1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.data.osm.visitor;
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3 |
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4 | import java.awt.Color;
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5 | import java.awt.Graphics;
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6 | import java.awt.Graphics2D;
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7 | import java.awt.Point;
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8 | import java.awt.Rectangle;
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9 | import java.awt.geom.GeneralPath;
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10 |
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11 | import java.util.Iterator;
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12 | import org.openstreetmap.josm.Main;
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13 | import org.openstreetmap.josm.data.Preferences;
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14 | import org.openstreetmap.josm.data.osm.DataSet;
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15 | import org.openstreetmap.josm.data.osm.Relation;
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16 | import org.openstreetmap.josm.data.osm.Node;
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17 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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18 | import org.openstreetmap.josm.data.osm.Way;
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19 | import org.openstreetmap.josm.gui.NavigatableComponent;
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20 | import org.openstreetmap.josm.tools.ColorHelper;
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21 |
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22 | /**
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23 | * A visitor that paints a simple scheme of every primitive it visits to a
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24 | * previous set graphic environment.
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25 | *
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26 | * @author imi
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27 | */
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28 | public class SimplePaintVisitor implements Visitor {
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29 |
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30 | public final static Color darkerblue = new Color(0,0,96);
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31 | public final static Color darkblue = new Color(0,0,128);
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32 | public final static Color darkgreen = new Color(0,128,0);
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33 |
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34 | /**
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35 | * The environment to paint to.
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36 | */
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37 | protected Graphics g;
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38 | /**
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39 | * MapView to get screen coordinates.
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40 | */
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41 | protected NavigatableComponent nc;
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42 |
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43 | public boolean inactive;
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44 |
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45 | protected static final double PHI = Math.toRadians(20);
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46 |
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47 | /**
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48 | * Preferences
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49 | */
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50 | protected Color inactiveColor;
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51 | protected Color selectedColor;
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52 | protected Color nodeColor;
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53 | protected Color dfltWayColor;
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54 | protected Color untaggedWayColor;
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55 | protected Color incompleteColor;
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56 | protected Color backgroundColor;
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57 | protected boolean showDirectionArrow;
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58 | protected boolean showRelevantDirectionsOnly;
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59 | protected boolean showOrderNumber;
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60 |
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61 | /**
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62 | * Draw subsequent segments of same color as one Path
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63 | */
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64 | protected Color currentColor = null;
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65 | protected GeneralPath currentPath = new GeneralPath();
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66 |
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67 | private Rectangle screen;
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68 | Rectangle bbox = new Rectangle();
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69 |
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70 | public void visitAll(DataSet data) {
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71 | inactiveColor = Preferences.getPreferencesColor("inactive", Color.DARK_GRAY);
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72 | selectedColor = Preferences.getPreferencesColor("selected", Color.WHITE);
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73 | nodeColor = Preferences.getPreferencesColor("node", Color.RED);
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74 | dfltWayColor = Preferences.getPreferencesColor("way", darkblue);
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75 | untaggedWayColor = Preferences.getPreferencesColor("untagged way", darkgreen);
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76 | incompleteColor = Preferences.getPreferencesColor("incomplete way", darkerblue);
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77 | backgroundColor = Preferences.getPreferencesColor("background", Color.BLACK);
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78 | showDirectionArrow = Main.pref.getBoolean("draw.segment.direction");
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79 | showRelevantDirectionsOnly = Main.pref.getBoolean("draw.segment.relevant_directions_only");
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80 | showOrderNumber = Main.pref.getBoolean("draw.segment.order_number");
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81 |
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82 | // draw tagged ways first, then untagged ways. takes
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83 | // time to iterate through list twice, OTOH does not
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84 | // require changing the colour while painting...
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85 | for (final OsmPrimitive osm : data.ways)
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86 | if (!osm.deleted && !osm.selected && osm.tagged)
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87 | osm.visit(this);
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88 | displaySegments(null);
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89 |
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90 | for (final OsmPrimitive osm : data.ways)
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91 | if (!osm.deleted && !osm.selected && !osm.tagged)
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92 | osm.visit(this);
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93 | displaySegments(null);
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94 |
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95 | for (final OsmPrimitive osm : data.nodes)
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96 | if (!osm.deleted && !osm.selected)
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97 | osm.visit(this);
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98 |
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99 | for (final OsmPrimitive osm : data.getSelected())
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100 | if (!osm.deleted)
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101 | osm.visit(this);
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102 | displaySegments(null);
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103 | }
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104 |
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105 | /**
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106 | * Draw a small rectangle.
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107 | * White if selected (as always) or red otherwise.
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108 | *
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109 | * @param n The node to draw.
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110 | */
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111 | public void visit(Node n) {
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112 | if (n.incomplete) return;
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113 |
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114 | Color color = null;
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115 | if (inactive)
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116 | color = inactiveColor;
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117 | else if (n.selected)
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118 | color = selectedColor;
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119 | else
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120 | color = nodeColor;
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121 | drawNode(n, color);
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122 | }
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123 |
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124 | /**
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125 | * Draw a darkblue line for all segments.
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126 | * @param w The way to draw.
