From d0f4ce324890197683869eafda0f3938ae619b8d Mon Sep 17 00:00:00 2001
From: Uwe Kindler <uwe_kindler@web.de>
Date: Thu, 26 Mar 2020 07:09:01 +0100
Subject: [PATCH] Added support to adhere the minimumSizeHint() of the content
 widget of a dock widget

---
 src/DockWidget.cpp | 17 ++++++++++++++++-
 src/DockWidget.h   | 24 ++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/DockWidget.cpp b/src/DockWidget.cpp
index 48fb857..9de729d 100644
--- a/src/DockWidget.cpp
+++ b/src/DockWidget.cpp
@@ -82,6 +82,7 @@ struct DockWidgetPrivate
 	QSize ToolBarIconSizeFloating = QSize(24, 24);
 	bool IsFloatingTopLevel = false;
 	QList<QAction*> TitleBarActions;
+	CDockWidget::eMinimumSizeHintMode MinimumSizeHintMode = CDockWidget::MinimumSizeHintFromDockWidget;
 
 	/**
 	 * Private data constructor
@@ -424,6 +425,13 @@ void CDockWidget::setToggleViewActionMode(eToggleViewActionMode Mode)
 }
 
 
+//============================================================================
+void CDockWidget::setMinimumSizeHintMode(eMinimumSizeHintMode Mode)
+{
+	d->MinimumSizeHintMode = Mode;
+}
+
+
 //============================================================================
 void CDockWidget::toggleView(bool Open)
 {
@@ -753,7 +761,14 @@ void CDockWidget::setClosedState(bool Closed)
 //============================================================================
 QSize CDockWidget::minimumSizeHint() const
 {
-	return QSize(60, 40);
+	if (d->MinimumSizeHintMode == CDockWidget::MinimumSizeHintFromDockWidget || !d->Widget)
+	{
+		return QSize(60, 40);
+	}
+	else
+	{
+		return d->Widget->minimumSizeHint();
+	}
 }
 
 
diff --git a/src/DockWidget.h b/src/DockWidget.h
index 1cb6f63..de3e8a2 100644
--- a/src/DockWidget.h
+++ b/src/DockWidget.h
@@ -189,6 +189,23 @@ public:
         ForceNoScrollArea
     };
 
+
+    /**
+     * The mode of the minimumSizeHint() that is returned by the DockWidget
+     * minimumSizeHint() function.
+     * To ensure, that a dock widget does not block resizing, the dock widget
+     * reimplements minimumSizeHint() function to return a very small minimum
+     * size hint. If you would like to adhere the minimumSizeHint() from the
+     * content widget, the set the minimumSizeHintMode() to
+     * MinimumSizeHintFromContent.
+     */
+    enum eMinimumSizeHintMode
+    {
+    	MinimumSizeHintFromDockWidget,
+    	MinimumSizeHintFromContent
+    };
+
+
     /**
      * This mode configures the behavior of the toggle view action.
      * If the mode if ActionModeToggle, then the toggle view action is
@@ -334,6 +351,13 @@ public:
      */
     void setToggleViewActionMode(eToggleViewActionMode Mode);
 
+    /**
+     * Configures the minimum size hint that is returned by the
+     * minimumSizeHint() function.
+     * \see eMinimumSizeHintMode for a detailed description
+     */
+    void setMinimumSizeHintMode(eMinimumSizeHintMode Mode);
+
     /**
      * Sets the dock widget icon that is shown in tabs and in toggle view
      * actions