[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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[11945] | 18 | import javax.swing.Action;
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| 19 |
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[7146] | 20 | import org.openstreetmap.josm.actions.SelectByInternalPointAction;
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[8550] | 21 | import org.openstreetmap.josm.data.Bounds;
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[12961] | 22 | import org.openstreetmap.josm.data.osm.DataSet;
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[7] | 23 | import org.openstreetmap.josm.data.osm.Node;
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| 24 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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[64] | 25 | import org.openstreetmap.josm.data.osm.Way;
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[8550] | 26 | import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
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[10031] | 27 | import org.openstreetmap.josm.gui.layer.AbstractMapViewPaintable;
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[8550] | 28 | import org.openstreetmap.josm.tools.Utils;
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[7] | 29 |
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[3] | 30 | /**
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[8550] | 31 | * Manages the selection of a rectangle or a lasso loop. Listening to left and right mouse button
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[3] | 32 | * presses and to mouse motions and draw the rectangle accordingly.
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[1169] | 33 | *
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[3] | 34 | * Left mouse button selects a rectangle from the press until release. Pressing
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[8550] | 35 | * right mouse button while left is still pressed enable the selection area to move
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[3] | 36 | * around. Releasing the left button fires an action event to the listener given
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| 37 | * at constructor, except if the right is still pressed, which just remove the
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| 38 | * selection rectangle and does nothing.
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[1169] | 39 | *
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[8550] | 40 | * It is possible to switch between lasso selection and rectangle selection by using {@link #setLassoMode(boolean)}.
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| 41 | *
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[1169] | 42 | * The point where the left mouse button was pressed and the current mouse
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[3] | 43 | * position are two opposite corners of the selection rectangle.
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[1169] | 44 | *
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[8550] | 45 | * For rectangle mode, it is possible to specify an aspect ratio (width per height) which the
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[3] | 46 | * selection rectangle always must have. In this case, the selection rectangle
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| 47 | * will be the largest window with this aspect ratio, where the position the left
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[1169] | 48 | * mouse button was pressed and the corner of the current mouse position are at
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[3] | 49 | * opposite sites (the mouse position corner is the corner nearest to the mouse
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[1169] | 50 | * cursor).
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| 51 | *
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| 52 | * When the left mouse button was released, an ActionEvent is send to the
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[3] | 53 | * ActionListener given at constructor. The source of this event is this manager.
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[1169] | 54 | *
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[3] | 55 | * @author imi
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| 56 | */
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[7] | 57 | public class SelectionManager implements MouseListener, MouseMotionListener, PropertyChangeListener {
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[3] | 58 |
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[1169] | 59 | /**
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| 60 | * This is the interface that an user of SelectionManager has to implement
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| 61 | * to get informed when a selection closes.
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| 62 | * @author imi
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| 63 | */
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[11945] | 64 | public interface SelectionEnded extends Action {
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[1169] | 65 | /**
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| 66 | * Called, when the left mouse button was released.
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[8550] | 67 | * @param r The rectangle that encloses the current selection.
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[5500] | 68 | * @param e The mouse event.
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[1169] | 69 | * @see InputEvent#getModifiersEx()
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[8550] | 70 | * @see SelectionManager#getSelectedObjects(boolean)
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[1169] | 71 | */
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[8512] | 72 | void selectionEnded(Rectangle r, MouseEvent e);
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[1169] | 73 | }
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[8550] | 74 |
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[1169] | 75 | /**
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[8550] | 76 | * This draws the selection hint (rectangle or lasso polygon) on the screen.
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| 77 | *
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| 78 | * @author Michael Zangl
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| 79 | */
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[10031] | 80 | private class SelectionHintLayer extends AbstractMapViewPaintable {
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[8550] | 81 | @Override
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| 82 | public void paint(Graphics2D g, MapView mv, Bounds bbox) {
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[10661] | 83 | if (mousePos == null || mousePosStart == null || mousePos == mousePosStart)
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[8550] | 84 | return;
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| 85 | Color color = Utils.complement(PaintColors.getBackgroundColor());
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| 86 | g.setColor(color);
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| 87 | if (lassoMode) {
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| 88 | g.drawPolygon(lasso);
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| 89 |
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| 90 | g.setColor(new Color(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha() / 8));
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| 91 | g.fillPolygon(lasso);
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| 92 | } else {
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| 93 | Rectangle paintRect = getSelectionRectangle();
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| 94 | g.drawRect(paintRect.x, paintRect.y, paintRect.width, paintRect.height);
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| 95 | }
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| 96 | }
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| 97 | }
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| 98 |
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| 99 | /**
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[1169] | 100 | * The listener that receives the events after left mouse button is released.
