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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// Description: Windows Button Proxy
using System;
using System.Windows;
using MS.Win32;
namespace MS.Internal.AutomationProxies
{
class WindowsGrip: ProxyFragment
{
// ------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
public WindowsGrip (IntPtr hwnd, ProxyHwnd parent, int item)
: base( hwnd, parent, item)
{
_sType = SR.LocalizedControlTypeGrip;
_sAutomationId = "Window.Grip"; // This string is a non-localizable string
}
#endregion
//------------------------------------------------------
//
// Patterns Implementation
//
//------------------------------------------------------
#region ProxySimple Interface
/// <summary>
/// Gets the bounding rectangle for this element
/// </summary>
internal override Rect BoundingRectangle
{
get
{
if (IsGripPresent(_hwnd, false))
{
NativeMethods.Win32Rect client = new NativeMethods.Win32Rect();
if (Misc.GetClientRectInScreenCoordinates(_hwnd, ref client))
{
NativeMethods.SIZE sizeGrip = GetGripSize(_hwnd, false);
if (Misc.IsLayoutRTL(_hwnd))
{
return new Rect(client.left - sizeGrip.cx, client.bottom, sizeGrip.cx, sizeGrip.cy);
}
else
{
return new Rect(client.right, client.bottom, sizeGrip.cx, sizeGrip.cy);
}
}
}
return Rect.Empty;
}
}
#endregion
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
static internal bool IsGripPresent(IntPtr hwnd, bool onStatusBar)
{
NativeMethods.Win32Rect client = new NativeMethods.Win32Rect();
if (!Misc.GetClientRectInScreenCoordinates(hwnd, ref client))
{
return false;
}
// According to the documentation of GetClientRect, the left and top members are zero. So if
// they are negitive the control must be minimized, therefore the grip is not present.
if (client.left < 0 && client.top < 0 )
{
return false;
}
NativeMethods.SIZE sizeGrip = GetGripSize(hwnd, onStatusBar);
if (!onStatusBar)
{
// When not on a status bar the grip should be out side of the client area.
sizeGrip.cx *= -1;
sizeGrip.cy *= -1;
}
if (Misc.IsLayoutRTL(hwnd))
{
int x = client.left + (int)(sizeGrip.cx / 2);
int y = client.bottom - (int)(sizeGrip.cy / 2);
int hit = Misc.ProxySendMessageInt(hwnd, NativeMethods.WM_NCHITTEST, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
return hit == NativeMethods.HTBOTTOMLEFT;
}
else
{
int x = client.right - (int)(sizeGrip.cx / 2);
int y = client.bottom - (int)(sizeGrip.cy / 2);
int hit = Misc.ProxySendMessageInt(hwnd, NativeMethods.WM_NCHITTEST, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
return hit == NativeMethods.HTBOTTOMRIGHT;
}
}
internal static NativeMethods.SIZE GetGripSize(IntPtr hwnd, bool onStatusBar)
{
using (ThemePart themePart = new ThemePart(hwnd, onStatusBar ? "STATUS" : "SCROLLBAR"))
{
return themePart.Size(onStatusBar ? (int)ThemePart.STATUSPARTS.SP_GRIPPER : (int)ThemePart.SCROLLBARPARTS.SBP_SIZEBOX, 0);
}
}
#endregion
}
}
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