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ocolorbutton.cpp

/*
               =.            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 <qcolor.h>
#include <qpixmap.h>
#include <qimage.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 );
}

This file is part of the documentation for OPIE Version 1.1.

Documentation copyright © 1997-2003 the KDE developers. 2003 OPIE developers
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