Improved HexViewerWidget performance

src/Insight/UserInterfaces/InsightWindow/Widgets/TargetMemoryInspectionPane/HexViewerWidget/ByteAddressContainer.cpp

@@ -13,34 +13,30 @@ namespace Bloom::Widgets
             const auto rowIndex = static_cast<std::size_t>(mappingPair.first);
             const auto& byteItems = mappingPair.second;
 
-            if (byteItems.empty()) {
-                continue;
-            }
-
             ByteAddressItem* addressLabel = nullptr;
             if (static_cast<int>(rowIndex) > layoutItemMaxIndex) {
-                addressLabel = new ByteAddressItem(this);
-                this->addressItemsByRowIndex.insert(std::pair(rowIndex, addressLabel));
+                addressLabel = new ByteAddressItem(rowIndex, byteItemsByRowIndex, this);
+                this->addressItemsByRowIndex.emplace(rowIndex, addressLabel);
 
             } else {
                 addressLabel = this->addressItemsByRowIndex.at(rowIndex);
+                addressLabel->update();
+                addressLabel->setVisible(true);
             }
 
             const auto& firstByteItem = byteItems.front();
-            addressLabel->setAddressHex(firstByteItem->relativeAddressHex);
             addressLabel->setPos(
                 leftMargin,
                 firstByteItem->pos().y() + 3 // +3 to have the address item and byte item align vertically, from center
             );
         }
 
-        // Delete any address items we no longer need
+        // Hide any address items we no longer need
         const auto addressItemCount = this->addressItemsByRowIndex.size();
 
         if (newRowCount > 0 && newRowCount < addressItemCount) {
             for (auto i = (addressItemCount - 1); i >= newRowCount; i--) {
-                delete this->addressItemsByRowIndex.at(i);
-                this->addressItemsByRowIndex.erase(i);
+                this->addressItemsByRowIndex.at(i)->setVisible(false);
             }
         }
 

src/Insight/UserInterfaces/InsightWindow/Widgets/TargetMemoryInspectionPane/HexViewerWidget/ByteAddressItem.cpp

@@ -4,12 +4,19 @@
 
 namespace Bloom::Widgets
 {
-    void ByteAddressItem::setAddressHex(const QString& addressHex) {
+    ByteAddressItem::ByteAddressItem(
+        std::size_t rowIndex,
+        const std::map<std::size_t, std::vector<ByteItem*>>& byteItemsByRowIndex,
+        QGraphicsItem* parent
+    )
+        : rowIndex(rowIndex)
+        , byteItemsByRowIndex(byteItemsByRowIndex)
+        , QGraphicsItem(parent)
+    {
         this->setCacheMode(
             QGraphicsItem::CacheMode::ItemCoordinateCache,
             QSize(ByteAddressItem::WIDTH, ByteAddressItem::HEIGHT)
         );
-        this->addressHex = addressHex;
     }
 
     void ByteAddressItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) {
@@ -26,6 +33,10 @@ namespace Bloom::Widgets
 
         painter->setFont(font);
         painter->setPen(fontColor);
-        painter->drawText(widgetRect, Qt::AlignLeft, this->addressHex);
+        painter->drawText(
+            widgetRect,
+            Qt::AlignLeft,
+            this->byteItemsByRowIndex.at(this->rowIndex)[0]->relativeAddressHex
+        );
     }
 }

src/Insight/UserInterfaces/InsightWindow/Widgets/TargetMemoryInspectionPane/HexViewerWidget/ByteAddressItem.hpp

@@ -1,9 +1,8 @@
 #pragma once
 
 #include <cstdint>
-#include <QEvent>
 #include <QGraphicsItem>
-#include <optional>
+#include <map>
 
 #include "ByteItem.hpp"
 
@@ -15,9 +14,13 @@ namespace Bloom::Widgets
         static constexpr int WIDTH = 75;
         static constexpr int HEIGHT = ByteItem::HEIGHT;
 
-        explicit ByteAddressItem(QGraphicsItem* parent): QGraphicsItem(parent) {};
+        std::size_t rowIndex = 0;
 
-        void setAddressHex(const QString& address);
+        explicit ByteAddressItem(
+            std::size_t rowIndex,
+            const std::map<std::size_t, std::vector<ByteItem*>>& byteItemsByRowIndex,
+            QGraphicsItem* parent
+        );
 
         [[nodiscard]] QRectF boundingRect() const override {
             return {
@@ -31,6 +34,6 @@ namespace Bloom::Widgets
         void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) override;
 
     private:
-        QString addressHex;
+        const std::map<std::size_t, std::vector<ByteItem*>>& byteItemsByRowIndex;
     };
 }

src/Insight/UserInterfaces/InsightWindow/Widgets/TargetMemoryInspectionPane/HexViewerWidget/ByteItem.cpp

@@ -22,9 +22,11 @@ namespace Bloom::Widgets
         , highlightedByteItems(highlightedByteItems)
         , settings(settings)
     {
+        static const auto cacheResolution = QSize(ByteItem::WIDTH, ByteItem::HEIGHT);
+
         this->setCacheMode(
             QGraphicsItem::CacheMode::ItemCoordinateCache,
-            QSize(ByteItem::WIDTH, ByteItem::HEIGHT)
+            cacheResolution
         );
         this->setAcceptHoverEvents(true);
 

src/Insight/UserInterfaces/InsightWindow/Widgets/TargetMemoryInspectionPane/HexViewerWidget/ByteItemContainerGraphicsView.cpp

@@ -16,6 +16,9 @@ namespace Bloom::Widgets
         this->setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy::ScrollBarAlwaysOff);
         this->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
         this->setViewportUpdateMode(QGraphicsView::MinimalViewportUpdate);
+        this->setOptimizationFlag(QGraphicsView::DontSavePainterState, true);
+        this->setOptimizationFlag(QGraphicsView::DontAdjustForAntialiasing, true);
+        this->setCacheMode(QGraphicsView::CacheBackground);
     }
 
     void ByteItemContainerGraphicsView::initScene(

src/Insight/UserInterfaces/InsightWindow/Widgets/TargetMemoryInspectionPane/HexViewerWidget/ByteItemGraphicsScene.cpp

@@ -44,7 +44,7 @@ namespace Bloom::Widgets
                 settings
             );
 
-            this->byteItemsByAddress.insert(std::pair(
+            this->byteItemsByAddress.emplace(std::pair(
                 address,
                 byteWidget
             ));