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package skrueger.geotools; |
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import java.awt.Point; |
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import java.awt.Rectangle; |
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import java.awt.event.MouseEvent; |
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import java.awt.event.MouseWheelEvent; |
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import org.opengis.geometry.DirectPosition; |
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import com.vividsolutions.jts.geom.Coordinate; |
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import com.vividsolutions.jts.geom.Envelope; |
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public abstract class XMapPaneAction_Zoom implements XMapPaneAction { |
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public static class In extends XMapPaneAction_Zoom { |
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@Override |
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public void performClick(XMapPane mapPane, MouseEvent ev, |
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DirectPosition coord) { |
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mapPane.zoomTo(ev.getPoint(), 1 / 2.); |
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} |
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@Override |
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public void performWheel(XMapPane mapPane, MouseWheelEvent wheelEvt, |
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DirectPosition coord) { |
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final int units = wheelEvt.getUnitsToScroll(); |
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if (units > 0) |
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mapPane.zoomTo(wheelEvt.getPoint(), 1. + .11 * units); |
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else |
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mapPane.zoomTo(wheelEvt.getPoint(), 2. / -units); |
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} |
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@Override |
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public void performDragging(XMapPane mapPane, MouseEvent ev, |
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Point dragStartPos, Point dragLastPos, DirectPosition startCoord, |
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DirectPosition endCoord) { |
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if (dragLastPos != null) |
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mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, dragLastPos); |
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mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, ev |
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.getPoint()); |
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} |
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@Override |
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public void performDragged(XMapPane mapPane, MouseEvent ev, |
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Point dragStartPos, Point dragLastPos, DirectPosition startCoord, |
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DirectPosition endCoord) { |
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if (dragLastPos != null) |
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mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, dragLastPos ); |
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// If this is similar to a click, let mouseClicked handle it! |
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if ((Math.abs(dragStartPos.x - ev.getPoint().x) * Math.abs(ev |
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.getPoint().y |
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- dragStartPos.y)) < 160) { |
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// performClick(mapPane, ev, coord) |
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return; |
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} |
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final Rectangle bounds = mapPane.getBounds(); |
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Envelope mapArea = mapPane.getMapArea(); |
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// Replace with transform and translate |
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final double mapWidth = mapArea.getWidth(); |
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final double mapHeight = mapArea.getHeight(); |
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final double startX = ((dragStartPos.x * mapWidth) / (double) bounds.width) |
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+ mapArea.getMinX(); |
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final double startY = (((bounds.getHeight() - dragStartPos.y) * mapHeight) / (double) bounds.height) |
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+ mapArea.getMinY(); |
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final double endX = ((ev.getPoint().x * mapWidth) / (double) bounds.width) |
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+ mapArea.getMinX(); |
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final double endY = (((bounds.getHeight() - ev.getPoint().y) * mapHeight) / (double) bounds.height) |
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+ mapArea.getMinY(); |
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final double left = Math.min(startX, endX); |
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final double right = Math.max(startX, endX); |
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final double bottom = Math.min(startY, endY); |
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final double top = Math.max(startY, endY); |
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final Coordinate ll = new Coordinate(left, bottom); |
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final Coordinate ur = new Coordinate(right, top); |
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mapPane.setMapArea(new Envelope(ll, ur)); |
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} |
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} |
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} |
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