ocolorbutton.cpp

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/*
               =.            This file is part of the OPIE Project
             .=l.            Copyright (c)  2002 Robert Griebl <sandman@handhelds.org>
           .>+-=
 _;:,     .>    :=|.         This library is free software; you can
.> <`_,   >  .   <=          redistribute it and/or  modify it under
:`=1 )Y*s>-.--   :           the terms of the GNU Library General Public
.="- .-=="i,     .._         License as published by the Free Software
 - .   .-<_>     .<>         Foundation; either version 2 of the License,
     ._= =}       :          or (at your option) any later version.
    .%`+i>       _;_.
    .i_,=:_.      -<s.       This library is distributed in the hope that
     +  .  -:.       =       it will be useful,  but WITHOUT ANY WARRANTY;
    : ..    .:,     . . .    without even the implied warranty of
    =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
  _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU
..}^=.=       =       ;      Library General Public License for more
++=   -.     .`     .:       details.
 :     =  ...= . :.=-
 -.   .:....=;==+<;          You should have received a copy of the GNU
  -_. . .   )=.  =           Library General Public License along with
    --        :-=`           this library; see the file COPYING.LIB.
                             If not, write to the Free Software Foundation,
                             Inc., 59 Temple Place - Suite 330,
                             Boston, MA 02111-1307, USA.

*/

#include <opie/colorpopupmenu.h>
#include <opie/ocolorbutton.h>

#include <qpe/resource.h>

struct OColorButtonPrivate {
    QPopupMenu *m_menu;
    QColor m_color;
};


OColorButton::OColorButton ( QWidget *parent, const QColor &color, const char *name )
        : QPushButton ( parent, name )
{
        d = new OColorButtonPrivate;

        d-> m_menu = new OColorPopupMenu ( color, 0, 0 );
        setPopup ( d-> m_menu );
//      setPopupDelay ( 0 );
        connect ( d-> m_menu, SIGNAL( colorSelected(const QColor&)), this, SLOT( updateColor(const QColor&)));

        updateColor ( color );

        QSize s = sizeHint ( ) + QSize ( 12, 0 );
        setMinimumSize ( s );
        setMaximumSize ( s. width ( ) * 2, s. height ( ));
}

OColorButton::~OColorButton ( )
{
        delete d;
}

QColor OColorButton::color ( ) const
{
        return d-> m_color;
}

void OColorButton::setColor ( const QColor &c )
{
        updateColor ( c );
}

void OColorButton::updateColor ( const QColor &c )
{
        d-> m_color = c;

        QImage img ( 16, 16, 32 );
        img. fill ( 0 );

        int r, g, b;
        c. rgb ( &r, &g, &b );

        int w = img. width ( );
        int h = img. height ( );

        int dx = w * 20 / 100; // 15%
        int dy = h * 20 / 100;

        for ( int y = 0; y < h; y++ ) {
                for ( int x = 0; x < w; x++ ) {
                        double alpha = 1.0;

                        if ( x < dx )
                                alpha *= ( double ( x + 1 ) / dx );
                        else if ( x >= w - dx )
                                alpha *= ( double ( w - x ) / dx );
                        if ( y < dy )
                                alpha *= ( double ( y + 1 ) / dy );
                        else if ( y >= h - dy )
                                alpha *= ( double ( h - y ) / dy );

                        int a = int ( alpha * 255.0 );
                        if ( a < 0 )
                                a = 0;
                        if ( a > 255 )
                                a = 255;

                        img. setPixel ( x, y, qRgba ( r, g, b, a ));
                }
        }
        img. setAlphaBuffer ( true );

        QPixmap pix;
        pix. convertFromImage ( img );
        setPixmap ( pix );

        emit colorSelected ( c );
}

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