pv/view/rowitem.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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <assert.h>
  22
  23 #include "view.hpp"
  24
  25 #include "rowitem.hpp"
  26
  27 namespace pv {
  28 namespace view {
  29
  30 RowItem::RowItem() :
  31         owner_(NULL),
  32         layout_v_offset_(0),
  33         visual_v_offset_(0),
  34         v_offset_animation_(this, "visual_v_offset")
  35 {
  36 }
  37
  38 int RowItem::layout_v_offset() const
  39 {
  40         return layout_v_offset_;
  41 }
  42
  43 void RowItem::set_layout_v_offset(int v_offset)
  44 {
  45         if (layout_v_offset_ == v_offset)
  46                 return;
  47
  48         layout_v_offset_ = v_offset;
  49
  50         if (owner_)
  51                 owner_->extents_changed(false, true);
  52 }
  53
  54 int RowItem::visual_v_offset() const
  55 {
  56         return visual_v_offset_;
  57 }
  58
  59 void RowItem::set_visual_v_offset(int v_offset)
  60 {
  61         visual_v_offset_ = v_offset;
  62
  63         if (owner_)
  64                 owner_->row_item_appearance_changed(true, true);
  65 }
  66
  67 void RowItem::force_to_v_offset(int v_offset)
  68 {
  69         v_offset_animation_.stop();
  70         layout_v_offset_ = visual_v_offset_ = v_offset;
  71 }
  72
  73 void RowItem::animate_to_layout_v_offset()
  74 {
  75         if (visual_v_offset_ == layout_v_offset_ ||
  76                 (v_offset_animation_.endValue() == layout_v_offset_ &&
  77                 v_offset_animation_.state() == QAbstractAnimation::Running))
  78                 return;
  79
  80         v_offset_animation_.setDuration(100);
  81         v_offset_animation_.setStartValue(visual_v_offset_);
  82         v_offset_animation_.setEndValue(layout_v_offset_);
  83         v_offset_animation_.setEasingCurve(QEasingCurve::OutQuad);
  84         v_offset_animation_.start();
  85 }
  86
  87 RowItemOwner* RowItem::owner() const
  88 {
  89         return owner_;
  90 }
  91
  92 void RowItem::set_owner(RowItemOwner *owner)
  93 {
  94         assert(owner_ || owner);
  95         v_offset_animation_.stop();
  96
  97         if (owner_) {
  98                 const int owner_offset = owner_->owner_visual_v_offset();
  99                 layout_v_offset_ += owner_offset;
 100                 visual_v_offset_ += owner_offset;
 101         }
 102
 103         owner_ = owner;
 104
 105         if (owner_) {
 106                 const int owner_offset = owner_->owner_visual_v_offset();
 107                 layout_v_offset_ -= owner_offset;
 108                 visual_v_offset_ -= owner_offset;
 109         }
 110 }
 111
 112 int RowItem::get_visual_y() const
 113 {
 114         assert(owner_);
 115         return visual_v_offset_ + owner_->owner_visual_v_offset();
 116 }
 117
 118 void RowItem::drag_by(const QPoint &delta)
 119 {
 120         force_to_v_offset(drag_point_.y() + delta.y() -
 121                 owner_->owner_visual_v_offset());
 122 }
 123
 124 QPoint RowItem::point(const QRect &rect) const
 125 {
 126         return QPoint(rect.right(), get_visual_y());
 127 }
 128
 129 void RowItem::hover_point_changed()
 130 {
 131 }
 132
 133 } // namespace view
 134 } // namespace pv