How to resize an image in a QTextEdit?

Question

How to click on the image, hold from a corner of it, and resize the image in the QTextEdit? Or at least how to get an image under cursor/that is selected in order to change width and hight?

Answer 1

You better use Qgraphicsitem instead of QTextEdit.. hope this link would be helpful for you

Answer 2

Here how I have implemented:

void AdvancedTextEdit::resizeImage()
{

    QTextBlock currentBlock = m_textEdit->textCursor().block();
    QTextBlock::iterator it;

    for (it = currentBlock.begin(); !(it.atEnd()); ++it)
    {

             QTextFragment fragment = it.fragment();



             if (fragment.isValid())
             {

                 if(fragment.charFormat().isImageFormat ())
                 {
                      QTextImageFormat newImageFormat = fragment.charFormat().toImageFormat();

                      QPair<double, double> size = ResizeImageDialog::getNewSize(this, newImageFormat.width(), newImageFormat.height());

                      newImageFormat.setWidth(size.first);
                      newImageFormat.setHeight(size.second);

                      if (newImageFormat.isValid())
                      {
                          //QMessageBox::about(this, "Fragment", fragment.text());
                          //newImageFormat.setName(":/icons/text_bold.png");
                          QTextCursor helper = m_textEdit->textCursor();

                          helper.setPosition(fragment.position());
                          helper.setPosition(fragment.position() + fragment.length(),
                                              QTextCursor::KeepAnchor);
                          helper.setCharFormat(newImageFormat);
                      }
                  }
              }
       }
}

Of course I have implemented also the ResizeImageDialog dialog's getNewSize(this, newImageFormat.width(), newImageFormat.height()); function that gets the current size of image and lets user to chnage the size, and returns the new size of image as a QPair. This is not hard to do. See here for the implementation of the dialog.