//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// retrieve bounding rectangle of the listview checkbox
internal static NativeMethods.Win32Rect ListViewCheckBoxRect(IntPtr hwnd, int item)
{
// Rare special case
if (WindowsListView.FullRowSelect(hwnd) && WindowsListView.IsDetailMode(hwnd))
{
// Get listview window rect
NativeMethods.Win32Rect controlRectangle = NativeMethods.Win32Rect.Empty;
if (!Misc.GetWindowRect(hwnd, ref controlRectangle))
{
return(NativeMethods.Win32Rect.Empty);
}
// BOUNDS == SELECTBOUNDS, hence cannot rely on them
// will rely on the ICON or LABEL
// Try icon first since it is the closest to the checkbox
NativeMethods.Win32Rect rc;
if ((WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_ICON, out rc) && rc.left != rc.right) || (WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_LABEL, out rc) && rc.left != rc.right))
{
int right = controlRectangle.left + (rc.left - controlRectangle.left);
return(new NativeMethods.Win32Rect(controlRectangle.left, rc.top, right, rc.bottom));
}
}
else
{
// Very common, simple case
NativeMethods.Win32Rect wholeItem;
if (!WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_BOUNDS, out wholeItem))
{
return(NativeMethods.Win32Rect.Empty);
}
NativeMethods.Win32Rect selectable;
if (!WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_SELECTBOUNDS, out selectable))
{
return(NativeMethods.Win32Rect.Empty);
}
if (Misc.IsControlRTL(hwnd))
{
return(new NativeMethods.Win32Rect(selectable.right, wholeItem.top, wholeItem.right, wholeItem.bottom));
}
else
{
return(new NativeMethods.Win32Rect(wholeItem.left, wholeItem.top, selectable.left, wholeItem.bottom));
}
}
return(NativeMethods.Win32Rect.Empty);
}
internal NativeMethods.Win32Rect CalculateRectNoHeader()
{
NativeMethods.Win32Rect rcLv = NativeMethods.Win32Rect.Empty;
if (!Misc.GetWindowRect(_hwnd, ref rcLv))
{
return(NativeMethods.Win32Rect.Empty);
}
// set top to the top coordinate of the first item
NativeMethods.Win32Rect item;
WindowsListView.GetItemRect(_hwnd, _items[0], NativeMethods.LVIR_BOUNDS, out item);
NativeMethods.Win32Rect groupRc;
groupRc.top = item.top;
// left coordinate defined by the left coordinate of the listview
groupRc.left = rcLv.left;
int count = Count;
// bottom defined by the bottom coordinate of the last item
if (count > 1)
{
// get the rect of the last item in the group
WindowsListView.GetItemRect(_hwnd, _items[count - 1], NativeMethods.LVIR_BOUNDS, out item);
}
groupRc.bottom = item.bottom;
// right coordinate defined by lv.right
groupRc.right = rcLv.right;
// when vertical scrollbar is present take it into account
if (WindowScroll.Scrollable(_hwnd, NativeMethods.SB_VERT))
{
NativeMethods.Win32Rect rc = GetScrollbarRect();
int width = rc.right - rc.left;
if (Misc.IsControlRTL(_hwnd))
{
// Right to left mirroring style
groupRc.left += width;
}
else
{
groupRc.right -= width;
}
}
return(groupRc);
}
// This method returns the count of either columns or rows
// in the Grid.
static private int GetCountOfItemsInDimension(IntPtr hwnd, int groupID, IsNewItemInDimension comparer)
{
// Algorithm:
// Get the rect of the item.
// Compare it using provided "comparer" with the previously obtained rect of the previous item in the grid
// if comparer returns New increase the count
int itemsCount = 0;
GroupManager.GroupInfo groupInfo = GetGroupInfo(hwnd, groupID);
if (groupInfo)
{
int [] items = groupInfo._items;
NativeMethods.Win32Rect rc;
NativeMethods.Win32Rect rcNext;
// get coordinates of the first item in the grid
if (WindowsListView.GetItemRect(hwnd, items[0], NativeMethods.LVIR_BOUNDS, out rc))
{
NewItemInDimension result = NewItemInDimension.New;
itemsCount++; // at least one exist
for (int i = 1; result != NewItemInDimension.Stop && i < groupInfo._count; i++)
{
if (!WindowsListView.GetItemRect(hwnd, items[i], NativeMethods.LVIR_BOUNDS, out rcNext))
{
// Fail to get rc, makes no sense to continue
System.Diagnostics.Debug.Assert(false, "GetCountOfItemsInDimension: failed to get item rect");
return(0);
}
result = comparer(rc, rcNext);
if (result == NewItemInDimension.New)
{
// found a change in the rect
// we either have a new column or new raw
itemsCount++;
// update the rc with the new coordinates
rc = rcNext;
}
}
}
return(itemsCount);
}
return(-1);
}
// Obtain clickable point on the listviewitem
// in the case when one doesnot exist return false
private bool GetListviewitemClickablePoint(out NativeMethods.Win32Point clickPoint)
{
// When this method is called, lv was already scrolled vertically
// hence item is visible veritcally
clickPoint.x = clickPoint.y = 0;
NativeMethods.Win32Rect itemRectangle;
// Obtain rectangle
if (!WindowsListView.GetItemRect(_hwnd, _item, NativeMethods.LVIR_LABEL, out itemRectangle))
{
return(false);
}
if (WindowsListView.IsDetailMode(_hwnd) && !WindowsListView.FullRowSelect(_hwnd))
{
// LVS_REPORT - possible that we may need to scroll horizontaly
//
NativeMethods.Win32Point pt = new NativeMethods.Win32Point(itemRectangle.left, 0);
if (!Misc.MapWindowPoints(IntPtr.Zero, _hwnd, ref pt, 1))
{
return(false);
}
// In client coordinates, hence negative indicates that item is to the left of lv client area
if (pt.x < 0)
{
((IScrollItemProvider)this).ScrollIntoView();
if (!WindowsListView.GetItemRect(_hwnd, _item, NativeMethods.LVIR_LABEL, out itemRectangle))
{
return(false);
}
}
}
clickPoint.x = Math.Min((itemRectangle.left + 5), (itemRectangle.left + itemRectangle.right) / 2);
clickPoint.y = (itemRectangle.top + itemRectangle.bottom) / 2;
return(true);
}
//------------------------------------------------------
//
// IComparer
//
//------------------------------------------------------
#region IComparer
int IComparer.Compare(object x, object y)
{
int item1 = (int)x;
int item2 = (int)y;
// get the rect of 2 items
NativeMethods.Win32Rect rc1;
WindowsListView.GetItemRect(_hwnd, item1, NativeMethods.LVIR_BOUNDS, out rc1);
NativeMethods.Win32Rect rc2;
WindowsListView.GetItemRect(_hwnd, item2, NativeMethods.LVIR_BOUNDS, out rc2);
// compare rectangles
if (rc1.left < rc2.left || rc1.top < rc2.top)
{
return(-1);
}
else if (rc1.left != rc2.left || rc1.top != rc2.top)
{
return(1);
}
return(0);
}