1 | /*
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2 | * GPLv2 or 3, Copyright (c) 2010 Andrzej Zaborowski
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3 | */
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4 | package wmsturbochallenge;
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5 |
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6 | import java.awt.Graphics;
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7 | import java.awt.Graphics2D;
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8 | import java.awt.Point;
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9 | import java.awt.image.BufferedImage;
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10 |
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11 | import org.openstreetmap.josm.data.ProjectionBounds;
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12 | import org.openstreetmap.josm.data.coor.EastNorth;
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13 | import org.openstreetmap.josm.gui.MapView;
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14 |
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15 | /**
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16 | * Implements a fake MapView that we can pass to WMSLayer's .paint,
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17 | * this will give us two things:
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18 | * # We'll be able to tell WMSLayer.paint() what area we want it
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19 | * to download (it ignores the "bounds" parameter) and override
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20 | * isVisible and friends as needed, and
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21 | * # We'll receive notifications from Grabber when we need to
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22 | * repaint (and call WMSLayer's .paint again) because the
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23 | * Grabber downloaded some or all of the tiles that we asked
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24 | * WMSLayer for and WMSLayer created the Grabber passing it
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25 | * our MapView. Otherwise we wouldn't be able to tell when
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26 | * this happened and could only guess.
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27 | */
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28 | class FakeMapView extends MapView {
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29 | public ProjectionBounds view_bounds;
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30 | public MapView parent;
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31 |
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32 | public Graphics2D graphics;
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33 | public BufferedImage ground_image;
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34 | public int ground_width = -1;
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35 | public int ground_height = -1;
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36 | public double scale;
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37 | public double max_east_west;
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38 |
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39 | FakeMapView(MapView parent, double scale) {
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40 | // TODO: MapView constructor contains registering listeners and other code, that probably shouldn't be called in fake map view
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41 | super(null, null, null);
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42 | this.parent = parent;
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43 | this.scale = scale;
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44 |
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45 | ProjectionBounds parent_bounds = parent.getProjectionBounds();
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46 | max_east_west =
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47 | parent_bounds.maxEast - parent_bounds.minEast;
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48 | }
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49 |
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50 | public void setProjectionBounds(ProjectionBounds bounds) {
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51 | view_bounds = bounds;
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52 |
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53 | if (bounds.maxEast - bounds.minEast > max_east_west) {
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54 | max_east_west = bounds.maxEast - bounds.minEast;
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55 |
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56 | /* We need to set the parent MapView's bounds (i.e.
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57 | * zoom level) to the same as ours max possible
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58 | * bounds to avoid WMSLayer thinking we're zoomed
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59 | * out more than we are or it'll pop up an annoying
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60 | * "requested area is too large" popup.
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61 | */
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62 | EastNorth parent_center = parent.getCenter();
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63 | parent.zoomTo(new ProjectionBounds(
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64 | new EastNorth(
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65 | parent_center.east() -
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66 | max_east_west / 2,
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67 | parent_center.north()),
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68 | new EastNorth(
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69 | parent_center.east() +
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70 | max_east_west / 2,
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71 | parent_center.north())));
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72 |
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73 | /* Request again because NavigatableContent adds
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74 | * a border just to be sure.
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75 | */
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76 | ProjectionBounds new_bounds =
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77 | parent.getProjectionBounds();
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78 | max_east_west =
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79 | new_bounds.maxEast - new_bounds.minEast;
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80 | }
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81 |
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82 | Point vmin = getPoint(bounds.getMin());
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83 | Point vmax = getPoint(bounds.getMax());
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84 | int w = vmax.x + 1;
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85 | int h = vmin.y + 1;
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86 |
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87 | if (w <= ground_width && h <= ground_height) {
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88 | graphics.setClip(0, 0, w, h);
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89 | return;
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90 | }
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91 |
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92 | if (w > ground_width)
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93 | ground_width = w;
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94 | if (h > ground_height)
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95 | ground_height = h;
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96 |
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97 | ground_image = new BufferedImage(ground_width,
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98 | ground_height,
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99 | BufferedImage.TYPE_INT_RGB);
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100 | graphics = ground_image.createGraphics();
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101 | graphics.setClip(0, 0, w, h);
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102 | }
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103 |
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104 | @Override
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105 | public ProjectionBounds getProjectionBounds() {
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106 | return view_bounds;
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107 | }
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108 |
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109 | @Override
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110 | public Point getPoint(EastNorth p) {
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111 | double x = p.east() - view_bounds.minEast;
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112 | double y = view_bounds.maxNorth - p.north();
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113 | x /= this.scale;
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114 | y /= this.scale;
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115 |
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116 | return new Point((int) x, (int) y);
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117 | }
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118 |
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119 | @Override
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120 | public EastNorth getEastNorth(int x, int y) {
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121 | return new EastNorth(
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122 | view_bounds.minEast + x * this.scale,
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123 | view_bounds.minNorth - y * this.scale);
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124 | }
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125 |
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126 | public boolean isVisible(int x, int y) {
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127 | return true;
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128 | }
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129 |
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130 | @Override
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131 | public Graphics getGraphics() {
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132 | return graphics;
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133 | }
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134 |
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135 | @Override
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136 | public void repaint() {
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137 | }
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138 | }
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