[6380] | 1 | // License: GPL. For details, see LICENSE file.
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[4] | 2 | package org.openstreetmap.josm.gui;
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[3] | 3 |
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[8550] | 4 | import java.awt.Color;
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| 5 | import java.awt.Graphics2D;
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[3] | 6 | import java.awt.Point;
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[5152] | 7 | import java.awt.Polygon;
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[3] | 8 | import java.awt.Rectangle;
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| 9 | import java.awt.event.InputEvent;
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| 10 | import java.awt.event.MouseEvent;
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| 11 | import java.awt.event.MouseListener;
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| 12 | import java.awt.event.MouseMotionListener;
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[7] | 13 | import java.beans.PropertyChangeEvent;
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| 14 | import java.beans.PropertyChangeListener;
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| 15 | import java.util.Collection;
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| 16 | import java.util.LinkedList;
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[3] | 17 |
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[7144] | 18 | import org.openstreetmap.josm.Main;
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[7146] | 19 | import org.openstreetmap.josm.actions.SelectByInternalPointAction;
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[8550] | 20 | import org.openstreetmap.josm.data.Bounds;
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[7] | 21 | import org.openstreetmap.josm.data.osm.Node;
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| 22 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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[64] | 23 | import org.openstreetmap.josm.data.osm.Way;
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[8550] | 24 | import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
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| 25 | import org.openstreetmap.josm.gui.layer.MapViewPaintable;
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| 26 | import org.openstreetmap.josm.tools.Utils;
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[7] | 27 |
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[3] | 28 | /**
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[8550] | 29 | * Manages the selection of a rectangle or a lasso loop. Listening to left and right mouse button
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[3] | 30 | * presses and to mouse motions and draw the rectangle accordingly.
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[1169] | 31 | *
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[3] | 32 | * Left mouse button selects a rectangle from the press until release. Pressing
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[8550] | 33 | * right mouse button while left is still pressed enable the selection area to move
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[3] | 34 | * around. Releasing the left button fires an action event to the listener given
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| 35 | * at constructor, except if the right is still pressed, which just remove the
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| 36 | * selection rectangle and does nothing.
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[1169] | 37 | *
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[8550] | 38 | * It is possible to switch between lasso selection and rectangle selection by using {@link #setLassoMode(boolean)}.
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| 39 | *
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[1169] | 40 | * The point where the left mouse button was pressed and the current mouse
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[3] | 41 | * position are two opposite corners of the selection rectangle.
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[1169] | 42 | *
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[8550] | 43 | * For rectangle mode, it is possible to specify an aspect ratio (width per height) which the
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[3] | 44 | * selection rectangle always must have. In this case, the selection rectangle
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| 45 | * will be the largest window with this aspect ratio, where the position the left
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[1169] | 46 | * mouse button was pressed and the corner of the current mouse position are at
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[3] | 47 | * opposite sites (the mouse position corner is the corner nearest to the mouse
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[1169] | 48 | * cursor).
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| 49 | *
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| 50 | * When the left mouse button was released, an ActionEvent is send to the
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[3] | 51 | * ActionListener given at constructor. The source of this event is this manager.
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[1169] | 52 | *
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[3] | 53 | * @author imi
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| 54 | */
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[7] | 55 | public class SelectionManager implements MouseListener, MouseMotionListener, PropertyChangeListener {
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[3] | 56 |
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[1169] | 57 | /**
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| 58 | * This is the interface that an user of SelectionManager has to implement
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| 59 | * to get informed when a selection closes.
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| 60 | * @author imi
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| 61 | */
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| 62 | public interface SelectionEnded {
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| 63 | /**
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| 64 | * Called, when the left mouse button was released.
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[8550] | 65 | * @param r The rectangle that encloses the current selection.
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[5500] | 66 | * @param e The mouse event.
