# HG changeset patch
# User dnt_bjoernsen <d.tironi@bjoernsen.de>
# Date 1611154508 -3600
# Node ID e388db7fd72ea2d17c2d896c7555d84e8ec1e9f4
# Parent  9e0ee81a9b7e424a9e2e8d942cf65a32ef8b410b
another attempt

diff -r 9e0ee81a9b7e -r e388db7fd72e gwt-client/src/main/java/org/dive4elements/river/client/client/ui/map/LegendWindow.java
--- a/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/map/LegendWindow.java	Wed Jan 20 11:35:59 2021 +0100
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/map/LegendWindow.java	Wed Jan 20 15:55:08 2021 +0100
@@ -17,6 +17,7 @@
 import org.dive4elements.river.client.shared.model.ThemeList;
 
 import com.google.gwt.core.client.GWT;
+import com.google.gwt.event.dom.client.LoadHandler;
 import com.google.gwt.http.client.URL;
 import com.google.gwt.user.client.ui.Image;
 import com.google.gwt.user.client.ui.Widget;
@@ -31,133 +32,135 @@
 
 public class LegendWindow extends Window {
 
-    protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
-
-    private ThemeList themeList;
-
-    private final VLayout legendContainer;
-
-    public LegendWindow(final ThemeList themeList) {
-        this.themeList = themeList;
-        this.legendContainer = new VLayout();
-
-        init();
-    }
-
-    public void update(final ThemeList themeList) {
-        this.themeList = themeList;
-
-        final Canvas[] legends = this.legendContainer.getMembers();
-        this.legendContainer.removeMembers(legends);
-
-        addLegends();
-    }
+	protected FLYSConstants MSG = GWT.create(FLYSConstants.class);
 
-    private void addLegends() {
-        final List<Theme> themes = this.themeList.getActiveThemes();
-        com.smartgwt.client.util.SC.say("themescount " + themes.size());
-        
-        
-        for (int i = 0; i< themes.size() ; i++) {
-        	final Theme theme = themes.get(i);
-            if (theme.getActive() == 0) {
-                continue;
-            }
-            try {
-            if (theme instanceof AttributedTheme) {
-                this.legendContainer.addMember(createLegendGraphicsRow((AttributedTheme) theme));
-            } } catch (Exception e) {
-                com.smartgwt.client.util.SC.say("exception at index " + themes.size());
-            	continue;
-            }
-        }
-    }
-
-    private Canvas createLegendGraphicsRow(final AttributedTheme at) {
-    	 com.smartgwt.client.util.SC.say("init");
-        final Label label = new Label(at.getDescription());
-        final Widget img = createLegendGraphics(at);
+	private ThemeList themeList;
 
-        final HLayout row = new HLayout();
-        row.addMember(label);
-        row.addMember(img);
-        
-        String url = "url";
-        
-        if (img instanceof Image) {
-        	setDimensions( row, ((Image) img).getHeight(),  ((Image) img).getWidth());
-        	url = " url " + ((Image) img).getUrl();
-        }
-        else if (img instanceof Img) {
-        	setDimensions( row, ((Img) img).getHeight(),  ((Img) img).getWidth());
-        	url = " dataPath " + ((Img) img).getDataPath();
-        }
-        else {
-        	setDimensions( row, 150,  400); //not sure when this is executed
-        }
-        String labelText =   at.getDescription() +", height: "+ row.getHeight()+"width: "+ row.getWidth()+" "+url;
-   //   
-//        final HLayout row2= new HLayout();
-//        row.addMember(new Label(labelText));
+	private final VLayout legendContainer;
 
-        com.smartgwt.client.util.SC.say(labelText);
-        return row;
-    }
+	public LegendWindow(final ThemeList themeList) {
+		this.themeList = themeList;
+		this.legendContainer = new VLayout();
 
-	private void setDimensions(HLayout row, int height, int width ) {
+		init();
+	}
+
+	public void update(final ThemeList themeList) {
+		this.themeList = themeList;
+
+		final Canvas[] legends = this.legendContainer.getMembers();
+		this.legendContainer.removeMembers(legends);
+
+		addLegends();
+	}
+
+	private void addLegends() {
+		final List<Theme> themes = this.themeList.getActiveThemes();
+		com.smartgwt.client.util.SC.say("themescount " + themes.size());
+
+		for (int i = 0; i < themes.size(); i++) {
+			final Theme theme = themes.get(i);
+			if (theme.getActive() == 0) {
+				continue;
+			}
+			try {
+				if (theme instanceof AttributedTheme) {
+					Canvas createLegendGraphicsRow = createLegendGraphicsRow((AttributedTheme) theme);
+					this.legendContainer.addMember(createLegendGraphicsRow);
+				}
+			} catch (Exception e) {
+				com.smartgwt.client.util.SC.say("exception at index " + themes.size());
+				continue;
+			}
+		}
+	}
+
+	private Canvas createLegendGraphicsRow(final AttributedTheme at) {
+		com.smartgwt.client.util.SC.say("init");
+		final Label label = new Label(at.getDescription());
+		final Widget img = createLegendGraphics(at);
+
+		final HLayout row = new HLayout();
+		row.addMember(label);
+		row.addMember(img);
+
+		String url = "url";
+
+		if (img instanceof Image) {
+			Image.prefetch(((Image) img).getUrl());
+			setDimensions(row, ((Image) img).getHeight(), ((Image) img).getWidth());
+			url = " url " + ((Image) img).getUrl();
+		} else if (img instanceof Img) {
+			setDimensions(row, ((Img) img).getHeight(), ((Img) img).getWidth());
+			url = " dataPath " + ((Img) img).getDataPath();
+		} else {
+			setDimensions(row, 150, 400); // not sure when this is executed
+		}
+		String labelText = at.getDescription() + ", height: " + row.getHeight() + "width: " + row.getWidth() + " "
+				+ url;
+		//
+		// final HLayout row2= new HLayout();
+		// row.addMember(new Label(labelText));
+
+		com.smartgwt.client.util.SC.say(labelText);
+		return row;
+	}
+
+	private void setDimensions(HLayout row, int height, int width) {
 		final int minHeight = 30;
 		row.setHeight(height < minHeight ? minHeight : height);
 		row.setWidth(width);
 	}
 
