imagepreview.cpp
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00020 #include "imagepreview.h"
00021 
00022 #include <qpainter.h>
00023 #include <qpixmap.h>
00024 #include <qpaintdevice.h>
00025 
00026 
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 3.2.0.