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[1169] | 67 | * @see InputEvent#getModifiersEx()
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[8550] | 68 | * @see SelectionManager#getSelectedObjects(boolean)
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[1169] | 69 | */
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[8512] | 70 | void selectionEnded(Rectangle r, MouseEvent e);
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| 71 |
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[1169] | 72 | /**
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| 73 | * Called to register the selection manager for "active" property.
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| 74 | * @param listener The listener to register
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| 75 | */
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[8512] | 76 | void addPropertyChangeListener(PropertyChangeListener listener);
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| 77 |
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[1169] | 78 | /**
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| 79 | * Called to remove the selection manager from the listener list
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| 80 | * for "active" property.
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| 81 | * @param listener The listener to register
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| 82 | */
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[8512] | 83 | void removePropertyChangeListener(PropertyChangeListener listener);
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[1169] | 84 | }
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[8550] | 85 |
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[1169] | 86 | /**
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[8550] | 87 | * This draws the selection hint (rectangle or lasso polygon) on the screen.
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| 88 | *
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| 89 | * @author Michael Zangl
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| 90 | */
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| 91 | private class SelectionHintLayer implements MapViewPaintable {
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| 92 | @Override
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| 93 | public void paint(Graphics2D g, MapView mv, Bounds bbox) {
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| 94 | if (mousePos == null || mousePosStart == null || mousePos == mousePosStart)
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| 95 | return;
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| 96 | Color color = Utils.complement(PaintColors.getBackgroundColor());
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| 97 | g.setColor(color);
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| 98 | if (lassoMode) {
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| 99 | g.drawPolygon(lasso);
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| 100 |
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| 101 | g.setColor(new Color(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha() / 8));
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| 102 | g.fillPolygon(lasso);
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| 103 | } else {
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| 104 | Rectangle paintRect = getSelectionRectangle();
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| 105 | g.drawRect(paintRect.x, paintRect.y, paintRect.width, paintRect.height);
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| 106 | }
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | /**
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[1169] | 111 | * The listener that receives the events after left mouse button is released.
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| 112 | */
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| 113 | private final SelectionEnded selectionEndedListener;
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| 114 | /**
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| 115 | * Position of the map when the mouse button was pressed.
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[8550] | 116 | * If this is not <code>null</code>, a rectangle/lasso line is drawn on screen.
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| 117 | * If this is <code>null</code>, no selection is active.
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[1169] | 118 | */
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| 119 | private Point mousePosStart;
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| 120 | /**
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[8550] | 121 | * The last position of the mouse while the mouse button was pressed.
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[1169] | 122 | */
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| 123 | private Point mousePos;
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| 124 | /**
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[8550] | 125 | * The Component that provides us with OSM data and the aspect is taken from.
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[1169] | 126 | */
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| 127 | private final NavigatableComponent nc;
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| 128 | /**
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[9078] | 129 | * Whether the selection rectangle must obtain the aspect ratio of the drawComponent.
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[1169] | 130 | */
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[9078] | 131 | private final boolean aspectRatio;
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[3] | 132 |
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[8550] | 133 | /**
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| 134 | * <code>true</code> if we should paint a lasso instead of a rectangle.
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| 135 | */
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[5152] | 136 | private boolean lassoMode;
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[8550] | 137 | /**
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| 138 | * The polygon to store the selection outline if {@link #lassoMode} is used.
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| 139 | */
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[9078] | 140 | private final Polygon lasso = new Polygon();
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[5152] | 141 |
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[1169] | 142 | /**
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[8550] | 143 | * The result of the last selection.
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| 144 | */
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| 145 | private Polygon selectionResult = new Polygon();
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| 146 |
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| 147 | private final SelectionHintLayer selectionHintLayer = new SelectionHintLayer();
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| 148 |
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| 149 | /**
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[1169] | 150 | * Create a new SelectionManager.
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| 151 | *
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| 152 | * @param selectionEndedListener The action listener that receives the event when
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| 153 | * the left button is released.
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| 154 | * @param aspectRatio If true, the selection window must obtain the aspect
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| 155 | * ratio of the drawComponent.
