From be86a772ce4e631fb6ba36f550befd1b5396a126 Mon Sep 17 00:00:00 2001
From: Uwe Kindler <uwe_kindler@web.de>
Date: Mon, 7 Nov 2022 08:19:00 +0100
Subject: [PATCH] Implemented custom close handling for dynamically created
 image viewers

---
 demo/MainWindow.cpp | 19 ++++++++++++++++---
 demo/MainWindow.h   |  1 +
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/demo/MainWindow.cpp b/demo/MainWindow.cpp
index 1325404..1509b4b 100644
--- a/demo/MainWindow.cpp
+++ b/demo/MainWindow.cpp
@@ -873,6 +873,20 @@ void CMainWindow::onEditorCloseRequested()
 }
 
 
+//============================================================================
+void CMainWindow::onImageViewerCloseRequested()
+{
+	auto DockWidget = qobject_cast<ads::CDockWidget*>(sender());
+	int Result = QMessageBox::question(this, "Close Image Viewer", QString("%1 "
+		"contains unsaved changes? Would you like to close it?")
+		.arg(DockWidget->windowTitle()));
+	if (QMessageBox::Yes == Result)
+	{
+		DockWidget->closeDockWidget();
+	}
+}
+
+
 //============================================================================
 void CMainWindow::createTable()
 {
@@ -931,9 +945,8 @@ void CMainWindow::createImageViewer()
 	DockWidget->setFeature(ads::CDockWidget::DockWidgetForceCloseWithArea, true);
 	DockWidget->setFeature(ads::CDockWidget::CustomCloseHandling, true);
 	DockWidget->resize(QSize(640, 480));
-	connect(DockWidget, &ads::CDockWidget::closeRequested, [this](){
-		qDebug() << "ImageViewer close requested";
-	});
+	connect(DockWidget, &ads::CDockWidget::closeRequested, this,
+		&CMainWindow::onImageViewerCloseRequested);
 
 	if (a->text().startsWith("Floating"))
 	{
diff --git a/demo/MainWindow.h b/demo/MainWindow.h
index 0eeb525..4afee14 100644
--- a/demo/MainWindow.h
+++ b/demo/MainWindow.h
@@ -63,6 +63,7 @@ private slots:
 	void createEditor();
 	void createTable();
 	void onEditorCloseRequested();
+	void onImageViewerCloseRequested();
 	void showStatusDialog();
 	void toggleDockWidgetWindowTitle();
 	void applyVsStyle();