projects/infoscreen/MainView.cpp

#include "MainView.h"
#include <QPushButton>
#include <QVBoxLayout>

#include <QTimer>

MainView::MainView(QWidget* parent)
 : QWidget(parent)
{
        this->resize(400,400);
        this->setPalette( QPalette( Qt::blue ) );


        red = new QWidget(this);
        red->setStyleSheet("QWidget { background-color: red; }");

        green = new QWidget(this);
        green->setStyleSheet("QWidget { background-color: green; }");
        green->setVisible(false);

        current = red;

        QVBoxLayout* layout = new QVBoxLayout();
        layout->addWidget(red,1 );
        layout->addWidget(green,1);
        layout->addStretch();
        layout->setContentsMargins(0,0,0,0);
        setLayout(layout);


        QTimer* timer = new QTimer(this);
        connect(timer, SIGNAL(timeout() ), this, SLOT(onTimer() ));
        timer->start(5000);
}


void MainView::onTimer()
{
        if( current == red) {
                red->setVisible(false);
                green->setVisible(true);
                current = green;
        } else {
                red->setVisible(true);
                green->setVisible(false);
                current = red;
        }
}
1	#include "MainView.h"
2	#include <QPushButton>
3	#include <QVBoxLayout>
4
5	#include <QTimer>
6
7	MainView::MainView(QWidget* parent)
8	: QWidget(parent)
9	{
10	this->resize(400,400);
11	this->setPalette( QPalette( Qt::blue ) );
12
13
14	red = new QWidget(this);
15	red->setStyleSheet("QWidget { background-color: red; }");
16
17	green = new QWidget(this);
18	green->setStyleSheet("QWidget { background-color: green; }");
19	green->setVisible(false);
20
21	current = red;
22
23	QVBoxLayout* layout = new QVBoxLayout();
24	layout->addWidget(red,1 );
25	layout->addWidget(green,1);
26	layout->addStretch();
27	layout->setContentsMargins(0,0,0,0);
28	setLayout(layout);
29
30
31
32	QTimer* timer = new QTimer(this);
33	connect(timer, SIGNAL(timeout() ), this, SLOT(onTimer() ));
34	timer->start(5000);
35	}
36
37
38	void MainView::onTimer()
39	{
40	if( current == red) {
41	red->setVisible(false);
42	green->setVisible(true);
43	current = green;
44	} else {
45	red->setVisible(true);
46	green->setVisible(false);
47	current = red;
48	}
49	}