tracetreeitem.cpp

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/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2013 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 <cassert>

#include "view.hpp"

#include "tracetreeitem.hpp"

namespace pv {
namespace views {
namespace trace {

TraceTreeItem::TraceTreeItem() :
    owner_(nullptr),
    layout_v_offset_(0),
    visual_v_offset_(0),
    v_offset_animation_(this, "visual_v_offset")
{
}

void TraceTreeItem::select(bool select)
{
    ViewItem::select(select);
    owner_->row_item_appearance_changed(true, true);
}

int TraceTreeItem::layout_v_offset() const
{
    return layout_v_offset_;
}

void TraceTreeItem::set_layout_v_offset(int v_offset)
{
    if (layout_v_offset_ == v_offset)
        return;

    layout_v_offset_ = v_offset;

    if (owner_)
        owner_->extents_changed(false, true);
}

int TraceTreeItem::visual_v_offset() const
{
    return visual_v_offset_;
}

void TraceTreeItem::set_visual_v_offset(int v_offset)
{
    visual_v_offset_ = v_offset;

    if (owner_)
        owner_->row_item_appearance_changed(true, true);
}

void TraceTreeItem::force_to_v_offset(int v_offset)
{
    v_offset_animation_.stop();
    layout_v_offset_ = visual_v_offset_ = v_offset;

    if (owner_) {
        owner_->row_item_appearance_changed(true, true);
        owner_->extents_changed(false, true);
    }
}

void TraceTreeItem::animate_to_layout_v_offset()
{
    if (visual_v_offset_ == layout_v_offset_ ||
        (v_offset_animation_.endValue() == layout_v_offset_ &&
        v_offset_animation_.state() == QAbstractAnimation::Running))
        return;

    v_offset_animation_.setDuration(100);
    v_offset_animation_.setStartValue(visual_v_offset_);
    v_offset_animation_.setEndValue(layout_v_offset_);
    v_offset_animation_.setEasingCurve(QEasingCurve::OutQuad);
    v_offset_animation_.start();
}

TraceTreeItemOwner* TraceTreeItem::owner() const
{
    return owner_;
}

void TraceTreeItem::set_owner(TraceTreeItemOwner *owner)
{
    assert(owner_ || owner);
    v_offset_animation_.stop();

    if (owner_) {
        const int owner_offset = owner_->owner_visual_v_offset();
        layout_v_offset_ += owner_offset;
        visual_v_offset_ += owner_offset;
    }

    owner_ = owner;

    if (owner_) {
        const int owner_offset = owner_->owner_visual_v_offset();
        layout_v_offset_ -= owner_offset;
        visual_v_offset_ -= owner_offset;
    }
}

int TraceTreeItem::get_visual_y() const
{
    assert(owner_);
    return visual_v_offset_ + owner_->owner_visual_v_offset();
}

void TraceTreeItem::drag_by(const QPoint &delta)
{
    assert(owner_);
    force_to_v_offset(drag_point_.y() + delta.y() -
        owner_->owner_visual_v_offset());
}

QPoint TraceTreeItem::drag_point(const QRect &rect) const
{
    return QPoint(rect.right(), get_visual_y());
}

} // namespace trace
} // namespace views
} // namespace pv