/*
PianoKeys.cpp
This class represents the implementation of the CPianoKey derived
classes.
Copyright (c) 2008 Leslie Sanford
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
Contact: Leslie Sanford (jabberdabber@hotmail.com)
Last modified: 01/23/2008
*/
//---------------------------------------------------------------------
// Dependencies
//---------------------------------------------------------------------
#include <afxwin.h>
#include "PianoCtrl.h"
//---------------------------------------------------------------------
// Constants
//---------------------------------------------------------------------
// The width of the black keys as a percentage of the width of the
// white keys
const double CPianoCtrl::CPianoKey::BLACK_KEY_OFFSET = 0.7;
// The number of units natural keys use in their widest part.
const int CPianoCtrl::CPianoKey::UNIT_PER_NAT_KEY = 3;
//---------------------------------------------------------------------
// CWhiteKeyLeft class implementation
//---------------------------------------------------------------------
// Constructor
CPianoCtrl::CWhiteKeyLeft::CWhiteKeyLeft(double UnitLength, int Width,
double Position)
{
// Initialize upper portion of this key
m_UpperRect.top = 0;
m_UpperRect.bottom = static_cast<long>(Width * BLACK_KEY_OFFSET);
m_UpperRect.left = static_cast<long>(Position);
m_UpperRect.right = static_cast<long>
(Position + UnitLength * (UNIT_PER_NAT_KEY - 1));
// Initialize lower portion of this key
m_LowerRect.top = static_cast<long>(Width * BLACK_KEY_OFFSET);
m_LowerRect.bottom = Width - 1;
m_LowerRect.left = static_cast<long>(Position);
m_LowerRect.right = static_cast<long>
(Position + UnitLength * UNIT_PER_NAT_KEY);
}
// Hit detection
bool CPianoCtrl::CWhiteKeyLeft::IsPointInKey(const CPoint &pt) const
{
return (IsPointInRect(pt, m_UpperRect) ||
IsPointInRect(pt, m_LowerRect));
}
// Turns note on
void CPianoCtrl::CWhiteKeyLeft::NoteOn(COLORREF NoteOnColor,
CRect &Rect)
{
m_NoteOnFlag = true;
m_NoteOnColor = NoteOnColor;
CalcInvalidRect(Rect);
}
// Turns note off
void CPianoCtrl::CWhiteKeyLeft::NoteOff(CRect &Rect)
{
m_NoteOnFlag = false;
CalcInvalidRect(Rect);
}
// Paints the key
void CPianoCtrl::CWhiteKeyLeft::Paint(CDC *dc)
{
//
// Fill key
//
// Note is on
if(m_NoteOnFlag)
{
dc->FillSolidRect(&m_UpperRect, m_NoteOnColor);
dc->FillSolidRect(&m_LowerRect, m_NoteOnColor);
}
// Note is off
else
{
dc->FillSolidRect(&m_UpperRect, RGB(250, 250, 250));
dc->FillSolidRect(&m_LowerRect, RGB(250, 250, 250));
}
dc->SelectStockObject(BLACK_PEN);
//
// Draw border
//
// Left side
dc->MoveTo(m_UpperRect.left, m_UpperRect.top);
dc->LineTo(m_UpperRect.left, m_LowerRect.bottom);
// Bottom
dc->LineTo(m_LowerRect.right, m_LowerRect.bottom);
// Right side
dc->LineTo(m_LowerRect.right, m_LowerRect.top);
dc->LineTo(m_UpperRect.right, m_UpperRect.bottom);
dc->LineTo(m_UpperRect.right, m_UpperRect.top);
// Top
dc->LineTo(m_UpperRect.left, m_UpperRect.top);
}
// Calculate the rectangular area to invalidate for this key
void CPianoCtrl::CWhiteKeyLeft::CalcInvalidRect(CRect &Rect)
{
Rect.top = m_UpperRect.top;
Rect.bottom = m_LowerRect.bottom;
Rect.left = m_UpperRect.left;
Rect.right = m_LowerRect.right;
}
//---------------------------------------------------------------------
// CWhiteKeyMiddle class implementation
//---------------------------------------------------------------------
// Constructor
CPianoCtrl::CWhiteKeyMiddle::CWhiteKeyMiddle(double UnitLength,
int Width, double Position)
{
// Initialize upper portion of this key
m_UpperRect.top = 0;
m_UpperRect.bottom = static_cast<long>(Width * BLACK_KEY_OFFSET);
