Showing Knob value on mouse over (#6835)

* Showing Knob value on mouse over

* Correcting minors source code issues

* Correcting double QTimer include

* Removing blank lines

* Removing space and add one

* Update src/gui/widgets/SimpleTextFloat.cpp

Co-authored-by: saker <sakertooth@gmail.com>

* Correcting QTimer

* Remove a parameter that has the default value

---------

Co-authored-by: saker <sakertooth@gmail.com>

include/Knob.h

@@ -144,6 +144,9 @@ protected:
 	void wheelEvent( QWheelEvent * _me ) override;
 	void changeEvent(QEvent * ev) override;
 
+	void enterEvent(QEvent *event) override;
+	void leaveEvent(QEvent *event) override;
+
 	virtual float getValue( const QPoint & _p );
 
 private slots:
@@ -160,6 +163,7 @@ private:
 						float _innerRadius = 1) const;
 
 	void drawKnob( QPainter * _p );
+	void showTextFloat(int msecBeforeDisplay, int msecDisplayTime);
 	void setPosition( const QPoint & _p );
 	bool updateAngle();
 

include/SimpleTextFloat.h

@@ -31,6 +31,7 @@
 #include "lmms_export.h"
 
 class QLabel;
+class QTimer;
 
 namespace lmms::gui
 {
@@ -44,6 +45,8 @@ public:
 
 	void setText(const QString & text);
 
+	void showWithDelay(int msecBeforeDisplay, int msecDisplayTime);
+
 	void setVisibilityTimeOut(int msecs);
 
 	void moveGlobal(QWidget * w, const QPoint & offset)
@@ -51,11 +54,14 @@ public:
 		move(w->mapToGlobal(QPoint(0, 0)) + offset);
 	}
 
+	void hide();
+
 private:
 	QLabel * m_textLabel;
+	QTimer * m_showTimer;
+	QTimer * m_hideTimer;
 };
 
-
 } // namespace lmms::gui
 
 #endif