I want to read sizes information from a database table and want to store them in a map. I use visual studio 2022 with qt tools addon and qt 6.4.
The m_sizes map is a local variable in a configurationmanager class, the manager class lives as long as the program runs.
If i set the sizes manually (version 1) it works fine.
If I read the sizes from a database table (version 2) I get an error message when leaving the routine.
SetSize
void ConfigurationHandler::setSize(Sizes key, qint16 size)
{
if (!m_sizes.contains(key)) m_sizes.insert(key, size);
else m_sizes[key] = size;
}
Version 1 - without database usage
void ConfigurationHandler::initializeSizes()
{
setSize(Sizes::DisplayHeight, 100);
setSize(Sizes::DisplayWidth, 50);
setSize(Sizes::DisplayEncoderWidth, 70);
setSize(Sizes::DisplayHeaderHeight, 20);
}
Version 2 - with database usage
void ConfigurationHandler::initializeSizes() {
QMap<QString, QString> rows;
QSqlDatabase db;
db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("c:/users/arne/workspace/trm80eplus/trm80eplus.db");
db.open();
QSqlQuery q = db.exec("select * from configuration_sizes");
while (q.next() == true) rows.insert(q.value("key").toString(), q.value("value").toString());
setSize(Sizes::DisplayHeight, rows["display_height"].toInt());
setSize(Sizes::DisplayWidth, rows["display_width"].toInt());
setSize(Sizes::DisplayEncoderWidth, rows["display_encoderWidth"].toInt());
db.close();
}
Error is
Breakpoint instruction executed
A breakpoint statement (__debugbreak() statement or similar call) was executed in TRM80EPlus.exe.
Is it because the value from rows is no longer available when leaving the routine? But actually I copy the value from the database to m_sizes and no reference or?
