Gets the left x pixel coordinate of the box.
In some cases, the left x coordinate of a box may be dynamically determined. An example is the left x coordinate of an LegendBox
with alignment set to Center
. To determine the left x coordinate, the size of the box must be known first. For these cases, the left x coordinate is undefined until the legend box or the entire chart has been laid out (using BaseChart.layout
), or the chart image has been drawn (eg. using BaseChart.makeChart
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