qt 保存为svg图片

添加

#include <QtSvg/QSvgGenerator>

#include <QFileDialog>

QT += core gui svg

一些重要的头文件以及声明。

创建menu bar, 命名一个Save as SVG,添加一个slog，源码如下；

#include "basicshapewindow.h"
#include "ui_basicshapewindow.h"
#include <QtSvg/QSvgGenerator>
#include <QFileDialog>

BasicShapeWindow::BasicShapeWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::BasicShapeWindow)
{
ui->setupUi(this);
}

void BasicShapeWindow::paintEvent(QPaintEvent *event)
{
paintAll();
}

void BasicShapeWindow::paintAll(QSvgGenerator *generator)
{
QPainter painter;
if (generator)
painter.begin(generator);
else
painter.begin(this);
painter.setFont(QFont("Times", 14, QFont::Bold));
painter.drawText(QPoint(20, 30), "Testing");

painter.drawLine(QPoint(50, 60), QPoint(100, 100));
painter.setBrush(Qt::BDiagPattern);
painter.drawRect(QRect(40, 120, 80, 30));

QPen ellipsePen;
ellipsePen.setColor(Qt::red);
ellipsePen.setStyle(Qt::DashDotLine);

painter.setPen(ellipsePen);
painter.drawEllipse(QPoint(80, 200), 50, 20);

QPainterPath rectPath;
rectPath.addRect(QRect(150, 20, 100, 50));

painter.setPen(QPen(Qt::red, 1, Qt::DashDotLine, Qt::FlatCap, Qt::MiterJoin));
painter.setBrush(Qt::yellow);
painter.drawPath(rectPath);

QPainterPath ellipsePath;
ellipsePath.addEllipse(QPoint(200, 120), 50, 20);
painter.setPen(QPen(QColor(79, 106, 25), 5, Qt::SolidLine, Qt::FlatCap, Qt::MiterJoin));
painter.setBrush(QColor(122, 163, 39));
painter.drawPath(ellipsePath);

QImage image;
image.load(":/head.png");
painter.drawImage(QPoint(150, 150), image);
painter.end();
}

BasicShapeWindow::~BasicShapeWindow()
{
delete ui;
}

void BasicShapeWindow::on_actionSave_as_triggered()
{
QString filePath = QFileDialog::getSaveFileName(this, "Save SVG", "", "SVG files (*.svg)");

if (filePath == "")
return ;
QSvgGenerator generator;
generator.setFileName(filePath);
generator.setSize(QSize(this->width(), this->height()));
generator.setViewBox(QRect(0, 0, this->width(), this->height()));
generator.setTitle("SVG Example");
generator.setDescription("This SVG file is generated by Qt.");
paintAll(&generator);
}