Add location & zoom node for network diagram - also OSM attribution

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

diff --git a/org.simantics.district.maps/src/org/simantics/maps/sg/MapLocationZoomInfoNode.java b/org.simantics.district.maps/src/org/simantics/maps/sg/MapLocationZoomInfoNode.java
new file mode 100644 (file)
index 0000000..bad499e
--- /dev/null
+++ b/org.simantics.district.maps/src/org/simantics/maps/sg/MapLocationZoomInfoNode.java
@@ -0,0 +1,182 @@
+package org.simantics.maps.sg;
+
+import java.awt.AlphaComposite;
+import java.awt.BasicStroke;
+import java.awt.Color;
+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 java.util.Locale;
+
+import org.simantics.g2d.participant.MouseUtil;
+import org.simantics.g2d.participant.MouseUtil.MouseInfo;
+import org.simantics.maps.MapScalingTransform;
+import org.simantics.scenegraph.g2d.G2DNode;
+
+public class MapLocationZoomInfoNode extends G2DNode {
+
+    private static final long serialVersionUID = 7994492218791569147L;
+
+    private static final Color GRAY              = new Color(100, 100, 100);
+
+    protected boolean enabled = true;
+
+    private MouseUtil util;
+    
+    @Override
+    public void render(Graphics2D g2d) {
+        if (!enabled)
+            return;
+        
+        AffineTransform ot = g2d.getTransform();
+        Color originalColor = g2d.getColor();
+        g2d.transform(transform);
+        
+        AffineTransform tr = g2d.getTransform();
+        
+        g2d.setTransform(new AffineTransform());
+        // do the rendering magic
+        
+        Font rulerFont = new Font("Tahoma", Font.PLAIN, 9);
+        
+        //g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        g2d.setStroke(new BasicStroke(1));
+        g2d.setColor(new Color(0.9f, 0.9f, 0.9f, 0.75f));
+        
+        Rectangle2D bounds = g2d.getClipBounds();
+        if (bounds == null)
+            return; // FIXME
+
+        int zoomLevel = MapScalingTransform.zoomLevel(ot);
+        MouseInfo mouseInfo = util.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;
+        }
+        
+        String str = "X: " + formatValue(startLon, MAX_DIGITS) + ", Y: " + formatValue(startLat, MAX_DIGITS) + ", Z: " + zoomLevel;
+        FontMetrics fm = g2d.getFontMetrics();
+        Rectangle2D r = fm.getStringBounds(str, g2d);
+
+        double pixels = r.getWidth() + 10;
+        double scaleRight = bounds.getMaxX() - 20;
+        double newScaleLeft = scaleRight - pixels;
+        double y = bounds.getMaxY() - 65;
+        g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f));
+        
+        
+        Rectangle2D vertical = new Rectangle2D.Double(newScaleLeft, y, pixels, 20);
+        g2d.fill(vertical);
+        
+        g2d.setColor(GRAY);
+        g2d.setFont(rulerFont);
+        
+        
+        g2d.setColor(Color.BLACK);
+        g2d.drawString(str, (int)newScaleLeft + 5, (int)y + 15);
+        
+        g2d.setColor(originalColor);
+        g2d.setTransform(ot);
+    }
+
+    @Override
+    public Rectangle2D getBoundsInLocal() {
+        return null;
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    public void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+    }
+
+    public void setMouseUtil(MouseUtil util) {
+        this.util = util;
+    }
+
+    private static final transient int    MAX_DIGITS = 7;
+    private static final transient double EPSILON    = 0.01;
+    private static final transient double TRIM_THRESHOLD_MAX_VALUE = Math.pow(10, 4);
+    private static final transient String[] SI_UNIT_LARGE_PREFIXES = {
+        "k", "M", "G", "T", "P", "E", "Z", "Y"
+    };
+
+    private static String formatValue(double value, int maxDigits) {
+        int magnitude = (int) Math.round(Math.log10(value));
+        //System.out.println("magnitude: " + magnitude + ", " + value);
+        int allowedDecimals = maxDigits;
+        allowedDecimals -= Math.abs(magnitude);
+        if (allowedDecimals < 0)
+            allowedDecimals = 0;
+
+        String valueStr = String.format(Locale.US, "%." + allowedDecimals + "f", value);
+        if (allowedDecimals > 0) {
+            for (int trunc = valueStr.length() - 1; trunc > 0; --trunc) {
+                char ch = valueStr.charAt(trunc);
+                if (ch == '.') {
+                    valueStr = valueStr.substring(0, trunc);
+                    break;
+                }
+                if (valueStr.charAt(trunc) != '0') {
+                    valueStr = valueStr.substring(0, trunc + 1);
+                    break;
+                }
+            }
+            if (Math.abs(value) + EPSILON > TRIM_THRESHOLD_MAX_VALUE) {
+                // Cut anything beyond a possible decimal dot out since they
+                // should not show anyway. This is a complete hack that tries to
+                // circumvent floating-point inaccuracy problems.
+                int dotIndex = valueStr.lastIndexOf('.');
+                if (dotIndex > -1) {
+                    valueStr = valueStr.substring(0, dotIndex);
+                }
+            }
+        }
+
+        double trimValue = value;
+        if (Math.abs(value)+EPSILON >= TRIM_THRESHOLD_MAX_VALUE) {
+            for (int i = 0; Math.abs(trimValue)+EPSILON >= TRIM_THRESHOLD_MAX_VALUE; ++i) {
+                double trim = trimValue / 1000;
+                if (Math.abs(trim)-EPSILON < TRIM_THRESHOLD_MAX_VALUE) {
+                    valueStr = valueStr.substring(0, valueStr.length() - (i + 1) * 3);
+                    valueStr += SI_UNIT_LARGE_PREFIXES[i];
+                    break;
+                }
+                trimValue = trim;
+            }
+        }
+
+        if (valueStr.equals("-0"))
+            valueStr = "0";
+
+        return valueStr;
+    }
+
+    // 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;
+    }
+}