Make avatar icon dpr aware aka HiDPI rendered

Test Plan: Locally tested under Wayland : couldn't make a screenshot because of https://bugs.kde.org/show_bug.cgi?id=409762

Reviewers: #plasma, ngraham

Reviewed By: ngraham

Subscribers: crossi, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D25395

src/accountinfo.cpp

@@ -47,6 +47,10 @@ AccountInfo::AccountInfo(AccountModel* model, QWidget* parent, Qt::WindowFlags f
 {
     m_info->setupUi(this);
 
+    // ensure avatar user icon use correct device pixel ratio
+    const qreal dpr = qApp->devicePixelRatio();
+    m_model->setDpr(dpr);
+
     connect(m_info->username, &QLineEdit::textEdited, this, &AccountInfo::hasChanged);
     connect(m_info->realName, &QLineEdit::textEdited, this, &AccountInfo::hasChanged);
     connect(m_info->email, &QLineEdit::textEdited, this, &AccountInfo::hasChanged);

src/lib/accountmodel.cpp

@@ -149,7 +149,9 @@ QVariant AccountModel::data(const QModelIndex& index, int role) const
             if (!file.exists()) {
                 return QIcon::fromTheme(QStringLiteral("user-identity")).pixmap(size, size);
             }
-            return QPixmap(file.fileName()).scaled(size, size, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+            auto pixMap = QPixmap(file.fileName()).scaled(static_cast<int>(size * m_dpr), static_cast<int>(size * m_dpr), Qt::KeepAspectRatio, Qt::SmoothTransformation);
+            pixMap.setDevicePixelRatio(m_dpr);
+            return pixMap;
         }
         case AccountModel::RealName:
             return acc->realName();
@@ -539,4 +541,8 @@ QDebug operator<<(QDebug debug, AccountModel::Role role)
     return debug;
 }
 
+void AccountModel::setDpr(qreal dpr) {
+    m_dpr = dpr;
+}
+
 

src/lib/accountmodel.h

@@ -65,6 +65,7 @@ class AccountModel : public QAbstractListModel
         bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole) override;
         bool removeRows(int row, int count, const QModelIndex& parent = QModelIndex()) override;
         bool removeAccountKeepingFiles(int row, bool keepFile = false);
+        void setDpr(qreal dpr);
 
         QVariant newUserData(int role) const;
         bool newUserSetData(const QModelIndex& index, const QVariant& value, int roleInt);
@@ -91,6 +92,7 @@ class AccountModel : public QAbstractListModel
         QHash<QString, bool> m_loggedAccounts;
         KEMailSettings m_kEmailSettings;
         AutomaticLoginSettings m_autoLoginSettings;
+        qreal m_dpr = 1;
 };
 
 QDebug operator<<(QDebug debug, AccountModel::Role role);