOptions.frozenRow > -1 && _isBottomCanvas) {
_rowOffset = (_gridOptions.frozenBottom) ? $('.grid-canvas-bottom').height() : $('.grid-canvas-top').height();
}
_isRightCanvas = _$activeCanvas.hasClass('grid-canvas-right');
if (_gridOptions.frozenColumn > -1 && _isRightCanvas) {
_columnOffset = $('.grid-canvas-left').width();
}
// prevent the grid from cancelling drag'n'drop by default
e.stopImmediatePropagation();
}
function handleDragStart(e, dd) {
var cell = _grid.getCellFromEvent(e);
if (_self.onBeforeCellRangeSelected.notify(cell) !== false) {
if (_grid.canCellBeSelected(cell.row, cell.cell)) {
_dragging = true;
e.stopImmediatePropagation();
}
}
if (!_dragging) {
return;
}
_grid.focus();
var startX = dd.startX - $(_canvas).offset().left;
if (_gridOptions.frozenColumn >= 0 && _isRightCanvas) {
startX += _scrollLeft;
}
var startY = dd.startY - $(_canvas).offset().top;
if (_gridOptions.frozenRow >= 0 && _isBottomCanvas) {
startY += _scrollTop;
}
var start = _grid.getCellFromPoint(startX, startY);
dd.range = { start: start, end: {} };
_currentlySelectedRange = dd.range;
return _decorator.show(new Slick.Range(start.row, start.cell));
}
function handleDrag(e, dd) {
if (!_dragging) {
return;
}
e.stopImmediatePropagation();
var end = _grid.getCellFromPoint(
e.pageX - _$activeCanvas.offset().left + _columnOffset,
e.pageY - _$activeCanvas.offset().top + _rowOffset
);
// ... frozen column(s),
if ( _gridOptions.frozenColumn >= 0 && (!_isRightCanvas && (end.cell > _gridOptions.frozenColumn)) || (_isRightCanvas && (end.cell <= _gridOptions.frozenColumn)) ) {
return;
}
// ... or frozen row(s)
if ( _gridOptions.frozenRow >= 0 && (!_isBottomCanvas && (end.row >= _gridOptions.frozenRow)) || (_isBottomCanvas && (end.row < _gridOptions.frozenRow)) ) {
return;
}
// ... or regular grid (without any frozen options)
if (!_grid.canCellBeSelected(end.row, end.cell)) {
return;
}
dd.range.end = end;
_decorator.show(new Slick.Range(dd.range.start.row, dd.range.start.cell, end.row, end.cell));
}
function handleDragEnd(e, dd) {
if (!_dragging) {
return;
}
_dragging = false;
e.stopImmediatePropagation();
_decorator.hide();
_self.onCellRangeSelected.notify({
range: new Slick.Range(
dd.range.start.row,
dd.range.start.cell,
dd.range.end.row,
dd.range.end.cell
)
});
}
function getCurrentRange() {
return _currentlySelectedRange;
}
$.extend(this, {
"init": init,
"destroy": destroy,
"getCellDecorator": getCellDecorator,
"getCurrentRange": getCurrentRange,
"onBeforeCellRangeSelected": new Slick.Event(),
"onCellRangeSelected": new Slick.Event()
});
}
})(jQuery);