Function attachDragBehavior

src/traces/parcoords/axisbrush.js:336–353

(selection)

}

function attachDragBehavior(selection) {
    // There's some fiddling with pointer cursor styling so that the cursor preserves its shape while dragging a brush
    // even if the cursor strays from the interacting bar, which is bound to happen as bars are thin and the user
    // will inevitably leave the hotspot strip. In this regard, it does something similar to what the D3 brush would do.
    selection
        .on('mousemove', function(d) {
            d3.event.preventDefault();
            if(!d.parent.inBrushDrag) mousemove(this, d);
        })
        .on('mouseleave', function(d) {
            if(!d.parent.inBrushDrag) clearCursor();
        })
        .call(d3.behavior.drag()
            .on('dragstart', function(d) { dragstart(this, d); })
            .on('drag', function(d) { drag(this, d); })
            .on('dragend', function(d) { dragend(this, d); })
        );
}

function startAsc(a, b) { return a[0] - b[0]; }