optimize datetime plugin

Change-Id: Id188ab920cd66ee2c91215c9877cc3edabd0fa1e

frame/item/pluginsitem.cpp

@@ -9,16 +9,10 @@ PluginsItem::PluginsItem(PluginsItemInterface* const inter, QWidget *parent)
     : DockItem(Plugins, parent),
       m_inter(inter)
 {
-//    QBoxLayout *layout = new QBoxLayout;
-//    layout->addWidget(m_inter->);
-}
+    QBoxLayout *layout = new QHBoxLayout;
+    layout->addWidget(m_inter->centeralWidget());
+    layout->setSpacing(0);
+    layout->setMargin(0);
 
-void PluginsItem::paintEvent(QPaintEvent *e)
-{
-    DockItem::paintEvent(e);
-
-    QPainter painter(this);
-    painter.fillRect(rect().marginsRemoved(QMargins(3, 3, 3, 3)), Qt::cyan);
-    painter.setPen(Qt::red);
-    painter.drawText(rect(), m_inter->name());
+    setLayout(layout);
 }

frame/item/pluginsitem.h

@@ -11,9 +11,6 @@ class PluginsItem : public DockItem
 public:
     explicit PluginsItem(PluginsItemInterface* const inter, QWidget *parent = 0);
 
-private:
-    void paintEvent(QPaintEvent *e);
-
 private:
     PluginsItemInterface* const m_inter;
 };

interfaces/pluginsiteminterface.h

@@ -1,13 +1,15 @@
 #ifndef PLUGINSITEMINTERFACE_H
 #define PLUGINSITEMINTERFACE_H
 
-class QString;
+#include <QtCore>
+
 class PluginsItemInterface
 {
 public:
     virtual ~PluginsItemInterface() {}
 
     virtual const QString name() = 0;
+    virtual QWidget *centeralWidget() = 0;
 };
 
 QT_BEGIN_NAMESPACE

plugins/datetime/datetimeplugin.cpp

@@ -1,12 +1,37 @@
 #include "datetimeplugin.h"
 
 DatetimePlugin::DatetimePlugin(QObject *parent)
-    : QObject(parent)
+    : QObject(parent),
+      m_timeLabel(new QLabel),
+      m_refershTimer(new QTimer(this))
 {
+    m_timeLabel->setStyleSheet("color:red;");
 
+    m_refershTimer->setInterval(1000);
+    m_refershTimer->start();
+
+    connect(m_refershTimer, &QTimer::timeout, this, &DatetimePlugin::refershTime);
+}
+
+DatetimePlugin::~DatetimePlugin()
+{
+    delete m_timeLabel;
 }
 
 const QString DatetimePlugin::name()
 {
     return "datetime";
 }
+
+QWidget *DatetimePlugin::centeralWidget()
+{
+    return m_timeLabel;
+}
+
+void DatetimePlugin::refershTime()
+{
+    const QString text = QTime::currentTime().toString(tr("HH:mm"));
+
+    if (m_timeLabel->text() != text)
+        m_timeLabel->setText(text);
+}

plugins/datetime/datetimeplugin.h

@@ -1,10 +1,11 @@
 #ifndef DATETIMEPLUGIN_H
 #define DATETIMEPLUGIN_H
 
-#include <QObject>
-
 #include "pluginsiteminterface.h"
 
+#include <QLabel>
+#include <QTimer>
+
 class DatetimePlugin : public QObject, PluginsItemInterface
 {
     Q_OBJECT
@@ -13,8 +14,17 @@ class DatetimePlugin : public QObject, PluginsItemInterface
 
 public:
     explicit DatetimePlugin(QObject *parent = 0);
+    ~DatetimePlugin();
 
     const QString name();
+    QWidget *centeralWidget();
+
+private slots:
+    void refershTime();
+
+private:
+    QLabel *m_timeLabel;
+    QTimer *m_refershTimer;
 };
 
 #endif // DATETIMEPLUGIN_H