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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。
### 项目结构
- `main.cpp`: 应用入口，初始化 QML 环境和 C++ 类。
- `YourApp.qml`: 主要的 UI 界面，包括预览、登录和主时间线页面。
- `YourCppClass.cpp` / `YourCppClass.h`: C++ 类，用于处理 API 请求和数据通信。
---
### 1. `main.cpp` - 应用入口
```cpp
#include <QtGui/QApplication>
#include <QtDeclarative>
#include "YourCppClass.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QDeclarativeView view;
YourCppClass yourCppClassInstance;
view.rootContext()->setContextProperty("yourCppClassInstance", &yourCppClassInstance);
view.setSource(QUrl::fromLocalFile("qml/YourApp.qml"));
view.show();
return app.exec();
}
```
---
### 2. `YourCppClass.h` - C++ 类定义
```cpp
#ifndef YOURCPPCLASS_H
#define YOURCPPCLASS_H
#include <QObject>
#include <QtNetwork>
class YourCppClass : public QObject
{
Q_OBJECT
public:
explicit YourCppClass(QObject *parent = nullptr);
Q_INVOKABLE void loadPublicTimeline(const QString &instanceUrl);
Q_INVOKABLE void login(const QString &instanceUrl, const QString &username, const QString &password);
Q_INVOKABLE void loadHomeTimeline();
signals:
void publicTimelineLoaded(const QVariantList &timelineData);
void loginSuccess();
void homeTimelineLoaded(const QVariantList &timelineData);
private slots:
void onPublicTimelineReceived();
void onLoginFinished();
void onHomeTimelineReceived();
private:
QNetworkAccessManager *networkManager;
QString accessToken;
};
#endif // YOURCPPCLASS_H
```
---
### 3. `YourCppClass.cpp` - C++ 类实现
```cpp
#include "YourCppClass.h"
#include <QJsonDocument>
#include <QJsonArray>
#include <QJsonObject>
YourCppClass::YourCppClass(QObject *parent) : QObject(parent)
{
networkManager = new QNetworkAccessManager(this);
}
void YourCppClass::loadPublicTimeline(const QString &instanceUrl)
{
QUrl url(instanceUrl + "/api/v1/timelines/public");
QNetworkRequest request(url);
QNetworkReply *reply = networkManager->get(request);
connect(reply, &QNetworkReply::finished, this, &YourCppClass::onPublicTimelineReceived);
}
void YourCppClass::onPublicTimelineReceived()
{
QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
if (reply) {
QByteArray response = reply->readAll();
QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
QJsonArray jsonArray = jsonDoc.array();
QVariantList timelineData;
for (const QJsonValue &value : jsonArray) {
QJsonObject obj = value.toObject();
QVariantMap post;
post["username"] = obj["account"].toObject()["username"].toString();
post["content"] = obj["content"].toString();
timelineData.append(post);
}
emit publicTimelineLoaded(timelineData);
}
}
void YourCppClass::login(const QString &instanceUrl, const QString &username, const QString &password)
{
QUrl url(instanceUrl + "/oauth/token");
QNetworkRequest request(url);
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
QByteArray data;
data.append("username=" + username + "&password=" + password);
QNetworkReply *reply = networkManager->post(request, data);
connect(reply, &QNetworkReply::finished, this, &YourCppClass::onLoginFinished);
}
void YourCppClass::onLoginFinished()
{
QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
if (reply) {
QByteArray response = reply->readAll();
QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
QJsonObject jsonObj = jsonDoc.object();
accessToken = jsonObj["access_token"].toString();
emit loginSuccess();
}
}
void YourCppClass::loadHomeTimeline()
{
QUrl url("https://mastodon.example.com/api/v1/timelines/home");
QNetworkRequest request(url);
request.setRawHeader("Authorization", "Bearer " + accessToken.toUtf8());
QNetworkReply *reply = networkManager->get(request);
connect(reply, &QNetworkReply::finished, this, &YourCppClass::onHomeTimelineReceived);
}
void YourCppClass::onHomeTimelineReceived()
{
QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
if (reply) {
QByteArray response = reply->readAll();
QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
QJsonArray jsonArray = jsonDoc.array();
QVariantList timelineData;
for (const QJsonValue &value : jsonArray) {
QJsonObject obj = value.toObject();
QVariantMap post;
post["username"] = obj["account"].toObject()["username"].toString();
post["content"] = obj["content"].toString();
timelineData.append(post);
}
emit homeTimelineLoaded(timelineData);
}
}
```
---
### 4. `YourApp.qml` - QML UI 文件
```qml
import QtQuick 1.1
import com.nokia.meego 1.0
PageStackWindow {
