001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.actions; 003 004import static org.openstreetmap.josm.tools.I18n.tr; 005 006import java.awt.GridBagLayout; 007import java.awt.geom.Area; 008import java.awt.geom.Rectangle2D; 009import java.util.ArrayList; 010import java.util.Collection; 011import java.util.List; 012import java.util.concurrent.Future; 013 014import javax.swing.JLabel; 015import javax.swing.JOptionPane; 016import javax.swing.JPanel; 017 018import org.openstreetmap.josm.Main; 019import org.openstreetmap.josm.actions.downloadtasks.DownloadTaskList; 020import org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor; 021import org.openstreetmap.josm.gui.progress.ProgressMonitor; 022import org.openstreetmap.josm.tools.GBC; 023import org.openstreetmap.josm.tools.Shortcut; 024 025/** 026 * Abstract superclass of DownloadAlongTrackAction and DownloadAlongWayAction 027 * @since 6054 028 */ 029public abstract class DownloadAlongAction extends JosmAction { 030 031 /** 032 * Constructs a new {@code DownloadAlongAction} 033 * @param name the action's text as displayed in the menu 034 * @param iconName the filename of the icon to use 035 * @param tooltip a longer description of the action that will be displayed in the tooltip. Please note 036 * that html is not supported for menu actions on some platforms. 037 * @param shortcut a ready-created shortcut object or null if you don't want a shortcut. But you always 038 * do want a shortcut, remember you can always register it with group=none, so you 039 * won't be assigned a shortcut unless the user configures one. If you pass null here, 040 * the user CANNOT configure a shortcut for your action. 041 * @param registerInToolbar register this action for the toolbar preferences? 042 */ 043 public DownloadAlongAction(String name, String iconName, String tooltip, Shortcut shortcut, boolean registerInToolbar) { 044 super(name, iconName, tooltip, shortcut, registerInToolbar); 045 } 046 047 protected static void addToDownload(Area a, Rectangle2D r, Collection<Rectangle2D> results, double max_area) { 048 Area tmp = new Area(r); 049 // intersect with sought-after area 050 tmp.intersect(a); 051 if (tmp.isEmpty()) { 052 return; 053 } 054 Rectangle2D bounds = tmp.getBounds2D(); 055 if (bounds.getWidth() * bounds.getHeight() > max_area) { 056 // the rectangle gets too large; split it and make recursive call. 057 Rectangle2D r1; 058 Rectangle2D r2; 059 if (bounds.getWidth() > bounds.getHeight()) { 060 // rectangles that are wider than high are split into a left and right half, 061 r1 = new Rectangle2D.Double(bounds.getX(), bounds.getY(), bounds.getWidth() / 2, bounds.getHeight()); 062 r2 = new Rectangle2D.Double(bounds.getX() + bounds.getWidth() / 2, bounds.getY(), 063 bounds.getWidth() / 2, bounds.getHeight()); 064 } else { 065 // others into a top and bottom half. 066 r1 = new Rectangle2D.Double(bounds.getX(), bounds.getY(), bounds.getWidth(), bounds.getHeight() / 2); 067 r2 = new Rectangle2D.Double(bounds.getX(), bounds.getY() + bounds.getHeight() / 2, bounds.getWidth(), 068 bounds.getHeight() / 2); 069 } 070 addToDownload(a, r1, results, max_area); 071 addToDownload(a, r2, results, max_area); 072 } else { 073 results.add(bounds); 074 } 075 } 076 077 /** 078 * Area "a" contains the hull that we would like to download data for. however we 079 * can only download rectangles, so the following is an attempt at finding a number of 080 * rectangles to download. 081 * 082 * The idea is simply: Start out with the full bounding box. If it is too large, then 083 * split it in half and repeat recursively for each half until you arrive at something 084 * small enough to download. The algorithm is improved by always using the intersection 085 * between the rectangle and the actual desired area. For example, if you have a track 086 * that goes like this: +----+ | /| | / | | / | |/ | +----+ then we would first look at 087 * downloading the whole rectangle (assume it's too big), after that we split it in half 088 * (upper and lower half), but we donot request the full upper and lower rectangle, only 089 * the part of the upper/lower rectangle that actually has something in it. 090 * 091 * This functions calculates the rectangles, asks the user to continue and downloads 092 * the areas if applicable. 093 */ 094 protected static void confirmAndDownloadAreas(Area a, double max_area, boolean osmDownload, boolean gpxDownload, String title, ProgressMonitor progressMonitor) { 095 List<Rectangle2D> toDownload = new ArrayList<Rectangle2D>(); 096 addToDownload(a, a.getBounds(), toDownload, max_area); 097 if (toDownload.isEmpty()) { 098 return; 099 } 100 JPanel msg = new JPanel(new GridBagLayout()); 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()); 102 if (JOptionPane.OK_OPTION != JOptionPane.showConfirmDialog(Main.parent, msg, title, JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE)) { 103 return; 104 } 105 final PleaseWaitProgressMonitor monitor = new PleaseWaitProgressMonitor(tr("Download data")); 106 final Future<?> future = new DownloadTaskList().download(false, toDownload, osmDownload, gpxDownload, monitor); 107 Main.worker.submit(new Runnable() { 108 @Override 109 public void run() { 110 try { 111 future.get(); 112 } catch (Exception e) { 113 e.printStackTrace(); 114 return; 115 } 116 monitor.close(); 117 } 118 }); 119 } 120}