CppTools: Clean up CppCodeModelSettingsWidget

Change-Id: Iee93d2d656a8a5c991b292d3e591cedd3e86f9e3
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>

src/plugins/cpptools/cppcodemodelsettingspage.cpp

@@ -64,23 +64,15 @@ void CppCodeModelSettingsWidget::setSettings(const QSharedPointer<CppCodeModelSe
     m_settings = s;
 
     setupClangCodeModelWidgets();
-    m_ui->ignorePCHCheckBox->setChecked(s->pchUsage() == CppCodeModelSettings::PchUse_None);
+    setupPchCheckBox();
 }
 
 void CppCodeModelSettingsWidget::applyToSettings() const
 {
     bool changed = false;
 
-    if (applyClangCodeModelWidgetsToSettings())
-        changed = true;
-
-    if (m_ui->ignorePCHCheckBox->isChecked() !=
-            (m_settings->pchUsage() == CppCodeModelSettings::PchUse_None)) {
-        m_settings->setPCHUsage(
-                   m_ui->ignorePCHCheckBox->isChecked() ? CppCodeModelSettings::PchUse_None
-                                                        : CppCodeModelSettings::PchUse_BuildSystem);
-        changed = true;
-    }
+    changed |= applyClangCodeModelWidgetsToSettings();
+    changed |= applyPchCheckBoxToSettings();
 
     if (changed)
         m_settings->toSettings(Core::ICore::settings());
@@ -101,6 +93,12 @@ void CppCodeModelSettingsWidget::setupClangCodeModelWidgets() const
     m_ui->clangOptionsToAppendTextEdit->document()->setPlainText(extraClangOptions);
 }
 
+void CppCodeModelSettingsWidget::setupPchCheckBox() const
+{
+    const bool ignorePch = m_settings->pchUsage() == CppCodeModelSettings::PchUse_None;
+    m_ui->ignorePCHCheckBox->setChecked(ignorePch);
+}
+
 bool CppCodeModelSettingsWidget::applyClangCodeModelWidgetsToSettings() const
 {
     bool settingsChanged = false;
@@ -124,6 +122,23 @@ bool CppCodeModelSettingsWidget::applyClangCodeModelWidgetsToSettings() const
     return settingsChanged;
 }
 
+bool CppCodeModelSettingsWidget::applyPchCheckBoxToSettings() const
+{
+    const bool newIgnorePch = m_ui->ignorePCHCheckBox->isChecked();
+    const bool previousIgnorePch = m_settings->pchUsage() == CppCodeModelSettings::PchUse_None;
+
+    if (newIgnorePch != previousIgnorePch) {
+        const CppCodeModelSettings::PCHUsage pchUsage = m_ui->ignorePCHCheckBox->isChecked()
+                ? CppCodeModelSettings::PchUse_None
+                : CppCodeModelSettings::PchUse_BuildSystem;
+        m_settings->setPCHUsage(pchUsage);
+
+        return true;
+    }
+
+    return false;
+}
+
 CppCodeModelSettingsPage::CppCodeModelSettingsPage(QSharedPointer<CppCodeModelSettings> &settings,
                                                    QObject *parent)
     : Core::IOptionsPage(parent)

src/plugins/cpptools/cppcodemodelsettingspage.h

@@ -59,7 +59,10 @@ public:
 
 private:
     void setupClangCodeModelWidgets() const;
+    void setupPchCheckBox() const;
+
     bool applyClangCodeModelWidgetsToSettings() const;
+    bool applyPchCheckBoxToSettings() const;
 
 private:
     Ui::CppCodeModelSettingsPage *m_ui;