void Lineplot::linkScales()
{
setAxisScaleDiv(QwtPlot::yRight, deref(axisScaleDiv(QwtPlot::yLeft)));
}
/**
* Set the scale of the horizontal axis
* @param from :: Minimum value
* @param to :: Maximum value
*/
void OneCurvePlot::setXScale(double from, double to)
{
QFontMetrics fm(axisFont(QwtPlot::xBottom));
int n = from != 0.0 ? abs(static_cast<int>(floor(log10(fabs(from))))) : 0;
int n1 = to != 0.0 ? abs(static_cast<int>(floor(log10(fabs(to))))) : 0;
if (n1 > n) n = n1;
n += 4;
// approxiamte width of a tick label in pixels
int labelWidth = n * fm.width("0");
// calculate number of major ticks
int nMajorTicks = this->width() / labelWidth;
if ( nMajorTicks > 6 ) nMajorTicks = 6;
// try creating a scale
const QwtScaleDiv div = axisScaleEngine(QwtPlot::xBottom)->divideScale(from,to,nMajorTicks,nMajorTicks);
// Major ticks are placed at round numbers so the first or last tick could be missing making
// scale look ugly. Trying to fix it if possible
bool rescaled = false;
// get actual tick positions
const QwtValueList& ticks = div.ticks(QwtScaleDiv::MajorTick);
if (!ticks.empty() && ticks.size() < nMajorTicks)
{
// how much first tick is shifted from the lower bound
double firstShift = ticks.front() - div.lBound();
// how much last tick is shifted from the upper bound
double lastShift = div.hBound() - ticks.back();
// range of the scale
double range = fabs(div.hBound() - div.lBound());
// we say that 1st tick is missing if first tick is father away from its end of the scale
// than the last tick is from its end
bool isFirstMissing = fabs(firstShift) > fabs(lastShift) ;
// if first tick is missing
if (isFirstMissing)
{
// distance between nearest major ticks
double tickSize = 0;
if (ticks.size() == 1)
{
// guess the tick size in case of only one visible
double tickLog = log10(firstShift);
tickLog = tickLog > 0 ? ceil(tickLog) : floor(tickLog);
tickSize = pow(10.,tickLog);
}
else if (ticks.size() > 1)
{
// take the difference between the two first ticks
tickSize = ticks[1] - ticks[0];
}
// claculate how much lower bound must be moved to make the missing tick visible
double shift = (ticks.front() - tickSize) - from;
// if the shift is not very big rescale the axis
if (fabs(shift/range) < 0.1)
{
from += shift;
const QwtScaleDiv updatedDiv = axisScaleEngine(QwtPlot::xBottom)->divideScale(from,to,nMajorTicks,nMajorTicks);
setAxisScaleDiv(xBottom,updatedDiv);
rescaled = true;
}
}
else // last tick is missing
{
// distance between nearest major ticks
double tickSize = 0;
if (ticks.size() == 1)
{
// guess the tick size in case of only one visible
double tickLog = log10(lastShift);
tickLog = tickLog > 0 ? ceil(tickLog) : floor(tickLog);
tickSize = pow(10.,tickLog);
}
else if (ticks.size() > 1)
{
// take the difference between the two first ticks
tickSize = ticks[1] - ticks[0];
}
// claculate how much upper bound must be moved to make the missing tick visible
double shift = (ticks.back() + tickSize) - to;
// if the shift is not very big rescale the axis
if (fabs(shift/range) < 0.1)
{
to += shift;
const QwtScaleDiv updatedDiv = axisScaleEngine(QwtPlot::xBottom)->divideScale(from,to,nMajorTicks,nMajorTicks);
setAxisScaleDiv(xBottom,updatedDiv);
rescaled = true;
}
}
}
if (!rescaled)
{
setAxisScaleDiv(xBottom,div);
}
m_zoomer->setZoomBase();
}
MUPlot::MUPlot(MUWidget *muw, CriticalPowerWindow *parent, Context *context)
: QwtPlot(parent), QwtSyntheticPointData(MUN),
context(context), muw(muw), parent(parent), modelCurve(NULL), slowCurve(NULL), fastCurve(NULL), mmpCurve(NULL)
{
// initalise all the model stufff
// probably abstract this out later
muSet = NULL;
slowHandle = NULL;
slowLine = NULL;
slowDrag = false;
fastHandle = NULL;
fastLine = NULL;
fastDrag = false;
setAutoDelete(false);
setAutoFillBackground(true);
static_cast<QwtPlotCanvas*>(canvas())->setFrameStyle(QFrame::NoFrame);
// left yAxis scale prettify
QwtScaleDraw *sd = new QwtScaleDraw;
sd->setTickLength(QwtScaleDiv::MajorTick, 3);
sd->enableComponent(QwtScaleDraw::Ticks, false);
sd->enableComponent(QwtScaleDraw::Backbone, false);
setAxisScaleDraw(yLeft, sd);
setAxisTitle(yLeft, tr("w(x)"));
setAxisMaxMinor(yLeft, 0);
plotLayout()->setAlignCanvasToScales(true);
// 0.5 increments on bottom axis
QwtValueList ytick[QwtScaleDiv::NTickTypes];
for (double i=0.0f; i<=10.0f; i+= 1.0)
ytick[QwtScaleDiv::MajorTick]<<i;
setAxisScaleDiv(yLeft,QwtScaleDiv(0.0f,10.0f,ytick));
// bottom xAxis scale prettify
sd = new QwtScaleDraw;
sd->setTickLength(QwtScaleDiv::MajorTick, 3);
sd->enableComponent(QwtScaleDraw::Ticks, false);
sd->enableComponent(QwtScaleDraw::Backbone, false);
setAxisScaleDraw(xBottom, sd);
setAxisTitle(xBottom, tr("Motor Unit, x"));
setAxisMaxMinor(xBottom, 0);
// 0.2 increments on bottom axis
QwtValueList xtick[QwtScaleDiv::NTickTypes];
for (double i=0.0f; i<=1.0f; i+= 0.2)
xtick[QwtScaleDiv::MajorTick]<<i;
setAxisScaleDiv(xBottom,QwtScaleDiv(0.0f,1.0f,xtick));
// now color everything we created
configChanged();
// set to a 2 Normal Model
setModel(2);
// set mouse tracker
parent->setMouseTracking(true);
installEventFilter(parent);
new muMouseTracker(this);
}
