#include "extdef.h"
#include <QMouseEvent>
+#include <QTextStream>
#include <math.h>
using namespace boost;
using namespace std;
+const double SigView::MaxScale = 1e9;
+const double SigView::MinScale = 1e-15;
+
const int SigView::SignalHeight = 50;
const int SigView::LabelMarginWidth = 70;
const int SigView::RulerHeight = 30;
+const int SigView::MinorTickSubdivision = 4;
const int SigView::ScaleUnits[3] = {1, 2, 5};
+const QString SigView::SIPrefixes[9] =
+ {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"};
+const int SigView::FirstSIPrefixPower = -15;
+
SigView::SigView(SigSession &session, QWidget *parent) :
QGLWidget(parent),
_session(session),
_scale(1e-6),
_offset(0)
{
- connect(&_session, SIGNAL(dataUpdated()),
- this, SLOT(dataUpdated()));
+ connect(&_session, SIGNAL(data_updated()),
+ this, SLOT(data_updated()));
setMouseTracking(true);
setAutoFillBackground(false);
void SigView::resizeGL(int width, int height)
{
- setupViewport(width, height);
+ setup_viewport(width, height);
}
void SigView::paintEvent(QPaintEvent *event)
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
- setupViewport(width(), height());
+ setup_viewport(width(), height());
qglClearColor(Qt::white);
glClear(GL_COLOR_BUFFER_BIT);
// Plot the signal
+ glEnable(GL_SCISSOR_TEST);
+ glScissor(LabelMarginWidth, 0, width(), height());
offset = RulerHeight;
BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
{
offset += SignalHeight;
}
+ glDisable(GL_SCISSOR_TEST);
+
// Prepare for QPainter rendering
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
// Paint the ruler
- paintRuler(painter);
+ paint_ruler(painter);
painter.end();
}
-void SigView::dataUpdated()
+void SigView::data_updated()
{
update();
}
-void SigView::mouseMoveEvent(QMouseEvent *event)
+void SigView::mousePressEvent(QMouseEvent *event)
{
assert(event);
+
+ _mouse_down_point = event->pos();
+ _mouse_down_offset = _offset;
}
-void SigView::mousePressEvent(QMouseEvent *event)
+void SigView::mouseMoveEvent(QMouseEvent *event)
{
assert(event);
+
+ if(event->buttons() & Qt::LeftButton)
+ {
+ _offset = _mouse_down_offset + (_mouse_down_point - event->pos()).x() * _scale;
+ update();
+ }
}
void SigView::mouseReleaseEvent(QMouseEvent *event)
{
assert(event);
+}
- const double cursor_offset = _offset + _scale * (double)event->x();
-
- switch(event->button())
- {
- case Qt::LeftButton:
- _scale *= 2.0 / 3.0;
- break;
-
- case Qt::RightButton:
- _scale *= 3.0 / 2.0;
- break;
- }
-
- _offset = cursor_offset - _scale * (double)event->x();
+void SigView::wheelEvent(QWheelEvent *event)
+{
+ assert(event);
+ const double x = event->x() - LabelMarginWidth;
+ const double cursor_offset = _offset + _scale * x;
+ _scale *= powf(3.0/2.0, -event->delta() / 120);
+ _scale = max(min(_scale, MaxScale), MinScale);
+ _offset = cursor_offset - _scale * x;
update();
}
-void SigView::setupViewport(int width, int height)
+void SigView::setup_viewport(int width, int height)
{
glViewport(0, 0, (GLint)width, (GLint)height);
glMatrixMode(GL_PROJECTION);
glMatrixMode(GL_MODELVIEW);
}
-void SigView::paintRuler(QPainter &p)
+void SigView::paint_ruler(QPainter &p)
{
- const double MinSpacing = 20;
+ const double MinSpacing = 80;
- double tick_period = 0.0f;
const double min_period = _scale * MinSpacing;
- double order = 10e-15;
- while(tick_period < min_period)
+ const int order = (int)floorf(log10f(min_period));
+ const double order_decimal = pow(10, order);
+
+ int unit = 0;
+ double tick_period = 0.0f;
+
+ do
{
- int unit = 0;
- while(tick_period < min_period &&
- unit < countof(ScaleUnits))
- tick_period = order * ScaleUnits[unit++];
- order *= 10;
- }
+ tick_period = order_decimal * ScaleUnits[unit++];
+ } while(tick_period < min_period && unit < countof(ScaleUnits));
- const double tick_seperation = tick_period / _scale;
+ const int prefix = (order - FirstSIPrefixPower) / 3;
+ assert(prefix >= 0);
+ assert(prefix < countof(SIPrefixes));
- p.setPen(Qt::transparent);
- p.setBrush(QColor(0xC0, 0xC0, 0xC0));
- p.drawRect(LabelMarginWidth, 0,
- width() - LabelMarginWidth, RulerHeight);
+ const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
+ Qt::AlignLeft | Qt::AlignTop, "8").height();
+ // Draw the tick marks
p.setPen(Qt::black);
- const double offset_ticks = -_offset / tick_period;
- double x = (offset_ticks - floor(offset_ticks)) *
- tick_seperation + LabelMarginWidth;
- while(x < width())
+ const double minor_tick_period = tick_period / MinorTickSubdivision;
+ const double first_major_division = floor(_offset / tick_period);
+ const double first_minor_division = ceil(_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)
{
- p.drawLine(x, 0, x, RulerHeight);
- x += tick_seperation;
+ const double t = t0 + division * minor_tick_period;
+ const double x = (t - _offset) / _scale + LabelMarginWidth;
+
+ if(x >= width())
+ break;
+
+ if(division % MinorTickSubdivision == 0)
+ {
+ // Draw a major tick
+ QString s;
+ QTextStream ts(&s);
+ ts << (t / order_decimal) << SIPrefixes[prefix] << "s";
+ p.drawText(x, 0, 0, text_height, Qt::AlignCenter | Qt::AlignTop |
+ Qt::TextDontClip, s);
+ p.drawLine(x, text_height, x, RulerHeight);
+ }
+ else
+ {
+ // Draw a minor tick
+ p.drawLine(x, (text_height + RulerHeight) / 2, x, RulerHeight);
+ }
+
+ division++;
}
}
projects / pulseview.git / blobdiff