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qcam: Introduce a toolbar and camera switching

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Implement a quit button, and a list of cameras.

Selecting a different camera from the Toolbar will stop the current
stream, and start streaming the chosen camera device if it can be
acquired.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Kieran Bingham 2020-02-05 15:12:06 +00:00
parent 871879eb73
commit fb497899e2
2 changed files with 67 additions and 2 deletions
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64
src/qcam/main_window.cpp
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@ -10,9 +10,12 @@
#include <string>
#include <sys/mman.h>
#include <QComboBox>
#include <QCoreApplication>
#include <QInputDialog>
#include <QTimer>
#include <QToolBar>
#include <QToolButton>
#include <libcamera/camera_manager.h>
#include <libcamera/version.h>
@ -27,6 +30,8 @@ MainWindow::MainWindow(CameraManager *cm, const OptionsParser::Options &options)
{
int ret;
createToolbars();
title_ = "QCam " + QString::fromStdString(CameraManager::version());
setWindowTitle(title_);
connect(&titleTimer_, SIGNAL(timeout()), this, SLOT(updateTitle()));
@ -40,8 +45,7 @@ MainWindow::MainWindow(CameraManager *cm, const OptionsParser::Options &options)
ret = startCapture();
if (ret < 0)
QTimer::singleShot(0, QCoreApplication::instance(),
&QCoreApplication::quit);
quit();
}
MainWindow::~MainWindow()
@ -53,6 +57,39 @@ MainWindow::~MainWindow()
}
}
int MainWindow::createToolbars()
{
QAction *action;
toolbar_ = addToolBar("Main");
/* Disable right click context menu. */
toolbar_->setContextMenuPolicy(Qt::PreventContextMenu);
action = toolbar_->addAction("Quit");
connect(action, &QAction::triggered, this, &MainWindow::quit);
/* Camera selection. */
QComboBox *cameraCombo = new QComboBox();
connect(cameraCombo, QOverload<int>::of(&QComboBox::activated),
this, &MainWindow::switchCamera);
for (const std::shared_ptr<Camera> &cam : cm_->cameras())
cameraCombo->addItem(QString::fromStdString(cam->name()));
toolbar_->addWidget(cameraCombo);
toolbar_->addSeparator();
return 0;
}
void MainWindow::quit()
{
QTimer::singleShot(0, QCoreApplication::instance(),
&QCoreApplication::quit);
}
void MainWindow::updateTitle()
{
unsigned int duration = frameRateInterval_.elapsed();
@ -66,6 +103,29 @@ void MainWindow::updateTitle()
setWindowTitle(title_ + " : " + QString::number(fps, 'f', 2) + " fps");
}
void MainWindow::switchCamera(int index)
{
const auto &cameras = cm_->cameras();
if (static_cast<unsigned int>(index) >= cameras.size())
return;
const std::shared_ptr<Camera> &cam = cameras[index];
if (cam->acquire()) {
std::cout << "Failed to acquire camera " << cam->name() << std::endl;
return;
}
std::cout << "Switching to camera " << cam->name() << std::endl;
stopCapture();
camera_->release();
camera_ = cam;
startCapture();
}
std::string MainWindow::chooseCamera()
{
QStringList cameras;