refactor: move loadHidpiIcon from ActionManager to ToolButton.

setting loadHidpiIcon in ToolButton is better than ActionManager.
ToolButton has less code and its aim also include loading icon.

app/actionmanager.cpp

@@ -5,22 +5,11 @@
 #include "actionmanager.h"
 
 #include "mainwindow.h"
+#include "toolbutton.h"
 
 #include <QGuiApplication>
-#include <QSvgRenderer>
 #include <QPainter>
 
-QIcon ActionManager::loadHidpiIcon(const QString &resp, QSize sz)
-{
-    QSvgRenderer r(resp);
-    QPixmap pm = QPixmap(sz * qApp->devicePixelRatio());
-    pm.fill(Qt::transparent);
-    QPainter p(&pm);
-    r.render(&p);
-    pm.setDevicePixelRatio(qApp->devicePixelRatio());
-    return QIcon(pm);
-}
-
 void ActionManager::setupAction(MainWindow *mainWindow)
 {
     // region: Action and Its Icon Creation
@@ -34,7 +23,7 @@ void ActionManager::setupAction(MainWindow *mainWindow)
     auto create_action = [] (QWidget *w, QAction **a, QString i, QString an, bool iconFromTheme = false) {
         *a = new QAction(w);
         if (!i.isNull())
-            (*a)->setIcon(iconFromTheme ? QIcon::fromTheme(i) : ActionManager::loadHidpiIcon(i));
+            (*a)->setIcon(iconFromTheme ? QIcon::fromTheme(i) : ToolButton::loadHidpiIcon(i));
         (*a)->setObjectName(an);
         w->addAction(*a);
     };

app/actionmanager.h

@@ -21,8 +21,6 @@ public:
     void setupShortcuts();
     void enablePrevNextPictureAction(bool enablePrevPictureAction, bool enableNextPictureAction);
 
-    static QIcon loadHidpiIcon(const QString &resp, QSize sz = QSize(32, 32));
-
 public:
     QAction *actionOpen;
 

app/toolbutton.cpp

@@ -4,9 +4,10 @@
 
 #include "toolbutton.h"
 
-#include "actionmanager.h"
 #include "opacityhelper.h"
 
+#include <QSvgRenderer>
+#include <QGuiApplication>
 #include <QPainter>
 #include <QGraphicsOpacityEffect>
 #include <QPropertyAnimation>
@@ -29,7 +30,18 @@ ToolButton::ToolButton(bool hoverColor, QWidget *parent)
 
 void ToolButton::setIconResourcePath(const QString &iconp)
 {
-    this->setIcon(ActionManager::loadHidpiIcon(iconp, this->iconSize()));
+    this->setIcon(ToolButton::loadHidpiIcon(iconp, this->iconSize()));
+}
+
+QIcon ToolButton::loadHidpiIcon(const QString &resp, QSize sz)
+{
+    QSvgRenderer r(resp);
+    QPixmap pm = QPixmap(sz * qApp->devicePixelRatio());
+    pm.fill(Qt::transparent);
+    QPainter p(&pm);
+    r.render(&p);
+    pm.setDevicePixelRatio(qApp->devicePixelRatio());
+    return QIcon(pm);
 }
 
 void ToolButton::setOpacity(qreal opacity, bool animated)

app/toolbutton.h

@@ -15,6 +15,8 @@ public:
     ToolButton(bool hoverColor = false, QWidget * parent = nullptr);
     void setIconResourcePath(const QString &iconp);
 
+    static QIcon loadHidpiIcon(const QString &resp, QSize sz = QSize(32, 32));
+
 public slots:
     void setOpacity(qreal opacity, bool animated = true);