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/*******************************************************************************
* Copyright (c) 2004, 2009 Tasktop Technologies 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:
* Benjamin Pasero - initial API and implementation
* Tasktop Technologies - improvements
*******************************************************************************/
package org.eclipse.mylyn.internal.commons.ui;
import org.eclipse.jface.resource.DeviceResourceException;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.mylyn.internal.provisional.commons.ui.AbstractNotificationPopup;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Display;
/**
* Helper Class to create the colors for the {@link AbstractNotificationPopup}.
* <p>
* Note: Copied from FormColors of UI Forms.
* </p>
*
* @author Benjamin Pasero (initial contribution from RSSOwl, see bug 177974)
* @author Mik Kersten
*/
public class NotificationPopupColors {
private final Display display;
private Color titleText;
private Color gradientBegin;
private Color gradientEnd;
private Color border;
private final ResourceManager resourceManager;
public NotificationPopupColors(Display display, ResourceManager resourceManager) {
this.display = display;
this.resourceManager = resourceManager;
createColors();
}
private void createColors() {
createBorderColor();
createGradientColors();
// previously used SWT.COLOR_TITLE_INACTIVE_FOREGROUND, but too light on Windows XP
titleText = getColor(resourceManager, getSystemColor(SWT.COLOR_WIDGET_DARK_SHADOW));
}
public Color getGradientBegin() {
return gradientBegin;
}
public Color getGradientEnd() {
return gradientEnd;
}
public Color getBorder() {
return border;
}
public Color getTitleText() {
return titleText;
}
private void createBorderColor() {
RGB tbBorder = getSystemColor(SWT.COLOR_TITLE_BACKGROUND);
RGB bg = getImpliedBackground().getRGB();
// Group 1
// Rule: If at least 2 of the RGB values are equal to or between 180 and
// 255, then apply specified opacity for Group 1
// Examples: Vista, XP Silver, Wn High Con #2
// Keyline = TITLE_BACKGROUND @ 70% Opacity over LIST_BACKGROUND
if (testTwoPrimaryColors(tbBorder, 179, 256)) {
tbBorder = blend(tbBorder, bg, 70);
} else if (testTwoPrimaryColors(tbBorder, 120, 180)) {
tbBorder = blend(tbBorder, bg, 50);
} else {
tbBorder = blend(tbBorder, bg, 30);
}
border = getColor(resourceManager, tbBorder);
}
private void createGradientColors() {
RGB titleBg = getSystemColor(SWT.COLOR_TITLE_BACKGROUND);
Color bgColor = getImpliedBackground();
RGB bg = bgColor.getRGB();
RGB bottom, top;
// Group 1
// Rule: If at least 2 of the RGB values are equal to or between 180 and
// 255, then apply specified opacity for Group 1
// Examples: Vista, XP Silver, Wn High Con #2
// Gradient Bottom = TITLE_BACKGROUND @ 30% Opacity over LIST_BACKGROUND
// Gradient Top = TITLE BACKGROUND @ 0% Opacity over LIST_BACKGROUND
if (testTwoPrimaryColors(titleBg, 179, 256)) {
bottom = blend(titleBg, bg, 30);
top = bg;
}
// Group 2
// Rule: If at least 2 of the RGB values are equal to or between 121 and
// 179, then apply specified opacity for Group 2
// Examples: XP Olive, OSX Graphite, Linux GTK, Wn High Con Black
// Gradient Bottom = TITLE_BACKGROUND @ 20% Opacity over LIST_BACKGROUND
// Gradient Top = TITLE BACKGROUND @ 0% Opacity over LIST_BACKGROUND
else if (testTwoPrimaryColors(titleBg, 120, 180)) {
bottom = blend(titleBg, bg, 20);
top = bg;
}
// Group 3
// Rule: If at least 2 of the RGB values are equal to or between 0 and
// 120, then apply specified opacity for Group 3
// Examples: XP Default, Wn Classic Standard, Wn Marine, Wn Plum, OSX
// Aqua, Wn High Con White, Wn High Con #1
// Gradient Bottom = TITLE_BACKGROUND @ 10% Opacity over LIST_BACKGROUND
// Gradient Top = TITLE BACKGROUND @ 0% Opacity over LIST_BACKGROUND
else {
bottom = blend(titleBg, bg, 10);
top = bg;
}
gradientBegin = getColor(resourceManager, top);
gradientEnd = getColor(resourceManager, bottom);
}
private RGB blend(RGB c1, RGB c2, int ratio) {
int r = blend(c1.red, c2.red, ratio);
int g = blend(c1.green, c2.green, ratio);
int b = blend(c1.blue, c2.blue, ratio);
return new RGB(r, g, b);
}
private int blend(int v1, int v2, int ratio) {
int b = (ratio * v1 + (100 - ratio) * v2) / 100;
return Math.min(255, b);
}
private boolean testTwoPrimaryColors(RGB rgb, int from, int to) {
int total = 0;
if (testPrimaryColor(rgb.red, from, to)) {
total++;
}
if (testPrimaryColor(rgb.green, from, to)) {
total++;
}
if (testPrimaryColor(rgb.blue, from, to)) {
total++;
}
return total >= 2;
}
private boolean testPrimaryColor(int value, int from, int to) {
return value > from && value < to;
}
private RGB getSystemColor(int code) {
return getDisplay().getSystemColor(code).getRGB();
}
private Color getImpliedBackground() {
return display.getSystemColor(SWT.COLOR_LIST_BACKGROUND);
}
private Display getDisplay() {
return display;
}
private Color getColor(ResourceManager manager, RGB rgb) {
try {
return manager.createColor(rgb);
} catch (DeviceResourceException e) {
return manager.getDevice().getSystemColor(SWT.COLOR_BLACK);
}
}
}
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