-package org.simantics.browsing.ui.swt;\r
-\r
-import java.util.regex.Pattern;\r
-\r
-import org.eclipse.swt.events.KeyAdapter;\r
-import org.eclipse.swt.events.KeyEvent;\r
-import org.eclipse.swt.widgets.Tree;\r
-import org.eclipse.swt.widgets.TreeItem;\r
-import org.simantics.browsing.ui.GraphExplorer;\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 GraphExplorer 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 = 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
- TreeItem item = null;\r
- Tree tree = explorer.getControl();\r
- columns = tree.getColumnCount();\r
- TreeItem[] selected = tree.getSelection();\r
- \r
- 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
- tree.select(item);\r
- tree.showItem(item);\r
- \r
- } \r
- // without this the default handling would take over.\r
- e.doit = false;\r
- }\r
- \r
- private TreeItem previous = null;\r
- private boolean foundPrev = false;\r
- \r
- private TreeItem find(Tree tree, TreeItem[] selected) {\r
- TreeItem item = null;\r
-\r
- TreeItem items[] = tree.getItems();\r
- if (selected.length == 0) {\r
- previous = null;\r
- foundPrev = true;\r
- item = findItem(items, 0);\r
-\r
- } else {\r
- previous = selected[0];\r
- foundPrev = false;\r
- item = findItem(items, 0);\r
- if (item == null) {\r
- previous = null;\r
- foundPrev = true;\r
- item = findItem(items, 0);\r
- }\r
- }\r
- return item;\r
- }\r
- \r
- private TreeItem findItem(TreeItem items[], int depth) {\r
- for (int i = 0; i < items.length; i++) {\r
- TreeItem item = items[i];\r
- if (item != previous) {\r
- if (foundPrev && matches(item, depth, columns, matcher))\r
- return item;\r
- \r
- } else {\r
- foundPrev = true;\r
- }\r
- TreeItem childItem = findItem(item.getItems(),depth+1); \r
- if (childItem != null)\r
- return childItem;\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(TreeItem item, int depth, 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(TreeItem item, int column, String matcher) {\r
- String text = item.getText(column);\r
- if (text.toLowerCase().startsWith(matcher)) {\r
- return true;\r
- }\r
- return false;\r
- }\r
-\r
-\r
-}\r
+package org.simantics.browsing.ui.swt;
+
+import java.util.regex.Pattern;
+
+import org.eclipse.swt.events.KeyAdapter;
+import org.eclipse.swt.events.KeyEvent;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeItem;
+import org.simantics.browsing.ui.GraphExplorer;
+
+/**
+ * Selects tree items based on pressed key events.<p>
+ *
+ * The default implementation of SWT.Tree (Windows?) uses only the the first column when matching the items.<p>
+ *
+ * This implementation checks all columns. Override <pre>matches(), matchesColumn()</pre> for customized behavior.<p>
+ *
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
+ *
+ */
+public class KeyToSelectionAdapter extends KeyAdapter {
+
+ private static final int KEY_INPUT_DELAY = 500;
+
+ private final GraphExplorer explorer;
+
+ private String matcher = "";
+ private int prevEvent = 0;
+ private int columns = 0;
+
+ protected Pattern alphaNum;
+
+ /**
+ * @param contextProvider
+ * @param explorer
+ */
+ public KeyToSelectionAdapter(GraphExplorer explorer) {
+ assert explorer != null;
+
+ this.explorer = explorer;
+ this.alphaNum = Pattern.compile("\\p{Alnum}");
+ }
+
+ @Override
+ public void keyPressed(KeyEvent e) {
+ if (explorer.isDisposed())
+ return;
+
+
+ if (!alphaNum.matcher(Character.toString(e.character)).matches())
+ return;
+ // concatenate / replace matcher.
+ if ((e.time - prevEvent) > KEY_INPUT_DELAY )
+ matcher = "";
+ prevEvent = e.time;
+ matcher = matcher += Character.toString(e.character);
+
+ TreeItem item = null;
+ Tree tree = explorer.getControl();
+ columns = tree.getColumnCount();
+ TreeItem[] selected = tree.getSelection();
+
+ item = find(tree, selected);
+
+ if (item == null && matcher.length() > 1) {
+ matcher = matcher.substring(matcher.length()-1);
+ item = find(tree, selected);
+ }
+
+ if (item != null) {
+ tree.select(item);
+ tree.showItem(item);
+
+ }
+ // without this the default handling would take over.
+ e.doit = false;
+ }
+
+ private TreeItem previous = null;
+ private boolean foundPrev = false;
+
+ private TreeItem find(Tree tree, TreeItem[] selected) {
+ TreeItem item = null;
+
+ TreeItem items[] = tree.getItems();
+ if (selected.length == 0) {
+ previous = null;
+ foundPrev = true;
+ item = findItem(items, 0);
+
+ } else {
+ previous = selected[0];
+ foundPrev = false;
+ item = findItem(items, 0);
+ if (item == null) {
+ previous = null;
+ foundPrev = true;
+ item = findItem(items, 0);
+ }
+ }
+ return item;
+ }
+
+ private TreeItem findItem(TreeItem items[], int depth) {
+ for (int i = 0; i < items.length; i++) {
+ TreeItem item = items[i];
+ if (item != previous) {
+ if (foundPrev && matches(item, depth, columns, matcher))
+ return item;
+
+ } else {
+ foundPrev = true;
+ }
+ TreeItem childItem = findItem(item.getItems(),depth+1);
+ if (childItem != null)
+ return childItem;
+ }
+ return null;
+ }
+
+
+ /**
+ *
+ * @param item
+ * @param depth Depth of the item in the tree.
+ * @param columns Number of columns.
+ * @param string Matching string.
+ * @return
+ */
+ protected boolean matches(TreeItem item, int depth, int columns, String matcher) {
+ for (int c = 0; c < columns; c++) {
+ if (matchesColumn(item, c, matcher)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ *
+ * @param item
+ * @param column
+ * @param matcher
+ * @return
+ */
+ protected boolean matchesColumn(TreeItem item, int column, String matcher) {
+ String text = item.getText(column);
+ if (text.toLowerCase().startsWith(matcher)) {
+ return true;
+ }
+ return false;
+ }
+
+
+}
Code Review / simantics / platform.git / blobdiff