projects/infoscreen/pictureview.cpp

#include "pictureview.h"

#include <QGraphicsView>
#include <QGraphicsScene>
#include <QDebug>
#include <QUrl>
#include <QHttp>

PictureView::PictureView(QWidget* parent)
        : QWidget(parent)
{
}

void PictureView::paintEvent ( QPaintEvent* event)
{    
 //   Q_UNUSED(event);
    QPainter painter(this);
    painter.drawPixmap(0,0,image);
    painter.end();
}

void PictureView::loadFromUrl(QString source)
{
    QMap<QString, QPixmap>::iterator it = map.find(source);
    if (it != map.end() ) {
        image = it.value();
        this->repaint();
    } else {
        requestedUrl = source;

        QUrl imageUrl(requestedUrl);
        http = new QHttp(imageUrl.host() );
        http->connect(http, SIGNAL(requestFinished(int,bool)),this, SLOT(onLoad(int,bool)) );

        http->get(imageUrl.path(), 0);
    }
}

void PictureView::onLoad(int id, bool ok)
{
//    Q_UNUSED(id);
//    Q_UNUSED(ok);

    QByteArray data = http->readAll();

    QPixmap pixmap;
    pixmap.loadFromData( data );
    delete http;

    QPixmap scaledImage = pixmap.scaledToHeight(size().height(), Qt::SmoothTransformation );

    image = scaledImage;
    this->repaint();

    map.insert(requestedUrl, scaledImage);

}
1	#include "pictureview.h"
2
3	#include <QGraphicsView>
4	#include <QGraphicsScene>
5	#include <QDebug>
6	#include <QUrl>
7	#include <QHttp>
8
9	PictureView::PictureView(QWidget* parent)
10	: QWidget(parent)
11	{
12	}
13
14	void PictureView::paintEvent ( QPaintEvent* event)
15	{
16	// Q_UNUSED(event);
17	QPainter painter(this);
18	painter.drawPixmap(0,0,image);
19	painter.end();
20	}
21
22	void PictureView::loadFromUrl(QString source)
23	{
24	QMap<QString, QPixmap>::iterator it = map.find(source);
25	if (it != map.end() ) {
26	image = it.value();
27	this->repaint();
28	} else {
29	requestedUrl = source;
30
31	QUrl imageUrl(requestedUrl);
32	http = new QHttp(imageUrl.host() );
33	http->connect(http, SIGNAL(requestFinished(int,bool)),this, SLOT(onLoad(int,bool)) );
34
35	http->get(imageUrl.path(), 0);
36	}
37	}
38
39	void PictureView::onLoad(int id, bool ok)
40	{
41	// Q_UNUSED(id);
42	// Q_UNUSED(ok);
43
44	QByteArray data = http->readAll();
45
46	QPixmap pixmap;
47	pixmap.loadFromData( data );
48	delete http;
49
50	QPixmap scaledImage = pixmap.scaledToHeight(size().height(), Qt::SmoothTransformation );
51
52	image = scaledImage;
53	this->repaint();
54
55	map.insert(requestedUrl, scaledImage);
56
57	}