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[8550] | 156 | * @param navComp The component that provides us with OSM data and the aspect is taken from.
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[1169] | 157 | */
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| 158 | public SelectionManager(SelectionEnded selectionEndedListener, boolean aspectRatio, NavigatableComponent navComp) {
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| 159 | this.selectionEndedListener = selectionEndedListener;
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| 160 | this.aspectRatio = aspectRatio;
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| 161 | this.nc = navComp;
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| 162 | }
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| 163 |
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| 164 | /**
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[8550] | 165 | * Register itself at the given event source and add a hint layer.
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[1169] | 166 | * @param eventSource The emitter of the mouse events.
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[5500] | 167 | * @param lassoMode {@code true} to enable lasso mode, {@code false} to disable it.
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[1169] | 168 | */
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[8550] | 169 | public void register(MapView eventSource, boolean lassoMode) {
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[5152] | 170 | this.lassoMode = lassoMode;
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[1169] | 171 | eventSource.addMouseListener(this);
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| 172 | eventSource.addMouseMotionListener(this);
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| 173 | selectionEndedListener.addPropertyChangeListener(this);
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[8510] | 174 | eventSource.addPropertyChangeListener("scale", new PropertyChangeListener() {
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[6084] | 175 | @Override
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[1169] | 176 | public void propertyChange(PropertyChangeEvent evt) {
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[8550] | 177 | abortSelecting();
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[100] | 178 | }
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| 179 | });
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[8550] | 180 | eventSource.addTemporaryLayer(selectionHintLayer);
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[1169] | 181 | }
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[9059] | 182 |
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[1169] | 183 | /**
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[8550] | 184 | * Unregister itself from the given event source and hide the selection hint layer.
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[1169] | 185 | *
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| 186 | * @param eventSource The emitter of the mouse events.
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| 187 | */
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[8550] | 188 | public void unregister(MapView eventSource) {
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| 189 | abortSelecting();
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| 190 | eventSource.removeTemporaryLayer(selectionHintLayer);
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[1169] | 191 | eventSource.removeMouseListener(this);
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| 192 | eventSource.removeMouseMotionListener(this);
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| 193 | selectionEndedListener.removePropertyChangeListener(this);
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| 194 | }
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[3] | 195 |
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[1169] | 196 | /**
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| 197 | * If the correct button, from the "drawing rectangle" mode
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| 198 | */
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[6084] | 199 | @Override
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[1169] | 200 | public void mousePressed(MouseEvent e) {
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[7921] | 201 | if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() > 1 && Main.main.getCurrentDataSet() != null) {
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[7146] | 202 | SelectByInternalPointAction.performSelection(Main.map.mapView.getEastNorth(e.getX(), e.getY()),
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[7144] | 203 | (e.getModifiersEx() & MouseEvent.SHIFT_DOWN_MASK) > 0,
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| 204 | (e.getModifiersEx() & MouseEvent.CTRL_DOWN_MASK) > 0);
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| 205 | } else if (e.getButton() == MouseEvent.BUTTON1) {
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[1169] | 206 | mousePosStart = mousePos = e.getPoint();
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[5152] | 207 |
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| 208 | lasso.reset();
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| 209 | lasso.addPoint(mousePosStart.x, mousePosStart.y);
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[1911] | 210 | }
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[1169] | 211 | }
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[3] | 212 |
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[1169] | 213 | /**
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| 214 | * If the correct button is hold, draw the rectangle.
