projects/infoscreen/pictureview.cpp

#include "pictureview.h"

#include <QPainter>
#include <QDebug>

#include "httpwrapper.h"

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


// TODO: if the picture doesn't fill the screen, fill the canvas with black before drawing the picture and 
// place the image mid-screen
void PictureView::paintEvent ( QPaintEvent* event)
{    
    Q_UNUSED(event);

    QSize s = this->size();

    QBrush blackBrush(Qt::black);

    QPainter painter(this);
    painter.fillRect( QRect(0,0,s.width(), s.height()), blackBrush);

    int x = 0;
    int y = 0;

    if (image.width() < s.width() )  {
        x = (s.width() - image.width()) / 2;
    }
    if (image.height() < s.height() ) {
        y = (s.height() - image.height()) / 2;
    }


    painter.drawPixmap(x,y,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 {
        qDebug() << "Loading file " << source;

        QPixmap pixmap;
        if (source.at(0) == '/') { //local file
            pixmap = QPixmap(source);
        } else {
            QByteArray data = HttpWrapper::getSyncData(source);
            pixmap.loadFromData( data );
        }

        QPixmap scaledImage = pixmap.scaled(size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);

        image = scaledImage;
        this->repaint();

        map.insert(source, scaledImage);

    }
}
1	#include "pictureview.h"
2
3	#include <QPainter>
4	#include <QDebug>
5
6	#include "httpwrapper.h"
7
8	PictureView::PictureView(QWidget* parent)
9	: QWidget(parent)
10	{
11	}
12
13
14	// TODO: if the picture doesn't fill the screen, fill the canvas with black before drawing the picture and
15	// place the image mid-screen
16	void PictureView::paintEvent ( QPaintEvent* event)
17	{
18	Q_UNUSED(event);
19
20	QSize s = this->size();
21
22	QBrush blackBrush(Qt::black);
23
24	QPainter painter(this);
25	painter.fillRect( QRect(0,0,s.width(), s.height()), blackBrush);
26
27	int x = 0;
28	int y = 0;
29
30	if (image.width() < s.width() ) {
31	x = (s.width() - image.width()) / 2;
32	}
33	if (image.height() < s.height() ) {
34	y = (s.height() - image.height()) / 2;
35	}
36
37
38	painter.drawPixmap(x,y,image);
39	painter.end();
40	}
41
42	void PictureView::loadFromUrl(QString source)
43	{
44	QMap<QString, QPixmap>::iterator it = map.find(source);
45	if (it != map.end() ) {
46	image = it.value();
47	this->repaint();
48	} else {
49	qDebug() << "Loading file " << source;
50
51	QPixmap pixmap;
52	if (source.at(0) == '/') { //local file
53	pixmap = QPixmap(source);
54	} else {
55	QByteArray data = HttpWrapper::getSyncData(source);
56	pixmap.loadFromData( data );
57	}
58
59	QPixmap scaledImage = pixmap.scaled(size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
60
61	image = scaledImage;
62	this->repaint();
63
64	map.insert(source, scaledImage);
65
66	}
67	}