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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: Win32 Spinner Proxy
using System;
using System.Collections;
using System.Text;
using System.ComponentModel;
using System.Windows.Automation;
using System.Windows.Automation.Provider;
using System.Windows;
using MS.Win32;
namespace MS.Internal.AutomationProxies
{
// Proxy for a Windows NumericUpDown control with Windows Edit control, called a Spinner
class WindowsSpinner : ProxyHwnd, IRangeValueProvider
{
// ------------------------------------------------------
//
// Constructors
//
// ------------------------------------------------------
#region Constructors
// Contructor for WindownsSpinner class. Calls the base class constructor.
internal WindowsSpinner(IntPtr hwndUpDown, IntPtr hwndEdit, ProxyFragment parent, int item)
: base(hwndUpDown, parent, item)
{
_elEdit = new WindowsEditBox(hwndEdit, this, 0);
_elUpDown = new WindowsUpDown(hwndUpDown, this, 0);
// Set the strings to return properly the properties.
_cControlType = ControlType.Spinner;
// support for events
_createOnEvent = new WinEventTracker.ProxyRaiseEvents(RaiseEvents);
}
#endregion Constructors
#region Proxy Create
// Static Create method called by UIAutomation to create this proxy.
// returns null if unsuccessful
internal static IRawElementProviderSimple Create(IntPtr hwnd, int idChild, int idObject)
{
return Create(hwnd, idChild);
}
internal static IRawElementProviderSimple Create(IntPtr hwnd, int idChild)
{
// Something is wrong if idChild is not zero
ArgumentOutOfRangeException.ThrowIfNotEqual(idChild, 0);
IntPtr hwndBuddy;
try
{
// Only use spinner class if we find a buddy that's an EDIT, otherwise return
// null to defer to the WindowsUpDown entry in the proxy table
hwndBuddy = Misc.ProxySendMessage(hwnd, NativeMethods.UDM_GETBUDDY, IntPtr.Zero, IntPtr.Zero);
if (hwndBuddy == IntPtr.Zero)
{
return null;
}
if (Misc.ProxyGetClassName(hwndBuddy).IndexOf("EDIT", StringComparison.OrdinalIgnoreCase) == -1)
{
return null;
}
}
catch (ElementNotAvailableException)
{
return null;
}
return new WindowsSpinner(hwnd, hwndBuddy, null, 0);
}
// Static Create method called by the event tracker system
internal static void RaiseEvents(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
if (idObject == NativeMethods.OBJID_VSCROLL || idObject == NativeMethods.OBJID_HSCROLL)
{
return;
}
// ChildId will be non-0 if the event is due to operating on the updown part of the spinner.
// Events on non-content parts of a control are not necessary so don't raise an event in that case.
if ( idChild != 0 )
{
return;
}
ProxySimple ps = (ProxySimple)Create( hwnd, idChild, idObject );
if ( ps == null )
return;
ps.DispatchEvents( eventId, idProp, idObject, idChild );
}
#endregion Proxy Create
//------------------------------------------------------
//
// Patterns Implementation
//
//------------------------------------------------------
#region ProxySimple Interface
// Returns a pattern interface if supported.
internal override object GetPatternProvider (AutomationPattern iid)
{
return (iid == RangeValuePattern.Pattern) ? this : null;
}
// Gets the bounding rectangle for this element
internal override Rect BoundingRectangle
{
get
{
Rect rcUpDown = _elUpDown.BoundingRectangle;
Rect rcEdit = _elEdit.BoundingRectangle;
return Rect.Union(rcEdit, rcUpDown);
}
}
internal override object GetElementProperty(AutomationProperty idProp)
{
if (idProp == AutomationElement.ClickablePointProperty)
{
return _elEdit.GetElementProperty(idProp);
}
else if (idProp == AutomationElement.HasKeyboardFocusProperty)
{
return _elEdit.GetElementProperty(idProp);
}
return base.GetElementProperty(idProp);
}
#endregion ProxySimple Interface
#region ProxyFragment Interface
// Returns a Proxy element corresponding to the specified screen coordinates.
internal override ProxySimple ElementProviderFromPoint(int x, int y)
{
Rect rcUpDown = _elUpDown.BoundingRectangle;
Rect rcEdit = _elEdit.BoundingRectangle;
Point pt = new Point(x, y);
if (rcUpDown.Contains(pt))
{
return _elUpDown.ElementProviderFromPoint(x, y);
}
else if (rcEdit.Contains(pt))
{
return this;
}
return base.ElementProviderFromPoint(x, y);
}
// Returns the next sibling element in the raw hierarchy.
