From: Marcus Eggenberger <egs@quassel-irc.org>
Date: Mon, 27 Oct 2008 12:58:16 +0000 (+0100)
Subject: fixing a crash if there are no visible messages in a chatscene
X-Git-Tag: 0.3.1~121
X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=commitdiff_plain;h=954b1a6f53da55f9713fb4e75a2fb46dae7d9df8

fixing a crash if there are no visible messages in a chatscene
---

diff --git a/src/qtui/chatscene.cpp b/src/qtui/chatscene.cpp
index f71c8572..c24933a2 100644
--- a/src/qtui/chatscene.cpp
+++ b/src/qtui/chatscene.cpp
@@ -573,9 +573,14 @@ void ChatScene::updateSceneRect(qreal width) {
   }
 
   // the following call should be safe. If it crashes something went wrong during insert/remove
-  ChatLine *firstLine = _lines.at(_firstLineRow);
-  ChatLine *lastLine = _lines.last();
-  updateSceneRect(QRectF(0, firstLine->pos().y(), width, lastLine->pos().y() + lastLine->height() - firstLine->pos().y()));
+  if(_firstLineRow < _lines.count()) {
+    ChatLine *firstLine = _lines.at(_firstLineRow);
+    ChatLine *lastLine = _lines.last();
+    updateSceneRect(QRectF(0, firstLine->pos().y(), width, lastLine->pos().y() + lastLine->height() - firstLine->pos().y()));
+  } else {
+    // empty scene rect
+    updateSceneRect(QRectF(0, 0, width, 0));
+  }
 }
 
 void ChatScene::updateSceneRect(const QRectF &rect) {