Remember last page of settings category

settingsdialog/optioncategory.cpp

@@ -12,7 +12,8 @@ namespace Dialogs {
  * \brief Constructs a option category.
  */
 OptionCategory::OptionCategory(QObject *parent) :
-    QObject(parent)
+    QObject(parent),
+    m_currentIndex(0)
 {}
 
 /*!

settingsdialog/optioncategory.h

@@ -31,6 +31,8 @@ public:
     bool applyAllPages();
     void resetAllPages();
     bool matches(const QString &searchKeyWord) const;
+    int currentIndex() const;
+    void setCurrentIndex(int currentIndex);
     
 Q_SIGNALS:
     void displayNameChanged();
@@ -41,7 +43,7 @@ private:
     QString m_displayName;
     QIcon m_icon;
     QList<OptionPage *> m_pages;
-    
+    int m_currentIndex;
 };
 
 /*!
@@ -86,6 +88,25 @@ inline const QList<OptionPage *> OptionCategory::pages() const
     return m_pages;
 }
 
+/*!
+ * \brief Returns the index of the currently shown page.
+ * \remarks The returned index might be invalid/out of range.
+ * \sa setCurrentIndex()
+ */
+inline int OptionCategory::currentIndex() const
+{
+    return m_currentIndex;
+}
+
+/*!
+ * \brief Sets the current index.
+ * \sa currentIndex()
+ */
+inline void OptionCategory::setCurrentIndex(int currentIndex)
+{
+    m_currentIndex = currentIndex;
+}
+
 }
 
 #endif // DIALOGS_OPTIONSCATEGORY_H

settingsdialog/settingsdialog.cpp

@@ -129,6 +129,9 @@ void SettingsDialog::currentCategoryChanged(const QModelIndex &index)
  */
 void SettingsDialog::showCategory(OptionCategory *category)
 {
+    if(m_currentCategory) {
+        m_currentCategory->setCurrentIndex(m_ui->pagesTabWidget->currentIndex());
+    }
     if(category) {
         if(m_currentCategory != category) {
             m_currentCategory = category;
@@ -168,7 +171,7 @@ void SettingsDialog::updateTabWidget()
     if(m_currentCategory) {
         m_ui->pagesTabWidget->setUpdatesEnabled(false);
         const QString searchKeyWord = m_ui->filterLineEdit->text();
-        int index = 0;
+        int index = 0, pageIndex = 0;
         for(OptionPage *page : m_currentCategory->pages()) {
             if(page->matches(searchKeyWord)) {
                 QScrollArea *scrollArea;
@@ -192,6 +195,10 @@ void SettingsDialog::updateTabWidget()
                 scrollArea->setWidget(page->widget());
                 ++index;
             }
+            if(pageIndex == m_currentCategory->currentIndex()) {
+                m_ui->pagesTabWidget->setCurrentIndex(pageIndex);
+            }
+            ++pageIndex;
         }
         while(index < m_ui->pagesTabWidget->count()) {
             QScrollArea *scrollArea = qobject_cast<QScrollArea *>(m_ui->pagesTabWidget->widget(index));