LcdWidget: new class for displaying numbers in LCD style
Code based on LcdSpinBox implementation.
This commit is contained in:
Tobias Doerffel
87
include/LcdWidget.h
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87
include/LcdWidget.h
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/*
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* LcdWidget.h - a widget for displaying numbers in LCD style
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*
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* Copyright (c) 2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _LCD_WIDGET_H
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#define _LCD_WIDGET_H
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#include <QtCore/QMap>
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#include <QtGui/QWidget>
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#include "export.h"
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class EXPORT LcdWidget : public QWidget
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{
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Q_OBJECT
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public:
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LcdWidget( int numDigits, QWidget* parent, const QString& name = QString::null );
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LcdWidget( int numDigits, const QString& style, QWidget* parent, const QString& name = QString::null );
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virtual ~LcdWidget();
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void setValue( int value );
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void setLabel( const QString& label );
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void addTextForValue( int value, const QString& text )
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{
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m_textForValue[value] = text;
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update();
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}
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public slots:
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virtual void setMarginWidth( int _width );
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protected:
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virtual void paintEvent( QPaintEvent * _me );
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virtual void updateSize();
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int cellHeight() const
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{
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return m_cellHeight;
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}
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private:
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static const int charsPerPixmap = 12;
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QMap<int, QString> m_textForValue;
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QString m_display;
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QString m_label;
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QPixmap* m_lcdPixmap;
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int m_cellWidth;
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int m_cellHeight;
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int m_numDigits;
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int m_marginWidth;
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} ;
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#endif
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246
src/gui/widgets/LcdWidget.cpp
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246
src/gui/widgets/LcdWidget.cpp
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@@ -0,0 +1,246 @@
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/*
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* LcdWidget.cpp - a widget for displaying numbers in LCD style
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*
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* Copyright (c) 2005-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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* Copyright (c) 2008 Paul Giblock <pgllama/at/gmail.com>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include <QtGui/QApplication>
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#include <QtGui/QLabel>
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#include <QtGui/QMouseEvent>
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#include <QtGui/QPainter>
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#include <QtGui/QFontMetrics>
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#include <QtGui/QStyleOptionFrameV2>
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#include "LcdWidget.h"
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#include "engine.h"
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#include "embed.h"
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#include "gui_templates.h"
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#include "MainWindow.h"
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LcdWidget::LcdWidget( int numDigits, QWidget* parent, const QString& name ) :
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QWidget( parent ),
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m_label(),
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m_numDigits( numDigits )
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{
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setEnabled( true );
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setWindowTitle( name );
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m_lcdPixmap = new QPixmap( embed::getIconPixmap( "lcd_19green" ) );
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m_cellWidth = m_lcdPixmap->size().width() / LcdWidget::charsPerPixmap;
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m_cellHeight = m_lcdPixmap->size().height() / 2;
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m_marginWidth = m_cellWidth / 2;
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updateSize();
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}
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LcdWidget::LcdWidget( int numDigits, const QString& style, QWidget* parent, const QString& name ) :
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QWidget( parent ),
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m_label(),
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m_numDigits( numDigits )
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{
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setEnabled( true );
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setWindowTitle( name );
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// We should make a factory for these or something.
