// ------------------------------------------------------
//
// Private Methods
//
// ------------------------------------------------------
#region Private Methods
// Create a new proxy for one of the scroll bit items
private ProxySimple CreateScrollBitsItem(ScrollBarItem index)
{
// For Scrollbars as standalone controls, make sure that the buttons are not invisible. (office scroll bars)
// Checking is done from the return value of SetScrolBarInfo.
NativeMethods.ScrollBarInfo sbi = new NativeMethods.ScrollBarInfo();
sbi.cbSize = Marshal.SizeOf(sbi.GetType());
if (_sbFlag != NativeMethods.SB_CTL || Misc.GetScrollBarInfo(_hwnd, NativeMethods.OBJID_CLIENT, ref sbi))
{
return(new WindowsScrollBarBits(_hwnd, this, (int)index, _sbFlag));
}
return(null);
}
// Returns a Proxy element corresponding to the specified screen coordinates.
internal override ProxySimple ElementProviderFromPoint(int x, int y)
{
for (ScrollBarItem item = ScrollBarItem.UpArrow; (int)item <= (int)ScrollBarItem.DownArrow; item = (ScrollBarItem)((int)item + 1))
{
NativeMethods.Win32Rect rc = new NativeMethods.Win32Rect(WindowsScrollBarBits.GetBoundingRectangle(_hwnd, this, item, _sbFlag));
if (Misc.PtInRect(ref rc, x, y))
{
return(new WindowsScrollBarBits(_hwnd, this, (int)item, _sbFlag));
}
}
return(this);
}
// Returns the previous sibling element in the raw hierarchy.
// Peripheral controls have always negative values.
// Returns null is no previous.
internal override ProxySimple GetPreviousSibling(ProxySimple child)
{
ScrollBarItem item = (ScrollBarItem)child._item;
if (item != ScrollBarItem.UpArrow)
{
// skip the Large increment/decrement if there is no thumb
if (item == ScrollBarItem.DownArrow && !IsScrollBarWithThumb(_hwnd, _sbFlag))
{
item = ScrollBarItem.UpArrow + 1;
}
return(CreateScrollBitsItem((ScrollBarItem)((int)item - 1)));
}
return(null);
}
// ------------------------------------------------------
//
// Private Methods
//
// ------------------------------------------------------
#region Private Methods
// Create a new proxy for one of the scroll bit items
private ProxySimple CreateScrollBitsItem (ScrollBarItem index)
{
// For Scrollbars as standalone controls, make sure that the buttons are not invisible. (office scroll bars)
// Checking is done from the return value of SetScrolBarInfo.
NativeMethods.ScrollBarInfo sbi = new NativeMethods.ScrollBarInfo ();
sbi.cbSize = Marshal.SizeOf (sbi.GetType ());
if (_sbFlag != NativeMethods.SB_CTL || Misc.GetScrollBarInfo(_hwnd, NativeMethods.OBJID_CLIENT, ref sbi))
{
return new WindowsScrollBarBits (_hwnd, this, (int) index, _sbFlag);
}
return null;
}
