44 lines
832 B
JavaScript
44 lines
832 B
JavaScript
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function CoordinateGrid(buildFunc) {
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var t = this;
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var rows;
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var cols;
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t.build = function() {
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rows = [];
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cols = [];
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buildFunc(rows, cols);
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};
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t.cell = function(x, y) {
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var rowCnt = rows.length;
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var colCnt = cols.length;
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var i, r=-1, c=-1;
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for (i=0; i<rowCnt; i++) {
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if (y >= rows[i][0] && y < rows[i][1]) {
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r = i;
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break;
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}
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}
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for (i=0; i<colCnt; i++) {
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if (x >= cols[i][0] && x < cols[i][1]) {
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c = i;
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break;
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}
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}
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return (r>=0 && c>=0) ? { row:r, col:c } : null;
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};
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t.rect = function(row0, col0, row1, col1, originElement) { // row1,col1 is inclusive
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var origin = originElement.offset();
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return {
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top: rows[row0][0] - origin.top,
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left: cols[col0][0] - origin.left,
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width: cols[col1][1] - cols[col0][0],
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height: rows[row1][1] - rows[row0][0]
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};
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};
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}
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