const qreal minContentsWidth = 200;
+class ClearWebPreviewEvent : public QEvent {
+public:
+ inline ClearWebPreviewEvent() : QEvent(QEvent::User) {}
+};
+
ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal width, QObject *parent)
: QGraphicsScene(0, 0, width, 0, parent),
_idString(idString),
if(model->rowCount() > 0)
rowsInserted(QModelIndex(), 0, model->rowCount() - 1);
+
+ webPreview.delayTimer.setSingleShot(true);
+ connect(&webPreview.delayTimer, SIGNAL(timeout()), this, SLOT(showWebPreview()));
}
ChatScene::~ChatScene() {
void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
Q_UNUSED(index);
-
- clearWebPreview();
-
// QModelIndex sidx = model()->index(start, 0);
// QModelIndex eidx = model()->index(end, 0);
// qDebug() << "rowsInserted" << start << end << "-" << sidx.data(MessageModel::MsgIdRole).value<MsgId>() << eidx.data(MessageModel::MsgIdRole).value<MsgId>();
void ChatScene::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) {
Q_UNUSED(parent);
- clearWebPreview();
-
qreal h = 0; // total height of removed items;
bool atTop = (start == 0);
setSceneRect(rect);
}
+void ChatScene::customEvent(QEvent *event) {
+ if(event->type() != QEvent::User)
+ return;
+
+ event->accept();
+ clearWebPreviewEvent();
+}
void ChatScene::loadWebPreview(ChatItem *parentItem, const QString &url, const QRectF &urlRect) {
#ifndef HAVE_WEBKIT
delete webPreview.previewItem;
}
webPreview.previewItem = new WebPreviewItem(url);
- addItem(webPreview.previewItem);
+ webPreview.delayTimer.start(2000);
}
if(webPreview.urlRect != urlRect) {
webPreview.urlRect = urlRect;
Q_UNUSED(parentItem)
#else
if(parentItem == 0 || webPreview.parentItem == parentItem) {
- if(webPreview.previewItem) {
- removeItem(webPreview.previewItem);
- delete webPreview.previewItem;
- webPreview.previewItem = 0;
- }
- webPreview.parentItem = 0;
- webPreview.url = QString();
- webPreview.urlRect = QRectF();
+ // posting an event ensures that the item will not be removed as
+ // the result of another event. this could result in bad segfaults
+ QCoreApplication::postEvent(this, new ClearWebPreviewEvent());
}
#endif
}
+
+void ChatScene::showWebPreview() {
+#ifdef HAVE_WEBKIT
+ if(webPreview.previewItem)
+ addItem(webPreview.previewItem);
+#endif
+}
+
+void ChatScene::clearWebPreviewEvent() {
+#ifdef HAVE_WEBKIT
+ if(webPreview.previewItem) {
+ if(!webPreview.delayTimer.isActive())
+ removeItem(webPreview.previewItem);
+ else
+ webPreview.delayTimer.stop();
+ delete webPreview.previewItem;
+ webPreview.previewItem = 0;
+ }
+ webPreview.parentItem = 0;
+ webPreview.url = QString();
+ webPreview.urlRect = QRectF();
+#endif
+}