Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.swt / src / org / simantics / browsing / ui / swt / ViewpointSelector.java

diff --git a/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/ViewpointSelector.java b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/ViewpointSelector.java
new file mode 100644 (file)
index 0000000..5e218a1
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/ViewpointSelector.java
@@ -0,0 +1,143 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.swt;\r
+\r
+import java.util.Collection;\r
+\r
+import org.eclipse.jface.layout.GridDataFactory;\r
+import org.eclipse.jface.viewers.IPostSelectionProvider;\r
+import org.eclipse.jface.viewers.ISelection;\r
+import org.eclipse.jface.viewers.ISelectionChangedListener;\r
+import org.eclipse.jface.viewers.SelectionChangedEvent;\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.events.SelectionEvent;\r
+import org.eclipse.swt.events.SelectionListener;\r
+import org.eclipse.swt.graphics.Font;\r
+import org.eclipse.swt.graphics.FontData;\r
+import org.eclipse.swt.widgets.Combo;\r
+import org.eclipse.swt.widgets.Composite;\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.GraphExplorer;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.common.processors.UserSelectedViewpointFactoryQueryProcessor;\r
+import org.simantics.browsing.ui.content.ViewpointFactory;\r
+import org.simantics.db.layer0.SelectionHints;\r
+import org.simantics.utils.datastructures.Pair;\r
+import org.simantics.utils.ui.ISelectionUtils;\r
+import org.simantics.utils.ui.LayoutUtils;\r
+\r
+/**\r
+ * TODO: support multiselection within the IGraphExplorer\r
+ */\r
+public class ViewpointSelector extends Composite {\r
+\r
+    Font smallFont;\r
+\r
+    public ViewpointSelector(final GraphExplorer explorer, final UserSelectedViewpointFactoryQueryProcessor queryProcessor, Composite parent, int style) {\r
+\r
+        super(parent, style);\r
+\r
+        setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create());\r
+\r
+        setLayout(LayoutUtils.createNoBorderGridLayout(1, false));\r
+\r
+        final Combo combo = new Combo(this, SWT.READ_ONLY);\r
+\r
+        Font initialFont = combo.getFont();\r
+        FontData[] fontData = initialFont.getFontData();\r
+        for (int i = 0; i < fontData.length; i++) {\r
+            fontData[i].setHeight(fontData[i].getHeight() - 1);\r
+        }\r
+        smallFont = new Font(getDisplay(), fontData);\r
+        combo.setFont(smallFont);\r
+\r
+        combo.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create());\r
+        combo.add("-- No viewpoints --");\r
+        combo.select(0);\r
+\r
+        combo.addSelectionListener(new SelectionListener() {\r
+\r
+            @Override\r
+            public void widgetDefaultSelected(SelectionEvent e) {\r
+                widgetSelected(e);\r
+            }\r
+\r
+            @SuppressWarnings("unchecked")\r
+            @Override\r
+            public void widgetSelected(SelectionEvent e) {\r
+\r
+                int index = combo.getSelectionIndex();\r
+\r
+                Pair<ViewpointFactory, NodeContext> pair =\r
+                    (Pair<ViewpointFactory, NodeContext>)combo.getData(String.valueOf(index));\r
+                if (pair == null)\r
+                    return;\r
+\r
+                queryProcessor.select(pair.second, pair.first);\r
+\r
+            }\r
+\r
+        });\r
+\r
+        IPostSelectionProvider selectionProvider = (IPostSelectionProvider)explorer.getAdapter(IPostSelectionProvider.class);\r
+\r
+        selectionProvider.addSelectionChangedListener(new ISelectionChangedListener() {\r
+\r
+            @Override\r
+            public void selectionChanged(SelectionChangedEvent event) {\r
+\r
+                ISelection selection = event.getSelection();\r
+                NodeContext context = ISelectionUtils.getSinglePossibleKey(selection, SelectionHints.KEY_MAIN, NodeContext.class);\r
+\r
+                if(context == null) {\r
+                    context = explorer.getRoot();\r
+                }\r
+\r
+                assert(context != null);\r
+\r
+                Collection<ViewpointFactory> factories = explorer.query(context, BuiltinKeys.VIEWPOINT_FACTORIES);\r
+\r
+                ViewpointFactory oldSelection = queryProcessor.getSelection(context);\r
+\r
+                combo.removeAll();\r
+                if(factories != null) {\r
+                    for(ViewpointFactory f : factories) {\r
+                        int index = combo.getItemCount();\r
+                        combo.add(f.toString());\r
+                        combo.setData(String.valueOf(index), new Pair<ViewpointFactory, NodeContext>(f, context));\r
+                        if(f == oldSelection) {\r
+                            combo.select(index);\r
+                        }\r
+                    }\r
+                }\r
+                if(combo.getItemCount() == 0) {\r
+                    combo.add("-- No viewpoints --");\r
+                }\r
+                if(combo.getSelectionIndex() == -1) {\r
+                    combo.select(0);\r
+                }\r
+\r
+            }\r
+\r
+        });\r
+\r
+    }\r
+\r
+    @Override\r
+    public void dispose() {\r
+        if (isDisposed())\r
+            return;\r
+        smallFont.dispose();\r
+        super.dispose();\r
+    }\r
+\r
+}\r