1 | package org.openstreetmap.josm.actions.mapmode;
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2 |
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3 | import java.awt.Rectangle;
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4 | import java.awt.event.KeyEvent;
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5 | import java.util.Collection;
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6 | import java.util.LinkedList;
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7 |
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8 | import org.openstreetmap.josm.Main;
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9 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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10 | import org.openstreetmap.josm.gui.MapFrame;
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11 | import org.openstreetmap.josm.gui.SelectionManager;
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12 | import org.openstreetmap.josm.gui.SelectionManager.SelectionEnded;
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13 | import org.openstreetmap.josm.tools.ImageProvider;
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14 |
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15 | /**
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16 | * This MapMode enables the user to easy make a selection of different objects.
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17 | *
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18 | * The selected objects are drawn in a different style.
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19 | *
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20 | * Holding and dragging the left mouse button draws an selection rectangle.
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21 | * When releasing the left mouse button, all objects within the rectangle get
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22 | * selected.
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23 | *
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24 | * When releasing the left mouse button while the right mouse button pressed,
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25 | * nothing happens (the selection rectangle will be cleared, however).
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26 | *
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27 | * When releasing the mouse button and one of the following keys was hold:
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28 | *
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29 | * If Alt key was hold, select all objects that are touched by the
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30 | * selection rectangle. If the Alt key was not hold, select only those objects
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31 | * completly within (e.g. for ways mean: only if all nodes of the way are
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32 | * within).
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33 | *
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34 | * If Shift key was hold, the objects are added to the current selection. If
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35 | * Shift key wasn't hold, the current selection get replaced.
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36 | *
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37 | * If Ctrl key was hold, remove all objects under the current rectangle from
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38 | * the active selection (if there were any). Nothing is added to the current
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39 | * selection.
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40 | *
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41 | * Alt can be combined with Ctrl or Shift. Ctrl and Shift cannot be combined.
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42 | * If both are pressed, nothing happens when releasing the mouse button.
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43 | *
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44 | * The user can also only click on the map. All total movements of 2 or less
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45 | * pixel are considered "only click". If that happens, the nearest Node will
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46 | * be selected if there is any within 10 pixel range. If there is no Node within
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47 | * 10 pixel, the nearest Segment (or Street, if user hold down the Alt-Key)
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48 | * within 10 pixel range is selected. If there is no Segment within 10 pixel
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49 | * and the user clicked in or 10 pixel away from an area, this area is selected.
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50 | * If there is even no area, nothing is selected. Shift and Ctrl key applies to
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51 | * this as usual. For more, @see MapView#getNearest(Point, boolean)
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52 | *
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53 | * @author imi
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54 | */
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55 | public class SelectionAction extends MapMode implements SelectionEnded {
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56 |
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57 | /**
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58 | * The SelectionManager that manages the selection rectangle.
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59 | */
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60 | private SelectionManager selectionManager;
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61 |
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62 | /**
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63 | * Create a new SelectionAction in the given frame.
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64 | * @param mapFrame The frame this action belongs to
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65 | */
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66 | public SelectionAction(MapFrame mapFrame) {
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67 | super("Selection",
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68 | "selection",
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69 | "Select objects by dragging or clicking.",
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70 | "S",
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71 | KeyEvent.VK_S,
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72 | mapFrame,
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73 | ImageProvider.getCursor("normal", "selection"));
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74 | this.selectionManager = new SelectionManager(this, false, mapFrame.mapView);
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75 | }
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76 |
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77 | @Override public void enterMode() {
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78 | super.enterMode();
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79 | selectionManager.register(Main.map.mapView);
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80 | }
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81 |
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82 | @Override public void exitMode() {
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83 | super.exitMode();
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84 | selectionManager.unregister(Main.map.mapView);
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85 | }
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86 |
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87 |
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88 | /**
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89 | * Check the state of the keys and buttons and set the selection accordingly.
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90 | */
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91 | public void selectionEnded(Rectangle r, boolean alt, boolean shift, boolean ctrl) {
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92 | if (shift && ctrl)
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93 | return; // not allowed together
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94 |
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95 | Collection<OsmPrimitive> curSel;
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96 | if (!ctrl && !shift)
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97 | curSel = new LinkedList<OsmPrimitive>(); // new selection will replace the old.
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98 | else
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99 | curSel = Main.ds.getSelected();
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100 |
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101 | Collection<OsmPrimitive> selectionList = selectionManager.getObjectsInRectangle(r,alt);
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102 | for (OsmPrimitive osm : selectionList)
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103 | if (ctrl)
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104 | curSel.remove(osm);
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105 | else
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106 | curSel.add(osm);
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107 | Main.ds.setSelected(curSel);
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108 | Main.map.mapView.repaint();
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109 | }
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110 | }
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