+++ /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 "view.h"
-#include "viewport.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;
-
-namespace pv {
-namespace view {
-
-const int Viewport::SignalHeight = 50;
-
-const int Viewport::MinorTickSubdivision = 4;
-const int Viewport::ScaleUnits[3] = {1, 2, 5};
-
-const QString Viewport::SIPrefixes[9] =
- {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"};
-const int Viewport::FirstSIPrefixPower = -15;
-
-Viewport::Viewport(View &parent) :
- QGLWidget(&parent),
- _view(parent)
-{
- setMouseTracking(true);
- setAutoFillBackground(false);
-}
-
-int Viewport::get_total_height() const
-{
- int height = 0;
- BOOST_FOREACH(const shared_ptr<Signal> s,
- _view.session().get_signals()) {
- assert(s);
- height += SignalHeight;
- }
-
- return height;
-}
-
-void Viewport::initializeGL()
-{
-}
-
-void Viewport::resizeGL(int width, int height)
-{
- setup_viewport(width, height);
-}
-
-void Viewport::paintEvent(QPaintEvent *event)
-{
- int offset;
-
- const vector< shared_ptr<Signal> > &sigs =
- _view.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(View::LabelMarginWidth, 0, width(), height());
- offset = View::RulerHeight - _view.v_offset();
- BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
- {
- assert(s);
-
- const QRect signal_rect(View::LabelMarginWidth, offset,
- width() - View::LabelMarginWidth, SignalHeight);
-
- s->paint(*this, signal_rect, _view.scale(), _view.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 = View::RulerHeight - _view.v_offset();
- BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
- {
- assert(s);
-
- const QRect label_rect(0, offset,
- View::LabelMarginWidth, SignalHeight);
- s->paint_label(painter, label_rect);
-
- offset += SignalHeight;
- }
-
- // Paint the ruler
- paint_ruler(painter);
-
- painter.end();
-}
-
-void Viewport::mousePressEvent(QMouseEvent *event)
-{
- assert(event);
-
- _mouse_down_point = event->pos();
- _mouse_down_offset = _view.offset();
-}
-
-void Viewport::mouseMoveEvent(QMouseEvent *event)
-{
- assert(event);
-
- if(event->buttons() & Qt::LeftButton)
- {
- _view.set_scale_offset(_view.scale(),
- _mouse_down_offset +
- (_mouse_down_point - event->pos()).x() *
- _view.scale());
- }
-}
-
-void Viewport::mouseReleaseEvent(QMouseEvent *event)
-{
- assert(event);
-}
-
-void Viewport::wheelEvent(QWheelEvent *event)
-{
- assert(event);
- _view.zoom(event->delta() / 120, event->x() -
- View::LabelMarginWidth);
-}
-
-void Viewport::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 Viewport::paint_ruler(QPainter &p)
-{
- 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);
-
- 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(_view.offset() / tick_period);
- const double first_minor_division =
- 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() +
- View::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, View::RulerHeight);
- }
- else
- {
- // Draw a minor tick
- p.drawLine(x,
- (text_height + View::RulerHeight) / 2, x,
- View::RulerHeight);
- }
-
- division++;
- }
-}
-
-} // namespace view
-} // namespace pv
projects / pulseview.git / blobdiff