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qtresourcesqpixmap

set an image to a qt pushbutton

I tried to set an image to a Qt pushbutton using this widely known code.

QPixmap *pic = new QPixmap(":/images/logo.png");
QIcon *icon = new QIcon(*pic);
ui->pushButton->setIcon(*icon);
ui->pushButton->setIconSize(QSize(pic->width(), pic->height()));

Here's my qrc file

<RCC>
    <qresource prefix="/images">
        <file>images/logo.png</file>
    </qresource>
</RCC>

Even though the program compiles, always a runtime exception occurs at 

QPixmap *pic = new QPixmap(":/images/logo.png");

When I tried printing *pic on output console, it showed that pic = QPixmap(QSize(0, 0) ). i.e. it is null. Any ideas as to where I went wrong?

Thanks in advance!

Solution

  • Please don't use pointers there.

    You don't even have to create a QPixmap object and then use that to create a QIcon object. QIcon has a constructor that takes a file name as a parameter. But that's up to you. Also check your resource location. It looks like it should be :/images/images/logo.png

    QPixmap pix(":/images/images/logo.png");
QIcon icon(pix);
ui->pushButton->setIcon(icon);
ui->pushButton->setIconSize(pix.size())