private NativeMethods.IPerPropertyBrowsing GetPerPropertyBrowsing() {
if (iPerPropertyBrowsing == null && !axState[checkedIppb] && instance != null) {
axState[checkedIppb] = true;
if (instance is NativeMethods.IPerPropertyBrowsing) {
iPerPropertyBrowsing = (NativeMethods.IPerPropertyBrowsing) instance;
}
}
return iPerPropertyBrowsing;
}
/*internal bool StandardValuesQueried {
* get {
* this.standardValuesQueried = value;
* }
* } */
// ensure that we have processed the caStructs into arrays
// of values and strings
//
private void EnsureArrays()
{
if (this.arraysFetched)
{
return;
}
this.arraysFetched = true;
try {
// marshal the items.
object[] nameItems = nameMarshaller.Items;
object[] cookieItems = valueMarshaller.Items;
NativeMethods.IPerPropertyBrowsing ppb = (NativeMethods.IPerPropertyBrowsing)target.TargetObject;
int itemCount = 0;
Debug.Assert(cookieItems != null && nameItems != null, "An item array is null");
if (nameItems.Length > 0)
{
object[] valueItems = new object[cookieItems.Length];
NativeMethods.VARIANT var = new NativeMethods.VARIANT();
int cookie;
Debug.Assert(cookieItems.Length == nameItems.Length, "Got uneven names and cookies");
// for each name item, we ask the object for it's corresponding value.
//
Type targetType = target.PropertyType;
for (int i = nameItems.Length - 1; i >= 0; i--)
{
cookie = (int)cookieItems[i];
if (nameItems[i] == null || !(nameItems[i] is string))
{
Debug.Fail("Bad IPerPropertyBrowsing item [" + i.ToString(CultureInfo.InvariantCulture) + "], name=" + (nameItems == null ? "(unknown)" : nameItems[i].ToString()));
continue;
}
var.vt = (short)NativeMethods.tagVT.VT_EMPTY;
int hr = ppb.GetPredefinedValue(target.DISPID, cookie, var);
if (hr == NativeMethods.S_OK && var.vt != (short)NativeMethods.tagVT.VT_EMPTY)
{
valueItems[i] = var.ToObject();
if (valueItems[i].GetType() != targetType)
{
if (targetType.IsEnum)
{
valueItems[i] = Enum.ToObject(targetType, valueItems[i]);
}
else
{
try {
valueItems[i] = Convert.ChangeType(valueItems[i], targetType, CultureInfo.InvariantCulture);
}
catch {
// oh well...
}
}
}
}
var.Clear();
if (hr == NativeMethods.S_OK)
{
itemCount++;
continue;
}
else if (itemCount > 0)
{
// shorten the arrays to ignore the failed ones. this isn't terribly
// efficient but shouldn't happen very often. It's rare for these to fail.
//
Array.Copy(nameItems, i, nameItems, i + 1, itemCount);
Array.Copy(valueItems, i, valueItems, i + 1, itemCount);
}
}
// pass this data down to the base Com2Enum object...
string[] strings = new string[itemCount];
Array.Copy(nameItems, 0, strings, 0, itemCount);
base.PopulateArrays(strings, valueItems);
}
}
catch (Exception ex) {
base.PopulateArrays(new string[0], new object[0]);
Debug.Fail("Failed to build IPerPropertyBrowsing editor. " + ex.GetType().Name + ", " + ex.Message);
}
}
private void ReleaseAxControl() {
// This line is like a bit of magic...
// sometimes, we crash with it on,
// sometimes, with it off...
// Lately, I have decided to leave it on...
// (oh, yes, and the crashes seemed to disappear...)
//cpr: ComLib.Release(instance);
this.NoComponentChangeEvents++;
ContainerControl f = ContainingControl;
if (f != null) {
f.VisibleChanged -= this.onContainerVisibleChanged;
}
try {
if (instance != null) {
Marshal.FinalReleaseComObject(instance);
instance = null;
iOleInPlaceObject = null;
iOleObject = null;
iOleControl = null;
iOleInPlaceActiveObject = null;
iOleInPlaceActiveObjectExternal = null;
iPerPropertyBrowsing = null;
iCategorizeProperties = null;
iPersistStream = null;
iPersistStreamInit = null;
iPersistStorage = null;
}
axState[checkedIppb] = false;
axState[checkedCP] = false;
axState[disposed] = true;
freezeCount = 0;
axState[sinkAttached] = false;
wndprocAddr = IntPtr.Zero;
SetOcState(OC_PASSIVE);
}
finally {
this.NoComponentChangeEvents--;
}
}
private void OnGetTypeConverterAndTypeEditor(Com2PropertyDescriptor sender, GetTypeConverterAndTypeEditorEvent gveevent)
{
if (sender.TargetObject is NativeMethods.IPerPropertyBrowsing)
{
NativeMethods.IPerPropertyBrowsing ppb = (NativeMethods.IPerPropertyBrowsing)sender.TargetObject;
bool hasStrings = false;
// check for enums
NativeMethods.CA_STRUCT caStrings = new NativeMethods.CA_STRUCT();
NativeMethods.CA_STRUCT caCookies = new NativeMethods.CA_STRUCT();
int hr = NativeMethods.S_OK;
try {
hr = ppb.GetPredefinedStrings(sender.DISPID, caStrings, caCookies);
}
catch (ExternalException ex) {
hr = ex.ErrorCode;
Debug.Fail("An exception occurred inside IPerPropertyBrowsing::GetPredefinedStrings(dispid=" + sender.DISPID + "), object type=" + new ComNativeDescriptor().GetClassName(ppb) + ". This is caused by an exception (usually an AV) inside the object being browsed, and is not a problem in the properties window.");
}
// Terminate the existing editor if we created the current one
// so if the items have disappeared, we don't hold onto the old
// items.
if (gveevent.TypeConverter is Com2IPerPropertyEnumConverter)
{
gveevent.TypeConverter = null;
}
if (hr != NativeMethods.S_OK)
{
hasStrings = false;
}
else
{
hasStrings = true;
}
if (hasStrings)
{
OleStrCAMarshaler stringMarshaler = new OleStrCAMarshaler(caStrings);
Int32CAMarshaler intMarshaler = new Int32CAMarshaler(caCookies);
if (stringMarshaler.Count > 0 && intMarshaler.Count > 0)
{
gveevent.TypeConverter = new Com2IPerPropertyEnumConverter(new Com2IPerPropertyBrowsingEnum(sender, this, stringMarshaler, intMarshaler, true));
}
else
{
//hasStrings = false;
}
}
// if we didn't get any strings, try the proppage edtior
//
if (!hasStrings)
{
// this is a _bit_ of a backwards-compat work around...
// many older ActiveX controls will show a property page
// for all properties since the old grid would only put up the
// [...] button for "(Custom)". If we have a conversion editor,
// don't allow this to override it...
//
if (sender.ConvertingNativeType)
{
return;
}
Guid g = GetPropertyPageGuid(ppb, sender.DISPID);
if (!Guid.Empty.Equals(g))
{
gveevent.TypeEditor = new Com2PropertyPageUITypeEditor(sender, g, (UITypeEditor)gveevent.TypeEditor);
}
}
}
}