[FrankZ10]

Hello, hope someone can help me with a small problem, is there anything special that needs to be declared or registered for a C++ function to be available in different QML files. At the moment I can only access the functions from my mail.qml file.

I have a MyListView.qml file which customizes a listview for me, and I can't get the C++ functions to work in the QML.

Ohh, forgot to mention i'm a total noob when it comes to C++ and QML, but want to take stab at it.


CODE:

mail.cpp

// List with context menu project template
#include "tldrapp.h"
#include <bb/cascades/Application>
#include <QLocale>
#include <QTranslator>

// include JS Debugger / CS Profiler enabler
// this feature is enabled by default in the debug build only
#include <Qt/qdeclarativedebug.h>
#include <bb/data/DataSource>
#include <bb/data/DataSourceType>
#include <bb/data/DataSource>

using namespace bb::cascades;


Q_DECL_EXPORT int main(int argc, char **argv)
{

	qmlRegisterType<TLDRApp>();

	bb::data::DataSource::registerQmlTypes();

    // this is where the server is started etc
	TLDRApp app(argc, argv);
    //Application app(argc, argv);

    // localization support
    QTranslator translator;
    QString locale_string = QLocale().name();
    QString filename = QString( "MyShows_%1" ).arg( locale_string );
    if (translator.load(filename, "app/native/qm")) {
        app.installTranslator( &translator );
    }

    // create the application pane object to init UI etc.
   // new ApplicationUI(&app);


    // we complete the transaction started in the app constructor and start the client event loop here
    return Application::exec();
    // when loop is exited the Application deletes the scene which deletes all its children (per qt rules for children)
}

mail.qml

import bb.cascades 1.0
import bb.data 1.0
import bb.system 1.0

Page {
    titleBar: TitleBar {
        id: myTitle
        title: "My First App"
    }

    Container {

        ImageView { // CoverImage - Poster
            id: myPoster
            imageSource: {
                tldrApp.ImagePath("es");  // TESTING ONLY, IT DOES RETURN THE PROPER VALUE IN tldrapp.cpp
            }
            preferredWidth: 110.0
            preferredHeight: 150.0
            scalingMethod: ScalingMethod.AspectFit
        }

        ListView {
        dataModel: dataModel
        listItemComponents: [
            ListItemComponent {
                type: "item"
                MyListView {}
            }
        ]
    }
    attachedObjects: [
        GroupDataModel {
            id: dataModel
            grouping: ItemGrouping.None
            sortingKeys: ["DATETIMEFEED"]
        },
        DataSource {
            id: dataSource
            source: "URL TO XML FILE"
            query: "/Feed/items/item"
            type: DataSourceType.Xml
            onDataLoaded: {
                    dataModel.clear();

                    var tempdata = new Array();

                    for (var i = data.length-1; i >= 0; i--) {

                            // Create a Date object for the publication Date (for easier presentation)
                        var newDate = new Date(Date.parse(data[i].DateTIMEFEED, "dd mmmm yyyy h:MM:ss o"));

                        tempdata[i] = data[i]

                        tempdata[i].Name= data[i].Name
                        tempdata[i].Description= data[i].Description
                        tempdata[i].Imagepath= data[i].Imagepath

                        // Set the date
                        tempdata[i].DATETIMEFEED= newDate;


                    }

                    // Finally insert the data in the dataModel and it will be presented in the list.
                    dataModel.insertList(tempdata)
                }
            }
    ]
    onCreationCompleted: {
        dataSource.load();
    }
}
}

MyListView.QML

import bb.cascades 1.0
import bb.data 1.0
import bb.system 1.0

Container{
    layout: DockLayout {
    }
    topPadding: 6.0
    bottomPadding: 6.0
    
    Divider {
        id: myDivider
    }
    
    Container { //ListViewLayout
        
        layout: AbsoluteLayout {
        }
        verticalAlignment: VerticalAlignment.Center

        
        ImageView { 
            id: myPoster
            imageSource: {
                tldrApp.ImagePath(ListItemData.Imagepath);  // NOTHING HAPPENS HERE
            }
            preferredWidth: 110.0
            preferredHeight: 150.0
            scalingMethod: ScalingMethod.AspectFit
            layoutProperties: AbsoluteLayoutProperties {
                positionY: 6.0
            }
        }     
         
