Dynamically updated drop-down lists

Similar Questions

• update of a drop-down list of QML from C++ fails the first time

  Hey gang,

  I have a function in my C++ class that seeks a couple of drop downs by ObjectName and their Options adds.

  the feature works well - except that when the application first starts, the function cannot find the menu drop-down, then the drop-down list is empty.  At various times during the execution of the application, it refreshes the drop-down list and those all great works.  It is only on the first attempt when the application first starts it fails.

  Here's the function:

  void WorkManager::updateDropDown() {
  //  qWarning() << "WorkManager::updateDropDown(), running..";
  /*
   * this function updates the two drop down lists in the UI
   * it updates them dynamically with the taskName() ('label') of the job.
   * NOTE: for some reason, this doesn't find the dropdown's by name on first start.  however subsequent runs work fine.
   */
      int i = 0;
      QList  myObjects = m_model->toListOfObjects();
      DropDown * dpList = bb::cascades::Application::instance()->scene()->findChild("scriptListDropDown");
      DropDown * logDpList = bb::cascades::Application::instance()->scene()->findChild("logDropDown");
      if (dpList != 0 && logDpList !=0 ) {
          dpList->removeAll();
          logDpList->removeAll();
          for (i = 0; i < myObjects.size(); i++) {
              Task * myTask = static_cast (myObjects[i]);
              myTask->setParent(this);
              dpList->add(Option::create().text(myTask->taskLabel()).value(myTask->command()));
              logDpList->add(Option::create().text(myTask->taskLabel()).value(myTask->taskName() + ".log"));
          }
      } else  {
  //      qWarning() << "WorkManager::updateDropDown(), ---> dpList was 0, try again";
      }
  }
  

  so when the application starts, I get this message of qWarning() and dpList (and logDpList) are both 0.

  I tried the dissemination of calls to this function in various places at the same time the C++ class, so in onCreationCompleted() different signals in the QML IU - as for the homepage, TabbedPane, drop-down menus.

  No matter where and when I call, I can't get the drop-down list to provide information on the first try.

  is there a way to find a way to make this work?  It's (quite) a little annoying.  I wish that the onCreationCompleted() for the drop-down list would work, but alas, no joy.

  Help?

  Thank you!

  J

  Quite simply, if the object is not in the scene tree, you will get a result of findChild. It has not been created or added to the scene.

  You say that you did above in onCreationCompleted of a drop-down list, but this would only guarantee that one of your drop-down menus has been created and your conditional statement requires that both happening simultaneously be non-null. You must run the above, when the two objects are created.

  It seems that you can split the above function to manage separately, the dpList and logDpList after the onCreationCompleted of signals for each drop-down list.

  Note: If you run findChild on the user interface of your entire application, your application has a serious design flaw.

• dynamically load the Options in a drop-down list in C++

  Hey guys,.

  I'm trying to dynamically load items Option in a drop-down list by using C++.  I have a function in my class of WorkManager file that does the trick:

  QStringList WorkManager::getListOfItems() {
      int i = 0;
      QStringList taskNames;  // used for debugging mainly, so i can print the list out to debug
      QList  myObjects = m_model->toListOfObjects();
      DropDown * dpList = bb::cascades::Application::instance()->scene()->findChild("scriptListDropDown");
      if (dpList != 0 ) {
          dpList->setSelectedOption(0);
          dpList->removeAll();
          for (i = 0; i < myObjects.size(); i++) {
              Task * myTask = (Task *) myObjects[i];
              taskNames.append(myTask->taskName());
              dpList->add(Option::create().text(myTask->taskName()).value(myTask->command()));
  //          delete myTask;  // do I need to delete the task object?
          }
  //      qDebug() << "WorkManager::getLIstOfItems(), ---> list of tasks is : " << taskNames;
          return taskNames;
      } else  {
          qDebug() << "WorkManager::getListOfItems(), ---> dpList was 0";
          return taskNames;  // empty list
      }
  }
  

  I also found this thread:http://supportforums.blackberry.com/t5/Native-Development/Adding-options-to-a-DropDown-from-c/m-p/21... that helped me get the filled drop-down list when the application starts.

  However, I need to re - fill list from time to time, when the list (a GroupDataModel) changes.  calling the function above a second time anywhere in my application appears to hang the application immediately.