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| 101 | */
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| 102 | private final SelectionEnded selectionEndedListener;
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| 103 | /**
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| 104 | * Position of the map when the mouse button was pressed.
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[8550] | 105 | * If this is not <code>null</code>, a rectangle/lasso line is drawn on screen.
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| 106 | * If this is <code>null</code>, no selection is active.
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[1169] | 107 | */
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| 108 | private Point mousePosStart;
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| 109 | /**
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[8550] | 110 | * The last position of the mouse while the mouse button was pressed.
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[1169] | 111 | */
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| 112 | private Point mousePos;
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| 113 | /**
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[8550] | 114 | * The Component that provides us with OSM data and the aspect is taken from.
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[1169] | 115 | */
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| 116 | private final NavigatableComponent nc;
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| 117 | /**
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[9078] | 118 | * Whether the selection rectangle must obtain the aspect ratio of the drawComponent.
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[1169] | 119 | */
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[9078] | 120 | private final boolean aspectRatio;
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[3] | 121 |
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[8550] | 122 | /**
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| 123 | * <code>true</code> if we should paint a lasso instead of a rectangle.
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| 124 | */
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[5152] | 125 | private boolean lassoMode;
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[8550] | 126 | /**
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| 127 | * The polygon to store the selection outline if {@link #lassoMode} is used.
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| 128 | */
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[9078] | 129 | private final Polygon lasso = new Polygon();
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[5152] | 130 |
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[1169] | 131 | /**
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[8550] | 132 | * The result of the last selection.
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| 133 | */
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| 134 | private Polygon selectionResult = new Polygon();
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| 135 |
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| 136 | private final SelectionHintLayer selectionHintLayer = new SelectionHintLayer();
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| 137 |
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| 138 | /**
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[1169] | 139 | * Create a new SelectionManager.
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| 140 | *
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| 141 | * @param selectionEndedListener The action listener that receives the event when
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| 142 | * the left button is released.
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| 143 | * @param aspectRatio If true, the selection window must obtain the aspect
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| 144 | * ratio of the drawComponent.
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[8550] | 145 | * @param navComp The component that provides us with OSM data and the aspect is taken from.
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[1169] | 146 | */
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| 147 | public SelectionManager(SelectionEnded selectionEndedListener, boolean aspectRatio, NavigatableComponent navComp) {
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| 148 | this.selectionEndedListener = selectionEndedListener;
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| 149 | this.aspectRatio = aspectRatio;
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| 150 | this.nc = navComp;
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| 151 | }
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| 152 |
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| 153 | /**
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[8550] | 154 | * Register itself at the given event source and add a hint layer.
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[1169] | 155 | * @param eventSource The emitter of the mouse events.
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[5500] | 156 | * @param lassoMode {@code true} to enable lasso mode, {@code false} to disable it.
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[1169] | 157 | */
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[8550] | 158 | public void register(MapView eventSource, boolean lassoMode) {
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[5152] | 159 | this.lassoMode = lassoMode;
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[1169] | 160 | eventSource.addMouseListener(this);
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| 161 | eventSource.addMouseMotionListener(this);
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| 162 | selectionEndedListener.addPropertyChangeListener(this);
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[10611] | 163 | eventSource.addPropertyChangeListener("scale", evt -> abortSelecting());
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[8550] | 164 | eventSource.addTemporaryLayer(selectionHintLayer);
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[1169] | 165 | }
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[9059] | 166 |
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[1169] | 167 | /**
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[8550] | 168 | * Unregister itself from the given event source and hide the selection hint layer.
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[1169] | 169 | *
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| 170 | * @param eventSource The emitter of the mouse events.
