--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/SelectProvider.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,273 @@
+package org.dive4elements.river.client.client.ui;
+
+import com.google.gwt.core.client.GWT;
+import com.smartgwt.client.types.VerticalAlignment;
+import com.smartgwt.client.widgets.Canvas;
+import com.smartgwt.client.widgets.Label;
+import com.smartgwt.client.widgets.form.DynamicForm;
+import com.smartgwt.client.widgets.form.fields.FormItem;
+import com.smartgwt.client.widgets.form.fields.LinkItem;
+import com.smartgwt.client.widgets.form.fields.SelectItem;
+import com.smartgwt.client.widgets.form.fields.SpacerItem;
+import com.smartgwt.client.widgets.form.fields.events.ClickEvent;
+import com.smartgwt.client.widgets.form.fields.events.ClickHandler;
+import com.smartgwt.client.widgets.layout.HLayout;
+import com.smartgwt.client.widgets.layout.VLayout;
+
+import org.dive4elements.river.client.client.FLYSConstants;
+import org.dive4elements.river.client.client.event.StepForwardEvent;
+import org.dive4elements.river.client.shared.model.Data;
+import org.dive4elements.river.client.shared.model.DataItem;
+import org.dive4elements.river.client.shared.model.DataList;
+import org.dive4elements.river.client.shared.model.DefaultData;
+import org.dive4elements.river.client.shared.model.DefaultDataItem;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+
+/**
+ * This UIProvider displays the DataItems of the Data object in a combo box.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class SelectProvider
+extends      AbstractUIProvider
+{
+    private static final long serialVersionUID = 4696637534424070726L;
+
+    /** The message class that provides i18n strings.*/
+    protected FLYSConstants messages = GWT.create(FLYSConstants.class);
+
+    /** The combobox.*/
+    protected DynamicForm form = new DynamicForm();
+
+    public static final int COMBOBOX_THRESHOLD = 20;
+
+
+    /**
+     * This method currently returns a
+     * {@link com.smartgwt.client.widgets.form.DynamicForm} that contains all
+     * data items in a combobox stored in <i>data</i>.
+     *
+     * @param data The {@link Data} object.
+     *
+     * @return a combobox.
+     */
+    @Override
+    public Canvas create(DataList data) {
+        VLayout v = new VLayout();
+        v.setMembersMargin(10);
+        v.addMember(createWidget(data));
+        if(data.size() > COMBOBOX_THRESHOLD) {
+            v.addMember(getNextButton());
+        }
+        return v;
+    }
+
+
+    protected Canvas createWidget(DataList data) {
+        if (data.size() > COMBOBOX_THRESHOLD) {
+            return createComboboxWidget(data);
+        }
+        else {
+            return createListWidget(data);
+        }
+    }
+
+
+    @Override
+    public Canvas createOld(DataList dataList) {
+        HLayout layout  = new HLayout();
+        VLayout vLayout = new VLayout();
+        layout.setWidth("400px");
+
+        Label label = new Label(dataList.getLabel());
+        label.setWidth("200px");
+
+        int size = dataList.size();
+        for (int i = 0; i < size; i++) {
+            Data data        = dataList.get(i);
+            DataItem[] items = data.getItems();
+
+            for (DataItem item: items) {
+                HLayout hLayout = new HLayout();
+
+                hLayout.addMember(label);
+                hLayout.addMember(new Label(item.getLabel()));
+
+                vLayout.addMember(hLayout);
+                vLayout.setWidth("130px");
+            }
+        }
+
+        Canvas back = getBackButton(dataList.getState());
+
+        layout.addMember(label);
+        layout.addMember(vLayout);
+        layout.addMember(back);
+
+        return layout;
+    }
+
+
+    protected Canvas createListWidget(DataList data) {
+        VLayout layout = new VLayout();
+        layout.setAlign(VerticalAlignment.TOP);
+        layout.setHeight(25);
+        layout.setWidth("100%");
+
+        VLayout formLayout = new VLayout();
+        formLayout.setLayoutTopMargin(20);
+        formLayout.setLayoutLeftMargin(50);
+
+        ClickHandler handler = new ClickHandler() {
+            @Override
+            public void onClick(ClickEvent event) {
+                LinkItem li = (LinkItem)event.getItem();
+                String attr = li.getAttribute(li.getName());
+                GWT.log("li.getTarget: " + attr + " " + li.getName());
+                DataItem item = new DefaultDataItem(
+                    attr,
+                    null,
+                    attr);
+
