| 1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others |
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| 2 | package org.openstreetmap.josm.gui; |
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| 3 | |
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| 4 | import static org.openstreetmap.josm.tools.I18n.tr; |
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| 5 | |
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| 6 | import java.awt.Cursor; |
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| 7 | import java.awt.Point; |
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| 8 | import java.awt.event.ActionEvent; |
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| 9 | import java.awt.event.KeyEvent; |
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| 10 | import java.awt.event.MouseAdapter; |
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| 11 | import java.awt.event.MouseEvent; |
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| 12 | import java.awt.event.MouseMotionListener; |
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| 13 | import java.awt.event.MouseWheelEvent; |
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| 14 | import java.awt.event.MouseWheelListener; |
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| 15 | |
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| 16 | import javax.swing.AbstractAction; |
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| 17 | import javax.swing.JComponent; |
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| 18 | import javax.swing.JPanel; |
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| 19 | |
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| 20 | import org.openstreetmap.josm.Main; |
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| 21 | import org.openstreetmap.josm.data.coor.EastNorth; |
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| 22 | import org.openstreetmap.josm.tools.PlatformHookOsx; |
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| 23 | import org.openstreetmap.josm.tools.Shortcut; |
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| 24 | |
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| 25 | /** |
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| 26 | * Enables moving of the map by holding down the right mouse button and drag |
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| 27 | * the mouse. Also, enables zooming by the mouse wheel. |
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| 28 | * |
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| 29 | * @author imi |
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| 30 | */ |
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| 31 | public class MapMover extends MouseAdapter implements MouseMotionListener, MouseWheelListener { |
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| 32 | |
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| 33 | private final class ZoomerAction extends AbstractAction { |
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| 34 | private final String action; |
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| 35 | public ZoomerAction(String action) { |
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| 36 | this.action = action; |
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| 37 | } |
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| 38 | public void actionPerformed(ActionEvent e) { |
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| 39 | if (action.equals(".") || action.equals(",")) { |
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| 40 | Point mouse = nc.getMousePosition(); |
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| 41 | if (mouse == null) |
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| 42 | mouse = new Point((int)nc.getBounds().getCenterX(), (int)nc.getBounds().getCenterY()); |
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| 43 | MouseWheelEvent we = new MouseWheelEvent(nc, e.getID(), e.getWhen(), e.getModifiers(), mouse.x, mouse.y, 0, false, MouseWheelEvent.WHEEL_UNIT_SCROLL, 1, action.equals(",") ? -1 : 1); |
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| 44 | mouseWheelMoved(we); |
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| 45 | } else { |
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| 46 | EastNorth center = nc.getCenter(); |
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| 47 | EastNorth newcenter = nc.getEastNorth(nc.getWidth()/2+nc.getWidth()/5, nc.getHeight()/2+nc.getHeight()/5); |
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| 48 | if (action.equals("left")) |
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| 49 | nc.zoomTo(new EastNorth(2*center.east()-newcenter.east(), center.north())); |
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| 50 | else if (action.equals("right")) |
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| 51 | nc.zoomTo(new EastNorth(newcenter.east(), center.north())); |
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| 52 | else if (action.equals("up")) |
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| 53 | nc.zoomTo(new EastNorth(center.east(), 2*center.north()-newcenter.north())); |
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| 54 | else if (action.equals("down")) |
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| 55 | nc.zoomTo(new EastNorth(center.east(), newcenter.north())); |
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| 56 | } |
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| 57 | } |
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| 58 | } |
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| 59 | |
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| 60 | /** |
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| 61 | * The point in the map that was the under the mouse point |
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| 62 | * when moving around started. |
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| 63 | */ |
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| 64 | private EastNorth mousePosMove; |
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| 65 | /** |
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| 66 | * The map to move around. |
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| 67 | */ |
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| 68 | private final NavigatableComponent nc; |
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| 69 | |
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| 70 | private boolean movementInPlace = false; |
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| 71 | |
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| 72 | /** |
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| 73 | * Create a new MapMover |
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| 74 | */ |
