Improved the tabbed results presenter

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/shared/controls/ScrolledTabLayoutPanel.java

@@ -193,6 +193,19 @@ public class ScrolledTabLayoutPanel extends TabLayoutPanel {
 
     }
     
+    public void scrollToTab(int tabNumber) {
+        Widget tab = getTab(tabNumber);
+        if (tab == null)
+            return;
+        
+        int oldLeft = parsePosition(tabBar.getElement().getStyle().getLeft());
+        int difference = getAbsoluteRightOfTabBar() - getAbsoluteRightOfWidget(tab) - SCROLL_RIGHT_TAB_MARGIN;
+        
+        // Prevent over-scrolling left border
+        int newLeft = Math.min(oldLeft + difference, 0);
+        scrollTo(oldLeft, newLeft);
+    }
+
     private void resetScrollPosition() {
         scrollTo(0, 0);
     }
@@ -259,6 +272,14 @@ public class ScrolledTabLayoutPanel extends TabLayoutPanel {
         return tabBar.getWidget(tabBar.getWidgetCount() - 1);
     }
     
+    private Widget getTab(int tabNumber) {
+        if (tabNumber < 0 || tabNumber >= tabBar.getWidgetCount()) {
+            return null;
+        }
+        
+        return tabBar.getWidget(tabNumber);
+    }
+    
     private Widget getFirstTab() {
         if (tabBar.getWidgetCount() == 0)
             return null;

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/datamining/DataMiningResources.java

@@ -8,4 +8,10 @@ public interface DataMiningResources extends ClientBundle {
     @Source("com/sap/sailing/gwt/ui/client/images/close.png")
     ImageResource closeIcon();
 
+    @Source("com/sap/sailing/gwt/ui/client/images/arrow_left.png")
+    ImageResource arrowLeftIcon();
+
+    @Source("com/sap/sailing/gwt/ui/client/images/arrow_right.png")
+    ImageResource arrowRightIcon();
+
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/datamining/presentation/ResultsChart.java

@@ -120,7 +120,8 @@ public class ResultsChart implements ResultsPresenter<Number> {
         presentationPanel = new ResizingSimplePanel() {
             @Override
             public void onResize() {
-                updateChartSize();
+                chart.setSizeToMatchContainer();
+                chart.redraw();
             }
         };
         mainPanel.add(presentationPanel);
@@ -138,11 +139,6 @@ public class ResultsChart implements ResultsPresenter<Number> {
         showError(this.stringMessages.invalidSelection());
     }
     
-    /*package*/ void updateChartSize() {
-        chart.setSizeToMatchContainer();
-        chart.redraw();
-    }
-
     @Override
     public void showError(String error) {
         currentResult = null;

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/datamining/presentation/TabResultsPresenter.java

@@ -7,9 +7,9 @@ import com.google.gwt.event.dom.client.ClickHandler;
 import com.google.gwt.user.client.ui.HTML;
 import com.google.gwt.user.client.ui.HorizontalPanel;
 import com.google.gwt.user.client.ui.Image;
-import com.google.gwt.user.client.ui.TabLayoutPanel;
 import com.google.gwt.user.client.ui.Widget;
 import com.sap.sailing.gwt.ui.client.StringMessages;
+import com.sap.sailing.gwt.ui.client.shared.controls.ScrolledTabLayoutPanel;
 import com.sap.sailing.gwt.ui.datamining.DataMiningResources;
 import com.sap.sailing.gwt.ui.datamining.ResultsPresenter;
 import com.sap.sse.datamining.shared.QueryResult;
@@ -20,12 +20,12 @@ public class TabResultsPresenter implements ResultsPresenter<Number> {
     
     private final StringMessages stringMessages;
     
-    private final TabLayoutPanel tabPanel;
+    private final ScrolledTabLayoutPanel tabPanel;
     
     public TabResultsPresenter(StringMessages stringMessages) {
         this.stringMessages = stringMessages;
         
-        tabPanel = new TabLayoutPanel(20, Unit.PX);
+        tabPanel = new ScrolledTabLayoutPanel(30, Unit.PX, resources.arrowLeftIcon(), resources.arrowRightIcon());
         tabPanel.setAnimationDuration(0);
         tabPanel.getElement().getStyle().setMarginTop(10, Unit.PX);
     }
@@ -37,19 +37,19 @@ public class TabResultsPresenter implements ResultsPresenter<Number> {
 
     @Override
     public void showResult(QueryResult<Number> result) {
-        ResultsPresenter<Number> tabPresenter = addTabAndFocus();
+        ResultsPresenter<Number> tabPresenter = addTabAndFocus(result.getResultSignifier());
         tabPresenter.showResult(result);
     }
 
     @Override
     public void showError(String error) {
-        ResultsPresenter<Number> tabPresenter = addTabAndFocus();
+        ResultsPresenter<Number> tabPresenter = addTabAndFocus(stringMessages.error());
         tabPresenter.showError(error);
     }
 
     @Override
     public void showError(String mainError, Iterable<String> detailedErrors) {
-        ResultsPresenter<Number> tabPresenter = addTabAndFocus();
+        ResultsPresenter<Number> tabPresenter = addTabAndFocus(stringMessages.error());
         tabPresenter.showError(mainError, detailedErrors);
     }
 
@@ -58,12 +58,12 @@ public class TabResultsPresenter implements ResultsPresenter<Number> {
         // Do nothing here. A management of the different tabs is necessary to handle this.
     }
 
-    private ResultsPresenter<Number> addTabAndFocus() {
+    private ResultsPresenter<Number> addTabAndFocus(String headerText) {
-        CloseableTabHeader tabHeader = new CloseableTabHeader("Test");
+        CloseableTabHeader tabHeader = new CloseableTabHeader(headerText);
         ResultsChart tabPresenter = new ResultsChart(stringMessages);
         tabPanel.add(tabPresenter.getWidget(), tabHeader.getWidget());
         tabPanel.selectTab(tabPanel.getWidgetCount() - 1);
-        tabPresenter.updateChartSize();
+        tabPanel.scrollToTab(tabPanel.getWidgetCount() - 1);
         return tabPresenter;
     }
     
@@ -80,7 +80,9 @@ public class TabResultsPresenter implements ResultsPresenter<Number> {
             closeImage.addClickHandler(new ClickHandler() {
                 @Override
                 public void onClick(ClickEvent event) {
-                    widget.removeFromParent();
+                    if (tabPanel.getWidgetCount() > 1) {
+                        widget.removeFromParent();
+                    }
                 }
             });
             widget.add(closeImage);