// Combo-specific events
static private void RaiseEvents(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
// ------------------------------------------------------/////////////////////////////////////
//
// Depending of the type of Combobox we will get different WinEvents
//
// Simple: No events
//
// DropDown: OBJ_STATECHANGE: for the dropbutton button (idChild == 2)
// NOTE: that OBJECT_STATECHANGE will only be generated when user uses button to show the list
// if user uses the button to hide the list, event will not be generated
//
// DropDownList: OBJ_STATECHANGE (same as above)
// : OBJECT_VALUECHANGE - when using the keyboard to navigate between list children
// - no need to handle it here, ListBox proxy will take care of that
//
// ------------------------------------------------------//////////////////////////////////////
ProxySimple el = null;
if (idProp is AutomationProperty && idProp == ExpandCollapsePattern.ExpandCollapseStateProperty)
{
// expand/collapse events are handled in WindowsListBox with the ComboLBox hwnd.
// so just return here so we don't fire extraneous events
return;
}
switch (idObject)
{
case NativeMethods.OBJID_CLIENT:
{
if (eventId == NativeMethods.EventObjectStateChange && idChild == 2)
{
// event came for combobutton
// We will be getting 2 OBJECT_STATECHANGED event
// one with button state pressed and another normal
// both indicate the same invoke event
// hence second event is a duplicate of the first one and we need to filter it out
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (WindowsComboBox.GetComboInfo(hwnd, ref cbInfo) && Misc.IsBitSet(NativeMethods.STATE_SYSTEM_PRESSED, cbInfo.stateButton))
{
// The event could be for both the button and the combo
WindowsComboBox cb = (WindowsComboBox)Create(hwnd, 0);
cb.DispatchEvents(eventId, idProp, idObject, idChild);
el = cb.CreateComboButton();
el.DispatchEvents(eventId, idProp, idObject, idChild);
return;
}
}
el = (ProxySimple)Create(hwnd, 0);
break;
}
}
if (el != null)
{
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
private static void RaiseEventsOnWindow(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
AutomationProperty automationProperty = idProp as AutomationProperty;
ProxySimple el = null;
if ((eventId == NativeMethods.EventObjectShow || eventId == NativeMethods.EventObjectHide) &&
(automationProperty != null && automationProperty == ExpandCollapsePattern.ExpandCollapseStateProperty))
{
if (Misc.IsBitSet(Misc.GetWindowStyle(hwnd), NativeMethods.LBS_COMBOBOX))
{
// List portion of combo: We'll hit it in the case when user hovers over it
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (WindowsComboBox.GetComboInfo(hwnd, ref cbInfo) && (cbInfo.hwndCombo != IntPtr.Zero))
{
WindowsComboBox cb = (WindowsComboBox)WindowsComboBox.Create(cbInfo.hwndCombo, 0);
if (!cb.IsSimpleCombo())
{
el = cb;
}
}
}
}
if (el != null)
{
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
// Same effect as a click on the drop down button
void IInvokeProvider.Invoke()
{
// Ensure that the window and all its parents are enabled.
Misc.CheckEnabled(_hwnd);
if (!WindowsComboBox.GetDroppedState(_hwnd))
{
WindowsComboBox.Expand(_hwnd);
}
else
{
WindowsComboBox.Collapse(_hwnd);
}
}
internal static IRawElementProviderSimple Create(IntPtr hwnd, int idChild)
{
bool parentedByCombo = false;
ProxyFragment parent = null;
int item = 0;
try
{
int style = Misc.GetWindowStyle(hwnd);
// If can not get windows style the hwnd is bad so do not create a proxy for it.
if (style == 0)
{
return(null);
}
if (Misc.IsBitSet(style, NativeMethods.LBS_COMBOBOX))
{
// List portion of combo box
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (WindowsComboBox.GetComboInfo(hwnd, ref cbInfo) && (cbInfo.hwndCombo != IntPtr.Zero))
{
parent = (ProxyFragment)WindowsComboBox.Create(cbInfo.hwndCombo, 0);
parentedByCombo = true;
item = (int)WindowsComboBox.ComboChildren.List;
}
}
}
catch (ElementNotAvailableException)
{
return(null);
}
WindowsListBox listbox = new WindowsListBox(hwnd, parent, item, parentedByCombo);
if (idChild == 0)
{
return(listbox);
}
else
{
return(listbox.CreateListboxItem(idChild - 1));
}
}
private bool IsInsideOfCombo()
{
IntPtr hwndParent = NativeMethodsSetLastError.GetAncestor(_hwnd, NativeMethods.GA_PARENT);
if (hwndParent == IntPtr.Zero)
{
return(false);
}
// Test for combo
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (WindowsComboBox.GetComboInfo(hwndParent, ref cbInfo) && cbInfo.hwndItem == _hwnd)
{
return(true);
}
return(false);
}