Fix background image reset

Reset background image when document switched

src/document.cpp

@@ -932,6 +932,13 @@ void Document::updateTurnaround(const QImage &image)
     emit turnaroundChanged();
 }
 
+void Document::clearTurnaround()
+{
+    turnaround = QImage();
+    turnaroundPngByteArray.clear();
+    emit turnaroundChanged();
+}
+
 void Document::updateTextureImage(QImage *image)
 {
     delete textureImageByteArray;

src/document.h

@@ -473,6 +473,7 @@ public:
     const std::vector<RigBone> *resultRigBones() const;
     const std::map<int, RigVertexWeights> *resultRigWeights() const;
     void updateTurnaround(const QImage &image);
+    void clearTurnaround();
     void updateTextureImage(QImage *image);
     void updateTextureNormalImage(QImage *image);
     void updateTextureMetalnessImage(QImage *image);

src/documentwindow.cpp

@@ -1432,6 +1432,7 @@ void DocumentWindow::newDocument()
     m_document->clearHistories();
     m_document->resetScript();
     m_document->reset();
+    m_document->clearTurnaround();
     m_document->saveSnapshot();
 }
 
@@ -1779,6 +1780,7 @@ void DocumentWindow::openPathAs(const QString &path, const QString &asName)
     m_document->clearHistories();
     m_document->resetScript();
     m_document->reset();
+    m_document->clearTurnaround();
     m_document->saveSnapshot();
     
     if (path.endsWith(".xml")) {

src/skeletongraphicswidget.cpp

@@ -722,7 +722,7 @@ void SkeletonGraphicsWidget::turnaroundChanged()
 void SkeletonGraphicsWidget::updateTurnaround()
 {
     const QImage *turnaroundImage = &m_document->turnaround;
-    QImage onePixel(16, 10, QImage::Format_ARGB32);
+    QImage onePixel(2, 1, QImage::Format_ARGB32);
     if (turnaroundImage->isNull()) {
         onePixel.fill(Qt::transparent);
         turnaroundImage = &onePixel;