Help with screenshot API.

[rahul vadhyar]

Hi,
I am Rahul, a college student from India.
I am working on a project where I need to take screenshots of the screen
for further processing. From looking online and looking at the spectacle
code, I have figured out that you need to install the application in
/usr/bin and that the .desktop file must contain the following

X-DBUS-StartupType=Unique
X-DBUS-ServiceName=org.kde.koolintelligence
X-KDE-DBUS-Restricted-Interfaces=org.kde.KWin.ScreenShot2
X-KDE-Wayland-Interfaces=org_kde_plasma_window_management,zkde_screencast_unstable_v1

However, even after doing this, I am getting the following error

Screenshot failed: No such method 'CaptureWorkspace' in interface 'org.
kde.KWin.ScreenShot2' at object path '/org/kde/KWin/ScreenShot2' (signature
'')

My code is attached below for reference. Please let me know how I can
resolve this issue.

#include <QtDBus/QtDBus>
#include <QDBusUnixFileDescriptor>
#include "logging.hpp"
#include <fcntl.h>
static const QString screenShotService =
QString().fromStdString("org.kde.KWin.ScreenShot2");
static const QString screenShotObjectPath =
QString().fromStdString("/org/kde/KWin/ScreenShot2");
static const QString screenShotInterface =
QString().fromStdString("org.kde.KWin.ScreenShot2");
void takeScreenshotKwin(std::string path) {
    // Connect to KWin's screenshot service
    QDBusInterface interface(
        screenShotService,
        screenShotObjectPath,
        screenShotInterface,
        QDBusConnection::sessionBus() // Bus connection
    );

    if (!interface.isValid()) {
        LOG_ERROR("takeScreenshotKwin", "Failed to connect to KWin
Screenshot interface");
        return;
    }

    QDBusReply<QString> reply =
interface.call(QString().fromStdString("CaptureWorkspace"));

    if (reply.isValid()) {
        LOG_INFO("takeScreenshotKwin", "Screenshot saved at: " + path);
    } else {
        LOG_ERROR("takeScreenshotKwin", "Screenshot failed: " +
reply.error().message().toStdString());
    }
}
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