String bounded to the listview
I have a property string delimited in a qml which I want to display in the form of a simple list in qml.
I tried arraydatamodel without success.
Any help will be appreciated.
Thank you
Mukesh
Looks like OP is having 2 numbers, or is not quite explain his problem. Since the original post, I thought the same thing as @radwon and believed that OP wanted to build a dataModel off delimited string. But her reply, I think he's trying to access this delimited string of its ListItemComponent, which cannot be done directly, but need to access from its ListView using ListItem.view
Here is a screenshot of the official ListView docs indicating that
Maybe the OP maybe specify exactly what he must do.
Tags: BlackBerry Developers
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Pass a variable value set to the selector to the Listview
This was probably picked several times on the forum, but I'm going crazy with research and try to do things with my code.
Everything I'm doing is to expose the variable rssmobileEnabled defined in the SELECTOR, so that I can go and test it in my LISTVIEW onSelectedValueChanged IF statement, according to the code below.
I did the variable in "BOLD" below to indicate. This must be a simple solution, after all how it can be difficult to just define a global variable...
The SELECTOR code:
Picker { id: picker title: "Select Feed" dataModel: XmlDataModel { source: "models/blackberry.xml" } pickerItemComponents: [ PickerItemComponent { type: "rsslink" content: Container { layout: DockLayout { } Label { multiline: false text: pickerItemData.text textStyle { base: SystemDefaults.TextStyles.SubtitleText } } } } ] onSelectedValueChanged: { var rsslinktext = (dataModel.data([ 0, picker.selectedIndex(0) ]).text); var rsslink = (dataModel.data([ 0, picker.selectedIndex(0) ]).rssSource); var rsslinkquery = (dataModel.data([ 0, picker.selectedIndex(0) ]).rssQuery); var rssmobileEnabled = (dataModel.data([ 0, picker.selectedIndex(0)]).mobileEnabled); //Load the selected feed dataSource.load(); } } // PickerCode of the LISTVIEW:
ListView { id: myListView // Associate the list view with the data model that's defined in the // attachedObjects list dataModel: dataModellist layout: StackListLayout {} listItemComponents: [ ListItemComponent { id: header type: "header" //"item" //custom components used instead of standardlistitem Container { Label { id: emptytextheader text: "" } } }, ListItemComponent { id: item type: "item" //"description" Container { layout: DockLayout {} //custom components used instead of standardlistitem Container { id: itemdetails Label { id: title text: ListItemData.title //textStyle.fontWeight: FontWeight.Bold multiline: true textStyle.color: Color.Cyan } Label { id: pubdate text: ListItemData.pubDate textStyle.color: Color.create("#ff00c200") textStyle.fontSize: FontSize.XSmall } Label { id: description text: ListItemData.description textStyle.fontSize: FontSize.Small multiline: true textStyle.color: Color.Yellow maxHeight: 130.0 } } } } ] onTriggered: { var feedItem = dataModel.data(indexPath); var page = detailsPage.createObject(); if (rssmobileEnabled == "y") { ..... } } }Hello
"var rssMobileEnabled" declares a local variable, is not available in onTriggered.
Declare it as a property instead:
TopLevelItem { property bool rssMobileEnabled (or 'property string' if it's a character)reference it without prefix "var":
rssMobileEnabled =...
You can also declare the property on another element (not necessarily higher level) and reference it by id:
elementId.rssMobileEnabled
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"Index was outside the bounds of the array"
Hello
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ESXi
version 4.0.0
Generation 5044850
vSphere
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2013-07-21 16:55:33.103 [viclient:SoapTran] invoke Start 38, RetrieveContents on PropertyCollector: ha-property-collector [10.0.0.250]. [Appellant: VirtualInfrastructure.PropertyRetriever.InvokePropertyGet]
[viclient:SoapTran] 2013-07-21 16:55:33.118 invoke RetrieveContents on PropertyCollector 38 finish: ha-property-collector [10.0.0.250] - series: 0.001, server: 000.024
[: ShowExcp] 16:55:35.879 2013-07-21 System.IndexOutOfRangeException: Indeksen var utenfor matrisegrensen.
