Function moveVertexController

src/components/shapes/display_outlines.js:115–168

(dx, dy)

    }

    function moveVertexController(dx, dy) {
        if(!polygons.length) return;

        var x0 = copyPolygons[indexI][indexJ][1];
        var y0 = copyPolygons[indexI][indexJ][2];

        var cell = polygons[indexI];
        var len = cell.length;
        if(pointsOnRectangle(cell)) {
            var _dx = dx;
            var _dy = dy;
            if(dragOptions.isActiveSelection) {
                // handle an edge contoller for rect selections
                var nextPoint = getNextPoint(cell, indexJ);
                if(nextPoint[1] === cell[indexJ][1]) { // a vertical edge
                    _dy = 0;
                } else { // a horizontal edge
                    _dx = 0;
                }
            }

            for(var q = 0; q < len; q++) {
                if(q === indexJ) continue;

                // move other corners of rectangle
                var pos = cell[q];

                if(pos[1] === cell[indexJ][1]) {
                    pos[1] = x0 + _dx;
                }

                if(pos[2] === cell[indexJ][2]) {
                    pos[2] = y0 + _dy;
                }
            }
            // move the corner
            cell[indexJ][1] = x0 + _dx;
            cell[indexJ][2] = y0 + _dy;

            if(!pointsOnRectangle(cell)) {
                // reject result to rectangles with ensure areas
                for(var j = 0; j < len; j++) {
                    for(var k = 0; k < cell[j].length; k++) {
                        cell[j][k] = copyPolygons[indexI][j][k];
                    }
                }
            }
        } else { // other polylines
            cell[indexJ][1] = x0 + dx;
            cell[indexJ][2] = y0 + dy;
        }

        redraw();
    }

    function endDragVertexController() {
        update();