To access the instance of the ListView onTriggered event ListItemComponent

Similar Questions

• Errors in 'Speed' while accessing the mouse click events?

  Hello

  I built a software where it has a CVI callback function registered on the Panel. The function tests whether two cases, the first EVENT_LEFT_CLICK and then EVENT_LEFT_CLICK_UP. The user is supposed to keep the click button for some time (~ 1 second), and there is no problem. However, I have found that if by mistake (that users commit often) multiple rapid clicks are made, sometimes the click down the piece of event (EVENT_LEFT_CLICK) of the code is not read. I reduced the likelihood of this problem of the speed setting of double click (on Windows) to the maximum.

  I think that if I could eliminate the double click event, this problem would be resolved almost completely and only limited by the speed at which the processor can update mouse events.

  Hope you understand my problem.

  Thank you!!

  AUTOSOLVED.

  Thanks to a guy who posted his own solution on a Windows forum, to 'disable' the double click. Just change the HKEY_CURRENT registry value > ControlPanel > mouse > DoubleClickSpeed to 1. What makes the double click speed so fast that you can access virtually every user actually simple clicks.

  After doing this, in order to apply the registry editing, I ended explorer.exe running and he raised through windows task screen. However, change, this applies to what I opened the mouse Panel (without change or apply anything from there).

• ListView onTriggered event to push a new page

  Currently, I started to learn and develop applications for bb10. I saw troubled when wants to push a new page when click the item in the listview.

  ListView {
              dataModel: XmlDataModel {
                  source: "model.xml"
              }
  
              listItemComponents: [
                  ListItemComponent {
                      type: "listItem"
                      StandardListItem {
                          title: ListItemData.title
                          description: ListItemData.subtitle
                          status: ListItemData.status
                      }
                  }
              ]
              onTriggered: {
                  var new_page = nextpage.createObject();
                  navigationPane.push(new_page);
              }
  
              attachedObjects: [
                  ComponentDefinition {
                      id: nextpage
                      source: "newqml.qml"
                  }
              ]
          }
  

  The code that I use, I expect to get to the newqml.qml, then click on any point on the listview however is not doing. How can I change the code to obtain the result.

  and if I want it open different page each item in listview how does?

  Thanks in advance.

  Hello

  I'm new on this, but I have a tip that could help: create a new project, select stunts, then on the models page, select ListView.

  This will automatically create a default list that automatically connects your article to an ItemPage.qml of a second!

• To access the logs of events outside the Simulator Simulator

  We must be able to access a text copy of the Simulator event outside the Simulator logs.

  The goal is to have a tester to be able to send logs of the Simulator to a developer when they run into a problem with the application.

  Does anyone know how to do this?

  In the Simulator: simulate-> USB cable connected

  On the command line: JavaLoader-u eventlog > simulator.log

• Access to a component (ImageView) inside the ListView

  I have a ListView in which there is an ImageView. When any item is typed, I manage onTriggered Signal. At this signal, I want access the ImageView the ListItem that is typed. How to do this?

  I think that the best workaround is using your own object as a data model to the image property. Then you can change it in onTriggered signal just like that ListItemData.imageSource = newImageSource

  for example:

  // If you are using JSON add a new property which is a imageSource
  
  model.append({"name": "bla bla", "imageSource": "bla bla"})
  

  or write a derivered of QObject class as in this example

  https://developer.BlackBerry.com/native/reference/Cascades/bb__cascades__GroupDataModel.html

  but hope that you use GroupDataModel

  Another solution is to write your own function and use instead onTriggered

  for example (I like examples of the )

  ListView{
  
      function myOwnFunction(indexPath, imageView){
          var item = dataModel.data(indexPath);
          if (item){
              // set new image
          }
      }
  }
  
  // And access it from ListItemComponent
  
  ListItemComponent {
      type: ""
      Container {
          id: root
  
          onTouch{
              root.ListItem.view.myOwnFunction(root.ListItem.indexPath, imageView)
          }
      }
  

• To access the values from the row outside the ListView ListItem

  Hello

  I spent two hours browsing the forums and documentation with no chance of finding a solution on how to access the list item data from outside the listview.

  Let explain me my code. It is marked with I work and what does not work and its expected behavior.

  Should work behavior

  
  Tapping & getting data
  

  The arrayDataModel is filled with 4 rows. Firstly the list item, second item in the list... etc.

  • Tapping on the order of the day, label with the id of triggeredText displays the value of a threaded list item.
  • The index of the tapped icon appears in the label with the id of triggerredIndex.

  Incrementing Index using ActionItems onBar

  By pressing action items 'previous' and 'next', you can increment the index value to the label with the id of triggeredIndex. The order of the index is 0-4, even as total of the items in the list.

  How to extract data from the index when the value of triggeredIndex?

  Buttons

  The buttons at the bottom of the screen... Select 1, select the 2nd, 3rd Select should select indexes 0,1,2 of the list and display the value in triggeredText and triggeredIndex. They do not work.

  How did I pull the values when you click the buttons?

  import bb.cascades 1.3
  
  TabbedPane {
      id: root
      showTabsOnActionBar: false
  
      Tab {
          id: mainTab
          title: "Test List"
              Page {
                  id: mainPage
                  titleBar: TitleBar {
                      title: "List Traversal Test"
                  }
                  actions: [
                      ActionItem {
                          title: "Previous"
                          ActionBar.placement: ActionBarPlacement.OnBar
                          onTriggered: {
                              // get current selected index from list=
                              var currentIndex = parseInt(triggeredIndex.text);
  
                              if(currentIndex <= 0){
                                  //do nothing already at first item
                              }else{
                                  // subtract 1 from index ( ci - 1) ?
                                  var newIndex = parseInt(triggeredIndex.text) - 1;
  
                                  // show data from new selected index
                                  // ???
  
                                  // triggeredItem.text = XXX // the data
                                  // ???
  
                                  // triggeredIndex.text = X // the current index
                                  triggeredIndex.text = newIndex;
                              }
                          }
                      },
                      ActionItem {
                          title: "Next"
                          ActionBar.placement: ActionBarPlacement.OnBar
                          onTriggered: {
                              // get current selected index from list=
                              var currentIndex = parseInt(triggeredIndex.text);
  
                              if(currentIndex == 4){
                                  //do nothing already at lastitem
                              }else{
                              // add 1 to index ( ci + 1) ?
                              var newIndex = parseInt(triggeredIndex.text) + 1
  
                              // show data from new selected index
                              // ???
  
                              // triggeredItem.text = XXX // the data
                              // ???
  
                              // triggeredIndex.text = X // the current index
                              triggeredIndex.text = newIndex;
                          }
                          }
                      },
                      ActionItem {
                          title: "Clear"
                          ActionBar.placement: ActionBarPlacement.OnBar
                          onTriggered: {
                              // set current index to 0 (top item in list)
                          }
                      }
  
                  ]
                  Container {
                      preferredHeight: maxHeight
                      layout: StackLayout {
                          orientation: LayoutOrientation.TopToBottom
                      }
  
                      Label{
                          id: triggeredItem      // value of listitem from current index
                          text: "0"
                      }
                      Label{
                          id: triggeredIndex    // current index
                          text: "0"
                          onTextChanged: {
                              // set triggeredItem.text to contents of selected ListItem with same index
                              // STUCK HERE cannot access ListItem.dataModel(indexPath) from here....
                          }
  
                      }
                      Container{
                          ListView {
  
                              id: theList
                              objectName: "dalist"
                              dataModel: ArrayDataModel {
                                  id: theListModel
                              }
                              listItemComponents: ListItemComponent {
                                  StandardListItem {
                                      id: itemRoot
                                      title: ListItemData
                                  }
  
                              }
                              onTriggered: {
                                  var si = dataModel.data(indexPath);
                                  triggeredItem.text = "LIST ITEM CONTENT: " + si;  //set content when user taps on item
                                  triggeredIndex.text = "LIST ITEM INDEX INDEX: " + indexPath;  // set index when user taps
                              }
  
                              onSelectionChanged: {
                                  //console.log(selected);
                              }
  
                              onCreationCompleted: {
  
                                  //add some data to the listview
                                  theListModel.append("First List Item");
                                  theListModel.append("Second List Item");
                                  theListModel.append("Third List Item");
                                  theListModel.append("Fourth List Item");
                              }
                          }
  
                      }
                      Container{
                          layout: StackLayout {
                              orientation: LayoutOrientation.LeftToRight
                          }
                      Button{
                          text: "Select 1st"
                          onClicked: {
                              theList.clearSelection();
                              theList.select(0);
  
                          }
                      }
                      Button{
                          text: "Select 2nd"
                          onClicked: {
                              theList.clearSelection();
                              theList.select(1);
  
                          }
                      }
  
                      Button{
                          text: "Select 3rd item"
                          onClicked: {
  
                              //expected behaviour is to show data from Third List Item
  
                              // triggeredIndex.text = INDEX 3
                              // triggeredText.text = (DATA FROM THIRD LIST ITEM)
  
                              // THIS IS NOT WORKING ....
                              theList.clearSelection();
                              theList.select(2);
                              console.log(theList.dataModel(3));
                              triggeredItem.text = theListModel.dataModel(3);
  
                          }
                      }
                  }
                 }
              }
          }//tab
  }
  

  Thank you and have a happy and healthy 2015!

  Your help will be greatly appreciated.

  I ran and got this:

  asset:///main.qml:161: TypeError: Result of expression 'theList.dataModel' [bb::cascades::ArrayDataModel(0x1091a838)] is not a function.
  

  But it works

  theListModel.data([3])
  

  But this isn't the solution, you have a more serious problem. You select a value, you trigger. If you add this in onTriggered you select it (and you can see that it changes color when it is selected).

  theList.select(indexPath);
  

  If you want to use option to deselect

  theList.select(indexPath, !theList.isSelected(indexPath));
  

  And if you want to have that one chose this

  theList.clearSelection();
  theList.select(indexPath);
  

  Inside the button 'Select the 3rd point' allows to select programmatically

  theList.select([2]);
  

  It works but I'm not sure what you're trying to do

• Access CPP of the ListView in QML function

  ListView {
              id: listView
              dataModel: dataModel
              listItemComponents: [
                  ListItemComponent {
                      type: "item"
                      StandardListItem {
                          title: ListItemData.title
                          description: app.formatDate(ListItemData.pubDate);
                      }
                  }
           ]
  }
  

  and in the PRC

  QString ApplicationUI::formatDate(QString date) {
      return "bla";
  }
  

  Function call leave outer ListView works well, but I cannot access any function defined outside ListView!

  In this case, I get asset:///blabla.qml:16: ReferenceError: can't find variable: app

  How can I call it?

  For some strange reason the listItemComponents are outside the normal code flow. But you can bypass. Give your listItemComponent a name/id. You can reference it trough the parent ListView. Something like this should work:

  StandardListItem {
   id: mscurli
   title: ListItemData.OriginalTitle;
   description: ListItemData.TheatreAndAuditorium
   status: mscurli.ListItem.view.getShowTime(ListItemData.dttmShowStart);
  }
  

  I used a set inside my ListView simple helper function to get the C++ code:

  function getShowTime(str) {
   return _myapp.formatTime(str);
  }
  

• Not able to access the parent instance variable in outside of the methods in child

  Hello
  
  I don't get why I am not able to access the instance variable parent class apart from the example of the child class methods.
  

  class Parent
  {
       int a;
  }
  
  class Child extends Parent
  {
       a = 1; // Here i am getting a compilation error that Syntax error on token "a", VariableDeclaratorId expected after this token
       
       void someMethod()
       {
            a = 1;  // Here i am not getting any compilation error while accessing parent class variable
       }
  }

  Can someone let me know the exact reason for this, and what about the talks of error?
  
  Thank you
  Uday
  
  Published by: Udaya Shankara Gandhi on June 13, 2012 03:30

  You can only put assignments or expressions inside the methods, of the builders or the initializors class, or when you declare a variable.
  It has nothing to the child which stretches from Parent.

  class Parent {
      int a = 1;
  
      { a = 1; }
  
      public Parent() {
          a = 1;
      }
  
     public void method() {
         a = 1;
     }
  }
  

• Access the mobile nodes in a ListView

  How can I access the nodes of the cell (listcells) in a listview?
  
  For example, if I want to increase the size (specifically, the height) of the cells?

  You must write a CellFactory for your ListView, like this:

          ObservableList items = FXCollections.observableArrayList("String1", "String2", "String3");
  
          ListView listView = new ListView();
          listView.setItems(items);
          listView.setCellFactory(new Callback, ListCell>() {
              @Override
              public ListCell call(ListView stringListView) {
                  ListCell cell = new ListCell() {
                      protected void updateItem(String item, boolean empty) {
                          super.updateItem(item, empty);
                          if (item != null) {
                              setText(item);
                          }
                      }
                  };
                  cell.setPrefHeight(100);
                  return cell;
              }
          });
  

  Usually, you will probably want to write your own class for the cell factory.

  You can assign a height or you can add a style class to your cell and use the fill in CSS.

  (I don't know why you cannot set directly on the cell fill.)

• Access the current instance of request module in a java class in the model

  Hi all
  I'm trying to implement the custom story types in our application, (ModifiedById), I can read the user name of the security context, but not the username.
  I have a view object, say UserInfoVO which contains the logged in users info.
  I know, I can create a new instance of the application at the bean module and using security context information, I can go get the user ID.

              ApplicationModule am =
                    Configuration.createRootApplicationModule(amDef, config);
                  ViewObject vo = am.findViewObject("UserInfoVO1"); // view criteria applied by default
                  vo.setNamedWhereClauseParam("bUserName", user); // user from security context
                  vo.executeQuery();

  I'm trying to access the current instance of the Application module in my java class customized, that is used to return the attribute history ModifiedById.
  

  //referring the blog
  
  http://jobinesh.blogspot.in/2011/02/creating-custom-history-types.html

  It is, how do I access the current instance of ApplicationModule in a class as * "HistoryAwareEntityImpl" * located in project template. ?
  
  any help will be appreciated.
  
  Kind regards
  Rognard

  OK, in this case, you get the transaction of db of the base class object and this object allows you to search the module of the application

  public final DBTransaction getDBTransaction();
  ...
  DBTransaction:
  public ApplicationModule findApplicationModule(java.lang.String amName)
  

  or if you get the application root module

  public ApplicationModule getRootApplicationModule()
  

  Timo

• A custom object to access class instance to the

  I created a few (TextInput, ComboBox, CheckBox) instances of the component (created as a public objects) in a Document class and added to the scene.

  Now, I created a class customized to a movieclip in the library and instantiated in the class of document (also a public proceeding).

  I need to access instances of the component in the custom class. How to do this?

  Also, it is advisable to use the ENTER_FRAME event frequently? because if I can't access the instances of components in the custom class above then I will remain no other choice than to use ENTER_FRAME event in the document class whenever I have to change a value in the components...

  So, is this a good practice?

  I think you're overloading the things why don't you just leave your document class adds a TextInput, and your button as his children? Then you can access both of them the class of document with ease.

• How to access the instance property of the main class via child class

  Hi I hv done 3 classes objecthandler, box and nav

  NAV is child chass objecthandler, I hv make an instance of objecthandler box and now I want to access the property of box via NAV... See the code

  Class Objecthandler

  package code {}
  import flash.display.MovieClip
  import code.box
  import code.nav
  
  public class objectHandler extends MovieClip {}
  public var container: box
  public var navigation: nav

  public void addObjects() {}
  
  Navigation = new nav()
  addChild (navigation)
  navigation.addEvents)
  navigation.x = 275
  navigation.y = 400
  
  container = new box()
  addChild (container)
  putcontainer ("default")< < works well here
  }
  public void putcontainer(page:String) {}
  Container.OpenPage (page) < < when this function is executed it returns ("page is open"+ page)
  }
  }
  }

  Class of NAV

  package code {}
  import flash.display.MovieClip
  import flash.events.MouseEvent
  import flash.display.DisplayObjectContainer
  import code.box
  
  public class nav extends objectHandler {}
  public void nav() {}
  
  }
  
  public void addEvents() {}
  homeBtn.addEventListener (MouseEvent.CLICK, releaseFun)
  galleryBtn.addEventListener (MouseEvent.CLICK, releaseFun)
  productsBtn.addEventListener (MouseEvent.CLICK, releaseFun)
  contactBtn.addEventListener (MouseEvent.CLICK, releaseFun)
  }
  
  public void releaseFun(event:MouseEvent):void {}
  putcontainer(Event.currentTarget.Name) < < showing the error over here
  }
  }
  }

  You should review your logic.

  It is not supposed have nav extend objectHandler and then has an objectHandler method that creates a new instance of nav.

• To access the upper class instance variables

  Hello
  
  See the code provided below. If home * variable 'i' is not set to 4, the output will be 3, if it is set, it will be 4.
  My question is... Well, I don't know exactly, there would be a lot. All this is strange to me.
  (For example, it seems that for the super class constructor runs when I access an instance of her variable).
  Could someone explain this topic or maybe help me to direct to an article?
  

  public class TryThis {
      
      public static void main (String args[]){
  
           Child c = new Child();
           c.seeSuper();   
      }
  }
  
  public class Parent {
  
       int i;
       
       Parent(){
            i = 3;
       }
  }
  
  public class Child extends Parent{
  
       Child(){
            //i = 4;  //***
       }
       
       public void seeSuper(){
            System.out.println(super.i);
       }
                      
  }

  Note: Parent could also simply look like this:

  public class Parent {
       int i = 3;
  }

  I see now that it is wrong to use the word 'object '.

  No, it isn't.

  they are there for the child to use, object

  That's where you're going wrong. Don't think about "the parent" and "child object. There is only one object, and it is mentioned by "this". You should think about members of the base or the classes and members of the (current) derived class. They are all members of the 'object', but the members of the base class can be hidden by the current members of class with the same name. That's all. Nothing too special about it.

  but they aren't the fields of it.

  Yes they are, but if they are hidden by local declarations that they are not visible to 'this', only to 'super '.

• How can I access all instances of the itemRenderer in a specific DataGridColumn?

  How can I access all instances of the itemRenderer in a specific DataGridColumn? Or, if I have a rowIndex and columnIndex, how do I get the itemRenderer to these clues?

  I use States to change the display of my itemRenderer of a TextField of a PopUpMenuButton. What I was trying to do was change back the display of all the other itemRenderers visible in the column of the textfield, when one of the itemRenderers displays the PopUpMenuButton.

  I tried to loop through all of the itemRenderers in the column and casting them as the class I was using and then by setting the currentState, but, it wasn't good performance wise and required too code. I simplified it listen to a change on the listData owner event (in my case a DataGrid, but any component ListBase) and by setting the currentState to null when it is triggered. Works like a charm.

• 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