public void selectRenderables(DrawContext dc, Sector vs) {
// Select our renderables
if (this.gridElements == null) createRenderables();
int gridStep = (int) this.size / 10;
boolean drawMetricLabels = getSizeInPixels(dc) > MIN_CELL_SIZE_PIXELS * 4 * 1.7;
String graticuleType = getTypeFor(gridStep);
for (GridElement ge : this.gridElements) {
if (ge.isInView(dc, vs)) {
if (drawMetricLabels)
metricScaleSupport.computeMetricScaleExtremes(
this.UTMZone, this.hemisphere, ge, this.size);
addRenderable(ge.renderable, graticuleType);
}
}
if (getSizeInPixels(dc) <= MIN_CELL_SIZE_PIXELS * 4 * 2) return;
// Select sub grids renderables
if (this.subGrids == null) createSubGrids();
for (SquareGrid sg : this.subGrids) {
if (sg.isInView(dc)) {
sg.selectRenderables(dc, vs);
} else sg.clearRenderables();
}
}
public void clearRenderables() {
if (this.gridElements != null) {
this.gridElements.clear();
this.gridElements = null;
}
if (this.subGrids != null) {
for (SquareGrid sg : this.subGrids) {
sg.clearRenderables();
}
this.subGrids.clear();
this.subGrids = null;
}
}
public void createSubGrids() {
this.subGrids = new ArrayList<SquareGrid>();
double gridStep = this.size / 10;
for (int i = 0; i < 10; i++) {
double easting = this.SWEasting + gridStep * i;
for (int j = 0; j < 10; j++) {
double northing = this.SWNorthing + gridStep * j;
SquareGrid sg =
new SquareGrid(
this.UTMZone, this.hemisphere, this.UTMZoneSector, easting, northing, gridStep);
if (!sg.isOutsideGridZone()) this.subGrids.add(sg);
}
}
}