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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
*
* 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:
* Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.nattable.painter;
import java.util.Collection;
import java.util.Iterator;
import org.eclipse.nebula.widgets.nattable.config.IConfigRegistry;
import org.eclipse.nebula.widgets.nattable.layer.ILayer;
import org.eclipse.nebula.widgets.nattable.layer.cell.ILayerCell;
import org.eclipse.nebula.widgets.nattable.painter.cell.TextPainter;
import org.eclipse.nebula.widgets.nattable.resize.command.RowResizeCommand;
import org.eclipse.nebula.widgets.nattable.style.CellStyleUtil;
import org.eclipse.nebula.widgets.nattable.style.IStyle;
import org.eclipse.nebula.widgets.nattable.util.GUIHelper;
import org.eclipse.papyrus.infra.nattable.model.nattable.nattableproblem.Problem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Rectangle;
/**
*
* This cell painter draws waves above the displayed text when the cell contains one or several problem
*
*/
public class CellPainterWithUnderlinedError extends TextPainter {
/**
* the offset used to do the underline with "waves"
*/
final private int[] yErrorOffsets = { 0, 1, 2, 1 };
/**
*
* Constructor.
*
* @param wrapText
* @param paintBg
*/
public CellPainterWithUnderlinedError(boolean wrapText, boolean paintBg) {
super(wrapText, paintBg);
}
/**
*
* @see org.eclipse.nebula.widgets.nattable.painter.cell.TextPainter#paintCell(org.eclipse.nebula.widgets.nattable.layer.cell.ILayerCell,
* org.eclipse.swt.graphics.GC, org.eclipse.swt.graphics.Rectangle, org.eclipse.nebula.widgets.nattable.config.IConfigRegistry)
*
* @param cell
* @param gc
* @param rectangle
* @param configRegistry
*
* Method duplcated from super class, to allow to use a specific underline style for error
*/
@Override
public void paintCell(final ILayerCell cell, GC gc, final Rectangle rectangle, final IConfigRegistry configRegistry) {
if(paintBg) {
super.paintCell(cell, gc, rectangle, configRegistry);
}
if(paintFg) {
Rectangle originalClipping = gc.getClipping();
gc.setClipping(rectangle.intersection(originalClipping));
IStyle cellStyle = CellStyleUtil.getCellStyle(cell, configRegistry);
setupGCFromConfig(gc, cellStyle);
boolean underline = renderUnderlined(cellStyle);
boolean strikethrough = renderStrikethrough(cellStyle);
boolean hasError = hasError(cell);
int fontHeight = gc.getFontMetrics().getHeight();
String text = convertDataType(cell, configRegistry);
// Draw Text
text = getTextToDisplay(cell, gc, rectangle.width, text);
int numberOfNewLines = getNumberOfNewLines(text);
//if the content height is bigger than the available row height
//we're extending the row height (only if word wrapping is enabled)
int contentHeight = (fontHeight * numberOfNewLines) + (spacing * 2);
int contentToCellDiff = (cell.getBounds().height - rectangle.height);
if(performRowResize(contentHeight, rectangle)) {
ILayer layer = cell.getLayer();
layer.doCommand(new RowResizeCommand(layer, cell.getRowPosition(), contentHeight + contentToCellDiff));
}
if(numberOfNewLines == 1) {
int contentWidth = Math.min(getLengthFromCache(gc, text), rectangle.width);
gc.drawText(text, rectangle.x + CellStyleUtil.getHorizontalAlignmentPadding(cellStyle, rectangle, contentWidth) + spacing, rectangle.y + CellStyleUtil.getVerticalAlignmentPadding(cellStyle, rectangle, contentHeight) + spacing, SWT.DRAW_TRANSPARENT | SWT.DRAW_DELIMITER);
if(hasError || underline || strikethrough) {
//start x of line = start x of text
int x = rectangle.x + CellStyleUtil.getHorizontalAlignmentPadding(cellStyle, rectangle, contentWidth) + spacing;
//y = start y of text
