QPixmap MainWindow::text2Pixmap(QString text)

{

QFontMetrics fmt(m_font);

QPixmap result(fmt.width(text), fmt.height());

QRect rect(0,0,fmt.width(text), fmt.height());

result.fill(Qt::transparent);

QPainter painter(&result);

painter.setFont(m_font);

painter.setPen(QColor(255,143,36));

//painter.drawText(const QRectF(fmt.width(text), fmt.height()),Qt::AlignLeft, text);

painter.drawText((const QRectF)(rect),text);

return result;

}

//多張圖片拼接合成一張圖片

QPixmap MainWindow::pinjie(QVector<QPixmap> image)

{

int image_width=0;

int max_height = 0;

QVector <QPixmap > ::iterator it;

for(it = image.begin();it!=image.end();++it)

{

int width = (*it).width();

image_width += width;

image_width +=5;

if((*it).height()>max_height)

{

max_height =(*it).height();

}

}

QPixmap result_image_h(image_width,max_height);

result_image_h.fill(Qt::transparent);

QPainter painter_h;

painter_h.begin(&result_image_h);

int x_number=0;

for(it = image.begin();it!=image.end();++it)

{

painter_h.drawPixmap(x_number,0,(*it));

x_number += (*it).width();

x_number +=5;

}

painter_h.end();

return result_image_h;

}

QPixmap MainWindow::zoomOutPix(QPixmap pix ,int addWidth, int addHeight)

{

// addWidth pix增加的寬度，addHeight pix增加的高度

QPixmap res(pix.width() + addWidth, pix.height() + addHeight);

res.fill(Qt::transparent);

QPainter painter(&res);

painter.drawPixmap(addWidth/2, addHeight/2, pix.width(), pix.height(), pix);

return res;

}

//一張圖片繪制在另外一張圖片上

QPixmap MainWindow::dijia(QPixmap p1, QPixmap p2)

{

//p1作為底片， p2繪制在p1圖片上

QPainter painter(&p1);

painter.drawPixmap(0,0,p2.width(),p2.height(), p2);

return p1;

}

//縮放

QString str = QString::fromLocal8Bit("(侏羅紀(jì))");

QPixmap p = text2Pixmap(str);

p = p.scaled(100, 30, Qt::KeepAspectRatio, Qt::SmoothTransformation);