        Label {
            id: myName
            text:  {
                tldrApp.ImagePath("TESTING");  // NOTHING HAPPENS HERE, SHOULD RETURN THE PATH AS IT DOES IN mail.qml
            }
            layoutProperties: AbsoluteLayoutProperties {
                positionY: 5.0
                positionX: 120.0
            }
            textStyle.fontSize: FontSize.PointValue
            textStyle.fontSizeValue: 8.0
        }
        
        Label {
            id: myDescription
            text: ListItemData.Description
            layoutProperties: AbsoluteLayoutProperties {
                positionY: 55.0
                positionX: 130.0
            }
            textFormat: TextFormat.Plain
            textStyle.fontSizeValue: 6.0
            visible: true
            textStyle.fontSize: FontSize.PointValue
        }
        
        Label {
            id: myDate
            text: "Date: " + Qt.formatDate(ListItemData.DATETIMEFEED, "dddd, MMMM dd, yyyy")
            layoutProperties: AbsoluteLayoutProperties {
                positionY: 90.0
                positionX: 130.0
            }
            textFormat: TextFormat.Plain
            textStyle.fontSizeValue: 6.0
            visible: true
            textStyle.fontSize: FontSize.PointValue
        } 
    }

}

tldrapp.h -> straight copy from Blackberry's samples, with one or two additions.

/* Copyright (c) 2012 Research In Motion Limited.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef RSSAPP_H_
#define RSSAPP_H_

#include <QVariant>
#include <bb/cascades/Application>

/**
 * Main class of the app, has a few utility functions for parsing RSSfeeds for
 * images and stripping out HTML.
 *
 * You will learn how to:
 * - Download images asynchronously
 * - Parse RSS
 */
class TLDRApp: public bb::cascades::Application
{
    Q_OBJECT

public:
    TLDRApp(int argc, char **argv);
    virtual ~TLDRApp();

    /*
     * Utility function to strip html-formatting.
     *
     * @param htmlString The string that is going to be stripped.
     */
    Q_INVOKABLE QString plainText(const QString htmlString);
    Q_INVOKABLE QString ImagePath(const QString locateImage);

    /*
     * The RSS feed format has grown over the years, so we need to parse
     * the data to find the images
     *
     * @param item Data item containing an RSS entry that is parsed for a suitable image
     * @return A string with the image path return "" if no image was found
     */
    Q_INVOKABLE QString findImage(const QVariant item);
};

#endif /* RSSAPP_H_ */

tldrapp.cpp -> again from Blackberry sample with a couple omissions.

/* Copyright (c) 2012 Research In Motion Limited.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "tldrapp.h"
#include "netimagemanager.h"
#include "netimagetracker.h"
#include <bb/cascades/QmlDocument>
#include <bb/cascades/AbstractPane>
#include <bb/data/DataSource>
#include <bb/system/SystemDialog>
#include <QDir>

using namespace bb::cascades;
using namespace bb::data;
using namespace bb::system;

TLDRApp::TLDRApp(int argc, char **argv) :
        		Application(argc, argv)
{
	//qmlRegisterType<TLDRApp>();
	DataSource::registerQmlTypes();

	// 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);

	qml->setContextProperty("tldrApp", this);

	// create root object for the UI
	AbstractPane *root = qml->createRootObject<AbstractPane>();

	// set created root object as a scene
	setScene(root);
}

TLDRApp::~TLDRApp()
{

}


QString TLDRApp::ImagePath(const QString locateImage)
{
	QString path = "app/native/assets/images/NoImage.png";

	QFile file("app/native/assets/images/NoImage.png");
	if (file.exists()){
		return "asset:///images/NoImage.png";
	}
	else{
		return "not Here";
	}
}

[world boss]

paste your code here or on some other site like pastebin. maybe you forgot to import something

[world boss]

QmlDocument *qml2 = QmlDocument::create("asset:///MyListView.qml").parent(this);
qml2->setContextProperty("tldrApp", this);

does it work when you put this right before "// create root object for the UI" in tldrapp.cpp?
edit: on the git they use qmlRegisterType and import by the first argument(nickname). so you can also try import nickname 1.0 in MyListView.QML

qmlRegisterType<NetImageTracker>("nickname", 1, 0, "NetImageTracker");

https://github.com/blackberry/Cascad...rc/tldrapp.cpp

[FrankZ10]

Thank you for the suggestions, didn't work for me. I'm going to try and get one of the samples and try to build from there, but if anyone may know why please let the community know. From all the samples that I've looked at it appears that the functions should be available on all qml files.

once again, thank you for the suggestions.