ved VMware.CustomControls.NumericUpdownEx... ctor()
ved VMware.CustomControls.DiskCapControl.InitializeComponent)
ved VMware.CustomControls.DiskCapControl... ctor()
ved VpxClient.VMConfig.BWzVDiskCapPage.InitializeComponent)
ved VpxClient.VMConfig.BWzVDiskCapPage... ctor (TocWizard myBoss)
ved VpxClient.VMConfig.NWz... ctor (NWzModes m)
ved VpxClient.Common.UiCommands.VirtualMachine.NewOrImportVM (import Boolean, forceVmtn Boolean, entity, Service iService ManagedEntity)
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to VpxClientCommon.Util.Dialogs.ShowException (IWin32Window, String, Exception)
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Thomas Isaksen
Hello
Have you checked this post?
Kind regards
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esam_tec wrote:
Hello guys,.
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Let explain me my code. It is marked with I work and what does not work and its expected behavior.
Should work behavior
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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?
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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
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It works but I'm not sure what you're trying to do
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How to apply filters to the Listview created using GroupDataModel?
Hello
I have created a listview with groupdatamodel, now I want to apply filters for listview. How to do this?
Please help me. (As looking for contacts)
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Hello
I found the solution for the application of filters to the listview.
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[Explanation necessary] Clears the listview data and fill it again with new data
Hello
I correctly filled a listview in c ++, data analysed and does interesting things with it. However, I am drunk stumbling, unable to find a way delete and repopulate my display of the list...
Question 1:- How can after I insert data in the list view, I clear the list data and run again the same method (init) who populated the list view with the data in the first place?
Here are the docs that I referenced and I don't understand how to implement the methods in my code.
QList - clear() method
https://developer.BlackBerry.com/Cascades/reference/QList.html#clear
Using the data access Code, example
data_access/using_data_sourceGroupDataModel - Clear()
https://developer.BlackBerry.com/Cascades/reference/bb__cascades__groupdatamodel.html#clear
CODE
Here is my code - filling of the display of the list of C++ and display of data in a ListView.MyApp.cpp
MyApp::MyApp(bb::cascades::Application *app) : QObject(app){ // create scene document from main.qml asset // set parent to created document to ensure it exists for the whole application lifetime QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this); AbstractPane *root = qml->createRootObject(); qml->setContextProperty("yoyo",this); //grab references list_view = root->findChild MyApp.hpp
// Tabbed pane project template #ifndef MyApp_HPP_ #define MyApp_HPP_ #include
#include #include #include #include #include namespace bb { namespace cascades { class Application; } } namespace bb { namespace data { class Application; } } /*! * @brief Application pane object * *Use this object to create and init app UI, to create context objects, to register the new meta types etc. */ class MyApp: public QObject { Q_OBJECT public: MyApp(bb::cascades::Application *app); virtual ~MyApp() { } Q_INVOKABLE void init(); private slots: void requestFinished(QNetworkReply *reply); private: QNetworkAccessManager *mNetworkAccessManager; QNetworkRequest *request; QFile *json; bb::cascades::ListView *list_view; }; #endif /* MyApp_HPP_ */ hand. QML
import bb.cascades 1.0 Page{ Container { background: Color.White ListView { id: listView preferredHeight: maxHeight objectName: "listView" listItemComponents: [ ListItemComponent { type: "item" Container { Container { Label { text: ListItemData.id } } } } ] onTriggered: { console.log("selected_index: " + indexPath) } horizontalAlignment: HorizontalAlignment.Center verticalAlignment: VerticalAlignment.Center } } }Question 2:
How reference to the ListView object with the name "listView" in different parts of the MyApp.cpp file? Is there anything else I should add to the header file to make the accessible listView?
Question 3:
What happens when you call the clear() method? How the data model is affected? How the user interface is affected? What happens in memory?
Question 4:
How do you verify that the data in the list has been deleted so that you can go ahead and fills again with new data? What is the cheque that I perform?
I would also like to know how you manage multiple views of lists and data sources in your applications. Best practices or ideas?
Thank you
I was able to clear the listview with the following code, if anyone is interested.
listView.dataModel = null
The dataModel must be set to "null".