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| 215 | */
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[6084] | 216 | @Override
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[1169] | 217 | public void mouseDragged(MouseEvent e) {
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| 218 | int buttonPressed = e.getModifiersEx() & (MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON3_DOWN_MASK);
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[3] | 219 |
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[1169] | 220 | if (buttonPressed != 0) {
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[1911] | 221 | if (mousePosStart == null) {
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[1169] | 222 | mousePosStart = mousePos = e.getPoint();
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[1911] | 223 | }
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[8550] | 224 | selectionAreaChanged();
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[1169] | 225 | }
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[7] | 226 |
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[1169] | 227 | if (buttonPressed == MouseEvent.BUTTON1_DOWN_MASK) {
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| 228 | mousePos = e.getPoint();
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[8550] | 229 | addLassoPoint(e.getPoint());
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| 230 | selectionAreaChanged();
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[1169] | 231 | } else if (buttonPressed == (MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON3_DOWN_MASK)) {
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[8550] | 232 | moveSelection(e.getX()-mousePos.x, e.getY()-mousePos.y);
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[1169] | 233 | mousePos = e.getPoint();
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[8550] | 234 | selectionAreaChanged();
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[1169] | 235 | }
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| 236 | }
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[3] | 237 |
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[1169] | 238 | /**
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[8550] | 239 | * Moves the current selection by some pixels.
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| 240 | * @param dx How much to move it in x direction.
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| 241 | * @param dy How much to move it in y direction.
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| 242 | */
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| 243 | private void moveSelection(int dx, int dy) {
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| 244 | mousePosStart.x += dx;
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| 245 | mousePosStart.y += dy;
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| 246 | lasso.translate(dx, dy);
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| 247 | }
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| 248 |
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| 249 | /**
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[1169] | 250 | * Check the state of the keys and buttons and set the selection accordingly.
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| 251 | */
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[6084] | 252 | @Override
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[1169] | 253 | public void mouseReleased(MouseEvent e) {
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[8550] | 254 | if (e.getButton() == MouseEvent.BUTTON1) {
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| 255 | endSelecting(e);
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[5152] | 256 | }
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[1169] | 257 | }
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[3] | 258 |
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[1169] | 259 | /**
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[8550] | 260 | * Ends the selection of the current area. This simulates a release of mouse button 1.
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| 261 | * @param e A mouse event that caused this. Needed for backward compatibility.
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[1169] | 262 | */
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[8550] | 263 | public void endSelecting(MouseEvent e) {
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| 264 | mousePos = e.getPoint();
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| 265 | if (lassoMode) {
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| 266 | addLassoPoint(e.getPoint());
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| 267 | }
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| 268 |
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| 269 | // Left mouse was released while right is still pressed.
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| 270 | boolean rightMouseStillPressed = (e.getModifiersEx() & MouseEvent.BUTTON3_DOWN_MASK) != 0;
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| 271 |
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| 272 | if (!rightMouseStillPressed) {
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| 273 | selectingDone(e);
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| 274 | }
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| 275 | abortSelecting();
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[1169] | 276 | }
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[6070] | 277 |
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[8550] | 278 | private void addLassoPoint(Point point) {
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| 279 | if (isNoSelection()) {
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[5152] | 280 | return;
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| 281 | }
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[8550] | 282 | lasso.addPoint(point.x, point.y);
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[5152] | 283 | }
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| 284 |
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[8550] | 285 | private boolean isNoSelection() {
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| 286 | return mousePos == null || mousePosStart == null || mousePos == mousePosStart;
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| 287 | }
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| 288 |
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[1169] | 289 | /**
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| 290 | * Calculate and return the current selection rectangle
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| 291 | * @return A rectangle that spans from mousePos to mouseStartPos
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| 292 | */
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| 293 | private Rectangle getSelectionRectangle() {
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| 294 | int x = mousePosStart.x;
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| 295 | int y = mousePosStart.y;
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| 296 | int w = mousePos.x - mousePosStart.x;
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| 297 | int h = mousePos.y - mousePosStart.y;
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| 298 | if (w < 0) {
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| 299 | x += w;
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| 300 | w = -w;
