org.eclipse.scout.rt.ui.swt.basic.table.SwtScoutTooltipSupport.java Source code

Introduction

Here is the source code for org.eclipse.scout.rt.ui.swt.basic.table.SwtScoutTooltipSupport.java

Source

/*******************************************************************************
 * Copyright (c) 2010 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/
package org.eclipse.scout.rt.ui.swt.basic.table;

import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.window.DefaultToolTip;
import org.eclipse.jface.window.ToolTip;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;

public class SwtScoutTooltipSupport extends DefaultToolTip {
    private Cell cell;
    private ColumnViewer viewer;

    protected SwtScoutTooltipSupport(ColumnViewer viewer, int style, boolean manualActivation) {
        super(viewer.getControl(), style, manualActivation);
        this.viewer = viewer;
    }

    @Override
    protected Object getToolTipArea(Event event) {
        Table table = (Table) event.widget;
        int columns = table.getColumnCount();
        Point point = new Point(event.x, event.y);
        TableItem item = table.getItem(point);

        if (item != null) {
            for (int i = 0; i < columns; i++) {
                if (item.getBounds(i).contains(point)) {
                    this.cell = new Cell(item, i);
                    return cell;
                }
            }
        }

        return null;
    }

    @Override
    protected Composite createToolTipContentArea(Event event, Composite parent) {
        Composite comp = new Composite(parent, SWT.NONE);
        comp.setLayout(new FillLayout());
        Text b = new Text(comp, SWT.MULTI);
        b.setText(((ITableLabelProvider) viewer.getLabelProvider()).getColumnText(cell.getData(), cell.index));
        // b.setImage(((ITableLabelProvider) viewer.getLabelProvider())
        // .getColumnImage(cell.getData(), cell.index));

        return comp;
    }

    public static void enableFor(ColumnViewer viewer) {
        new SwtScoutTooltipSupport(viewer, ToolTip.NO_RECREATE, false);
    }

    private static class Cell {
        private Item item;
        private int index;

        public Cell(Item item, int index) {
            this.item = item;
            this.index = index;
        }

        public Object getData() {
            return item.getData();
        }

        @Override
        public int hashCode() {
            final int prime = 31;
            int result = 1;
            result = prime * result + index;
            result = prime * result + ((item == null) ? 0 : item.hashCode());
            return result;
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj) {
                return true;
            }
            if (obj == null) {
                return false;
            }
            if (getClass() != obj.getClass()) {
                return false;
            }
            final Cell other = (Cell) obj;
            if (index != other.index) {
                return false;
            }
            if (item == null) {
                if (other.item != null) {
                    return false;
                }
            } else if (!item.equals(other.item)) {
                return false;
            }
            return true;
        }

    }

}