void CPlotter::SetDemodRanges(int FLowCmin, int FLowCmax, int FHiCmin, int FHiCmax, bool symetric)
{
m_FLowCmin=FLowCmin;
m_FLowCmax=FLowCmax;
m_FHiCmin=FHiCmin;
m_FHiCmax=FHiCmax;
m_symetric=symetric;
ClampDemodParameters();
DrawOverlay();
}
//////////////////////////////////////////////////////////////////////
// Called when a mouse wheel is turned
//////////////////////////////////////////////////////////////////////
void CPlotter::wheelEvent(QWheelEvent * event)
{
QPoint pt = event->pos();
int numDegrees = event->delta() / 8;
int numSteps = numDegrees / 15; /** FIXME: Only used for direction **/
/** FIXME: zooming could use some optimisation **/
if (m_CursorCaptured == YAXIS)
{
// Vertical zoom. Wheel down: zoom out, wheel up: zoom in
// During zoom we try to keep the point (dB or kHz) under the cursor fixed
float zoom_fac = event->delta() < 0 ? 1.1 : 0.9;
float ratio = (float)pt.y() / (float)m_OverlayPixmap.height();
float db_range = (float)(m_MaxdB - m_MindB);
float y_range = (float)m_OverlayPixmap.height();
float db_per_pix = db_range / y_range;
float fixed_db = m_MaxdB - pt.y() * db_per_pix;
db_range *= zoom_fac;
m_MaxdB = fixed_db + ratio*db_range;
m_MindB = m_MaxdB - db_range;
}
else if (m_CursorCaptured == XAXIS)
{
// calculate new range shown on FFT
float zoom_factor = event->delta() < 0 ? 1.1 : 0.9;
float new_range = (float)(m_Span) * zoom_factor;
// Frequency where event occured is kept fixed under mouse
float ratio = (float)pt.x() / (float)m_OverlayPixmap.width();
float fixed_hz = FreqfromX(pt.x());
float f_max = fixed_hz + (1.0 - ratio) * new_range;
float f_min = f_max - new_range;
qint64 fc = (qint64)(f_min + (f_max - f_min) / 2.0);
SetFftCenterFreq(fc-m_CenterFreq);
SetSpanFreq((quint32)new_range);
zoom_factor = (float)m_SampleFreq/(float)m_Span;
qDebug() << QString("Spectrum zoom: %1x").arg(zoom_factor, 0, 'f', 1);
}
else if (event->modifiers() & Qt::ControlModifier)
{
// filter width
m_DemodLowCutFreq -= numSteps*m_ClickResolution;
m_DemodHiCutFreq += numSteps*m_ClickResolution;
ClampDemodParameters();
emit NewFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
}
else if (event->modifiers() & Qt::ShiftModifier)
{
// filter shift
m_DemodLowCutFreq += numSteps*m_ClickResolution;
m_DemodHiCutFreq += numSteps*m_ClickResolution;
ClampDemodParameters();
emit NewFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
}
else
{
// inc/dec demod frequency
m_DemodCenterFreq += (numSteps*m_ClickResolution);
m_DemodCenterFreq = RoundFreq(m_DemodCenterFreq, m_ClickResolution );
emit NewDemodFreq(m_DemodCenterFreq, m_DemodCenterFreq-m_CenterFreq);
}
if (m_Running)
m_DrawOverlay = true;
else
DrawOverlay();
}
//////////////////////////////////////////////////////////////////////
// Called when mouse moves and does different things depending
//on the state of the mouse buttons for dragging the demod bar or
// filter edges.