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| 75 | public MapMover(NavigatableComponent navComp, JPanel contentPane) { |
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| 76 | this.nc = navComp; |
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| 77 | nc.addMouseListener(this); |
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| 78 | nc.addMouseMotionListener(this); |
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| 79 | nc.addMouseWheelListener(this); |
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| 80 | |
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| 81 | if (contentPane != null) { |
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| 82 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( |
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| 83 | Shortcut.registerShortcut("system:movefocusright", tr("Map: {0}", tr("Move right")), KeyEvent.VK_RIGHT, Shortcut.CTRL).getKeyStroke(), |
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| 84 | "MapMover.Zoomer.right"); |
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| 85 | contentPane.getActionMap().put("MapMover.Zoomer.right", new ZoomerAction("right")); |
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| 86 | |
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| 87 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( |
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| 88 | Shortcut.registerShortcut("system:movefocusleft", tr("Map: {0}", tr("Move left")), KeyEvent.VK_LEFT, Shortcut.CTRL).getKeyStroke(), |
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| 89 | "MapMover.Zoomer.left"); |
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| 90 | contentPane.getActionMap().put("MapMover.Zoomer.left", new ZoomerAction("left")); |
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| 91 | |
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| 92 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( |
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| 93 | Shortcut.registerShortcut("system:movefocusup", tr("Map: {0}", tr("Move up")), KeyEvent.VK_UP, Shortcut.CTRL).getKeyStroke(), |
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| 94 | "MapMover.Zoomer.up"); |
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| 95 | contentPane.getActionMap().put("MapMover.Zoomer.up", new ZoomerAction("up")); |
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| 96 | |
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| 97 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( |
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| 98 | Shortcut.registerShortcut("system:movefocusdown", tr("Map: {0}", tr("Move down")), KeyEvent.VK_DOWN, Shortcut.CTRL).getKeyStroke(), |
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| 99 | "MapMover.Zoomer.down"); |
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| 100 | contentPane.getActionMap().put("MapMover.Zoomer.down", new ZoomerAction("down")); |
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| 101 | |
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| 102 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( |
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| 103 | Shortcut.registerShortcut("view:zoominalternate", tr("Map: {0}", tr("Zoom in")), KeyEvent.VK_COMMA, Shortcut.CTRL).getKeyStroke(), |
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| 104 | "MapMover.Zoomer.in"); |
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| 105 | contentPane.getActionMap().put("MapMover.Zoomer.in", new ZoomerAction(",")); |
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| 106 | |
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| 107 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( |
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| 108 | Shortcut.registerShortcut("view:zoomoutalternate", tr("Map: {0}", tr("Zoom out")), KeyEvent.VK_PERIOD, Shortcut.CTRL).getKeyStroke(), |
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| 109 | "MapMover.Zoomer.out"); |
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| 110 | contentPane.getActionMap().put("MapMover.Zoomer.out", new ZoomerAction(".")); |
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| 111 | } |
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| 112 | } |
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| 113 | |
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| 114 | /** |
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| 115 | * If the right (and only the right) mouse button is pressed, move the map |
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| 116 | */ |
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| 117 | public void mouseDragged(MouseEvent e) { |
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| 118 | int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK; |
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| 119 | if ((e.getModifiersEx() & (MouseEvent.BUTTON3_DOWN_MASK | offMask)) == MouseEvent.BUTTON3_DOWN_MASK) { |
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| 120 | if (mousePosMove == null) |
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| 121 | startMovement(e); |
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| 122 | EastNorth center = nc.getCenter(); |
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| 123 | EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY()); |
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| 124 | nc.zoomTo(new EastNorth( |
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| 125 | mousePosMove.east() + center.east() - mouseCenter.east(), |
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| 126 | mousePosMove.north() + center.north() - mouseCenter.north())); |
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| 127 | } else |
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| 128 | endMovement(); |
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| 129 | } |
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| 130 | |
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| 131 | /** |
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| 132 | * Start the movement, if it was the 3rd button (right button). |
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| 133 | */ |
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| 134 | @Override public void mousePressed(MouseEvent e) { |
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| 135 | int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK; |
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| 136 | int macMouseMask = MouseEvent.CTRL_DOWN_MASK | MouseEvent.BUTTON1_DOWN_MASK; |
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| 137 | if (e.getButton() == MouseEvent.BUTTON3 && (e.getModifiersEx() & offMask) == 0) { |
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| 138 | startMovement(e); |
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| 139 | } else if (isPlatformOsx() && e.getModifiersEx() == macMouseMask) { |
