Added function internal::setButtonIcon to unify code for setting DockAreaTitleBar and DockWidgetTab icons

src/DockAreaTitleBar.cpp

@@ -101,34 +101,6 @@ struct DockAreaTitleBarPrivate
 	{
 		return CDockManager::configFlags().testFlag(Flag);
 	}
-
-    /**
-     * Helper function to set title bar button icons depending on operating
-     * system and to avoid duplicated code. On windows the standard icons
-     * are blurry since Qt 5.11 so we need to do some additional steps.
-     * If the global IconPovider of the dockmanager provides a custom
-     * Icon for the given CustomIconId, the this icon will be used.
-     */
-    void setTitleBarButtonIcon(tTitleBarButton* Button, QStyle::StandardPixmap StandarPixmap,
-    	ads::eIcon CustomIconId)
-    {
-    	// First we try to use custom icons if available
-    	QIcon Icon = CDockManager::iconProvider().customIcon(CustomIconId);
-    	if (!Icon.isNull())
-    	{
-    		Button->setIcon(Icon);
-    		return;
-    	}
-
-    #ifdef Q_OS_LINUX
-        Button->setIcon(_this->style()->standardIcon(StandarPixmap));
-    #else
-        QPixmap normalPixmap = _this->style()->standardPixmap(StandarPixmap, 0, Button);
-        Icon.addPixmap(internal::createTransparentPixmap(normalPixmap, 0.25), QIcon::Disabled);
-        Icon.addPixmap(normalPixmap, QIcon::Normal);
-        Button->setIcon(Icon);
-    #endif
-    }
 };// struct DockAreaTitleBarPrivate
 
 
@@ -143,19 +115,19 @@ class CTitleBarButton : public tTitleBarButton
 	bool Visible = true;
 	bool HideWhenDisabled = false;
 public:
+	using Super = tTitleBarButton;
 	CTitleBarButton(bool visible = true, QWidget* parent = nullptr)
-		: tTitleBarButton(parent)
-		, Visible(visible)
-		, HideWhenDisabled(DockAreaTitleBarPrivate::testConfigFlag(CDockManager::DockAreaHideDisabledButtons))
-	{
-		//this->setVisible(Visible); // this causes flickering and seems not to be needed TODO: investigate further and in case it IS needed fix flickering
-	}
+		: tTitleBarButton(parent),
+		  Visible(visible),
+		  HideWhenDisabled(DockAreaTitleBarPrivate::testConfigFlag(CDockManager::DockAreaHideDisabledButtons))
+	{}
 	
 
+	/**
+	 * Adjust this visibility change request with our internal settings:
+	 */
 	virtual void setVisible(bool visible) override
 	{
-		// Adjust this visibility change request with our internal settings:
-
 		// 'visible' can stay 'true' if and only if this button is configured to generaly visible:
 		visible = visible && this->Visible;
 
@@ -165,10 +137,13 @@ public:
 			visible = isEnabled();
 		}
 
-		tTitleBarButton::setVisible(visible);
+		Super::setVisible(visible);
 	}
 	
 protected:
+	/**
+	 * Handle EnabledChanged signal to set button invisible if the configured
+	 */
 	bool event(QEvent *ev) override
 	{
 		if(QEvent::EnabledChange == ev->type() && HideWhenDisabled)
@@ -177,7 +152,7 @@ protected:
 			setVisible(isEnabled());
 		}
 
-		return tTitleBarButton::event(ev);;
+		return Super::event(ev);;
 	}
 };
 
@@ -200,7 +175,7 @@ void DockAreaTitleBarPrivate::createButtons()
 	TabsMenuButton->setObjectName("tabsMenuButton");
 	TabsMenuButton->setAutoRaise(true);
 	TabsMenuButton->setPopupMode(QToolButton::InstantPopup);
-	setTitleBarButtonIcon(TabsMenuButton, QStyle::SP_TitleBarUnshadeButton, ads::DockAreaMenuIcon);
+	internal::setButtonIcon(TabsMenuButton, QStyle::SP_TitleBarUnshadeButton, ads::DockAreaMenuIcon);
 	QMenu* TabsMenu = new QMenu(TabsMenuButton);
 #ifndef QT_NO_TOOLTIP
 	TabsMenu->setToolTipsVisible(true);
@@ -219,7 +194,7 @@ void DockAreaTitleBarPrivate::createButtons()
 	UndockButton->setObjectName("undockButton");
 	UndockButton->setAutoRaise(true);
 	internal::setToolTip(UndockButton, QObject::tr("Detach Group"));
-	setTitleBarButtonIcon(UndockButton, QStyle::SP_TitleBarNormalButton, ads::DockAreaUndockIcon);
+	internal::setButtonIcon(UndockButton, QStyle::SP_TitleBarNormalButton, ads::DockAreaUndockIcon);
 	UndockButton->setSizePolicy(ButtonSizePolicy);
 	TopLayout->addWidget(UndockButton, 0);
 	_this->connect(UndockButton, SIGNAL(clicked()), SLOT(onUndockButtonClicked()));
@@ -228,7 +203,7 @@ void DockAreaTitleBarPrivate::createButtons()
 	CloseButton = new CTitleBarButton(testConfigFlag(CDockManager::DockAreaHasCloseButton));
 	CloseButton->setObjectName("closeButton");
 	CloseButton->setAutoRaise(true);
-	setTitleBarButtonIcon(CloseButton, QStyle::SP_TitleBarCloseButton, ads::DockAreaCloseIcon);
+	internal::setButtonIcon(CloseButton, QStyle::SP_TitleBarCloseButton, ads::DockAreaCloseIcon);
 	if (testConfigFlag(CDockManager::DockAreaCloseButtonClosesTab))
 	{
 		internal::setToolTip(CloseButton, QObject::tr("Close Active Tab"));

