# kdeprint Library API Documentation

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# imagepreview.cpp

    00001 /*
    00002  *  This file is part of the KDE libraries
    00003  *  Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
    00004  *
    00005  *  This library is free software; you can redistribute it and/or
    00006  *  modify it under the terms of the GNU Library General Public
    00007  *  License version 2 as published by the Free Software Foundation.
    00008  *
    00009  *  This library is distributed in the hope that it will be useful,
    00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012  *  Library General Public License for more details.
    00013  *
    00014  *  You should have received a copy of the GNU Library General Public License
    00015  *  along with this library; see the file COPYING.LIB.  If not, write to
    00016  *  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017  *  Boston, MA 02111-1307, USA.
    00018  **/
    00019
    00020 #include "imagepreview.h"
    00021
    00022 #include <qpainter.h>
    00023 #include <qpixmap.h>
    00024 #include <qpaintdevice.h>
    00025
    00026 // forward definition
    00027 QImage convertImage(const QImage& image, int hue, int saturation, int brightness, int gamma);
    00028
    00029 ImagePreview::ImagePreview(QWidget *parent, const char *name ) : QWidget(parent,name) {
    00030     brightness_ = 100;
    00031     hue_ = 0;
    00032     saturation_ = 100;
    00033     gamma_ = 1000;
    00034     bw_ = false;
    00035
    00036     setBackgroundMode(NoBackground);
    00037 }
    00038
    00039 ImagePreview::~ImagePreview(){
    00040 }
    00041
    00042 void ImagePreview::setImage(const QImage& image){
    00043     image_ = image.convertDepth(32);
    00044     image_.detach();
    00045     resize(image_.size());
    00046     update();
    00047 }
    00048
    00049 void ImagePreview::setParameters(int brightness, int hue, int saturation, int gamma){
    00050     brightness_ = brightness;
    00051     hue_ = hue;
    00052     saturation_ = saturation;
    00053     gamma_ = gamma;
    00054     repaint();
    00055 }
    00056
    00057 void ImagePreview::paintEvent(QPaintEvent*){
    00058     QImage  tmpImage = convertImage(image_,hue_,(bw_ ? 0 : saturation_),brightness_,gamma_);
    00059     int x = (width()-tmpImage.width())/2, y = (height()-tmpImage.height())/2;
    00060
    00061     QPixmap buffer(width(), height());
    00062     buffer.fill(parentWidget(), 0, 0);
    00063     QPainter    p(&buffer);
    00064     p.drawImage(x,y,tmpImage);
    00065     p.end();
    00066
    00067     bitBlt(this, QPoint(0, 0), &buffer, buffer.rect(), Qt::CopyROP);
    00068 }
    00069
    00070 void ImagePreview::setBlackAndWhite(bool on){
    00071     bw_ = on;
    00072     update();
    00073 }
    00074
    00075 QSize ImagePreview::minimumSizeHint() const
    00076 {
    00077     return image_.size();
    00078 }

This file is part of the documentation for kdeprint Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Sat Jun 11 20:31:01 2005 by doxygen 1.4.1 written by Dimitri van Heesch, © 1997-2003