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| 140 | startMovement(e); |
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| 141 | } |
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| 142 | } |
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| 143 | |
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| 144 | /** |
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| 145 | * Change the cursor back to it's pre-move cursor. |
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| 146 | */ |
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| 147 | @Override public void mouseReleased(MouseEvent e) { |
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| 148 | if (e.getButton() == MouseEvent.BUTTON3) { |
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| 149 | endMovement(); |
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| 150 | } else if (isPlatformOsx() && e.getButton() == MouseEvent.BUTTON1) { |
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| 151 | endMovement(); |
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| 152 | } |
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| 153 | } |
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| 154 | |
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| 155 | /** |
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| 156 | * Start movement by setting a new cursor and remember the current mouse |
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| 157 | * position. |
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| 158 | * @param e The mouse event that leat to the movement from. |
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| 159 | */ |
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| 160 | private void startMovement(MouseEvent e) { |
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| 161 | if (movementInPlace) |
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| 162 | return; |
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| 163 | movementInPlace = true; |
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| 164 | mousePosMove = nc.getEastNorth(e.getX(), e.getY()); |
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| 165 | nc.setNewCursor(Cursor.MOVE_CURSOR, this); |
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| 166 | } |
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| 167 | |
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| 168 | /** |
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| 169 | * End the movement. Setting back the cursor and clear the movement variables |
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| 170 | */ |
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| 171 | private void endMovement() { |
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| 172 | if (!movementInPlace) |
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| 173 | return; |
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| 174 | movementInPlace = false; |
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| 175 | nc.resetCursor(this); |
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| 176 | mousePosMove = null; |
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| 177 | } |
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| 178 | |
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| 179 | /** |
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| 180 | * Zoom the map by 1/5th of current zoom per wheel-delta. |
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| 181 | * @param e The wheel event. |
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| 182 | */ |
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| 183 | public void mouseWheelMoved(MouseWheelEvent e) { |
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| 184 | nc.zoomToFactor(e.getX(), e.getY(), Math.pow(Math.sqrt(2), e.getWheelRotation())); |
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| 185 | } |
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| 186 | |
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| 187 | /** |
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| 188 | * Emulates dragging on Mac OSX |
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| 189 | */ |
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| 190 | public void mouseMoved(MouseEvent e) { |
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| 191 | if (!movementInPlace) |
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| 192 | return; |
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| 193 | // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired. |
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| 194 | // Is only the selected mouse button pressed? |
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| 195 | if (isPlatformOsx()) { |
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| 196 | if (e.getModifiersEx() == MouseEvent.CTRL_DOWN_MASK) { |
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| 197 | if (mousePosMove == null) { |
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| 198 | startMovement(e); |
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| 199 | } |
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| 200 | EastNorth center = nc.getCenter(); |
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| 201 | EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY()); |
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| 202 | nc.zoomTo(new EastNorth(mousePosMove.east() + center.east() - mouseCenter.east(), mousePosMove.north() |
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| 203 | + center.north() - mouseCenter.north())); |
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| 204 | } else { |
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| 205 | endMovement(); |
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| 206 | } |
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| 207 | } |
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| 208 | } |
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| 209 | |
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| 210 | /** |
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| 211 | * Replies true if we are currently running on OSX |
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| 212 | * |
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| 213 | * @return true if we are currently running on OSX |
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| 214 | */ |
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| 215 | public static boolean isPlatformOsx() { |
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| 216 | return Main.platform != null && Main.platform instanceof PlatformHookOsx; |
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| 217 | } |
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| 218 | |
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| 219 | } |
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