id: appWindow
initialPage: previewPage
Component {
id: previewPage
Page {
title: "Public Timeline Preview"
Column {
spacing: 10
width: parent.width
TextField {
id: instanceUrl
placeholderText: "Enter instance URL"
onTextChanged: {
yourCppClassInstance.loadPublicTimeline(instanceUrl.text);
}
}
ListView {
id: publicTimeline
model: publicTimelineModel
delegate: Item {
width: parent.width
height: 80
Column {
Text { text: model.username }
Text { text: model.content }
}
}
OpacityMask {
anchors.fill: parent
maskSource: Gradient {
GradientStop { position: 0.8; color: "transparent" }
GradientStop { position: 1.0; color: "black" }
}
}
}
Button {
text: "Login"
onClicked: {
appWindow.pageStack.push(loginPage);
}
}
}
ListModel {
id: publicTimelineModel
}
Connections {
target: yourCppClassInstance
onPublicTimelineLoaded: {
publicTimelineModel.clear();
for (var i = 0; i < timelineData.length; i++) {
publicTimelineModel.append(timelineData[i]);
}
}
}
}
}
Component {
id: loginPage
Page {
title: "Login"
Column {
TextField { id: username; placeholderText: "Username" }
TextField { id: password; placeholderText: "Password"; echoMode: TextInput.Password }
Button {
text: "Login"
onClicked: {
yourCppClassInstance.login(instanceUrl.text, username.text, password.text);
}
}
}
Connections {
target: yourCppClassInstance
onLoginSuccess: {
appWindow.pageStack.push(mainTimelinePage);
}
}
}
}
Component {
id: mainTimelinePage
Page {
title: "Home Timeline"
Column {
ListView {
id: homeTimeline
model: homeTimelineModel
delegate: Item {
width: parent.width
height: 80
Column {
Text { text: model.username }
Text { text: model.content }
}
}
}
Row {
anchors.bottom: parent.bottom
Button { text: "Home" }
Button { text: "Notifications" }
Button { text: "Account" }
}
}
Connections {
target: yourCppClassInstance
onHomeTimelineLoaded: {
homeTimelineModel.clear();
for (var i = 0; i < timelineData.length; i++) {
homeTimelineModel.append(timelineData[i]);
}
}
}
}
}
}
```
---
### 5. 总结
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。
主要功能：
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。
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。
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）。
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。
### 项目结构
- `main.cpp`: 应用入口，初始化 QML 环境和 C++ 类。
- `YourApp.qml`: 主要的 UI 界面，包括预览、登录和主时间线页面。
- `YourCppClass.cpp` / `YourCppClass.h`: C++ 类，用于处理 API 请求和数据通信。
---
### 1. `main.cpp` - 应用入口
```cpp
#include <QtGui/QApplication>
#include <QtDeclarative>
#include "YourCppClass.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QDeclarativeView view;
YourCppClass yourCppClassInstance;
view.rootContext()->setContextProperty("yourCppClassInstance", &yourCppClassInstance);
view.setSource(QUrl::fromLocalFile("qml/YourApp.qml"));
view.show();
return app.exec();
}
```
---
### 2. `YourCppClass.h` - C++ 类定义
```cpp
#ifndef YOURCPPCLASS_H
#define YOURCPPCLASS_H
#include <QObject>
#include <QtNetwork>
class YourCppClass : public QObject
{
Q_OBJECT
public:
explicit YourCppClass(QObject *parent = nullptr);
Q_INVOKABLE void loadPublicTimeline(const QString &instanceUrl);
Q_INVOKABLE void login(const QString &instanceUrl, const QString &username, const QString &password);
Q_INVOKABLE void loadHomeTimeline();
signals:
void publicTimelineLoaded(const QVariantList &timelineData);
void loginSuccess();
void homeTimelineLoaded(const QVariantList &timelineData);
private slots:
void onPublicTimelineReceived();
void onLoginFinished();
void onHomeTimelineReceived();
private:
QNetworkAccessManager *networkManager;
QString accessToken;
};
#endif // YOURCPPCLASS_H
```
---
### 3. `YourCppClass.cpp` - C++ 类实现
```cpp
#include "YourCppClass.h"
#include <QJsonDocument>
#include <QJsonArray>
#include <QJsonObject>
YourCppClass::YourCppClass(QObject *parent) : QObject(parent)
{
networkManager = new QNetworkAccessManager(this);
}
void YourCppClass::loadPublicTimeline(const QString &instanceUrl)
{
QUrl url(instanceUrl + "/api/v1/timelines/public");
QNetworkRequest request(url);
QNetworkReply *reply = networkManager->get(request);
connect(reply, &QNetworkReply::finished, this, &YourCppClass::onPublicTimelineReceived);
}
void YourCppClass::onPublicTimelineReceived()
{
QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
if (reply) {
QByteArray response = reply->readAll();
QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
QJsonArray jsonArray = jsonDoc.array();
QVariantList timelineData;
for (const QJsonValue &value : jsonArray) {
QJsonObject obj = value.toObject();
QVariantMap post;
post["username"] = obj["account"].toObject()["username"].toString();
post["content"] = obj["content"].toString();
timelineData.append(post);
}
emit publicTimelineLoaded(timelineData);
}
}
void YourCppClass::login(const QString &instanceUrl, const QString &username, const QString &password)
{
QUrl url(instanceUrl + "/oauth/token");
QNetworkRequest request(url);
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
QByteArray data;
data.append("username=" + username + "&password=" + password);
QNetworkReply *reply = networkManager->post(request, data);
connect(reply, &QNetworkReply::finished, this, &YourCppClass::onLoginFinished);
}
void YourCppClass::onLoginFinished()
{
QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
if (reply) {
QByteArray response = reply->readAll();
QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
QJsonObject jsonObj = jsonDoc.object();
accessToken = jsonObj["access_token"].toString();
emit loginSuccess();
}
}
void YourCppClass::loadHomeTimeline()
{
QUrl url("https://mastodon.example.com/api/v1/timelines/home");
QNetworkRequest request(url);
request.setRawHeader("Authorization", "Bearer " + accessToken.toUtf8());
QNetworkReply *reply = networkManager->get(request);
connect(reply, &QNetworkReply::finished, this, &YourCppClass::onHomeTimelineReceived);
}
void YourCppClass::onHomeTimelineReceived()
{
QNetworkReply *reply = qobject_cast<QNetworkReply*>(sender());
if (reply) {
QByteArray response = reply->readAll();
QJsonDocument jsonDoc = QJsonDocument::fromJson(response);
QJsonArray jsonArray = jsonDoc.array();
QVariantList timelineData;
for (const QJsonValue &value : jsonArray) {
QJsonObject obj = value.toObject();
QVariantMap post;
post["username"] = obj["account"].toObject()["username"].toString();
post["content"] = obj["content"].toString();
timelineData.append(post);
}
emit homeTimelineLoaded(timelineData);
}
}
```
---
### 4. `YourApp.qml` - QML UI 文件
```qml
import QtQuick 1.1
import com.nokia.meego 1.0
PageStackWindow {
id: appWindow
initialPage: previewPage
Component {
id: previewPage
Page {
title: "Public Timeline Preview"
Column {
spacing: 10
width: parent.width
TextField {
id: instanceUrl
placeholderText: "Enter instance URL"
onTextChanged: {
yourCppClassInstance.loadPublicTimeline(instanceUrl.text);
}
}
ListView {
id: publicTimeline
model: publicTimelineModel
delegate: Item {
width: parent.width
height: 80
Column {
Text { text: model.username }
Text { text: model.content }
}
}
OpacityMask {
anchors.fill: parent
maskSource: Gradient {
GradientStop { position: 0.8; color: "transparent" }
GradientStop { position: 1.0; color: "black" }
}
}
}
Button {
text: "Login"
onClicked: {
appWindow.pageStack.push(loginPage);
}
}
}
ListModel {
id: publicTimelineModel
}
Connections {
target: yourCppClassInstance
onPublicTimelineLoaded: {
publicTimelineModel.clear();
for (var i = 0; i < timelineData.length; i++) {
publicTimelineModel.append(timelineData[i]);
}
}
}
}
}
Component {
id: loginPage
Page {
title: "Login"
Column {
TextField { id: username; placeholderText: "Username" }
TextField { id: password; placeholderText: "Password"; echoMode: TextInput.Password }
Button {
text: "Login"
onClicked: {
yourCppClassInstance.login(instanceUrl.text, username.text, password.text);
}
}
}
Connections {
target: yourCppClassInstance
onLoginSuccess: {
appWindow.pageStack.push(mainTimelinePage);
}
}
}
}
Component {
id: mainTimelinePage
Page {
title: "Home Timeline"
Column {
ListView {
id: homeTimeline
model: homeTimelineModel
delegate: Item {
width: parent.width
height: 80
Column {
Text { text: model.username }
Text { text: model.content }
}
}
}
Row {
anchors.bottom: parent.bottom
Button { text: "Home" }
Button { text: "Notifications" }
Button { text: "Account" }
}
}
Connections {
target: yourCppClassInstance
onHomeTimelineLoaded: {
homeTimelineModel.clear();
for (var i = 0; i < timelineData.length; i++) {
homeTimelineModel.append(timelineData[i]);
}
}
}
}
}
}
```
---
### 5. 总结
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。
主要功能：
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。
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。
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）。