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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 java.awt.geom.Point2D; |
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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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@Override |
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public void performDragging(XMapPane mapPane, MouseEvent ev, |
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Point dragStartPos, Point dragLastPos, |
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DirectPosition startCoord, DirectPosition endCoord) { |
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if (dragLastPos != null) |
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mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, |
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dragLastPos); |
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mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, ev |
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.getPoint()); |
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} |
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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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int units = wheelEvt.getUnitsToScroll(); |
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// Positiver Wert --> Zoom in --> Faktor < 1 |
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// Negativer Wert --> Zoom out --> Faktir > 1 |
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// SK: 9.9.2007 zoom jetzt wie bei GoogleEarth |
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double zFactor = units > 0 ? 1.3 : 1 / 1.3; |
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// vorher double zFactor = units > 0 ? 1/1.2 : 1.2; |
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// Fenster-Koordinaten zu Karten-Koordinaten transformieren |
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Point2D mapCoord = XMapPane.getMapCoordinatesFromEvent(wheelEvt); |
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// Relative Position des Mauszeigers zum Kartenausschnitt |
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// -> Nach Zoom soll dieselbe Kartenposition unterhalb des Mauszeigers |
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// erscheinen, wie vor dem Zoom |
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double relX = (mapCoord.getX() - mapPane.getMapArea().getMinX()) |
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/ mapPane.getMapArea().getWidth(); |
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double relY = (mapCoord.getY() - mapPane.getMapArea().getMinY()) |
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/ mapPane.getMapArea().getHeight(); |
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// Neuen Karten-Ausschnitt berechnen |
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Coordinate ll = new Coordinate(mapCoord.getX() |
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- mapPane.getMapArea().getWidth() * relX * zFactor, mapCoord.getY() |
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- mapPane.getMapArea().getHeight() * relY * zFactor); |
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Coordinate ur = new Coordinate(mapCoord.getX() |
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+ mapPane.getMapArea().getWidth() * (1 - relX) * zFactor, mapCoord |
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.getY() |
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+ mapPane.getMapArea().getHeight() * (1 - relY) * zFactor); |
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mapPane.setMapArea(new Envelope(ll, ur)); |
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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, |
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DirectPosition startCoord, DirectPosition endCoord) { |
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if (dragLastPos != null) |
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mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, |
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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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public static class Out 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(), 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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int units = wheelEvt.getUnitsToScroll(); |
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// Positiver Wert --> Zoom in --> Faktor < 1 |
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// Negativer Wert --> Zoom out --> Faktir > 1 |
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// SK: 9.9.2007 zoom jetzt wie bei GoogleEarth |
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double zFactor = units > 0 ? 1.3 : 1 / 1.3; |
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// vorher double zFactor = units > 0 ? 1/1.2 : 1.2; |
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// Fenster-Koordinaten zu Karten-Koordinaten transformieren |
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Point2D mapCoord = XMapPane.getMapCoordinatesFromEvent(wheelEvt); |
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// Relative Position des Mauszeigers zum Kartenausschnitt |
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// -> Nach Zoom soll dieselbe Kartenposition unterhalb des Mauszeigers |
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// erscheinen, wie vor dem Zoom |
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double relX = (mapCoord.getX() - mapPane.getMapArea().getMinX()) |
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/ mapPane.getMapArea().getWidth(); |
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double relY = (mapCoord.getY() - mapPane.getMapArea().getMinY()) |
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/ mapPane.getMapArea().getHeight(); |
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// Neuen Karten-Ausschnitt berechnen |
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Coordinate ll = new Coordinate(mapCoord.getX() |
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- mapPane.getMapArea().getWidth() * relX * zFactor, mapCoord.getY() |
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- mapPane.getMapArea().getHeight() * relY * zFactor); |
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Coordinate ur = new Coordinate(mapCoord.getX() |
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+ mapPane.getMapArea().getWidth() * (1 - relX) * zFactor, mapCoord |
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.getY() |
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+ mapPane.getMapArea().getHeight() * (1 - relY) * zFactor); |
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mapPane.setMapArea(new Envelope(ll, ur)); |
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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, |
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DirectPosition startCoord, DirectPosition endCoord) { |
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if (dragLastPos != null) |
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mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, |
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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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// make the dragged rectangle in screen coords the new map size? |
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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 double nWidth = (mapWidth * mapWidth) / (right - left); |
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final double nHeight = (mapHeight * mapHeight) / (top - bottom); |
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final double deltaX1 = left - mapArea.getMinX(); |
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final double nDeltaX1 = (deltaX1 * nWidth) / mapWidth; |
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final double deltaY1 = bottom - mapArea.getMinY(); |
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final double nDeltaY1 = (deltaY1 * nHeight) / mapHeight; |
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final Coordinate ll = new Coordinate(mapArea.getMinX() - nDeltaX1, |
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mapArea.getMinY() - nDeltaY1); |
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final double deltaX2 = mapArea.getMaxX() - right; |
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final double nDeltaX2 = (deltaX2 * nWidth) / mapWidth; |
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final double deltaY2 = mapArea.getMaxY() - top; |
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final double nDeltaY2 = (deltaY2 * nHeight) / mapHeight; |
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final Coordinate ur = new Coordinate(mapArea.getMaxX() + nDeltaX2, |
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mapArea.getMaxY() + nDeltaY2); |
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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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