refactor: Make few methods ConstDialog const

src/widget/contentdialog.cpp

@@ -276,12 +276,12 @@ void ContentDialog::removeGroup(int groupId)
     }
 }
 
-bool ContentDialog::hasFriendWidget(int friendId, GenericChatroomWidget* chatroomWidget)
+bool ContentDialog::hasFriendWidget(int friendId, const GenericChatroomWidget* chatroomWidget) const
 {
     return hasWidget(friendId, chatroomWidget, friendList);
 }
 
-bool ContentDialog::hasGroupWidget(int groupId, GenericChatroomWidget* chatroomWidget)
+bool ContentDialog::hasGroupWidget(int groupId, const GenericChatroomWidget* chatroomWidget) const
 {
     return hasWidget(groupId, chatroomWidget, groupList);
 }
@@ -811,8 +811,8 @@ void ContentDialog::saveSplitterState()
  * @param list List with contact info.
  * @return True, if chatroomWidget is pair for current instance.
  */
-bool ContentDialog::hasWidget(int id, GenericChatroomWidget* chatroomWidget,
-                              const QHash<int, ContactInfo>& list)
+bool ContentDialog::hasWidget(int id, const GenericChatroomWidget* chatroomWidget,
+                              const QHash<int, ContactInfo>& list) const
 {
     auto iter = list.find(id);
     if (iter == list.end()) {

src/widget/contentdialog.h

@@ -56,8 +56,8 @@ public:
     GroupWidget* addGroup(int groupId, const QString& name);
     void removeFriend(int friendId);
     void removeGroup(int groupId);
-    bool hasFriendWidget(int friendId, GenericChatroomWidget* chatroomWidget);
-    bool hasGroupWidget(int groupId, GenericChatroomWidget* chatroomWidget);
+    bool hasFriendWidget(int friendId, const GenericChatroomWidget* chatroomWidget) const;
+    bool hasGroupWidget(int groupId, const GenericChatroomWidget* chatroomWidget) const;
     int chatroomWidgetCount() const;
     void ensureSplitterVisible();
     void updateTitleAndStatusIcon();
@@ -113,7 +113,8 @@ private:
     QLayout* nextLayout(QLayout* layout, bool forward) const;
     int getCurrentLayout(QLayout*& layout);
 
-    bool hasWidget(int id, GenericChatroomWidget* chatroomWidget, const QHash<int, ContactInfo>& list);
+    bool hasWidget(int id, const GenericChatroomWidget* chatroomWidget,
+                   const QHash<int, ContactInfo>& list) const;
     void removeCurrent(QHash<int, ContactInfo>& infos);
     static bool existsWidget(int id, const QHash<int, ContactInfo>& list);
     static void focusDialog(int id, const QHash<int, ContactInfo>& list);