*/
#include "ruler.h"
+
+#include "cursor.h"
#include "view.h"
+#include "viewport.h"
#include <extdef.h>
#include <assert.h>
#include <math.h>
+#include <limits.h>
+#include <QMouseEvent>
#include <QPainter>
#include <QTextStream>
+using namespace std;
+
namespace pv {
namespace view {
{"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)
+ _view(parent),
+ _grabbed_marker(NULL)
{
+ setMouseTracking(true);
+
+ connect(&_view, SIGNAL(hover_point_changed()),
+ this, SLOT(hover_point_changed()));
}
-void Ruler::paintEvent(QPaintEvent *event)
+QString Ruler::format_time(double t, unsigned int prefix,
+ unsigned int precision)
{
- QPainter p(this);
+ const double multiplier = pow(10.0,
+ - prefix * 3 - FirstSIPrefixPower);
+
+ QString s;
+ QTextStream ts(&s);
+ ts.setRealNumberPrecision(precision);
+ ts << fixed << forcesign << (t * multiplier) <<
+ SIPrefixes[prefix] << "s";
+ return s;
+}
- const double MinSpacing = 80;
+void Ruler::paintEvent(QPaintEvent*)
+{
+ using namespace Qt;
- const double min_period = _view.scale() * MinSpacing;
+ const double SpacingIncrement = 32.0f;
+ const double MinValueSpacing = 32.0f;
+ const int ValueMargin = 3;
- const int order = (int)floorf(log10f(min_period));
- const double order_decimal = pow(10, order);
+ QPainter p(this);
+ p.setRenderHint(QPainter::Antialiasing);
- unsigned int unit = 0;
- double tick_period = 0.0f;
+ double min_width = SpacingIncrement, typical_width;
+ double tick_period;
+ unsigned int prefix;
+ // Find tick spacing, and number formatting that does not cause
+ // value to collide.
do
{
- tick_period = order_decimal * ScaleUnits[unit++];
- } while(tick_period < min_period && unit < countof(ScaleUnits));
+ const double min_period = _view.scale() * min_width;
+
+ const int order = (int)floorf(log10f(min_period));
+ const double order_decimal = pow(10, order);
+
+ unsigned int unit = 0;
+
+ do
+ {
+ tick_period = order_decimal * ScaleUnits[unit++];
+ } while (tick_period < min_period && unit < countof(ScaleUnits));
+
+ prefix = (order - FirstSIPrefixPower) / 3;
+ assert(prefix < countof(SIPrefixes));
+
- const unsigned int prefix = (order - FirstSIPrefixPower) / 3;
- assert(prefix >= 0);
- assert(prefix < countof(SIPrefixes));
+ typical_width = p.boundingRect(0, 0, INT_MAX, INT_MAX,
+ AlignLeft | AlignTop, format_time(_view.offset(),
+ prefix)).width() + MinValueSpacing;
- const double multiplier = pow(10.0, - prefix * 3 - FirstSIPrefixPower);
+ min_width += SpacingIncrement;
+
+ } while(typical_width > tick_period / _view.scale());
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 =
int division = (int)round(first_minor_division -
first_major_division * MinorTickSubdivision);
- while(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;
+
+ while (1)
{
const double t = t0 + division * minor_tick_period;
const double x = (t - _view.offset()) / _view.scale();
- if(x >= width())
+ if (x >= width())
break;
- if(division % MinorTickSubdivision == 0)
+ 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,
+ 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++;
}
+ // Draw the cursors
+ draw_cursors(p, prefix);
+
+ // Draw the hover mark
+ draw_hover_mark(p);
+
p.end();
}
+void Ruler::mouseMoveEvent(QMouseEvent *e)
+{
+ if (!_grabbed_marker)
+ return;
+
+ _grabbed_marker->set_time(_view.offset() +
+ ((double)e->x() + 0.5) * _view.scale());
+}
+
+void Ruler::mousePressEvent(QMouseEvent *e)
+{
+ if (e->buttons() & Qt::LeftButton) {
+ _grabbed_marker = NULL;
+
+ if (_view.cursors_shown()) {
+ std::pair<Cursor, Cursor> &cursors =
+ _view.cursors();
+ if (cursors.first.get_label_rect(
+ rect()).contains(e->pos()))
+ _grabbed_marker = &cursors.first;
+ else if (cursors.second.get_label_rect(
+ rect()).contains(e->pos()))
+ _grabbed_marker = &cursors.second;
+ }
+ }
+}
+
+void Ruler::mouseReleaseEvent(QMouseEvent *)
+{
+ _grabbed_marker = NULL;
+}
+
+void Ruler::draw_cursors(QPainter &p, unsigned int prefix)
+{
+ if (!_view.cursors_shown())
+ return;
+
+ const QRect r = rect();
+ pair<Cursor, Cursor> &cursors = _view.cursors();
+ cursors.first.paint_label(p, r, prefix);
+ cursors.second.paint_label(p, r, prefix);
+}
+
+void Ruler::draw_hover_mark(QPainter &p)
+{
+ const int x = _view.hover_point().x();
+
+ if (x == -1 || _grabbed_marker)
+ 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();
+}
+
} // namespace view
} // namespace pv
projects / pulseview.git / blobdiff