[libcalamaresui] Sanitize API of PrettyRadioButton

- Don't expose internals
- Drop unnecessary virtual
- Offer new API to do the things, for which internals were exposed

src/libcalamaresui/widgets/PrettyRadioButton.cpp

@@ -21,6 +21,7 @@
 #include "utils/CalamaresUtilsGui.h"
 #include "widgets/ClickableLabel.h"
 
+#include <QButtonGroup>
 #include <QComboBox>
 #include <QGridLayout>
 #include <QHBoxLayout>
@@ -80,12 +81,26 @@ PrettyRadioButton::iconSize() const
 }
 
 
-QRadioButton*
-PrettyRadioButton::buttonWidget() const
+void
+PrettyRadioButton::setChecked( bool checked )
+{
+    m_radio->setChecked( checked );
+}
+
+
+bool
+PrettyRadioButton::isChecked() const
 {
-    return m_radio;
+    return m_radio->isChecked();
 }
 
+void
+PrettyRadioButton::addToGroup( QButtonGroup* group, int id )
+{
+    group->addButton( m_radio, id );
+}
+
+
 void
 PrettyRadioButton::addOptionsComboBox( QComboBox* box )
 {

src/libcalamaresui/widgets/PrettyRadioButton.h

@@ -23,6 +23,7 @@
 
 #include <QRadioButton>
 
+class QButtonGroup;
 class QComboBox;
 class QGridLayout;
 class QHBoxLayout;
@@ -32,6 +33,9 @@ namespace Calamares
 class ClickableLabel;
 
 /** @brief A radio button with fancy label next to it.
+ *
+ * The fancy label is used so that the text alongside the radio
+ * button can word-wrap, be multi-line, and support rich text.
  *
  * The radio button itself can be retrieved with buttonWidget(),
  * and the whole behaves a lot like a label. Extra options can be
@@ -45,17 +49,26 @@ public:
     explicit PrettyRadioButton( QWidget* parent = nullptr );
     virtual ~PrettyRadioButton() { }
 
-    virtual void setText( const QString& text );
-
-    virtual void setIconSize( const QSize& size );
+    /// @brief Passes @p text on to the ClickableLabel
+    void setText( const QString& text );
 
-    virtual void setIcon( const QIcon& icon );
+    // Icon applies to the radio-button part
+    void setIconSize( const QSize& size );
+    QSize iconSize() const;
+    void setIcon( const QIcon& icon );
 
-    virtual QSize iconSize() const;
+    // Applies to the radio-button part
+    void setChecked( bool checked );
+    bool isChecked() const;
 
-    virtual QRadioButton* buttonWidget() const;
+    /** @brief Adds the radio-button part to the given @p group
+     *
+     * For managing the pretty-radio-button in button groups like normal
+     * radio buttons, call addToGroup() rather that group->addButton().
+     */
+    void addToGroup( QButtonGroup* group, int id = -1 );
 
-    /** @brief Add an options drop-down to this button. */
+    /// @brief Add an options drop-down to this button.
     void addOptionsComboBox( QComboBox* );
 
 protected slots: