--- /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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <limits>
+
+#include "signal.hpp"
+#include "view.hpp"
+#include "viewitempaintparams.hpp"
+#include "viewport.hpp"
+
+#include <pv/session.hpp>
+
+#include <QMouseEvent>
+
+#include <QDebug>
+
+using std::abs;
+using std::back_inserter;
+using std::copy;
+using std::dynamic_pointer_cast;
+using std::none_of; // Used in assert()s.
+using std::shared_ptr;
+using std::stable_sort;
+using std::vector;
+
+namespace pv {
+namespace views {
+namespace trace {
+
+Viewport::Viewport(View &parent) :
+ ViewWidget(parent),
+ pinch_zoom_active_(false)
+{
+ setAutoFillBackground(true);
+ setBackgroundRole(QPalette::Base);
+}
+
+shared_ptr<ViewItem> Viewport::get_mouse_over_item(const QPoint &pt)
+{
+ const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
+ const vector< shared_ptr<ViewItem> > items(this->items());
+ for (auto i = items.rbegin(); i != items.rend(); i++)
+ if ((*i)->enabled() && (*i)->hit_box_rect(pp).contains(pt))
+ return *i;
+ return nullptr;
+}
+
+void Viewport::item_hover(const shared_ptr<ViewItem> &item)
+{
+ if (item && item->is_draggable())
+ setCursor(dynamic_pointer_cast<RowItem>(item) ?
+ Qt::SizeVerCursor : Qt::SizeHorCursor);
+ else
+ unsetCursor();
+}
+
+void Viewport::drag()
+{
+ drag_offset_ = view_.offset();
+ drag_v_offset_ = view_.owner_visual_v_offset();
+}
+
+void Viewport::drag_by(const QPoint &delta)
+{
+ if (drag_offset_ == boost::none)
+ return;
+
+ view_.set_scale_offset(view_.scale(),
+ (*drag_offset_ - delta.x() * view_.scale()));
+
+ view_.set_v_offset(-drag_v_offset_ - delta.y());
+}
+
+void Viewport::drag_release()
+{
+ drag_offset_ = boost::none;
+}
+
+vector< shared_ptr<ViewItem> > Viewport::items()
+{
+ vector< shared_ptr<ViewItem> > items;
+ const vector< shared_ptr<ViewItem> > view_items(
+ view_.list_by_type<ViewItem>());
+ copy(view_items.begin(), view_items.end(), back_inserter(items));
+ const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
+ copy(time_items.begin(), time_items.end(), back_inserter(items));
+ return items;
+}
+
+bool Viewport::touch_event(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()).convert_to<double>();
+ pinch_offset1_ = (view_.offset() + view_.scale() * touchPoint1.pos().x()).convert_to<double>();
+ pinch_zoom_active_ = true;
+ }
+
+ double w = touchPoint1.pos().x() - touchPoint0.pos().x();
+ if (abs(w) >= 1.0) {
+ const double scale =
+ fabs((pinch_offset1_ - pinch_offset0_) / w);
+ 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
+ drag_release();
+ } else {
+ // Update the mouse down fields so that continued
+ // dragging with the primary touch will work correctly
+ mouse_down_point_ = touchPoint0.pos().toPoint();
+ drag();
+ }
+ }
+
+ return true;
+}
+
+void Viewport::paintEvent(QPaintEvent*)
+{
+ typedef void (ViewItem::*LayerPaintFunc)(
+ QPainter &p, ViewItemPaintParams &pp);
+ LayerPaintFunc layer_paint_funcs[] = {
+ &ViewItem::paint_back, &ViewItem::paint_mid,
+ &ViewItem::paint_fore, nullptr};
+
+ vector< shared_ptr<RowItem> > row_items(view_.list_by_type<RowItem>());
+ assert(none_of(row_items.begin(), row_items.end(),
+ [](const shared_ptr<RowItem> &r) { return !r; }));
+
+ stable_sort(row_items.begin(), row_items.end(),
+ [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
+ return a->point(QRect()).y() < b->point(QRect()).y(); });
+
+ const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
+ assert(none_of(time_items.begin(), time_items.end(),
+ [](const shared_ptr<TimeItem> &t) { return !t; }));
+
+ QPainter p(this);
+ p.setRenderHint(QPainter::Antialiasing);
+
+ for (LayerPaintFunc *paint_func = layer_paint_funcs;
+ *paint_func; paint_func++) {
+ ViewItemPaintParams time_pp(rect(), view_.scale(), view_.offset());
+ for (const shared_ptr<TimeItem> t : time_items)
+ (t.get()->*(*paint_func))(p, time_pp);
+
+ ViewItemPaintParams row_pp(rect(), view_.scale(), view_.offset());
+ for (const shared_ptr<RowItem> r : row_items)
+ (r.get()->*(*paint_func))(p, row_pp);
+ }
+
+ p.end();
+}
+
+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) {
+ if (event->modifiers() & Qt::ControlModifier) {
+ // Vertical scrolling with the control key pressed
+ // is intrepretted as vertical scrolling
+ view_.set_v_offset(-view_.owner_visual_v_offset() -
+ (event->delta() * height()) / (8 * 120));
+ } else {
+ // Vertical scrolling is interpreted as zooming in/out
+ view_.zoom(event->delta() / 120.0, 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());
+ }
+}
+
+} // namespace trace
+} // namespace views
+} // namespace pv
projects / pulseview.git / blobdiff