Optimization of district scene graph node rendering

[simantics/district.git] / org.simantics.district.maps / src / org / simantics / maps / sg / MapLocationInfoNode.java

diff --git a/org.simantics.district.maps/src/org/simantics/maps/sg/MapLocationInfoNode.java b/org.simantics.district.maps/src/org/simantics/maps/sg/MapLocationInfoNode.java
new file mode 100644 (file)
index 0000000..5a8d445
--- /dev/null
+++ b/org.simantics.district.maps/src/org/simantics/maps/sg/MapLocationInfoNode.java
@@ -0,0 +1,109 @@
+package org.simantics.maps.sg;
+
+import java.awt.Color;
+import java.awt.Composite;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics2D;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Point2D;
+import java.awt.geom.Rectangle2D;
+
+import org.simantics.g2d.participant.MouseUtil;
+import org.simantics.g2d.participant.MouseUtil.MouseInfo;
+import org.simantics.maps.elevation.server.SingletonTiffTileInterface;
+import org.simantics.maps.sg.Formatting.FormatMode;
+
+public class MapLocationInfoNode extends MapInfoNode {
+
+    private static final long serialVersionUID = 7994492218791569147L;
+
+    private static final transient int    MAX_DIGITS = 7;
+    private static final transient int    MAX_Z_DECIMALS = 2;
+    private static final transient double TRIM_THRESHOLD_MAX_VALUE = Math.pow(10, 4);
+    private static final transient double TEXT_RIGHT_MARGIN = 20;
+
+    private MouseUtil mouse;
+
+    @Override
+    public void render(Graphics2D g2d) {
+        if (!enabled || mouse == null)
+            return;
+
+        AffineTransform ot = g2d.getTransform();
+        g2d.setTransform(new AffineTransform());
+
+        Rectangle2D bounds = g2d.getClipBounds();
+        if (bounds == null)
+            return; // FIXME
+
+        MouseInfo mouseInfo = mouse.getMouseInfo(0);
+
+        double startLat;
+        double startLon;
+        if (mouseInfo != null && mouseInfo.canvasPosition != null) {
+            Point2D canvasPosition = mouseInfo.canvasPosition;
+            double cx = canvasPosition.getX();
+            double cy = canvasPosition.getY();
+            startLat = yToLatitude(-cy / transform.getScaleY());
+            startLon = xToLongitude(cx / transform.getScaleX());
+        } else {
+            startLat = 0;
+            startLon = 0;
+        }
+
+        Number z = SingletonTiffTileInterface.lookup(startLat, startLon);
+
+        String str = "X: " + Formatting.formatValue(startLon, MAX_DIGITS, false, FormatMode.LIMIT_DIGITS, TRIM_THRESHOLD_MAX_VALUE) +
+                "   Y: " + Formatting.formatValue(startLat, MAX_DIGITS, false, FormatMode.LIMIT_DIGITS, TRIM_THRESHOLD_MAX_VALUE) +
+                "   Z: " + Formatting.formatValue(z.doubleValue(), MAX_Z_DECIMALS, false, FormatMode.LIMIT_DECIMALS, TRIM_THRESHOLD_MAX_VALUE);
+
+        Font font = MapInfoConstants.getInfoFont();
+        g2d.setFont(font);
+        FontMetrics fm = g2d.getFontMetrics();
+
+        Rectangle2D r = fm.getStringBounds(str, g2d);
+
+        double yOffsetFromBottom = getMapInfoNextY(g2d);
+        double frameMaxY = bounds.getMaxY() - yOffsetFromBottom;
+        double frameMinY = frameMaxY - font.getSize() - 2 * MapInfoConstants.TEXT_VERTICAL_MARGIN;
+        double frameWidth = r.getWidth() + MapInfoConstants.TEXT_HORIZONTAL_MARGIN * 2;
+        double frameMaxX = bounds.getMaxX() - TEXT_RIGHT_MARGIN;
+        double frameMinX = frameMaxX - frameWidth;
+        double textY = frameMinY + MapInfoConstants.TEXT_VERTICAL_MARGIN + fm.getMaxAscent();
+
+        Composite oc = g2d.getComposite();
+        g2d.setComposite(MapInfoConstants.INFO_COMPOSITE);
+        g2d.setStroke(MapInfoConstants.INFO_STROKE);
+
+        g2d.setColor(MapInfoConstants.TEXT_BG_COLOR);
+        rect.setFrame(frameMinX, frameMinY, frameWidth, frameMaxY - frameMinY);
+        g2d.fill(rect);
+
+        g2d.setColor(Color.BLACK);
+        g2d.drawString(str, (int) frameMinX + MapInfoConstants.TEXT_HORIZONTAL_MARGIN, (int) textY);
+
+        g2d.setComposite(oc);
+        g2d.setTransform(ot);
+
+        setMapInfoNextY(g2d, yOffsetFromBottom + rect.getHeight() + MapInfoConstants.INFO_ROW_SPACING);
+    }
+
+    public void setMouseUtil(MouseUtil util) {
+        this.mouse = util;
+    }
+
+    // TODO: these only work with Spherical Mercator
+    private static double xToLongitude(double x) {
+        return x;
+    }
+
+    private static double yToLatitude(double y) {
+        double rad = Math.toRadians(y);
+        double sinh = Math.sinh(rad);
+        double atan = Math.atan(sinh);
+        double finald = Math.toDegrees(atan);
+        return finald;
+    }
+
+}