public void TestUnpackParamsAreTheSameAsOriginal()
{
var packager = new CoordsPackager();
var param = new RECT { Left = 1, Top = 2, Right = 3, Bottom = 4 };
var packedParams = packager.PackParams(param);
var result = packager.UnpackParams(packedParams.LParam, packedParams.WParam);
Assert.AreEqual(param, result);
}
public RECT UnpackParams(IntPtr lParam, IntPtr wParam)
{
var p1 = (uint)wParam;
var p2 = (uint)lParam;
var result = new RECT
{
Left = (int) (p1 >> BitsToShift),
Top = (int) (p1 & BitMask),
Right = (int) (p2 >> BitsToShift),
Bottom = (int) (p2 & BitMask)
};
return result;
}
public MessageParams PackParams(RECT rect)
{
// C++ would unpack it like this:
//const unsigned int p1 = (unsigned int)wParam;
//const unsigned int p2 = (unsigned int)lParam;
//buttonsRect.left = p1 >> 16;
//buttonsRect.top = p1 & 0xFFFF;
//buttonsRect.right = p2 >> 16;
//buttonsRect.bottom = p2 & 0xFFFF;
var result = new MessageParams
{
WParam = (IntPtr) ((((uint) rect.Left) << BitsToShift) | (((uint) rect.Top) & BitMask)),
LParam = (IntPtr) ((((uint) rect.Right) << BitsToShift) | (((uint) rect.Bottom) & BitMask))
};
return result;
}
public void TestWidthIsCalculatedCorrectly()
{
var rect = new RECT() { Left = 1, Right = 10 };
Assert.AreEqual(9, rect.Width);
}
public void TestSettingWidthSetsRightCorrectly()
{
var rect = new RECT() { Left = 1, Right = 10 };
rect.Width = 5;
Assert.AreEqual(6, rect.Right);
}
public void TestSettingHeightSetsBottomCorrectly()
{
var rect = new RECT() { Top = 1, Bottom = 10 };
rect.Height = 5;
Assert.AreEqual(6, rect.Bottom);
}
public void TestHeightIsCalculatedCorrectly()
{
var rect = new RECT() { Top = 1, Bottom = 10 };
Assert.AreEqual(9, rect.Height);
}
public static extern uint SendMessage(IntPtr hWnd, int Msg, int wParam, ref RECT lParam);
public static extern bool IntersectRect(out RECT lprcDst, [In] ref RECT lprcSrc1, [In] ref RECT lprcSrc2);
public RECT(RECT rect)
{
Left = rect.Left;
Top = rect.Top;
Right = rect.Right;
Bottom = rect.Bottom;
}