// Peripheral controls have always negative values.
// Returns null if no next child.
internal override ProxySimple GetNextSibling(ProxySimple child)
{
return _elUpDown.GetNextSibling(child);
}
// 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)
{
return _elUpDown.GetPreviousSibling(child);
}
// Returns the first child element in the raw hierarchy.
internal override ProxySimple GetFirstChild()
{
return _elUpDown.GetFirstChild();
}
// Returns the last child element in the raw hierarchy.
internal override ProxySimple GetLastChild()
{
return _elUpDown.GetLastChild();
}
#endregion
#region RangeValue Pattern
// Sets a new position for the edit part of the spinner.
void IRangeValueProvider.SetValue (double obj)
{
((IRangeValueProvider)_elUpDown).SetValue(obj);
}
// Request to get the value that this UI element is representing in a native format
double IRangeValueProvider.Value
{
get
{
return ((IRangeValueProvider)_elUpDown).Value;
}
}
bool IRangeValueProvider.IsReadOnly
{
get
{
return (bool)((IRangeValueProvider)_elUpDown).IsReadOnly &&
(bool)((IValueProvider)_elEdit).IsReadOnly;
}
}
double IRangeValueProvider.Maximum
{
get
{
return ((IRangeValueProvider) _elUpDown).Maximum;
}
}
double IRangeValueProvider.Minimum
{
get
{
return ((IRangeValueProvider) _elUpDown).Minimum;
}
}
double IRangeValueProvider.SmallChange
{
get
{
return ((IRangeValueProvider)_elUpDown).SmallChange;
}
}
double IRangeValueProvider.LargeChange
{
get
{
return ((IRangeValueProvider)_elUpDown).LargeChange;
}
}
#endregion RangeValuePattern
// ------------------------------------------------------
//
// Internal methods
//
// ------------------------------------------------------
#region Internal Methods
// if there is an UpDown control that its buddy window is the same as the given edit hwnd
// the edit is part of the spinner.
internal static bool IsSpinnerEdit(IntPtr hwnd)
{
return GetUpDownFromEdit(hwnd) != IntPtr.Zero;
}
// Try to find a sibling of the edit control that is an UpDown control that has the
// edit contol as its buddy window. If one is found return the hwnd of the UpDown control.
internal static IntPtr GetUpDownFromEdit(IntPtr hwnd)
{
IntPtr hwndParent = Misc.GetParent(hwnd);
if (hwndParent != IntPtr.Zero)
{
IntPtr hwndChild = Misc.GetWindow(hwndParent, NativeMethods.GW_CHILD);
while (hwndChild != IntPtr.Zero)
{
string className = Misc.ProxyGetClassName(hwndChild);
if (className.IndexOf("msctls_updown32", StringComparison.OrdinalIgnoreCase) != -1)
{
IntPtr hwndBuddy = Misc.ProxySendMessage(hwndChild, NativeMethods.UDM_GETBUDDY, IntPtr.Zero, IntPtr.Zero);
if (hwnd == hwndBuddy)
{
return hwndChild;
}
}
hwndChild = Misc.GetWindow(hwndChild, NativeMethods.GW_HWNDNEXT);
}
}
return IntPtr.Zero;
}
#endregion Internal Methods
// ------------------------------------------------------
//
// Private Fields
//
// ------------------------------------------------------
#region Private Fields
private WindowsEditBox _elEdit;
private WindowsUpDown _elUpDown;
#endregion
}
}
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