src/DockWidgetTab.cpp

@@ -173,15 +173,7 @@ void DockWidgetTabPrivate::createLayout()
 
 	CloseButton = createCloseButton();
 	CloseButton->setObjectName("tabCloseButton");
-	QIcon CloseIcon = CDockManager::iconProvider().customIcon(TabCloseIcon);
-	if (CloseIcon.isNull())
-	{
-		// The standard icons do does not look good on high DPI screens
-		QPixmap normalPixmap = _this->style()->standardPixmap(QStyle::SP_TitleBarCloseButton, 0, CloseButton);
-		CloseIcon.addPixmap(normalPixmap, QIcon::Normal);
-		CloseIcon.addPixmap(internal::createTransparentPixmap(normalPixmap, 0.25), QIcon::Disabled);
-	}
-	CloseButton->setIcon(CloseIcon);
+	internal::setButtonIcon(CloseButton, QStyle::SP_TitleBarCloseButton, TabCloseIcon);
     CloseButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
     _this->onDockWidgetFeaturesChanged();
 	internal::setToolTip(CloseButton, QObject::tr("Close Tab"));

src/ads_globals.cpp

@@ -30,8 +30,11 @@
 //============================================================================
 #include <QVariant>
 #include <QPainter>
+#include <QAbstractButton>
 
 #include "DockSplitter.h"
+#include "DockManager.h"
+#include "IconProvider.h"
 #include "ads_globals.h"
 
 
@@ -90,6 +93,31 @@ void hideEmptyParentSplitters(CDockSplitter* Splitter)
 	}
 }
 
+
+//============================================================================
+void setButtonIcon(QAbstractButton* Button, QStyle::StandardPixmap StandarPixmap,
+	ads::eIcon CustomIconId)
+{
+	// First we try to use custom icons if available
+	QIcon Icon = CDockManager::iconProvider().customIcon(CustomIconId);
+	if (!Icon.isNull())
+	{
+		Button->setIcon(Icon);
+		return;
+	}
+
+#ifdef Q_OS_LINUX
+	Button->setIcon(Button->style()->standardIcon(StandarPixmap));
+#else
+	// The standard icons does not look good on high DPI screens so we create
+	// our own "standard" icon here.
+	QPixmap normalPixmap = Button->style()->standardPixmap(StandarPixmap, 0, Button);
+	Icon.addPixmap(internal::createTransparentPixmap(normalPixmap, 0.25), QIcon::Disabled);
+	Icon.addPixmap(normalPixmap, QIcon::Normal);
+	Button->setIcon(Icon);
+#endif
+}
+
 } // namespace internal
 } // namespace ads
 

src/ads_globals.h

@@ -35,6 +35,9 @@
 #include <QPixmap>
 #include <QWidget>
 #include <QDebug>
+#include <QStyle>
+
+class QAbstractButton;
 
 #ifndef ADS_STATIC
 #ifdef ADS_SHARED_EXPORT
@@ -231,6 +234,23 @@ void setToolTip(QObjectPtr obj, const QString &tip)
 #endif
 }
 
+
+/**
+ * Helper function to set the icon of a certain button.
+ * Use this function to set the icons for the dock area and dock widget buttons.
+ * The function first uses the CustomIconId to get an icon from the
+ * CIconProvider. You can register your custom icons with the icon provider, if
+ * you do not want to use the default buttons and if you do not want to use
+ * stylesheets.
+ * If the IconProvider does not return a valid icon (icon is null), the function
+ * fetches the given standard pixmap from the QStyle.
+ * param[in] Button The button whose icons are to be set
+ * param[in] StandardPixmap The standard pixmap to be used for the button
+ * param[in] CustomIconId The identifier for the custom icon.
+ */
+void setButtonIcon(QAbstractButton* Button, QStyle::StandardPixmap StandarPixmap,
+	ads::eIcon CustomIconId);
+
 } // namespace internal
 } // namespace ads