//////////////////////////////////////////////////////////////////////
void CPlotter::mouseMoveEvent(QMouseEvent* event)
{
QPoint pt = event->pos();
/* mouse enter / mouse leave events */
if (m_OverlayPixmap.rect().contains(pt))
{ //is in Overlay bitmap region
if (event->buttons() == Qt::NoButton)
{ //if no mouse button monitor grab regions and change cursor icon
if (IsPointCloseTo(pt.x(), m_DemodFreqX, m_CursorCaptureDelta))
{ //in move demod box center frequency region
if (CENTER != m_CursorCaptured)
setCursor(QCursor(Qt::CrossCursor));
m_CursorCaptured = CENTER;
}
else if (IsPointCloseTo(pt.x(), m_DemodHiCutFreqX, m_CursorCaptureDelta))
{ //in move demod hicut region
if (RIGHT != m_CursorCaptured)
setCursor(QCursor(Qt::SizeHorCursor));
m_CursorCaptured = RIGHT;
}
else if (IsPointCloseTo(pt.x(), m_DemodLowCutFreqX, m_CursorCaptureDelta))
{ //in move demod lowcut region
if (LEFT != m_CursorCaptured)
setCursor(QCursor(Qt::SizeHorCursor));
m_CursorCaptured = LEFT;
}
else if (IsPointCloseTo(pt.x(), m_YAxisWidth/2, m_YAxisWidth/2))
{
if (YAXIS != m_CursorCaptured)
setCursor(QCursor(Qt::OpenHandCursor));
m_CursorCaptured = YAXIS;
}
else if (IsPointCloseTo(pt.y(), m_XAxisYCenter, m_CursorCaptureDelta+5))
{
if (XAXIS != m_CursorCaptured)
setCursor(QCursor(Qt::OpenHandCursor));
m_CursorCaptured = XAXIS;
}
else
{ //if not near any grab boundaries
if (NONE != m_CursorCaptured)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NONE;
}
}
m_GrabPosition = 0;
}
}
else
{ //not in Overlay region
if (event->buttons() == Qt::NoButton)
{
if (NONE != m_CursorCaptured)
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NONE;
m_GrabPosition = 0;
}
}
// process mouse moves while in cursor capture modes
if (YAXIS == m_CursorCaptured)
{
if (event->buttons() & Qt::LeftButton)
{
setCursor(QCursor(Qt::ClosedHandCursor));
// move Y scale up/down
int delta_px = m_Yzero - pt.y();
int delta_db = delta_px * abs(m_MindB-m_MaxdB)/m_OverlayPixmap.height();
m_MindB -= delta_db;
m_MaxdB -= delta_db;
if (m_Running)
m_DrawOverlay = true;
else
DrawOverlay();
m_Yzero = pt.y();
}
}
else if (XAXIS == m_CursorCaptured)
{
if (event->buttons() & (Qt::LeftButton | Qt::MiddleButton))
{
setCursor(QCursor(Qt::ClosedHandCursor));
// pan viewable range or move center frequency
int delta_px = m_Xzero - pt.x();
qint64 delta_hz = delta_px * m_Span / m_OverlayPixmap.width();
if (event->buttons() & Qt::MiddleButton)
{
m_CenterFreq += delta_hz;
m_DemodCenterFreq += delta_hz;
emit NewCenterFreq(m_CenterFreq);
}
else
{
m_FftCenter += delta_hz;
}
if (m_Running)
m_DrawOverlay = true;
else
DrawOverlay();
m_Xzero = pt.x();
}
}
else if (LEFT == m_CursorCaptured)
{ // moving in demod lowcut region
if (event->buttons() & (Qt::LeftButton|Qt::RightButton))
{ //moving in demod lowcut region with left button held
if (m_GrabPosition != 0)
{
m_DemodLowCutFreq = FreqfromX(pt.x()-m_GrabPosition ) - m_DemodCenterFreq;
m_DemodLowCutFreq = RoundFreq(m_DemodLowCutFreq, m_FilterClickResolution);
if (m_symetric && (event->buttons() & Qt::LeftButton)) // symetric adjustment
{
m_DemodHiCutFreq = -m_DemodLowCutFreq;
}
ClampDemodParameters();
emit NewFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
