// License: GPL. Copyright 2007 by Immanuel Scholz and others package org.openstreetmap.josm.gui; import static org.openstreetmap.josm.tools.I18n.tr; import java.awt.Cursor; import java.awt.Point; import java.awt.event.ActionEvent; import java.awt.event.KeyEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.event.MouseWheelEvent; import java.awt.event.MouseWheelListener; import javax.swing.AbstractAction; import javax.swing.JComponent; import javax.swing.JPanel; import org.openstreetmap.josm.Main; import org.openstreetmap.josm.data.coor.EastNorth; import org.openstreetmap.josm.tools.PlatformHookOsx; import org.openstreetmap.josm.tools.Shortcut; /** * Enables moving of the map by holding down the right mouse button and drag * the mouse. Also, enables zooming by the mouse wheel. * * @author imi */ public class MapMover extends MouseAdapter implements MouseMotionListener, MouseWheelListener { private final class ZoomerAction extends AbstractAction { private final String action; public ZoomerAction(String action) { this.action = action; } public void actionPerformed(ActionEvent e) { if (action.equals(".") || action.equals(",")) { Point mouse = nc.getMousePosition(); if (mouse == null) mouse = new Point((int)nc.getBounds().getCenterX(), (int)nc.getBounds().getCenterY()); 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); mouseWheelMoved(we); } else { EastNorth center = nc.getCenter(); EastNorth newcenter = nc.getEastNorth(nc.getWidth()/2+nc.getWidth()/5, nc.getHeight()/2+nc.getHeight()/5); if (action.equals("left")) nc.zoomTo(new EastNorth(2*center.east()-newcenter.east(), center.north())); else if (action.equals("right")) nc.zoomTo(new EastNorth(newcenter.east(), center.north())); else if (action.equals("up")) nc.zoomTo(new EastNorth(center.east(), 2*center.north()-newcenter.north())); else if (action.equals("down")) nc.zoomTo(new EastNorth(center.east(), newcenter.north())); } } } /** * The point in the map that was the under the mouse point * when moving around started. */ private EastNorth mousePosMove; /** * The map to move around. */ private final NavigatableComponent nc; private boolean movementInPlace = false; /** * Create a new MapMover */ public MapMover(NavigatableComponent navComp, JPanel contentPane) { this.nc = navComp; nc.addMouseListener(this); nc.addMouseMotionListener(this); nc.addMouseWheelListener(this); if (contentPane != null) { contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( Shortcut.registerShortcut("system:movefocusright", tr("Map: {0}", tr("Move right")), KeyEvent.VK_RIGHT, Shortcut.GROUP_HOTKEY).getKeyStroke(), "MapMover.Zoomer.right"); contentPane.getActionMap().put("MapMover.Zoomer.right", new ZoomerAction("right")); contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( Shortcut.registerShortcut("system:movefocusleft", tr("Map: {0}", tr("Move left")), KeyEvent.VK_LEFT, Shortcut.GROUP_HOTKEY).getKeyStroke(), "MapMover.Zoomer.left"); contentPane.getActionMap().put("MapMover.Zoomer.left", new ZoomerAction("left")); contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( Shortcut.registerShortcut("system:movefocusup", tr("Map: {0}", tr("Move up")), KeyEvent.VK_UP, Shortcut.GROUP_HOTKEY).getKeyStroke(), "MapMover.Zoomer.up"); contentPane.getActionMap().put("MapMover.Zoomer.up", new ZoomerAction("up")); contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( Shortcut.registerShortcut("system:movefocusdown", tr("Map: {0}", tr("Move down")), KeyEvent.VK_DOWN, Shortcut.GROUP_HOTKEY).getKeyStroke(), "MapMover.Zoomer.down"); contentPane.getActionMap().put("MapMover.Zoomer.down", new ZoomerAction("down")); contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( Shortcut.registerShortcut("view:zoominalternate", tr("Map: {0}", tr("Zoom in")), KeyEvent.VK_COMMA, Shortcut.GROUP_HOTKEY).getKeyStroke(), "MapMover.Zoomer.in"); contentPane.getActionMap().put("MapMover.Zoomer.in", new ZoomerAction(",")); contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put( Shortcut.registerShortcut("view:zoomoutalternate", tr("Map: {0}", tr("Zoom out")), KeyEvent.VK_PERIOD, Shortcut.GROUP_HOTKEY).getKeyStroke(), "MapMover.Zoomer.out"); contentPane.getActionMap().put("MapMover.Zoomer.out", new ZoomerAction(".")); } } /** * If the right (and only the right) mouse button is pressed, move the map */ public void mouseDragged(MouseEvent e) { int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK; if ((e.getModifiersEx() & (MouseEvent.BUTTON3_DOWN_MASK | offMask)) == MouseEvent.BUTTON3_DOWN_MASK) { if (mousePosMove == null) startMovement(e); EastNorth center = nc.getCenter(); EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY()); nc.zoomTo(new EastNorth( mousePosMove.east() + center.east() - mouseCenter.east(), mousePosMove.north() + center.north() - mouseCenter.north())); } else endMovement(); } /** * Start the movement, if it was the 3rd button (right button). */ @Override public void mousePressed(MouseEvent e) { int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK; int macMouseMask = MouseEvent.CTRL_DOWN_MASK | MouseEvent.BUTTON1_DOWN_MASK; if (e.getButton() == MouseEvent.BUTTON3 && (e.getModifiersEx() & offMask) == 0) { startMovement(e); } else if (isPlatformOsx() && e.getModifiersEx() == macMouseMask) { startMovement(e); } } /** * Change the cursor back to it's pre-move cursor. */ @Override public void mouseReleased(MouseEvent e) { if (e.getButton() == MouseEvent.BUTTON3) { endMovement(); } else if (isPlatformOsx() && e.getButton() == MouseEvent.BUTTON1) { endMovement(); } } /** * Start movement by setting a new cursor and remember the current mouse * position. * @param e The mouse event that leat to the movement from. */ private void startMovement(MouseEvent e) { if (movementInPlace) return; movementInPlace = true; mousePosMove = nc.getEastNorth(e.getX(), e.getY()); nc.setNewCursor(Cursor.MOVE_CURSOR, this); } /** * End the movement. Setting back the cursor and clear the movement variables */ private void endMovement() { if (!movementInPlace) return; movementInPlace = false; nc.resetCursor(this); mousePosMove = null; } /** * Zoom the map by 1/5th of current zoom per wheel-delta. * @param e The wheel event. */ public void mouseWheelMoved(MouseWheelEvent e) { nc.zoomToFactor(e.getX(), e.getY(), Math.pow(0.8, - e.getWheelRotation())); } /** * Emulates dragging on Mac OSX */ public void mouseMoved(MouseEvent e) { if (!movementInPlace) return; // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired. // Is only the selected mouse button pressed? if (isPlatformOsx()) { if (e.getModifiersEx() == MouseEvent.CTRL_DOWN_MASK) { if (mousePosMove == null) { startMovement(e); } EastNorth center = nc.getCenter(); EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY()); nc.zoomTo(new EastNorth(mousePosMove.east() + center.east() - mouseCenter.east(), mousePosMove.north() + center.north() - mouseCenter.north())); } else { endMovement(); } } } /** * Replies true if we are currently running on OSX * * @return true if we are currently running on OSX */ public static boolean isPlatformOsx() { return Main.platform != null && Main.platform instanceof PlatformHookOsx; } }