Switch to KNSQuick for getting new wallpapers

Summary:
This switches the image plugin to using KNewStuffQuick instead of
launching the widget dialog through that ol' widget dialog hack.
It further uses the big preview mode by default, which just seems
to make a lot of sense for wallpapers.

Test Plan:
Without: Uses the old dialog
With: Uses the new dialog, as seen below
{F7882885}

Reviewers: mart, #plasma, ngraham

Reviewed By: mart

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D26665

wallpapers/image/image.cpp

@@ -47,7 +47,6 @@
 #include <KRandom>
 #include <KIO/Job>
 #include <krun.h>
-#include <KNewStuff3/KNS3/DownloadDialog>
 #include <klocalizedstring.h>
 
 #include <Plasma/Theme>
@@ -644,27 +643,9 @@ void Image::backgroundsFound()
     }
 }
 
-void Image::getNewWallpaper(QQuickItem *ctx)
-{
-    if (!m_newStuffDialog) {
-        m_newStuffDialog = new KNS3::DownloadDialog( QString::fromLatin1("wallpaper.knsrc") );
-        KNS3::DownloadDialog *strong = m_newStuffDialog.data();
-        strong->setTitle(i18n("Download Wallpapers"));
-        connect(m_newStuffDialog.data(), &QDialog::accepted, this, &Image::newStuffFinished);
-    }
-
-    if (ctx && ctx->window()) {
-        m_newStuffDialog->setWindowModality(Qt::WindowModal);
-        m_newStuffDialog->winId(); // so it creates the windowHandle();
-        m_newStuffDialog->windowHandle()->setTransientParent(ctx->window());
-    }
-
-    m_newStuffDialog.data()->show();
-}
-
 void Image::newStuffFinished()
 {
-    if (m_model && (!m_newStuffDialog || m_newStuffDialog.data()->changedEntries().size() > 0)) {
+    if (m_model) {
         m_model->reload(m_usersWallpapers);
     }
 }

wallpapers/image/image.h

@@ -99,7 +99,6 @@ class Image : public QObject, public QQmlParserStatus
         Q_INVOKABLE void removeSlidePath(const QString &path);
         Q_INVOKABLE void openFolder(const QString& path);
 
-        Q_INVOKABLE void getNewWallpaper(QQuickItem *ctx = nullptr);
         Q_INVOKABLE void showFileDialog();
 
         Q_INVOKABLE void addUsersWallpaper(const QString &file);

wallpapers/image/imagepackage/contents/ui/config.qml

@@ -25,7 +25,7 @@ import QtQuick.Window 2.0 // for Screen
 import org.kde.plasma.wallpapers.image 2.0 as Wallpaper
 import org.kde.kquickcontrols 2.0 as KQuickControls
 import org.kde.kquickcontrolsaddons 2.0
-import org.kde.kconfig 1.0 // for KAuthorized
+import org.kde.newstuff 1.62 as NewStuff
 import org.kde.draganddrop 2.0 as DragDrop
 import org.kde.kcm 1.1 as KCM
 import org.kde.kirigami 2.5 as Kirigami
@@ -344,12 +344,12 @@ ColumnLayout {
                     text: i18nd("plasma_wallpaper_org.kde.image","Add Folder...")
                     onClicked: imageWallpaper.showAddSlidePathsDialog()
                 }
-                QtControls2.Button {
+                NewStuff.Button {
                     Layout.alignment: Qt.AlignRight
-                    icon.name: "get-hot-new-stuff"
-                    text: i18nd("plasma_wallpaper_org.kde.image","Get New Wallpapers...")
-                    visible: KAuthorized.authorize("ghns")
-                    onClicked: imageWallpaper.getNewWallpaper(this);
+                    configFile: "wallpaper.knsrc"
+                    downloadNewWhat: i18n("Wallpapers")
+                    viewMode: NewStuff.Page.ViewMode.Preview
+                    onChangedEntriesChanged: imageWallpaper.newStuffFinished();
                 }
             }
         }
@@ -443,11 +443,12 @@ ColumnLayout {
             text: i18nd("plasma_wallpaper_org.kde.image","Add Image...")
             onClicked: imageWallpaper.showFileDialog();
         }
-        QtControls2.Button {
-            icon.name: "get-hot-new-stuff"
-            text: i18nd("plasma_wallpaper_org.kde.image","Get New Wallpapers...")
-            visible: KAuthorized.authorize("ghns")
-            onClicked: imageWallpaper.getNewWallpaper(this);
+        NewStuff.Button {
+            Layout.alignment: Qt.AlignRight
+            configFile: "wallpaper.knsrc"
+            downloadNewWhat: i18n("Wallpapers")
+            viewMode: NewStuff.Page.ViewMode.Preview
+            onChangedEntriesChanged: imageWallpaper.newStuffFinished();
         }
     }
 }