A return to the QML container onCreationComplete event Q_String

Hello

I'm trying to regain a QString funcition onCreationComplete a container.

Here is the code I use.  When I debug the QML debugger jumps on the

event and moves on to the next control.  I'm guessing that there is an error of some sort, but I don't know what it is.

Thanks in advance.

file .qml

onCreationCompleted: {}
If (ListItemData.channelName is {MSNApp.getSelectedChannel ()})
Background = Color.create("#74D2F7")
}
}

all files

public:

QString Q_INVOKABLE getSelectedChannel();

private:

QString selectedChannel;

.cpp file

selectedChannel = 'Home';  Download initialized in the constructor

QString ApplicationUI::getSelectedChannel() {}

Return selectedChannel;
}

Aparently there is a bug when it comes to properties of context and ListView.  I found this work around.

Thanks for the suggestions.

http://supportforums.BlackBerry.com/T5/Cascades-development/cannot-access-context-property-from-INSI...

Best regards

John

Tags: BlackBerry Developers

Similar Questions

  • I just publish my Muse on Adobe site, and now when I do a search and get a return on research, it contains the name of the site several times. It is in the properties of the page?

    I just published my Muse on Adobe site, and now when I do a search and get a return on research, it contains the name of the site several times. is it in the properties of the page?

    You mean search Google search? or you use any search module in your site and the keywords shows same subject several times on the page?

    Please elaborate more, indicate the url of site.

    Concerning the use of keywords, description, etc, you can add on your page using the page properties > metadata section.

    http://Muse.Adobe.com/strategies-for-SEO.html

    Thank you

    Sanjit

  • Can not access the context property of the Interior of the ListView checkbox - onCheckedChange event

    I have a context property called "app" that connects to my C++ application. My listview has a box with onCheckedChange event listener. In this method, when I make a call to the C++ side. application app.runAction, the system displays not found error app.

    If I move the box outside the list view, it will correctly trigger app.runAction.

    Can you please take a look? Thank you!

    On the side of C++ on how I set the context property.

    QmlDocument * qml = QmlDocument::create("asset:///main.qml").parent(this);

    If (qml-> {hasErrors())}
    Returns false;
    }

    QML-> setContextProperty ("app", this);

    navigationPane = qml-> createRootObject();
    If (! navigationPane) {}
    Returns false;
    }

    QML side

     

    NavigationPane {}
    ID: nav

    {Page}
    ID: mainPage
    {Of container

    {To ListView

    listItemComponents:]
    {ListItemComponent}
    type: 'point '.
    {Of container

    Checkbox {}
    Determine whether the check box should be checked
    According to a value in the data model
    checked: ListItemData.checked
    onCheckedChanged: {}
    app.testAction ();
    }
    }

    This is a scope issue... I really hope the devs find a way to fix it properly apart from this ugly solution:

    You can solve this problem by setting your app variable in the global object Qt

    NavigationPane {
        id: nav
    
    onCreationCompleted: Qt.app = app
    
    Page {
            id: mainPage
            Container {
    ListView {
    listItemComponents: [
            ListItemComponent {
                            type: "item"
                            Container {
                       CheckBox {
                                    // Determine whether the CheckBox should be checked
                                    // according to a value in the data model
                                    checked: ListItemData.checked
                                    onCheckedChanged: {
                                         app.testAction();
                                         Qt.app.testAction();
                                    }
                                }
    

    all code in a ListItemComponent will suffer from this 'framing' question

  • Return to the main VI with a HOME MENU button example

    Hello

    I am in the process of realization of a GUI. Under my in-VI, I want to put a HOME button to return to the main menu if user wishes.

    I went on while loops, saying as long as the button is not true, I continue. Then I tested with an event structure but it does nothing no folds.

    Do you have the explanations, information or examples?

    Thanks in advance,

    Hello

    Thank you for posting on the forum OR.

    Here is an example that could you help accessory.

    You will find attached 3 screws

    United Nations as the home page and so the vi open and a launch

    The other two are under 2 VI containing the 'Home' button pour main to return to the menu.

    All use the structure event.

    Kind regards

  • Invoke the bean of calendar (from Oracle) on the TIMING of the CLICK of MOUSE events in a text box

    Hello
    I want to get the date the user has selected in a calendar of bean (supplied by Oracle), currently my practice is to put a bean for each calendar and after date selection I am pushing this field required date, suppose I need calendar half dozen in my form I have to place the beans a half dozen, basically I don't want user of bean rather , I want him to click on the text box then CLICK event, it will display a calendar of the bean click and on the selection value will return to the text element.
    Please guide is it possible if yes how.

    Version of Oracle Forms. 10.1.2(webutil installé)
    Database. Oracle 10g Enterprise


    Thank you and best regards,
    Syed Khawar

    now when the user clicks on bean, it appears calendar through trigger WCIE

    It's a way to view the calendar of Java, however, you can simply place a button on your canvas for each calendar you wish to view and then in the trigger Button-When-Pressed (WBP) to run code similar to the following:

    /* Code example assumes you have a CONTROL block with a */
    /* block Item called: CALENDAR_ITEM, which will act as a variable */
    /* to record which date item the Java Calendar was called for. */
    BEGIN
       :CONTROL.CALENDAR_ITEM := 'MY_BLOCK.DATE1';
       Set_Custom_Property('CALENDAR.BEAN_AREA',1,'SHOW_CALENDAR','50,50);
    END;
    

    This code displays the calendar and assign the value "DATE1" to your 'Variable' control block, so that you know what Date is your calendar was called for. Then, in your trigger when-Custom-point-Event (WCIE), you manage the date returned by your calendar of Java Bean and assign the value to the element of date in your CONTROL. Field of Calendar_Item.

    DECLARE
      v_event_name      VARCHAR2(30) := :SYSTEM.Custom_Item_Event;
      v_event_vals      ParamLIst;
      n_event_val_type  NUMBER;
      jb_date           VARCHAR2(256);  -- Complete Date as returned by the JavaBean
      d_formated_date   DATE;
      jb_day            VARCHAR2(256);  -- Day Number (1-31)
      jb_month          VARCHAR2(256);  -- Month Number (1-12)
      jb_year           VARCHAR2(256);  -- Year Number (YYYY)
    BEGIN
      IF ( v_event_name = 'CALENDAR_EVENT' AND :CONTROL.Calendar_Item IS NOT NULL ) THEN
        v_event_vals := Get_Parameter_list(:SYSTEM.Custom_Item_Event_Parameters);
        Get_Parameter_Attr(v_event_vals, 'CALENDAR_EVENT_DATE', n_event_val_type, jb_date);
        Get_Parameter_Attr(v_event_vals, 'CALENDAR_EVENT_DAY', n_event_val_type, jb_day);
        Get_Parameter_Attr(v_event_vals, 'CALENDAR_EVENT_MONTH', n_event_val_type, jb_month);
        Get_Parameter_Attr(v_event_vals, 'CALENDAR_EVENT_YEAR', n_event_val_type, jb_year);
    
        /* The variable JB_DATE contains the full date formated as MONTH DD, YYYY */
        /* Our date format is different, so I get the elements of the date in the */
        /* jb_day, jb_month, jb_year variables so I can format them the way I need them. */
        d_formated_date := TO_DATE(jb_month||'/'||mb_day||'/'||jb_year,'mm/dd/rrrr');
        COPY(d_formated_date, :CONTROL.Calendar_item);
      END IF;
    END;
    

    This code example will allow you to use a single area of bean to support several calendar items on a canvas. If you have more than one canvas and you have an element of date on each canvas, you would need a surface of bean / canvas.

    Hope this helps,
    Craig B-)

    If someone useful or appropriate, please mark accordingly.

  • The use of contextual events to rynefall a model piloted by LOV

    ADF 11gpatchSet1

    Hello
    I have the following Setup.

    A homepage containing a region.
    In the area there is a table.
    The contents of the table can be changed in a popUp.
    One of the fields in the pop-up window is a selectOneChoice based on a template
    Driven LOV.
    The research used for the LOV table can be changed via a stubborn workflow
    called from the homepage via a command menu item.

    What I have to do is to update the query used for the LOV after the stubborn workflow has been
    called.

    I looked at contextual events, but I don't know how to close the loop.
    I created an event on the main page to which the region application module is a Subscriber.
    I've added a command button to produce the event and when the button is clicked the
    application of the region (the Subscriber) module receives the event.
    I must now do the same once the stubborn workflow closes, but I'm not
    sure how.

    Any body any ideas?

    Concerning
    Paul

    Hello

    the stubborn workflow, called in a region, or using an actiity of taskflow appeal? In the first case, a navigation region receiver could be used which detects the closure of the workflow by its viewId null. If you use a workflow activity call, then you might have a method activity that you call upon the return of the workflow. I don't know that you need a contextual event for that.

    Frank

  • Enter the file - new private window, FF opens the new window and then immediately returns to the window this request was made of

    Press file - new private window, FF new window (non-private) for about 5 seconds, then returns immediately to the window that asked the new private window. This occurs on three different machines at my place, all with Win 7.

    This can be caused by a plugin like Flash that uses the plugin-container in one of the tabs in this window to another.

  • Photos app contains iPhoto events, do not understand.

    Since the upgrade of the Mavericks to Yosemite (and now ElCapitan) my photo library contains my old iPhoto events. Here are my questions:

    (1) my iMac shows that I have 27 000 photos, but all my other devices I have 11 000 pictures.

    (2) ' iPhoto events' contains 393 events, but many of them are grayed out? These photos to go and how can - I recover?

    (3) I still have the iPhoto application. Can I trash the app or will remove that somehow all my iPhotos currently on the Photos app? Is it possible to merge the iPhoto events in the rest of the Photos app so that I don't have to deal with the old iPhoto?

    1 & 2.  A great basic list may take several days, or even weeks, to migrate and syncs to iCloud, then to your devices. The 'missing' and grated the elements, might simply need more time.

    3. Yes, finally you can remove the iPhoto app and the iPhoto library, but leave the long until you're absolutely, positively sure that the migration to the Photos is successful. There are no big rush, that you won't get a lot of accumulation by removing.

  • In the Subvi VI main event

    Trying to raise events from a main vi.

    I created an example vi as a basic unit of a much larger program.

    The high level vi called a Subvi that contains a structure of the event.  The Subvi works permanently and will close when the program is stopped by the user.

    The upper level has controls that are passed to a global and overall can be read in the Subvi, which should trigger an event.  (it is not)

    The Subvi should be able to run as a Subvi or higher.

    For context:

    The project, of which this comes is a test system.  The Subvi prepresents the control panel main for the test system.  We want to automate the test system and so to use as a Subvi main control panel so we can automate a number of individual test.  (Frequency response, gain of linearity, etc..)

    See below for additional attachment that contains the file project and global variable (can attach only 3 files at a time)

    The overall is just a stop button and a cluster that contains 3 Boolean values.

    It does not work, I was hoping someone could explain to me how to do this without making many changes to the existing Subvi.  If necessary, a case statement could be added which is active when the program works as a Subvi, which would contain the code to raise events to the occurrence can cope.

    I'm looking at the code, now, I'll update the congratulations if it works

  • Can I have several structures with the same case of event event?

    Hello

    I do an application which reproduces the front of the power supply HP6675A. To do this, I did a machine to States with different States

    (initialize, measures, voltage, current, ocp, ov, store, recall, etc.). In each State, should have a structure of the event that attracts the events of the buttons, as for example: If the current state is the voltage mode and the current button is pressed the next State will be the current mode. For this purpose in each State of the state machine should be the same structure of event with the same events.

    My problem is that the Vi does not work properly when I have several structures with the same case of event event. There are some possibly to do and how? Or is impossible to have several events? I read a few posts, but I can't find solutions.

    Any help is appreciated.

    Thank you very much.

    In general, you should have 1 structure of the event in your VI.  In your state machine, the structure of the event should be in "pending" status  So you will probably start in the State of the initialization and then spend idling.  Then, the user presses the present button.  If your state machine should then, go to the current state and then return to Idle.

  • Use the same graphical display of data from the different cases of event Structure

    Hello

    I would like one graph to view the input data and modified by one of the two cases of different event structure.  So if the event 1 is selected by the user, the data would be entered by the code contained in 1 case and then introduced in a waveform to display chart.  If the event case 2 is selected, similar data would enter the 2 cases but then displayed by the same graphic waveform , as in case 1.  I don't know if there is a way to do this... it seems that each case of the event would need its own array of waveform, but it becomes quickly heavy regarding the graphical interface for the multiple cases of event.

    Advice would be greatly appreciated!

    Thank you

    Mike

    You are allowed to put the business structures in the case of timeout.

  • Buttons does not return to the early state in the state machine.

    Hello

    I downloaded a program that is used to back up data. I used a machine to States with different States. State 1 is initialization, where it moves automatically select the State, which allows to select one of the remaining States to copy the data. The selection is made by command buttons. Once u pressed a button, it goes to that respective State and in this state when you press the backup, the backup of data occurs. Once the backup is located the program goes back to the selection state. So far, it works fine. The problem then. Once he returned to the selection state after that copy was made, then none of the buttons are working properly. Then when it goes back to select State and I tried to select a State, nothing happens, not even the stop button works. I don't know why this is happen. Please help me solve this problem. Thanking you in advance.

    You have many States where you have the event structures ("All data" "given more older that '" young data that ' 'Defined Data') (worse there are two of them in "Data set")

    Each of these event structures are for a "Backup" mouse event down.  A singularity is now why you use a mouse event down on a button.  This really should be a value change event.  But this is not the big problem.

    The big problem is that all of these structures events are set to lock the front until the end of the case of the event.  Well, when you click the mouse down on this button, all 4 of these structures tail event this event.  If you are luckly, one of the event will execute and process the event.  Others, that you will never run because the state machine will not get through these cases.)

    You have multiple structures of event you VI and certainly not buried in the event.

    Reading guard and recommendations when using events in LabVIEW

    Then fix your VI architecture.  You must limit the structures of the event or a separate parallel loop, or to a single case of your state machine that your code will frequently return to, without any other user interaction, in order to service the structure of the event.

  • A blue screen (Stop error) has been reported. The message contains the error details.

    Hello Hello.
    can someone help me why this error is coming.
    I use a laptop lenovo.
    Error details:
    product-windows stytem, operating
    ID-1003,
    source-system error,
    version - 5.2.
    sysmbolicname-ER_KRNLCRASH_LOG,
    error code %1, %2 parameter %3, parameter3 %4 parameter 4 %5 2 parameter1

    A blue screen (Stop error) has been reported. The message contains the error details. An event with event ID 1001 might also appear in the event log. This matching event displays information about the specific error that occurred.

    Concerning

    Chandra Murali

    .net developer,

    HYD.

    Hi Murali,

    ·         What is the random question?

    Try the following.

    Method 1: Check for memory questions

    Microsoft Online Crash Analysis - windiag

    Method 2: Updated with the latest chipset and other computer device driver updates. Log in the Web site of the manufacturer to do the same thing.

  • I get the error "on the volume C: default transaction resource manager encountered an error during startup and its metadata has been reset. The data contains the error code. »

    original title: NTFS problem
    Every 5 seconds, I get a warning (event ID 136) that says: "on the volume C: default transaction resource manager encountered an error during startup and its metadata has been reset. The data contains the error code. »

    Immediately followed by an error (event ID 137) that says "on the C: volume default transaction resource manager encountered a one-time error and could not start. The data contains the error code. »

    I am running windows 7 ultimate in any way to solve this problem?

    Hello

    This problem occurs if the Windows file system transaction log is damaged. The Windows file system uses the transaction log to retrieve the system transactions when a file error occurs. The system of common log (CLFS) transaction logs may be left in an inconsistent state. When the CLFS transaction logs are in an inconsistent state.
    To resolve this problem, delete the files .blf and .regtrans-ms in the folder % Windir%\System32\SMI\Store\Machine.
    After you restart the computer, the registry regenerates the deleted files. These regenerated files are in a consistent state.
    1. click on Start , type cmd in the Search box, and then click cmd in the list of programs .

    2. click on run as administratorand then click continue.
    If you are prompted for an administrator password or for confirmation, type the password, or click allow.

    3. at a command prompt, type the following command and press ENTER:
    fsutil resource setautoreset true c:\
    Note
    these steps assume that Windows is installed in the default location, drive C. If this is not the case, adjust the drive letter of the path of the folder to match your configuration.

    4 restart the computer.

    I hope this helps.

  • Determine the owner of the QML object attached to C++

    I have a C++ class that I exposed to QML the usual way, and I'm tying to control QML. The problem is that it cannot be instantiated without setting. This is exactly the same that how LayoutUpdateHandler works, but I just can't understand how this class manages about who controls it is attached to.

    The LayoutUpdateHandler constructor takes a pointer to a control as an argument. There is a constructor without arguments, but the docs say that if you use it, there is no way to define the target control later, do the actually useless LayoutUpdateHandler. Here is a typical use of QML:

    Container {
       attachedObjects: [
          LayoutUpdateHandler {
             onLayoutFrameChanged: {
                // ---Do some stuff
             }
          }
       ]
    }
    

    Don't forget that LayoutUpdateHandler MUST have the target of control set when it is instantiated, it can be done later. Somehow the code above works, and the class instantiated with the parent container as the argument to the constructor object. Now I need to do the same thing with my own class, but I can't understand how to move on the instantiation of the parent control. No matter what I try the argument never happened and only the parameterless constructor is never called.

    Anyone have an idea how it works and how I can get the QML to instantiate my class with the parent control passed as argument?

    You're not the only dev who has tried to do.  I did it too and have been successful. You are on the right track.

    Your class must inherit from BaseObject and override its classBegin() function.  This function will be called after your class has been instantiated, and her mother has been defined.

    For example, I'm doing something like this:

    class MyClass : public BaseObject
    {
    public:
        explicit MyClass();
        explicit MyClass(Control *target)
        virtual ~MyClass();
        virtual void classBegin();
    private:
        void setTargetControl(Control *target);
    };
    
    MyClass::MyClass() : BaseObject(0)
    {
    }
    
    MyClass::MyClass(Control *target) : BaseObject(target)
    {
        setTargetControl(target);
    }
    
    MyClass::~MyClass()
    {
    }
    
    MyClass::classBegin()
    {
        BaseObject::classBegin();
        if(parent()) {
            Control *target = qobject_cast(parent());
            setTargetControl(target);
        }
    }
    
    MyClass::setTargetControl(Control *target)
    {
        // Do your actual initialization here, which requres the target control.
        // In this case, the target control is the control that has this as part of
        // its attached objects block in QML-land
    }
    

Maybe you are looking for

  • iPhone stuck in recovery mode 5 c

    Hi all I'm not native English and my grammar isn't the best, so if you do not understand something I posted, just ask and I try to be more specific. I have the problem that my iPhone 5 c is stuck in recovery mode and I have so far failed. The problem

  • The Firebox and open IE homepage design instead of http html files saved on the HARD drive

    This has not happened before, only in the last 3 days. Don't install anything on PC other than Itunes and possibly - automatic updates on Win 7. The ONLY way to open the saved html file's right-click: open with-> choose default program-> Firefox. It

  • Dock/car driving mode - Possible problem

    So I got the Dock drive from Verizon a few days ago and when I connect it phone randomly takes a song from my library "play music" and starts playing - I then have to get in and out of the app for him to stop Also while driving when the phone detects

  • Need help for upgrade

    Hi my laptop is a HP Pavilion G6 product number: D5F44PA #ACJ currently I have 8 GB of RAM I want to switch to 16 GB but is not portable plug from motherboard. Please advice.

  • Using UC320W with SLM2008, SRW2024 WRVS4400N

    This question has a little broad, but I'm a total newbie to the VLAN in spite of being a consultant FOR 28 years now... The network has never been my goal so far. Using the material in the subject line, peux I spread the voice and data VLAN everywher