From c40585750e9aa4aac5621a5277911972f4959dbd Mon Sep 17 00:00:00 2001
From: Vladyslav Goncharuk <vladyslav_goncharuk@epam.com>
Date: Fri, 31 May 2024 18:20:55 +0300
Subject: [PATCH] [ISSUE #190][PLOT_VIEW] Undo filtering with "F" doesn`t work

This patch extends the logic of filtering of the selected plot.

Signed-off-by: Vladyslav Goncharuk <vladyslav_goncharuk@epam.com>
---
 .../plotView/src/CCustomPlotExtended.cpp      | 90 ++++++++++---------
 1 file changed, 47 insertions(+), 43 deletions(-)

diff --git a/dltmessageanalyzerplugin/src/components/plotView/src/CCustomPlotExtended.cpp b/dltmessageanalyzerplugin/src/components/plotView/src/CCustomPlotExtended.cpp
index 11c6d98e..7db43429 100644
--- a/dltmessageanalyzerplugin/src/components/plotView/src/CCustomPlotExtended.cpp
+++ b/dltmessageanalyzerplugin/src/components/plotView/src/CCustomPlotExtended.cpp
@@ -498,19 +498,22 @@ std::pair<bool, ePlotViewAxisType> CCustomPlotExtended::getAxisRectType(QCPAxisR
 
 void CCustomPlotExtended::filterGraphBySelectedItem()
 {
-    int numberOfVisibleGraphs = 0;
-    QCPPlottableLegendItem* pSelectedLegendItem = nullptr;
-    const QCPLegend* pSelectedLegend = nullptr;
+    bool bReplot = false;
+    bool isSelectedItemAvailable =false;
 
     for(const auto& axisRectPair : mPlotAxisRectDataMap)
     {
-        bool leaveCycle = false;
+        QCPPlottableLegendItem* pSelectedLegendItem = nullptr;
+        int numberOfVisibleGraphs = 0;
+        int numberOfGraphs = 0;
 
         const auto* pLegend = axisRectPair.second.pLegend;
 
         if(nullptr != pLegend)
         {
-            for (int i = 0; i < pLegend->itemCount(); ++i)
+            numberOfGraphs = pLegend->itemCount();
+
+            for (int i = 0; i < numberOfGraphs; ++i)
             {
                 QCPPlottableLegendItem* pItem = qobject_cast<QCPPlottableLegendItem*>(pLegend->item(i));
                 if (nullptr != pItem)
@@ -520,69 +523,69 @@ void CCustomPlotExtended::filterGraphBySelectedItem()
                         ++numberOfVisibleGraphs;
                     }
 
-                    if(nullptr == pSelectedLegendItem || nullptr == pSelectedLegend)
+                    if(nullptr == pSelectedLegendItem)
                     {
                         if(false == pItem->plottable()->selection().isEmpty())
                         {
                             pSelectedLegendItem = pItem;
-                            pSelectedLegend = pLegend;
+                            isSelectedItemAvailable = true;
                         }
                     }
-
-                    if(numberOfVisibleGraphs > 1 &&
-                       nullptr != pSelectedLegendItem &&
-                       nullptr != pSelectedLegend)
-                    {
-                        leaveCycle = true;
-                        break;
-                    }
                 }
             }
 
-            if(true == leaveCycle)
+            enum class eAction
             {
-                break;
-            }
-        }
-    }
+                eApplyFiltrer,
+                eRemoveFiltrer,
+                eDoNothing
+            };
 
-    bool bReplot = false;
+            eAction action = eAction::eDoNothing;
 
-    if(nullptr != pSelectedLegend)
-    {
-        bool bFilterOut = numberOfVisibleGraphs > 1;
+            if(numberOfGraphs != numberOfVisibleGraphs && numberOfVisibleGraphs > 1 && nullptr == pSelectedLegendItem)
+                action = eAction::eDoNothing;
+            else if(numberOfVisibleGraphs > 1 && numberOfVisibleGraphs > 1 && nullptr != pSelectedLegendItem)
+                action = eAction::eApplyFiltrer;
+            else if(numberOfGraphs > 1 && numberOfVisibleGraphs == 1 && nullptr != pSelectedLegendItem)
+                action = eAction::eRemoveFiltrer;
 
-        for (int i = 0; i < pSelectedLegend->itemCount(); ++i)
-        {
-            QCPPlottableLegendItem* pItem = qobject_cast<QCPPlottableLegendItem*>(pSelectedLegend->item(i));
-
-            if(nullptr != pItem)
+            for (int i = 0; i < pLegend->itemCount(); ++i)
             {
-                if(true == bFilterOut)
-                {
-                    if(true == pItem->plottable()->visible() && pItem != pSelectedLegendItem)
-                    {
-                        changeLegendItemVisibility(pItem);
-                        bReplot = true;
-                    }
-                }
-                else
+                QCPPlottableLegendItem* pItem = qobject_cast<QCPPlottableLegendItem*>(pLegend->item(i));
+
+                if(nullptr != pItem)
                 {
-                    if(false == pItem->plottable()->visible())
+                    switch(action)
                     {
-                        changeLegendItemVisibility(pItem);
-                        bReplot = true;
+                    case eAction::eApplyFiltrer:
+                        if(true == pItem->plottable()->visible() && pItem != pSelectedLegendItem)
+                        {
+                            changeLegendItemVisibility(pItem);
+                            bReplot = true;
+                        }
+                        break;
+                    case eAction::eRemoveFiltrer:
+                        if(false == pItem->plottable()->visible())
+                        {
+                            changeLegendItemVisibility(pItem);
+                            bReplot = true;
+                        }
+                        break;
+                    case eAction::eDoNothing:
+                        // do nothing
+                        break;
                     }
                 }
             }
         }
     }
-    else
+
+    if(false == isSelectedItemAvailable)
     {
         for(const auto& axisRectPair : mPlotAxisRectDataMap)
         {
             const auto* pLegend = axisRectPair.second.pLegend;
-
             if(nullptr != pLegend)
             {
                 for (int i = 0; i < pLegend->itemCount(); ++i)
@@ -599,6 +602,7 @@ void CCustomPlotExtended::filterGraphBySelectedItem()
                 }
             }
         }
+
     }
 
     if(true == bReplot)