+++ /dev/null
-/*
- * This file is part of the PulseView 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 "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 {
-
-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),
- _grabbed_marker(NULL)
-{
- setMouseTracking(true);
-
- connect(&_view, SIGNAL(hover_point_changed()),
- this, SLOT(hover_point_changed()));
-}
-
-void Ruler::paintEvent(QPaintEvent*)
-{
- using namespace Qt;
-
- const double SpacingIncrement = 32.0f;
- const double MinValueSpacing = 32.0f;
- const int ValueMargin = 3;
-
- QPainter p(this);
- p.setRenderHint(QPainter::Antialiasing);
-
- double min_width = SpacingIncrement, typical_width;
- double tick_period;
- unsigned int prefix;
- double multiplier;
-
- // Find tick spacing, and number formatting that does not cause
- // value to collide.
- do
- {
- 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));
-
- multiplier = pow(10.0, - prefix * 3 - FirstSIPrefixPower);
-
- typical_width = p.boundingRect(0, 0, INT_MAX, INT_MAX,
- AlignLeft | AlignTop, format_time(_view.offset(),
- multiplier, prefix)).width() + MinValueSpacing;
-
- min_width += SpacingIncrement;
-
- } while(typical_width > tick_period / _view.scale());
-
- const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
- AlignLeft | AlignTop, "8").height();
-
- // Draw the tick marks
- p.setPen(palette().color(foregroundRole()));
-
- 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);
-
- 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())
- break;
-
- if (division % MinorTickSubdivision == 0)
- {
- // Draw a major tick
- p.drawText(x, ValueMargin, 0, text_height,
- AlignCenter | AlignTop | TextDontClip,
- format_time(t, multiplier, prefix));
- p.drawLine(QPointF(x, major_tick_y1),
- QPointF(x, tick_y2));
- }
- else
- {
- // Draw a minor tick
- p.drawLine(QPointF(x, minor_tick_y1),
- QPointF(x, tick_y2));
- }
-
- division++;
- }
-
- // Draw the cursors
- draw_cursors(p);
-
- // 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;
-}
-
-QString Ruler::format_time(double t, double multiplier,
- unsigned int prefix)
-{
- QString s;
- QTextStream ts(&s);
- ts.setRealNumberPrecision(0);
- ts << fixed << forcesign << (t * multiplier) <<
- SIPrefixes[prefix] << "s";
- return s;
-}
-
-void Ruler::draw_cursors(QPainter &p)
-{
- if (!_view.cursors_shown())
- return;
-
- const QRect r = rect();
- pair<Cursor, Cursor> &cursors = _view.cursors();
- cursors.first.paint_label(p, r);
- cursors.second.paint_label(p, r);
-}
-
-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(QColor(Qt::black)));
-
- 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