Qwidget Animation with Qtimer

[tissa]

I want to make an animation with two circlewidget in a scene. My purpose is to make the first widget with concentric circle animated for a periode of time and then stop it, after make the second widget animated also for a periode of time .

but I get blocked how to make such thing here is my code:

Main.cpp:

#include <QApplication>
 
#include <QTimer>
#include<unistd.h>
#include<QGraphicsScene>
#include<QGraphicsProxyWidget>
#include<QGraphicsView>
#include "circlewidget.h"
#include<QTimeLine>
 
 
int main(int argc, char *argv[])
{
 
QApplication app(argc, argv);
CircleWidget * circle= new CircleWidget();
CircleWidget * circl= new CircleWidget();
QGraphicsScene scene;
 
 
QGraphicsProxyWidget *proxy = new QGraphicsProxyWidget();
proxy->setWidget(circle);
proxy->setPos(0,1);
 
scene.addItem(proxy);
QTimer * time=new QTimer();
QTimer * timer=new QTimer();
 
QGraphicsProxyWidget *prox = new QGraphicsProxyWidget();
prox->setWidget(circl);
prox->setPos(200,100);
scene.addItem(prox);
 
/*QTimeLine *timer = new QTimeLine(5000);
timer->setFrameRange(0, 100);*/
 
QGraphicsView view(&scene);
 
 
 
QObject::connect(timer, SIGNAL(timeout()), circl, SLOT(nextAnimationFrame()));
timer->start();
sleep(5);
timer->stop();
QObject::connect(time, SIGNAL(timeout()),circle, SLOT(nextAnimationFrame()));
time->start();
view.show();
 
 
 
return app.exec();
 
}

#include <QApplication>

#include <QTimer>
#include<unistd.h>
#include<QGraphicsScene>
#include<QGraphicsProxyWidget>
#include<QGraphicsView>
#include "circlewidget.h"
#include<QTimeLine>


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

QApplication app(argc, argv);
CircleWidget * circle= new CircleWidget();
CircleWidget * circl= new CircleWidget();
QGraphicsScene scene;


QGraphicsProxyWidget *proxy = new QGraphicsProxyWidget();
proxy->setWidget(circle);
proxy->setPos(0,1);

scene.addItem(proxy);
QTimer * time=new QTimer();
QTimer * timer=new QTimer();

QGraphicsProxyWidget *prox = new QGraphicsProxyWidget();
prox->setWidget(circl);
prox->setPos(200,100);
scene.addItem(prox);

/*QTimeLine *timer = new QTimeLine(5000);
timer->setFrameRange(0, 100);*/

QGraphicsView view(&scene);



QObject::connect(timer, SIGNAL(timeout()), circl, SLOT(nextAnimationFrame()));
timer->start();
sleep(5);
timer->stop();
QObject::connect(time, SIGNAL(timeout()),circle, SLOT(nextAnimationFrame()));
time->start();
view.show();



return app.exec();

}

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circlewidget.cpp:

#include <QtGui>
 
#include "circlewidget.h"
#include<unistd.h>
#include <stdlib.h>
 
 CircleWidget::CircleWidget(QWidget *parent)
: QWidget(parent)
 {
 
 
setBackgroundRole(QPalette::Base);
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 
}
 
 
QSize CircleWidget::minimumSizeHint() const
{
return QSize(50, 50);
}
 
QSize CircleWidget::sizeHint() const
{
return QSize(180, 180);
}
 
void CircleWidget::nextAnimationFrame()
{
 
update();
++ frameNo;
 
}
 
 
void CircleWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(width() / 2, height() / 2);
 
for (int diameter = 0; diameter < 170; diameter += 6) {
 
    int delta = abs((frameNo %120) - diameter / 2);
    int alpha = 250 - (delta * delta) / 3 - diameter;
    if (alpha > 0) {
       painter.setPen(QPen(QColor(166, diameter / 2, 32, alpha), 5));
 
       painter.drawEllipse(QRectF(-diameter / 2.0, -diameter / 2.0,
                                  diameter, diameter));
 
    }
 
}
}

#include <QtGui>

#include "circlewidget.h"
#include<unistd.h>
#include <stdlib.h>

 CircleWidget::CircleWidget(QWidget *parent)
: QWidget(parent)
 {


setBackgroundRole(QPalette::Base);
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

}


QSize CircleWidget::minimumSizeHint() const
{
return QSize(50, 50);
}

QSize CircleWidget::sizeHint() const
{
return QSize(180, 180);
}

void CircleWidget::nextAnimationFrame()
{

update();
++ frameNo;

}


void CircleWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(width() / 2, height() / 2);

for (int diameter = 0; diameter < 170; diameter += 6) {

    int delta = abs((frameNo %120) - diameter / 2);
    int alpha = 250 - (delta * delta) / 3 - diameter;
    if (alpha > 0) {
       painter.setPen(QPen(QColor(166, diameter / 2, 32, alpha), 5));

       painter.drawEllipse(QRectF(-diameter / 2.0, -diameter / 2.0,
                                  diameter, diameter));

    }

}
}

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ciclewidget.h:

#ifndef CIRCLEWIDGET_H
#define CIRCLEWIDGET_H
 
#include <QWidget>
 
 class CircleWidget : public QWidget
 {
 Q_OBJECT
 
 public:
 
 CircleWidget(QWidget *parent = 0);
 QSize minimumSizeHint() const;
 QSize sizeHint() const;
 
 public slots:
 void nextAnimationFrame();
 
 protected:
 void paintEvent(QPaintEvent *event);
 
 private:
 
 int frameNo;
 };
 
 #endif

#ifndef CIRCLEWIDGET_H
#define CIRCLEWIDGET_H

#include <QWidget>

 class CircleWidget : public QWidget
 {
 Q_OBJECT

 public:

 CircleWidget(QWidget *parent = 0);
 QSize minimumSizeHint() const;
 QSize sizeHint() const;

 public slots:
 void nextAnimationFrame();

 protected:
 void paintEvent(QPaintEvent *event);

 private:

 int frameNo;
 };

 #endif

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