From 1177cd862a8115ae4a932c6583dcf375f3f0f99d Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Fri, 6 Jan 2017 20:40:21 +0100
Subject: [PATCH] refs #855, re-center load indicator when resizing load
 overview

---
 .../components/dbloadoverviewcomponent.cpp    | 28 +++++++++++++++++--
 .../components/dbloadoverviewcomponent.h      | 10 +++++++
 2 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/src/blackgui/components/dbloadoverviewcomponent.cpp b/src/blackgui/components/dbloadoverviewcomponent.cpp
index 76dbb7e13..84b9fb39a 100644
--- a/src/blackgui/components/dbloadoverviewcomponent.cpp
+++ b/src/blackgui/components/dbloadoverviewcomponent.cpp
@@ -31,7 +31,7 @@ namespace BlackGui
             Q_ASSERT_X(sGui->getWebDataServices(), Q_FUNC_INFO, "no data services");
 
             ui->setupUi(this);
-            admitCaches(); // in background
+            this->admitCaches(); // in background
 
             ui->lbl_DatabaseUrl->setTextFormat(Qt::RichText);
             ui->lbl_DatabaseUrl->setTextInteractionFlags(Qt::TextBrowserInteraction);
@@ -92,6 +92,28 @@ namespace BlackGui
             ui->tb_SharedReloadDistributors->setVisible(visible);
         }
 
+        void CDbLoadOverviewComponent::resizeEvent(QResizeEvent *event)
+        {
+            if (this->isShowingLoadIndicator())
+            {
+                // re-center
+                this->centerLoadIndicator();
+            }
+            QFrame::resizeEvent(event);
+        }
+
+        bool CDbLoadOverviewComponent::isShowingLoadIndicator() const
+        {
+            return m_loadIndicator && this->isVisible() && m_loadIndicator->isAnimated();
+        }
+
+        void CDbLoadOverviewComponent::centerLoadIndicator()
+        {
+            if (!m_loadIndicator) { return; }
+            const QPoint middle = this->visibleRegion().boundingRect().center();
+            this->m_loadIndicator->centerLoadIndicator(middle);
+        }
+
         void CDbLoadOverviewComponent::ps_setValues()
         {
             if (!sGui) { return; }
@@ -172,8 +194,8 @@ namespace BlackGui
             {
                 this->m_loadIndicator = new CLoadIndicator(64, 64, this);
             }
-            const QPoint middle = this->rect().center();
-            this->m_loadIndicator->centerLoadIndicator(middle);
+
+            this->centerLoadIndicator();
             this->m_loadIndicator->startAnimation(true);
         }
 
diff --git a/src/blackgui/components/dbloadoverviewcomponent.h b/src/blackgui/components/dbloadoverviewcomponent.h
index 11712af64..034478488 100644
--- a/src/blackgui/components/dbloadoverviewcomponent.h
+++ b/src/blackgui/components/dbloadoverviewcomponent.h
@@ -47,11 +47,21 @@ namespace BlackGui
             //! Visible shared refresh buttons
             void setVisibleSharedRefreshButtons(bool visible);
 
+            //! Showing load indicator?
+            bool isShowingLoadIndicator() const;
+
         signals:
             //! Trigger GUI update
             //! \private
             void ps_triggerDigestGuiUpdate();
 
+        protected:
+            //! \copydoc QWidget::resizeEvent
+            virtual void resizeEvent(QResizeEvent *event) override;
+
+            //! Center load indicator
+            void centerLoadIndicator();
+
         private:
             QScopedPointer<Ui::CDbLoadOverviewComponent> ui;
             BlackGui::CLoadIndicator *m_loadIndicator = nullptr; //!< load indicator if needed