Hello Jan,
finally I found some time to upgrade my OS and got a newer Plasma Version but
I'm still struggling with the Screenshot Portal.
Here is my implementation, almost identical to yours from the test that you
have linked me (pasting here only the relevant methods):
void WaylandImageGrabber::grab()
{
auto message =
QDBusMessage::createMethodCall(QLatin1String("org.freedesktop.portal.Desktop"),
QLatin1String("/org/freedesktop/portal/desktop"),
QLatin1String("org.freedesktop.portal.Screenshot"),
QLatin1String("Screenshot"));
message << QLatin1String("wayland:") <<
QVariantMap{{QLatin1String("interactive"), false},
{QLatin1String("handle_token"), getRequestToken()}};
auto pendingCall = QDBusConnection::sessionBus().asyncCall(message);
auto watcher = new QDBusPendingCallWatcher(pendingCall);
connect(watcher, &QDBusPendingCallWatcher::finished, [this]
(QDBusPendingCallWatcher *watcher) {
QDBusPendingReply<QDBusObjectPath> reply = *watcher;
if (reply.isError()) {
qDebug("Couldn't get reply");
qWarning("Error: %s", qPrintable(reply.error().message()));
} else {
qDebug("Got reply");
QDBusConnection::sessionBus().connect(QString(),
reply.value().path(),
QLatin1String("org.freedesktop.portal.Request"),
QLatin1String("Response"),
this,
SLOT(gotScreenshotResponse(uint,QVariantMap)));
}
});
}
void WaylandImageGrabber::gotScreenshotResponse(uint response, const
QVariantMap& results)
{
qDebug("Response called");
if (!response) {
if (results.contains(QLatin1String("uri"))) {
qDebug("Success");
emit
finished(CaptureDto(QPixmap::fromImage(QImage(results.value(QLatin1String("uri")).toString()))));
}
} else {
qDebug("Failed to take screenshot");
}
}
QString WaylandImageGrabber::getRequestToken()
{
mRequestTokenCounter += 1;
return QString("u%1").arg(mRequestTokenCounter);
}
I get the dialog which asks me what type of screenshot I want to take I select
it, a small image is show in the dialog and I can click on save (which saves
the image in my home directory) but the gotScreenshotResponse is never called.
Any idea why?
Can I tell the dialog where to save those images?
Can I tell the dialog right away what type of screenshot I want to take?
Can I just share the screenshot with my application without saving it?
Thanks in advance for your help!
Best regards,
Damir
________________________________
From: kde-devel <[email protected]> on behalf of Damir Porobic
<[email protected]>
Sent: Monday, August 31, 2020 13:22
To: [email protected] <[email protected]>
Subject: Re: Using xdg-desktop-portal-kde to take screenshots
Thanks, that helps. I'll upgrade my OS, the latest version seems to ship Plasma
5.18
Best regards,
Damir
________________________________
From: kde-devel <[email protected]> on behalf of Jan Grulich
<[email protected]>
Sent: Monday, August 31, 2020 11:04
To: [email protected] <[email protected]>
Subject: Re: Using xdg-desktop-portal-kde to take screenshots
Hi,
unfortunately the Screenshot portal doesn't seem to be present in Plasma 5.12,
it was added into Plasma 5.13.
Regards,
Jan
ne 30. 8. 2020 v 10:38 odesílatel Damir Porobic
<[email protected]<mailto:[email protected]>> napsal:
Hey Jan,
thanks for the Feedback, that is indeed a good tip, I'll have a look at it.
Another question, do I need to activate it or is it available only after a
specific version?
I'm using Plasma 5.12.8 and it doesn't seem to be available.
Regards,
Damir
________________________________
From: kde-devel <[email protected]<mailto:[email protected]>>
on behalf of Jan Grulich <[email protected]<mailto:[email protected]>>
Sent: Sunday, August 23, 2020 14:58
To: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>>
Subject: Re: Using xdg-desktop-portal-kde to take screenshots
Hi,
you can check how we use it in xdg-portal-test-kde (a simple app to test
various portals).
The code is here:
https://invent.kde.org/libraries/xdg-portal-test-kde/-/blob/master/src/portaltest.cpp#L498
Regards,
Jan
út 18. 8. 2020 v 12:59 odesílatel Méven
<[email protected]<mailto:[email protected]>> napsal:
Le mar. 18 août 2020 à 12:04,
<[email protected]<mailto:[email protected]>> a écrit :
Date: Mon, 17 Aug 2020 12:44:35 +0000
From: Damir Porobic <[email protected]<mailto:[email protected]>>
To: "[email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]>>
Subject: Re: Using xdg-desktop-portal-kde to take screenshots
Message-ID:
<am0pr09mb389099fac1a15b22f0e6d4afe5...@am0pr09mb3890.eurprd09.prod.outlook.com<mailto:am0pr09mb389099fac1a15b22f0e6d4afe5...@am0pr09mb3890.eurprd09.prod.outlook.com>>
Content-Type: text/plain; charset="iso-8859-1"
Hello,
has anyone experience with this portal?
Best regards,
Damir
________________________________
From: kde-devel <[email protected]<mailto:[email protected]>>
on behalf of Damir Porobic
<[email protected]<mailto:[email protected]>>
Sent: Thursday, August 13, 2020 16:16
To: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>>
Subject: Using xdg-desktop-portal-kde to take screenshots
Hello,
I'm trying use the xdg-desktop-portal-kde
(https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/blob/master/src/screenshot.cpp)
portal in order to take screenshots under Wayland.
If I understand correctly, making a DBus Call like this should open a Dialog
with a Screenshot that can be shared with my application.
*********************************
QDBusInterface interface(QStringLiteral("org.freedesktop.portal.Desktop"),
QStringLiteral("/org/freedesktop/portal/Screenshot"),
QStringLiteral("org.freedesktop.portal.Screenshot"));
QDBusPendingReply<QDBusObjectPath> reply;
reply = interface.call(QStringLiteral("Screenshot"), "", QVariantMap());
if (reply.isError()) {
qCritical("Invalid reply from DBus: %s",
qPrintable(reply.error().message()));
emit canceled();
} else {
qCritical("Dbus success: %s", qPrintable(reply.argumentAt<0>().path()));
}
*********************************
But the path to the image is not returned in the result from this call. How am
I supposed to get the result?
Is there any example implementation that uses this portal? In Spectacle I have
only seen the solution using org.kde.plasmashell, but not the portal solution.
Thanks in advance!
Best regards
Damir
Hi Damir,
You need to pass an instance of QVariantMap that will be filled up with a uri
field according to the code:
auto result = QVariantMap();
reply = interface.call(QStringLiteral("Screenshot"), "", &result);
result.value("uri");
But you might be missing parameters also :
uint Screenshot(const QDBusObjectPath &handle,
const QString &app_id,
const QString &parent_window,
const QVariantMap &options,
QVariantMap &results);
Also the file is saved in QStandardPaths::PicturesLocation with a timestamp.
Documentation is at
https://flatpak.github.io/xdg-desktop-portal/portal-docs.html#gdbus-org.freedesktop.impl.portal.Screenshot
I hope this helps,
Kind regards,
--
Méven
