private void zoom(float scale) {
final double domainSpan = maxXY.x - minXY.x;
final double domainMidPoint = maxXY.x - domainSpan / 2.0f;
final double offset = domainSpan * scale / 2.0f;
minXY.x = domainMidPoint - offset;
maxXY.x = domainMidPoint + offset;
checkBoundaries();
}
private void scroll(float pan) {
final double domainSpan = maxXY.x - minXY.x;
final double step = domainSpan / graph.getWidth();
final double offset = pan * step;
minXY.x += offset;
maxXY.x += offset;
if (minXY.x < absMinX) {
minXY.x = absMinX;
maxXY.x -= offset; // (absMinX-minXY.x);
} else if (minXY.x > maxNoError) minXY.x = maxNoError;
if (maxXY.x > absMaxX) {
maxXY.x = absMaxX; // (maxXY.x-absMaxX);
minXY.x -= offset; // (maxXY.x-absMaxX);
} else if (maxXY.x < minNoError) maxXY.x = minNoError;
if (maxXY.x - minXY.x < minDif) maxXY.x = maxXY.x + (double) (minDif - (maxXY.x - minXY.x));
graph.setDomainBoundaries(minXY.x, maxXY.x, BoundaryMode.FIXED);
}
private void checkBoundaries() {
// Make sure the proposed domain boundaries will not cause plotting issues
if (minXY.x < absMinX || ((Double) minXY.x).equals(Double.NaN)) minXY.x = absMinX;
else if (minXY.x > maxNoError) minXY.x = maxNoError;
if (maxXY.x > absMaxX || ((Double) maxXY.x).equals(Double.NaN)) maxXY.x = absMaxX;
else if (maxXY.x < minNoError) maxXY.x = minNoError;
if (maxXY.x - minXY.x < minDif) maxXY.x = maxXY.x + (double) (minDif - (maxXY.x - minXY.x));
else if (maxXY.x - minXY.x > maxDif)
maxXY.x = maxXY.x + (double) (maxDif - (maxXY.x - minXY.x));
graph.setDomainBoundaries(minXY.x, maxXY.x, BoundaryMode.FIXED);
}