+++ /dev/null
-/*
- * This file is part of the sigrok project.
- *
- * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "sigview.h"
-
-#include "sigsession.h"
-#include "signal.h"
-
-#include "extdef.h"
-
-#include <QMouseEvent>
-#include <QTextStream>
-
-#include <math.h>
-
-#include <boost/foreach.hpp>
-
-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(data_updated()),
- this, SLOT(data_updated()));
-
- setMouseTracking(true);
- setAutoFillBackground(false);
-}
-
-void SigView::zoom(double steps)
-{
- zoom(steps, (width() - LabelMarginWidth) / 2);
-}
-
-void SigView::initializeGL()
-{
-}
-
-void SigView::resizeGL(int width, int height)
-{
- setup_viewport(width, height);
-}
-
-void SigView::paintEvent(QPaintEvent *event)
-{
- int offset;
-
- const vector< shared_ptr<Signal> > &sigs =
- _session.get_signals();
-
- // Prepare for OpenGL rendering
- makeCurrent();
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
-
- 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)
- {
- assert(s);
-
- const QRect signal_rect(LabelMarginWidth, offset,
- width() - LabelMarginWidth, SignalHeight);
-
- s->paint(*this, signal_rect, _scale, _offset);
-
- offset += SignalHeight;
- }
-
- glDisable(GL_SCISSOR_TEST);
-
- // Prepare for QPainter rendering
- glMatrixMode(GL_MODELVIEW);
- glPopMatrix();
-
- QPainter painter(this);
- painter.setRenderHint(QPainter::Antialiasing);
-
- // Paint the labels
- offset = RulerHeight;
- BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
- {
- assert(s);
-
- const QRect label_rect(0, offset,
- LabelMarginWidth, SignalHeight);
- s->paint_label(painter, label_rect);
-
- offset += SignalHeight;
- }
-
- // Paint the ruler
- paint_ruler(painter);
-
- painter.end();
-}
-
-void SigView::data_updated()
-{
- update();
-}
-
-void SigView::mousePressEvent(QMouseEvent *event)
-{
- assert(event);
-
- _mouse_down_point = event->pos();
- _mouse_down_offset = _offset;
-}
-
-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);
-}
-
-void SigView::wheelEvent(QWheelEvent *event)
-{
- assert(event);
- zoom(event->delta() / 120, event->x() - LabelMarginWidth);
-}
-
-void SigView::setup_viewport(int width, int height)
-{
- glViewport(0, 0, (GLint)width, (GLint)height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0, width, height, 0, -1, 1);
- glMatrixMode(GL_MODELVIEW);
-}
-
-void SigView::paint_ruler(QPainter &p)
-{
- const double MinSpacing = 80;
-
- const double min_period = _scale * MinSpacing;
-
- const int order = (int)floorf(log10f(min_period));
- const double order_decimal = pow(10, order);
-
- int unit = 0;
- double tick_period = 0.0f;
-
- do
- {
- tick_period = order_decimal * ScaleUnits[unit++];
- } while(tick_period < min_period && unit < countof(ScaleUnits));
-
- const int prefix = (order - FirstSIPrefixPower) / 3;
- assert(prefix >= 0);
- assert(prefix < countof(SIPrefixes));
-
- 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 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)
- {
- 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++;
- }
-}
-
-void SigView::zoom(double steps, int offset)
-{
- const double cursor_offset = _offset + _scale * offset;
- _scale *= pow(3.0/2.0, -steps);
- _scale = max(min(_scale, MaxScale), MinScale);
- _offset = cursor_offset - _scale * offset;
- update();
-}
projects / pulseview.git / blobdiff