optimized ChatLog::getContentFromPos

src/chatlog/chatline.cpp

@@ -72,6 +72,17 @@ ChatLineContent *ChatLine::getContent(int col) const
     return nullptr;
 }
 
+ChatLineContent *ChatLine::getContent(QPointF scenePos) const
+{
+    for(ChatLineContent* c: content)
+    {
+        if(c->sceneBoundingRect().contains(scenePos))
+            return c;
+    }
+
+    return nullptr;
+}
+
 void ChatLine::removeFromScene()
 {
     for(ChatLineContent* c : content)

src/chatlog/chatline.h

@@ -76,6 +76,7 @@ public:
     int getColumnCount();
     int getRowIndex() const;
     ChatLineContent* getContent(int col) const;
+    ChatLineContent* getContent(QPointF scenePos) const;
 
     bool isOverSelection(QPointF scenePos);
 

src/chatlog/chatlog.cpp

@@ -284,10 +284,26 @@ void ChatLog::mouseMoveEvent(QMouseEvent* ev)
 
 ChatLineContent* ChatLog::getContentFromPos(QPointF scenePos) const
 {
-    QGraphicsItem* item = scene->itemAt(scenePos, QTransform());
+    if(lines.empty())
+        return nullptr;
+
+    QList<ChatLine::Ptr>::const_iterator upperBound;
+    upperBound = std::upper_bound(lines.cbegin(), lines.cend(), scenePos.y(), [](const qreal lhs, const ChatLine::Ptr rhs)
+    {
+        return lhs < rhs->boundingSceneRect().bottom();
+    });
+
+    QList<ChatLine::Ptr>::const_iterator lowerBound;
+    lowerBound = std::lower_bound(lines.cbegin(), lines.cend(), scenePos.y(), [](const ChatLine::Ptr lhs, const qreal rhs)
+    {
+        return lhs->boundingSceneRect().top() < rhs;
+    });
 
-    if(item && item->type() == ChatLineContent::ChatLineContentType)
-        return static_cast<ChatLineContent*>(item);
+    for(auto itr = upperBound; itr != lowerBound; ++itr)
+    {
+        if((*itr)->boundingSceneRect().contains(scenePos))
+            return (*itr)->getContent(scenePos);
+    }
 
     return nullptr;
 }