+++ /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 <cassert>
-
-#include "view.h"
-#include "viewport.h"
-
-#include "signal.h"
-#include "../sigsession.h"
-
-#include <QMouseEvent>
-
-using std::abs;
-using std::max;
-using std::min;
-using std::shared_ptr;
-using std::vector;
-
-namespace pv {
-namespace view {
-
-Viewport::Viewport(View &parent) :
- QWidget(&parent),
- _view(parent),
- _mouse_down_valid(false),
- _pinch_zoom_active(false)
-{
- setAttribute(Qt::WA_AcceptTouchEvents, true);
-
- setMouseTracking(true);
- setAutoFillBackground(true);
- setBackgroundRole(QPalette::Base);
-
- connect(&_view.session(), SIGNAL(signals_changed()),
- this, SLOT(on_signals_changed()));
-
- connect(&_view, SIGNAL(signals_moved()),
- this, SLOT(on_signals_moved()));
-
- // Trigger the initial event manually. The default device has signals
- // which were created before this object came into being
- on_signals_changed();
-}
-
-int Viewport::get_total_height() const
-{
- int h = 0;
- const vector< shared_ptr<Trace> > traces(_view.get_traces());
- for (const shared_ptr<Trace> t : traces) {
- assert(t);
- h = max(t->get_v_offset() + View::SignalHeight, h);
- }
-
- return h;
-}
-
-void Viewport::paintEvent(QPaintEvent*)
-{
- const vector< shared_ptr<Trace> > traces(_view.get_traces());
-
- QPainter p(this);
- p.setRenderHint(QPainter::Antialiasing);
-
- if (_view.cursors_shown())
- _view.cursors().draw_viewport_background(p, rect());
-
- // Plot the signal
- for (const shared_ptr<Trace> t : traces)
- {
- assert(t);
- t->paint_back(p, 0, width());
- }
-
- for (const shared_ptr<Trace> t : traces)
- t->paint_mid(p, 0, width());
-
- for (const shared_ptr<Trace> t : traces)
- t->paint_fore(p, 0, width());
-
- if (_view.cursors_shown())
- _view.cursors().draw_viewport_foreground(p, rect());
-
- p.end();
-}
-
-bool Viewport::event(QEvent *event)
-{
- switch (event->type()) {
- case QEvent::TouchBegin:
- case QEvent::TouchUpdate:
- case QEvent::TouchEnd:
- if (touchEvent(static_cast<QTouchEvent *>(event)))
- return true;
- break;
-
- default:
- break;
- }
-
- return QWidget::event(event);
-}
-
-void Viewport::mousePressEvent(QMouseEvent *event)
-{
- assert(event);
-
- if (event->button() == Qt::LeftButton) {
- _mouse_down_point = event->pos();
- _mouse_down_offset = _view.offset();
- _mouse_down_valid = true;
- }
-}
-
-void Viewport::mouseReleaseEvent(QMouseEvent *event)
-{
- assert(event);
-
- if (event->button() == Qt::LeftButton)
- _mouse_down_valid = false;
-}
-
-void Viewport::mouseMoveEvent(QMouseEvent *event)
-{
- assert(event);
-
- if (event->buttons() & Qt::LeftButton) {
- if (!_mouse_down_valid) {
- _mouse_down_point = event->pos();
- _mouse_down_offset = _view.offset();
- _mouse_down_valid = true;
- }
-
- _view.set_scale_offset(_view.scale(),
- _mouse_down_offset +
- (_mouse_down_point - event->pos()).x() *
- _view.scale());
- }
-}
-
-void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
-{
- assert(event);
-
- if (event->buttons() & Qt::LeftButton)
- _view.zoom(2.0, event->x());
- else if (event->buttons() & Qt::RightButton)
- _view.zoom(-2.0, event->x());
-}
-
-void Viewport::wheelEvent(QWheelEvent *event)
-{
- assert(event);
-
- if (event->orientation() == Qt::Vertical) {
- // Vertical scrolling is interpreted as zooming in/out
- _view.zoom(event->delta() / 120, event->x());
- } else if (event->orientation() == Qt::Horizontal) {
- // Horizontal scrolling is interpreted as moving left/right
- _view.set_scale_offset(_view.scale(),
- event->delta() * _view.scale()
- + _view.offset());
- }
-}
-
-bool Viewport::touchEvent(QTouchEvent *event)
-{
- QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
-
- if (touchPoints.count() != 2) {
- _pinch_zoom_active = false;
- return false;
- }
-
- const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
- const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
-
- if (!_pinch_zoom_active ||
- (event->touchPointStates() & Qt::TouchPointPressed)) {
- _pinch_offset0 = _view.offset() + _view.scale() * touchPoint0.pos().x();
- _pinch_offset1 = _view.offset() + _view.scale() * touchPoint1.pos().x();
- _pinch_zoom_active = true;
- }
-
- double w = touchPoint1.pos().x() - touchPoint0.pos().x();
- if (abs(w) >= 1.0) {
- double scale = (_pinch_offset1 - _pinch_offset0) / w;
- if (scale < 0)
- scale = -scale;
- double offset = _pinch_offset0 - touchPoint0.pos().x() * scale;
- if (scale > 0)
- _view.set_scale_offset(scale, offset);
- }
-
- if (event->touchPointStates() & Qt::TouchPointReleased) {
- _pinch_zoom_active = false;
-
- if (touchPoint0.state() & Qt::TouchPointReleased) {
- // Primary touch released
- _mouse_down_valid = false;
- } else {
- // Update the mouse down fields so that continued
- // dragging with the primary touch will work correctly
- _mouse_down_point = touchPoint0.pos().toPoint();
- _mouse_down_offset = _view.offset();
- _mouse_down_valid = true;
- }
- }
-
- return true;
-}
-
-void Viewport::on_signals_changed()
-{
- const vector< shared_ptr<Trace> > traces(_view.get_traces());
- for (shared_ptr<Trace> t : traces) {
- assert(t);
- connect(t.get(), SIGNAL(visibility_changed()),
- this, SLOT(update()));
- }
-}
-
-void Viewport::on_signals_moved()
-{
- update();
-}
-
-} // namespace view
-} // namespace pv
projects / pulseview.git / blobdiff