[welcome] Very basic model delegate for results / requirements

src/modules/welcome/CMakeLists.txt

@@ -21,6 +21,7 @@ calamares_add_plugin(welcome
     SOURCES
         checker/CheckerContainer.cpp
         checker/GeneralRequirements.cpp
+        checker/ResultDelegate.cpp
         checker/ResultWidget.cpp
         checker/ResultsListWidget.cpp
         ${PARTMAN_SRC}

src/modules/welcome/checker/ResultDelegate.cpp

@@ -0,0 +1,88 @@
+/* === This file is part of Calamares - <https://calamares.io> ===
+ *
+ *   SPDX-FileCopyrightText: 2022 Adriaan de Groot <groot@kde.org>
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   Calamares is Free Software: see the License-Identifier above.
+ *
+ */
+
+#include "ResultDelegate.h"
+
+#include "modulesystem/RequirementsModel.h"
+#include "utils/CalamaresUtilsGui.h"
+
+#include <QApplication>
+#include <QPainter>
+
+static constexpr int const item_margin = 8;
+static inline int
+item_fontsize()
+{
+    return CalamaresUtils::defaultFontSize() + 4;
+}
+
+static void
+paintRequirement( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index )
+{
+    QRect textRect = option.rect.adjusted( item_margin, item_margin, -item_margin, -item_margin );
+    QFont font = qApp->font();
+    font.setPointSize( item_fontsize() );
+    font.setBold( false );
+    painter->setFont( font );
+
+    if ( index.data( Calamares::RequirementsModel::Satisfied ).toBool() )
+    {
+        painter->setBrush( QColorConstants::Green );
+        painter->setPen( QColorConstants::Black );
+    }
+    else
+    {
+        if ( index.data( Calamares::RequirementsModel::Mandatory ).toBool() )
+        {
+            painter->setPen( QColorConstants::Red );
+        }
+        else
+        {
+            painter->setPen( QColorConstants::Blue );
+        }
+    }
+
+
+    painter->drawText( textRect, Qt::AlignLeft | Qt::AlignVCenter | Qt::TextSingleLine, index.data().toString() );
+}
+
+QSize
+ResultDelegate::sizeHint( const QStyleOptionViewItem& option, const QModelIndex& index ) const
+{
+    if ( !index.isValid() )
+    {
+        return option.rect.size();
+    }
+
+    QFont font = qApp->font();
+
+    font.setPointSize( item_fontsize() );
+    QFontMetrics fm( font );
+    int height = fm.height();
+
+    height += 2 * item_margin;
+
+    return QSize( option.rect.width(), height );
+}
+
+
+void
+ResultDelegate::paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const
+{
+    QStyleOptionViewItem opt = option;
+
+    painter->save();
+
+    initStyleOption( &opt, index );
+    opt.text.clear();
+
+    paintRequirement( painter, opt, index );
+
+    painter->restore();
+}

src/modules/welcome/checker/ResultDelegate.h

@@ -0,0 +1,28 @@
+/* === This file is part of Calamares - <https://calamares.io> ===
+ *
+ *   SPDX-FileCopyrightText: 2022 Adriaan de Groot <groot@kde.org>
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   Calamares is Free Software: see the License-Identifier above.
+ *
+ */
+
+#ifndef WELCOME_CHECKER_RESULTDELEGATE_HH
+#define WELCOME_CHECKER_RESULTDELEGATE_HH
+
+#include <QStyledItemDelegate>
+
+/**
+ * @brief Class for drawing (un)satisfied requirements
+ */
+class ResultDelegate : public QStyledItemDelegate
+{
+public:
+    using QStyledItemDelegate::QStyledItemDelegate;
+
+protected:
+    QSize sizeHint( const QStyleOptionViewItem& option, const QModelIndex& index ) const override;
+    void paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const override;
+};
+
+#endif  // PROGRESSTREEDELEGATE_H