Several methods of adding background images to each control in QT

1. Add background image to Qpushbutton: Background image can be scaled freely according to button size.

void Setbuttonbackimage (Qpushbutton *button,qstring image,int sizew, int sizeh) {    //163,163 is the original resolution, slightly tuned here.    Qpixmap pixmap (image);    Qpixmap fitpixmap=pixmap.scaled (163,163). Scaled (Sizew, Sizeh, Qt::ignoreaspectratio, qt::smoothtransformation);    Button->seticon (Qicon (Fitpixmap));    Button->seticonsize (Qsize (Sizew,sizeh));    Button->setflat (TRUE);//Is this sentence can achieve button transparency, with PNG image is useful    button->setstylesheet ("border:0px");//clear border, cancel click Effect}

2. Add background image to Qwidget: The image can be freely scaled.

    This->setautofillbackground (true);    When the widget adds a background image, this sentence must be.    qpixmap pixmap (":/images/bg_news.png");    Qpixmap fitpixmap=pixmap.scaled (+) scaled (CONFIG->MAINWINDOWW,CONFIG->MAINWINDOWH, Qt::I Gnoreaspectratio, qt::smoothtransformation);    Qpalette Palette;    Palette.setbrush (Qpalette::background, Qbrush (Fitpixmap));    This->setpalette (palette);

3. Add background image to Qlabel: The image can be freely scaled.

    Qpixmap Pixmap (Normalicon);    Qpixmap fitpixmap=pixmap.scaled (Labelicon->width (), Labelicon->height (), Qt::ignoreaspectratio, Qt:: smoothtransformation);    Labelicon->setpixmap (FITPIXMAP);

4. Use QSS style, add background image, picture shows original proportions.

Lastbtn->setstylesheet ("Background-image:url (:/images/btn_previous_normal.png); border:0px");

Several methods of adding background images to each control in QT