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| 171 | */
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[8550] | 172 | public void unregister(MapView eventSource) {
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| 173 | abortSelecting();
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| 174 | eventSource.removeTemporaryLayer(selectionHintLayer);
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[1169] | 175 | eventSource.removeMouseListener(this);
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| 176 | eventSource.removeMouseMotionListener(this);
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| 177 | selectionEndedListener.removePropertyChangeListener(this);
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| 178 | }
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[3] | 179 |
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[1169] | 180 | /**
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| 181 | * If the correct button, from the "drawing rectangle" mode
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| 182 | */
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[6084] | 183 | @Override
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[1169] | 184 | public void mousePressed(MouseEvent e) {
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[13434] | 185 | if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() > 1 && MainApplication.getLayerManager().getActiveDataSet() != null) {
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[12630] | 186 | SelectByInternalPointAction.performSelection(MainApplication.getMap().mapView.getEastNorth(e.getX(), e.getY()),
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[10244] | 187 | (e.getModifiersEx() & MouseEvent.SHIFT_DOWN_MASK) != 0,
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| 188 | (e.getModifiersEx() & MouseEvent.CTRL_DOWN_MASK) != 0);
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[7144] | 189 | } else if (e.getButton() == MouseEvent.BUTTON1) {
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[1169] | 190 | mousePosStart = mousePos = e.getPoint();
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[5152] | 191 |
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| 192 | lasso.reset();
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| 193 | lasso.addPoint(mousePosStart.x, mousePosStart.y);
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[1911] | 194 | }
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[1169] | 195 | }
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[3] | 196 |
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[1169] | 197 | /**
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| 198 | * If the correct button is hold, draw the rectangle.
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| 199 | */
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[6084] | 200 | @Override
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[1169] | 201 | public void mouseDragged(MouseEvent e) {
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| 202 | int buttonPressed = e.getModifiersEx() & (MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON3_DOWN_MASK);
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[3] | 203 |
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[1169] | 204 | if (buttonPressed != 0) {
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[1911] | 205 | if (mousePosStart == null) {
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[1169] | 206 | mousePosStart = mousePos = e.getPoint();
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[1911] | 207 | }
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[8550] | 208 | selectionAreaChanged();
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[1169] | 209 | }
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[7] | 210 |
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[1169] | 211 | if (buttonPressed == MouseEvent.BUTTON1_DOWN_MASK) {
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| 212 | mousePos = e.getPoint();
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[8550] | 213 | addLassoPoint(e.getPoint());
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| 214 | selectionAreaChanged();
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[1169] | 215 | } else if (buttonPressed == (MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON3_DOWN_MASK)) {
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[8550] | 216 | moveSelection(e.getX()-mousePos.x, e.getY()-mousePos.y);
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[1169] | 217 | mousePos = e.getPoint();
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[8550] | 218 | selectionAreaChanged();
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[1169] | 219 | }
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| 220 | }
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[3] | 221 |
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[1169] | 222 | /**
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[8550] | 223 | * Moves the current selection by some pixels.
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| 224 | * @param dx How much to move it in x direction.
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| 225 | * @param dy How much to move it in y direction.
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| 226 | */
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| 227 | private void moveSelection(int dx, int dy) {
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| 228 | mousePosStart.x += dx;
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| 229 | mousePosStart.y += dy;
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| 230 | lasso.translate(dx, dy);
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| 231 | }
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| 232 |
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| 233 | /**
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[1169] | 234 | * Check the state of the keys and buttons and set the selection accordingly.
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| 235 | */
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[6084] | 236 | @Override
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[1169] | 237 | public void mouseReleased(MouseEvent e) {
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[8550] | 238 | if (e.getButton() == MouseEvent.BUTTON1) {
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| 239 | endSelecting(e);
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[5152] | 240 | }
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[1169] | 241 | }
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[3] | 242 |
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[1169] | 243 | /**
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[8550] | 244 | * Ends the selection of the current area. This simulates a release of mouse button 1.
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| 245 | * @param e A mouse event that caused this. Needed for backward compatibility.
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[1169] | 246 | */
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[8550] | 247 | public void endSelecting(MouseEvent e) {
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| 248 | mousePos = e.getPoint();
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| 249 | if (lassoMode) {
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| 250 | addLassoPoint(e.getPoint());
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| 251 | }
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| 252 |
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| 253 | // Left mouse was released while right is still pressed.