int y = rectangle.y + CellStyleUtil.getVerticalAlignmentPadding(cellStyle, rectangle, contentHeight) + spacing;
if(hasError) {
//y = start y of text + font height
// - half of the font descent so the underline is between the baseline and the bottom
int underlineY = y + fontHeight - (gc.getFontMetrics().getDescent() / 2);
Color previousColor = gc.getForeground();
gc.setForeground(GUIHelper.COLOR_RED);
int startX = x;
underlineY--;
int index = 0;
while(startX <= (x + gc.textExtent(text).x)) {
gc.drawPoint(startX, underlineY + this.yErrorOffsets[(index % 4)]);
index++;
startX++;
}
gc.setForeground(previousColor);
} else {
//check and draw underline and strikethrough separately so it is possible to combine both
if(underline) {
//y = start y of text + font height
// - half of the font descent so the underline is between the baseline and the bottom
int underlineY = y + fontHeight - (gc.getFontMetrics().getDescent() / 2);
gc.drawLine(x, underlineY, x + gc.textExtent(text).x, underlineY);
}
if(strikethrough) {
//y = start y of text + half of font height + ascent so lower case characters are
//also strikethrough
int strikeY = y + (fontHeight / 2) + (gc.getFontMetrics().getLeading() / 2);
gc.drawLine(x, strikeY, x + gc.textExtent(text).x, strikeY);
}
}
}
} else {
//draw every line by itself because of the alignment, otherwise the whole text
//is always aligned right
int yStartPos = rectangle.y + CellStyleUtil.getVerticalAlignmentPadding(cellStyle, rectangle, contentHeight);
String[] lines = text.split("\n"); //$NON-NLS-1$
for(String line : lines) {
int lineContentWidth = Math.min(getLengthFromCache(gc, line), rectangle.width);
gc.drawText(line, rectangle.x + CellStyleUtil.getHorizontalAlignmentPadding(cellStyle, rectangle, lineContentWidth) + spacing, yStartPos + spacing, SWT.DRAW_TRANSPARENT | SWT.DRAW_DELIMITER);
if(hasError || underline || strikethrough) {
//start x of line = start x of text
int x = rectangle.x + CellStyleUtil.getHorizontalAlignmentPadding(cellStyle, rectangle, lineContentWidth) + spacing;
//y = start y of text
int y = yStartPos + spacing;
if(hasError) {
int underlineY = y + fontHeight - (gc.getFontMetrics().getDescent() / 2);
Color previousColor = gc.getForeground();
gc.setForeground(GUIHelper.COLOR_RED);
int startX = x;
underlineY--;
int index = 0;
while(startX <= (x + gc.textExtent(line).x)) {
gc.drawPoint(startX, underlineY + this.yErrorOffsets[(index % 4)]);
index++;
startX++;
}
gc.setForeground(previousColor);
} else {
//check and draw underline and strikethrough separately so it is possible to combine both
if(underline) {
//y = start y of text + font height
// - half of the font descent so the underline is between the baseline and the bottom
int underlineY = y + fontHeight - (gc.getFontMetrics().getDescent() / 2);
gc.drawLine(x, underlineY, x + gc.textExtent(line).x, underlineY);
}
if(strikethrough) {
//y = start y of text + half of font height + ascent so lower case characters are
//also strikethrough
int strikeY = y + (fontHeight / 2) + (gc.getFontMetrics().getLeading() / 2);
gc.drawLine(x, strikeY, x + gc.textExtent(line).x, strikeY);
}
}
}
//after every line calculate the y start pos new
yStartPos += fontHeight;
}
}
gc.setClipping(originalClipping);
}
}
/**
*
* @param cell
* a cell
* @return
* <code>true</code> if the cell contents a Problem
*/
protected boolean hasError(final ILayerCell cell) {
Object value = cell.getDataValue();
boolean hasError = false;
if(value instanceof Problem) {
hasError = true;
} else if(value instanceof Collection<?>) {
final Iterator<?> iter = ((Collection<?>)value).iterator();
while(!hasError && iter.hasNext()) {
hasError = iter.next() instanceof Problem;
}
}
return hasError;
}
}
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