5.15.2使用pdf
必须要安装QT源码,可以看到编译器lib目录已经有pdf相关的lib文件,d是debug
1.找到源码目录:D:\soft\QT\5.15.2\Src\qtwebengine\include
复制这两个文件夹到编译器的包含目录中:D:\soft\QT\5.15.2\msvc2019_64\include
2.找到D:\soft\QT\5.15.2\Src\qtwebengine\src\pdf\api目录,将目录下的文件夹全部复制替换到D:\soft\QT\5.15.2\msvc2019_64\include\QtPdf中。
3.将D:\soft\QT\5.15.2\Src\qtwebengine\src\pdfwidgets以下文件复制替换到到D:\soft\QT\5.15.2\msvc2019_64\include\QtPdfWidgets中
4.修改pro文件,不用加入附加包含目录,只需要加入附加库目录和lib名称即可
LIBS += -LD:/soft/Qt/5.15.2/msvc2019_64/lib
CONFIG(debug, debug|release){
LIBS += -lQt5Pdfd
LIBS += -lQt5PdfWidgetsd
}
else
{
LIBS += -lQt5Pdf
LIBS += -lQt5PdfWidgets
}
5.测试
#include <QApplication>
#include <QtPdf/QPdfDocument>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QPdfDocument *doc = new QPdfDocument;
doc->load("D:/1.pdf");
QSizeF pageSize = doc->pageSize(0);
QImage image = doc->render(0,pageSize.toSize());
image.save("D:/1.png");
return a.exec();
}
加载pdf为QGraphicsScene的背景
#include <QApplication>
#include <QtPdf/QPdfDocument>
#include <QGraphicsScene>
#include <QGraphicsView>
class MyQGraphicsScene:public QGraphicsScene
{
public:
MyQGraphicsScene(QObject *parent = nullptr):QGraphicsScene(parent)
{
doc = new QPdfDocument(this);
}
void drawBackground(QPainter *painter, const QRectF &rect) override
{
doc->load("D:/1.pdf");
QSizeF pageSize = doc->pageSize(0);
QImage image = doc->render(0,pageSize.toSize());
painter->setPen(Qt::blue);
painter->setBrush(image);
painter->drawRect(sceneRect());
}
private:
QPdfDocument *doc = nullptr;
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
// 创建自定义场景
MyQGraphicsScene *scene = new MyQGraphicsScene();
scene->setSceneRect(0,0,500,400);
// 创建视图,并设置场景
QGraphicsView *view = new QGraphicsView(scene);
view->setFixedSize(800,600);
view->show();
return a.exec();
}
重写QGraphicsScene的drawBackground方法即可达到目的