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1 + 要实现一个完整的 Harmattan 应用，涵盖**预览页面**、**登录页面**、**主时间线页面**，并且包含导航逻辑和 API 调用，可以基于 QML 和 C++ 代码进行。以下是一个基于你的需求的完整项目结构及其代码示例。
2 +
3 + ### 项目结构
4 +
5 + - `main.cpp`: 应用入口，初始化 QML 环境和 C++ 类。
6 + - `YourApp.qml`: 主要的 UI 界面，包括预览、登录和主时间线页面。
7 + - `YourCppClass.cpp` / `YourCppClass.h`: C++ 类，用于处理 API 请求和数据通信。
8 +
9 + ---
10 +
11 + ### 1. `main.cpp` - 应用入口
12 +
13 + ```cpp
14 + #include <QtGui/QApplication>
15 + #include <QtDeclarative>
16 + #include "YourCppClass.h"
17 +
18 + int main(int argc, char *argv[])
19 + {
20 + QApplication app(argc, argv);
21 +
22 + QDeclarativeView view;
23 + YourCppClass yourCppClassInstance;
24 +
25 + view.rootContext()->setContextProperty("yourCppClassInstance", &yourCppClassInstance);
26 + view.setSource(QUrl::fromLocalFile("qml/YourApp.qml"));
27 +
28 + view.show();
29 + return app.exec();
30 + }
31 + ```
32 +
33 + ---
34 +
35 + ### 2. `YourCppClass.h` - C++ 类定义
36 +
37 + ```cpp
38 + #ifndef YOURCPPCLASS_H
39 + #define YOURCPPCLASS_H
40 +
41 + #include <QObject>
42 + #include <QtNetwork>
43 +
44 + class YourCppClass : public QObject
45 + {
46 + Q_OBJECT
47 + public:
48 + explicit YourCppClass(QObject *parent = nullptr);
49 +
50 + Q_INVOKABLE void loadPublicTimeline(const QString &instanceUrl);
51 + Q_INVOKABLE void login(const QString &instanceUrl, const QString &username, const QString &password);
52 + Q_INVOKABLE void loadHomeTimeline();
53 +
54 + signals:
55 + void publicTimelineLoaded(const QVariantList &timelineData);
56 + void loginSuccess();
57 + void homeTimelineLoaded(const QVariantList &timelineData);
58 +
59 + private slots:
60 + void onPublicTimelineReceived();
61 + void onLoginFinished();
62 + void onHomeTimelineReceived();
63 +
64 + private:
65 + QNetworkAccessManager *networkManager;
66 + QString accessToken;
67 + };
68 +
69 + #endif // YOURCPPCLASS_H
70 + ```
71 +
72 + ---
73 +
74 + ### 3. `YourCppClass.cpp` - C++ 类实现
75 +
76 + ```cpp
77 + #include "YourCppClass.h"
78 + #include <QJsonDocument>
79 + #include <QJsonArray>
80 + #include <QJsonObject>
81 +
82 + YourCppClass::YourCppClass(QObject *parent) : QObject(parent)
83 + {
84 + networkManager = new QNetworkAccessManager(this);
85 + }
86 +
87 + void YourCppClass::loadPublicTimeline(const QString &instanceUrl)
88 + {
89 + QUrl url(instanceUrl + "/api/v1/timelines/public");
90 + QNetworkRequest request(url);
91 +
92 + QNetworkReply *reply = networkManager->get(request);
93 + connect(reply, &QNetworkReply::finished, this, &YourCppClass::onPublicTimelineReceived);
94 + }
95 +
96 + void YourCppClass::onPublicTimelineReceived()
97 + {
98 + QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
99 + if (reply) {
100 + QByteArray response = reply->readAll();
101 + QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
102 + QJsonArray jsonArray = jsonDoc.array();
103 +
104 + QVariantList timelineData;
105 + for (const QJsonValue &value : jsonArray) {
106 + QJsonObject obj = value.toObject();
107 + QVariantMap post;
108 + post["username"] = obj["account"].toObject()["username"].toString();
109 + post["content"] = obj["content"].toString();
110 + timelineData.append(post);
111 + }
112 +
113 + emit publicTimelineLoaded(timelineData);
114 + }
115 + }
116 +
117 + void YourCppClass::login(const QString &instanceUrl, const QString &username, const QString &password)
118 + {
119 + QUrl url(instanceUrl + "/oauth/token");
120 + QNetworkRequest request(url);
121 +
122 + request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
123 +
124 + QByteArray data;
125 + data.append("username=" + username + "&password=" + password);
126 +
127 + QNetworkReply *reply = networkManager->post(request, data);
128 + connect(reply, &QNetworkReply::finished, this, &YourCppClass::onLoginFinished);
129 + }
130 +
131 + void YourCppClass::onLoginFinished()
132 + {
133 + QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
134 + if (reply) {
135 + QByteArray response = reply->readAll();
136 + QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
137 + QJsonObject jsonObj = jsonDoc.object();
138 +
139 + accessToken = jsonObj["access_token"].toString();
140 + emit loginSuccess();
141 + }
142 + }
143 +
144 + void YourCppClass::loadHomeTimeline()
145 + {
146 + QUrl url("https://mastodon.example.com/api/v1/timelines/home");
147 + QNetworkRequest request(url);
148 + request.setRawHeader("Authorization", "Bearer " + accessToken.toUtf8());
149 +
150 + QNetworkReply *reply = networkManager->get(request);
151 + connect(reply, &QNetworkReply::finished, this, &YourCppClass::onHomeTimelineReceived);
152 + }
153 +
154 + void YourCppClass::onHomeTimelineReceived()
155 + {
156 + QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
157 + if (reply) {
158 + QByteArray response = reply->readAll();
159 + QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
160 + QJsonArray jsonArray = jsonDoc.array();
161 +
162 + QVariantList timelineData;
163 + for (const QJsonValue &value : jsonArray) {
164 + QJsonObject obj = value.toObject();
165 + QVariantMap post;
166 + post["username"] = obj["account"].toObject()["username"].toString();
167 + post["content"] = obj["content"].toString();
168 + timelineData.append(post);
169 + }
170 +
171 + emit homeTimelineLoaded(timelineData);
172 + }
173 + }
174 + ```
175 +
176 + ---
177 +
178 + ### 4. `YourApp.qml` - QML UI 文件
179 +
180 + ```qml
181 + import QtQuick 1.1
182 + import com.nokia.meego 1.0
183 +
184 + PageStackWindow {
185 + id: appWindow
186 + initialPage: previewPage
187 +
188 + Component {
189 + id: previewPage
190 + Page {
191 + title: "Public Timeline Preview"
192 +
193 + Column {
194 + spacing: 10
195 + width: parent.width
196 +
197 + TextField {
198 + id: instanceUrl
199 + placeholderText: "Enter instance URL"
200 + onTextChanged: {
201 + yourCppClassInstance.loadPublicTimeline(instanceUrl.text);
202 + }
203 + }
204 +
205 + ListView {
206 + id: publicTimeline
207 + model: publicTimelineModel
208 +
209 + delegate: Item {
210 + width: parent.width
211 + height: 80
212 + Column {
213 + Text { text: model.username }
214 + Text { text: model.content }
215 + }
216 + }
217 +
218 + OpacityMask {
219 + anchors.fill: parent
220 + maskSource: Gradient {
221 + GradientStop { position: 0.8; color: "transparent" }
222 + GradientStop { position: 1.0; color: "black" }
223 + }
224 + }
225 + }
226 +
227 + Button {
228 + text: "Login"
229 + onClicked: {
230 + appWindow.pageStack.push(loginPage);
231 + }
232 + }
233 + }
234 +
235 + ListModel {
236 + id: publicTimelineModel
237 + }
238 +
239 + Connections {
240 + target: yourCppClassInstance
241 + onPublicTimelineLoaded: {
242 + publicTimelineModel.clear();
243 + for (var i = 0; i < timelineData.length; i++) {
244 + publicTimelineModel.append(timelineData[i]);
245 + }
246 + }
247 + }
248 + }
249 + }
250 +
251 + Component {
252 + id: loginPage
253 + Page {
254 + title: "Login"
255 +
256 + Column {
257 + TextField { id: username; placeholderText: "Username" }
258 + TextField { id: password; placeholderText: "Password"; echoMode: TextInput.Password }
259 +
260 + Button {
261 + text: "Login"
262 + onClicked: {
263 + yourCppClassInstance.login(instanceUrl.text, username.text, password.text);
264 + }
265 + }
266 + }
267 +
268 + Connections {
269 + target: yourCppClassInstance
270 + onLoginSuccess: {
271 + appWindow.pageStack.push(mainTimelinePage);
272 + }
273 + }
274 + }
275 + }
276 +
277 + Component {
278 + id: mainTimelinePage
279 + Page {
280 + title: "Home Timeline"
281 +
282 + Column {
283 + ListView {
284 + id: homeTimeline
285 + model: homeTimelineModel
286 + delegate: Item {
287 + width: parent.width
288 + height: 80
289 + Column {
290 + Text { text: model.username }
291 + Text { text: model.content }
292 + }
293 + }
294 + }
295 +
296 + Row {
297 + anchors.bottom: parent.bottom
298 + Button { text: "Home" }
299 + Button { text: "Notifications" }
300 + Button { text: "Account" }
301 + }
302 + }
303 +
304 + Connections {
305 + target: yourCppClassInstance
306 + onHomeTimelineLoaded: {
307 + homeTimelineModel.clear();
308 + for (var i = 0; i < timelineData.length; i++) {
309 + homeTimelineModel.append(timelineData[i]);
310 + }
311 + }
312 + }
313 + }
314 + }
315 + }
316 + ```
317 +
318 + ---
319 +
320 + ### 5. 总结
321 +
322 + 这个完整的应用包含了预览页面、登录页面、主时间线页面，支持实例公共时间线的查看、用户登录，以及主时间线的显示。你可以根据实际情况调整 API 请求、页面布局以及样式。
323 +
324 + 主要功能：
325 +
326 + 1. **预览页面**：输入实例地址并查看公共时间线，带有渐隐效果。
327 + 2. **登录页面**：用户输入用户名和密码，执行 Mastodon 实例的登录验证。
328 + 3. **主时间线页面**：显示用户的主时间线，并有底部导航栏切换到其他页面（通知、个人账户等）。
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