if (m_Running)
m_DrawOverlay = true; // schedule update of overlay during draw()
else
DrawOverlay(); // not running so update oiverlay now
}
else
{ //save initial grab postion from m_DemodFreqX
m_GrabPosition = pt.x()-m_DemodLowCutFreqX;
}
}
else if (event->buttons() & ~Qt::NoButton)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NONE;
}
}
else if (RIGHT == m_CursorCaptured)
{ // moving in demod highcut region
if (event->buttons() & (Qt::LeftButton|Qt::RightButton))
{ // moving in demod highcut region with right button held
if (m_GrabPosition != 0)
{
m_DemodHiCutFreq = FreqfromX( pt.x()-m_GrabPosition ) - m_DemodCenterFreq;
m_DemodHiCutFreq = RoundFreq(m_DemodHiCutFreq, m_FilterClickResolution);
if (m_symetric && (event->buttons() & Qt::LeftButton)) // symetric adjustment
{
m_DemodLowCutFreq = -m_DemodHiCutFreq;
}
ClampDemodParameters();
emit NewFilterFreq(m_DemodLowCutFreq, m_DemodHiCutFreq);
if (m_Running)
m_DrawOverlay = true; // schedule update of overlay during draw()
else
DrawOverlay(); // not running so update oiverlay now
}
else
{ //save initial grab postion from m_DemodFreqX
m_GrabPosition = pt.x()-m_DemodHiCutFreqX;
}
}
else if (event->buttons() & ~Qt::NoButton)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NONE;
}
}
else if (CENTER == m_CursorCaptured)
{ // moving inbetween demod lowcut and highcut region
if (event->buttons() & Qt::LeftButton)
{ // moving inbetween demod lowcut and highcut region with left button held
if (m_GrabPosition != 0)
{
m_DemodCenterFreq = RoundFreq(FreqfromX(pt.x()-m_GrabPosition), m_ClickResolution );
emit NewDemodFreq(m_DemodCenterFreq, m_DemodCenterFreq-m_CenterFreq);
if (m_Running)
m_DrawOverlay = true; // schedule update of overlay during draw()
else
DrawOverlay(); // not running so update oiverlay now
}
else
{ //save initial grab postion from m_DemodFreqX
m_GrabPosition = pt.x()-m_DemodFreqX;
}
}
else if (event->buttons() & ~Qt::NoButton)
{
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NONE;
}
}
else //if cursor not captured
{
m_GrabPosition = 0;
}
if (!this->rect().contains(pt))
{
if(NONE != m_CursorCaptured)
setCursor(QCursor(Qt::ArrowCursor));
m_CursorCaptured = NONE;
}
}
//////////////////////////////////////////////////////////////////////
// Called to draw an overlay bitmap containing grid and text that
// does not need to be recreated every fft data update.
//////////////////////////////////////////////////////////////////////
void CPlotter::DrawOverlay()
{
if (m_OverlayPixmap.isNull())
return;
int w = m_OverlayPixmap.width();
int h = m_OverlayPixmap.height();
int x,y;
float pixperdiv;
QRect rect;
QPainter painter(&m_OverlayPixmap);
painter.initFrom(this);
//m_OverlayPixmap.fill(Qt::black);
//fill background with gradient
QLinearGradient gradient(0, 0, 0 ,h);
gradient.setColorAt(0, QColor(0x20,0x20,0x20,0xFF));
gradient.setColorAt(1, QColor(0x4F,0x4F,0x4F,0xFF));
painter.setBrush(gradient);
painter.drawRect(0, 0, w, h);
//Draw demod filter box
ClampDemodParameters();
m_DemodFreqX = XfromFreq(m_DemodCenterFreq);
m_DemodLowCutFreqX = XfromFreq(m_DemodCenterFreq + m_DemodLowCutFreq);
m_DemodHiCutFreqX = XfromFreq(m_DemodCenterFreq + m_DemodHiCutFreq);
