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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