[7937] | 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.data;
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| 3 |
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| 4 | import org.openstreetmap.josm.data.coor.EastNorth;
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| 5 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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| 6 |
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| 7 | /**
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| 8 | * Data class to keep viewport information.
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| 9 | *
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| 10 | * This can be either a combination of map center and map scale or
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| 11 | * a rectangle in east-north coordinate space.
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| 12 | *
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| 13 | * Either of those will be null, so the consumer of the ViewportData
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| 14 | * object has to check, which one is set.
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| 15 | *
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| 16 | * @since 5670 (creation)
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| 17 | * @since 6992 (extraction in this package)
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| 18 | */
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| 19 | public class ViewportData {
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| 20 | private final EastNorth center;
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| 21 | private final Double scale;
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| 22 |
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| 23 | private final ProjectionBounds bounds;
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| 24 |
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| 25 | /**
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| 26 | * Constructs a new {@code ViewportData}.
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| 27 | * @param center Projected coordinates of the map center
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| 28 | * @param scale Scale factor in east-/north-units per pixel
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| 29 | */
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| 30 | public ViewportData(EastNorth center, Double scale) {
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| 31 | CheckParameterUtil.ensureParameterNotNull(center);
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| 32 | CheckParameterUtil.ensureParameterNotNull(scale);
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| 33 | this.center = center;
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| 34 | this.scale = scale;
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| 35 | this.bounds = null;
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| 36 | }
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| 37 |
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| 38 | public ViewportData(ProjectionBounds bounds) {
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| 39 | CheckParameterUtil.ensureParameterNotNull(bounds);
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| 40 | this.center = null;
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| 41 | this.scale = null;
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| 42 | this.bounds = bounds;
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| 43 | }
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| 44 |
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| 45 | /**
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| 46 | * Return the projected coordinates of the map center
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| 47 | * @return the center
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| 48 | */
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| 49 | public EastNorth getCenter() {
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| 50 | return center;
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| 51 | }
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| 52 |
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| 53 | /**
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| 54 | * Return the scale factor in east-/north-units per pixel.
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| 55 | * @return the scale
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| 56 | */
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| 57 | public Double getScale() {
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| 58 | return scale;
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| 59 | }
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| 60 |
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| 61 | /**
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| 62 | * Return the bounds in east-north coordinate space.
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| 63 | * @return the bounds
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| 64 | */
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| 65 | public ProjectionBounds getBounds() {
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| 66 | return bounds;
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| 67 | }
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| 68 | }
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