The ImageModel type provides a model of place images. 更多...
import 语句: | import QtLocation 5.15 |
Since: | QtLocation 5.5 |
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. |
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 } } }
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.