BudgetPro/widget/mtextedit.cpp

#include "mtextedit.h"
#include <QTextDocument>
#include <QTextCursor>
#include <QImage>
#include <QByteArray>
#include <QBuffer>
#include <stdlib.h>

MTextEdit::MTextEdit(QWidget* parent)
    : QTextEdit(parent)
{
}

bool MTextEdit::canInsertFromMimeData(const QMimeData* source) const
{
    return source->hasImage() || QTextEdit::canInsertFromMimeData(source);
}

void MTextEdit::insertFromMimeData(const QMimeData* source)
{
    if (source->hasImage())
    {
        QStringList formats = source->formats();
        QString format;
        for (int i = 0; i < formats.size(); i++)
        {
            if (formats[i] == "image/bmp")
            {
                format = "BMP";
                break;
            }
            if (formats[i] == "image/jpeg")
            {
                format = "JPG";
                break;
            }
            if (formats[i] == "image/jpg") {
                format = "JPG";
                break;
            }
            if (formats[i] == "image/gif") {
                format = "GIF";
                break;
            }
            if (formats[i] == "image/png") {
                format = "PNG";
                break;
            }
            if (formats[i] == "image/pbm") {
                format = "PBM";
                break;
            }
            if (formats[i] == "image/pgm") {
                format = "PGM";
                break;
            }
            if (formats[i] == "image/ppm") {
                format = "PPM";
                break;
            }
            if (formats[i] == "image/tiff") {
                format = "TIFF";
                break;
            }
            if (formats[i] == "image/xbm") {
                format = "XBM";
                break;
            }
            if (formats[i] == "image/xpm") {
                format = "XPM";
                break;
            }
        }
        if (!format.isEmpty())
        {
            //          dropImage(qvariant_cast<QImage>(source->imageData()), format);
            dropImage(qvariant_cast<QImage>(source->imageData()), "JPG"); // Sorry, ale cokoli jiného dlouho trvá
            return;
        }
    }
    QTextEdit::insertFromMimeData(source);
}

QMimeData* MTextEdit::createMimeDataFromSelection() const
{
    return QTextEdit::createMimeDataFromSelection();
}

void MTextEdit::dropImage(const QImage& image, const QString& format)
{
    QByteArray bytes;
    QBuffer buffer(&bytes);
    buffer.open(QIODevice::WriteOnly);
    image.save(&buffer, format.toLocal8Bit().data());
    buffer.close();
    QByteArray base64 = bytes.toBase64();
    QByteArray base64l;
    for (int i = 0; i < base64.size(); i++)
    {
        base64l.append(base64[i]);
        if (i % 80 == 0)
        {
            base64l.append("\n");
        }
    }

    QTextCursor cursor = textCursor();
    QTextImageFormat imageFormat;
    imageFormat.setWidth(image.width());
    imageFormat.setHeight(image.height());
    imageFormat.setName(QString("data:image/%1;base64,%2")
                            .arg(QString("%1.%2").arg(rand()).arg(format))
                            .arg(base64l.data()));
    cursor.insertImage(imageFormat);
}