| /******************************************************************************* |
| * Copyright (c) 2007, 2008 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation |
| * - fix for bug 183850, 182652, 182800, 215069 |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.viewers; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Rectangle; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Listener; |
| |
| /** |
| * A concrete implementation of {@link FocusCellHighlighter} using by setting |
| * the control into owner draw mode and highlighting the currently selected |
| * cell. To make the use this class you should create the control with the |
| * {@link SWT#FULL_SELECTION} bit set |
| * |
| * This class can be subclassed to configure how the coloring of the selected |
| * cell. |
| * |
| * @since 3.3 |
| * |
| */ |
| public class FocusCellOwnerDrawHighlighter extends FocusCellHighlighter { |
| /** |
| * Create a new instance which can be passed to a |
| * {@link TreeViewerFocusCellManager} |
| * |
| * @param viewer |
| * the viewer |
| */ |
| public FocusCellOwnerDrawHighlighter(ColumnViewer viewer) { |
| super(viewer); |
| hookListener(viewer); |
| } |
| |
| private void markFocusedCell(Event event, ViewerCell cell) { |
| Color background = (cell.getControl().isFocusControl()) ? getSelectedCellBackgroundColor(cell) |
| : getSelectedCellBackgroundColorNoFocus(cell); |
| Color foreground = (cell.getControl().isFocusControl()) ? getSelectedCellForegroundColor(cell) |
| : getSelectedCellForegroundColorNoFocus(cell); |
| |
| if (foreground != null || background != null || onlyTextHighlighting(cell)) { |
| GC gc = event.gc; |
| |
| if (background == null) { |
| background = cell.getItem().getDisplay().getSystemColor( |
| SWT.COLOR_LIST_SELECTION); |
| } |
| |
| if (foreground == null) { |
| foreground = cell.getItem().getDisplay().getSystemColor( |
| SWT.COLOR_LIST_SELECTION_TEXT); |
| } |
| |
| gc.setBackground(background); |
| gc.setForeground(foreground); |
| |
| if (onlyTextHighlighting(cell)) { |
| Rectangle area = event.getBounds(); |
| Rectangle rect = cell.getTextBounds(); |
| if( rect != null ) { |
| area.x = rect.x; |
| } |
| gc.fillRectangle(area); |
| } else { |
| gc.fillRectangle(event.getBounds()); |
| } |
| |
| event.detail &= ~SWT.SELECTED; |
| } |
| } |
| |
| private void removeSelectionInformation(Event event, ViewerCell cell) { |
| GC gc = event.gc; |
| gc.setBackground(cell.getViewerRow().getBackground( |
| cell.getColumnIndex())); |
| gc.setForeground(cell.getViewerRow().getForeground( |
| cell.getColumnIndex())); |
| gc.fillRectangle(cell.getBounds()); |
| event.detail &= ~SWT.SELECTED; |
| } |
| |
| private void hookListener(final ColumnViewer viewer) { |
| |
| Listener listener = new Listener() { |
| |
| public void handleEvent(Event event) { |
| if ((event.detail & SWT.SELECTED) > 0) { |
| ViewerCell focusCell = getFocusCell(); |
| ViewerRow row = viewer.getViewerRowFromItem(event.item); |
| |
| Assert |
| .isNotNull(row, |
| "Internal structure invalid. Item without associated row is not possible."); //$NON-NLS-1$ |
| |
| ViewerCell cell = row.getCell(event.index); |
| |
| if (focusCell == null || !cell.equals(focusCell)) { |
| removeSelectionInformation(event, cell); |
| } else { |
| markFocusedCell(event, cell); |
| } |
| } |
| } |
| |
| }; |
| viewer.getControl().addListener(SWT.EraseItem, listener); |
| } |
| |
| /** |
| * The color to use when rendering the background of the selected cell when |
| * the control has the input focus |
| * |
| * @param cell |
| * the cell which is colored |
| * @return the color or <code>null</code> to use the default |
| */ |
| protected Color getSelectedCellBackgroundColor(ViewerCell cell) { |
| return null; |
| } |
| |
| /** |
| * The color to use when rendering the foreground (=text) of the selected |
| * cell when the control has the input focus |
| * |
| * @param cell |
| * the cell which is colored |
| * @return the color or <code>null</code> to use the default |
| */ |
| protected Color getSelectedCellForegroundColor(ViewerCell cell) { |
| return null; |
| } |
| |
| /** |
| * The color to use when rendering the foreground (=text) of the selected |
| * cell when the control has <b>no</b> input focus |
| * |
| * @param cell |
| * the cell which is colored |
| * @return the color or <code>null</code> to use the same used when |
| * control has focus |
| * @since 3.4 |
| */ |
| protected Color getSelectedCellForegroundColorNoFocus(ViewerCell cell) { |
| return null; |
| } |
| |
| /** |
| * The color to use when rendering the background of the selected cell when |
| * the control has <b>no</b> input focus |
| * |
| * @param cell |
| * the cell which is colored |
| * @return the color or <code>null</code> to use the same used when |
| * control has focus |
| * @since 3.4 |
| */ |
| protected Color getSelectedCellBackgroundColorNoFocus(ViewerCell cell) { |
| return null; |
| } |
| |
| /** |
| * Controls whether the whole cell or only the text-area is highlighted |
| * |
| * @param cell |
| * the cell which is highlighted |
| * @return <code>true</code> if only the text area should be highlighted |
| * @since 3.4 |
| */ |
| protected boolean onlyTextHighlighting(ViewerCell cell) { |
| return false; |
| } |
| |
| protected void focusCellChanged(ViewerCell newCell, ViewerCell oldCell) { |
| super.focusCellChanged(newCell, oldCell); |
| |
| // Redraw new area |
| if (newCell != null) { |
| Rectangle rect = newCell.getBounds(); |
| int x = newCell.getColumnIndex() == 0 ? 0 : rect.x; |
| int width = newCell.getColumnIndex() == 0 ? rect.x + rect.width |
| : rect.width; |
| // 1 is a fix for Linux-GTK |
| newCell.getControl().redraw(x, rect.y - 1, width, rect.height + 1, |
| true); |
| } |
| |
| if (oldCell != null) { |
| Rectangle rect = oldCell.getBounds(); |
| int x = oldCell.getColumnIndex() == 0 ? 0 : rect.x; |
| int width = oldCell.getColumnIndex() == 0 ? rect.x + rect.width |
| : rect.width; |
| // 1 is a fix for Linux-GTK |
| oldCell.getControl().redraw(x, rect.y - 1, width, rect.height + 1, |
| true); |
| } |
| } |
| } |