In my project, I need to add two UIBarButtonItems to a NavigationItem of a view controller. I solved this with this code:
UIBarButtonItem saveButton = new UIBarButtonItem("Save", UIBarButtonItemStyle.Bordered, (sender, e) => {
//some saving code...
});
UIBarButtonItem delButton = new UIBarButtonItem("Delete", UIBarButtonItemStyle.Done, (sender, e) => {
//some deletion code...
});
UIBarButtonItem[] items = new UIBarButtonItem[]
{
saveButton,
delButton
};
this.NavigationItem.RightBarButtonItems = items;
It worked in previous versions of MonoTouch (on iOS 5, both device and simulator), but (I think so) after I upgraded to MonoTouch 6, only first button from the array is displayed.
I try to use NavigationItem.SetRightBarButtonItems(items, false) method, but without any effect.
Is it a common problem or I am doing something wrong?
Is it a common problem or I am doing something wrong?
Touch.Unit, MonoTouch's unit test runner, use RightBarButtonItems and works correctly (showing both buttons) with MonoTouch 6.0.x.
OTOH I see nothing wrong in your code snippet (but it's a short one). Your best bet is to create a small, self contained, application that shows your issue and attach it to a bug report. We'll be able to review it and see what's wrong (or you might find the issue yourself, if it's inside your own code, when doing the test case).
OK, here is the case. The situation described in my question happens when you already have a back button and a some custom view (i.e. UISegmentedControl instance) in a navigationItem.TitleView. In this case, when you set navigationItem.RightBarButtonItems with an array of UIBarButtonItems and the space is not enough to display a navigationItem.TitleView and both right buttons, iOS renders only the first button of the array and discard the other.
I verified this in a native ObjC application and got the same behavior.
Related
The issue:
We have an application written in C# that uses UIAutomation to get the current text (either selected or the word behind the carret) in other applications (Word, OpenOffice, Notepad, etc.).
All is working great on Windows 10, even up to 21H2, last update check done today.
But we had several clients informing us that the application is closing abruptly on Windows 11.
After some debugging I've seen some System.AccessViolationException thrown when trying to use the TextPatternRange.GetText() method:
System.AccessViolationException: 'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.'
What we've tried so far:
Setting uiaccess=true in manifest and signing the app : as mentionned here https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/350ceab8-436b-4ef1-8512-3fee4b470c0a/problem-with-manifest-and-uiaccess-set-to-true?forum=windowsgeneraldevelopmentissues => no changes (app is in C:\Program Files\
In addition to the above, I did try to set the level to "requireAdministrator" in the manifest, no changes either
As I've seen that it may come from a bug in Windows 11 (https://forum.emclient.com/t/emclient-9-0-1317-0-up-to-9-0-1361-0-password-correction-crashes-the-app/79904), I tried to install the 22H2 Preview release, still no changes.
Reproductible example
In order to be able to isolate the issue (and check it was not something else in our app that was causing the exception) I quickly made the following test (based on : How to get selected text of currently focused window? validated answer)
private void btnRefresh_Click(object sender, RoutedEventArgs e)
{
var p = Process.GetProcessesByName("notepad").FirstOrDefault();
var root = AutomationElement.FromHandle(p.MainWindowHandle);
var documentControl = new
PropertyCondition(AutomationElement.ControlTypeProperty,
ControlType.Document);
var textPatternAvailable = new PropertyCondition(AutomationElement.IsTextPatternAvailableProperty, true);
var findControl = new AndCondition(documentControl, textPatternAvailable);
var targetDocument = root.FindFirst(TreeScope.Descendants, findControl);
var textPattern = targetDocument.GetCurrentPattern(TextPattern.Pattern) as TextPattern;
string text = "";
foreach (var selection in textPattern.GetSelection())
{
text += selection.GetText(255);
Console.WriteLine($"Selection: \"{selection.GetText(255)}\"");
}
lblFocusedProcess.Content = p.ProcessName;
lblSelectedText.Content = text;
}
When pressing a button, this method is called and the results displayed in labels.
The method uses UIAutomation to get the notepad process and extract the selected text.
This works well in Windows 10 with latest update, crashes immediately on Windows 11 with the AccessViolationException.
On Windows 10 it works even without the uiaccess=true setting in the manifest.
Questions/Next steps
Do anyone know/has a clue about what can cause this?
Is Windows 11 way more regarding towards UIAutomation?
On my side I'll probably open an issue by Microsoft.
And one track we might follow is getting an EV and sign the app itself and the installer as it'll also enhance the installation process, removing the big red warnings. But as this is an app distributed for free we had not done it as it was working without it.
I'll also continue testing with the reproductible code and update this question should anything new appear.
I posted the same question on MSDN forums and got this answer:
https://learn.microsoft.com/en-us/answers/questions/915789/uiautomation-throws-accessviolationexception-on-wi.html
Using IUIautomation instead of System.Windows.Automation works on Windows 11.
So I'm marking this as solved but if anyone has another idea or knows what happens you're welcome to comment!
Can someone please tell me whey I am getting a black screen with no video, only sound?
private void screen1btnPlay_Click(object sender, EventArgs e)
{
ScreenOne playScreen1 = new ScreenOne();
playScreen1.PlayScreenOne();
}
... and the other form is like this:
public partial class ScreenOne : Form
{
public ScreenOne()
{
InitializeComponent();
}
public void PlayScreenOne()
{
axVLCPlugin21.playlist.add("file:///" + #"Filepath", null);
axVLCPlugin21.playlist.play();
}
}
Sound works fine, but no video. All the properties of the VLC are left to default, is there something I need to change when using this plugin across multiple forms? Anyone know what's wrong?
Update:: I rebuilt the program in WPF and I am having the same problem. When I have a button on the second form (same form as player) it works fine, as soon as I call it from the main form, sound only. ugh!
I dont know but i can give some solution suggestions,
Make sure the VLC program is installed as 32-bit. I dont know, I've solved a problem that way.
I think high probabilty your problem is based on about "C:\Program Files (x86)\VideoLAN\VLC\plugins" Check your plugins. maybe your audio_filter, audio_mixer, audio_output plugins are missing.
you can remove Vlc, then download and install last VLC 32 bit.
I think that will solve your problem. Dont forget AxAXVLC works with vlc plugins.
I figured out my problem on my own!
When I was creating this instance,
ScreenOne playScreen1 = new ScreenOne();
I was actually creating a redundant instance of what I was trying to do, I'm not sure if that's the right way to put it but I basically already had an instance of the second form and was making another separate instance of the form that was named differently.
I already had in my code to open the second form
Screen2 Screen2 = new Screen2();
private void openScreen2Button_Click(object sender, EventArgs e)
{
Screen2.Show();
}
Then later was doing this which is WRONG, I was adding playscreen1 when I should still have been using Screen2.
Screen2 playScreen1 = new Screen2();
playScreen1.PlayScreenOne();
So when I wanted to use the method to play the media player on the second form from the first one, I just needed to use the same instance of Screen2 that I had created to open the form to begin with instead of created a new instance for what method I wanted to use.
IDK if my explanation makes sense, or maybe its basics to most people (I'm a noob), but if anyone comes across this problem, message me and I'll try to help.
o7
Right now, I am trying to develop a program using Mono and GTK# on a Debian (Raspbian) system.
The issue I'm facing is, that, completely randomly, the GUI (generated by the Stetic designer or its dynamic elements) isn't completely drawn, missing either a few characters from a Label-element or whole widgets, mostly those that were dynamically created. This is how it looks on a dialog window: http://imgur.com/oEZRg7c (text is cut off)
As soon as one window shows this issue, every other window has the same issues, sometimes missing whole widgets, even if those were created afterwards. The solution is usually to quit the program and reopen it, as it only randomly occurs.
This is how the constructor of most of my windows looks like (the part after Build() varies):
public partial class ErrorSolutionDialog : Gtk.Dialog
{
public ErrorSolutionDialog (string errorMessage, string solutionHint)
{
this.WidthRequest = this.Screen.Width;
this.HeightRequest = this.Screen.Height;
this.Maximize ();
this.Fullscreen ();
this.KeepAbove = true;
this.DestroyWithParent = false;
Build ();
this.ErrorMessage.Markup = "<b><span size='xx-large'>" + errorMessage + "</span></b>";
this.SolutionHint.Text = solutionHint;
}
}
I wouldn't say that the use of the Stetic designer inside Xamarin Studio/Monodevelop is bad, but as any piece of software it certainly has some issues.
Also, the use of any designer in any software environment will tie you to that development platform forever. Finally, the created source code will be hardly maintainable, apart from completely foreign for you.
That's why I always recommend to get rid of the designer. You can follow a Gtk# tutorial such as this one, and you'll find it is easy and rewarding. And you'll have whole and thorough control of your code.
The basics about Gtk# is creating a layout with VBoxes and HBoxes. For example, the following code creates a layout in which you'll have a TreeView and a TextView in a Dialog.
var swWin1 = new Gtk.ScrollWindow();
var swWin2 = new Gtk.ScrollWindow();
// TextView
this.txtView = new Gtk.TextView();
swWin1.AddWithViewport( this.txtView );
// TreeView
this.tvView = new Gtk.TreeView();
swWin2.AddWithViewport( this.tvView );
// Layout
var hBox = new HBox( false, 2 );
hBox.PackStart( swWin1, true, true, 5 );
hBox.PackStart( swWin2, true, true, 5 );
this.VBox.PackStart( hBox, true, true, 5 );
PackStart() is the method doing the magic in order to add a widget to a layout. The booleans tell Gtk to expand the widget. A ScrollWindow adds scrollbars to any widget.
Finally, my advice is for any action, use Gtk.Action, and call its methods CreateMenuItem() and CreateToolItem() in order to create menu entries and toobar buttons, instead of repeating the same code again and again.
Hope this helps.
I'am running across this issue when I'm debugging or running my coded UI automation project, where i get the exception labeled "{"COM object that has been separated from its underlying RCW cannot be used." System.Exception {System.Runtime.InteropServices.InvalidComObjectException}" everytime i come from a browser window that contains a pdf reader embedded in it. This happens every time I retrieve the window and try to click back. It barfs when i perform the back method on it. I've tried different things but none has worked including the playback wait.
var hereIsmypdf = ReturnPDFDoc();
public BrowserWindow ReturnPDFDoc()
{
Playback.Wait(1000);
var myPdFdoc = GlobalVariables.Browser;
return myPdFdoc;
}
hereIsmypdf.Back();
The only way i was able to get around this issue was not to use the BrowserWindow class. I ended up using the WinWindow class and just getting the tab of the window from it. The BrowserWindow class seemed to trigger the exception "COM object that has been separated from its underlying RCW cannot be used." System.Exception {System.Runtime.InteropServices.InvalidComObjectException}" everytime i tried to retrieve it. I hope this helps someone one or maybe someone has a better way to handle this issue.
For the people that voted my question down, i really did try to figure it out. Sorry i wasnt clear about what i was asking the community or couldn't properly articulate what this pain was. I'm sure someone probably is going through the same pain i did and having a hard time articulating whats going on.
Here is my code on what i ended up doing
public WinTabPage ReturnPDFDoc()
{
WinWindow Wnd = new WinWindow();
Wnd.SearchProperties[BrowserWindow.PropertyNames.ClassName] = "IEFrame";
WinTabList tabRoWlist = new WinTabList(Wnd);
tabRoWlist.SearchProperties[WinTabPage.PropertyNames.Name] = "Tab Row";
WinTabPage myTab = new WinTabPage(tabRoWlist);
myTab.SearchConfigurations.Add(SearchConfiguration.AlwaysSearch);
myTab.SearchProperties[WinTabPage.PropertyNames.Name] = "something";
//UITestControlCollection windows = newWin.FindMatchingControls();
return myTab;
}
You can't have your cake and eat it too, apparently.
I'm currently using the System.Windows.Forms.WebBrowser in my application. The program currently depends on using the GetElementsByTagName function. I use it to gather up all the elements of a certain type (either "input"s or "textarea"s), so I can sort through them and return the value of a specific one. This is the code for that function (my WebBrowser is named web1):
// returns the value from a element.
public String FetchValue(String strTagType, String strName)
{
HtmlElementCollection elems;
HtmlDocument page = web1.Document.Window.Frames[1].Document;
elems = page.GetElementsByTagName(strTagType);
foreach (HtmlElement elem in elems)
{
if (elem.GetAttribute("name") == strName ||
elem.GetAttribute("ref") == strName)
{
if (elem.GetAttribute("value") != null)
{
return elem.GetAttribute("value");
}
}
}
return null;
}
(points to note: the webpage I need to pull from is in a frame, and depending on circumstances, the element's identifying name will be either in the name or the ref attribute)
All of that works like a dream with the System.Windows.Forms.WebBrowser.
