--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/ui/ThemePanel.java	Wed Jul 20 07:52:19 2011 +0000
@@ -0,0 +1,324 @@
+package de.intevation.flys.client.client.ui;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.user.client.rpc.AsyncCallback;
+
+import com.smartgwt.client.util.SC;
+import com.smartgwt.client.widgets.Canvas;
+import com.smartgwt.client.widgets.grid.ListGrid;
+import com.smartgwt.client.widgets.grid.ListGridRecord;
+import com.smartgwt.client.widgets.grid.events.EditCompleteEvent;
+import com.smartgwt.client.widgets.grid.events.EditCompleteHandler;
+
+import de.intevation.flys.client.shared.model.Collection;
+import de.intevation.flys.client.shared.model.FacetRecord;
+import de.intevation.flys.client.shared.model.OutputMode;
+import de.intevation.flys.client.shared.model.Theme;
+import de.intevation.flys.client.shared.model.ThemeList;
+
+import de.intevation.flys.client.client.Config;
+import de.intevation.flys.client.client.FLYSConstants;
+import de.intevation.flys.client.client.event.HasOutputParameterChangeHandlers;
+import de.intevation.flys.client.client.event.OnMoveEvent;
+import de.intevation.flys.client.client.event.OnMoveHandler;
+import de.intevation.flys.client.client.event.OutputParameterChangeEvent;
+import de.intevation.flys.client.client.event.OutputParameterChangeHandler;
+import de.intevation.flys.client.client.services.CollectionAttributeService;
+import de.intevation.flys.client.client.services.CollectionAttributeServiceAsync;
+
+
+public abstract class ThemePanel
+extends    Canvas
+implements OnMoveHandler, EditCompleteHandler, HasOutputParameterChangeHandlers
+{
+    protected CollectionAttributeServiceAsync updater =
+        GWT.create(CollectionAttributeService.class);
+
+    private FLYSConstants MSG = GWT.create(FLYSConstants.class);
+
+    protected List<OutputParameterChangeHandler> outHandlers;
+
+    protected Collection collection;
+    protected OutputMode mode;
+
+    protected ThemeNavigationPanel navigation;
+    protected ListGrid list;
+
+
+    public ThemePanel(Collection collection, OutputMode mode) {
+        this.collection  = collection;
+        this.mode        = mode;
+        this.list        = new ListGrid();
+        this.outHandlers = new ArrayList<OutputParameterChangeHandler>();
+        this.navigation  = new ThemeNavigationPanel();
+
+        this.navigation.addOnMoveHandler(this);
+    }
+
+
+    public abstract void activateTheme(Theme theme, boolean active);
+
+
+    /**
+     * Replace the current collection with a new one. <b>NOTE: this operation
+     * triggers updateGrid() which modifies the themes in the grid.</b>
+     *
+     * @param collection The new collection object.
+     */
+    protected void setCollection(Collection collection) {
+        this.collection = collection;
+
+        updateGrid();
+    }
+
+
+    /**
+     * Returns the ThemeList of the current collection and output mode.
+     *
+     * @return the current ThemeList.
+     */
+    public ThemeList getThemeList() {
+        return collection.getThemeList(mode.getName());
+    }
+
+
+    /**
+     * Registers a new OutputParameterChangeHandler.
+     *
+     * @param h The new handler.
+     */
+    public void addOutputParameterChangeHandler(OutputParameterChangeHandler h){
+        if (h != null) {
+            outHandlers.add(h);
+        }
+    }
+
+
+    /**
+     * Called when the attribution of an output changed. It informs the
+     * registered handlers about the changes.
+     */
+    protected void fireOutputParameterChanged() {
+        OutputParameterChangeEvent evt = new OutputParameterChangeEvent();
+
+        for (OutputParameterChangeHandler handler: outHandlers) {
+            handler.onOutputParameterChanged(evt);
+        }
+    }
+
+
+    /**
+     * This method is used to clear the current theme grid and add new updated
+     * data.
+     */
+    protected void updateGrid() {
+        GWT.log("ThemePanel.updateGrid");
+
+        clearGrid();
+
+        ThemeList themeList = getThemeList();
+
+        if (themeList == null) {
+            GWT.log("ERROR: No theme list.");
+            return;
+        }
+
+        int count = themeList.getThemeCount();
+
+        for (int i = 1; i <= count; i++) {
+            Theme theme = themeList.getThemeAt(i);
+
+            if (theme == null) {
+                continue;
+            }
+
+            list.addData(new FacetRecord(theme));
+        }
+
+        fireOutputParameterChanged();
+    }
+
+
+    /**
+     * This method triggers the CollectionAttributeService. Based on the current
+     * collectin settings, the attribute of the collection is modified or not.
+     * But in every case, we will get a new collection object - which might be
+     * the same as the current one.
