From f4a6644a827fd8da95e62ecfbbbf683b3ce35bc2 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 29 Sep 2018 22:26:45 +0200
Subject: Clear canvas if master file is being removed from the file list.

---
 src/canvas.cc   | 11 +++++++++++
 src/filelist.cc |  7 +++++++
 2 files changed, 18 insertions(+)

diff --git a/src/canvas.cc b/src/canvas.cc
index b9356d6..5542332 100644
--- a/src/canvas.cc
+++ b/src/canvas.cc
@@ -92,11 +92,22 @@ void Canvas::load(QString file)
 		mipmap = NULL;
 	}
 
+	if(file == "")
+	{
+		// Just clear the canvas
+		updateWav();
+		update();
+		return;
+	}
+
 	SF_INFO sf_info;
 	SNDFILE *fh = sf_open(file.toStdString().c_str(), SFM_READ, &sf_info);
 	if(!fh)
 	{
 		printf("Canvas load error '%s'\n", file.toStdString().c_str());
+		// Just clear the canvas
+		updateWav();
+		update();
 		return;
 	}
 
diff --git a/src/filelist.cc b/src/filelist.cc
index 7b2ec2b..b9b1462 100644
--- a/src/filelist.cc
+++ b/src/filelist.cc
@@ -475,6 +475,12 @@ void FileList::removeFile()
 {
 	auto audiofile_ids = instrument.getAudioFileList();
 	auto audiofile_id = audiofile_ids.begin() + currentIndex().row();
+	auto& audiofile = instrument.getAudioFile(*audiofile_id);
+	if(instrument.getMasterFile() == audiofile.getAbsoluteFile())
+	{
+		emit masterFileChanged(""); // Clear canvas
+	}
+
 	instrument.deleteAudioFile(*audiofile_id);
 
 	//emit fileRemoved(file, name);
@@ -490,5 +496,6 @@ void FileList::removeAllFiles()
 	}
 	reset();
 
+	emit masterFileChanged(""); // Clear canvas
 	emit allFilesRemoved();
 }
-- 
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