  I think / thought it might have something to do with the slot for the onSelectedValueChanged, but I can't understand it.

  It seems down right when I do dpList-> removeAll().

  I also can't seem to find the right place to call this function to an object of type in my class.  I think it's because the drop-down list is not ready yet as the dpList * is always 0 unless what I call after the line:

  app->setScene(root);
  

  in the applicationui.cpp file.  Calling it works on start-up, but trying to update the list later (by removeAll() and recreate) causes the app crashing.

  is there a better way to do it?  .. and make it safer?  I can't understand how to do this.

  Thank you!

  J

  First, drop the:

  dpList->setSelectedOption(0);
  

  Not only if it is not necessary, but it will explode your application if the function is called when there is already no options in the menu dropdown.

  Also, do NOT delete the task, because it is still owned by the datamodel. I also see that you use type casting C, which just blindly accepts your cast, even if it's a mistake. Instead, if you know for sure what kind it will be this way instead:

  Task* myTask = static_cast(myObjects[i]);
  

  If you are not sure if the type you are casting the is the type you need, use the dynamic_cast instead:

  Task* myTask = dynamic_cast(myObjects[i]);
  

  The advantage of this more static_cast , is that if you try to perform a type cast is not compatible, then myTask will be set to NULL.

  Alternatively, Qt offers a replacement for dynamic_cast which works on platforms where is not regular C++ casts.

  Task* myTask = qobject_cast(myObjects[i]);
  

  It is functionally equivalent to dynamic_cast, but as I said, it works on all platforms that Qt exists, whereas dynamic_cast cannot.

  Once you did get back to us.

  oddboy wrote:

  Hey guys,.

  I'm trying to dynamically load items Option in a drop-down list by using C++.  I have a function in my class of WorkManager file that does the trick:

  QStringList WorkManager::getListOfItems() {
      int i = 0;
      QStringList taskNames;  // used for debugging mainly, so i can print the list out to debug
      QList  myObjects = m_model->toListOfObjects();
      DropDown * dpList = bb::cascades::Application::instance()->scene()->findChild("scriptListDropDown");
      if (dpList != 0 ) {
          dpList->setSelectedOption(0);
          dpList->removeAll();
          for (i = 0; i < myObjects.size(); i++) {
              Task * myTask = (Task *) myObjects[i];
              taskNames.append(myTask->taskName());
              dpList->add(Option::create().text(myTask->taskName()).value(myTask->command()));
  //          delete myTask;  // do I need to delete the task object?
          }
  //      qDebug() << "WorkManager::getLIstOfItems(), ---> list of tasks is : " << taskNames;
          return taskNames;
      } else  {
          qDebug() << "WorkManager::getListOfItems(), ---> dpList was 0";
          return taskNames;  // empty list
      }
  }
  

  I also found this thread:http://supportforums.blackberry.com/t5/Native-Development/Adding-options-to-a-DropDown-from-c/m-p/21... that helped me get the filled drop-down list when the application starts.

  However, I need to re - fill list from time to time, when the list (a GroupDataModel) changes.  calling the function above a second time anywhere in my application appears to hang the application immediately.

  I think / thought it might have something to do with the slot for the onSelectedValueChanged, but I can't understand it.

  It seems down right when I do dpList-> removeAll().

  I also can't seem to find the right place to call this function to an object of type in my class.  I think it's because the drop-down list is not ready yet as the dpList * is always 0 unless what I call after the line:

  app->setScene(root);
  

  in the applicationui.cpp file.  Calling it works on start-up, but trying to update the list later (by removeAll() and recreate) causes the app crashing.

  is there a better way to do it?  .. and make it safer?  I can't understand how to do this.

  Thank you!

  J

• Barcode 1 d dynamic of several drop-down lists

  I worked on it for a while and I can't do things. I am using formcalc. I have a dynamic PDF form, I created with two drop-down lists. A drop-down list has elements such as the 'new' or 'Used' and the second drop-down list has a price list, such as "99 ¢ ' or '$ 1.99', etc. At the bottom of the form, there is an element of code 128 barcode barcode which is the value calculated - read-only. I am trying to use logic to combine both, where if you have selected 'New' and ' 99 ¢ "would that be the rawvalue of the code bars"NEW1"or something in that sense.

