Qmake rules for C++ plugin extension to QML

scumpyt

Hi all,

I am struggling with the necessary qmake magic to make use of a C++ plugin I built for QML. (On Windows)

My project is just an at-home learning adventure where I download my Strava cycling activities and try to do some interesting statistical analysis on them. That all works fine.

The project is laid out as follows:

I.e. 3 subdirs... 'cppSrc' is the main plugin, 'main' is my test app, where I want to use the plugin in QML, and 'UnitTests' is obvious.

The 'DeepStats.pro' file looks like this:
TEMPLATE = subdirs

SUBDIRS +=
main
UnitTests
cppSrc

main.depends = cppSrc
UnitTests.depends = cppSrc

The 'cppSrc.pro' file looks like this:
QT -= gui
QT += core network qml
CONFIG += qt shared plugin

! include(../common.pri) {
error("Couldn't find the common.pri file")
}

TARGET = deepstats
TEMPLATE = lib

DEFINES += DEEPSTATS_LIBRARY

SOURCES +=
stravaaccess.cpp
stravastats.cpp
stravaactivities.cpp
stravaactivity.cpp
stravarangesummary.cpp
stravaactivitiesmodel.cpp
stravaportal.cpp

HEADERS +=
deepstats_global.h
stravaaccess.h
stravastats.h
stravaactivities.h
stravaactivity.h
stravarangesummary.h
stravaactivitiesmodel.h
stravaportal.h
deepstats_plugin.h

unix {
target.path = /usr/lib
INSTALLS += target
}

The 'main.pro' file looks like this:
QT += qml quick

CONFIG += c++11

! include(../common.pri) {
error("Couldn't find the common.pri file")
}

SOURCES += main.cpp

INCLUDEPATH += ../cppSrc

RESOURCES += qml.qrc

QML_IMPORT_PATH = .

include(deployment.pri)

QMAKE_RPATHDIR += $$DESTDIR

LIBS += -L$$DESTDIR -ldeepstats

My 'deepstats_plugin.h' file looks like this:
#ifndef DEEPSTATS_PLUGIN_H
#define DEEPSTATS_PLUGIN_H

#include <QtQml>
#include <QQmlExtensionPlugin>
#include "stravaportal.h"
#include "stravaactivitiesmodel.h"

class DeepStats_Plugin : public QQmlExtensionPlugin
{
Q_OBJECT
Q_PLUGIN_METADATA(IID QQmlExtensionInterface_iid)
public:
void registerTypes(const char *uri)
{
Q_ASSERT(uri == QLatin1String("ca.scumpyware.deepstats"));
qmlRegisterType<StravaPortal>(uri, 1, 0, "StravaPortal");
qmlRegisterUncreatableType<StravaActivitiesModel>(uri, 1, 0, "StravaActivitiesModel",
"StravaActivitiesModel is uncreatable");
}
};

#endif // DEEPSTATS_PLUGIN_H

my 'qmldir' file (in cppSrc), looks like this:
module ca.scumpyware.deepstats
plugin deepstats

So, if I add 'import ca.scumpyware.deepstats 1.0' to my main.qml file, I get the following error:

QQmlApplicationEngine failed to load component
qrc:/main.qml:5 module "ca.scumpyware.deepstats" is not installed

Can somebody please explain what I need to install, and where, and how to make the qmake/*.pro file changes to accomplish this???

Thanks in advance...

scumpyt

Hi... I got this to work by adding this to my cppSrc.pro file:
win32 {
# The dir I want the plugin installed to...
WAYNES_PLUGIN_DIR = C:\Users\wayne_000\Documents\QtProjects\WaynesPlugins\ca\scumpyware\deepstats
##message($$WAYNES_PLUGIN_DIR)

# If my dir doesn't exist, create it...
PLUGIN_INSTALL_DIR = $$WAYNES_PLUGIN_DIR
if (!exists($$PLUGIN_INSTALL_DIR)) {
    message("CREATING DIR")
    createpluginsdir.commands = $(MKDIR) $$PLUGIN_INSTALL_DIR

    QMAKE_EXTRA_TARGETS += createpluginsdir
    PRE_TARGETDEPS += createpluginsdir
}
else {
    message("NOT CREATING DIR")
}


# Now, copy the lib's & the qmldir file to the plugin install dir...
EXTRA_BINFILES += \
    $$DESTDIR/*.dll \
    $$DESTDIR/*.lib \
    $$DESTDIR/*.pdb \
    $$PWD/qmldir
EXTRA_BINFILES_WIN = $${EXTRA_BINFILES}
EXTRA_BINFILES_WIN ~= s,/,\\,g
    DESTDIR_WIN = $${PLUGIN_INSTALL_DIR}
DESTDIR_WIN ~= s,/,\\,g
for(FILE,EXTRA_BINFILES_WIN){
            QMAKE_POST_LINK +=$$quote(cmd /c copy /y $${FILE} $${DESTDIR_WIN}$$escape_expand(\n\t))
}

}

Then, I added the following to my main.cpp file:

// ******************************************************************************
// Add the import path to my plugins...
QStringList importPathList = engine.importPathList();
importPathList.append("C:/Users/wayne_000/Documents/QtProjects/WaynesPlugins");
engine.setImportPathList(importPathList);
qDebug() << "Path List: " << engine.importPathList();
// ******************************************************************************

My logic to only create my output plugin directory if it doesn't already exist doesn't seem to work all the time, but if you delete it manually, it all works. Kludgey, I know, but this has been quite frustrating. Surely there is an easier way!!!!