#include?“imagewidget.h“
#include?
ImageWidget::ImageWidget（QWidget*?parent）:QWidget（parent）
{
????QDesktopWidget?desktop;
????pixmap=QImage（desktop.width（）desktop.height（）QImage::Format_Indexed8）;
????scale=1;
????angle=0;
????bFit=true;
????biasx=0;
????biasy=0;
}
void?ImageWidget::paintEvent（QPaintEvent?*event）
{
????QPainter?painter（this）;
????if（angle）
????{
????????QPointF?center（this->width（）/2.0this->height（）/2.0）;
????????painter.translate（center）;
????????painter.rotate（angle）;
????????painter.translate（-center）;
????}
????if（bFit）
????{
????????QImage?fitmap=pixmap.scaled（width（）height（）Qt::KeepAspectRatio）;
????????painter.drawImage（biasxbiasyfitmap）;

????}
????else
????{
????????painter.drawImage（biasxbiasypixmap）;
????}
}
void?ImageWidget::setPixmap（QString?fileName）
{
????pixmap.load（fileName）;
????update（）;
}
QImage?ImageWidget::getPixmap（）
{
????return?pixmap;
}
void?ImageWidget::setAngle（qreal?rotateAngle）
{
????angle?+=rotateAngle;
????update（）;
}
/*void?ImageWidget::changeImageToGray（）//方法一
{
????QSize?size=pixmap.size（）;
????int?w=size.rwidth（）;
????int?h=size.rheight（）;
????uchar*?firstPP=pixmap.bits（）;
????QImage?grayImg=QImage（sizeQImage::Format_Indexed8）;
????uchar*?firstDP=grayImg.bits（）;
??????for（int?i=0;i????????for（int?j=0;j????????{
????????????*firstDP=*（firstPP+1）;
????????????firstPP+=4;
????????????firstDP++;
????????}

????QVector?grayColorTable;
????QRgb?rgb;
????for（int?i?=?0;?i?????{
?????rgb=qRgb（iii）;
?????grayColorTable.append（rgb）;
????}
????grayImg.setColorTable（grayColorTable）;
????grayImg.save（“grayImg.bmp““bmp“）;
}*/
void?ImageWidget::changeImageToGray（）//方法二最好的方法，我設(shè)計(jì)的
{
????int?depth=pixmap.depth（）;
????int?h=pixmap.height（）;
????int?w=pixmap.width（）;
????QImage?grayImg=QImage（whQImage::Format_Indexed8）;
????uint?firstDP;
????grayImg.setColorCount（256）;
????QRgb?rgb;
????for（int?i?=?0;?i?????{
?????rgb=qRgb（iii）;

?????grayImg.setColor（irgb）;
????}
????QRgb?px;
?????if（depth==32）
????{
????????for（int?i=0;i????????????for（int?j=0;j????????????{
????????????????px=pixmap.pixel（ij）;
???????????????firstDP=（uint）（qRed（px）*30?+qGreen（px）*59?+?qBlue（px）*11?+?50）?/?100;
????????????????grayImg.setPixel（ijfirstDP）;
????????????}
????????grayImg.save（“grayImg.bmp““bmp“）;
????????pixmap=grayImg;
????????this->update（）;
????}
?????else?if（（depth==8）||（depth==4）||（depth==1））
????{
????????QVector?grayColorTable;
????????QRgb?rgb;
????????for（int?i?=?0;?i?????????{
?????????rgb=qRgb（iii）;
?????????grayColorTable.append（rgb）;
????????}
????????pixmap.setColorTable（grayColorTable）;
????}

????else
????????return;
}

/*void?ImageWidget::changeImageToGray（）//方法三
{
????int?i=pixmap.width（）;
????int?j=pixmap.height（）;
????QVector?grayColorTable;
????QRgb?rgb;
????for（int?i?=?0;

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件??????87102??2010-06-16?21:32??tesImage33\debug\edgeImage.bmp

?????文件?????787510??2010-10-08?16:01??tesImage33\debug\grayImg.bmp

?????文件?????443918??2010-10-08?16:01??tesImage33\debug\imagewidget.o

?????文件?????246722??2010-09-29?14:45??tesImage33\debug\main.o

?????文件?????318546??2010-11-10?21:50??tesImage33\debug\mainwindow.o

?????文件???????2932??2010-09-29?14:45??tesImage33\debug\moc_imagewidget.cpp

?????文件?????258295??2010-09-29?14:45??tesImage33\debug\moc_imagewidget.o

?????文件???????3077??2010-09-29?14:45??tesImage33\debug\moc_mainwindow.cpp

?????文件?????267153??2010-09-29?14:45??tesImage33\debug\moc_mainwindow.o

?????文件????1726818??2010-11-10?21:50??tesImage33\debug\tesImage33.exe

?????文件??????29677??2010-12-19?16:29??tesImage33\imagewidget.cpp

?????文件????????786??2010-09-29?14:45??tesImage33\imagewidget.h

?????文件????????279??2010-05-28?18:26??tesImage33\main.cpp

?????文件???????6295??2010-12-19?16:33??tesImage33\mainwindow.cpp

?????文件???????1348??2010-09-29?14:45??tesImage33\mainwindow.h

?????文件???????6138??2010-09-14?14:34??tesImage33\Makefile

?????文件???????6322??2010-09-14?14:34??tesImage33\Makefile.Debug

?????文件???????6425??2010-09-14?14:34??tesImage33\Makefile.Release

?????文件????????307??2010-05-28?16:47??tesImage33\tesImage33.pro

?????文件???????5201??2010-12-19?16:36??tesImage33\tesImage33.pro.user

?????文件??????12165??2010-11-10?22:38??tesImage33\tesImage33.pro.user.1.3

?????目錄??????????0??2010-11-10?21:50??tesImage33\debug

?????目錄??????????0??2010-05-28?18:27??tesImage33\release

?????目錄??????????0??2010-12-14?19:36??tesImage33

-----------?---------??----------?-----??----

??????????????4217016????????????????????24