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Revision as of 01:23, 11 October 2012 by hamishwillee (Talk | contribs)

Still Image capture using Qt Mobility

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Article Metadata
Compatibility
Platform(s):
Symbian
Article
Created: skumar_rao (27 Mar 2010)
Last edited: hamishwillee (11 Oct 2012)
ID Creation date 27th Mar 2010
Platform S60 5th Edition Tested on devices Nokia N97 Mini
Category Qt Mobility Subcategory Multimedia


Keywords (APIs, classes, methods, functions): QCamera, QStillImageCapture


Contents

Overview

This article demonstrate how to capture still images using Qt Mobility

Keywords

Project configuration file (.Pro file)

  • Add the Qt Mobility project configuration option in the .Pro file as shown below
CONFIG += mobility
MOBILITY += multimedia

Header File

#include <qcamera.h>
#include <qstillimagecapture.h>
 
public slots:
void captureImage();
void error(QCamera::Error);
void imageCaptured(const QString &fileName, const QImage &preview);
private:
void InitCamera();
 
private:
QCamera* m_camera;
QStillImageCapture* m_stillImageCapture;

Source File

void ImageCapture::InitCamera() {
QByteArray cameraDevices = QCamera::availableDevices()[0];
m_camera = new QCamera(cameraDevices);
 
connect(m_camera, SIGNAL(error(QCamera::Error)), this, SLOT(error(QCamera::Error)));
 
m_camera->setFocusMode(QCamera::AutoFocus);
 
m_stillImageCapture = new QStillImageCapture(m_camera);
connect(m_stillImageCapture, SIGNAL(imageCaptured(QString,QImage)), this, SLOT(imageCaptured(QString,QImage)));
 
if (m_camera->state() == QCamera::ActiveState) {
m_camera->stop();
}
m_camera->start();
}
void ImageCapture::error(QCamera::Error e) {
switch (e) {
case QCamera::CameraError: {
QMessageBox::warning(this, "Camera error", "General camera error");
break;
}
case QCamera::NotReadyToCaptureError: {
QMessageBox::warning(this, "Camera error", "Camera not ready to capture image");
break;
}
case QCamera::InvalidRequestError: {
QMessageBox::warning(this, "Camera error", "Invalid request");
break;
}
case QCamera::ServiceMissingError: {
QMessageBox::warning(this, "Camera error", "Service missing");
break;
}
case QCamera::NotSupportedFeatureError: {
QMessageBox::warning(this, "Camera error", "Not supported feature");
break;
}
default:
break;
};
}
void ImageCapture::captureImage() {
if (m_stillImageCapture->isReadyForCapture()) {
m_stillImageCapture->capture(QString("camera_capture.jpg"));
}
else {
QMessageBox::warning(this, "Camera error", "Camera not ready");
}
 
}
void ImageCapture::imageCaptured(const QString &fileName, const QImage &preview) {
QMessageBox::information(this, "Image Capatured", fileName);
}

Classes

  • QCamera
  • QStillImageCapture

Reference links

--skumar_rao 16:28, 27 March 2010 (UTC)

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