  Here's what I have so far:

  TopmostSubform.Page1.Shape.DropDownList1::calculate - (FormCalc, client)

  If (DropDownList1.value == "New" and DropDownList2.value is "99 cents") then BarCode1.rawValue == "NEW1" endif

  What I'm missing here?

  Please check the update below code.

  If (DropDownList1.value == "New" and DropDownList2.value is "99 cents") then BarCode1.rawValue == "NEW1" endif

  Update: if (DropDownList1. rawValue == 'NEW' and DropDownList2. ( rawValue == '99') then Code128BarCode1.rawValue = "Nouvelle1" endif

  the changes are highlighted and another is: BarCode1.rawValue = "Nouvelle1" ('is' not two 'is'. Two eqals 'is' for the purposes of comparison only, no assignment)

  -Rambeau.

• initialize a dynamic drop-down list

  I have a table (say table1) with 11 courses, of which 4 are foreign keys.
  When you create a new record, I use drop-down lists to fill 4 foreign key fields in table1.
  When I update the table 1, I use a drop-down list on the search page to select the record and pass it to the edit page via an URL parameter. No foreign keys appear in the new page into a field of text without problem and can be edited. Foreign keys can be displayed without problem, but if I want to change, I have to use a list of to do.
  
  Each foreign key is contained in a menu drop-down filled from its own set of records.
  
  Is there a way that these drop-down lists can be dynamically initialized to the foreign key value in Table 1? Or is there a better way to do it?
  
  Some of the key run in the hundreds, and having set all 4 manually before an update can be made is tedious.
  
  I work in php5 and Mysql.
  Howard Walker
  

  It solved!
  I was setting the initial value of the dynamic list of its own key, rather than the foreign key in table1.

  Must be getting old!
  Sorry to trouble you.

• Dynamic drop-down list in the Bay of cluster

  I have a table of cluster that contains two drop-down list boxes. The first drop-down list box control which Articles of the second drop-down list box by writing in the node property [StringsAndValues] for the second box. The problem I have is when I create a new index in the table of cluster and select different values in the drop-down list boxes, it changes the area of dynamic drop-down list on all indexes in the table. Attached, that's what I have so far.

  Thank you

  Chris

  Wow, what are the chances of another thread like this so early.

  Check out this other thread and look at the link of Hooovahh to see a great way to change the drop-down list box strings during execution to give the appearance different drop-down list boxes. The reality is that you can't have the combo box different types/lists in the same table. So what it is, is to check what element you are clicked on and change the behavior of the combobox as a result.

• Update zone drop-down list programmatically does not update its local variable

  Hi all

  I followed a Web site tutorial OR and programmatically change the items in a drop-down list box. It worked successfully, but not for local variables. Local variables while keeping the elements that had it before.

  Any suggestions?

  Thank you!

  

  You must update programmatically property value to change which returns the local variable, the value that you will wire does not match with one of the array strings.

  Maybe you need to do something like this to update your value to change the 'Two' to 'five '.

  

• How to dynamically add an Option in the drop-down list?

  I have this code:

  {Drop-down list

  ID: list

  Title: 'list '.

  onCreationCompleted: {}

  opion var = new Option();

  opion. Text = "Hello";
  opion. Value = 4;

  List.Add (opion);

  }

  }

  After the launch of the application, the list is empty.

  Why my code does not work?

  It is easy to dynamically add options

  first add this to your attachedObjects:

  ComponentDefinition {
              id: optionDefinition
              Option {
              }
          }
  

  then do something like this

  var newOption = optionDefinition.createObject()
              newOption.text = ...
              newOption.value = ...
              newOption.description = ...
              newOption.selected = ....
              yourDropDown.add(newOption)
  

• Dynamic region on the change from the drop-down list of values

  Hi Experts,

  Using the concept of dynamic region, I tried to use buttons as I have 4 buttons and clicking on each button, I am loading the particular taskflow. I used setPropertyListener and type = action to achieve this.

  I have a similar requirement, but I need to use the drop down list here...

