Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: atv2
Fetching contributors…

Cannot retrieve contributors at this time

file 251 lines (230 sloc) 7.003 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251
/*
* Copyright (C) 2005-2008 Team XBMC
* http://www.xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/

#include "GUIWrappingListContainer.h"
#include "FileItem.h"
#include "Key.h"
#include "utils/log.h"

CGUIWrappingListContainer::CGUIWrappingListContainer(int parentID, int controlID, float posX, float posY, float width, float height, ORIENTATION orientation, int scrollTime, int preloadItems, int fixedPosition)
    : CGUIBaseContainer(parentID, controlID, posX, posY, width, height, orientation, scrollTime, preloadItems)
{
  m_cursor = fixedPosition;
  ControlType = GUICONTAINER_WRAPLIST;
  m_type = VIEW_TYPE_LIST;
  m_extraItems = 0;
}

CGUIWrappingListContainer::~CGUIWrappingListContainer(void)
{
}

void CGUIWrappingListContainer::UpdatePageControl(int offset)
{
  if (m_pageControl)
  { // tell our pagecontrol (scrollbar or whatever) to update (offset it by our cursor position)
    CGUIMessage msg(GUI_MSG_ITEM_SELECT, GetID(), m_pageControl, CorrectOffset(offset, m_cursor));
    SendWindowMessage(msg);
  }
}

bool CGUIWrappingListContainer::OnAction(const CAction &action)
{
  switch (action.GetID())
  {
  case ACTION_PAGE_UP:
    Scroll(-m_itemsPerPage);
    return true;
  case ACTION_PAGE_DOWN:
    Scroll(m_itemsPerPage);
    return true;
    // smooth scrolling (for analog controls)
  case ACTION_SCROLL_UP:
    {
      m_analogScrollCount += action.GetAmount() * action.GetAmount();
      bool handled = false;
      while (m_analogScrollCount > 0.4)
      {
        handled = true;
        m_analogScrollCount -= 0.4f;
        Scroll(-1);
      }
      return handled;
    }
    break;
  case ACTION_SCROLL_DOWN:
    {
      m_analogScrollCount += action.GetAmount() * action.GetAmount();
      bool handled = false;
      while (m_analogScrollCount > 0.4)
      {
        handled = true;
        m_analogScrollCount -= 0.4f;
        Scroll(1);
      }
      return handled;
    }
    break;
  }
  return CGUIBaseContainer::OnAction(action);
}

bool CGUIWrappingListContainer::OnMessage(CGUIMessage& message)
{
  if (message.GetControlId() == GetID() )
  {
    if (message.GetMessage() == GUI_MSG_ITEM_SELECT)
    {
      SelectItem(message.GetParam1());
      return true;
    }
    else if (message.GetMessage() == GUI_MSG_PAGE_CHANGE)
    {
      if (message.GetSenderId() == m_pageControl && IsVisible())
      { // offset by our cursor position
        message.SetParam1(message.GetParam1() - m_cursor);
      }
    }
  }
  return CGUIBaseContainer::OnMessage(message);
}

bool CGUIWrappingListContainer::MoveUp(bool wrapAround)
{
  Scroll(-1);
  return true;
}

bool CGUIWrappingListContainer::MoveDown(bool wrapAround)
{
  Scroll(+1);
  return true;
}

// scrolls the said amount
void CGUIWrappingListContainer::Scroll(int amount)
{
  ScrollToOffset(m_offset + amount);
}

void CGUIWrappingListContainer::ValidateOffset()
{
  if (m_itemsPerPage <= (int)m_items.size())
    return;

  // no need to check the range here, but we need to check we have
  // more items than slots.
  ResetExtraItems();
  if (m_items.size())
  {
    unsigned int numItems = m_items.size();
    while (m_items.size() < (unsigned int)m_itemsPerPage)
    {
      // add additional copies of items, as we require extras at render time
      for (unsigned int i = 0; i < numItems; i++)
      {
        m_items.push_back(CGUIListItemPtr(m_items[i]->Clone()));
        m_extraItems++;
      }
    }
  }
}

int CGUIWrappingListContainer::CorrectOffset(int offset, int cursor) const
{
  if (m_items.size())
  {
    int correctOffset = (offset + cursor) % (int)m_items.size();
    if (correctOffset < 0) correctOffset += m_items.size();
    return correctOffset;
  }
  return 0;
}

int CGUIWrappingListContainer::GetSelectedItem() const
{
  if (m_items.size() > m_extraItems)
  {
    int numItems = (int)(m_items.size() - m_extraItems);
    int correctOffset = (m_offset + m_cursor) % numItems;
    if (correctOffset < 0) correctOffset += numItems;
    return correctOffset;
  }
  return 0;
}

bool CGUIWrappingListContainer::SelectItemFromPoint(const CPoint &point)
{
  if (!m_focusedLayout || !m_layout)
    return false;

  const float mouse_scroll_speed = 0.05f;
  const float mouse_max_amount = 1.0f; // max speed: 1 item per frame
  float sizeOfItem = m_layout->Size(m_orientation);
  // see if the point is either side of our focused item
  float start = m_cursor * sizeOfItem;
  float end = start + m_focusedLayout->Size(m_orientation);
  float pos = (m_orientation == VERTICAL) ? point.y : point.x;
  if (pos < start - 0.5f * sizeOfItem)
  { // scroll backward
    if (!InsideLayout(m_layout, point))
      return false;
    float amount = std::min((start - pos) / sizeOfItem, mouse_max_amount);
    m_analogScrollCount += amount * amount * mouse_scroll_speed;
    if (m_analogScrollCount > 1)
    {
      Scroll(-1);
      m_analogScrollCount-=1.0f;
    }
    return true;
  }
  else if (pos > end + 0.5f * sizeOfItem)
  { // scroll forward
    if (!InsideLayout(m_layout, point))
      return false;

    float amount = std::min((pos - end) / sizeOfItem, mouse_max_amount);
    m_analogScrollCount += amount * amount * mouse_scroll_speed;
    if (m_analogScrollCount > 1)
    {
      Scroll(1);
      m_analogScrollCount-=1.0f;
    }
    return true;
  }
  return InsideLayout(m_focusedLayout, point);
}

void CGUIWrappingListContainer::SelectItem(int item)
{
  if (item >= 0 && item < (int)m_items.size())
    ScrollToOffset(item - m_cursor);
}

void CGUIWrappingListContainer::ResetExtraItems()
{
  // delete any extra items
  if (m_extraItems)
    m_items.erase(m_items.begin() + m_items.size() - m_extraItems, m_items.end());
  m_extraItems = 0;
}

void CGUIWrappingListContainer::Reset()
{
  ResetExtraItems();
  CGUIBaseContainer::Reset();
}

int CGUIWrappingListContainer::GetCurrentPage() const
{
  int offset = CorrectOffset(m_offset, m_cursor);
  if (offset + m_itemsPerPage - m_cursor >= (int)GetRows()) // last page
    return (GetRows() + m_itemsPerPage - 1) / m_itemsPerPage;
  return offset / m_itemsPerPage + 1;
}

void CGUIWrappingListContainer::SetPageControlRange()
{
  if (m_pageControl)
  {
    CGUIMessage msg(GUI_MSG_LABEL_RESET, GetID(), m_pageControl, m_itemsPerPage, m_items.size() + m_itemsPerPage - 1);
    SendWindowMessage(msg);
  }
}
Something went wrong with that request. Please try again.