fixed retina-OSX icons in the side bar

YACReaderLibrary/images.qrc

@@ -64,6 +64,7 @@
         <file>../images/sidebar/expanded_branch_osx.png</file>
         <file>../images/sidebar/libraryIconSelected.png</file>
         <file>../images/sidebar/libraryOptions.png</file>
+        <file>../images/sidebar/libraryOptions@2x.png</file>
         <file>../images/sidebar/branch-open.png</file>
         <file>../images/sidebar/branch-closed.png</file>
         <file>../images/sidebar/expanded_branch_selected.png</file>

custom_widgets/yacreader_library_item_widget.cpp

@@ -16,16 +16,32 @@ YACReaderLibraryItemWidget::YACReaderLibraryItemWidget(QString n/*ame*/, QString
 
     QPixmap iconPixmap(":/images/sidebar/libraryIcon.png");
 	icon = new QLabel(this);
-	icon->setPixmap(iconPixmap);
+    icon->setPixmap(iconPixmap);
 
 	nameLabel = new QLabel(name,this);
 
-	options = new QToolButton(this);
+    options = new QToolButton(this);
+#ifdef Q_OS_MAC
+    //TODO fix this crazy hack for having a propper retina icon for the options
+    //this hack has been perpetrated using Qt 5.5.0
+    QString sourceOptionsImage;
+    if(devicePixelRatio()>1)
+        sourceOptionsImage = ":/images/sidebar/libraryOptions@2x.png";
+    else
+        sourceOptionsImage = ":/images/sidebar/libraryOptions.png";
+    QPixmap iconOptionsPixmap(sourceOptionsImage);
+    iconOptionsPixmap.setDevicePixelRatio(devicePixelRatio());
+    QLabel * helperLabel = new QLabel(options);
+    helperLabel->move(4,2);
+    helperLabel->setFixedSize(14,14);
+    helperLabel->setPixmap(iconOptionsPixmap);
+#else
     options->setIcon(QIcon(":/images/sidebar/libraryOptions.png"));
+#endif
 	options->setHidden(true);
-	options->setFixedWidth(18);
-	options->setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Minimum);
-	options->setStyleSheet("QToolButton {border:none;}");
+    options->setFixedWidth(18);
+    options->setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Minimum);
+    options->setStyleSheet("QToolButton {border:none;}");
 	connect(options,SIGNAL(clicked()),this,SIGNAL(showOptions()));
 	/*up = new QToolButton(this);
 	up->setIcon(QIcon(":/images/libraryUp.png"));

custom_widgets/yacreader_titled_toolbar.cpp

@@ -1,12 +1,12 @@
 #include "yacreader_titled_toolbar.h"
 
+#include <QAction>
 #include <QHBoxLayout>
 #include <QLabel>
-#include <QPixmap>
-#include <QToolButton>
-#include <QGraphicsDropShadowEffect>
 #include <QPainter>
-
+#include <QPixmap>
+#include <QPushButton>
+#include <QToolButton>
 
 
 DropShadowLabel::DropShadowLabel(QWidget* parent) :
@@ -95,14 +95,26 @@ void YACReaderTitledToolBar::addAction(QAction * action)
 {
 	QHBoxLayout * mainLayout = dynamic_cast<QHBoxLayout *>(layout());
 
-	QToolButton * tb = new QToolButton(this);
+//fix for QToolButton and retina support in OSX
+#ifdef Q_OS_MAC
+    QPushButton * pb = new QPushButton(this);
+    pb->setCursor(QCursor(Qt::ArrowCursor));
+    pb->setIcon(action->icon());
+    pb->addAction(action);
+
+    connect(pb, SIGNAL(clicked(bool)), action, SIGNAL(triggered(bool)));
+
+    mainLayout->addWidget(pb);
+#else
+    QToolButton * tb = new QToolButton(this);
     tb->setCursor(QCursor(Qt::ArrowCursor));
     tb->setDefaultAction(action);
     tb->setIconSize(QSize(16,16));
     tb->setSizePolicy(QSizePolicy::Minimum,QSizePolicy::Minimum);
 	//tb->setStyleSheet("QToolButton:hover {background-color:#C5C5C5;}");
 
-	mainLayout->addWidget(tb);
+    mainLayout->addWidget(tb);
+#endif
 }
 
 void YACReaderTitledToolBar::addSpacing(int spacing)