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Hello
I have the following list:
ListView { id: channelsList dataModel: categoryModel listItemComponents: [ ListItemComponent { type: "item" StandardListItem { title: ListItemData.name // Channel name imageSource: ListItemData.imageFile status: ListItemData.id id: channelItemId contextActions: [ ActionSet { //title: contentView.title ActionItem { title: "Add to Favorites" onTriggered: { console.log(ListItemData.id + " will be added to the Favorites"); //categoryModel.addFavorite(ListItemData.name, ListItemData.imageFile, ListItemData.id); channelItemId.ListItem.view.viewTriggered(ListItemData.name, ListItemData.imageFile, ListItemData.id); } } } ] } } ] onTriggered: { var chosenChannel = dataModel.data(indexPath); console.log("indexPath: " + indexPath); var playingPage = playpagedef.createObject(); playingPage.chname = chosenChannel.name; playingPage.cid = chosenChannel.id; playingPage.init(); Qt.nav.push(playingPage); } attachedObjects: [ // The bucket categoryModel is a non visible object so it is set up as an attached object. // The categoryModel itself is a QListDataModel defined in categorymodel.h and registered // as a type in the creation of the application. CategoryModel { id: categoryModel // The path to the JSON file with initial data, this file will be moved to // the data folder on the first launch of the application (in order to // be able to get write access). jsonAssetPath: "models/channels.json" // The filtering is initially set to "Category 1" to show category channels filter: label.text }, ComponentDefinition { id: playpagedef source: "PlayingPage.qml" } ] function viewTriggered(name, imageFile, id) { categoryModel.addFavorite(name, imageFile, id); categoryModel.clear(); } }and the categoeymodel.h is as follows:
#ifndef _CATEGORYMODEL_H #define _CATEGORYMODEL_H #include
#include #include #include using namespace bb::data; // The category categoryModel is based on the QListDataModel template, which in turn // implements the abstract DataModel class. typedef bb::cascades::QListDataModel CategoryListModel; /* CategoryModel Description: * * CategoryModel class for the Category List application, the data categoryModel * reads and write from a JSON file that keeps all item data * for the list. */ class CategoryModel: public CategoryListModel { Q_OBJECT Q_PROPERTY(QString filter READ filter WRITE setFilter NOTIFY filterChanged) Q_PROPERTY(QString jsonAssetPath READ jsonAssetPath WRITE setJsonAssetPath NOTIFY jsonAssetPathChanged) public: /** * Constructor that sets up the recipe * @param parent The parent Container, if not specified, 0 is used */ CategoryModel(QObject *parent = 0); ~CategoryModel(); QString filter(); void setFilter(const QString filter); QString jsonAssetPath(); void setJsonAssetPath(const QString jsonAssetPath); signals: void filterChanged(QString filter); void jsonAssetPathChanged(QString jsonAssetPath); public slots: void addFavorite(QString channelName, QString channelImageFile, int channelId); private: bool jsonToDataFolder(); // Property variables QString mFilter; QString mJsonAssetsPath; QString mJsonDataPath; // A list containing all data read from the JSON file QVariantList mData; //Invocation variables bb::cascades::Invocation* mInvocation; }; #endif // ifndef _CATEGORYMODEL_H My problem is that the listview is not get automatically updated when a new item is added to the datamodel (a favorite channel is added). I have to exit the application and restart to see the updated list.
categoryModel.addFavorite(name, imageFile, id); categoryModel.clear();
categoryModel.clear ();
does not work. I get:
Asset: / / / hand. QML:180: TypeError: result of expression 'categoryModel.clear' [undefined] is not a function.
I would like to know how to achieve using approach "more correct".
QListDataModel does not expose its internal storage directly. It is possible to reconstruct the map by performing an iteration in a loop (with the help of data() and size() methods), the dataModel entries:
http://developer.BlackBerry.com/Cascades/reference/bb__cascades__qlistdatamodel.html
but I don't see how this could help. If the filtered data is changed, it must be merged with the original sort data.
Why the original approach has not worked?
I could not understand from the description appearance of the interface user, please post a screenshot if possible.
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entry point not found qtcore4.dll
does anyone know how and where to load .dll files, the files qtcoree.dll and qtsql4.dll to launch software programs open source?
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Can not do a homegroup between PC w / Win 7 and laptop w / Win 8
I have a router with wireless capabilities and my PC is connected to it and my laptop is wireless and internet connections are large. I had a successful homegroup before but I had to unplug my PC to clean/redesign for the new office. Now, I can 'cr