1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.actions;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.GridBagLayout;
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7 | import java.awt.geom.Area;
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8 | import java.awt.geom.Rectangle2D;
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9 | import java.util.ArrayList;
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10 | import java.util.Collection;
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11 | import java.util.List;
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12 | import java.util.concurrent.Future;
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13 |
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14 | import javax.swing.JLabel;
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15 | import javax.swing.JOptionPane;
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16 | import javax.swing.JPanel;
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17 |
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18 | import org.openstreetmap.josm.Main;
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19 | import org.openstreetmap.josm.actions.downloadtasks.DownloadTaskList;
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20 | import org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor;
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21 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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22 | import org.openstreetmap.josm.tools.GBC;
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23 | import org.openstreetmap.josm.tools.Shortcut;
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24 |
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25 | /**
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26 | * Abstract superclass of DownloadAlongTrackAction and DownloadAlongWayAction
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27 | * @since 6054
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28 | */
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29 | public abstract class DownloadAlongAction extends JosmAction {
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30 |
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31 | /**
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32 | * Constructs a new {@code DownloadAlongAction}
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33 | * @param name the action's text as displayed in the menu
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34 | * @param iconName the filename of the icon to use
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35 | * @param tooltip a longer description of the action that will be displayed in the tooltip. Please note
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36 | * that html is not supported for menu actions on some platforms.
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37 | * @param shortcut a ready-created shortcut object or null if you don't want a shortcut. But you always
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38 | * do want a shortcut, remember you can always register it with group=none, so you
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39 | * won't be assigned a shortcut unless the user configures one. If you pass null here,
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40 | * the user CANNOT configure a shortcut for your action.
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41 | * @param registerInToolbar register this action for the toolbar preferences?
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42 | */
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43 | public DownloadAlongAction(String name, String iconName, String tooltip, Shortcut shortcut, boolean registerInToolbar) {
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44 | super(name, iconName, tooltip, shortcut, registerInToolbar);
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45 | }
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46 |
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47 | protected static void addToDownload(Area a, Rectangle2D r, Collection<Rectangle2D> results, double maxArea) {
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48 | Area tmp = new Area(r);
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49 | // intersect with sought-after area
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50 | tmp.intersect(a);
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51 | if (tmp.isEmpty()) {
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52 | return;
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53 | }
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54 | Rectangle2D bounds = tmp.getBounds2D();
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55 | if (bounds.getWidth() * bounds.getHeight() > maxArea) {
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56 | // the rectangle gets too large; split it and make recursive call.
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57 | Rectangle2D r1;
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58 | Rectangle2D r2;
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59 | if (bounds.getWidth() > bounds.getHeight()) {
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60 | // rectangles that are wider than high are split into a left and right half,
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61 | r1 = new Rectangle2D.Double(bounds.getX(), bounds.getY(), bounds.getWidth() / 2, bounds.getHeight());
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62 | r2 = new Rectangle2D.Double(bounds.getX() + bounds.getWidth() / 2, bounds.getY(),
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63 | bounds.getWidth() / 2, bounds.getHeight());
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64 | } else {
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65 | // others into a top and bottom half.
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66 | r1 = new Rectangle2D.Double(bounds.getX(), bounds.getY(), bounds.getWidth(), bounds.getHeight() / 2);
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67 | r2 = new Rectangle2D.Double(bounds.getX(), bounds.getY() + bounds.getHeight() / 2, bounds.getWidth(),
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68 | bounds.getHeight() / 2);
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69 | }
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70 | addToDownload(a, r1, results, maxArea);
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71 | addToDownload(a, r2, results, maxArea);
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72 | } else {
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73 | results.add(bounds);
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74 | }
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75 | }
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76 |
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77 | /**
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78 | * Area "a" contains the hull that we would like to download data for. however we
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79 | * can only download rectangles, so the following is an attempt at finding a number of
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80 | * rectangles to download.
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81 | *
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82 | * The idea is simply: Start out with the full bounding box. If it is too large, then
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83 | * split it in half and repeat recursively for each half until you arrive at something
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84 | * small enough to download. The algorithm is improved by always using the intersection
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85 | * between the rectangle and the actual desired area. For example, if you have a track
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86 | * that goes like this: +----+ | /| | / | | / | |/ | +----+ then we would first look at
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87 | * downloading the whole rectangle (assume it's too big), after that we split it in half
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88 | * (upper and lower half), but we donot request the full upper and lower rectangle, only
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89 | * the part of the upper/lower rectangle that actually has something in it.
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90 | *
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91 | * This functions calculates the rectangles, asks the user to continue and downloads
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92 | * the areas if applicable.
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93 | */
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94 | protected static void confirmAndDownloadAreas(Area a, double maxArea, boolean osmDownload, boolean gpxDownload, String title, ProgressMonitor progressMonitor) {
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95 | List<Rectangle2D> toDownload = new ArrayList<>();
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96 | addToDownload(a, a.getBounds(), toDownload, maxArea);
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97 | if (toDownload.isEmpty()) {
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98 | return;
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99 | }
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100 | JPanel msg = new JPanel(new GridBagLayout());
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101 | msg.add(new JLabel(tr("<html>This action will require {0} individual<br>" + "download requests. Do you wish<br>to continue?</html>", toDownload.size())), GBC.eol());
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102 | if (JOptionPane.OK_OPTION != JOptionPane.showConfirmDialog(Main.parent, msg, title, JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE)) {
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103 | return;
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104 | }
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105 | final PleaseWaitProgressMonitor monitor = new PleaseWaitProgressMonitor(tr("Download data"));
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106 | final Future<?> future = new DownloadTaskList().download(false, toDownload, osmDownload, gpxDownload, monitor);
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107 | Main.worker.submit(new Runnable() {
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108 | @Override
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109 | public void run() {
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110 | try {
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111 | future.get();
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112 | } catch (Exception e) {
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113 | Main.error(e);
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114 | return;
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115 | }
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116 | monitor.close();
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117 | }
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118 | });
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119 | }
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120 | }
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