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| 254 | boolean rightMouseStillPressed = (e.getModifiersEx() & MouseEvent.BUTTON3_DOWN_MASK) != 0;
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| 255 |
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| 256 | if (!rightMouseStillPressed) {
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| 257 | selectingDone(e);
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| 258 | }
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| 259 | abortSelecting();
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[1169] | 260 | }
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[6070] | 261 |
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[8550] | 262 | private void addLassoPoint(Point point) {
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| 263 | if (isNoSelection()) {
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[5152] | 264 | return;
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| 265 | }
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[8550] | 266 | lasso.addPoint(point.x, point.y);
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[5152] | 267 | }
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| 268 |
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[8550] | 269 | private boolean isNoSelection() {
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[10661] | 270 | return mousePos == null || mousePosStart == null || mousePos == mousePosStart;
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[8550] | 271 | }
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| 272 |
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[1169] | 273 | /**
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| 274 | * Calculate and return the current selection rectangle
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| 275 | * @return A rectangle that spans from mousePos to mouseStartPos
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| 276 | */
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| 277 | private Rectangle getSelectionRectangle() {
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| 278 | int x = mousePosStart.x;
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| 279 | int y = mousePosStart.y;
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| 280 | int w = mousePos.x - mousePosStart.x;
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| 281 | int h = mousePos.y - mousePosStart.y;
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| 282 | if (w < 0) {
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| 283 | x += w;
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| 284 | w = -w;
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| 285 | }
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| 286 | if (h < 0) {
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| 287 | y += h;
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| 288 | h = -h;
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| 289 | }
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[7] | 290 |
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[1169] | 291 | if (aspectRatio) {
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| 292 | /* Keep the aspect ratio by growing the rectangle; the
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| 293 | * rectangle is always under the cursor. */
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[8510] | 294 | double aspectRatio = (double) nc.getWidth()/nc.getHeight();
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| 295 | if ((double) w/h < aspectRatio) {
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| 296 | int neww = (int) (h*aspectRatio);
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[1911] | 297 | if (mousePos.x < mousePosStart.x) {
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[1169] | 298 | x += w - neww;
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[1911] | 299 | }
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[1169] | 300 | w = neww;
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| 301 | } else {
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[8510] | 302 | int newh = (int) (w/aspectRatio);
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[1911] | 303 | if (mousePos.y < mousePosStart.y) {
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[1169] | 304 | y += h - newh;
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[1911] | 305 | }
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[1169] | 306 | h = newh;
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| 307 | }
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| 308 | }
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| 309 |
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[8510] | 310 | return new Rectangle(x, y, w, h);
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[1169] | 311 | }
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| 312 |
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| 313 | /**
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| 314 | * If the action goes inactive, remove the selection rectangle from screen
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| 315 | */
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[6084] | 316 | @Override
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[1169] | 317 | public void propertyChange(PropertyChangeEvent evt) {
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[8557] | 318 | if ("active".equals(evt.getPropertyName()) && !(Boolean) evt.getNewValue()) {
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[8550] | 319 | abortSelecting();
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[1169] | 320 | }
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| 321 | }
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| 322 |
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| 323 | /**
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[8557] | 324 | * Stores the current selection and stores the result in {@link #selectionResult} to be retrieved by
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| 325 | * {@link #getSelectedObjects(boolean)} later.
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[8550] | 326 | * @param e The mouse event that caused the selection to be finished.
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| 327 | */
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| 328 | private void selectingDone(MouseEvent e) {
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| 329 | if (isNoSelection()) {
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| 330 | // Nothing selected.
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| 331 | return;
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| 332 | }
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| 333 | Rectangle r;
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| 334 | if (lassoMode) {
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| 335 | r = lasso.getBounds();
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| 336 |
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| 337 | selectionResult = new Polygon(lasso.xpoints, lasso.ypoints, lasso.npoints);
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| 338 | } else {
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| 339 | r = getSelectionRectangle();
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| 340 |
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| 341 | selectionResult = rectToPolygon(r);
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| 342 | }
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| 343 | selectionEndedListener.selectionEnded(r, e);
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| 344 | }
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| 345 |
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| 346 | private void abortSelecting() {
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| 347 | if (mousePosStart != null) {
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| 348 | mousePos = mousePosStart = null;
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| 349 | lasso.reset();
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| 350 | selectionAreaChanged();
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| 351 | }
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| 352 | }
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| 353 |
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[10031] | 354 | private void selectionAreaChanged() {
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| 355 | selectionHintLayer.invalidate();
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[8550] | 356 | }
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| 357 |
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| 358 | /**
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| 359 | * Return a list of all objects in the active/last selection, respecting the different
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[1169] | 360 | * modifier.
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[5152] | 361 | *
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| 362 | * @param alt Whether the alt key was pressed, which means select all
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| 363 | * objects that are touched, instead those which are completely covered.
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[5500] | 364 | * @return The collection of selected objects.
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[1169] | 365 | */
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[5152] | 366 | public Collection<OsmPrimitive> getSelectedObjects(boolean alt) {
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[7005] | 367 | Collection<OsmPrimitive> selection = new LinkedList<>();
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[1169] | 368 |
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| 369 | // whether user only clicked, not dragged.
