Add LcdFloatSpinBox (extracted from microtonal PR) (#5865)

* Add changes extracted from microtonal PR

* Apply suggestions from code review

Co-authored-by: IanCaio <iancaio_dev@hotmail.com>

* Apply suggestions from code review

(adding oneliner spaces)

Co-authored-by: IanCaio <iancaio_dev@hotmail.com>

* Update src/gui/widgets/LcdFloatSpinBox.cpp

Co-authored-by: Hyunjin Song <tteu.ingog@gmail.com>

* Apply suggestions from code review

Co-authored-by: Dominic Clark <mrdomclark@gmail.com>

* Implement suggestions from review

* Reorder constructor parameters, remove old code for cursor movement and hiding from Lcd*SpinBoxes

* Apply suggestions from code review

Co-authored-by: IanCaio <iancaio_dev@hotmail.com>

* Fix right margin width in seamless mode

* Add explanation to border drawing code

Co-authored-by: IanCaio <iancaio_dev@hotmail.com>
Co-authored-by: Hyunjin Song <tteu.ingog@gmail.com>
Co-authored-by: Dominic Clark <mrdomclark@gmail.com>

include/LcdFloatSpinBox.h

@@ -0,0 +1,83 @@
+/*
+ * LcdFloatSpinBox.h - class LcdFloatSpinBox (LcdSpinBox for floats)
+ *
+ * Copyright (c) 2005-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ * Copyright (c) 2020 Martin Pavelek <he29.HS/at/gmail.com>
+ *
+ * This file is part of LMMS - https://lmms.io
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#ifndef LCD_FLOATSPINBOX_H
+#define LCD_FLOATSPINBOX_H
+
+#include <QString>
+
+#include "LcdWidget.h"
+#include "AutomatableModelView.h"
+
+
+class LMMS_EXPORT LcdFloatSpinBox : public QWidget, public FloatModelView
+{
+	Q_OBJECT
+public:
+	LcdFloatSpinBox(int numWhole, int numFrac, const QString& name = QString(), QWidget* parent = nullptr);
+	LcdFloatSpinBox(int numWhole, int numFrac, const QString& style, const QString& name, QWidget* parent = nullptr);
+
+	void modelChanged() override
+	{
+		ModelView::modelChanged();
+		update();
+	}
+
+	void setLabel(const QString &label) { m_label = label; }
+
+public slots:
+	virtual void update();
+
+protected:
+	void contextMenuEvent(QContextMenuEvent *me) override;
+	void mousePressEvent(QMouseEvent *me) override;
+	void mouseMoveEvent(QMouseEvent *me) override;
+	void mouseReleaseEvent(QMouseEvent *me) override;
+	void wheelEvent(QWheelEvent *we) override;
+	void mouseDoubleClickEvent(QMouseEvent *me) override;
+	void paintEvent(QPaintEvent *pe) override;
+
+private:
+	void layoutSetup(const QString &style = QString("19green"));
+	void enterValue();
+	float getStep() const;
+
+	LcdWidget m_wholeDisplay;
+	LcdWidget m_fractionDisplay;
+	bool m_mouseMoving;
+	bool m_intStep;
+	QPoint m_origMousePos;
+	int m_displayOffset;
+	QString m_label;
+
+signals:
+	void manualChange();
+
+};
+
+using LcdFloatSpinBoxModel = FloatModel;
+
+#endif

include/LcdWidget.h

@@ -40,9 +40,10 @@ class LMMS_EXPORT LcdWidget : public QWidget
 	Q_PROPERTY( QColor textShadowColor READ textShadowColor WRITE setTextShadowColor )
 	
 public:
-	LcdWidget( QWidget* parent, const QString& name = QString() );
-	LcdWidget( int numDigits, QWidget* parent, const QString& name = QString() );
-	LcdWidget( int numDigits, const QString& style, QWidget* parent, const QString& name = QString() );
+	explicit LcdWidget(QWidget* parent, const QString& name = QString(), bool leadingZero = false);
+	LcdWidget(int numDigits, QWidget* parent, const QString& name = QString(), bool leadingZero = false);
+	LcdWidget(int numDigits, const QString& style, QWidget* parent, const QString& name = QString(),
+		bool leadingZero = false);
 
 	virtual ~LcdWidget();
 
@@ -66,6 +67,15 @@ public:
 	QColor textShadowColor() const;
 	void setTextShadowColor( const QColor & c );
 
+	int cellHeight() const { return m_cellHeight; }
+
+	void setSeamless(bool left, bool right)
+	{
+		m_seamlessLeft = left;
+		m_seamlessRight = right;
+		updateSize();
+	}
+
 public slots:
 	virtual void setMarginWidth( int width );
 
@@ -75,11 +85,6 @@ protected:
 
 	virtual void updateSize();
 
-	int cellHeight() const
-	{
-		return m_cellHeight;
-	}
-
 
 private:
 
@@ -99,9 +104,12 @@ private:
 	int m_cellHeight;
 	int m_numDigits;
 	int m_marginWidth;
+	bool m_seamlessLeft;
+	bool m_seamlessRight;
+	bool m_leadingZero;
 
 	void initUi( const QString& name, const QString &style ); //!< to be called by ctors
 
-} ;
+};
 
 #endif