int dw = m_DemodHiCutFreqX - m_DemodLowCutFreqX;
painter.setBrush(Qt::SolidPattern);
painter.setOpacity(0.3);
painter.fillRect(m_DemodLowCutFreqX, 0, dw, h, Qt::gray);
painter.setOpacity(1.0);
// edge of filter -> we don't need different color
//painter.setPen(QPen(Qt::gray, 1, Qt::SolidLine));
//painter.drawLine(m_DemodLowCutFreqX, 0, m_DemodLowCutFreqX, h);
//painter.drawLine(m_DemodHiCutFreqX, 0, m_DemodHiCutFreqX, h);
painter.setPen(QPen(QColor(0xFF,0x71,0x71,0xFF), 1, Qt::SolidLine));
painter.drawLine(m_DemodFreqX, 0, m_DemodFreqX, h);
//create Font to use for scales
QFont Font("Arial");
Font.setPointSize(9);
QFontMetrics metrics(Font);
y = h/VERT_DIVS;
//if (y < metrics.height())
// Font.setPixelSize(y);
Font.setWeight(QFont::Normal);
painter.setFont(Font);
//draw vertical grids
pixperdiv = (float)w / (float)HORZ_DIVS;
y = h - h/VERT_DIVS/2;
for (int i = 1; i < HORZ_DIVS; i++)
{
x = (int)((float)i*pixperdiv);
if (i == HORZ_DIVS/2)
// center line
painter.setPen(QPen(QColor(0x78,0x82,0x96,0xFF), 1, Qt::SolidLine));
else
painter.setPen(QPen(QColor(0xF0,0xF0,0xF0,0x30), 1, Qt::DotLine));
painter.drawLine(x, 0, x , y);
//painter.drawLine(x, h-5, x , h);
}
//draw frequency values
MakeFrequencyStrs();
painter.setPen(QColor(0xD8,0xBA,0xA1,0xFF));
y = h - (h/VERT_DIVS);
for (int i = 1; i < HORZ_DIVS; i++)
{
//if ((i==0) || (i==HORZ_DIVS))
//{ //left justify the leftmost text
//x = (int)( (float)i*pixperdiv);
//rect.setRect(x ,y, (int)pixperdiv, h/VERT_DIVS);
//painter.drawText(rect, Qt::AlignLeft|Qt::AlignVCenter, m_HDivText[i]);
//}
//else if(HORZ_DIVS == i)
//{ //right justify the rightmost text
// x = (int)( (float)i*pixperdiv - pixperdiv);
// rect.setRect(x ,y, (int)pixperdiv, h/VERT_DIVS);
// painter.drawText(rect, Qt::AlignRight|Qt::AlignVCenter, m_HDivText[i]);
//}
//else
//{ //center justify the rest of the text
x = (int)((float)i*pixperdiv - pixperdiv/2);
rect.setRect(x, y, (int)pixperdiv, h/VERT_DIVS);
painter.drawText(rect, Qt::AlignHCenter|Qt::AlignBottom, m_HDivText[i]);
//}
}
//draw horizontal grids
pixperdiv = (float)h / (float)VERT_DIVS;
painter.setPen(QPen(QColor(0xF0,0xF0,0xF0,0x30), 1,Qt::DotLine));
for (int i = 1; i < VERT_DIVS; i++)
{
y = (int)((float) i*pixperdiv);
painter.drawLine(5*metrics.width("0",-1), y, w, y);
}
//draw amplitude values
painter.setPen(QColor(0xD8,0xBA,0xA1,0xFF));
//Font.setWeight(QFont::Light);
painter.setFont(Font);
int dB = m_MaxdB;
for (int i = 1; i < VERT_DIVS; i++)
{
dB -= m_dBStepSize; /* move to end if want to include maxdb */
y = (int)((float)i*pixperdiv);
rect.setRect(0, y-metrics.height()/2, metrics.width("-120 "), metrics.height());
painter.drawText(rect, Qt::AlignRight|Qt::AlignVCenter, QString::number(dB));
}
m_MindB = m_MaxdB - (VERT_DIVS)*m_dBStepSize;
if (!m_Running)
{ //if not running so is no data updates to draw to screen
//copy into 2Dbitmap the overlay bitmap.
m_2DPixmap = m_OverlayPixmap.copy(0,0,w,h);
//trigger a new paintEvent
update();
}
}
//////////////////////////////////////////////////////////////////////
// Called to draw an overlay bitmap containing grid and text that
// does not need to be recreated every fft data update.