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127 | */
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128 | public void visit(Way w) {
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129 | if (w.incomplete) return;
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130 |
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131 | // show direction arrows, if draw.segment.relevant_directions_only is not set, the way is tagged with a direction key
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132 | // (even if the tag is negated as in oneway=false) or the way is selected
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133 |
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134 | boolean showThisDirectionArrow = w.selected
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135 | || (showDirectionArrow
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136 | && (!showRelevantDirectionsOnly || w.hasDirectionKeys));
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137 | Color wayColor;
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138 |
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139 | if (inactive) {
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140 | wayColor = inactiveColor;
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141 | } else if (!w.tagged) {
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142 | wayColor = untaggedWayColor;
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143 | } else {
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144 | wayColor = dfltWayColor;
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145 | }
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146 |
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147 | Iterator<Node> it = w.nodes.iterator();
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148 | if (it.hasNext()) {
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149 | Point lastP = nc.getPoint(it.next().eastNorth);
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150 | for (int orderNumber = 1; it.hasNext(); orderNumber++) {
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151 | Point p = nc.getPoint(it.next().eastNorth);
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152 | drawSegment(lastP, p, w.selected && !inactive ? selectedColor : wayColor, showThisDirectionArrow);
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153 | if (showOrderNumber)
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154 | drawOrderNumber(lastP, p, orderNumber);
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155 | lastP = p;
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156 | }
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157 | }
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158 | }
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159 |
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160 | public void visit(Relation e) {
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161 | // relations are not (yet?) drawn.
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162 | }
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163 |
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164 | /**
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165 | * Draw an number of the order of the two consecutive nodes within the
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166 | * parents way
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167 | */
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168 | protected void drawOrderNumber(Point p1, Point p2, int orderNumber) {
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169 | int strlen = (""+orderNumber).length();
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170 | int x = (p1.x+p2.x)/2 - 4*strlen;
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171 | int y = (p1.y+p2.y)/2 + 4;
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172 |
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173 | if (screen.contains(x,y)) {
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174 | Color c = g.getColor();
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175 | g.setColor(backgroundColor);
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176 | g.fillRect(x-1, y-12, 8*strlen+1, 14);
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177 | g.setColor(c);
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178 | g.drawString(""+orderNumber, x, y);
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179 | }
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180 | }
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181 |
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182 | /**
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183 | * Draw the node as small rectangle with the given color.
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184 | *
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185 | * @param n The node to draw.
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186 | * @param color The color of the node.
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187 | */
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188 | public void drawNode(Node n, Color color) {
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189 | Point p = nc.getPoint(n.eastNorth);
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190 | g.setColor(color);
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191 |
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192 | if (screen.contains(p.x, p.y))
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193 | if (n.tagged) {
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194 | g.drawRect(p.x, p.y, 0, 0);
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195 | g.drawRect(p.x-2, p.y-2, 4, 4);
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196 | } else {
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197 | g.drawRect(p.x-1, p.y-1, 2, 2);
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198 | }
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199 | }
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200 |
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201 | /**
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202 | * Draw a line with the given color.
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203 | */
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204 | protected void drawSegment(Point p1, Point p2, Color col, boolean showDirection) {
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205 |
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206 | if (col != currentColor) displaySegments(col);
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207 |
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208 | if (onScreen(p1, p2)) {
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209 | currentPath.moveTo(p1.x, p1.y);
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210 | currentPath.lineTo(p2.x, p2.y);
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211 |
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212 | if (showDirection) {
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213 | double t = Math.atan2(p2.y-p1.y, p2.x-p1.x) + Math.PI;
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214 | currentPath.lineTo((int)(p2.x + 10*Math.cos(t-PHI)), (int)(p2.y + 10*Math.sin(t-PHI)));
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215 | currentPath.moveTo((int)(p2.x + 10*Math.cos(t+PHI)), (int)(p2.y + 10*Math.sin(t+PHI)));
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216 | currentPath.lineTo(p2.x, p2.y);
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217 | }
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218 | }
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219 | }
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220 |
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221 | private boolean onScreen(Point p1, Point p2) {
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222 | bbox.setBounds(p1.x, p1.y, 0, 0);
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223 | bbox.add(p2);
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224 | if (bbox.height + bbox.width < 1) return false;
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225 | bbox.width++;
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226 | bbox.height++;
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227 | return screen.intersects(bbox);
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228 | }
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229 |
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230 | public void setGraphics(Graphics g) {
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231 | this.g = g;
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232 | screen = g.getClipBounds();
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233 | }
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234 |
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235 | public void setNavigatableComponent(NavigatableComponent nc) {
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236 | this.nc = nc;
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237 | }
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238 |
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239 | protected void displaySegments(Color newColor) {
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240 | if (currentPath != null) {
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241 | g.setColor(currentColor);
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242 | ((Graphics2D) g).draw(currentPath);
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243 | currentPath = new GeneralPath();
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244 | currentColor = newColor;
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245 | }
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246 | }
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247 |
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248 | /**
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249 | * Provided for backwards compatibility only.
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250 | * FIXME: remove this once not used by plugins any longer.
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251 | */
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252 | public static Color getPreferencesColor(String name, Color dflt) {
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253 | return Preferences.getPreferencesColor(name, dflt);
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254 | }
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255 | }
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