int CGUIFixedListContainer::GetCursorFromPoint(const CPoint &point, CPoint *itemPoint) const
{
if (!m_focusedLayout || !m_layout)
return -1;
int minCursor, maxCursor;
GetCursorRange(minCursor, maxCursor);
// see if the point is either side of our focus range
float start = (minCursor + 0.2f) * m_layout->Size(m_orientation);
float end = (maxCursor - 0.2f) * m_layout->Size(m_orientation) + m_focusedLayout->Size(m_orientation);
float pos = (m_orientation == VERTICAL) ? point.y : point.x;
if (pos >= start && pos <= end)
{ // select the appropriate item
pos -= minCursor * m_layout->Size(m_orientation);
for (int row = minCursor; row <= maxCursor; row++)
{
const CGUIListItemLayout *layout = (row == GetCursor()) ? m_focusedLayout : m_layout;
if (pos < layout->Size(m_orientation))
{
if (!InsideLayout(layout, point))
return -1;
return row;
}
pos -= layout->Size(m_orientation);
}
}
return -1;
}
void CGUIFixedListContainer::SelectItem(int item)
{
// Check that GetOffset() is valid
ValidateOffset();
// only select an item if it's in a valid range
if (item >= 0 && item < (int)m_items.size())
{
// Select the item requested - we first set the cursor position
// which may be different at either end of the list, then the offset
int minCursor, maxCursor;
GetCursorRange(minCursor, maxCursor);
int cursor;
if ((int)m_items.size() - 1 - item <= maxCursor - m_fixedCursor)
cursor = std::max(m_fixedCursor, maxCursor + item - (int)m_items.size() + 1);
else if (item <= m_fixedCursor - minCursor)
cursor = std::min(m_fixedCursor, minCursor + item);
else
cursor = m_fixedCursor;
if (cursor != GetCursor())
SetContainerMoving(cursor - GetCursor());
SetCursor(cursor);
ScrollToOffset(item - GetCursor());
}
}
void CGUIFixedListContainer::ValidateOffset()
{
if (!m_layout) return;
// ensure our fixed cursor position is valid
if (m_fixedCursor >= m_itemsPerPage)
m_fixedCursor = m_itemsPerPage - 1;
if (m_fixedCursor < 0)
m_fixedCursor = 0;
// compute our minimum and maximum cursor positions
int minCursor, maxCursor;
GetCursorRange(minCursor, maxCursor);
// assure our cursor is between these limits
SetCursor(std::max(GetCursor(), minCursor));
SetCursor(std::min(GetCursor(), maxCursor));
int minOffset, maxOffset;
GetOffsetRange(minOffset, maxOffset);
// and finally ensure our offset is valid
// don't validate offset if we are scrolling in case the tween image exceed <0, 1> range
if (GetOffset() > maxOffset || (!m_scroller.IsScrolling() && m_scroller.GetValue() > maxOffset * m_layout->Size(m_orientation)))
{
SetOffset(std::max(-minCursor, maxOffset));
m_scroller.SetValue(GetOffset() * m_layout->Size(m_orientation));
}
if (GetOffset() < minOffset || (!m_scroller.IsScrolling() && m_scroller.GetValue() < minOffset * m_layout->Size(m_orientation)))
{
SetOffset(minOffset);
m_scroller.SetValue(GetOffset() * m_layout->Size(m_orientation));
}
}
bool CGUIFixedListContainer::GetOffsetRange(int &minOffset, int &maxOffset) const
{
GetCursorRange(minOffset, maxOffset);
minOffset = -minOffset;
maxOffset = m_items.size() - maxOffset - 1;
return true;
}
void CGUIFixedListContainer::ValidateOffset()
{
if (!m_layout) return;
// ensure our fixed cursor position is valid
if (m_fixedCursor >= m_itemsPerPage)
m_fixedCursor = m_itemsPerPage - 1;
if (m_fixedCursor < 0)
m_fixedCursor = 0;
// compute our minimum and maximum cursor positions
int minCursor, maxCursor;
GetCursorRange(minCursor, maxCursor);
// assure our cursor is between these limits
m_cursor = max(m_cursor, minCursor);
m_cursor = min(m_cursor, maxCursor);
// and finally ensure our offset is valid
if (m_offset + maxCursor >= (int)m_items.size() || m_scrollOffset > ((int)m_items.size() - maxCursor - 1) * m_layout->Size(m_orientation))
{
m_offset = m_items.size() - maxCursor - 1;
m_scrollOffset = m_offset * m_layout->Size(m_orientation);
}
if (m_offset < -minCursor || m_scrollOffset < -minCursor * m_layout->Size(m_orientation))
{
m_offset = -minCursor;
m_scrollOffset = m_offset * m_layout->Size(m_orientation);
}
}
bool CGUIFixedListContainer::SelectItemFromPoint(const CPoint &point)
{
if (!m_focusedLayout || !m_layout)
return false;
MarkDirtyRegion();
const float mouse_scroll_speed = 0.25f;
const float mouse_max_amount = 1.5f;
float sizeOfItem = m_layout->Size(m_orientation);
int minCursor, maxCursor;
GetCursorRange(minCursor, maxCursor);
// see if the point is either side of our focus range
float start = (minCursor + 0.2f) * sizeOfItem;
float end = (maxCursor - 0.2f) * sizeOfItem + m_focusedLayout->Size(m_orientation);
float pos = (m_orientation == VERTICAL) ? point.y : point.x;
if (pos < start && GetOffset() > -minCursor)
{ // 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)
{
ScrollToOffset(GetOffset() - 1);
m_analogScrollCount = 0;
}
return true;
}
else if (pos > end && GetOffset() + maxCursor < (int)m_items.size() - 1)
{
if (!InsideLayout(m_layout, point))
return false;
// scroll forward
float amount = std::min((pos - end) / sizeOfItem, mouse_max_amount);
m_analogScrollCount += amount * amount * mouse_scroll_speed;
if (m_analogScrollCount > 1)
{
ScrollToOffset(GetOffset() + 1);
m_analogScrollCount = 0;
}
return true;
}
else
{ // select the appropriate item
int cursor = GetCursorFromPoint(point);
if (cursor < 0)
return false;
// calling SelectItem() here will focus the item and scroll, which isn't really what we're after
SetCursor(cursor);
return true;
}
}
void CGUIFixedListContainer::Scroll(int amount)
{
// increase or decrease the offset within [-minCursor, m_items.size() - maxCursor]
int minCursor, maxCursor;
GetCursorRange(minCursor, maxCursor);
int offset = GetOffset() + amount;
if (offset < -minCursor)
{
offset = -minCursor;
SetCursor(minCursor);
}
if (offset > (int)m_items.size() - 1 - maxCursor)
{
offset = m_items.size() - 1 - maxCursor;
SetCursor(maxCursor);
}
ScrollToOffset(offset);
}