//////////////////////////////////////////////////////////////////////
void CPlotter::DrawOverlay()
{
if (m_OverlayPixmap.isNull())
return;
int w = m_OverlayPixmap.width();
int h = m_OverlayPixmap.height();
int x,y;
float pixperdiv;
QRect rect;
QPainter painter(&m_OverlayPixmap);
painter.initFrom(this);
// horizontal grids (size and grid calcs could be moved to resize)
m_VerDivs = h/m_VdivDelta+1;
m_HorDivs = w/m_HdivDelta;
if (m_HorDivs % 2)
m_HorDivs++; // we want an odd number of divs so that we have a center line
//m_OverlayPixmap.fill(Qt::black);
//fill background with gradient
QLinearGradient gradient(0, 0, 0 ,h);
gradient.setColorAt(0, QColor(0x20,0x20,0x20,0xFF));
gradient.setColorAt(1, QColor(0x4F,0x4F,0x4F,0xFF));
painter.setBrush(gradient);
painter.drawRect(0, 0, w, h);
//Draw demod filter box
if (m_FilterBoxEnabled)
{
ClampDemodParameters();
m_DemodFreqX = XfromFreq(m_DemodCenterFreq);
m_DemodLowCutFreqX = XfromFreq(m_DemodCenterFreq + m_DemodLowCutFreq);
m_DemodHiCutFreqX = XfromFreq(m_DemodCenterFreq + m_DemodHiCutFreq);
int dw = m_DemodHiCutFreqX - m_DemodLowCutFreqX;
painter.setBrush(Qt::SolidPattern);
painter.setOpacity(0.3);
painter.fillRect(m_DemodLowCutFreqX, 0, dw, h, Qt::gray);
painter.setOpacity(1.0);
painter.setPen(QPen(QColor(0xFF,0x71,0x71,0xFF), 1, Qt::SolidLine));
painter.drawLine(m_DemodFreqX, 0, m_DemodFreqX, h);
}
//create Font to use for scales
QFont Font("Arial");
Font.setPointSize(m_FontSize);
QFontMetrics metrics(Font);
Font.setWeight(QFont::Normal);
painter.setFont(Font);
// draw vertical grids
pixperdiv = (float)w / (float)m_HorDivs;
y = h - h/m_VerDivs/2;
for (int i = 1; i < m_HorDivs; i++)
{
x = (int)((float)i*pixperdiv);
if ((i == m_HorDivs/2) && m_CenterLineEnabled)
// center line
painter.setPen(QPen(QColor(0x78,0x82,0x96,0xFF), 1, Qt::SolidLine));
else
painter.setPen(QPen(QColor(0xF0,0xF0,0xF0,0x30), 1, Qt::DotLine));
painter.drawLine(x, 0, x , y);
}
//draw frequency values
MakeFrequencyStrs();
painter.setPen(QColor(0xD8,0xBA,0xA1,0xFF));
y = h - (h/m_VerDivs);
for (int i = 1; i < m_HorDivs; i++)
{
x = (int)((float)i*pixperdiv - pixperdiv/2);
rect.setRect(x, y, (int)pixperdiv, h/m_VerDivs);
painter.drawText(rect, Qt::AlignHCenter|Qt::AlignBottom, m_HDivText[i]);
}
m_dBStepSize = abs(m_MaxdB-m_MindB)/(double)m_VerDivs;
pixperdiv = (float)h / (float)m_VerDivs;
painter.setPen(QPen(QColor(0xF0,0xF0,0xF0,0x30), 1,Qt::DotLine));
for (int i = 1; i < m_VerDivs; i++)
{
y = (int)((float) i*pixperdiv);
painter.drawLine(5*metrics.width("0",-1), y, w, y);
}
//draw amplitude values
painter.setPen(QColor(0xD8,0xBA,0xA1,0xFF));
//Font.setWeight(QFont::Light);
painter.setFont(Font);
int dB = m_MaxdB;
m_YAxisWidth = metrics.width("-120 ");
for (int i = 1; i < m_VerDivs; i++)
{
dB -= m_dBStepSize; /* move to end if want to include maxdb */
y = (int)((float)i*pixperdiv);
rect.setRect(0, y-metrics.height()/2, m_YAxisWidth, metrics.height());
painter.drawText(rect, Qt::AlignRight|Qt::AlignVCenter, QString::number(dB));
}
if (!m_Running)
{ //if not running so is no data updates to draw to screen
//copy into 2Dbitmap the overlay bitmap.
m_2DPixmap = m_OverlayPixmap.copy(0,0,w,h);
//trigger a new paintEvent
update();
}
}
