=begin
**
** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**

** Translated to QtRuby by Richard Dale
=end
    
class PixelDelegate < Qt::AbstractItemDelegate

    ItemSize = 256
    slots 'pixelSize=(int)'
    attr_accessor :pixelSize

    def initialize(parent = nil)
        super(parent)
        @pixelSize = 12
    end

    def paint(painter, option, index)
        painter.renderHint = Qt::Painter::Antialiasing
        painter.pen = Qt::NoPen

        if (option.state & Qt::Style::State_Selected.to_i) != 0
            painter.brush = option.palette.highlight
        else
            painter.brush = Qt::Brush.new(Qt::white)
        end

        painter.drawRect(option.rect)

        if (option.state & Qt::Style::State_Selected.to_i) != 0
            painter.brush = option.palette.highlightedText
        else
            painter.brush = Qt::Brush.new(Qt::black)
        end
    
        size = [option.rect.width, option.rect.height].min
        brightness = index.model.data(index, Qt::DisplayRole).to_i
        radius = (size/2.0) - (brightness/255.0 * size/2.0)

        painter.drawEllipse(Qt::RectF.new(option.rect.x + option.rect.width/2 - radius,
                                option.rect.y + option.rect.height/2 - radius,
                                2*radius, 2*radius))
    end
    
    def sizeHint(option, index)
        return Qt::Size.new(@pixelSize, @pixelSize)
    end
end