link(scope, elem) {
  this.elem = elem;
  setTimeout(() => {
    this.resizePanel();
    this.renderViewBox();
  }, 50);
}

resizePanel() {
  // set height and width of panel
  const width = this.elem.find('.panel-container')[0].offsetWidth;
  this.updateHeight(width * 0.33);
}

updateHeight(height = 500) {
    const rowHeight = GRID_CELL_HEIGHT + GRID_CELL_VMARGIN;
    this.panel.updateGridPos({
      ...this.panel.gridPos,
      h: Math.ceil(height / rowHeight)
    });
    this.dashboard.events.emit('row-expanded');
  }