Make as explicit, use nullptr

Modules/devinfo/solidhelper.h

@@ -30,7 +30,7 @@ class SolidHelper
 {
 
   public:
-    SolidHelper() {};
+    SolidHelper() {}
     Solid::DeviceInterface::Type deviceType(const Solid::Device *);
 };
 

Modules/memory/chartWidget.h

@@ -33,8 +33,9 @@ class QWidget;
 #include "base.h"
 
 class Chart : public QWidget {
+    Q_OBJECT
 public:
-	Chart(QWidget* parent = nullptr);
+        explicit Chart(QWidget* parent = nullptr);
 	
 	void setMemoryInfos(t_memsize* memoryInfos);
 	void setFreeMemoryLabel(QLabel* freeMemoryLabel);
@@ -45,9 +46,9 @@ protected:
 	
 	bool drawChart(t_memsize total, const QList<t_memsize>& used, const QList<QColor>& colors, const QList<QString>& texts);
 	
-	t_memsize* memoryInfos;
+        t_memsize* memoryInfos = nullptr;
 	
-	QLabel* freeMemoryLabel;
+        QLabel* freeMemoryLabel = nullptr;
 	
 };
 
@@ -64,11 +65,11 @@ public:
 	
 private:
 	
-	QLabel* titleLabel;
+        QLabel* titleLabel = nullptr;
 	
-	Chart* chart;
+        Chart* chart = nullptr;
 	
-	QLabel* freeMemoryLabel;
+        QLabel* freeMemoryLabel = nullptr;
 	
 };
 

Modules/memory/swapMemoryChart.h

@@ -35,7 +35,7 @@ public:
 	/**
 	 * Initialize the list view item and task.
 	 */
-	SwapMemoryChart(QWidget* parent = nullptr);
+        explicit SwapMemoryChart(QWidget* parent = nullptr);
 	
 
 protected:

Modules/memory/totalMemoryChart.h

@@ -35,7 +35,7 @@ public:
 	/**
 	 * Initialize the list view item and task.
 	 */
-	TotalMemoryChart(QWidget* parent = nullptr);
+        explicit TotalMemoryChart(QWidget* parent = nullptr);
 	
 
 protected:

infokcmmodel.h

@@ -51,7 +51,7 @@ class InfoKcmModel : public QAbstractItemModel
         *
         * @param parent objects parent
         */
-        InfoKcmModel(QObject *parent);
+        explicit InfoKcmModel(QObject *parent);
 
         ~InfoKcmModel();
 

infokcmproxymodel.h

@@ -41,7 +41,7 @@ class InfoKcmProxyModel : public QSortFilterProxyModel
         *
         * @param parent objects parent
         */
-        InfoKcmProxyModel(QObject *parent);
+        explicit InfoKcmProxyModel(QObject *parent);
 
         /**
         * Check if left item is less than right item

sidepanel.h

@@ -49,7 +49,7 @@ class SidePanel : public QTreeView
         *
         * @param parent objects parent
         */
-        SidePanel(QWidget *parent);
+        explicit SidePanel(QWidget *parent);
 
         /**
         * Destory SidePanel object