projects/infoscreen/pictureview.cpp

#include "pictureview.h"

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

PictureView::PictureView(QWidget* parent)
        : QWidget(parent)
{
    http.connect(&http, SIGNAL(requestFinished(int,bool)),this, SLOT(onLoad(int,bool)) );
}

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 url(requestedUrl);
        http.setHost(url.host() );
        http.get(url.path(), 0);
    }
}

void PictureView::onLoad(int id, bool ok)
{
    Q_UNUSED(id);
    Q_UNUSED(ok);
    qint64 byteCount = http.bytesAvailable();

    if (byteCount > 0) {

        QByteArray data = http.readAll();   

        QPixmap pixmap;
        pixmap.loadFromData( data );

        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	http.connect(&http, SIGNAL(requestFinished(int,bool)),this, SLOT(onLoad(int,bool)) );
13	}
14
15	void PictureView::paintEvent ( QPaintEvent* event)
16	{
17	Q_UNUSED(event);
18	QPainter painter(this);
19	painter.drawPixmap(0,0,image);
20	painter.end();
21	}
22
23	void PictureView::loadFromUrl(QString source)
24	{
25	QMap<QString, QPixmap>::iterator it = map.find(source);
26	if (it != map.end() ) {
27	image = it.value();
28	this->repaint();
29	} else {
30	requestedUrl = source;
31
32	QUrl url(requestedUrl);
33	http.setHost(url.host() );
34	http.get(url.path(), 0);
35	}
36	}
37
38	void PictureView::onLoad(int id, bool ok)
39	{
40	Q_UNUSED(id);
41	Q_UNUSED(ok);
42	qint64 byteCount = http.bytesAvailable();
43
44	if (byteCount > 0) {
45
46	QByteArray data = http.readAll();
47
48	QPixmap pixmap;
49	pixmap.loadFromData( data );
50
51	QPixmap scaledImage = pixmap.scaledToHeight(size().height(), Qt::SmoothTransformation );
52
53	image = scaledImage;
54	this->repaint();
55
56	map.insert(requestedUrl, scaledImage);
57	}
58	}