But what it is unable to do, is redirect the opening of a new window to remain in the application. Anything that opens in a new window shoots to the user's default browser, thus losing the session. This functionality can be easily fixed with the NewWindow2 event, which System.Windows.Forms.WebBrowser doesn't have.
Now forgive me for being stunned at its absence. I have but recently ditched VB6 and moved on to C# (yes VB6, apparently I am employed under a rock), and in VB6, the WebBrowser possessed both the GetElementsByTagName function and the NewWindow2 event.
The AxSHDocVw.WebBrowser has a NewWindow2 event. It would be more than happy to help me route my new windows to where I need them. The code to do this in THAT WebBrowser is (frmNewWindow being a simple form containing only another WebBrowser called web2 (Dock set to Fill)):
private void web1_NewWindow2(
object sender,
AxSHDocVw.DWebBrowserEvents2_NewWindow2Event e)
{
frmNewWindow frmNW = new frmNewWindow();
e.ppDisp = frmNW.web2.Application;
frmNW.web2.RegisterAsBrowser = true;
frmNW.Visible = true;
}
I am unable to produce on my own a way to replicate that function with the underwhelming regular NewWindow event.
I am also unable to figure out how to replicate the FetchValue function I detailed above using the AxSHDocVw.WebBrowser. It appears to go about things in a totally different way and all my knowledge of how to do things is useless.
I know I'm a sick, twisted man for this bizarre fantasy of using these two things in a single application. But can you find it in your heart to help this foolish idealist?
I could no longer rely on the workaround, and had to abandon System.Windows.Forms.WebBrowser. I needed NewWindow2.
I eventually figured out how to accomplish what I needed with the AxWebBrowser. My original post was asking for either a solution for NewWindow2 on the System.Windows.Forms.WebBrowser, or an AxWebBrowser replacement for .GetElementsByTagName. The replacement requires about 4x as much code, but gets the job done. I thought it would be prudent to post my solution, for later Googlers with the same quandary. (also in case there's a better way to have done this)
IHTMLDocument2 webpage = (IHTMLDocument2)webbrowser.Document;
IHTMLFramesCollection2 allframes = webpage.frames;
IHTMLWindow2 targetframe = (IHTMLWindow2)allframes.item("name of target frame");
webpage = (IHTMLDocument2)targetframe.document;
IHTMLElementCollection elements = webpage.all.tags("target tagtype");
foreach (IHTMLElement element in elements)
{
if (elem.getAttribute("name") == strTargetElementName)
{
return element.getAttribute("value");
}
}
The webbrowser.Document is cast into an IHTMLDocument2, then the IHTMLDocument2's frames are put into a IHTMLFramesCollection2, then I cast the specific desired frame into an IHTMLWindow2 (you can choose frame by index # or name), then I cast the frame's .Document member into an IHTMLDocument2 (the originally used one, for convenience sake). From there, the IHTMLDocument2's .all.tags() method is functionally identical to the old WebBrowser.Document.GetElementsByTagName() method, except it requires an IHTMLElementCollection versus an HTMLElementCollection. Then, you can foreach the collection, the individual elements needing to be IHTMLElement, and use .getAttribute to retrieve the attributes. Note that the g is lowercase.
The WebBrowser control can handle the NewWindow event so that new popup windows will be opened in the WebBrowser.
private void webBrowser1_NewWindow(object sender, CancelEventArgs e)
{
// navigate current window to the url
webBrowser1.Navigate(webBrowser1.StatusText);
// cancel the new window opening
e.Cancel = true;
}
http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/361b6655-3145-4371-b92c-051c223518f2/
The only solution to this I have seen was a good few years ago now, called csExWb2, now on Google code here.
It gives you an ExWebBrowser control, but with full-on access to all the interfaces and events offered by IE. I used it to get deep and dirty control of elements in a winforms-hosted html editor.
It may be a bit of a leap jumping straight into that, mind.