Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 4620:4a30d1d62caf
Extracted method to calculate the zoomed bound of a chart.
| author | Raimund Renkert <rrenkert@intevation.de> |
|---|---|
| date | Mon, 03 Dec 2012 16:55:45 +0100 |
| parents | 0eca080fc162 |
| children | 31327b3b2455 |
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| 4619:05c9902c761d | 4620:4a30d1d62caf |
|---|---|
| 779 if (bounds == null) { | 779 if (bounds == null) { |
| 780 return false; | 780 return false; |
| 781 } | 781 } |
| 782 | 782 |
| 783 if (x != null) { | 783 if (x != null) { |
| 784 double min = bounds.getLower().doubleValue(); | 784 Bounds computed = calculateZoom(bounds, x); |
| 785 double max = bounds.getUpper().doubleValue(); | |
| 786 | |
| 787 if (logger.isDebugEnabled()) { | |
| 788 logger.debug("Minimum is: " + min); | |
| 789 logger.debug("Maximum is: " + max); | |
| 790 logger.debug("Lower zoom is: " + x.getLowerBound()); | |
| 791 logger.debug("Upper zoom is: " + x.getUpperBound()); | |
| 792 } | |
| 793 | |
| 794 double diff = max > min ? max - min : min - max; | |
| 795 | |
| 796 DoubleBounds computed = new DoubleBounds( | |
| 797 min + x.getLowerBound() * diff, | |
| 798 min + x.getUpperBound() * diff); | |
| 799 | |
| 800 computed.applyBounds(axis, AXIS_SPACE); | 785 computed.applyBounds(axis, AXIS_SPACE); |
| 801 | 786 |
| 802 logger.debug("Zoom axis to: " + computed); | 787 logger.debug("Zoom axis to: " + computed); |
| 803 | 788 |
| 804 return true; | 789 return true; |
| 806 | 791 |
| 807 bounds.applyBounds(axis, AXIS_SPACE); | 792 bounds.applyBounds(axis, AXIS_SPACE); |
| 808 return false; | 793 return false; |
| 809 } | 794 } |
| 810 | 795 |
| 796 /** | |
| 797 * Calculates the start and end km for zoomed charts. | |
| 798 * @param bounds The given total bounds (unzoomed). | |
| 799 * @param range The range specifying the zoom. | |
| 800 * | |
| 801 * @return The start and end km for the zoomed chart. | |
| 802 */ | |
| 803 protected Bounds calculateZoom(Bounds bounds, Range range) { | |
| 804 double min = bounds.getLower().doubleValue(); | |
| 805 double max = bounds.getUpper().doubleValue(); | |
| 806 | |
| 807 if (logger.isDebugEnabled()) { | |
| 808 logger.debug("Minimum is: " + min); | |
| 809 logger.debug("Maximum is: " + max); | |
| 810 logger.debug("Lower zoom is: " + range.getLowerBound()); | |
| 811 logger.debug("Upper zoom is: " + range.getUpperBound()); | |
| 812 } | |
| 813 | |
| 814 double diff = max > min ? max - min : min - max; | |
| 815 | |
| 816 DoubleBounds computed = new DoubleBounds( | |
| 817 min + range.getLowerBound() * diff, | |
| 818 min + range.getUpperBound() * diff); | |
| 819 return computed; | |
| 820 } | |
| 811 | 821 |
| 812 /** | 822 /** |
| 813 * Extract the minimum and maximum values for x and y axes | 823 * Extract the minimum and maximum values for x and y axes |
| 814 * which are stored in <i>xRanges</i> and <i>yRanges</i>. | 824 * which are stored in <i>xRanges</i> and <i>yRanges</i>. |
| 815 * | 825 * |