  < af:selectOneChoice value = "#{mybean.value}" >

  < f: selectItem itemLabel = "First" Valeurelement = "FirstValue" / > "

  < f: selectItem itemLabel = "Second" Valeurelement = "SecondValue" / > "

  < f: selectItem itemLabel = "Third" Valeurelement = "ThirdValue" / > "

  < f: selectItem itemLabel = "fourth" Valeurelement = "FourthValue" / > "

  < / af:selectOneChoice >

  How can I dynamically load a region on the value selected by the user on top of the data. On the change of the value in the drop-down list, I need to load this particular dynamic region

  JDeveloper version 12.1.3

  Thanks in advance.

  You use a listener to change value of the duo down and detect the region according to the new value of the duo down.

  Timo

• Problems of dynamic drop-down list box

  Hello

  I have a requirement for a list dynamic downdown.

  I use javascript itself to fill the 2 text fields in the drop-down list.  I need the list/menu area drop down to be able to have options to input from the user and the drop-down list. I selected the "user entered - optional" compared to the setting but does not seem to work.

  The drop has used names and if a new employee joined this company and I do not know the end user can enter the name of the employee in the field.

  I have attached a pdf file version.

  Any ideas or help would be great.

  See you soon.

  Hello. All you have to do is check the box "Enable custom text entry". You can find the object box > cell phone

• The PHP/MySQL dynamic drop-down list

  I know this should be easier he became... I even bought two new books on PHP and Dreamweaver, and I'm still lost.
  
  I am trying to create a very simple search for a Web site. This research would be a category based with a drop-down list only search. There would also be an admin section that would add new records to the DB.
  
  So far, I have created a basic admin page that submits new records to the appropriate categories.
  
  I created a simple search with a dynamic Drop Down page, and I have created a basic results page.
  
  If the problem I have is that the Drop Down dynamic list shows the names of similar category according to the number of records exists. Where it should show only the unique category names.
  
  Once selected, the results page and the records are displayed correctly using a dynamic array.
  
  Anyone know what I should do to change this dynamic list so that it does not display the duplicate names?
  
  Thank you.

  destind4film wrote:
  > Can give you details on how to do it. I saw this same response in another
  > post in the forums but I do not understand where this setting is.

  This is a very basic SQL query. The SEPARATE after that SELECT keyword ensures
  that duplicate records are removed from the Recordset.

  > I checked my phpmyadmin and there is an option for single, but it will not
  > work for categories in my PB because there are naturally several entries
  > with the same name of category attached.

  UNIQUE is a type of index that forces a column to store only unique values.

  > I don't see this option in DW.

  You will not. Dreamweaver provides the absolute basics to create the
  code for working with a database. Unless you want to be severely limited in
  what you create, you have to learn a few basics of database
  design and build your own SQL queries.

  To add SEPARATE to your basic SQL query, you must click on the Advanced
  button in the Recordset dialog box and insert it into the SQL query by hand.

  --
  Adobe Community Expert David Powers
  Author, "The Essential Guide to Dreamweaver CS3" (friends of ED)
  Author, "PHP Solutions" (friends of ED)
  http://foundationphp.com/

• Update from the drop-down list on the duration

  Hello, I'm fairly new to Java and Blackberry development.

  I am doing an application with a few editable text fields and drop-down lists. What I want to do is to change the options from the drop-down list (ObjectChoiceField), according to what is written on the text fields, all without pressing a button. Can someone give me a hand here? I thought to use invalidateAll to redraw the field, but I'm not sure.

  Thank you.

  OK, something else, this looks bad for me:

  your having

  unitChoiceField.setChangeListener (editListener);

  But editListener is not defined until after that, so with that statement, you're

  the listener of null changes.

  Put this line after you set your headset to changes.

  Also we say something "does not work", is not very useful.  If please do some debugging and tell us what he does not she should do this, rather than saying that it does not work.  Imagine that you took your car be fixed and told them that it did not work.  Would they be able to fix it?

• Create a dynamic drop-down list field in Adobe Acrobat Pro XI

  Hi all. I am creating a field in one of my forms using Adobe Acrobat Pro XI. I have a drop down list of 'core' items, and according to what is selected in the list, I want a second drop-down list to give different choices. I've searched and searched and have javascript that I thought might work, but maybe I'm have a mistake or I'm place javascript code in the wrong place, because it does not work. I know very, very little about javascript, any help would be so appreciated.

