Sync git svn branch with SVN repository r33334.

[simantics/platform.git] / bundles / org.simantics.browsing.ui.nattable / src / org / simantics / browsing / ui / nattable / KeyToSelectionAdapter.java

diff --git a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/KeyToSelectionAdapter.java b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/KeyToSelectionAdapter.java
new file mode 100644 (file)
index 0000000..9d43c35
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/KeyToSelectionAdapter.java
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+package org.simantics.browsing.ui.nattable;\r
+\r
+import java.util.Collection;\r
+import java.util.List;\r
+import java.util.regex.Pattern;\r
+\r
+import org.eclipse.jface.viewers.IStructuredSelection;\r
+import org.eclipse.nebula.widgets.nattable.NatTable;\r
+import org.eclipse.swt.events.KeyAdapter;\r
+import org.eclipse.swt.events.KeyEvent;\r
+import org.simantics.browsing.ui.GraphExplorer;\r
+import org.simantics.utils.ui.AdaptionUtils;\r
+\r
+/**\r
+ * Selects tree items based on pressed key events.<p>\r
+ * \r
+ * The default implementation of SWT.Tree (Windows?) uses only the the first column when matching the items.<p>\r
+ * \r
+ * This implementation checks all columns. Override <pre>matches(), matchesColumn()</pre> for customized behavior.<p>\r
+ * \r
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
+ *\r
+ */\r
+public class KeyToSelectionAdapter extends KeyAdapter {\r
+\r
+       private static final int KEY_INPUT_DELAY = 500;\r
+       \r
+    private final NatTableGraphExplorer          explorer;\r
+\r
+    private String matcher = "";\r
+    private int prevEvent = 0;\r
+    private int columns = 0;\r
+        \r
+    protected Pattern alphaNum;\r
+    \r
+    /**\r
+     * @param contextProvider\r
+     * @param explorer\r
+     */\r
+    public KeyToSelectionAdapter(GraphExplorer explorer) {\r
+        assert explorer != null;\r
+\r
+        this.explorer = (NatTableGraphExplorer)explorer;\r
+        this.alphaNum = Pattern.compile("\\p{Alnum}");\r
+    }\r
+\r
+    @Override\r
+    public void keyPressed(KeyEvent e) {\r
+       if (explorer.isDisposed())\r
+            return;\r
+\r
+         \r
+         if (!alphaNum.matcher(Character.toString(e.character)).matches())\r
+                return;\r
+         // concatenate / replace matcher.\r
+         if ((e.time - prevEvent) > KEY_INPUT_DELAY )\r
+                matcher = "";\r
+        prevEvent = e.time;\r
+        matcher = matcher += Character.toString(e.character);\r
+\r
+        \r
+        //TreeItem item = null;\r
+        NatTable tree = explorer.getControl();\r
+        columns = explorer.getColumns().length;\r
+        \r
+        IStructuredSelection sel = (IStructuredSelection)explorer.getWidgetSelection();\r
+        Collection<RowSelectionItem> selected = AdaptionUtils.adaptToCollection(sel, RowSelectionItem.class);\r
+        \r
+         \r
+        TreeNode item = find(tree, selected);\r
+        \r
+        if (item == null && matcher.length() > 1) {\r
+                matcher = matcher.substring(matcher.length()-1);\r
+                item = find(tree, selected);\r
+        }\r
+        \r
+        if (item != null) {\r
+                explorer.select(item);\r
+                explorer.show(item);\r
+//                      tree.select(item);\r
+//                      tree.showItem(item);\r
+                \r
+                       \r
+                } \r
+        // without this the default handling would take over.\r
+        e.doit = false;\r
+    }\r
+    \r
+    private TreeNode previous = null;\r
+    private boolean foundPrev = false;\r
+    \r
+       private TreeNode find(NatTable tree, Collection<RowSelectionItem> selected) {\r
+               TreeNode item = null;\r
+\r
+               List<TreeNode> items = explorer.getItems();\r
+               \r
+               if (selected.size() == 0) {\r
+                       previous = null;\r
+                       foundPrev = true;\r
+                       item = findItem(items);\r
+\r
+               } else {\r
+                       previous = selected.iterator().next().item;\r
+                       foundPrev = false;\r
+                       item = findItem(items);\r
+                       if (item == null) {\r
+                               previous = null;\r
+                               foundPrev = true;\r
+                               item = findItem(items);\r
+                       }\r
+               }\r
+               return item;\r
+       }\r
+    \r
+    private TreeNode findItem(List<TreeNode> items) {\r
+       for (int i = 0; i < items.size(); i++) {\r
+               TreeNode item = items.get(i);\r
+               if (item != previous) {\r
+                       if (foundPrev && matches(item, columns, matcher))\r
+                               return item;\r
+                       \r
+               } else {\r
+                       foundPrev = true;\r
+               }\r
+       }\r
+       return null;\r
+    }\r
+    \r
+    \r
+    /**\r
+     * \r
+     * @param item\r
+     * @param depth Depth of the item in the tree.\r
+     * @param columns Number of columns.\r
+     * @param string Matching string.\r
+     * @return\r
+     */\r
+    protected boolean matches(TreeNode item, int columns, String matcher) {\r
+       for (int c = 0; c < columns; c++) {     \r
+                       if (matchesColumn(item, c, matcher)) {\r
+                               return true;\r
+                       }\r
+               }\r
+       return false;\r
+    }\r
+    \r
+    /**\r
+     * \r
+     * @param item\r
+     * @param column\r
+     * @param matcher\r
+     * @return\r
+     */\r
+    protected boolean matchesColumn(TreeNode item, int column, String matcher) {\r
+       String text = item.getValueString(column);\r
+               if (text.toLowerCase().startsWith(matcher)) {\r
+                       return true;\r
+               }\r
+               return false;\r
+    }\r
+\r
+\r
+}\r