m_UpperRect.left = static_cast<long>(Position + UnitLength);
m_UpperRect.right = static_cast<long>
(Position + UnitLength * (UNIT_PER_NAT_KEY - 1));
// Initialize lower portion of this key
m_LowerRect.top = static_cast<long>(Width * BLACK_KEY_OFFSET);
m_LowerRect.bottom = Width - 1;
m_LowerRect.left = static_cast<long>(Position);
m_LowerRect.right = static_cast<long>
(Position + UnitLength * UNIT_PER_NAT_KEY);
}
// Hit detection
bool CPianoCtrl::CWhiteKeyMiddle::IsPointInKey(const CPoint &pt) const
{
return (IsPointInRect(pt, m_UpperRect) ||
IsPointInRect(pt, m_LowerRect));
}
// Turns note on
void CPianoCtrl::CWhiteKeyMiddle::NoteOn(COLORREF NoteOnColor,
CRect &Rect)
{
m_NoteOnFlag = true;
m_NoteOnColor = NoteOnColor;
CalcInvalidRect(Rect);
}
// Turns note off
void CPianoCtrl::CWhiteKeyMiddle::NoteOff(CRect &Rect)
{
m_NoteOnFlag = false;
CalcInvalidRect(Rect);
}
// Paints key
void CPianoCtrl::CWhiteKeyMiddle::Paint(CDC *dc)
{
//
// Fill key
//
// Note is on
if(m_NoteOnFlag)
{
dc->FillSolidRect(&m_UpperRect, m_NoteOnColor);
dc->FillSolidRect(&m_LowerRect, m_NoteOnColor);
}
// Note is off
else
{
dc->FillSolidRect(&m_UpperRect, RGB(250, 250, 250));
dc->FillSolidRect(&m_LowerRect, RGB(250, 250, 250));
}
dc->SelectStockObject(BLACK_PEN);
//
// Draw border
//
// Left side
dc->MoveTo(m_UpperRect.left, m_UpperRect.top);
dc->LineTo(m_UpperRect.left, m_UpperRect.bottom);
dc->LineTo(m_LowerRect.left, m_LowerRect.top);
dc->LineTo(m_LowerRect.left, m_LowerRect.bottom);
// Bottom
dc->LineTo(m_LowerRect.right, m_LowerRect.bottom);
// Right side
dc->LineTo(m_LowerRect.right, m_LowerRect.top);
dc->LineTo(m_UpperRect.right, m_UpperRect.bottom);
dc->LineTo(m_UpperRect.right, m_UpperRect.top);
// Top
dc->LineTo(m_UpperRect.left, m_UpperRect.top);
}
// Calculate rectangular area to invalidate for this key
void CPianoCtrl::CWhiteKeyMiddle::CalcInvalidRect(CRect &Rect)
{
Rect.top = m_UpperRect.top;
Rect.bottom = m_LowerRect.bottom;
Rect.left = m_LowerRect.left;
Rect.right = m_LowerRect.right;
}
//---------------------------------------------------------------------
// CWhiteKeyRight class implementation
//---------------------------------------------------------------------
// Constructor
CPianoCtrl::CWhiteKeyRight::CWhiteKeyRight(double UnitLength, int Width,
double Position)
{
// Initialize upper portion of this key
m_UpperRect.top = 0;
m_UpperRect.bottom = static_cast<long>(Width * BLACK_KEY_OFFSET);
m_UpperRect.left = static_cast<long>(Position + UnitLength);
m_UpperRect.right = static_cast<long>
(Position + UnitLength * UNIT_PER_NAT_KEY);
// Initialize lower portion of this key
m_LowerRect.top = static_cast<long>(Width * BLACK_KEY_OFFSET);
m_LowerRect.bottom = Width - 1;
m_LowerRect.left = static_cast<long>(Position);
m_LowerRect.right = static_cast<long>
(Position + UnitLength * UNIT_PER_NAT_KEY);
}
// Hit detection
bool CPianoCtrl::CWhiteKeyRight::IsPointInKey(const CPoint &pt) const
{
return (IsPointInRect(pt, m_UpperRect) ||
IsPointInRect(pt, m_LowerRect));
}
// Turns note on
void CPianoCtrl::CWhiteKeyRight::NoteOn(COLORREF NoteOnColor,
CRect &Rect)
{
m_NoteOnFlag = true;
m_NoteOnColor = NoteOnColor;
CalcInvalidRect(Rect);
}
// Turns note off
void CPianoCtrl::CWhiteKeyRight::NoteOff(CRect &Rect)
{
m_NoteOnFlag = false;
CalcInvalidRect(Rect);
}
// Paints key
void CPianoCtrl::CWhiteKeyRight::Paint(CDC *dc)
{
//
// Fill key
//
// Note is on
if(m_NoteOnFlag)
{
dc->FillSolidRect(&m_UpperRect, m_NoteOnColor);
dc->FillSolidRect(&m_LowerRect, m_NoteOnColor);
}
// Note is off
else
{
dc->FillSolidRect(&m_UpperRect, RGB(250, 250, 250));
