From 0bd7dda85b4264235e98e29ec4f8d8f497358f8d Mon Sep 17 00:00:00 2001
From: Csaba Pinter <pinter.csaba@gmail.com>
Date: Tue, 17 Oct 2023 12:14:35 +0100
Subject: [PATCH] ENH: Displaying "Calculating collisions..." to indicate
 processing

Re #218
---
 .../Resources/UI/qSlicerRoomsEyeViewModule.ui        |  2 +-
 RoomsEyeView/qSlicerRoomsEyeViewModuleWidget.cxx     | 12 ++++++++----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/RoomsEyeView/Resources/UI/qSlicerRoomsEyeViewModule.ui b/RoomsEyeView/Resources/UI/qSlicerRoomsEyeViewModule.ui
index 23c710fe..0740e02c 100644
--- a/RoomsEyeView/Resources/UI/qSlicerRoomsEyeViewModule.ui
+++ b/RoomsEyeView/Resources/UI/qSlicerRoomsEyeViewModule.ui
@@ -379,7 +379,7 @@
        <number>4</number>
       </property>
       <item row="2" column="0" colspan="3">
-       <widget class="QLabel" name="CollisionsDetected">
+       <widget class="QLabel" name="CollisionDetectionStatusLabel">
         <property name="text">
          <string>No collisions detected.</string>
         </property>
diff --git a/RoomsEyeView/qSlicerRoomsEyeViewModuleWidget.cxx b/RoomsEyeView/qSlicerRoomsEyeViewModuleWidget.cxx
index 2adf28ba..88297c40 100644
--- a/RoomsEyeView/qSlicerRoomsEyeViewModuleWidget.cxx
+++ b/RoomsEyeView/qSlicerRoomsEyeViewModuleWidget.cxx
@@ -1020,17 +1020,21 @@ void qSlicerRoomsEyeViewModuleWidget::checkForCollisions()
     return;
   }
 
+  d->CollisionDetectionStatusLabel->setText(QString::fromStdString("Calculating collisions..."));
+  d->CollisionDetectionStatusLabel->setStyleSheet("color: black");
+  QApplication::processEvents();
+
   std::string collisionString = d->logic()->CheckForCollisions(paramNode);
 
   if (collisionString.length() > 0)
   {
-    d->CollisionsDetected->setText(QString::fromStdString(collisionString));
-    d->CollisionsDetected->setStyleSheet("color: red");
+    d->CollisionDetectionStatusLabel->setText(QString::fromStdString(collisionString));
+    d->CollisionDetectionStatusLabel->setStyleSheet("color: red");
   }
   else
   {
-    d->CollisionsDetected->setText(QString::fromStdString("No collisions detected"));
-    d->CollisionsDetected->setStyleSheet("color: green");
+    d->CollisionDetectionStatusLabel->setText(QString::fromStdString("No collisions detected"));
+    d->CollisionDetectionStatusLabel->setStyleSheet("color: green");
   }
 }