*/
#include "ruler.h"
+
#include "view.h"
-#include "viewport.h"
+#include "pv/util.h"
#include <extdef.h>
-#include <assert.h>
-#include <math.h>
-
-#include <QMouseEvent>
-#include <QPainter>
-#include <QTextStream>
-
-using namespace std;
+using namespace Qt;
namespace pv {
namespace view {
+const int Ruler::RulerHeight = 30;
const int Ruler::MinorTickSubdivision = 4;
const int Ruler::ScaleUnits[3] = {1, 2, 5};
-const QString Ruler::SIPrefixes[9] =
- {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"};
-const int Ruler::FirstSIPrefixPower = -15;
-
const int Ruler::HoverArrowSize = 5;
Ruler::Ruler(View &parent) :
- QWidget(&parent),
- _view(parent)
+ MarginWidget(parent)
{
setMouseTracking(true);
this, SLOT(hover_point_changed()));
}
-void Ruler::paintEvent(QPaintEvent *event)
+QSize Ruler::sizeHint() const
{
- QPainter p(this);
- p.setRenderHint(QPainter::Antialiasing);
-
- const double MinSpacing = 80;
-
- const double min_period = _view.scale() * MinSpacing;
-
- const int order = (int)floorf(log10f(min_period));
- const double order_decimal = pow(10, order);
+ return QSize(0, RulerHeight);
+}
- unsigned int unit = 0;
- double tick_period = 0.0f;
+void Ruler::paintEvent(QPaintEvent*)
+{
+ const int ValueMargin = 3;
- do
- {
- tick_period = order_decimal * ScaleUnits[unit++];
- } while(tick_period < min_period && unit < countof(ScaleUnits));
+ QPainter p(this);
+ p.setRenderHint(QPainter::Antialiasing);
- const unsigned int prefix = (order - FirstSIPrefixPower) / 3;
- assert(prefix >= 0);
- assert(prefix < countof(SIPrefixes));
+ std::pair<double, unsigned int> spacing =
+ calculate_tick_spacing(p, _view.scale(), _view.offset());
- const double multiplier = pow(10.0, - prefix * 3 - FirstSIPrefixPower);
+ double tick_period = spacing.first;
+ unsigned int prefix = spacing.second;
const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
- Qt::AlignLeft | Qt::AlignTop, "8").height();
+ AlignLeft | AlignTop, "8").height();
// Draw the tick marks
- p.setPen(Qt::black);
+ p.setPen(palette().color(foregroundRole()));
const double minor_tick_period = tick_period / MinorTickSubdivision;
const double first_major_division =
const double t0 = first_major_division * tick_period;
int division = (int)round(first_minor_division -
- first_major_division * MinorTickSubdivision);
- while(1)
- {
- const double t = t0 + division * minor_tick_period;
- const double x = (t - _view.offset()) / _view.scale();
+ first_major_division * MinorTickSubdivision) - 1;
+
+ const int major_tick_y1 = text_height + ValueMargin * 2;
+ const int tick_y2 = height();
+ const int minor_tick_y1 = (major_tick_y1 + tick_y2) / 2;
- if(x >= width())
- break;
+ double x;
- if(division % MinorTickSubdivision == 0)
+ do {
+ const double t = t0 + division * minor_tick_period;
+ x = (t - _view.offset()) / _view.scale();
+
+ if (division % MinorTickSubdivision == 0)
{
// Draw a major tick
- QString s;
- QTextStream ts(&s);
- ts << (t * multiplier) << SIPrefixes[prefix] << "s";
- p.drawText(x, 0, 0, text_height, Qt::AlignCenter |
- Qt::AlignTop | Qt::TextDontClip, s);
- p.drawLine(QPointF(x, text_height),
- QPointF(x, height()));
+ p.drawText(x, ValueMargin, 0, text_height,
+ AlignCenter | AlignTop | TextDontClip,
+ pv::util::format_time(t, prefix));
+ p.drawLine(QPointF(x, major_tick_y1),
+ QPointF(x, tick_y2));
}
else
{
// Draw a minor tick
- p.drawLine(QPointF(x, (text_height + height()) / 2),
- QPointF(x, height()));
+ p.drawLine(QPointF(x, minor_tick_y1),
+ QPointF(x, tick_y2));
}
division++;
- }
- // Draw the cursors
- draw_cursors(p);
+ } while (x < width());
// Draw the hover mark
draw_hover_mark(p);
-
- p.end();
-}
-
-void Ruler::draw_cursors(QPainter &p)
-{
- if(!_view.cursors_shown())
- return;
-
- const QRect r = rect();
- pair<Cursor, Cursor> &cursors = _view.cursors();
- cursors.first.paint_label(p, r);
- cursors.second.paint_label(p, r);
}
void Ruler::draw_hover_mark(QPainter &p)
{
const int x = _view.hover_point().x();
- if(x == -1)
+
+ if (x == -1)
return;
p.setPen(QPen(Qt::NoPen));
- p.setBrush(QBrush(QColor(Qt::black)));
+ p.setBrush(QBrush(palette().color(foregroundRole())));
const int b = height() - 1;
const QPointF points[] = {
update();
}
+std::pair<double, unsigned int> Ruler::calculate_tick_spacing(
+ QPainter& p, double scale, double offset)
+{
+ const double SpacingIncrement = 32.0f;
+ const double MinValueSpacing = 32.0f;
+
+ double min_width = SpacingIncrement, typical_width;
+
+ double tick_period;
+ unsigned int prefix;
+
+ do {
+ const double min_period = scale * min_width;
+
+ const int order = (int)floorf(log10f(min_period));
+ const double order_decimal = pow(10.0, order);
+
+ unsigned int unit = 0;
+
+ do {
+ tick_period = order_decimal * ScaleUnits[unit++];
+ } while (tick_period < min_period && unit < countof(ScaleUnits));
+
+ prefix = (order - pv::util::FirstSIPrefixPower) / 3;
+
+ typical_width = p.boundingRect(0, 0, INT_MAX, INT_MAX,
+ AlignLeft | AlignTop, pv::util::format_time(offset,
+ prefix)).width() + MinValueSpacing;
+
+ min_width += SpacingIncrement;
+
+ } while(typical_width > tick_period / scale);
+
+ return std::make_pair(tick_period, prefix);
+}
+
} // namespace view
} // namespace pv
projects / pulseview.git / blobdiff