From 514e28135038076a91d3b4853b41b258551bd196 Mon Sep 17 00:00:00 2001
From: Marcus Eggenberger <egs@quassel-irc.org>
Date: Wed, 15 Oct 2008 01:28:05 +0200
Subject: [PATCH] Finally fixing the WebPreview crash bug. As a result
 BspTreeIndexing has been reenabled. Also the WebPreview is now cached, so if
 you hover out and hover in in less then 10 minutes, the webview will not be
 reloaded.

---
 src/qtui/chatscene.cpp      | 31 +++++++++++++++++--------------
 src/qtui/chatscene.h        |  6 +++---
 src/qtui/webpreviewitem.cpp |  4 ----
 3 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/src/qtui/chatscene.cpp b/src/qtui/chatscene.cpp
index 49bb89f4..d02bfc64 100644
--- a/src/qtui/chatscene.cpp
+++ b/src/qtui/chatscene.cpp
@@ -94,9 +94,8 @@ ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal w
 
   webPreview.delayTimer.setSingleShot(true);
   connect(&webPreview.delayTimer, SIGNAL(timeout()), this, SLOT(showWebPreview()));
-
-  // installEventFilter(this);
-  setItemIndexMethod(QGraphicsScene::NoIndex);
+  webPreview.deleteTimer.setInterval(600000);
+  connect(&webPreview.deleteTimer, SIGNAL(timeout()), this, SLOT(deleteWebPreview()));
 }
 
 ChatScene::~ChatScene() {
@@ -591,12 +590,17 @@ void ChatScene::loadWebPreview(ChatItem *parentItem, const QString &url, const Q
   if(webPreview.url != url) {
     webPreview.url = url;
     // load a new web view and delete the old one (if exists)
-    if(webPreview.previewItem) {
+    if(webPreview.previewItem && webPreview.previewItem->scene()) {
       removeItem(webPreview.previewItem);
       delete webPreview.previewItem;
     }
     webPreview.previewItem = new WebPreviewItem(url);
     webPreview.delayTimer.start(2000);
+    webPreview.deleteTimer.stop();
+  } else if(webPreview.previewItem && !webPreview.previewItem->scene()) {
+      // we just have to readd the item to the scene
+      webPreview.delayTimer.start(2000);
+      webPreview.deleteTimer.stop();
   }
   if(webPreview.urlRect != urlRect) {
     webPreview.urlRect = urlRect;
@@ -635,21 +639,20 @@ void ChatScene::showWebPreview() {
 void ChatScene::clearWebPreviewEvent(ClearWebPreviewEvent *event) {
 #ifdef HAVE_WEBKIT
   event->accept();
+  if(webPreview.previewItem && webPreview.previewItem->scene()) {
+    removeItem(webPreview.previewItem);
+    webPreview.deleteTimer.start();
+  }
+  webPreview.delayTimer.stop();
+#endif
+}
+
+void ChatScene::deleteWebPreview() {
   if(webPreview.previewItem) {
-    if(webPreview.previewItem->scene()) {
-      removeItem(webPreview.previewItem);
-    }
     delete webPreview.previewItem;
     webPreview.previewItem = 0;
   }
   webPreview.parentItem = 0;
   webPreview.url = QString();
   webPreview.urlRect = QRectF();
-#endif
 }
-
-bool ChatScene::eventFilter(QObject *watched, QEvent *event) {
-  qDebug() << watched << event;
-  return false;
-}
-
diff --git a/src/qtui/chatscene.h b/src/qtui/chatscene.h
index 2204d667..637dfe11 100644
--- a/src/qtui/chatscene.h
+++ b/src/qtui/chatscene.h
@@ -59,8 +59,6 @@ public:
   inline ColumnHandleItem *firstColumnHandle() const { return firstColHandle; }
   inline ColumnHandleItem *secondColumnHandle() const { return secondColHandle; }
 
-  virtual bool eventFilter(QObject *watched, QEvent *event);
-
 public slots:
   void updateForViewport(qreal width, qreal height);
   void setWidth(qreal, bool forceReposition = false);
@@ -93,6 +91,7 @@ private slots:
   void handlePositionChanged(qreal xpos);
   void showWebPreview();
   void clearWebPreviewEvent(ClearWebPreviewEvent *event);
+  void deleteWebPreview();
 
 private:
   void setHandleXLimits();
@@ -127,10 +126,11 @@ private:
 
   struct WebPreview {
     ChatItem *parentItem;
-    WebPreviewItem *previewItem;
+    QGraphicsItem *previewItem;
     QString url;
     QRectF urlRect;
     QTimer delayTimer;
+    QTimer deleteTimer;
     WebPreview() : parentItem(0), previewItem(0) {}
   };
   WebPreview webPreview;
diff --git a/src/qtui/webpreviewitem.cpp b/src/qtui/webpreviewitem.cpp
index 29dfedec..eb12eea8 100644
--- a/src/qtui/webpreviewitem.cpp
+++ b/src/qtui/webpreviewitem.cpp
@@ -54,10 +54,6 @@ void WebPreviewItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *op
   painter->setBrush(Qt::black);
   painter->setRenderHints(QPainter::Antialiasing);
   painter->drawRoundedRect(boundingRect(), 10, 10);
-
-  painter->setPen(QPen(Qt::green));
-  QString text = QString::number(zValue());
-  painter->drawText(_boundingRect.center(), text);
 }
 
 #endif //#ifdef HAVE_WEBKIT
-- 
2.20.1