//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// Retreive the dimension of of UI element
internal NativeMethods.SIZE Size (int iPartId, int iStateId)
{
bool fSuccess = false;
// Default is (0, 0)
NativeMethods.SIZE size = new NativeMethods.SIZE(0, 0);
if (!_hTheme.IsInvalid)
{
unsafe
{
fSuccess = GetThemePartSize(_hTheme, IntPtr.Zero, iPartId, iStateId, IntPtr.Zero, (int)THEMESIZE.TS_TRUE, &size) == IntPtr.Zero;
}
}
// Falls back uses GetSystemMetrics
if (!fSuccess)
{
// dangerous construct, the iPartId might collide.
// When entering an entry, make sure that the ID is not previously used.
// If it is the case, then an extra parameter needs to be added to this method
switch (iPartId)
{
case (int) STATUSPARTS.SP_GRIPPER:
size.cx = UnsafeNativeMethods.GetSystemMetrics (NativeMethods.SM_CXSIZE);
size.cy = UnsafeNativeMethods.GetSystemMetrics (NativeMethods.SM_CXSIZE);
break;
case (int)SCROLLBARPARTS.SBP_SIZEBOX:
size.cx = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXVSCROLL);
size.cy = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYHSCROLL);
break;
case (int)SCROLLBARPARTS.SBP_ARROWBTN:
size.cx = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXHSCROLL);
size.cy = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVSCROLL);
break;
case (int) WINDOWPARTS.WP_MINBUTTON :
case (int) WINDOWPARTS.WP_MAXBUTTON :
case (int) WINDOWPARTS.WP_CLOSEBUTTON :
case (int) WINDOWPARTS.WP_HELPBUTTON :
size.cx = UnsafeNativeMethods.GetSystemMetrics (NativeMethods.SM_CXSIZE);
size.cy = UnsafeNativeMethods.GetSystemMetrics (NativeMethods.SM_CXSIZE);
break;
default:
System.Diagnostics.Debug.Assert (false, "Unsupport Type");
break;
}
}
return size;
}
private NativeMethods.SIZE GetExtent()
{
NativeMethods.SIZE sz = new NativeMethods.SIZE();
_axOleObject.GetExtent(NativeMethods.DVASPECT_CONTENT, sz);
return sz;
}
private NativeMethods.SIZE SetExtent(int width, int height)
{
NativeMethods.SIZE sz = new NativeMethods.SIZE();
sz.cx = width;
sz.cy = height;
bool resetExtents = false;
try
{
_axOleObject.SetExtent(NativeMethods.DVASPECT_CONTENT, sz);
}
catch (COMException)
{
resetExtents = true;
}
if (resetExtents)
{
_axOleObject.GetExtent(NativeMethods.DVASPECT_CONTENT, sz);
try
{
_axOleObject.SetExtent(NativeMethods.DVASPECT_CONTENT, sz);
}
catch (COMException e)
{
Debug.Fail(e.ToString());
}
}
return GetExtent();
}