QML LandmarkModel Element

Detailed Description

This element is part of the QtMobility.location 1.1 module.

LandmarkModel provides a model of landmarks from the landmarks store. The contents of the model can be specified with a filter, and sorted with the LandmarkAbstractModel::sortBy and LandmarkAbstractModel::sortOrder properties. Whether the model is automatically updated when the store or filter changes, can be controlled with LandmarkAbstractModel::autoUpdate property.

There are two ways of accessing the landmark data: through model by using views and delegates, or alternatively via landmarks list property. Of the two, the model access is preferred. Direct list access (i.e. non-model) is not guaranteed to be in order set by sortBy and sortOrder.

At the moment only data role provided by the model is landmark (Landmark). Through that one can access any data provided by the Landmark element.

The following example illustrates fetching of all landmarks in ascending name order. Example illustrates both model access as well as direct list access.

 Rectangle {
     width: 350
     height: 350

     // The model
     LandmarkModel {
         id: myLandmarkModel
         sortBy: LandmarkModel.NameSort;
         sortOrder: LandmarkModel.AscendingOrder
         limit: 15
         onLandmarksChanged: {
             // Direct list access
             for (var index = 0; index < landmarks.length; index++)  {
                 console.log("Index, name:" + index + " , " + landmarks[index].name);
             }
         }
     }
     // The view
     ListView {
         id: myLandmarkListView
         model: landmarkModel
         delegate: myLandmarkListDelegate
         width: parent.width; height: parent.height
         highlightFollowsCurrentItem: false
         focus: true
         anchors.fill: parent
         keyNavigationWraps: true
     }
     // The delegate
     Component {
         id: myLandmarkListDelegate
         Item {
             width: 200; height: 20
             Text {id: nameField; text: landmark.name }
             Text { id: phoneField; text: "  tel:"  + landmark.phoneNumber; anchors.left: nameField.right;}
         }
     }
 }

See also LandmarkAbstractModel, LandmarkCategoryModel, and QLandmarkManager.

Property Documentation

 LandmarkNameFilter {
     id: coralFilter
     name: "Flinders Reef"
 }

 LandmarkModel {
     id: landmarkModel
     filter: coralFilter
     // Alternatively filter could be declared directly, e.g:
     /*
     filter: LandmarkIntersectionFilter {
         LandmarkNameFilter {
             ...
         }
         LandmarkUnionFilter {
             LandmarkIntersectionFilter {
                 LandmarkNameFilter {
                     ...
                 }
                 LandmarkProximityFilter {
                     ...
                 }
             }
         }
     }
     */
     limit: 100
 }

 LandmarkModel {
     id: landmarkModelForImport
     importFile: "mylandmarkfile.gpx"
 }

 LandmarkModel {
     id: landmarkModelForIteration
     onLandmarksChanged: {
         console.log("log: Landmark count is: "+ count);
         for (var index = 0; index < landmarks.length; index++)  {
             console.log("Index, name:" + index + " , " + landmarks[index].name);
         }
     }
 }

Method Documentation