From 9aa997e5740fb6f5442ee2de5b2789530836a142 Mon Sep 17 00:00:00 2001
From: Johannes Lorenz <j.git@lorenz-ho.me>
Date: Sat, 16 Mar 2019 16:38:16 +0100
Subject: [PATCH] Allow TabWidget to be variable sized

---
 include/TabWidget.h           |  8 +++++--
 src/gui/widgets/TabWidget.cpp | 43 ++++++++++++++++++++++++++++++-----
 2 files changed, 43 insertions(+), 8 deletions(-)

diff --git a/include/TabWidget.h b/include/TabWidget.h
index dacd2648b..11e4da40a 100644
--- a/include/TabWidget.h
+++ b/include/TabWidget.h
@@ -36,7 +36,10 @@ class TabWidget : public QWidget
 {
 	Q_OBJECT
 public:
-	TabWidget( const QString & _caption, QWidget * _parent, bool usePixmap = false );
+	//! @param resizable If true, the widget resizes to fit the size of all tabs
+	//!   If false, all child widget will be cut down to the TabWidget's size
+	TabWidget( const QString & _caption, QWidget * _parent,
+				bool usePixmap = false, bool resizable = false );
 	virtual ~TabWidget() = default;
 
 	void addTab( QWidget * w, const QString & name, const char *pixmap = NULL, int idx = -1 );
@@ -74,7 +77,7 @@ protected:
 	virtual void paintEvent( QPaintEvent * _pe );
 	virtual void resizeEvent( QResizeEvent * _re );
 	virtual void wheelEvent( QWheelEvent * _we );
-
+	virtual QSize minimumSizeHint() const;
 
 private:
 	struct widgetDesc
@@ -88,6 +91,7 @@ private:
 
 	widgetStack m_widgets;
 
+	bool	m_resizable;
 	int 	m_activeTab;
 	QString m_caption;      // Tab caption, used as the tooltip text on icon tabs
 	quint8 	m_tabbarHeight; // The height of the tab bar
diff --git a/src/gui/widgets/TabWidget.cpp b/src/gui/widgets/TabWidget.cpp
index f06710098..49898a3c7 100644
--- a/src/gui/widgets/TabWidget.cpp
+++ b/src/gui/widgets/TabWidget.cpp
@@ -34,8 +34,10 @@
 #include "gui_templates.h"
 #include "embed.h"
 
-TabWidget::TabWidget( const QString & caption, QWidget * parent, bool usePixmap ) :
+TabWidget::TabWidget(const QString & caption, QWidget * parent, bool usePixmap,
+					 bool resizable) :
 	QWidget( parent ),
+	m_resizable( resizable ),
 	m_activeTab( 0 ),
 	m_caption( caption ),
 	m_usePixmap( usePixmap ),
@@ -81,7 +83,9 @@ void TabWidget::addTab( QWidget * w, const QString & name, const char *pixmap, i
 	m_widgets[idx] = d;
 
 	// Position tab's window
-	w->setFixedSize( width() - 4, height() - m_tabbarHeight );
+	if(!m_resizable) {
+		w->setFixedSize( width() - 4, height() - m_tabbarHeight );
+	}
 	w->move( 2, m_tabbarHeight - 1 );
 	w->hide();
 
@@ -189,17 +193,19 @@ void TabWidget::mousePressEvent( QMouseEvent * me )
 
 void TabWidget::resizeEvent( QResizeEvent * )
 {
-	for( widgetStack::iterator it = m_widgets.begin();
-						it != m_widgets.end(); ++it )
+	if(!m_resizable)
 	{
-		( *it ).w->setFixedSize( width() - 4, height() - m_tabbarHeight );
+		for( widgetStack::iterator it = m_widgets.begin();
+							it != m_widgets.end(); ++it )
+		{
+			( *it ).w->setFixedSize( width() - 4, height() - m_tabbarHeight );
+		}
 	}
 }
 
 
 
 
-
 void TabWidget::paintEvent( QPaintEvent * pe )
 {
 	QPainter p( this );
@@ -300,6 +306,31 @@ void TabWidget::wheelEvent( QWheelEvent * we )
 	setActiveTab( tab );
 }
 
+
+
+
+// Let parent widgets know how much space this tab widget needs
+QSize TabWidget::minimumSizeHint() const
+{
+	if(m_resizable)
+	{
+		int maxWidth = 0, maxHeight = 0;
+		for( widgetStack::const_iterator it = m_widgets.begin();
+							it != m_widgets.end(); ++it )
+		{
+			maxWidth = std::max(maxWidth, it->w->width());
+			maxHeight = std::max(maxHeight, it->w->height());
+		}
+		return QSize(maxWidth + 4, maxHeight + m_tabbarHeight);
+	}
+	else {
+		return QWidget::minimumSizeHint();
+	}
+}
+
+
+
+
 // Return the color to be used to draw a TabWidget's title text (if any)
 QColor TabWidget::tabTitleText() const
 {