void ScaleEngine::autoScale (int maxNumSteps, double &x1, double &x2, double &stepSize) const
{
if (!hasBreak() || testAttribute(QwtScaleEngine::Inverted)){
QwtScaleEngine *engine;
if (d_type == QwtScaleTransformation::Log10)
engine = new QwtLog10ScaleEngine();
else
engine = new QwtLinearScaleEngine();
engine->setAttributes(attributes());
engine->setReference(reference());
engine->setMargins(loMargin(), hiMargin());
engine->autoScale(maxNumSteps, x1, x2, stepSize);
delete engine;
} else {
QwtScaleEngine *engine;
if (d_type == QwtScaleTransformation::Log10)
engine = new QwtLog10ScaleEngine();
else
engine = new QwtLinearScaleEngine();
engine->setAttributes(attributes());
double breakLeft = d_break_left;
engine->autoScale(maxNumSteps, x1, breakLeft, stepSize);
delete engine;
engine = new QwtLinearScaleEngine();
engine->setAttributes(attributes());
double breakRight = d_break_right;
engine->autoScale(maxNumSteps, breakRight, x2, stepSize);
delete engine;
}
}
void ScaleEngine::autoScale (int maxNumSteps, double &x1, double &x2, double &stepSize) const
{
if (!hasBreak() || testAttribute(QwtScaleEngine::Inverted)){
QwtScaleEngine *engine = newScaleEngine();
engine->setAttributes(attributes());
engine->setReference(reference());
engine->setMargins(lowerMargin(), upperMargin());
if (type() == ScaleTransformation::Log10 || type() == ScaleTransformation::Ln || type() == ScaleTransformation::Log2){
if (x1 <= 0.0)
x1 = LOG_MIN;
if (x2 <= 0.0)
x2 = LOG_MIN;
}
engine->autoScale(maxNumSteps, x1, x2, stepSize);
delete engine;
} else {
QwtScaleEngine *engine = newScaleEngine();
engine->setAttributes(attributes());
double breakLeft = d_break_left;
engine->autoScale(maxNumSteps, x1, breakLeft, stepSize);
delete engine;
engine = new QwtLinearScaleEngine();
engine->setAttributes(attributes());
double breakRight = d_break_right;
engine->autoScale(maxNumSteps, breakRight, x2, stepSize);
delete engine;
}
}
QwtScaleDiv ScaleEngine::divideScale(double x1, double x2, int maxMajSteps,
int maxMinSteps, double stepSize) const
{
QwtScaleEngine *engine;
if (!hasBreak()){
engine = newScaleEngine();
QwtScaleDiv div = engine->divideScale(x1, x2, maxMajSteps, maxMinSteps, stepSize);
delete engine;
return div;
}
double lb = d_break_left;
double rb = d_break_right;
double step1 = d_step_before;
double step2 = d_step_after;
if (x1 > x2){
lb = d_break_right;
rb = d_break_left;
step1 = d_step_after;
step2 = d_step_before;
if (d_log10_scale_after)
engine = new QwtLog10ScaleEngine();
else
engine = new QwtLinearScaleEngine();
} else
engine = newScaleEngine();
int max_min_intervals = d_minor_ticks_before;
if (d_minor_ticks_before == 1)
max_min_intervals = 3;
if (d_minor_ticks_before > 1)
max_min_intervals = d_minor_ticks_before + 1;
QwtScaleDiv div1 = engine->divideScale(x1, lb, maxMajSteps/2, max_min_intervals, step1);
max_min_intervals = d_minor_ticks_after;
if (d_minor_ticks_after == 1)
max_min_intervals = 3;
if (d_minor_ticks_after > 1)
max_min_intervals = d_minor_ticks_after + 1;
delete engine;
if (testAttribute(QwtScaleEngine::Inverted))
engine = newScaleEngine();
else if (d_log10_scale_after)
engine = new QwtLog10ScaleEngine();
else
engine = new QwtLinearScaleEngine();
QwtScaleDiv div2 = engine->divideScale(rb, x2, maxMajSteps/2, max_min_intervals, step2);
QwtValueList ticks[QwtScaleDiv::NTickTypes];