-    private Widget createLegendGraphics(final AttributedTheme at) {
-
-        final String legend = at.getAttr("legend");
-        // TEST: final Image img = new Image("/images/FLYS_Donau.png"); (funktioniert!), ebenso FLYSResources.getTest();
-        if (legend != null && !"".equals(legend)) {
-
-            final String imgUrl = URL.encode(GWT.getHostPageBaseURL() + "images/wms_legend/" + legend);
-
-            final Image image = new Image(imgUrl);
-            final int imageWidth = image.getWidth();
-            final int imageHeight = image.getHeight();
-            final double widthPercent = imageWidth / 400.;
-
-            // removing the limit of 150px height (legend can have an infinite height now,
-            // as long as the width is less/eq 400px; if the width is >400,
-            // the legend will be scaled to 400px width; the ratio will be kept)
-
-            // final double heightPercent = imageHeight / 150.;
-            if (widthPercent > 1)// || heightPercent > 1) {
-                image.setSize((int) (imageWidth / widthPercent) + "px", (int) (imageHeight / widthPercent) + "px");
-            
-            return image;
-        }
-        final String imgUrl = MapUtils.getLegendGraphicUrl(at.getAttr("url"), at.getAttr("layers"));
+	private Widget createLegendGraphics(final AttributedTheme at) {
 
-        final Img img = new Img(imgUrl);
-        img.setImageType(ImageStyle.CENTER);
-        img.setAutoFit(true);
-
-        return img;
-    }
-
-    private void init() {
-        this.legendContainer.setAutoHeight();
-        this.legendContainer.setLayoutAlign(VerticalAlignment.TOP);
-        this.legendContainer.setAlign(VerticalAlignment.CENTER);
+		final String legend = at.getAttr("legend");
+		// TEST: final Image img = new Image("/images/FLYS_Donau.png"); (funktioniert!),
+		// ebenso FLYSResources.getTest();
+		if (legend != null && !"".equals(legend)) {
 
-        setTitle(this.MSG.wms_legend());
-        setAutoSize(true);
-        setCanDragResize(true);
-        setIsModal(false);
-        setShowModalMask(false);
-        setLayoutAlign(VerticalAlignment.TOP);
-        setAlign(VerticalAlignment.TOP);
+			final String imgUrl = URL.encode(GWT.getHostPageBaseURL() + "images/wms_legend/" + legend);
 
-        addItem(this.legendContainer);
-        addLegends();
+			final Image image = new Image(imgUrl);
+			final int imageWidth = image.getWidth();
+			final int imageHeight = image.getHeight();
+			final double widthPercent = imageWidth / 400.;
 
-        centerInPage();
-    }
+			// removing the limit of 150px height (legend can have an infinite height now,
+			// as long as the width is less/eq 400px; if the width is >400,
+			// the legend will be scaled to 400px width; the ratio will be kept)
+
+			// final double heightPercent = imageHeight / 150.;
+			if (widthPercent > 1)// || heightPercent > 1) {
+				image.setSize((int) (imageWidth / widthPercent) + "px", (int) (imageHeight / widthPercent) + "px");
+
+			return image;
+		}
+		final String imgUrl = MapUtils.getLegendGraphicUrl(at.getAttr("url"), at.getAttr("layers"));
+
+		final Img img = new Img(imgUrl);
+		img.setImageType(ImageStyle.CENTER);
+		img.setAutoFit(true);
+
+		return img;
+	}
+
+	private void init() {
+		this.legendContainer.setAutoHeight();
+		this.legendContainer.setLayoutAlign(VerticalAlignment.TOP);
+		this.legendContainer.setAlign(VerticalAlignment.CENTER);
+
+		setTitle(this.MSG.wms_legend());
+		setAutoSize(true);
+		setCanDragResize(true);
+		setIsModal(false);
+		setShowModalMask(false);
+		setLayoutAlign(VerticalAlignment.TOP);
+		setAlign(VerticalAlignment.TOP);
+
+		addItem(this.legendContainer);
+		addLegends();
+
+		centerInPage();
+	}
 }