2 * This file is part of CameraPlus.
4 * Copyright (C) 2012 Mohammed Sameer <msameer@foolab.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "qtcamgraphicsviewfinder.h"
22 #include "qtcamconfig.h"
23 #include "qtcamdevice.h"
25 #include "qtcamviewfinderrenderer.h"
27 #include <QGraphicsSceneResizeEvent>
29 class QtCamGraphicsViewfinderPrivate {
31 void ensureBackend() {
33 renderer = QtCamViewfinderRenderer::create(conf, q_ptr);
35 qCritical() << "Failed to create a viewfinder renderer";
39 renderer->resize(q_ptr->size());
40 QObject::connect(renderer, SIGNAL(updateRequested()), q_ptr, SLOT(updateRequested()));
41 QObject::connect(renderer, SIGNAL(renderAreaChanged()), q_ptr, SIGNAL(renderAreaChanged()));
42 QObject::connect(renderer, SIGNAL(videoResolutionChanged()), q_ptr, SIGNAL(videoResolutionChanged()));
52 QtCamViewfinderRenderer *renderer;
55 QtCamGraphicsViewfinder *q_ptr;
59 QtCamGraphicsViewfinder::QtCamGraphicsViewfinder(QtCamConfig *config, QGraphicsItem *parent) :
60 QGraphicsWidget(parent), d_ptr(new QtCamGraphicsViewfinderPrivate) {
65 d_ptr->enabled = true;
68 QtCamGraphicsViewfinder::~QtCamGraphicsViewfinder() {
69 delete d_ptr->renderer;
70 delete d_ptr; d_ptr = 0;
73 GstElement *QtCamGraphicsViewfinder::sinkElement() {
74 d_ptr->ensureBackend();
76 if (!d_ptr->renderer) {
80 return d_ptr->renderer->sinkElement();
83 bool QtCamGraphicsViewfinder::setDevice(QtCamDevice *device) {
84 if (device && d_ptr->dev == device) {
89 qWarning() << "QtCamGraphicsViewfinder: viewfinder cannot be replaced.";
94 qWarning() << "QtCamGraphicsViewfinder: viewfinder cannot be unset.";
98 // This is to break the loop.
100 if (!device->setViewfinder(this)) {
105 d_ptr->resetBackend();
110 void QtCamGraphicsViewfinder::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
115 painter->fillRect(boundingRect(), Qt::black);
117 if (!d_ptr->renderer || !d_ptr->enabled) {
121 d_ptr->renderer->paint(painter);
124 void QtCamGraphicsViewfinder::resizeEvent(QGraphicsSceneResizeEvent *event) {
125 QGraphicsWidget::resizeEvent(event);
127 if (!d_ptr->renderer) {
131 d_ptr->renderer->resize(event->newSize());
134 void QtCamGraphicsViewfinder::updateRequested() {
135 if (d_ptr->enabled) {
140 void QtCamGraphicsViewfinder::stop() {
141 d_ptr->resetBackend();
143 setRenderingEnabled(true);
146 QRectF QtCamGraphicsViewfinder::renderArea() const {
147 if (!d_ptr->renderer) {
151 return d_ptr->renderer->renderArea();
154 QSizeF QtCamGraphicsViewfinder::videoResolution() const {
155 if (!d_ptr->renderer) {
159 return d_ptr->renderer->videoResolution();
162 bool QtCamGraphicsViewfinder::isRenderingEnabled() const {
163 return d_ptr->enabled;
166 void QtCamGraphicsViewfinder::setRenderingEnabled(bool enabled) {
167 if (d_ptr->enabled != enabled) {
168 d_ptr->enabled = enabled;
170 emit renderingEnabledChanged();