/*
* DBeaver - Universal Database Manager
* Copyright (C) 2010-2017 Serge Rider (serge@jkiss.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jkiss.dbeaver.ui.controls;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TreeEditor;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.jkiss.dbeaver.core.DBeaverUI;
import org.jkiss.dbeaver.ui.UIUtils;
/**
* Tree editor
*/
public abstract class CustomTreeEditor implements MouseListener, TraverseListener {
private final Tree tree;
private final TreeEditor treeEditor;
private int columnIndex;
protected int firstTraverseIndex = -1, lastTraverseIndex = -1;
public CustomTreeEditor(Tree tree) {
this.tree = tree;
treeEditor = new TreeEditor(tree);
treeEditor.horizontalAlignment = SWT.CENTER;
treeEditor.verticalAlignment = SWT.TOP;
treeEditor.grabHorizontal = true;
treeEditor.minimumWidth = 50;
tree.addMouseListener(this);
tree.addTraverseListener(this);
}
@Override
public void mouseDoubleClick(MouseEvent e) {
}
@Override
public void mouseDown(MouseEvent e) {
}
@Override
public void mouseUp(MouseEvent e) {
if (e.button != 1) {
// Only on left click
return;
}
final TreeItem item = tree.getItem(new Point(e.x, e.y));
if (item != null) {
columnIndex = UIUtils.getColumnAtPos(item, e.x, e.y);
DBeaverUI.asyncExec(new Runnable() {
@Override
public void run() {
showEditor(item);
}
});
}
}
public void showEditor(TreeItem item) {
closeEditor();
tree.showItem(item);
final Control editor = createEditor(tree, columnIndex, item);
if (editor == null) {
return;
}
editor.setFocus();
editor.addFocusListener(new FocusAdapter() {
@Override
public void focusLost(FocusEvent e) {
saveEditorValue(editor, columnIndex, treeEditor.getItem());
closeEditor();
}
});
editor.addTraverseListener(this);
treeEditor.setEditor(editor, item, columnIndex);
}
public void closeEditor() {
Control oldEditor = this.treeEditor.getEditor();
if (oldEditor != null) oldEditor.dispose();
}
@Override
public void keyTraversed(TraverseEvent e)
{
Control editor = treeEditor.getEditor();
if (editor != null && editor.isDisposed()) {
editor = null;
}
if (e.detail == SWT.TRAVERSE_RETURN) {
if (editor != null) {
saveEditorValue(editor, columnIndex, treeEditor.getItem());
closeEditor();
} else {
TreeItem[] selection = tree.getSelection();
if (selection != null && selection.length >= 1) {
showEditor(selection[0]);
}
}
e.doit = false;
e.detail = SWT.TRAVERSE_NONE;
} else if (e.detail == SWT.TRAVERSE_TAB_NEXT && editor != null) {
TreeItem item = treeEditor.getItem();
if (item != null) {
saveEditorValue(editor, columnIndex, item);
closeEditor();
int lastColumn = lastTraverseIndex > 0 ? lastTraverseIndex : tree.getColumnCount() - 1;
if (columnIndex < lastColumn) {
columnIndex++;
} else {
item = UIUtils.getNextTreeItem(tree, treeEditor.getItem());
if (item == null && tree.getItemCount() > 0) {
item = tree.getItem(0);
}
if (item != null) {
columnIndex = firstTraverseIndex > 0 ? firstTraverseIndex : 0;
} else {
return;
}
}
showEditor(item);
tree.setSelection(item);
e.doit = false;
e.detail = SWT.TRAVERSE_NONE;
}
} else if (e.detail == SWT.TRAVERSE_ESCAPE && editor != null) {
closeEditor();
e.doit = false;
e.detail = SWT.TRAVERSE_NONE;
}
}
protected abstract Control createEditor(Tree tree, int index, TreeItem item);
protected abstract void saveEditorValue(Control control, int index, TreeItem item);
}