+                Data d = new DefaultData(
+                    li.getName(),
+                    null,
+                    null,
+                    new DataItem [] { item });
+
+                Data [] odata = getData();
+                Data [] ndata = new Data[odata.length+1];
+                System.arraycopy(odata, 0, ndata, 0, odata.length);
+                ndata[odata.length] = d;
+
+                fireStepForwardEvent(new StepForwardEvent(ndata));
+            }
+        };
+
+        for (int i = 0, size = data.size(); i < size; i++) {
+            Data d = data.get(i);
+
+            Label label = new Label(d.getDescription());
+            label.setValign(VerticalAlignment.TOP);
+            label.setHeight(20);
+            label.setWidth(400);
+
+            LinkedHashMap<String, String> initial = new LinkedHashMap<String, String>();
+            ArrayList<FormItem> formItems = new ArrayList<FormItem>();
+
+            for (DataItem item: d.getItems()) {
+                initial.put(item.getLabel().replace(' ', '_'), item.getStringValue());
+                GWT.log("put: " + item.getLabel().replace(' ', '_') + "=" + item.getStringValue());
+
+                LinkItem link = new LinkItem(d.getLabel());
+                link.setLinkTitle(item.getLabel());    // i18n text of the link
+                link.setAttribute(d.getLabel(), item.getStringValue()); // e.g. "calculation_mode":"foo"
+                link.setShowTitle(false);
+                link.setEndRow(true);
+                link.setWidth("350px");
+
+                SpacerItem space = new SpacerItem();
+                space.setWidth(15);
+                formItems.add(space);
+                formItems.add(link);
+
+                link.addClickHandler(handler);
+            }
+
+            form.setFields(formItems.toArray(new FormItem[0]));
+            form.setValues(initial);
+
+            layout.addMember(label);
+            layout.addMember(form);
+        }
+        return layout;
+    }
+
+    protected Canvas createComboboxWidget(DataList data) {
+        GWT.log("SelectProvider.createComboboxWidget()");
+
+        VLayout layout   = new VLayout();
+        layout.setAlign(VerticalAlignment.TOP);
+        layout.setHeight(25);
+
+        LinkedHashMap<String, String> initial = new LinkedHashMap<String, String>();
+
+        int size = data.size();
+
+        for (int i = 0; i < size; i++) {
+            Data d = data.get(i);
+
+            Label label = new Label(d.getDescription());
+            label.setValign(VerticalAlignment.TOP);
+            label.setHeight(20);
+            label.setWidth(400);
+
+            SelectItem combobox = new SelectItem(d.getLabel());
+            combobox.setWidth(250);
+
+            LinkedHashMap<String, String> it = new LinkedHashMap<String, String>();
+
+            boolean  defaultSet = false;
+            boolean  first      = true;
+
+            DataItem def      = d.getDefault();
+            String   defValue = def != null ? def.getStringValue() : null;
+
+            if (defValue != null && defValue.length() > 0) {
+                initial.put(d.getLabel(), def.getStringValue());
+                defaultSet = true;
+            }
+
+            for (DataItem item: d.getItems()) {
+                if (!defaultSet && first) {
+                    initial.put(d.getLabel(), item.getStringValue());
+                    first = false;
+                }
+
+                it.put(item.getStringValue(), item.getLabel());
+            }
+
+            label.setWidth(50);
+            combobox.setValueMap(it);
+            combobox.setShowTitle(false);
+            form.setItems(combobox);
+
+            layout.addMember(label);
+            layout.addMember(form);
+        }
+
+        form.setValues(initial);
+
+        layout.setAlign(VerticalAlignment.TOP);
+
+        return layout;
+    }
+
+
+    @Override
+    protected Data[] getData() {
+        Map<?,?> values  = form.getValues();
+        Iterator<?> keys = values.keySet().iterator();
+
+        Data[] list = new Data[values.size()];
+        int       i = 0;
+
+        while (keys.hasNext()) {
+            String fieldname = ((String) keys.next()).replace('_', ' ');
+            String selection = (String) values.get(fieldname);
+
+            DataItem item    = new DefaultDataItem(fieldname, null, selection);
+
+            list[i++] = new DefaultData(
+                fieldname, null, null, new DataItem[] { item });
+        }
+
+        return list;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :