I'm having a strange issue with AVFoundation in a completion block of loadValuesAsynchronously(forKeys:) on an AVAsset with the key "availableMediaCharacteristicsWithMediaSelectionOptions", I'm inspecting the values of the available media selection options in the group for the .legible characteristic, as well as the currently selected media option in that group (via selectedMediaOption(in: group). When I print these out, I get the following output (the array is the available selection options, followed by the current selection):
(
"<AVMediaSelectionKeyValueOption: 0x60c002078380, language = en-IE, mediaType = 'sbtl', title = English+(Ireland)>",
"<AVMediaSelectionKeyValueOption: 0x60c002078440, language = ab, mediaType = 'sbtl', tagged media characteristics = {public.accessibility.transcribes-spoken-dialog, public.accessibility.describes-music-and-sound}, title = Abkhazian>"
)
<AVMediaSelectionKeyValueOption: 0x60c00207b640, language = en-IE, mediaType = 'sbtl', title = English+(Ireland)>
As you can see, the selected option has the same info as the en-IE option in the array, but it is actually a different AVMediaSelectionOption instance since the address differs. This is occurring immediately following a state change on the AVPlayerItem object, in case that affects anything. Does the selected option get updated later? Has anyone ever seem something like this?
So it looks like the answer is that the identity of the AVMediaSelectionGroup (as well as the AVMediaSelectionOptions that it contains) changes with every call to .mediaSelectionGroup(forMediaCharacteristic:). This means that even though the group will contain all the same information, it will not be the same instance as the one from the previous call.
Related
I have a form called 'detail' which shows a detailed view of a selected record. The record is selected from a different form called 'search'. Because I want to be able to open multiple instances of 'detail', each showing details of a different record, I used the following code:
Public detailCollection As New Collection
Function openDetail(patID As Integer, pName As String)
'Purpose: Open an independent instance of form
Dim frm As Form
Debug.Print "ID: " & patID
'Open a new instance, show it, and set a caption.
Set frm = New Form_detail
frm.Visible = True
frm.Caption = pName
detailCollection.Add Item:=frm, Key:=CStr(frm.Hwnd)
Set frm = Nothing
End Function
PatID is the Primary Key of the record I wish to show in this new instance of 'detail.' The debug print line prints out the correct PatID, so i have it available. How do I pass it to this new instance of the form?
I tried to set the OpenArgs of the new form, but I get an error stating that OpenArgs is read only. After researching, OpenArgs can only be set by DoCmd (which won't work, because then I don't get independent instances of the form). I can find no documentation on the allowable parameters when creating a Form object. Apparently, Microsoft doesn't consider a Constructor to be a Method, at least according to the docs. How should I handle this? (plz don't tell me to set it to an invisible text box or something) Thanks guys, you guys are the best on the net at answering these questions for me. I love you all!
Source Code for the multi-instance form taken from: http://allenbrowne.com/ser-35.html
Inside your Form_detail, create a custom property.
Private mItemId As Long
Property Let ItemID(value as Long)
mItemId = value
' some code to re query Me
End Property
Property Get ItemId() As Long
ItemId = mItemId
End Property
Then, in the code that creates the form, you can do this.
Set frm = New Form_detail
frm.ItemId = patId
frm.Visible = True
frm.Caption = pName
This will allow you to pass an ID to the new form instance, and ensure it gets requeried before making it visible. No need to load all of the results every time if you're always opening the form by Newing it. You let the property load the data instead of the traditional Form_Load event.
This works because Access Form modules are nothing more than glorified classes. Hope this helps.
You could try applying a filter:
frm.Filter = "[ID] = " & patID
frm.FilterOn = True
The Record Source of the Detail form will need to be set to the table to which the ID belongs.
UPDATE
As you requested, here is the code to set the RecordSource:
frm.RecordSource = "select * from TableName where [ID] = " & patID
This is probably cleaner than using a filter given that a user can remove the filter (depending on the type of form).
I am creating a MATLAB application which connects to an OPC Server and reads the Tag properties. The MATLAB documentation is telling me that I can add a group, add tag items, and then read the value:
grp = addgroup(da, 'ExRead');
itm = additem(grp, 'Tag.Argument');
The problem is that I don't know the tag argument, in my app the user is selecting an available tag in a popupmenu and the value is written to a string, but when I call:
val = get(handles.popupmenu1, 'Value'); // Ask for Value selected item
string_val = get(handles.popupmenu1, 'String'); // Ask for string
stringName = string_val{val}; // Ask for string corresponding to the specified value
set(handles.text1, 'String', stringName); // Display the selected tag
item1 = additem(Group1, stringName); // Add the selected string to a global group "Group1"
read1 = read(Group1, item1); // Read the value
set(handles.text11, 'String', read1); // Display the value
But when I run the code MATLAB generates errors. I guess the problem is item1 = additem(Group1, stringName); In all the MATLAB documentation examples I see something like item1 = additem(Group1, 'adres.adres.1'); This should explain why I am unable to add any data to the Group1.
But how can I add an item to a taggroup which must be specified/selected by a user?
Group1 appears to be a variable here, that is undefined. Perhaps you meant to type 'Group1', with quotes? That would add item to a group called Group1.
If I get it right, you don't know which tag names you should use.
The correct ItemID (Tag name) is typically found by browsing the server address space.
Before you implement browsing in your application (if possible with MATLAB), you can use test clients, such as Prosys OPC Client to browse the address space and find the proper ItemID(s) to use.
I'm using a plugin and want to perform an action based on the records statuscode value. I've seen online that you can use entity.FormattedValues["statuscode"] to get values from option sets but when try it I get an error saying "The given key was not present in the dictionary".
I know this can happen when the plugin cant find the change for the field you're looking for, but i've already checked that this does exist using entity.Contains("statuscode") and it passes by that fine but still hits this error.
Can anyone help me figure out why its failing?
Thanks
I've not seen the entity.FormattedValues before.
I usually use the entity.Attributes, e.g. entity.Attributes["statuscode"].
MSDN
Edit
Crm wraps many of the values in objects which hold additional information, in this case statuscode uses the OptionSetValue, so to get the value you need to:
((OptionSetValue)entity.Attributes["statuscode"]).Value
This will return a number, as this is the underlying value in Crm.
If you open up the customisation options in Crm, you will usually (some system fields are locked down) be able to see the label and value for each option.
If you need the label, you could either do some hardcoding based on the information in Crm.
Or you could retrieve it from the metadata services as described here.
To avoid your error, you need to check the collection you wish to use (rather than the Attributes collection):
if (entity.FormattedValues.Contains("statuscode")){
var myStatusCode = entity.FormattedValues["statuscode"];
}
However although the SDK fails to confirm this, I suspect that FormattedValues are only ever present for numeric or currency attributes. (Part-speculation on my part though).
entity.FormattedValues work only for string display value.
For example you have an optionset with display names as 1, 2, 3,
The above statement do not recognize these values because those are integers. If You have seen the exact defintion of formatted values in the below link
http://msdn.microsoft.com/en-in/library/microsoft.xrm.sdk.formattedvaluecollection.aspx
you will find this statement is valid for only string display values. If you try to use this statement with Integer values it will throw key not found in dictionary exception.
So try to avoid this statement for retrieving integer display name optionset in your code.
Try this
string Title = (bool)entity.Attributes.Contains("title") ? entity.FormattedValues["title"].ToString() : "";
When you are talking about Option set, you have value and label. What this will give you is the label. '?' will make sure that the null value is never passed.
I am trying to find the max changestamp so I can start using it. I tried the following:
URL url = "https://docs.google.com/feeds/default/private/changes?v=3"
ChangelogFeed foo = service.getFeed(url, ChangelogFeed.class);
LargestChangestamp stamp = foo.getLargestChangestamp();
stamp is always null.
Is this the way to get the largest changestamp, or do I need to set it first in order to use it?
The largest changestamp is also available in the user metadata feed. See the "docs:largestChangestamp" element within the response protocol tab here,
I'm not sure the java api exposes the largestChangestamp property directly yet - last time I checked it was hidden in the xmlBlob property, and I had to do an xml parse to grab it out.
This seems to be a bug in the API. I got the changestamps by getting the ChangelogEntrys from the ChangelogFeed:
List<ChangelogEntry> entries = foo.getEntries();
for (ChangelogEntry entry: entries) {
String blob = entry.getXmlBlob().getBlob();
System.out.println("Blob: " + blob);
}
The changestamp for an entry is contained in its blob.
I'm currently working on a Database which requires the following functionality:
For example given a specific project, I have a series of structures which belong to that project, which are displayed in a datasheet view on the project form. I am attempting to allow the user to on double click to navigate to that specific structure which is displayed on another form. Currently I am using filters to implement this behavior, however, this results in the filter being left on, and when I manually turn off the filter, the form I switch to returns back to the first entry.
I am using the current code on the datasheet:
Private Sub struct_name_DblClick(Cancel As Integer)
LookupValue = Me.struct_ID
Form_frm_control.pg_structure.SetFocus
Form_frm_control.subform_structure.Form.Filter = "struct_ID = " & LookupValue
Form_frm_control.subform_structure.Form.FilterOn = True
End Sub
Any help would be greatly appreciated. Thanks in advance.
It all depends on what you need to do.
If you want to display all records and navigate to the selected record, then you can use bookmark navigation:
With Forms!MyOtherForm
.RecordsetClone.FindFirst "struct_ID = " & Me!struct_ID
If Not .RecordsetClone.NoMatch Then
If .Dirty Then
.Dirty = False
End If
.Bookmark = .RecordsetClone.Bookmark
End If
End With
This assumes that the other form is open with all the records loaded.
Another approach to this problem, which I find more useful for popup situations like this, is to just open the other form as a dialog and require it be closed before returning to the calling context. In that case, you'd do this:
DoCmd.OpenForm "MyOtherForm", , , "struct_ID = " & Me!struct_ID, , acDialog
You'd then have to close the other form to get back to the original context.
You might think that with large numbers of records this would be inefficient, but it's actually very fast, as this operation is highly optimized within Access (moreso than filtering an already open form, in fact).