@Override
public void mouseWheelMoved(MouseWheelEvent evt) {
Point current = evt.getPoint();
Rectangle bound = viewer.getViewportBounds();
double dx = current.x - bound.width / 2;
double dy = current.y - bound.height / 2;
Dimension oldMapSize = viewer.getTileFactory().getMapSize(viewer.getZoom());
viewer.setZoom(viewer.getZoom() + evt.getWheelRotation());
Dimension mapSize = viewer.getTileFactory().getMapSize(viewer.getZoom());
Point2D center = viewer.getCenter();
double dzw = (mapSize.getWidth() / oldMapSize.getWidth());
double dzh = (mapSize.getHeight() / oldMapSize.getHeight());
double x = center.getX() + dx * (dzw - 1);
double y = center.getY() + dy * (dzh - 1);
viewer.setCenter(new Point2D.Double(x, y));
}
/**
* Get line-drawing (red line) with arrow
*
* @param map JXMapViewer
* @param mousePos Point2D
* @return ArrayList<Line2D.Double>
*/
public ArrayList<Line2D.Double> getLines(JXMapViewer map, Point2D mousePos) {
ArrayList<Line2D.Double> lines = new ArrayList<Line2D.Double>();
if (p1 != null) {
// Initialize variables
Point2D pt1 = null;
Point2D pt2 = null;
Point2D middle = null;
double length = 10;
// Set pt1 and pt2
if (p2 == null && p1 != null) {
pt1 = map.getTileFactory().geoToPixel(p1.getGeoposition(), map.getZoom());
pt2 =
map.getTileFactory().geoToPixel(map.convertPointToGeoPosition(mousePos), map.getZoom());
} else {
pt1 = map.getTileFactory().geoToPixel(p1.getGeoposition(), map.getZoom());
pt2 = map.getTileFactory().geoToPixel(p2.getGeoposition(), map.getZoom());
}
// Get red line
Line2D.Double line =
new Line2D.Double((int) pt1.getX(), (int) pt1.getY(), (int) pt2.getX(), (int) pt2.getY());
lines.add(line);
// Set middle point
if (pt1.getX() == pt2.getX()) {
middle = new Point2D.Double(pt1.getX(), (pt1.getY() + pt2.getY()) / 2);
} else if (pt1.getY() == pt2.getY()) {
middle = new Point2D.Double((pt1.getX() + pt2.getX()) / 2, pt1.getY());
} else {
middle = new Point2D.Double((pt1.getX() + pt2.getX()) / 2, (pt1.getY() + pt2.getY()) / 2);
}
// Get length of Line
double difX = (double) pt1.getX() - (double) pt2.getX();
double difY = (double) pt1.getY() - (double) pt2.getY();
// Initialize variables
Point2D arrowLineX = null;
Point2D arrowLineY = null;
// Calculate angle for drawing red arrow
if (difY == 0) {
double deltaX = Math.sqrt((length * length) / 2);
if (difX < 0) {
deltaX = deltaX * -1;
}
double deltaY = deltaX;
arrowLineX = new Point2D.Double(middle.getX() + deltaX, middle.getY() + deltaY);
arrowLineY = new Point2D.Double(middle.getX() + deltaY, middle.getY() - deltaX);
} else {
double angle = Math.atan(difX / difY);
double arrowAngle = angle - 95;
double deltaX = length * Math.sin(arrowAngle);
double deltaY = length * Math.cos(arrowAngle);
if (difY > 0) {
arrowLineX = new Point2D.Double(middle.getX() + deltaX, middle.getY() + deltaY);
arrowLineY = new Point2D.Double(middle.getX() + deltaY, middle.getY() - deltaX);
} else {
arrowLineX = new Point2D.Double(middle.getX() - deltaY, middle.getY() + deltaX);
arrowLineY = new Point2D.Double(middle.getX() - deltaX, middle.getY() - deltaY);
}
}
// Get red arrow
Line2D.Double pijltje1 =
new Line2D.Double(
(int) middle.getX(),
(int) middle.getY(),
(int) arrowLineY.getX(),
(int) arrowLineY.getY());
Line2D.Double pijltje2 =
new Line2D.Double(
(int) middle.getX(),
(int) middle.getY(),
(int) arrowLineX.getX(),
(int) arrowLineX.getY());
lines.add(pijltje1);
lines.add(pijltje2);
}
// Return red line + arrow
return lines;
}