qt/LedOK/LoUIClass/pixbmpshowdialog.cpp

#include "pixbmpshowdialog.h"
#include "ui_pixbmpshowdialog.h"
#include <QPainter>
PixbmpShowDialog::PixbmpShowDialog(QWidget *parent) :
    BaseDlg(parent),
    ui(new Ui::PixbmpShowDialog)
{
    setAttribute(Qt::WA_DeleteOnClose);
    ui->setupUi(this);

}

PixbmpShowDialog::~PixbmpShowDialog()
{
    delete ui;
}
void PixbmpShowDialog::ResizeByPixmap(int w,int h)
{
    m_iWidth=w;
    m_iHeight=h;
    int iWidth=w;
    int iHeight=h;
    if(iWidth<rect().width()&&iHeight<rect().height())
       this->resize(iWidth,iHeight);
    else {
        if(iWidth>iHeight)
           this->resize(rect().height()*iWidth/iHeight,rect().height());
        else
            this->resize(rect().width(),rect().width()*iHeight/iWidth);
    }
}
void PixbmpShowDialog::paintEvent(QPaintEvent * event)
{
    Q_UNUSED(event);
    QPainter painter(this);
    //painter.eraseRect(rect());
   // painter.scale(m_PixMap.width(), m_PixMap.height());
    QRectF sourceRt(0,0,m_iWidth,m_iHeight);
    painter.drawPixmap(rect(), m_PixMap,sourceRt);

}