view view/ViewProxy.h @ 1127:9fb8dfd7ce4c spectrogram-minor-refactor

Fix threshold in spectrogram -- it wasn't working in the last release.
There is a new protocol for this. Formerly the threshold parameter had a
range from -50dB to 0 with the default at -50, and -50 treated internally
as "no threshold". However, there was a hardcoded, hidden internal threshold
for spectrogram colour mapping at -80dB with anything below this being rounded
to zero. Now the threshold parameter has range -81 to -1 with the default
at -80, -81 is treated internally as "no threshold", and there is no hidden
internal threshold. So the default behaviour is the same as before, an
effective -80dB threshold, but it is now possible to change this in both
directions. Sessions reloaded from prior versions may look slightly different
because, if the session says there should be no threshold, there will now
actually be no threshold instead of having the hidden internal one.

Still need to do something in the UI to make it apparent that the -81dB
setting removes the threshold entirely. This is at least no worse than the
previous, also obscured, magic -50dB setting.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef VIEW_PROXY_H
#define VIEW_PROXY_H

#include "layer/LayerGeometryProvider.h"

class ViewProxy : public LayerGeometryProvider
{
public:
    ViewProxy(View *view, int scaleFactor) :
	m_view(view), m_scaleFactor(scaleFactor) { }

    virtual int getId() const {
        return m_view->getId();
    }
    virtual sv_frame_t getStartFrame() const {
	return m_view->getStartFrame();
    }
    virtual sv_frame_t getCentreFrame() const {
	return m_view->getCentreFrame();
    }
    virtual sv_frame_t getEndFrame() const {
	return m_view->getEndFrame();
    }
    virtual int getXForFrame(sv_frame_t frame) const {
        //!!! not actually correct, if frame lies between view's pixels
	return m_scaleFactor * m_view->getXForFrame(frame);
    }
    virtual sv_frame_t getFrameForX(int x) const {
        sv_frame_t f0 = m_view->getFrameForX(x / m_scaleFactor);
        if (m_scaleFactor == 1) return f0;
        sv_frame_t f1 = m_view->getFrameForX((x / m_scaleFactor) + 1);
        return f0 + ((f1 - f0) * (x % m_scaleFactor)) / m_scaleFactor;
    }
    virtual int getXForViewX(int viewx) const {
        return viewx * m_scaleFactor;
    }
    virtual int getViewXForX(int x) const {
        return x / m_scaleFactor;
    }
    virtual sv_frame_t getModelsStartFrame() const {
	return m_view->getModelsStartFrame();
    }
    virtual sv_frame_t getModelsEndFrame() const {
	return m_view->getModelsEndFrame();
    }
    virtual double getYForFrequency(double frequency,
				    double minFreq, double maxFreq, 
                                    bool logarithmic) const {
	return m_scaleFactor *
	    m_view->getYForFrequency(frequency, minFreq, maxFreq, logarithmic);
    }
    virtual double getFrequencyForY(double y, double minFreq, double maxFreq,
				    bool logarithmic) const {
        return m_view->getFrequencyForY
            (y / m_scaleFactor, minFreq, maxFreq, logarithmic);
    }
    virtual int getTextLabelHeight(const Layer *layer, QPainter &paint) const {
	return m_scaleFactor * m_view->getTextLabelHeight(layer, paint);
    }
    virtual bool getValueExtents(QString unit, double &min, double &max,
                                 bool &log) const {
	return m_view->getValueExtents(unit, min, max, log);
    }
    virtual int getZoomLevel() const {
	int z = m_view->getZoomLevel();
//	cerr << "getZoomLevel: from " << z << " to ";
	z = z / m_scaleFactor;
//	cerr << z << endl;
        if (z < 1) z = 1;
	return z;
    }
    virtual QRect getPaintRect() const {
	QRect r = m_view->getPaintRect();
	return QRect(r.x() * m_scaleFactor,
		     r.y() * m_scaleFactor,
		     r.width() * m_scaleFactor,
		     r.height() * m_scaleFactor);
    }
    virtual QSize getPaintSize() const {
        return getPaintRect().size();
    }
    virtual int getPaintWidth() const { 
        return getPaintRect().width();
    }
    virtual int getPaintHeight() const { 
        return getPaintRect().height();
    }
    virtual bool hasLightBackground() const {
	return m_view->hasLightBackground();
    }
    virtual QColor getForeground() const {
	return m_view->getForeground();
    }
    virtual QColor getBackground() const {
	return m_view->getBackground();
    }
    virtual ViewManager *getViewManager() const {
	return m_view->getViewManager();
    }
	
    virtual bool shouldIlluminateLocalFeatures(const Layer *layer,
                                               QPoint &point) const {
        QPoint p;
	bool should = m_view->shouldIlluminateLocalFeatures(layer, p);
        point = QPoint(p.x() * m_scaleFactor, p.y() * m_scaleFactor);
        return should;
    }

    virtual bool shouldShowFeatureLabels() const {
	return m_view->shouldShowFeatureLabels();
    }

    virtual void drawMeasurementRect(QPainter &p, const Layer *layer,
                                     QRect rect, bool focus) const {
	m_view->drawMeasurementRect(p, layer, rect, focus);
    }

    virtual void updatePaintRect(QRect r) {
        m_view->update(r.x() / m_scaleFactor,
                       r.y() / m_scaleFactor,
                       r.width() / m_scaleFactor,
                       r.height() / m_scaleFactor);
    }
    
    virtual View *getView() { return m_view; }
    virtual const View *getView() const { return m_view; }

private:
    View *m_view;
    int m_scaleFactor;
};

#endif