/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** 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.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.ui.internal.notifier;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Display;
import org.rssowl.ui.internal.OwlUI;
/**
* Helper Class to create the colors for the Notifier.
* <p>
* Note: Copied from FormColors of UI Forms.
* </p>
*
* @author bpasero
*/
public class NotifierColors {
private Display fDisplay;
private Color fGradientBegin;
private Color fGradientEnd;
private Color fBorder;
private ResourceManager fResources;
NotifierColors(Display display, ResourceManager resources) {
fDisplay = display;
fResources = resources;
createColors();
}
private void createColors() {
/* Notifier Border */
createBorderColor();
/* Notifier Gradient */
createGradientColors();
}
Color getGradientBegin() {
return fGradientBegin;
}
Color getGradientEnd() {
return fGradientEnd;
}
Color getBorder() {
return fBorder;
}
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);
// 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
// Keyline = TITLE_BACKGROUND @ 50% Opacity over LIST_BACKGROUND
else if (testTwoPrimaryColors(tbBorder, 120, 180))
tbBorder = blend(tbBorder, bg, 50);
// Group 3
// Rule: Everything else
// Examples: XP Default, Wn Classic Standard, Wn Marine, Wn Plum, OSX
// Aqua, Wn High Con White, Wn High Con #1
// Keyline = TITLE_BACKGROUND @ 30% Opacity over LIST_BACKGROUND
else {
tbBorder = blend(tbBorder, bg, 30);
}
fBorder = OwlUI.getColor(fResources, 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;
}
fGradientBegin = OwlUI.getColor(fResources, top);
fGradientEnd = OwlUI.getColor(fResources, 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 fDisplay.getSystemColor(SWT.COLOR_LIST_BACKGROUND);
}
private Display getDisplay() {
return fDisplay;
}
}