From 5ff49f4885de312f13fa864dddb23d018db13f5c Mon Sep 17 00:00:00 2001
From: Gary Wang <wzc782970009@gmail.com>
Date: Sat, 26 Sep 2020 10:47:28 +0800
Subject: [PATCH] fix: drag on image transparent pixels for panning viewport

---
 graphicsscene.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/graphicsscene.cpp b/graphicsscene.cpp
index 2569b5c..321d0d9 100644
--- a/graphicsscene.cpp
+++ b/graphicsscene.cpp
@@ -24,7 +24,9 @@ GraphicsScene::~GraphicsScene()
 void GraphicsScene::showImage(const QPixmap &pixmap)
 {
     this->clear();
-    m_theThing = this->addPixmap(pixmap);
+    QGraphicsPixmapItem * pixmapItem = this->addPixmap(pixmap);
+    pixmapItem->setShapeMode(QGraphicsPixmapItem::BoundingRectShape);
+    m_theThing = pixmapItem;
     this->setSceneRect(m_theThing->boundingRect());
 }