  I use Adobe Acrobat Pro XI. I added a "new field" and selected "drop-down list. The domain name is ProvType. The options of the menu drop-down are:

  Hospitalized patients

  External consultations

  Doctor

  I have "Commit selected value immediately" selected. The field is not validated. The format is 'none '. There is no measures or calculations associated with it.

  I then created another dropbox and named SubProvType. Under Actions, I selected the trigger as the mouse upwards and then selected the Action "executes a JavaScript script. I selected the Add button and he hit in the JavaScript editor:

  Switch (ProvType.rawValue)

  {

  case "Hospitalisation":

  this.setItems ("Hospice, hospital, Nursing Facility");

  break;

  "outpatient": case

  this.setItems ("adult day Center, Home, others");

  break;

  case 'doctor ':

  this.setItems ("surgeon, general practitioner, neurologist");

  break;

  }

  What I want to do is:

  If "Hospitalization" is selected, I want only the following options to be available in the second drop-down list box "SubProvType":

  Palliative care

  Hospital

  Nursing facility

  If "outpatient" is selected, I want only the following options to be available in the second drop-down list box "SubProvType":

  Adult day Center

  Home

  Other

  If the 'doctor' is selected, I want these options to be available in the second drop-down list box "SubProvType":

  Surgeon

  Family practice

  Neurologist

  However... when I close form editing and try to select a different option in the ProvType field, SubProvType field is left blank and there is no options available. Also, there are no errors.

  I must be missing something, but I have no idea where to start. Thank you in advance for any help anyone can provide.

  Use this code as the ProvType custom validation script (and remove any code that you have associated with SubProvType):

  switch (event.value) {
      case "Inpatient":
          this.getField("SubProvType").setItems(["Hospice,Hospital,Nursing Facility"]);
          break;
      case "Outpatient":
          this.getField("SubProvType").setItems(["Adult Day Center,Home,Other"]);
          break;
      case "Physician":
          this.getField("SubProvType").setItems(["Surgeon,Family Practice,Neurologist"]);
          break;
  }
  

• Using dynamic drop-down list

  I've seen countless videos and read a lot of posts on how to create drop down menus, but the script I write still does not work. I am trying to create something pretty basic. I have two drop-down menus on two different pages. The value of the drop-down list on the first page will decide what appears on the drop-down list on the other page. I specified values of element for both lists. Any help would be greatly appreciated. Thanks in advance. So far, the code I created is as follows:

  switch (this.rawValue) { }

  case "1" :

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem ("primary insured
  "or staff 24/7");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("70%-working torque");

  breaking ;

  case "2" :

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem ("primary insured or personal 24/7");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("70%-working torque");

  breaking ;

  case "3" :

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied 3-6 month/year");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied more than 6 month/year");

  breaking ;

  case "4" :

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied 3-6 month/year");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied more than 6 month/year");

  breaking ;

  case "5" :

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied 3-6 month/year");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied more than 6 month/year");

  breaking ;

  case "6"

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied 3-6 month/year");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied more than 6 month/year");

  breaking ;

  case "7"

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied 3-6 month/year");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied more than 6 month/year");

  breaking ;

  by default:

  OccupancyDropDown.addItem ("Please choose
  "" "Occupation");

  breaking ;

  }

  Hi, in your code need you 2 things...-> «:»

  case "6": <>

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied 3-6 month/year");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied more than 6 month/year");

  break;

  case "7": <>

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied 3-6 month/year");

  ShortList.WaterFireBurglary.WaterDamageOccupancy.addItem
  ("Unoccupied more than 6 month/year");

  break;

• Trying to install the CS4 update but old software not in the drop-down list

  CS4 was installed on my XP machine in 2010 - and I remember having to call support because the previous version, I had (Studio 8) was not part of the drop-down list where you select your old version.

  Now my XP computer is about to be deleted and I tried to re - install CS4 on my Win7 machine. Once again - same problem.

  I have a Studio 8 serial number... and Studio MX too. But neither in the drop-down list.

  Please notify.

  Contact by web chat support and ask them to generate a series of work for you.

  Mylenium