imagepreview.cpp
00001 /* 00002 * This file is part of the KDE libraries 00003 * Copyright (c) 2001 Michael Goffioul <tdeprint@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., 51 Franklin Street, Fifth Floor, 00017 * Boston, MA 02110-1301, USA. 00018 **/ 00019 00020 #include "imagepreview.h" 00021 00022 #include <tqpainter.h> 00023 #include <tqpixmap.h> 00024 #include <tqpaintdevice.h> 00025 00026 // forward definition 00027 TQImage convertImage(const TQImage& image, int hue, int saturation, int brightness, int gamma); 00028 00029 ImagePreview::ImagePreview(TQWidget *parent, const char *name ) : TQWidget(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 TQImage& 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(TQPaintEvent*){ 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 TQPixmap buffer(width(), height()); 00062 buffer.fill(parentWidget(), 0, 0); 00063 TQPainter p(&buffer); 00064 p.drawImage(x,y,tmpImage); 00065 p.end(); 00066 00067 bitBlt(this, TQPoint(0, 0), &buffer, buffer.rect(), TQt::CopyROP); 00068 } 00069 00070 void ImagePreview::setBlackAndWhite(bool on){ 00071 bw_ = on; 00072 update(); 00073 } 00074 00075 TQSize ImagePreview::minimumSizeHint() const 00076 { 00077 return image_.size(); 00078 }