view Source/Display/KeyboardDisplay.h @ 20:dfff66c07936

Lots of minor changes to support building on Visual Studio. A few MSVC-specific #ifdefs to eliminate things Visual Studio doesn't like. This version now compiles on Windows (provided liblo, Juce and pthread are present) but the TouchKeys device support is not yet enabled. Also, the code now needs to be re-checked on Mac and Linux.

/*
  TouchKeys: multi-touch musical keyboard control software
  Copyright (c) 2013 Andrew McPherson

  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 3 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.  If not, see <http://www.gnu.org/licenses/>.
 
  =====================================================================

  KeyboardDisplay.h: displays the keyboard state, including active MIDI
  notes and current touch position and size.
*/

#ifndef KEYBOARD_DISPLAY_H
#define KEYBOARD_DISPLAY_H

#include <iostream>
#include <map>
//#include <OpenGL/gl.h>
#include "../JuceLibraryCode/JuceHeader.h"
#include "../TouchKeys/KeyTouchFrame.h"
#include "OpenGLDisplayBase.h"


// This class uses OpenGL to implement the actual drawing of the piano keyboard graphics.
// Graphics include the current state of each key and the touches on the surface.

class KeyboardDisplay : public OpenGLDisplayBase {
	// Internal data structures and constants
protected:
    // Display dimensions, normalized to the width of one white key
 
    static const float kWhiteKeyFrontWidth;
    static const float kBlackKeyWidth;
    static const float kWhiteKeyFrontLength;
    static const float kWhiteKeyBackLength;
    static const float kBlackKeyLength;
    static const float kInterKeySpacing;
    static const float kAnalogSliderVerticalSpacing;
    static const float kAnalogSliderLength;
    static const float kAnalogSliderWidth;
    static const float kAnalogSliderMinimumValue;
    static const float kAnalogSliderMaximumValue;
    static const float kAnalogSliderZeroLocation;
    static const float kAnalogSliderOneLocation;
    
    // Individual geometry for C, D, E, F, G, A, B, c'
    
    static const float kWhiteKeyBackOffsets[9];
    static const float kWhiteKeyBackWidths[9];
    
    // Display margins
    
    static const float kDisplaySideMargin;
    static const float kDisplayBottomMargin;
    static const float kDisplayTopMargin;
    
    // Key shape constants
    
    static const int kShapeForNote[12];
    static const int kWhiteToChromatic[7];
    static const float kWhiteKeyFrontBackCutoff;
    
    // Touch constants
    static const float kDisplayMinTouchSize;
    static const float kDisplayTouchSizeScaler;
    
    
	typedef struct {
        bool  active;
		float locH;
		float locV1;
		float locV2;
		float locV3;
		float size1;
		float size2;
		float size3;
	} TouchInfo;
	
	typedef struct {
		float x;
		float y;
	} Point;
	
public:
	KeyboardDisplay();
    virtual ~KeyboardDisplay() {}
	
	// Setup methods for display size and keyboard range
	void setKeyboardRange(int lowest, int highest);
	float keyboardAspectRatio() { return totalDisplayWidth_ / totalDisplayHeight_; }
	virtual void setDisplaySize(float width, float height);
	
	// Drawing methods
	virtual bool needsRender() { return needsUpdate_; }
	virtual void render();
	
	// Interaction methods
	virtual void mouseDown(float x, float y);
	virtual void mouseDragged(float x, float y);
	virtual void mouseUp(float x, float y);
	virtual void rightMouseDown(float x, float y);
	virtual void rightMouseDragged(float x, float y);
	virtual void rightMouseUp(float x, float y);
	
	// Take action associated with clicking a key.  These are called within the mouse
	// methods but may also be called externally.
	virtual void keyClicked(int key);
	virtual void keyRightClicked(int key);
	
	// State-change methods
	void setTouchForKey(int key, const KeyTouchFrame& touch);
	void clearTouchForKey(int key);
	void clearAllTouches();
    void setAnalogCalibrationStatusForKey(int key, bool isCalibrated);
	void setAnalogValueForKey(int key, float value);
    void clearAnalogData();
    void setMidiActive(int key, bool active);
    void clearMidiData();
    
    void setAnalogSensorsPresent(bool present) { analogSensorsPresent_ = present; }
	void setTouchSensorPresentForKey(int key, bool present);
	void setTouchSensingEnabled(bool enabled);
	
protected:
	void drawWhiteKey(float x, float y, int shape, bool first, bool last, bool highlighted);
	void drawBlackKey(float x, float y, bool highlighted);
	
	void drawWhiteTouch(float x, float y, int shape, float touchLocH, float touchLocV, float touchSize);
	void drawBlackTouch(float x, float y, float touchLocH, float touchLocV, float touchSize);
    
    void drawAnalogSlider(float x, float y, bool calibrated, bool whiteKey, float value);
	
	// Indicate the shape of the given MIDI note.  0-6 for white keys C-B, -1 for black keys.
	// We handle unusual shaped keys at the top or bottom of the keyboard separately.
	
	int keyShape(int key) { 
		if(key < 0) return -1;
		return kShapeForNote[key % 12]; 
	}
	
	void refreshViewport();
	
	// Conversion from internal coordinate space to external pixel values and back
	Point screenToInternal(Point& inPoint);
	Point internalToScreen(Point& inPoint);
	
	// Figure out which key (if any) the current point corresponds to
	int keyForLocation(Point& internalPoint);
		
protected:
	
	int lowestMidiNote_, highestMidiNote_;			// Which keys should be displayed (use MIDI note numbers)	
	float totalDisplayWidth_, totalDisplayHeight_;	// Size of the internal view (centered around origin)
    float displayPixelWidth_, displayPixelHeight_;	// Pixel resolution of the surrounding window
	bool needsUpdate_;								// Whether the keyboard should be redrawn
	int currentHighlightedKey_;						// What key is being clicked on at the moment
	bool touchSensingEnabled_;						// Whether touch-sensitive keys are being used
	bool touchSensingPresentOnKey_[128];			// Whether the key with this MIDI note has a touch sensor
    
    bool analogSensorsPresent_;                     // Whether the given device has analog sensors at all
    bool analogValueIsCalibratedForKey_[128];       // Whether the analog sensor is calibrated on this key
    float analogValueForKey_[128];                  // Latest analog sensor value for each key
    bool midiActiveForKey_[128];                    // Whether the MIDI note is on for each key
	
    TouchInfo currentTouches_[128];                 // Touch data for each key
    TouchInfo currentTouchesMirror_[128];           // Mirror of the above, used for active display
	//std::map<int, TouchInfo> currentTouches_;		// Collection of current touch data
	CriticalSection displayMutex_;					// Synchronize access between data and display threads
};

#endif /* KEYBOARD_DISPLAY_H */