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| 301 | }
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| 302 | if (h < 0) {
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| 303 | y += h;
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| 304 | h = -h;
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| 305 | }
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[7] | 306 |
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[1169] | 307 | if (aspectRatio) {
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| 308 | /* Keep the aspect ratio by growing the rectangle; the
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| 309 | * rectangle is always under the cursor. */
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[8510] | 310 | double aspectRatio = (double) nc.getWidth()/nc.getHeight();
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| 311 | if ((double) w/h < aspectRatio) {
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| 312 | int neww = (int) (h*aspectRatio);
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[1911] | 313 | if (mousePos.x < mousePosStart.x) {
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[1169] | 314 | x += w - neww;
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[1911] | 315 | }
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[1169] | 316 | w = neww;
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| 317 | } else {
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[8510] | 318 | int newh = (int) (w/aspectRatio);
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[1911] | 319 | if (mousePos.y < mousePosStart.y) {
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[1169] | 320 | y += h - newh;
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[1911] | 321 | }
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[1169] | 322 | h = newh;
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| 323 | }
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| 324 | }
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| 325 |
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[8510] | 326 | return new Rectangle(x, y, w, h);
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[1169] | 327 | }
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| 328 |
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| 329 | /**
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| 330 | * If the action goes inactive, remove the selection rectangle from screen
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| 331 | */
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[6084] | 332 | @Override
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[1169] | 333 | public void propertyChange(PropertyChangeEvent evt) {
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[8557] | 334 | if ("active".equals(evt.getPropertyName()) && !(Boolean) evt.getNewValue()) {
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[8550] | 335 | abortSelecting();
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[1169] | 336 | }
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| 337 | }
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| 338 |
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| 339 | /**
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[8557] | 340 | * Stores the current selection and stores the result in {@link #selectionResult} to be retrieved by
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| 341 | * {@link #getSelectedObjects(boolean)} later.
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[8550] | 342 | * @param e The mouse event that caused the selection to be finished.
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| 343 | */
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| 344 | private void selectingDone(MouseEvent e) {
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| 345 | if (isNoSelection()) {
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| 346 | // Nothing selected.
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| 347 | return;
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| 348 | }
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| 349 | Rectangle r;
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| 350 | if (lassoMode) {
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| 351 | r = lasso.getBounds();
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| 352 |
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| 353 | selectionResult = new Polygon(lasso.xpoints, lasso.ypoints, lasso.npoints);
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| 354 | } else {
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| 355 | r = getSelectionRectangle();
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| 356 |
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| 357 | selectionResult = rectToPolygon(r);
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| 358 | }
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| 359 | selectionEndedListener.selectionEnded(r, e);
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| 360 | }
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| 361 |
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| 362 | private void abortSelecting() {
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| 363 | if (mousePosStart != null) {
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| 364 | mousePos = mousePosStart = null;
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| 365 | lasso.reset();
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| 366 | selectionAreaChanged();
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| 367 | }
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| 368 | }
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| 369 |
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[8870] | 370 | private static void selectionAreaChanged() {
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[8550] | 371 | // Trigger a redraw of the map view.
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| 372 | // A nicer way would be to provide change events for the temporary layer.
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| 373 | Main.map.mapView.repaint();
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| 374 | }
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| 375 |
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| 376 | /**
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| 377 | * Return a list of all objects in the active/last selection, respecting the different
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[1169] | 378 | * modifier.
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[5152] | 379 | *
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| 380 | * @param alt Whether the alt key was pressed, which means select all
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| 381 | * objects that are touched, instead those which are completely covered.
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[5500] | 382 | * @return The collection of selected objects.
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[1169] | 383 | */
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[5152] | 384 | public Collection<OsmPrimitive> getSelectedObjects(boolean alt) {
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| 385 |
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[7005] | 386 | Collection<OsmPrimitive> selection = new LinkedList<>();
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[1169] | 387 |
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| 388 | // whether user only clicked, not dragged.
