Ref T111, allow to limit entries in log component

src/blackgui/components/logcomponent.cpp

@@ -102,6 +102,11 @@ namespace BlackGui
             ui->tep_StatusPageConsole->clear();
         }
 
+        int CLogComponent::rowCount() const
+        {
+            return ui->tvp_StatusMessages->rowCount();
+        }
+
         void CLogComponent::appendStatusMessageToConsole(const CStatusMessage &statusMessage)
         {
             if (statusMessage.isEmpty()) return;
@@ -117,12 +122,14 @@ namespace BlackGui
         {
             if (statusMessage.isEmpty()) { return; }
             ui->tvp_StatusMessages->insert(statusMessage);
+            this->removeOldest();
         }
 
         void CLogComponent::appendStatusMessagesToList(const CStatusMessageList &statusMessages)
         {
             if (statusMessages.isEmpty()) { return; }
             ui->tvp_StatusMessages->insert(statusMessages);
+            this->removeOldest();
         }
 
         void CLogComponent::onStatusMessageDataChanged(int count, bool withFilter)
@@ -136,6 +143,20 @@ namespace BlackGui
             ui->tw_StatusPage->setTabText(i, o);
         }
 
+        void CLogComponent::removeOldest()
+        {
+            // do not remove every time, but when a threshold is reached
+            if (m_maxLogMessages < 1) { return; }
+            if (m_maxLogMessages < 100 && ui->tvp_StatusMessages->rowCount() > (m_maxLogMessages + 10))
+            {
+                ui->tvp_StatusMessages->keepLatest(m_maxLogMessages);
+            }
+            else if (ui->tvp_StatusMessages->rowCount() > (m_maxLogMessages * 1.1))
+            {
+                ui->tvp_StatusMessages->keepLatest(m_maxLogMessages);
+            }
+        }
+
         void CLogComponent::CLogMenu::customMenu(CMenuActions &menuActions)
         {
             CLogComponent *logComp = qobject_cast<CLogComponent *>(this->parent());

src/blackgui/components/logcomponent.h

@@ -48,8 +48,7 @@ namespace BlackGui
         };
 
         //! GUI displaying log and status messages
-        class BLACKGUI_EXPORT CLogComponent :
-            public QFrame
+        class BLACKGUI_EXPORT CLogComponent : public QFrame
         {
             Q_OBJECT
 
@@ -75,12 +74,18 @@ namespace BlackGui
             //! Show a filter bar
             void showFilterBar();
 
-            //! Set fi
+            //! Set descriptive icons
             void filterUseRadioButtonDescriptiveIcons(bool oneLetterText);
 
             //! Clear
             void clear();
 
+            //! Number of status messages in log view
+            int rowCount() const;
+
+            //! Set max.log messages
+            void setMaxLogMessages(int desiredNumber) { m_maxLogMessages = desiredNumber; }
+
         signals:
             //! Make me visible
             void requestAttention();
@@ -100,10 +105,14 @@ namespace BlackGui
 
         private:
             QScopedPointer<Ui::CLogComponent> ui;
+            int m_maxLogMessages = -1;
 
             //! Status messages changed
             void onStatusMessageDataChanged(int count, bool withFilter);
 
+            //! Remove oldest messages
+            void removeOldest();
+
             //! Custom menu for the log component
             class CLogMenu : public BlackGui::Menus::IMenuDelegate
             {

src/blackgui/views/statusmessageview.cpp

@@ -39,6 +39,20 @@ namespace BlackGui
             this->setFilterDialog(new CStatusMessageFilterDialog(this));
         }
 
+        void CStatusMessageView::keepLatest(int desiredSize)
+        {
+            if (desiredSize >= this->rowCount()) { return; }
+            if (desiredSize < 1)
+            {
+                this->clear();
+                return;
+            }
+
+            CStatusMessageList msgs = this->container();
+            msgs.keepLatest(desiredSize);
+            this->updateContainerMaybeAsync(msgs);
+        }
+
         CStatusMessageFilterDialog *CStatusMessageView::getFilterDialog() const
         {
             return qobject_cast<CStatusMessageFilterDialog *>(this->getFilterWidget());

src/blackgui/views/statusmessageview.h

@@ -43,6 +43,9 @@ namespace BlackGui
             //! Add my own filter dialog
             void addFilterDialog();
 
+            //! \copydoc BlackMisc::CStatusMessageList::keepLatest
+            void keepLatest(int desiredSize);
+
             //! Filter dialog if any
             BlackGui::Filters::CStatusMessageFilterDialog *getFilterDialog() const;
         };

src/blackmisc/statusmessagelist.cpp

@@ -139,6 +139,25 @@ namespace BlackMisc
         this->removeIf(&CStatusMessage::getSeverity, CStatusMessage::SeverityInfo);
     }
 
+    int CStatusMessageList::keepLatest(int estimtatedNumber)
+    {
+        const int oldSize = this->size();
+        if (estimtatedNumber >= oldSize) { return 0; }
+        if (estimtatedNumber < 1)
+        {
+            this->clear();
+            return oldSize;
+        }
+
+        CStatusMessageList copy(*this);
+        copy.sortLatestFirst();
+        const QDateTime ts = copy[estimtatedNumber - 1].getUtcTimestamp();
+        copy = *this; // keep order
+        copy.removeBefore(ts);
+        *this = copy;
+        return oldSize - this->size();
+    }
+
     CStatusMessage::StatusSeverity CStatusMessageList::worstSeverity() const
     {
         CStatusMessage::StatusSeverity s = CStatusMessage::SeverityDebug;

src/blackmisc/statusmessagelist.h

@@ -97,6 +97,10 @@ namespace BlackMisc
         //! Remove info and below
         void removeInfoAndBelow();
 
+        //! Keep latest n status messages
+        //! \remark taking timestamp of n-th oldest messages, deleting all older
+        int keepLatest(int estimtatedNumber);
+
         //! Find worst severity
         CStatusMessage::StatusSeverity worstSeverity() const;