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[5152] | 370 | boolean clicked = false;
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[8550] | 371 | Rectangle bounding = selectionResult.getBounds();
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[5152] | 372 | if (bounding.height <= 2 && bounding.width <= 2) {
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| 373 | clicked = true;
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| 374 | }
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[1169] | 375 |
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[13434] | 376 | DataSet ds = MainApplication.getLayerManager().getActiveDataSet();
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[1169] | 377 | if (clicked) {
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[8550] | 378 | Point center = new Point(selectionResult.xpoints[0], selectionResult.ypoints[0]);
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[10716] | 379 | OsmPrimitive osm = nc.getNearestNodeOrWay(center, OsmPrimitive::isSelectable, false);
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[1911] | 380 | if (osm != null) {
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[1169] | 381 | selection.add(osm);
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[1911] | 382 | }
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[12961] | 383 | } else if (ds != null) {
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[1169] | 384 | // nodes
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[12961] | 385 | for (Node n : ds.getNodes()) {
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[8550] | 386 | if (n.isSelectable() && selectionResult.contains(nc.getPoint2D(n))) {
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[1169] | 387 | selection.add(n);
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[1911] | 388 | }
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[1169] | 389 | }
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| 390 |
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| 391 | // ways
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[12961] | 392 | for (Way w : ds.getWays()) {
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[3198] | 393 | if (!w.isSelectable() || w.getNodesCount() == 0) {
|
---|
[1911] | 394 | continue;
|
---|
| 395 | }
|
---|
[1169] | 396 | if (alt) {
|
---|
[1910] | 397 | for (Node n : w.getNodes()) {
|
---|
[8550] | 398 | if (!n.isIncomplete() && selectionResult.contains(nc.getPoint2D(n))) {
|
---|
[1169] | 399 | selection.add(w);
|
---|
| 400 | break;
|
---|
| 401 | }
|
---|
| 402 | }
|
---|
| 403 | } else {
|
---|
| 404 | boolean allIn = true;
|
---|
[1910] | 405 | for (Node n : w.getNodes()) {
|
---|
[8550] | 406 | if (!n.isIncomplete() && !selectionResult.contains(nc.getPoint(n))) {
|
---|
[1169] | 407 | allIn = false;
|
---|
| 408 | break;
|
---|
| 409 | }
|
---|
| 410 | }
|
---|
[1911] | 411 | if (allIn) {
|
---|
| 412 | selection.add(w);
|
---|
| 413 | }
|
---|
[1169] | 414 | }
|
---|
| 415 | }
|
---|
| 416 | }
|
---|
| 417 | return selection;
|
---|
| 418 | }
|
---|
| 419 |
|
---|
[8870] | 420 | private static Polygon rectToPolygon(Rectangle r) {
|
---|
[5152] | 421 | Polygon poly = new Polygon();
|
---|
| 422 |
|
---|
| 423 | poly.addPoint(r.x, r.y);
|
---|
| 424 | poly.addPoint(r.x, r.y + r.height);
|
---|
| 425 | poly.addPoint(r.x + r.width, r.y + r.height);
|
---|
| 426 | poly.addPoint(r.x + r.width, r.y);
|
---|
| 427 |
|
---|
| 428 | return poly;
|
---|
| 429 | }
|
---|
| 430 |
|
---|
[5500] | 431 | /**
|
---|
| 432 | * Enables or disables the lasso mode.
|
---|
| 433 | * @param lassoMode {@code true} to enable lasso mode, {@code false} to disable it.
|
---|
| 434 | */
|
---|
[5152] | 435 | public void setLassoMode(boolean lassoMode) {
|
---|
| 436 | this.lassoMode = lassoMode;
|
---|
| 437 | }
|
---|
| 438 |
|
---|
[6084] | 439 | @Override
|
---|
[10173] | 440 | public void mouseClicked(MouseEvent e) {
|
---|
| 441 | // Do nothing
|
---|
| 442 | }
|
---|
[8510] | 443 |
|
---|
[6084] | 444 | @Override
|
---|
[10173] | 445 | public void mouseEntered(MouseEvent e) {
|
---|
| 446 | // Do nothing
|
---|
| 447 | }
|
---|
[8510] | 448 |
|
---|
[6084] | 449 | @Override
|
---|
[10173] | 450 | public void mouseExited(MouseEvent e) {
|
---|
| 451 | // Do nothing
|
---|
| 452 | }
|
---|
[8510] | 453 |
|
---|
[6084] | 454 | @Override
|
---|
[10173] | 455 | public void mouseMoved(MouseEvent e) {
|
---|
| 456 | // Do nothing
|
---|
| 457 | }
|
---|
[3] | 458 | }
|
---|