ticks[QwtScaleDiv::MinorTick] = div1.ticks(QwtScaleDiv::MinorTick) + div2.ticks(QwtScaleDiv::MinorTick);
ticks[QwtScaleDiv::MediumTick] = div1.ticks(QwtScaleDiv::MediumTick) + div2.ticks(QwtScaleDiv::MediumTick);
ticks[QwtScaleDiv::MajorTick] = div1.ticks(QwtScaleDiv::MajorTick) + div2.ticks(QwtScaleDiv::MajorTick);
delete engine;
return QwtScaleDiv(x1, x2, ticks);
}
EigenPlotDlg::EigenPlotDlg(QWidget* parent) :
QDialog(parent),
mpPlot(NULL),
mpCurve(NULL),
mpComponentsSpin(NULL)
{
// Eigen plot
mpPlot = new QwtPlot(this);
mpPlot->installEventFilter(this);
mpPlot->setAutoFillBackground(true);
QFont ftAxis = QApplication::font();
ftAxis.setBold(true);
ftAxis.setPointSize(10);
QwtText bottomText("Number of Components");
bottomText.setFont(ftAxis);
mpPlot->setAxisTitle(QwtPlot::xBottom, bottomText);
QwtText leftText("Eigen Values");
leftText.setFont(ftAxis);
mpPlot->setAxisTitle(QwtPlot::yLeft, leftText);
QwtScaleEngine* pLinearScale = mpPlot->axisScaleEngine(QwtPlot::xBottom);
pLinearScale->setAttribute(QwtScaleEngine::Floating);
QwtLog10ScaleEngine* pLogScale = new QwtLog10ScaleEngine();
pLogScale->setAttribute(QwtScaleEngine::Floating);
mpPlot->setAxisScaleEngine(QwtPlot::yLeft, pLogScale);
QPalette plotPalette = mpPlot->palette();
plotPalette.setColor(QPalette::Window, Qt::white);
mpPlot->setPalette(plotPalette);
QwtPlotCanvas* pPlotCanvas = mpPlot->canvas();
pPlotCanvas->setFrameStyle(QFrame::NoFrame);
QwtPlotLayout* pPlotLayout = mpPlot->plotLayout();
pPlotLayout->setMargin(5);
QwtPlotGrid* pPlotGrid = new QwtPlotGrid();
pPlotGrid->setPen(QPen(Qt::DotLine));
pPlotGrid->attach(mpPlot);
mpPlot->replot();
// Number of components
QLabel* pComponentsLabel = new QLabel("Number of Components:", this);
mpComponentsSpin = new QSpinBox(this);
mpComponentsSpin->setFixedWidth(50);
mpComponentsSpin->setMinimum(1);
QLabel* pDescriptionLabel = new QLabel("To set, left click in the plot or enter a value.", this);
pDescriptionLabel->setAlignment(Qt::AlignVCenter | Qt::AlignLeft);
pDescriptionLabel->setWordWrap(true);
QFont descriptionFont(pDescriptionLabel->font());
descriptionFont.setItalic(true);
pDescriptionLabel->setFont(descriptionFont);
QHBoxLayout* pComponentsLayout = new QHBoxLayout();
pComponentsLayout->setMargin(0);
pComponentsLayout->setSpacing(5);
pComponentsLayout->addWidget(pComponentsLabel);
pComponentsLayout->addWidget(mpComponentsSpin);
pComponentsLayout->addWidget(pDescriptionLabel, 10);
// Horizontal line
QFrame* pLine = new QFrame(this);
pLine->setFrameStyle(QFrame::HLine | QFrame::Sunken);
// Buttons
QPushButton* pOk = new QPushButton("&OK", this);
QPushButton* pCancel = new QPushButton("&Cancel", this);
connect(pOk, SIGNAL(clicked()), this, SLOT(accept()));
connect(pCancel, SIGNAL(clicked()), this, SLOT(reject()));
QHBoxLayout* pButtonLayout = new QHBoxLayout();
pButtonLayout->setMargin(0);
pButtonLayout->setSpacing(5);
pButtonLayout->addStretch(10);
pButtonLayout->addWidget(pOk);
pButtonLayout->addWidget(pCancel);
// Layout
QGridLayout* pGrid = new QGridLayout(this);
pGrid->setMargin(10);
pGrid->setSpacing(10);
pGrid->addWidget(mpPlot, 0, 0);
pGrid->addLayout(pComponentsLayout, 1, 0);
pGrid->addWidget(pLine, 2, 0);
pGrid->addLayout(pButtonLayout, 3, 0);
pGrid->setRowStretch(0, 10);
// Initialization
setWindowTitle("PCA Components");
setModal(true);
resize(440, 300);
}