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m_lcdPixmap = new QPixmap( embed::getIconPixmap( QString( "lcd_" + style ).toUtf8().constData() ) );
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m_cellWidth = m_lcdPixmap->size().width() / LcdWidget::charsPerPixmap;
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m_cellHeight = m_lcdPixmap->size().height() / 2;
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m_marginWidth = m_cellWidth / 2;
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updateSize();
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}
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LcdWidget::~LcdWidget()
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{
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delete m_lcdPixmap;
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}
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void LcdWidget::setValue( int value )
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{
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QString s = m_textForValue[value];
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if( s.isEmpty() )
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{
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s = QString::number( value );
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// TODO: if pad == true
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/*
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while( (int) s.length() < m_numDigits )
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{
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s = "0" + s;
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}
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*/
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}
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m_display = s;
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update();
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}
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void LcdWidget::paintEvent( QPaintEvent* )
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{
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QPainter p( this );
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QSize cellSize( m_cellWidth, m_cellHeight );
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QRect cellRect( 0, 0, m_cellWidth, m_cellHeight );
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int margin = 1; // QStyle::PM_DefaultFrameWidth;
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//int lcdWidth = m_cellWidth * m_numDigits + (margin*m_marginWidth)*2;
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// p.translate( width() / 2 - lcdWidth / 2, 0 );
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p.save();
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p.translate( margin, margin );
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// Left Margin
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p.drawPixmap( cellRect, *m_lcdPixmap,
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QRect( QPoint( charsPerPixmap*m_cellWidth,
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isEnabled()?0:m_cellHeight ),
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cellSize ) );
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p.translate( m_marginWidth, 0 );
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// Padding
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for( int i=0; i < m_numDigits - m_display.length(); i++ )
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{
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p.drawPixmap( cellRect, *m_lcdPixmap,
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QRect( QPoint( 10 * m_cellWidth, isEnabled()?0:m_cellHeight) , cellSize ) );
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p.translate( m_cellWidth, 0 );
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}
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// Digits
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for( int i=0; i < m_display.length(); i++ )
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{
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int val = m_display[i].digitValue();
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if( val < 0 )
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{
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if( m_display[i] == '-' )
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val = 11;
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else
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val = 10;
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}
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p.drawPixmap( cellRect, *m_lcdPixmap,
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QRect( QPoint( val*m_cellWidth,
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isEnabled()?0:m_cellHeight ),
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cellSize ) );
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p.translate( m_cellWidth, 0 );
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}
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// Right Margin
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p.drawPixmap( QRect( 0, 0, m_marginWidth-1, m_cellHeight ), *m_lcdPixmap,
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QRect( charsPerPixmap*m_cellWidth, isEnabled()?0:m_cellHeight,
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m_cellWidth / 2, m_cellHeight ) );
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p.restore();
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// Border
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QStyleOptionFrame opt;
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opt.initFrom( this );
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opt.state = QStyle::State_Sunken;
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opt.rect = QRect( 0, 0, m_cellWidth * m_numDigits + (margin+m_marginWidth)*2 - 1,
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m_cellHeight + (margin*2) );
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style()->drawPrimitive( QStyle::PE_Frame, &opt, &p, this );
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p.resetTransform();
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// Label
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if( !m_label.isEmpty() )
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{
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p.setFont( pointSize<6>( p.font() ) );
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p.setPen( QColor( 64, 64, 64 ) );
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p.drawText( width() / 2 -
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p.fontMetrics().width( m_label ) / 2 + 1,
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height(), m_label );
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p.setPen( QColor( 255, 255, 255 ) );
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p.drawText( width() / 2 -
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p.fontMetrics().width( m_label ) / 2,
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height() - 1, m_label );
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}
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}
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void LcdWidget::setLabel( const QString & _txt )
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{
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m_label = _txt;
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updateSize();
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}
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void LcdWidget::setMarginWidth( int _width )
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{
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m_marginWidth = _width;
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updateSize();
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}
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void LcdWidget::updateSize()
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{
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int margin = 1;
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if (m_label.isEmpty()) {
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setFixedSize( m_cellWidth * m_numDigits + 2*(margin+m_marginWidth),
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m_cellHeight + (2*margin) );
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}
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else {
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setFixedSize( qMax<int>(
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m_cellWidth * m_numDigits + 2*(margin+m_marginWidth),
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QFontMetrics( pointSize<6>( font() ) ).width( m_label ) ),
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m_cellHeight + (2*margin) + 10 );
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}
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update();
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}
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#include "moc_LcdWidget.cxx"
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