/*******************************************************************************
* Copyright (c) 2008, 2015 Angelo Zerr 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:
* Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
*******************************************************************************/
package org.eclipse.e4.ui.css.swt.helpers;
import org.eclipse.e4.ui.css.core.dom.properties.CSSBorderProperties;
import org.eclipse.e4.ui.css.core.engine.CSSEngine;
import org.eclipse.e4.ui.css.swt.CSSSWTConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Control;
import org.w3c.dom.css.CSSPrimitiveValue;
import org.w3c.dom.css.CSSValue;
/**
* SWT Helper to transform CSS w3c object (org.w3c.dom.css.RGBColor....) into
* SWT object (org.eclipse.swt.graphics.Color...).
*
* @version 1.0.0
* @author <a href="mailto:angelo.zerr@gmail.com">Angelo ZERR</a>
*
*/
public class CSSSWTHelpers {
/*--------------- SWT Font Helper -----------------*/
/*--------------- SWT Cursor Helper -----------------*/
/*--------------- SWT Image Helper -----------------*/
/*--------------- SWT Border Helper -----------------*/
public static PaintListener createBorderPaintListener(final CSSEngine engine,
final Control control) {
return new PaintListener() {
/**
* Converts the specified CSS value into an SWT Color instance. If
* the conversion process fails, <code>null</code> will be returned.
*
* @param value the CSS value to convert
* @return the Color corresponding to the provided RGB values, or <code>null</code> if the conversion process failed
*/
private Color convert(CSSValue value) {
try {
return (Color) engine.convert(value, Color.class, control.getDisplay());
} catch (Exception e) {
engine.handleExceptions(e);
return null;
}
}
@Override
public void paintControl(PaintEvent e) {
CSSBorderProperties border = (CSSBorderProperties) control
.getData(CSSSWTConstants.CONTROL_CSS2BORDER_KEY);
if (border == null) {
return;
}
int width = border.getWidth();
GC gc = e.gc;
CSSPrimitiveValue value = border.getColor();
if (value == null) {
return;
}
Color color = convert(value);
if (color != null) {
gc.setForeground(color);
}
Rectangle rect = control.getBounds();
if (width == 0) {
Rectangle rect1 = new Rectangle(rect.x - width, rect.y
- width, rect.width + 2 * width, rect.height + 2
* width);
gc.fillRectangle(rect1);
} else {
String borderStyle = border.getStyle();
// Top Line
gc.setLineStyle(getLineStyle(borderStyle));
gc.setLineWidth(width);
gc.drawLine(rect.x, rect.y - 1, rect.width + 2 * width,
rect.y - 1);
// Bottom Line
gc.setLineStyle(getLineStyle(borderStyle));
gc.setLineWidth(width);
gc.drawLine(rect.x, rect.y + rect.height + 1, rect.width
+ 2 * width, rect.y + rect.height + 1);
// Left Line
gc.setLineStyle(getLineStyle(borderStyle));
gc.setLineWidth(width);
gc.drawLine(rect.x - 1, rect.y - 1, rect.x - 1, rect.y
+ rect.height + 1);
// Right Line
gc.setLineStyle(getLineStyle(borderStyle));
gc.setLineWidth(width);
gc.drawLine(rect.width + 2 * width, rect.y - 1, rect.width
+ 2 * width, rect.y + rect.height + 1);
}
}
};
}
public static int getLineStyle(String borderStyle) {
if (borderStyle == null) {
return SWT.LINE_SOLID;
}
// one hidden dotted dashed solid double groove ridge inset outset
if ("dashed".equals(borderStyle)) {
return SWT.LINE_DASH;
}
if ("dotted".equals(borderStyle)) {
return SWT.LINE_DOT;
}
return SWT.LINE_SOLID;
}
}