ImageModel QML Type

The ImageModel type provides a model of place images. 更多...

import 语句：	import QtLocation 5.12
Since:	QtLocation 5.5

所有成员列表，包括继承成员

特性

batchSize : int
place : Place
totalCount : int

详细描述

The ImageModel is a read-only model used to fetch images related to a Place . Binding a Place 凭借 ImageModel::place initiates an initial fetch of images. The model performs fetches incrementally and is intended to be used in conjunction with a View such as a ListView . When the View reaches the last of the images currently in the model, a fetch is performed to retrieve more if they are available. The View is automatically updated as the images are received. The number of images which are fetched at a time is specified by the batchSize property. The total number of images available can be accessed via the totalCount 特性。

The model returns data for the following roles:

角色	类型	描述
url	url	The URL of the image.
imageId	string	The identifier of the image.
mimeType	string	The MIME type of the image.
supplier	Supplier	The supplier of the image.
user	User	The user who contributed the image.
attribution	string	Attribution text which must be displayed when displaying the image.

范例

The following example shows how to display images for a place:

import QtQuick 2.0
import QtPositioning 5.5
import QtLocation 5.6
ImageModel {
    id: imageModel
    batchSize: 3
    place: place
}
ListView {
    anchors.top: parent.top
    width: parent.width
    spacing: 10
    model: imageModel
    orientation: ListView.Horizontal
    snapMode: ListView.SnapOneItem
    delegate: Item {
        width: listView.width
        height: listView.height
        Image {
            anchors.fill: parent
            source: url
            fillMode: Image.PreserveAspectFit
        }
        Text {
            text: supplier.name + "\n" + supplier.url
            width: parent.width
            anchors.bottom: parent.bottom
        }
    }
}

特性文档编制

batchSize : int

This property holds the batch size to use when fetching more image items.

place : Place

This property holds the Place that the images are for.

totalCount : int

This property holds the total number of image items for the place.