dc->FillSolidRect(&m_LowerRect, RGB(250, 250, 250));
}
dc->SelectStockObject(BLACK_PEN);
//
// Draw border
//
// Left side
dc->MoveTo(m_UpperRect.left, m_UpperRect.top);
dc->LineTo(m_UpperRect.left, m_UpperRect.bottom);
dc->LineTo(m_LowerRect.left, m_LowerRect.top);
dc->LineTo(m_LowerRect.left, m_LowerRect.bottom);
// Bottom
dc->LineTo(m_LowerRect.right, m_LowerRect.bottom);
// Right side
dc->LineTo(m_LowerRect.right, m_UpperRect.top);
// Top
dc->LineTo(m_UpperRect.left, m_UpperRect.top);
}
// Calculates rectangular area to invalidate for this key
void CPianoCtrl::CWhiteKeyRight::CalcInvalidRect(CRect &Rect)
{
Rect.top = m_UpperRect.top;
Rect.bottom = m_LowerRect.bottom;
Rect.left = m_LowerRect.left;
Rect.right = m_LowerRect.right;
}
//---------------------------------------------------------------------
// CWhiteKeyFull class implementation
//---------------------------------------------------------------------
// Constructor
CPianoCtrl::CWhiteKeyFull::CWhiteKeyFull(double UnitLength, int Width,
double Position)
{
// Initialize this key's rectangular area
m_Rect.top = 0;
m_Rect.bottom = Width - 1;
m_Rect.left = static_cast<long>(Position);
m_Rect.right =
static_cast<long>(Position + UnitLength * UNIT_PER_NAT_KEY);
}
// Hit detection
bool CPianoCtrl::CWhiteKeyFull::IsPointInKey(const CPoint &pt) const
{
return (IsPointInRect(pt, m_Rect));
}
// Turns note on
void CPianoCtrl::CWhiteKeyFull::NoteOn(COLORREF NoteOnColor, CRect &Rect)
{
m_NoteOnFlag = true;
m_NoteOnColor = NoteOnColor;
Rect = m_Rect;
}
// Turns note off
void CPianoCtrl::CWhiteKeyFull::NoteOff(CRect &Rect)
{
m_NoteOnFlag = false;
Rect = m_Rect;
}
// Paints this key
void CPianoCtrl::CWhiteKeyFull::Paint(CDC *dc)
{
//
// Fill key
//
// Note is on
if(m_NoteOnFlag)
{
dc->FillSolidRect(&m_Rect, m_NoteOnColor);
}
// Note is off
else
{
dc->FillSolidRect(&m_Rect, RGB(250, 250, 250));
}
dc->SelectStockObject(BLACK_PEN);
//
// Draw border
//
// Left side
dc->MoveTo(m_Rect.left, m_Rect.top);
dc->LineTo(m_Rect.left, m_Rect.bottom);
// Bottom
dc->LineTo(m_Rect.right, m_Rect.bottom);
// Right side
dc->LineTo(m_Rect.right, m_Rect.top);
// Top
dc->LineTo(m_Rect.left, m_Rect.top);
}
//---------------------------------------------------------------------
// CBlackKey class implementation
//---------------------------------------------------------------------
// Constructor
CPianoCtrl::CBlackKey::CBlackKey(double UnitLength, int Width,
double Position)
{
// Initialize this key's rectangular area
m_Rect.top = 0;
m_Rect.bottom = static_cast<long>(Width * BLACK_KEY_OFFSET);
m_Rect.left = static_cast<long>(Position);
m_Rect.right = static_cast<long>
(Position + UnitLength * (UNIT_PER_NAT_KEY - 1));
}
// Hit detection
bool CPianoCtrl::CBlackKey::IsPointInKey(const CPoint &pt) const
{
return (IsPointInRect(pt, m_Rect));
}
// Turns note on
void CPianoCtrl::CBlackKey::NoteOn(COLORREF NoteOnColor, CRect &Rect)
{
m_NoteOnFlag = true;
m_NoteOnColor = NoteOnColor;
Rect = m_Rect;
}
// Turns note off
void CPianoCtrl::CBlackKey::NoteOff(CRect &Rect)
{
m_NoteOnFlag = false;
Rect = m_Rect;
}
// Paints this key
void CPianoCtrl::CBlackKey::Paint(CDC *dc)
{
//
// Fill key
//
// Note is on
if(m_NoteOnFlag)
{
dc->FillSolidRect(&m_Rect, m_NoteOnColor);
}
// Note is off
else
{
dc->FillSolidRect(&m_Rect, RGB(0, 0, 0));
}
dc->SelectStockObject(BLACK_PEN);
//
// Draw border
//
// Left side
dc->MoveTo(m_Rect.left, m_Rect.top);
dc->LineTo(m_Rect.left, m_Rect.bottom);
// Bottom
dc->LineTo(m_Rect.right, m_Rect.bottom);
// Right side
dc->LineTo(m_Rect.right, m_Rect.top);
// Top
dc->LineTo(m_Rect.left, m_Rect.top);
}