--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/org/dive4elements/river/client/client/ui/map/MeasureControl.java	Thu Apr 25 12:31:32 2013 +0200
@@ -0,0 +1,219 @@
+package de.intevation.flys.client.client.ui.map;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.i18n.client.NumberFormat;
+
+import com.smartgwt.client.types.SelectionType;
+import com.smartgwt.client.widgets.ImgButton;
+import com.smartgwt.client.widgets.Label;
+import com.smartgwt.client.widgets.events.ClickEvent;
+import com.smartgwt.client.widgets.events.ClickHandler;
+import com.smartgwt.client.widgets.layout.HLayout;
+
+import org.gwtopenmaps.openlayers.client.control.Measure;
+import org.gwtopenmaps.openlayers.client.event.MeasureEvent;
+import org.gwtopenmaps.openlayers.client.event.MeasureListener;
+import org.gwtopenmaps.openlayers.client.event.MeasurePartialListener;
+import org.gwtopenmaps.openlayers.client.handler.PathHandler;
+import org.gwtopenmaps.openlayers.client.handler.PolygonHandler;
+
+import de.intevation.flys.client.client.FLYSConstants;
+import de.intevation.flys.client.client.utils.EnableDisableCmd;
+
+
+public class MeasureControl extends HLayout {
+
+    public static final String NUMBER_FORMAT_PATTERN = "#.##";
+
+    public static final String AREA_UNIT      = "ha";
+    public static final int    AREA_FACTOR_M  = 10000;
+    public static final int    AREA_FACTOR_KM = 100;
+
+    protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
+
+    protected FloodMap floodMap;
+
+    protected Measure measureLine;
+    protected Measure measurePolygon;
+
+    protected ImgButton measureLineButton;
+    protected ImgButton measurePolyButton;
+    protected Label     label;
+
+    protected NumberFormat formatter;
+
+
+    public MeasureControl(FloodMap floodMap, EnableDisableCmd cmd) {
+        this.floodMap = floodMap;
+
+        measureLineButton = createMeasureLineControl(cmd);
+        measurePolyButton = createMeasurePolyControl(cmd);
+
+        formatter = NumberFormat.getFormat(NUMBER_FORMAT_PATTERN);
+
+        label = new Label();
+
+        initLayout();
+    }
+
+
+    protected void initLayout() {
+        setWidth(100);
+        setMembersMargin(2);
+
+        label.setWidth(75);
+
+        addMember(measureLineButton);
+        addMember(measurePolyButton);
+        addMember(label);
+    }
+
+
+    protected ImgButton createMeasureLineControl(final EnableDisableCmd cmd) {
+        measureLine = new Measure(new PathHandler());
+        measureLine.setPersist(true);
+        measureLine.addMeasureListener(new MeasureListener() {
+            public void onMeasure(MeasureEvent e) {
+                updateMeasure(e.getMeasure(), e.getUnits());
+            }
+        });
+        measureLine.addMeasurePartialListener(new MeasurePartialListener() {
+            public void onMeasurePartial(MeasureEvent e) {
+                updateMeasure(e.getMeasure(), e.getUnits());
+            }
+        });
+
+        floodMap.getMap().addControl(measureLine);
+
+        final ImgButton btn = new ImgButton();
+        String baseUrl = GWT.getHostPageBaseURL();
+        btn.setSrc(baseUrl + MSG.measureLine());
+        btn.setActionType(SelectionType.CHECKBOX);
+        btn.setSize(20);
+        btn.setShowRollOver(false);
+        btn.setShowRollOverIcon(false);
+        btn.setSelected(false);
+        btn.setTooltip(MSG.measureDistance());
+        btn.addClickHandler(new ClickHandler() {
+            public void onClick(ClickEvent e) {
+                if (btn.isSelected()) {
+                    cmd.enable();
+                    activateMeasurePolygon(false);
+                    activateMeasureLine(true);
+                }
+                else {
+                    cmd.disable();
+                    activateMeasureLine(false);
+                }
+            }
+        });
+
+        return btn;
+    }
+
+
+    protected ImgButton createMeasurePolyControl(final EnableDisableCmd cmd) {
+        measurePolygon = new Measure(new PolygonHandler());
+        measurePolygon.setPersist(true);
+        measurePolygon.addMeasureListener(new MeasureListener() {
+            public void onMeasure(MeasureEvent e) {
+                updateMeasureArea(e.getMeasure(), e.getUnits());
+            }
+        });
+        measurePolygon.addMeasurePartialListener(new MeasurePartialListener() {
+            public void onMeasurePartial(MeasureEvent e) {
+                updateMeasureArea(e.getMeasure(), e.getUnits());
+            }
+        });
+
+        floodMap.getMap().addControl(measurePolygon);
+
+        final ImgButton btn = new ImgButton();
+        String baseUrl = GWT.getHostPageBaseURL();
+        btn.setSrc(baseUrl + MSG.measurePolygon());
+        btn.setActionType(SelectionType.CHECKBOX);
+        btn.setSize(20);
+        btn.setShowRollOver(false);
+        btn.setShowRollOverIcon(false);
+        btn.setSelected(false);
+        btn.setTooltip(MSG.measureArea());
+        btn.addClickHandler(new ClickHandler() {
+            public void onClick(ClickEvent e) {
+                if (btn.isSelected()) {
+                    cmd.enable();
+                    activateMeasureLine(false);
+                    activateMeasurePolygon(true);
+                }
+                else {
+                    cmd.disable();
+                    activateMeasurePolygon(false);
+                }
+            }
+        });
+
+        return btn;
+    }
+
+
+    protected void clearMeasure() {
+        label.setContents("");
+    }
+
+
+    protected void updateMeasure(float value, String unit) {
+        label.setContents(formatter.format(value) + " " + unit);
+    }
+
+
+    protected void updateMeasureArea(float value, String unit) {
+        float  ha      = value;
+        String ha_unit = unit;
+
+        if (unit.equals("m")) {
+            ha      = (float) value / AREA_FACTOR_M;
+            ha_unit = AREA_UNIT;
+        }
+        else if (unit.equals("km")) {
+            ha      = (float) value * AREA_FACTOR_KM;
+            ha_unit = AREA_UNIT;
+        }
+
+        label.setContents(formatter.format(ha) + " " + ha_unit);
+    }
+
+
+    public void activate(boolean activate) {
+        if (!activate) {
+            clearMeasure();
+            activateMeasureLine(activate);
+            activateMeasurePolygon(activate);
+        }
+    }
+
+
+    protected void activateMeasureLine(boolean activate) {
+        if (activate) {
+            clearMeasure();
+            measureLineButton.select();
+            measureLine.activate();
+        }
+        else {
+            measureLineButton.deselect();
+            measureLine.deactivate();
+        }
+    }
+
+
+    protected void activateMeasurePolygon(boolean activate) {
+        if (activate) {
+            clearMeasure();
+            measurePolyButton.select();
+            measurePolygon.activate();
+        }
+        else {
+            measurePolyButton.deselect();
+            measurePolygon.deactivate();
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :