From aedbaec4979162c7f56c4dee842be298973218fb Mon Sep 17 00:00:00 2001
From: Uwe Kindler <uwe_kindler@web.de>
Date: Sat, 31 Oct 2020 13:56:16 +0100
Subject: [PATCH] Addes support for setting DockWidgetTab icon size via
 stylesheet

---
 src/DockWidgetTab.cpp                  | 44 ++++++++++++++++++++++----
 src/DockWidgetTab.h                    | 16 ++++++++++
 src/stylesheets/focus_highlighting.css |  1 +
 3 files changed, 55 insertions(+), 6 deletions(-)

diff --git a/src/DockWidgetTab.cpp b/src/DockWidgetTab.cpp
index f4a1ae93..ca299fef 100644
--- a/src/DockWidgetTab.cpp
+++ b/src/DockWidgetTab.cpp
@@ -51,7 +51,6 @@
 #include "DockManager.h"
 #include "IconProvider.h"
 
-#include <iostream>
 
 namespace ads
 {
@@ -77,6 +76,7 @@ struct DockWidgetTabPrivate
 	QAbstractButton* CloseButton = nullptr;
 	QSpacerItem* IconTextSpacer;
 	QPoint TabDragStartPosition;
+	QSize IconSize;
 
 	/**
 	 * Private data constructor
@@ -186,6 +186,27 @@ struct DockWidgetTabPrivate
 		DragStartMousePosition = _this->mapFromGlobal(GlobalPos);
 	}
 
+	/**
+	 * Update the icon in case the icon size changed
+	 */
+	void updateIcon()
+	{
+		if (!IconLabel || Icon.isNull())
+		{
+			return;
+		}
+
+		if (IconSize.isValid())
+		{
+			IconLabel->setPixmap(Icon.pixmap(IconSize));
+		}
+		else
+		{
+			IconLabel->setPixmap(Icon.pixmap(_this->style()->pixelMetric(QStyle::PM_SmallIconSize, nullptr, _this)));
+		}
+		IconLabel->setVisible(true);
+	}
+
 };
 // struct DockWidgetTabPrivate
 
@@ -570,11 +591,7 @@ void CDockWidgetTab::setIcon(const QIcon& Icon)
 	}
 
 	d->Icon = Icon;
-	if (d->IconLabel)
-	{
-		d->IconLabel->setPixmap(Icon.pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize, nullptr, this)));
-		d->IconLabel->setVisible(true);
-	}
+	d->updateIcon();
 }
 
 
@@ -688,6 +705,21 @@ void CDockWidgetTab::updateStyle()
 }
 
 
+//============================================================================
+QSize CDockWidgetTab::iconSize() const
+{
+	return d->IconSize;
+}
+
+
+//============================================================================
+void CDockWidgetTab::setIconSize(const QSize& Size)
+{
+	d->IconSize = Size;
+	d->updateIcon();
+}
+
+
 
 
 } // namespace ads
diff --git a/src/DockWidgetTab.h b/src/DockWidgetTab.h
index 3ed7df89..6135cc79 100644
--- a/src/DockWidgetTab.h
+++ b/src/DockWidgetTab.h
@@ -31,6 +31,7 @@
 //                                   INCLUDES
 //============================================================================
 #include <QFrame>
+#include <QSize>
 
 #include "ads_globals.h"
 
@@ -50,6 +51,7 @@ class ADS_EXPORT CDockWidgetTab : public QFrame
 {
 	Q_OBJECT
 	Q_PROPERTY(bool activeTab READ isActiveTab WRITE setActiveTab NOTIFY activeTabChanged)
+	Q_PROPERTY(QSize iconSize READ iconSize WRITE setIconSize)
 
 private:
 	DockWidgetTabPrivate* d; ///< private data (pimpl)
@@ -159,6 +161,20 @@ private slots:
 	 */
 	void updateStyle();
 
+	/**
+	 * Returns the icon size.
+	 * If no explicit icon size has been set, the function returns an invalid
+	 * QSize
+	 */
+	QSize iconSize() const;
+
+	/**
+	 * Set an explicit icon size.
+	 * If no icon size has been set explicitely, than the tab sets the icon size
+	 * depending on the style
+	 */
+	void setIconSize(const QSize& Size);
+
 public slots:
 	virtual void setVisible(bool visible) override;
 
diff --git a/src/stylesheets/focus_highlighting.css b/src/stylesheets/focus_highlighting.css
index e954b0d7..50f80e6c 100644
--- a/src/stylesheets/focus_highlighting.css
+++ b/src/stylesheets/focus_highlighting.css
@@ -16,6 +16,7 @@ ads--CDockWidgetTab {
 	border-style: solid;
 	border-width: 0 1px 0 0;
 	padding: 0 0px;
+	qproperty-iconSize: 16px 16px;/* this is optional in case you would like to change icon size*/
 }
 
 ads--CDockWidgetTab[activeTab="true"] {