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[5152] | 389 | boolean clicked = false;
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[8550] | 390 | Rectangle bounding = selectionResult.getBounds();
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[5152] | 391 | if (bounding.height <= 2 && bounding.width <= 2) {
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| 392 | clicked = true;
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| 393 | }
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[1169] | 394 |
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| 395 | if (clicked) {
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[8550] | 396 | Point center = new Point(selectionResult.xpoints[0], selectionResult.ypoints[0]);
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[3642] | 397 | OsmPrimitive osm = nc.getNearestNodeOrWay(center, OsmPrimitive.isSelectablePredicate, false);
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[1911] | 398 | if (osm != null) {
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[1169] | 399 | selection.add(osm);
|
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[1911] | 400 | }
|
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[1169] | 401 | } else {
|
---|
| 402 | // nodes
|
---|
[2381] | 403 | for (Node n : nc.getCurrentDataSet().getNodes()) {
|
---|
[8550] | 404 | if (n.isSelectable() && selectionResult.contains(nc.getPoint2D(n))) {
|
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[1169] | 405 | selection.add(n);
|
---|
[1911] | 406 | }
|
---|
[1169] | 407 | }
|
---|
| 408 |
|
---|
| 409 | // ways
|
---|
[2381] | 410 | for (Way w : nc.getCurrentDataSet().getWays()) {
|
---|
[3198] | 411 | if (!w.isSelectable() || w.getNodesCount() == 0) {
|
---|
[1911] | 412 | continue;
|
---|
| 413 | }
|
---|
[1169] | 414 | if (alt) {
|
---|
[1910] | 415 | for (Node n : w.getNodes()) {
|
---|
[8550] | 416 | if (!n.isIncomplete() && selectionResult.contains(nc.getPoint2D(n))) {
|
---|
[1169] | 417 | selection.add(w);
|
---|
| 418 | break;
|
---|
| 419 | }
|
---|
| 420 | }
|
---|
| 421 | } else {
|
---|
| 422 | boolean allIn = true;
|
---|
[1910] | 423 | for (Node n : w.getNodes()) {
|
---|
[8550] | 424 | if (!n.isIncomplete() && !selectionResult.contains(nc.getPoint(n))) {
|
---|
[1169] | 425 | allIn = false;
|
---|
| 426 | break;
|
---|
| 427 | }
|
---|
| 428 | }
|
---|
[1911] | 429 | if (allIn) {
|
---|
| 430 | selection.add(w);
|
---|
| 431 | }
|
---|
[1169] | 432 | }
|
---|
| 433 | }
|
---|
| 434 | }
|
---|
| 435 | return selection;
|
---|
| 436 | }
|
---|
| 437 |
|
---|
[8870] | 438 | private static Polygon rectToPolygon(Rectangle r) {
|
---|
[5152] | 439 | Polygon poly = new Polygon();
|
---|
| 440 |
|
---|
| 441 | poly.addPoint(r.x, r.y);
|
---|
| 442 | poly.addPoint(r.x, r.y + r.height);
|
---|
| 443 | poly.addPoint(r.x + r.width, r.y + r.height);
|
---|
| 444 | poly.addPoint(r.x + r.width, r.y);
|
---|
| 445 |
|
---|
| 446 | return poly;
|
---|
| 447 | }
|
---|
| 448 |
|
---|
[5500] | 449 | /**
|
---|
| 450 | * Enables or disables the lasso mode.
|
---|
| 451 | * @param lassoMode {@code true} to enable lasso mode, {@code false} to disable it.
|
---|
| 452 | */
|
---|
[5152] | 453 | public void setLassoMode(boolean lassoMode) {
|
---|
| 454 | this.lassoMode = lassoMode;
|
---|
| 455 | }
|
---|
| 456 |
|
---|
[6084] | 457 | @Override
|
---|
[1169] | 458 | public void mouseClicked(MouseEvent e) {}
|
---|
[8510] | 459 |
|
---|
[6084] | 460 | @Override
|
---|
[1169] | 461 | public void mouseEntered(MouseEvent e) {}
|
---|
[8510] | 462 |
|
---|
[6084] | 463 | @Override
|
---|
[1169] | 464 | public void mouseExited(MouseEvent e) {}
|
---|
[8510] | 465 |
|
---|
[6084] | 466 | @Override
|
---|
[1169] | 467 | public void mouseMoved(MouseEvent e) {}
|
---|
[3] | 468 | }
|
---|