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Skeleton code for a non-blocking UI thread for downloading dives from the DC

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This is the skeleton code for a non-blocking ui-thread
It already creates the first-thread ( 'do not block the ui' )
and the second thread ('download from the dive computer')
We can in the future merge both in the same place - I didn't
want to do that now because the download function is written
in the libdivecomputer.c code, and I cant just transform that
to a QThread and use signals, so I used two threads for that.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
This commit is contained in:
Tomaz Canabrava 2013-05-20 16:43:33 -03:00
parent 15bb4fccbb
commit c7a5d0490f
8 changed files with 249 additions and 89 deletions
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73
qt-ui/downloadfromdivecomputer.cpp Normal file
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#include "downloadfromdivecomputer.h"
#include "ui_downloadfromdivecomputer.h"
#include "../libdivecomputer.h"
#include <QThread>
#include <QDebug>
namespace DownloadFromDcGlobal{
const char *err_string;
};
extern const char *progress_bar_text;
extern double progress_bar_fraction;
DownloadFromDCWidget::DownloadFromDCWidget(QWidget* parent, Qt::WindowFlags f) :
QDialog(parent, f), ui(new Ui::DownloadFromDiveComputer), thread(0)
{
ui->setupUi(this);
ui->progressBar->hide();
ui->progressBar->setMinimum(0);
ui->progressBar->setMaximum(100);
}
void DownloadFromDCWidget::on_cancel_clicked()
{
close();
}
void DownloadFromDCWidget::on_ok_clicked()
{
ui->progressBar->setValue(0);
ui->progressBar->show();
if(thread){
thread->deleteLater();
}
device_data_t data;
// still need to fill the data info here.
thread = new InterfaceThread(this, &data);
connect(thread, SIGNAL(updateInterface(int)), ui->progressBar, SLOT(setValue(int)), Qt::QueuedConnection); // Qt::QueuedConnection == threadsafe.
connect(thread, SIGNAL(updateInterface(int)), this, SLOT(setValue(int)), Qt::QueuedConnection); // Qt::QueuedConnection == threadsafe.
thread->start();
}
DownloadThread::DownloadThread(device_data_t* data): data(data)
{
}
void DownloadThread::run()
{
do_libdivecomputer_import(data);
qDebug() << "Download thread started";
}
InterfaceThread::InterfaceThread(QObject* parent, device_data_t* data): QThread(parent), data(data)
{
}
void InterfaceThread::run()
{
DownloadThread *download = new DownloadThread(data);
download->start();
while(download->isRunning()){
msleep(200);
updateInterface(progress_bar_fraction *100);
}
updateInterface(100);
}