|
// 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 ListViewItemCheckbox proxy
//
using System;
using System.Windows.Automation;
using System.Windows.Automation.Provider;
using System.Windows;
using MS.Win32;
namespace MS.Internal.AutomationProxies
{
class ListViewItemCheckbox: ProxySimple, IToggleProvider
{
// ------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
internal ListViewItemCheckbox (IntPtr hwnd, ProxyFragment parent, int item, int checkbox) :
base (hwnd, parent, checkbox)
{
_cControlType = ControlType.CheckBox;
_listviewItem = item;
}
#endregion Constructors
//------------------------------------------------------
//
// Patterns Implementation
//
//------------------------------------------------------
#region ProxySimple Interface
// Returns a pattern interface if supported.
internal override object GetPatternProvider (AutomationPattern iid)
{
if (iid == TogglePattern.Pattern)
{
return this;
}
return null;
}
// Gets the bounding rectangle for this element
internal override Rect BoundingRectangle
{
get
{
// Don't need to normalize, ListViewCheckBoxRect returns absolute coordinates.
return ListViewCheckBoxRect(_hwnd, _listviewItem).ToRect(false);
}
}
// Process all the Element Properties
internal override object GetElementProperty(AutomationProperty idProp)
{
if (idProp == AutomationElement.IsOffscreenProperty)
{
Rect parentRect = GetParent().BoundingRectangle;
NativeMethods.Win32Rect itemRect = ListViewCheckBoxRect(_hwnd, _listviewItem);
if (itemRect.IsEmpty || parentRect.IsEmpty)
{
return true;
}
if (Misc.MapWindowPoints(_hwnd, IntPtr.Zero, ref itemRect, 2) && !Misc.IsItemVisible(ref parentRect, ref itemRect))
{
return true;
}
}
// EventManager.DispatchEvent() genericaly uses GetElementProperty()
// to get properties during a property change event. Proccess ToggleStateProperty
// so the ToggleStateProperty Change Event can get the correct state.
else if (idProp == TogglePattern.ToggleStateProperty)
{
return ((IToggleProvider)this).ToggleState;
}
return base.GetElementProperty(idProp);
}
//Gets the controls help text
internal override string HelpText
{
get
{
return WindowsListView.GetItemToolTipText(_hwnd);
}
}
//Gets the localized name
internal override string LocalizedName
{
get
{
string name = ListViewItem.GetText(_hwnd, _listviewItem, 0);
return name.Length < Misc.MaxLengthNameProperty ? name : name.Substring(0, Misc.MaxLengthNameProperty);
}
}
#endregion ProxySimple Interface
#region IToggleProvider
void IToggleProvider.Toggle()
{
// check or uncheck the checkbox
Toggle();
}
ToggleState IToggleProvider.ToggleState
{
get
{
return GetToggleState();
}
}
#endregion IToggleProvider
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// retrieve bounding rectangle of the listview checkbox
internal static NativeMethods.Win32Rect ListViewCheckBoxRect (IntPtr hwnd, int item)
{
// Rare special case
if (WindowsListView.FullRowSelect (hwnd) && WindowsListView.IsDetailMode (hwnd))
{
// Get listview window rect
NativeMethods.Win32Rect controlRectangle = NativeMethods.Win32Rect.Empty;
if (!Misc.GetWindowRect(hwnd, ref controlRectangle))
{
return NativeMethods.Win32Rect.Empty;
}
// BOUNDS == SELECTBOUNDS, hence cannot rely on them
// will rely on the ICON or LABEL
// Try icon first since it is the closest to the checkbox
NativeMethods.Win32Rect rc;
if ((WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_ICON, out rc) && rc.left != rc.right) || (WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_LABEL, out rc) && rc.left != rc.right))
{
int right = controlRectangle.left + (rc.left - controlRectangle.left);
return new NativeMethods.Win32Rect (controlRectangle.left, rc.top, right, rc.bottom);
}
}
else
{
// Very common, simple case
NativeMethods.Win32Rect wholeItem;
if (!WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_BOUNDS, out wholeItem))
{
return NativeMethods.Win32Rect.Empty;
}
NativeMethods.Win32Rect selectable;
if (!WindowsListView.GetItemRect(hwnd, item, NativeMethods.LVIR_SELECTBOUNDS, out selectable))
{
return NativeMethods.Win32Rect.Empty;
}
if(Misc.IsControlRTL(hwnd))
{
return new NativeMethods.Win32Rect (selectable.right, wholeItem.top, wholeItem.right, wholeItem.bottom);
}
else
{
return new NativeMethods.Win32Rect (wholeItem.left, wholeItem.top, selectable.left, wholeItem.bottom);
}
}
return NativeMethods.Win32Rect.Empty;
}
#endregion Internal Methods
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
// retrieve current ToggleState
private ToggleState GetToggleState ()
{
ListViewItem.CheckState current = (ListViewItem.CheckState) WindowsListView.GetCheckedState (_hwnd, _listviewItem);
switch (current)
{
case ListViewItem.CheckState.NoCheckbox :
{
throw new InvalidOperationException(SR.OperationCannotBePerformed);
}
case ListViewItem.CheckState.Checked :
{
return ToggleState.On;
}
case ListViewItem.CheckState.Unchecked :
{
return ToggleState.Off;
}
}
// developer defined custom values which cannot be interpret outside of the app's scope
return ToggleState.Indeterminate;
}
private void Toggle()
{
// Make sure that the control is enabled
if (!SafeNativeMethods.IsWindowEnabled(_hwnd))
{
throw new ElementNotEnabledException();
}
Misc.SetFocus(_hwnd);
NativeMethods.Win32Rect rc = ListViewCheckBoxRect(_hwnd, _listviewItem);
NativeMethods.Win32Point pt = new NativeMethods.Win32Point((rc.left + rc.right) / 2, (rc.top + rc.bottom) / 2);
if (Misc.MapWindowPoints(IntPtr.Zero, _hwnd, ref pt, 1))
{
// "click" on the checkbox
Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONDOWN, (IntPtr)NativeMethods.MK_LBUTTON, NativeMethods.Util.MAKELPARAM(pt.x, pt.y));
Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONUP, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(pt.x, pt.y));
}
}
#endregion Private Methods
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
private int _listviewItem;
#endregion Private Fields
}
}
|