pv/views/trace/tracetreeitem.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <cassert>
  21
  22 #include "view.hpp"
  23
  24 #include "tracetreeitem.hpp"
  25
  26 namespace pv {
  27 namespace views {
  28 namespace trace {
  29
  30 TraceTreeItem::TraceTreeItem() :
  31         owner_(nullptr),
  32         layout_v_offset_(0),
  33         visual_v_offset_(0),
  34         v_offset_animation_(this, "visual_v_offset")
  35 {
  36 }
  37
  38 void TraceTreeItem::select(bool select)
  39 {
  40         ViewItem::select(select);
  41         owner_->row_item_appearance_changed(true, true);
  42 }
  43
  44 int TraceTreeItem::layout_v_offset() const
  45 {
  46         return layout_v_offset_;
  47 }
  48
  49 void TraceTreeItem::set_layout_v_offset(int v_offset)
  50 {
  51         if (layout_v_offset_ == v_offset)
  52                 return;
  53
  54         layout_v_offset_ = v_offset;
  55
  56         if (owner_)
  57                 owner_->extents_changed(false, true);
  58 }
  59
  60 int TraceTreeItem::visual_v_offset() const
  61 {
  62         return visual_v_offset_;
  63 }
  64
  65 void TraceTreeItem::set_visual_v_offset(int v_offset)
  66 {
  67         visual_v_offset_ = v_offset;
  68
  69         if (owner_)
  70                 owner_->row_item_appearance_changed(true, true);
  71 }
  72
  73 void TraceTreeItem::force_to_v_offset(int v_offset)
  74 {
  75         v_offset_animation_.stop();
  76         layout_v_offset_ = visual_v_offset_ = v_offset;
  77
  78         if (owner_) {
  79                 owner_->row_item_appearance_changed(true, true);
  80                 owner_->extents_changed(false, true);
  81         }
  82 }
  83
  84 void TraceTreeItem::animate_to_layout_v_offset()
  85 {
  86         if (visual_v_offset_ == layout_v_offset_ ||
  87                 (v_offset_animation_.endValue() == layout_v_offset_ &&
  88                 v_offset_animation_.state() == QAbstractAnimation::Running))
  89                 return;
  90
  91         v_offset_animation_.setDuration(100);
  92         v_offset_animation_.setStartValue(visual_v_offset_);
  93         v_offset_animation_.setEndValue(layout_v_offset_);
  94         v_offset_animation_.setEasingCurve(QEasingCurve::OutQuad);
  95         v_offset_animation_.start();
  96 }
  97
  98 TraceTreeItemOwner* TraceTreeItem::owner() const
  99 {
 100         return owner_;
 101 }
 102
 103 void TraceTreeItem::set_owner(TraceTreeItemOwner *owner)
 104 {
 105         assert(owner_ || owner);
 106         v_offset_animation_.stop();
 107
 108         if (owner_) {
 109                 const int owner_offset = owner_->owner_visual_v_offset();
 110                 layout_v_offset_ += owner_offset;
 111                 visual_v_offset_ += owner_offset;
 112         }
 113
 114         owner_ = owner;
 115
 116         if (owner_) {
 117                 const int owner_offset = owner_->owner_visual_v_offset();
 118                 layout_v_offset_ -= owner_offset;
 119                 visual_v_offset_ -= owner_offset;
 120         }
 121 }
 122
 123 int TraceTreeItem::get_visual_y() const
 124 {
 125         assert(owner_);
 126         return visual_v_offset_ + owner_->owner_visual_v_offset();
 127 }
 128
 129 void TraceTreeItem::drag_by(const QPoint &delta)
 130 {
 131         assert(owner_);
 132         force_to_v_offset(drag_point_.y() + delta.y() -
 133                 owner_->owner_visual_v_offset());
 134 }
 135
 136 QPoint TraceTreeItem::drag_point(const QRect &rect) const
 137 {
 138         return QPoint(rect.right(), get_visual_y());
 139 }
 140
 141 } // namespace trace
 142 } // namespace views
 143 } // namespace pv