Background image not showing in QWidget
I create a window with QWidget
and set a background image, when I run my code, I don't get the background image, but show the window with a standard background.
Can anyone help me what might be the reason.
// In header file
class STUDY : public QMainWindow, public Ui::STUDYClass
{
Q_OBJECT
public:
STUDY(QWidget *parent = 0, Qt::WFlags flags = 0);
~STUDY();
QPaintEvent *p2;
void backgroundImage();
void paintEvent(QPaintEvent *);
public slots:
};
//Constructor and paintEvent function in Cpp file
STUDY::STUDY(QWidget *parent, Qt::WFlags flags)
: QMainWindow(parent, flags)
{
setupUi(this);
backgroundImage();
update();
paintEvent(p2);
}
void STUDY::paintEvent(QPaintEvent *p2)
{
QPixmap pixmap;
pixmap.load(":/STUDY/Resources/Homepage.png");
QPainter paint(this);
paint.drawPixmap(0, 0, pixmap);
QWidget::paintEvent(p2);
}
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2 answers
There are many ways to set the background color of a window,
I will give you one simple method. ie override paintEvent
QWidget
. and draw a pixmap there.
Here is a sample widget code, I hope it helps
Header file
#ifndef QBACKGROUNDIMAGE_H
#define QBACKGROUNDIMAGE_H
#include <QtGui/QMainWindow>
#include "ui_QbackgroundImage.h"
#include <QtGui>
class backgroundImgWidget;
class QbackgroundImage : public QMainWindow
{
Q_OBJECT
public:
QbackgroundImage(QWidget *parent = 0);
~QbackgroundImage();
private:
Ui::QbackgroundImage ui;
};
class backgroundImgWidget : public QWidget
{
Q_OBJECT
public:
backgroundImgWidget(QWidget *parent = 0);
~backgroundImgWidget();
protected:
void paintEvent(QPaintEvent *p2);
};
#endif // QBACKGROUNDIMAGE_H
CPP file
#include "QbackgroundImage.h"
QbackgroundImage::QbackgroundImage(QWidget *parent)
: QMainWindow(parent)
{
// ui.setupUi(this);
backgroundImgWidget* widget = new backgroundImgWidget();
setCentralWidget(widget);
}
QbackgroundImage::~QbackgroundImage()
{
}
backgroundImgWidget::backgroundImgWidget(QWidget *parent):QWidget(parent)
{
}
backgroundImgWidget::~backgroundImgWidget()
{
}
void backgroundImgWidget::paintEvent(QPaintEvent *p2)
{
QPixmap pixmap;
pixmap.load(":/new/prefix1/Sunset.jpg");
QPainter paint(this);
paint.drawPixmap(0, 0, pixmap);
QWidget::paintEvent(p2);
}
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