Qt：使用 poppler 库打开 qrc pdf

发布于 2024-11-10 16:26:08 字数 858 浏览 7 评论 0原文

我在使用 poppler 库显示 pdf 的功能时遇到了一些问题。下面的代码是出现问题的函数。

const QString &file 是文件的路径 int page是它必须打开的页面

当我将文件设置为真实路径（例如“/Users/User/Documents/xxx.pdf”）时，打开它是没有问题的。但是当我给出 qrc 文件的路径（“：/files/xxx.pdf”）时，它不起作用。我想用它来显示用户手册，例如在应用程序中。

我还尝试首先用它制作一个 QFile，打开它并执行 readAll，然后加载通过执行 Poppler::Document::loadFromData(the qbytearray) 收到的 QByteArray，但是当它以只读模式打开 QFile。

void class::setPdf(const QString &file, int page)
{
    Poppler::Document *doc = Poppler::Document::load(file);
    if (!doc) {
        QMessageBox msgbox(QMessageBox::Critical, tr("Open Error"), tr("Please check preferences: cannot open:\n") + file,
                         QMessageBox::Ok, this);
        msgbox.exec();
    }
    else{ /*Code for displaying the pdf, which works fine*/
    }
}

我希望你能帮助我，

问候，

马特

原文

I'm having a bit of trouble with my function for displaying pdf's with the poppler library. The code below is the function in which the problem occurs.

const QString &file is the path to the file
int page is the page on which it has to open

When i set file to a real path (e.g. "/Users/User/Documents/xxx.pdf"), it is no problem to open it. But when i give the path to a qrc file (":/files/xxx.pdf"), it won't work. I want to use it for displaying a user manual for instance, within the application.

I've also tried first making a QFile out of it, opening it and doing readAll, then loading the QByteArray received by doingPoppler::Document::loadFromData(the qbytearray), but it errors already when opening the QFile in ReadOnly mode.

void class::setPdf(const QString &file, int page)
{
    Poppler::Document *doc = Poppler::Document::load(file);
    if (!doc) {
        QMessageBox msgbox(QMessageBox::Critical, tr("Open Error"), tr("Please check preferences: cannot open:\n") + file,
                         QMessageBox::Ok, this);
        msgbox.exec();
    }
    else{ /*Code for displaying the pdf, which works fine*/
    }
}

I hope you can help me,

greetings,

Matt

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我很坚强 2024-11-17 16:26:08

我也尝试过先制作一个 QFile
出来，打开它并做
readAll，然后加载 QByteArray
收到者
doPoppler::Document::loadFromData(the
qbytearray），但它已经出错了
以只读方式打开 QFile 时
模式。

QFile f;
f.setFileName(":/skin/AppIcon16.png");
f.open(QIODevice::ReadOnly);
QByteArray r=f.readAll();

完美读取资源中的所有数据，已检查。所以我建议你在尝试时做错了什么。也许是路径错误，也许是其他原因......

I've also tried first making a QFile
out of it, opening it and doing
readAll, then loading the QByteArray
received by
doingPoppler::Document::loadFromData(the
qbytearray), but it errors already
when opening the QFile in ReadOnly
mode.

QFile f;
f.setFileName(":/skin/AppIcon16.png");
f.open(QIODevice::ReadOnly);
QByteArray r=f.readAll();

Perfectly reads all data from the resource, have checked it. So i suggest you did something wrong when tried that. Maybe path errors, maybe something else...

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