From c6d2eee3c1aa1c877d5e8071556e91c7059d05c7 Mon Sep 17 00:00:00 2001
From: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Date: Thu, 4 Feb 2021 11:06:20 +0200
Subject: [PATCH] Introduce signals to notify about Shadow changes

These signal can be useful if you need to know when the shadow must be
repainted or its geometry has changed.
---
 src/shadow.cpp | 5 +++++
 src/shadow.h   | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/src/shadow.cpp b/src/shadow.cpp
index 15988c8c02..85d5167994 100644
--- a/src/shadow.cpp
+++ b/src/shadow.cpp
@@ -195,6 +195,7 @@ bool Shadow::init(const QVector< uint32_t > &data)
         return false;
     }
     buildQuads();
+    emit textureChanged();
     return true;
 }
 
@@ -225,6 +226,7 @@ bool Shadow::init(KDecoration2::Decoration *decoration)
         return false;
     }
     buildQuads();
+    emit textureChanged();
     return true;
 }
 
@@ -253,6 +255,7 @@ bool Shadow::init(const QPointer< KWaylandServer::ShadowInterface > &shadow)
         return false;
     }
     buildQuads();
+    emit textureChanged();
     return true;
 }
 
@@ -295,6 +298,7 @@ bool Shadow::init(const QWindow *window)
     }
 
     buildQuads();
+    emit textureChanged();
 
     return true;
 }
@@ -306,6 +310,7 @@ void Shadow::updateShadowRegion()
     const QRect bottom(0, m_topLevel->height(), m_topLevel->width(), m_bottomOffset);
     const QRect left(- m_leftOffset, - m_topOffset, m_leftOffset, m_topLevel->height() + m_topOffset + m_bottomOffset);
     m_shadowRegion = QRegion(top).united(right).united(bottom).united(left);
+    emit regionChanged();
 }
 
 void Shadow::buildQuads()
diff --git a/src/shadow.h b/src/shadow.h
index 60c6307df3..24ca42dc18 100644
--- a/src/shadow.h
+++ b/src/shadow.h
@@ -105,6 +105,10 @@ public:
         return m_decorationShadow.toWeakRef();
     }
 
+Q_SIGNALS:
+    void regionChanged();
+    void textureChanged();
+
 public Q_SLOTS:
     void geometryChanged();