From f3159fd682da959fb32faeb2272e238b18888453 Mon Sep 17 00:00:00 2001
From: Jean-Baptiste Mardelle <jb@kdenlive.org>
Date: Sun, 15 Feb 2009 10:41:27 +0000
Subject: [PATCH] Only allow one fadein / fadeout per clip:
 http://www.kdenlive.org:80/mantis/view.php?id=676

svn path=/branches/KDE4/; revision=3052
---
 effects/fadein.xml      | 2 +-
 effects/fadeout.xml     | 2 +-
 src/customtrackview.cpp | 4 ++++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/effects/fadein.xml b/effects/fadein.xml
index 6906f01d..99dc7e74 100644
--- a/effects/fadein.xml
+++ b/effects/fadein.xml
@@ -1,5 +1,5 @@
 <!DOCTYPE kpartgui>
-<effect tag="volume" id="fadein" type="audio">
+<effect tag="volume" id="fadein" type="audio" unique="1">
 	<name>Fade in</name>
 	<description>Fade in audio track</description>
 	<author></author>
diff --git a/effects/fadeout.xml b/effects/fadeout.xml
index c33c4655..5f1c4b2d 100644
--- a/effects/fadeout.xml
+++ b/effects/fadeout.xml
@@ -1,5 +1,5 @@
 <!DOCTYPE kpartgui>
-<effect tag="volume" id="fadeout" type="audio">
+<effect tag="volume" id="fadeout" type="audio" unique="1">
 	<name>Fade out</name>
 	<description>Fade in audio track</description>
 	<author></author>
diff --git a/src/customtrackview.cpp b/src/customtrackview.cpp
index f948af70..18254843 100644
--- a/src/customtrackview.cpp
+++ b/src/customtrackview.cpp
@@ -1067,6 +1067,10 @@ void CustomTrackView::slotAddEffect(QDomElement effect, GenTime pos, int track)
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == AVWIDGET) {
             ClipItem *item = (ClipItem *)itemList.at(i);
+	    if (item->hasEffect(effect.attribute("tag"), effect.attribute("id")) != -1 && effect.attribute("unique", "0") != "0") {
+		emit displayMessage(i18n("Effect already present in clip"), ErrorMessage);
+		continue;
+	    }
             item->initEffect(effect);
             if (effect.attribute("tag") == "ladspa") {
                 QString ladpsaFile = m_document->getLadspaFile();
-- 
2.39.2