fix: cppcheck错误警告修改

单参数构造函数添加explicit关键字，局部变量声明

Log: 修复cppcheck错误及警告
Change-Id: I187ec230376c3f72488e13509b87bcfdb5dd90c5
(cherry picked from commit 3ccc478)
(cherry picked from commit f6c6854)

examples/dnd-example/dnd-test-client.cpp

@@ -25,7 +25,7 @@ class DropArea : public QFrame
 {
     Q_OBJECT
 public:
-    DropArea(QString s)
+    explicit DropArea(QString s)
         : lb(new QLabel(s, this))
         , le(new QLineEdit(this))
     {
@@ -76,8 +76,8 @@ int main(int argc, char **argv)
     lo->addWidget(new DropArea("area 51"));
     lo->addWidget(new DropArea("area 61"));
 
-    QProgressBar pp;
-    p = &pp;
+    QScopedPointer<QProgressBar> pp = new QProgressBar();
+    p = pp.data();
     p->setMinimum(0);
     p->setMaximum(100);
 

examples/test-taskbar/testtaskbarwindow.h

@@ -45,7 +45,7 @@ class TestTaskbarWindow : public QWidget
     Q_OBJECT
 
 public:
-    TestTaskbarWindow(QWidget *parent = nullptr);
+    explicit TestTaskbarWindow(QWidget *parent = nullptr);
     ~TestTaskbarWindow();
 
 protected:

src/filedrag/dfiledragclient.cpp

@@ -50,7 +50,7 @@ public Q_SLOTS:
 
 class DFileDragClientPrivate : DCORE_NAMESPACE::DObjectPrivate
 {
-    DFileDragClientPrivate(DFileDragClient *q)
+    explicit DFileDragClientPrivate(DFileDragClient *q)
         : DCORE_NAMESPACE::DObjectPrivate(q) {}
     QUuid uuid;
     QString service;

src/filedrag/dfiledragserver.cpp

@@ -42,7 +42,7 @@ class DFileDragServerPrivate : public DCORE_NAMESPACE::DObjectPrivate
     QMap<QString, QVariant> data;
     QUuid uuid;
 
-    DFileDragServerPrivate(DFileDragServer *q);
+    explicit DFileDragServerPrivate(DFileDragServer *q);
     ~DFileDragServerPrivate();
 
     void writeMimeData(QMimeData *dest);

src/kernel/dforeignwindow.cpp

@@ -40,7 +40,7 @@ DEFINE_CONST_CHAR(ProcessId);
 class DForeignWindowPrivate : public DTK_CORE_NAMESPACE::DObjectPrivate
 {
 public:
-    DForeignWindowPrivate(DForeignWindow *qq)
+    explicit DForeignWindowPrivate(DForeignWindow *qq)
         : DObjectPrivate(qq) {}
 };
 

src/kernel/dpalette.cpp

@@ -30,7 +30,7 @@ struct DPaletteData : public QSharedData
 class DPalettePrivate
 {
 public:
-    DPalettePrivate(const QSharedDataPointer<DPaletteData> &d)
+    explicit DPalettePrivate(const QSharedDataPointer<DPaletteData> &d)
         : data(d)
     {
 

src/kernel/dwindowgroupleader.cpp

@@ -38,7 +38,7 @@ DEFINE_CONST_CHAR(clientLeader);
 class DWindowGroupLeaderPrivate
 {
 public:
-    DWindowGroupLeaderPrivate(quint32 groupLeader)
+    explicit DWindowGroupLeaderPrivate(quint32 groupLeader)
         : groupLeader(groupLeader) {
         QFunctionPointer clientLeaderFun = qApp->platformFunction(_clientLeader);
 

src/kernel/dwindowmanagerhelper.cpp

@@ -141,7 +141,7 @@ static bool connectWindowMotifWMHintsChanged(QObject *object, std::function<void
 class DWindowManagerHelperPrivate : public DTK_CORE_NAMESPACE::DObjectPrivate
 {
 public:
-    DWindowManagerHelperPrivate(DWindowManagerHelper *qq)
+    explicit DWindowManagerHelperPrivate(DWindowManagerHelper *qq)
         : DObjectPrivate(qq) {}
 
     mutable QList<DForeignWindow *> windowList;

src/util/dsvgrenderer.cpp

@@ -101,7 +101,7 @@ class RSvg
 class DSvgRendererPrivate : public DObjectPrivate
 {
 public:
-    DSvgRendererPrivate(DObject *qq);
+    explicit DSvgRendererPrivate(DObject *qq);
 
     QImage getImage(const QSize &size, const QString &elementId) const;
 

src/util/dsvgrenderer.h

@@ -35,7 +35,7 @@ class DSvgRenderer : public QObject, public DTK_CORE_NAMESPACE::DObject
 {
     Q_PROPERTY(QRectF viewBox READ viewBoxF WRITE setViewBox)
 public:
-    DSvgRenderer(QObject *parent = Q_NULLPTR);
+    explicit DSvgRenderer(QObject *parent = Q_NULLPTR);
     DSvgRenderer(const QString &filename, QObject *parent = Q_NULLPTR);
     DSvgRenderer(const QByteArray &contents, QObject *parent = Q_NULLPTR);
     ~DSvgRenderer();

src/util/dtaskbarcontrol.h

@@ -37,7 +37,7 @@ class DTaskbarControl : public QObject, public DTK_CORE_NAMESPACE::DObject
     Q_OBJECT
 
 public:
-    DTaskbarControl(QObject *parent = nullptr);
+    explicit DTaskbarControl(QObject *parent = nullptr);
     ~DTaskbarControl();
 
     void setProgress(bool progressVisible, double progress);

src/util/dthumbnailprovider.cpp

@@ -52,7 +52,7 @@ inline QByteArray dataToMd5Hex(const QByteArray &data)
 class DThumbnailProviderPrivate : public DTK_CORE_NAMESPACE::DObjectPrivate
 {
 public:
-    DThumbnailProviderPrivate(DThumbnailProvider *qq);
+    explicit DThumbnailProviderPrivate(DThumbnailProvider *qq);
 
     void init();