+     */
+    public void updateCollection() {
+        final Config config = Config.getInstance();
+        final String url    = config.getServerUrl();
+        final String loc    = config.getLocale();
+
+        GWT.log("ThemePanel.updateCollection via RPC now");
+
+        // don't forget to enable the panel after the request has finished!
+        disable();
+
+        updater.update(collection, url, loc, new AsyncCallback<Collection>() {
+            public void onFailure(Throwable caught) {
+                GWT.log("Could not update collection attributes.");
+                SC.warn(MSG.getString(caught.getMessage()));
+
+                enable();
+            }
+
+
+            public void onSuccess(Collection collection) {
+                setCollection(collection);
+
+                enable();
+            }
+        });
+    }
+
+
+
+
+    /**
+     * A method that removes all records from theme grid.
+     */
+    protected void clearGrid() {
+        ListGridRecord[] records = list.getRecords();
+
+        if (records == null || records.length == 0) {
+            return;
+        }
+
+        for (ListGridRecord record: records) {
+            list.removeData(record);
+        }
+    }
+
+
+    /**
+     * This method is called after a cell in the theme grid has been modified.
+     *
+     * @param event The event that stores information about the modified record.
+     */
+    @Override
+    public void onEditComplete(EditCompleteEvent event) {
+        GWT.log("Edited record.");
+
+        int         row = event.getRowNum();
+        FacetRecord rec = (FacetRecord) list.getRecord(row);
+
+        activateTheme(rec.getTheme(), rec.getActive());
+
+        updateCollection();
+    }
+
+
+    @Override
+    public void onMove(OnMoveEvent event) {
+        int type = event.getType();
+
+        GWT.log("ThemePanel.onMove: " + type);
+
+        ListGridRecord[] records = list.getSelection();
+
+        if (records == null || records.length == 0) {
+            GWT.log("ThemePanel.onMove: No records selected.");
+            return;
+        }
+
+        switch (type) {
+            case 0: moveRecordsTop(records); break;
+            case 1: moveRecordsUp(records); break;
+            case 2: moveRecordsDown(records); break;
+            case 3: moveRecordsBottom(records); break;
+        }
+
+        updateCollection();
+    }
+
+
+    /**
+     * Moves the selected grid records (themes) to the top of the grid.
+     *
+     * @param records The selected themes in the list. Null not permitted.
+     */
+    protected void moveRecordsTop(ListGridRecord[] records) {
+        ThemeList themeList = getThemeList();
+
+        int idx = 1;
+
+        for (ListGridRecord record: records) {
+            Theme theme = ((FacetRecord) record).getTheme();
+            themeList.setThemePosition(theme, idx++);
+        }
+
+        updateGrid();
+    }
+
+
+    /**
+     * Moves the selected grid records (themes) one step up.
+     *
+     * @param records The selected themes in the list. Null not permitted.
+     */
+    protected void moveRecordsUp(ListGridRecord[] records) {
+        ThemeList themeList = getThemeList();
+
+        int[] newPos = new int[records.length];
+
+        for (int i = 0; i < records.length ; i++) {
+            Theme theme = ((FacetRecord) records[i]).getTheme();
+            newPos[i]   = theme.getPosition() - 1;
+        }
+
+        for (int i = 0; i < records.length ; i++) {
+            Theme theme = ((FacetRecord) records[i]).getTheme();
+            themeList.setThemePosition(theme, newPos[i]);
+        }
+
+        updateGrid();
+    }
+
+
+    /**
+     * Moves the selected grid records (themes) one step down.
+     *
+     * @param records The selected themes in the list. Null not permitted.
+     */
+    protected void moveRecordsDown(ListGridRecord[] records) {
+        ThemeList themeList = getThemeList();
+
+        int[] newPos = new int[records.length];
+
+        for (int i = records.length-1; i >= 0; i--) {
+            Theme theme = ((FacetRecord) records[i]).getTheme();
+            newPos[i] = theme.getPosition()+1;
+        }
+
+        for (int i = records.length-1; i >= 0; i--) {
+            Theme theme = ((FacetRecord) records[i]).getTheme();
+            themeList.setThemePosition(theme, newPos[i]);
+        }
+
+        updateGrid();
+    }
+
+
+    /**
+     * Moves the selected grid records (themes) to the bottom of the grid.
+     *
+     * @param records The selected themes in the list. Null not permitted.
+     */
+    protected void moveRecordsBottom(ListGridRecord[] records) {
+        ThemeList themeList = getThemeList();
+
+        int idx = themeList.getThemeCount();
+
+        for (int i = records.length-1; i >= 0; i--) {
+            Theme theme = ((FacetRecord) records[i]).getTheme();
+            themeList.setThemePosition(theme, idx--);
+        }
+
+        updateGrid();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :