Qt C++ - Aligning QProgressBar inside a QSplashScreen - c++

Question

I am putting a QProgressBar inside a QSplashScreen by subclassing QSplashScreen. It overrides the drawContents() method.
I thought I had set the geometry correctly, but it renders at both the top and bottom of the screen. I don't know why. Perhaps there's another way to align it. The numbers are correct, as the image is 380x284, so a 19 height progress bar should be 265 pixels down.
Sorry for crappy picture, splash screen wasn't showing up with print screen button. It's just a 1 color white splash screen at the moment, but as you can see, progress bar at top and bottom (they're both the same colors, its the lighting from the camera).
http://i.imgur.com/p1LoJ.jpg
Another issue will be the showMessage() method of QSplashScreen. I want the message to appear above the progress bar, right-aligned... if anyone has any ideas how to do that.
splashscreen.cpp
#include "splashscreen.h"
SplashScreen::SplashScreen(QApplication *app, QWidget *parent) :
QSplashScreen(parent)
{
this->app = app;
this->setPixmap(QPixmap(":/images/splashscreen.png"));
this->setCursor(Qt::BusyCursor);
// if I dont make it a child, it *only* renders at the top
progress = new QProgressBar(this);
progress->setGeometry(0, 265, 380, 19); // puts it at bottom
progress->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
progress->setValue(0);
progress->setMaximum(100);
progress->setEnabled(true);
this->showMessage("Hello", Qt::AlignBottom);
connect(progress, SIGNAL(valueChanged(int)), this, SLOT(progressBarUpdated(int)));
}
void SplashScreen::drawContents(QPainter *painter)
{
QSplashScreen::drawContents(painter);
this->progress->render(painter);
}
void SplashScreen::progressBarUpdated(int value)
{
this->repaint();
this->app->processEvents();
}
splashscreen.h
#ifndef SPLASHSCREEN_H
#define SPLASHSCREEN_H
#include <QSplashScreen>
#include <QProgressBar>
#include <QApplication>
class SplashScreen : public QSplashScreen
{
Q_OBJECT
public:
explicit SplashScreen(QApplication *app, QWidget *parent = 0);
QProgressBar *progress;
QWidget *spacer;
QApplication *app;
public slots:
void progressBarUpdated(int value);
protected:
void drawContents(QPainter *painter);
};
#endif // SPLASHSCREEN_H
main.cpp
#include <QtGui/QApplication>
#include <time.h>
#include "splashscreen.h"
#include "mainwindow.h"
int main(int argc, char *argv[])
{
srand(time(0));
QApplication a(argc, argv);
SplashScreen *splash = new SplashScreen(&a);
splash->show();
// snip.. loading a ton of stuff into memory at startup
// if you're testing this you might have to sleep/timer here iono
MainWindow w;
splash->finish(&w);
w.show();
return app.exec();
}

Answer 1

You can paint progress directly, without creating QProgressBar. For example:
sp.h:
#ifndef SPLASHSCREEN_H
#define SPLASHSCREEN_H
#include <QSplashScreen>
#include <QApplication>
class SplashScreen : public QSplashScreen
{
Q_OBJECT
public:
explicit SplashScreen(QApplication *app, QWidget *parent = 0);
int m_progress;
QApplication *app;
public slots:
void setProgress(int value)
{
m_progress = value;
if (m_progress > 100)
m_progress = 100;
if (m_progress < 0)
m_progress = 0;
update();
}
protected:
void drawContents(QPainter *painter);
};
#endif // SPLASHSCREEN_H
sp.cpp
#include "sp.h"
SplashScreen::SplashScreen(QApplication *aApp, QWidget *parent) :
QSplashScreen(parent), app(aApp), m_progress(0)
{
this->setPixmap(QPixmap(":/images/splashscreen.png"));
this->setCursor(Qt::BusyCursor);
this->showMessage("Hello", Qt::AlignBottom);
}
void SplashScreen::drawContents(QPainter *painter)
{
QSplashScreen::drawContents(painter);
// Set style for progressbar...
QStyleOptionProgressBarV2 pbstyle;
pbstyle.initFrom(this);
pbstyle.state = QStyle::State_Enabled;
pbstyle.textVisible = false;
pbstyle.minimum = 0;
pbstyle.maximum = 100;
pbstyle.progress = m_progress;
pbstyle.invertedAppearance = false;
pbstyle.rect = QRect(0, 265, 380, 19); // Where is it.
// Draw it...
style()->drawControl(QStyle::CE_ProgressBar, &pbstyle, painter, this);
}
May be this helps you.