this is my snippet
bool hello::onWindowAttached(FB::AttachedEvent *evt, FB::PluginWindow *win)
{
m_window = win;
if (m_api)
m_api->m_win = m_window;
if (m_api->m_win)
{
FB::PluginWindowWin* wnd = reinterpret_cast<FB::PluginWindowWin*>(m_api->m_win);
HWND hwnd = wnd->getHWND();
MessageBox(hwnd,L"000",L"000",MB_OK);
}
return false;
}
my problem is the onWindowAttached not be fired ever, so i can not get window handler to draw the region in html page.
i resolve it by create new firebreath project, i guess when i created the previous project i selected to no UI parameter to cause this problem.
Related
I have an image button and I want to be disabled when the program starts and upon certain condition, it needs to be enabled.
Here is my code,
public Screen( ) { //constructor
ImageButton hints;
ImageButton.ImageButtonStyle hintsstyle = new ImageButton.ImageButtonStyle();
hintsstyle.up = skin.getDrawable("newrightbut");
hintsstyle.down = skin.getDrawable("newrightbut");
hintsstyle.pressedOffsetX = 1;
hints = new ImageButton(hintsstyle);
hints.setPosition(650, 35);
hints.setHeight(70);
hints.setWidth(70);
stage.addActor(hints);
hints.setTouchable(Touchable.disabled);
}
public void update() {
hints.setTouchable(Touchable.enabled);
}
But, the button is not getting disabled when the program starts and I even tested with button.setDisabled(true) method. It also doesn't work. Any idea why? Any help would be great!! Thanks
This issue is 5 months old now but I try to answer regardless.
ImageButton hints is declared within your constructor (So its scope is limited to the constructor).
The only way that you don't get a compilation error calling it from a method outside the constructor is if you have also declared it somewhere else within your class.
Conclusion: you must have declared it somewhere else in your application and any default, it is enabled.
In a MvvmCross app, I have a page with the classic chat behavior (WhatsApp like): this page shows the history of messages exchanged between two users with the last message at the bottom of the list.
I've successfully implemented the view in Windows Phone 8.1, but I'm struggling with a problem in Android.
I'll give you a short introduction and description of my problem and next I'll go through technical details.
INTRODUCTION
Actually, my need is to apply different style to messages sent by different users: tipically align left messages sent from other user and align right messages sent by me (I do this through the weight property); I need to apply a different drawable background and set different gravity property also.
I use custom binding because, AFAIK, those properties cannot be binded with classic binding: local:MvxBind="Gravity MyPropery" doesn't work because there is no Gravity property.
So, I have of course two axml files:
the first one contains the Mvx.MvxListView
the second one contains the item template for MvxListView
And I've created three different custombinding (for Background, Gravity and Weight) following these guides:
http://slodge.blogspot.it/2013/06/n28-custom-bindings-n1-days-of-mvvmcross.html
In MvvmCross how do I do custom bind properties
THE PROBLEM
I want that, when a user opens the chat View, the list widget shows automatically the last message. To accomplish this, I scroll programmatically the list to the last message and this seems to be the problem.
If I don't scroll programmatically, when I open the page and scroll manually to the end of the page, all custom bindings are applied successfully: I can see messages aligned right and left, with correct background and weight applied.
If I force the scroll programmatically, when I open the page I see a strange behavior: all the messages are present (classic binding, such as Text property, have been successfully applied), but custom bindings are missing. All the messages have the same background and are all left aligned.
BUT, if I scroll manually up and down, the custom binding are processed and the messages are displayed with right style.
DEBUG ANALYSIS
To debug the behaviour I've put a simple static counter in a custom binding procedure to track every time the function is processed.
public class LinearLayoutWeightTargetBinding : MvxAndroidTargetBinding
{
public static int debugCounter = 0;
public LinearLayoutWeightTargetBinding(object target) : base(target)
{
}
protected LinearLayout MyTarget
{
get { return (LinearLayout)Target; }
}
public override Type TargetType { get { return typeof(bool); } }
protected override void SetValueImpl(object target, object value)
{
var ll = (LinearLayout)target;
var itsMe = (bool)value;
var weight = itsMe ? (float)20.0 : (float)5.0;
var layoutParams = new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.WrapContent, weight);
ll.LayoutParameters = layoutParams;
Log.Debug("MeeCHAT", string.Format("LinearLayoutWeightTargetBinding::SetValueImpl::ItsMe:{0} - counter:{1}", itsMe, ++debugCounter));
}
public override MvxBindingMode DefaultMode { get {return MvxBindingMode.TwoWay;} }
}
By this way I saw that actually by scrolling up and down the custom bindings are applied (debugCounter increases correctly).
BUT when I apply the programmatically scroll, only the first 10 items are processed by the custom bindings and this seems the reason why I see the messages without the right style. Because I have a long list, only the first 10 items are processed but they are not visible (they are out of the visible area) and the visibile items have not been processed.
TECHNICAL DETAILS
Here are some details related to technical aspects of my app. I try to give you all important aspects.
ORGANIZATION OF THE VIEWS
By following the approach described by Greg Shackles in this article http://gregshackles.com/presenters-in-mvvmcross-navigating-android-with-fragments/ I have just one general Activity for the app and one Fragment for each View; then through a Presenter is possible to activate the right ViewModel and manage the stack of the navigation.
The Fragment for the View where I have the Mvx.MvxListView widget is
public class MyMatchersChatView : MvxFragment
{
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
var ignore = base.OnCreateView(inflater, container, savedInstanceState);
var result = this.BindingInflate(Resource.Layout.MyMatchersChatView, null);
var headerFrame = result.FindViewById<FrameLayout>(Resource.Id.headerFrameMyMatchersChatView);
var headerWidget = new HeaderWidget() { ViewModel = this.ViewModel };
var tran = ChildFragmentManager.BeginTransaction();
tran.Add(headerFrame.Id, headerWidget, "headerMyMatchersChat");
tran.Commit();
var listView = result.FindViewById<MvxListView>(Resource.Id.messagesList);
listView.SetSelection(listView.Adapter.Count - 1); // Scroll to the end of the list
return result;
}
}
The statement listView.SetSelection(listView.Adapter.Count - 1); force the list to scroll to the end.
Last two things: how the custom bindings are registered and how are applied in axml file.
REGISTRATION OF CUSTOM BINDING
In Setup.cs I have:
protected override void FillTargetFactories(IMvxTargetBindingFactoryRegistry registry)
{
base.FillTargetFactories(registry);
registry.RegisterFactory(new MvxCustomBindingFactory<LinearLayout>("CustomWeight",
(b) => new LinearLayoutWeightTargetBinding(b)));
}
APPLYING OF CUSTOM BINDING
In my axml I have:
<LinearLayout
android:orientation="horizontal"
android:layout_width="0dp"
android:layout_height="wrap_content"
local:MvxBind="CustomWeight IsCurrentUser">
LISTVIEW AND VIEWMODEL
Here is the code of ListView
<Mvx.MvxListView
android:id="#+id/messagesList"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
local:MvxBind="ItemsSource MyMessages"
local:MvxItemTemplate="#layout/mymatcherschatview_itemtemplate" />
and the property in ViewModel
private IEnumerable<MyMatchMessageModel> _myMessages;
public IEnumerable<MyMatchMessageModel> MyMessages
{
get { return _myMessages; }
set
{
_myMessages = value;
RaisePropertyChanged(() => MyMessages);
}
}
ENVIRONMENT
Finally, here is my environment:
Visual Studio 2015
MvvmCross 3.5.1
Core targets: .NET Framework 4.5, Windows 8, ASP.NET Core 5.0, Windows Phone 8.1, Xamarin.Android, Xamarin.iOS, Xamarin.iOS (Classic)
The Android app target is API Level 19 (Xamarin.Android v4.4 Support)
Xamarin 3.11.1450.0
Xamarin.Android 5.1.6.7
Someone can help me to understand if I'm doing something wrong?
Thanks for reading and for any help!
>>EDIT 1<<
I've changed my layout by adding stackFromBottom and transcriptMode properties and by removing the scrolling to below programmatically in Fragment obtaining an auto-scroll behavior, but the problem still remains: to see messages with correct style I have to manually scroll up and down (to activate the custom bindings)
Here is the new axml...
<Mvx.MvxListView
android:id="#+id/messagesList"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stackFromBottom="true"
android:transcriptMode="alwaysScroll"
local:MvxBind="ItemsSource MyMessages"
local:MvxItemTemplate="#layout/mymatcherschatview_itemtemplate" />
...and the new code in Fragment
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
var ignore = base.OnCreateView(inflater, container, savedInstanceState);
var result = this.BindingInflate(Resource.Layout.MyMatchersChatView, null);
var headerFrame = result.FindViewById<FrameLayout>(Resource.Id.headerFrameMyMatchersChatView);
var headerWidget = new HeaderWidget() { ViewModel = this.ViewModel };
var tran = ChildFragmentManager.BeginTransaction();
tran.Add(headerFrame.Id, headerWidget, "headerMyMatchersChat");
tran.Commit();
return result;
}
First thing I would do is to make sure that your custom binding is always getting called.
Set a breakpoint on the SetValueImpl() method and check it´s getting called on those problematic items. If that happens, then the issue relies on the view no getting updated for any reason and you should work on that. If it doesn´t break, you will know for sure it´s a custom binding problem (possibly a bug) in MvxAdapter.
If you find out it´s the second one. I would suggest getting rid of your custom binding and creating your own ChatListAdapter : MvxAdapter as follows:
public class CoolChatListAdapter : MvxAdapter
{
public CoolChatListAdapter(Context context, IMvxAndroidBindingContext bindingContext) : base(context, bindingContext)
{
}
protected override View GetBindableView(View convertView, object source, int templateId)
{
var item = source as MyMatchMessageModel;
var weight = item.IsCurrentUser ? (float) 20.0 : (float) 5.0;
var ll = (LinearLayout) convertView;
var layoutParams = new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.WrapContent, weight);
ll.LayoutParameters = layoutParams;
return base.GetBindableView(convertView, source, templateId);
}
}
Then, in your android view:
var adapter = new ChatListAdapter(this, (IMvxAndroidBindingContext)BindingContext);
_chatList = FindViewById<MvxListView>(Resource.Id.chat_list_view);
_chatList.Adapter = adapter;
I've tried searching stackoverflow to find an answer to this question but so far haven't found anything.
I have a swf file with several movie clips on the stage. When I've managed to create an event where the movie clips swap out to a new movie clip when the user hovers. The problem that I am having is when you click that new movie clip it's supposed to open a URL in a browser window. That happens when I test the movie within Flash CC but when I test it in a browser nothing happens.
Any help for this would be greatly appreciated. I apologize if this question has been asked elsewhere on the site but, as I said, I did a search earlier and didn't find anything.
import flash.events.MouseEvent;
addEventListener(MouseEvent.MOUSE_OUT, gobackAnimation);
function gobackAnimation(event:MouseEvent):void
{
MovieClip(parent).gotoAndStop(1)
}
addEventListener(MouseEvent.CLICK, openURL);
function openURL(event:MouseEvent):void
{
ExternalInterface.call("open", "URL I'm trying to open");
MovieClip(parent).gotoAndStop(1)
}
To open a URL you have to use the navigateToURL function as documented here.
It appears that you are using the following code to trigger a URL to open:
function openURL(event:MouseEvent):void
{
ExternalInterface.call("open", "URL I'm trying to open");
MovieClip(parent).gotoAndStop(1)
}
However, I don't know where or what this ExternalInterface is and how the call function is built.
If you want to open a URL though, you should be doing something along the following lines:
function openURL(event:MouseEvent):void
{
var myURL:String = "http://your.url.goes/here"; // set your url here
var window:String = "_blank"; // you can set this to be whatever you need based on how you want the window opened
var request:URLRequest = new URLRequest(myURL);
request.data = variables;
try {
navigateToURL(request,window);
}
catch (e:Error) {
// handle error here
}
MovieClip(parent).gotoAndStop(1)
}
I have FlipView (it's virtualized with Mode="Standard") with ScrollViewer, Image (inside ScrollViewer as DataTemplate). I set ImageOpened event handler on Image with such code:
private void Image_ImageOpened(object sender, RoutedEventArgs e)
{
var image = sender as Image;
double width = image.ActualWidth;
double height = image.ActualHeight;
var sv = image.Parent as ScrollViewer;
if (sv != null && width != 0 && height != 0)
{
var properZoom = ZoomUtilities.CalculateZoomFactor(width, height);
sv.MinZoomFactor = 0.3f;
sv.ChangeView(null, null, properZoom);
sv.MinZoomFactor = properZoom;
}
}
properZoom is always correct value. One out of the thousand times when I change item (swipe) or load page with this FlipView application crash with breakpoint on sv.ChangeView(..) and AccessViolationException exception is thrown. Does anyone know what could be the reason of such behaviour? Are there any restriction when I can call ChangeView method?
EDIT:
Forgot to mention - there is also DoubleTapped event handler on ScrollViewer which also calls ChangeView
I had the same AccessViolationException using .ChangeView(..). I noticed the exception was thrown when the ScrollViewer I wanted to manipulate had focus. For example when a user was dragging through the list or controlling the scrollbar with his mouse.
Disabling animations solved my problems. If you want to keep the animations you should look for a way to remove focus on the controls before changing the view. I guess the animated ChangeView tries to change a property that is locked because of the user input.
Hope this helps.
I had the same problem.
Solution to me: call inverse, from image object to parent got error.
Call normal path: objectscroolviewer.changeview, works no error.
Then:
var sv = image.Parent as ScrollViewer;
change to
var sv = ScrollViewerObject;
Get object to variable externally, not by internal reference of parent, and ignores sender parameter.
I've got a subclassed UserControl that is the content for my main window. I added a DepedencyProperty to my usercontrol, of type ResizeMode, and the PropertyChanged callback sets the ResizeMode of the main window to the value correctly. It runs fine. I can set it from the code behind, or from the XAML, and it works correctly.
However, when I set it from XAML, the designer throws an Object reference not set to an instance of an object exception, on the code in the PropertyChanged callback that sets the window's resize.
<classes:MyUserControl ResizeMode="NoResize">
<...>
</classes:MyUserControl>
This is the callback. MainWindow is a reference to the parent window.
private static void OnResizeModeChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
(o as MyUserControl).MainWindow.ResizeMode = (ResizeMode) e.NewValue;
}
public ResizeMode ResizeMode
{
get { return (ResizeMode) GetValue(ResizeModeProperty); }
set { SetValue(ResizeModeProperty, value); }
}
public static readonly DependencyProperty ResizeModeProperty =
DependencyProperty.Register("SizeToFit", typeof(ResizeMode), typeof(MyUserControl),
new UIPropertyMetadata(ResizeMode.CanResize, new PropertyChangedCallback(OnResizeModeChanged)));
I could ignore it, or set it in the code behind, but I don't really understand the reason for this error, and I would prefer to set it in XAML.
Can anyone shed some light?
Do you know exactly where the NullReferenceExceptoin is being thrown? For example, if you try this instead:
var uc = o as MyUserControl;
var mw = uc.MainWindow;
mw.ResizeMode = (ResizeMode)e.NewValue;
... then is the exception raised on the second line or the third?
My feeling is that MainWindow has not been assigned by the time ResizeMode is first given a value, so accessing MainWindow.ResizeMode is causing the error.
If that's the case, it's safe to ignore:
var mw = (o as MyUserControl).MainWindow;
if (mw == null) return;
But you might want to cache the value somewhere, and then assign it to MainWindow.ResizeMode when MainWindow gets assigned later.
OK, I think I found the culprit.
The MainWindow is set by App.Current.MainWindow.
Now from what I've read, the Current.MainWindow doesn't exist in Design time, and then when the OnResizeModeChanged methods fire during designtime, MainWindow.ResizeMode, boom! Exception!
I added this line to my methods:
if ((bool) (DesignerProperties.IsInDesignModeProperty.GetMetadata(typeof(DependencyObject)).DefaultValue)) return;
I encountered another problem where my XAML suddenly couldn't load my usercontrol, due to me setting some properties on MainWindow in the constructor, added this:
if (DesignerProperties.GetIsInDesignMode(this))
return;