Best way to insert background image in Form

MarceloGomez

Dear

I want to know what is the best way (most optimal) to insert a background image on a form.

Use stylesheet in Form (border-image property)? Then I need to change the border-image property of all widgets containing the form.
Inserted on a label with the image (background-image)
other?

Tanks All!!!!

raspe88

What about setting a custom QPalette to that widget? You could set a custom QBrush created with one of the constructors that takes a QPixmap or QImage using QPalette::setBrush.

mrjj

Just a note:

Use stylesheet in Form (border-image property)?
Then I need to change the border-image property of all widgets containing the form.

Style sheets are cascading so if you apply to parent, all childs can be affected.

MarceloGomez

@mrjj said in Best way to insert background image in Form:

are cascading

Tanks for your reply. I know that Style sheets are cascading so if you apply to parent, all childs can be affected. This is the optimal way? 1,2 or 3? Tanks

MarceloGomez

@raspe88 Hi, Tanks for your reply. Could you give me an example?

raspe88

@MarceloGomez Here's some short example for the QBrush-constructor using QImage:

#include <QApplication>
#include <QBrush>
#include <QHBoxLayout>
#include <QPalette>
#include <QPushButton>
#include <QWidget>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QWidget widget;
    QPalette palette = widget.palette();
    const QBrush brush(QImage(":/ImageFromResources"));
    palette.setBrush(QPalette::Background, brush);
    widget.setPalette(palette);

    QHBoxLayout *layout = new QHBoxLayout(&widget);
    widget.setLayout(layout);
    layout->addWidget(new QPushButton(&widget), 0);
    layout->addWidget(new QWidget(&widget), 1);

    widget.setVisible(true);

    return app.exec();
}

As you can see, even if the QPalette is set before adding/parenting new widgets, it's only applied to the widget where you set it. That's because the global default QPalette is used when creating a new instance of a QWidget. Changing the global QPalette would be done using QApplication::setPalette .