怎样得到QML package的具体API接口

虽然我们的developer站点有丰富的API介绍，可是，有些API的介绍可能并不全，有些API也在不断地演进中。

为了得到更具体的API，我们能够通过例如以下的命令来得到更加具体的信息。比方我们对“SingleDownload”API来得到更加多的信息。

$qmlplugindump Ubuntu.DownloadManager 0.1

显示的结果例如以下：

import QtQuick.tooling 1.1


// This file describes the plugin-supplied types contained in the library.
// It is used for QML tooling purposes only.
//
// This file was auto-generated by:
// 'qmlplugindump Ubuntu.DownloadManager 0.1'


Module {
    Component {
        name: "Ubuntu::DownloadManager::DownloadError"
        prototype: "QObject"
        exports: ["Error 0.1"]
        exportMetaObjectRevisions: [0]
        Property { name: "type"; type: "string"; isReadonly: true }
        Property { name: "message"; type: "string"; isReadonly: true }
    }
    Component {
        name: "Ubuntu::DownloadManager::SingleDownload"
        prototype: "QObject"
        exports: ["SingleDownload 0.1"]
        exportMetaObjectRevisions: [0]
        Property { name: "autoStart"; type: "bool" }
        Property { name: "errorMessage"; type: "string"; isReadonly: true }
        Property { name: "isCompleted"; type: "bool"; isReadonly: true }
        Property { name: "downloadInProgress"; type: "bool"; isReadonly: true }
        Property { name: "allowMobileDownload"; type: "bool" }
        Property { name: "throttle"; type: "qulonglong" }
        Property { name: "progress"; type: "int"; isReadonly: true }
        Property { name: "downloading"; type: "bool"; isReadonly: true }
        Property { name: "downloadId"; type: "string"; isReadonly: true }
        Property { name: "headers"; type: "QVariantMap" }
        Signal {
            name: "canceled"
            Parameter { name: "success"; type: "bool" }
        }
        Signal {
            name: "finished"
            Parameter { name: "path"; type: "string" }
        }
        Signal {
            name: "paused"
            Parameter { name: "success"; type: "bool" }
        }
        Signal {
            name: "processing"
            Parameter { name: "path"; type: "string" }
        }
        Signal {
            name: "progressReceived"
            Parameter { name: "received"; type: "qulonglong" }
            Parameter { name: "total"; type: "qulonglong" }
        }
        Signal {
            name: "resumed"
            Parameter { name: "success"; type: "bool" }
        }
        Signal {
            name: "started"
            Parameter { name: "success"; type: "bool" }
        }
        Signal {
            name: "errorFound"
            Parameter { name: "error"; type: "DownloadError&" }
        }
        Signal { name: "errorChanged" }
        Method {
            name: "registerError"
            Parameter { name: "error"; type: "Error"; isPointer: true }
        }
        Method {
            name: "bindDownload"
            Parameter { name: "download"; type: "Download"; isPointer: true }
        }
        Method {
            name: "unbindDownload"
            Parameter { name: "download"; type: "Download"; isPointer: true }
        }
        Method {
            name: "onFinished"
            Parameter { name: "path"; type: "string" }
        }
        Method {
            name: "onProgress"
            Parameter { name: "received"; type: "qulonglong" }
            Parameter { name: "total"; type: "qulonglong" }
        }
        Method {
            name: "onPaused"
            Parameter { name: "wasPaused"; type: "bool" }
        }
        Method {
            name: "onResumed"
            Parameter { name: "wasResumed"; type: "bool" }
        }
        Method {
            name: "onStarted"
            Parameter { name: "wasStarted"; type: "bool" }
        }
        Method {
            name: "onCanceled"
            Parameter { name: "wasCanceled"; type: "bool" }
        }
        Method { name: "start" }
        Method { name: "pause" }
        Method { name: "resume" }
        Method { name: "cancel" }
        Method {
            name: "download"
            Parameter { name: "url"; type: "string" }
        }
    }
    Component {
        name: "Ubuntu::DownloadManager::UbuntuDownloadManager"
        prototype: "QObject"
        exports: ["DownloadManager 0.1"]
        exportMetaObjectRevisions: [0]
        Property { name: "autoStart"; type: "bool" }
        Property { name: "cleanDownloads"; type: "bool" }
        Property { name: "errorMessage"; type: "string"; isReadonly: true }
        Property { name: "downloads"; type: "QVariantList"; isReadonly: true }
        Signal { name: "errorChanged" }
        Method {
            name: "download"
            Parameter { name: "url"; type: "string" }
        }
    }
}

我们通过使用“finished”信号能够得到下载完毕的事件而进行分别的处理！

另外一个样例（Push notification)

liuxg@liuxg:~$ qmlplugindump Ubuntu.PushNotifications 0.1
import QtQuick.tooling 1.1

// This file describes the plugin-supplied types contained in the library.
// It is used for QML tooling purposes only.
//
// This file was auto-generated by:
// 'qmlplugindump Ubuntu.PushNotifications 0.1'

Module {
    Component {
        name: "PushClient"
        prototype: "QObject"
        exports: ["PushClient 0.1"]
        exportMetaObjectRevisions: [0]
        Property { name: "appId"; type: "string" }
        Property { name: "token"; type: "string"; isReadonly: true }
        Property { name: "notifications"; type: "QStringList"; isReadonly: true }
        Property { name: "status"; type: "string"; isReadonly: true }
        Property { name: "persistent"; type: "QStringList"; isReadonly: true }
        Property { name: "count"; type: "int" }
        Signal {
            name: "countChanged"
            Parameter { type: "int" }
        }
        Signal {
            name: "notificationsChanged"
            Parameter { type: "QStringList" }
        }
        Signal {
            name: "persistentChanged"
            Parameter { type: "QStringList" }
        }
        Signal {
            name: "appIdChanged"
            Parameter { type: "string" }
        }
        Signal {
            name: "error"
            Parameter { type: "string" }
        }
        Signal {
            name: "tokenChanged"
            Parameter { type: "string" }
        }
        Signal {
            name: "statusChanged"
            Parameter { type: "string" }
        }
        Method { name: "getNotifications" }
        Method {
            name: "notified"
            Parameter { name: "appId"; type: "string" }
        }
        Method { name: "emitError" }
        Method {
            name: "clearPersistent"
            Parameter { name: "tags"; type: "QStringList" }
        }
    }
}