/*
- * This file is part of the sigrok project.
+ * This file is part of the PulseView project.
*
* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
*
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "ruler.h"
-#include "view.h"
+#include "ruler.hpp"
-#include "../../extdef.h"
+#include "view.hpp"
+#include "pv/util.hpp"
-#include <assert.h>
-#include <math.h>
+#include <extdef.h>
-#include <QPainter>
-#include <QTextStream>
+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);
+
+ connect(&view_, SIGNAL(hover_point_changed()),
+ this, SLOT(hover_point_changed()));
}
-void Ruler::paintEvent(QPaintEvent *event)
+QSize Ruler::sizeHint() const
{
- QPainter p(this);
-
- 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);
+}
- 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 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(0.1, 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 =
- floor(_view.offset() / tick_period);
+ floor(view_.offset() / tick_period);
const double first_minor_division =
- ceil(_view.offset() / minor_tick_period);
+ ceil(view_.offset() / minor_tick_period);
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;
- if(x >= width())
- break;
+ 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(division % MinorTickSubdivision == 0)
+ double x;
+
+ 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(x, text_height, 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(x, (text_height + height()) / 2,
- x, height());
+ p.drawLine(QPointF(x, minor_tick_y1),
+ QPointF(x, tick_y2));
}
division++;
- }
- p.end();
+ } while (x < width());
+
+ // Draw the hover mark
+ draw_hover_mark(p);
+}
+
+void Ruler::draw_hover_mark(QPainter &p)
+{
+ const int x = view_.hover_point().x();
+
+ if (x == -1)
+ return;
+
+ p.setPen(QPen(Qt::NoPen));
+ p.setBrush(QBrush(palette().color(foregroundRole())));
+
+ const int b = height() - 1;
+ const QPointF points[] = {
+ QPointF(x, b),
+ QPointF(x - HoverArrowSize, b - HoverArrowSize),
+ QPointF(x + HoverArrowSize, b - HoverArrowSize)
+ };
+ p.drawPolygon(points, countof(points));
+}
+
+void Ruler::hover_point_changed()
+{
+ 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
projects / pulseview.git / blobdiff