CMake+QT+大漠插件的桌面应用开发（QThread）
文章目录
- CMake+QT+大漠插件的桌面应用开发（QThread）
-
- 简介
- 环境
- 项目结构
- 配置编译环境
- 代码
CMake+QT+大漠插件的桌面应用开发（QThread）
简介
-
在CMake+QT+大漠插件的桌面应用开发中已经给出了QT配合大漠插件开发桌面应用的样例
-
不过由于主窗口的UI操作和大漠的调用是在一个线程里面的，所以当大漠调用时间过长时会出现UI界面卡顿的现象
-
我们可以利用子线程处理耗时操作，处理完后再由主线程（UI线程）更新界面，这样界面就不会出现卡顿。
-
在这里，我们将会用到QThread，调整后的QT主线程与子线程交互逻辑图如下：
-
交互逻辑描述
- 当点击“注册”选项时，会发出
regDM信号，子线程接收到该信号会执行MyMainWorker中的doRegDM方法，执行完成后会发出regDMReady信号，主线程接收到该信号会执行更新UI的操作 - 当点击“搜索”按钮时，同理
- 当点击“截图”按钮时，同理
- 当点击“注册”选项时，会发出
环境
| 版本/规范 | 备注 | |
|---|---|---|
| 平台 | win32 | 操作系统为Windows10 |
| CMake | 3.27.8 | CLion自带 |
| C++ | 17 | |
| Toolchain | VisualStudio 2022 | 只用其工具链，记得先安装好 |
| QT | 5.12.12 | 安装时选择msvc2017，不要64位的 |
| DM | 7.2353 | |
| CLion | 2023.3.2 | 你也可以用其他IDE工具 |
- 启动IDE时，记得以管理员模式启动
项目结构
- 新建一个项目 qt_dm_demo_x_02
- 目录同CMake+QT+大漠插件的桌面应用开发中一致，会多出MyMainWorker，用于处理子线程逻辑
qt_dm_demo_x_02 # 项目目录
-- ......
--MyMainWorker.cpp
--MyMainWorker.h
-- ......
配置编译环境
- 其他同CMake+QT+大漠插件的桌面应用开发中一致
- CMakeLists.txt 文件中生成可执行文件时，会多出MyMainWorker.cpp、MyMainWorker.h
# 生成可执行文件
add_executable(${PROJECT_NAME} main.cpp
strutils.cpp strutils.h
dmutil.cpp dmutil.h
mymainwindow.cpp mymainwindow.h mymainwindow.ui
MyMainWorker.cpp MyMainWorker.h
)
代码
- dmutil.h、dmutil.cpp、strutils.h、strutils.cpp、mymainwindow.ui、main.cpp同CMake+QT+大漠插件的桌面应用开发中一致
- mymainwindow.h
#ifndef QT_DM_DEMO_X_MYMAINWINDOW_H
#define QT_DM_DEMO_X_MYMAINWINDOW_H
#include - mymainwindow.cpp
// You may need to build the project (run Qt uic code generator) to get "ui_MyMainWindow.h" resolved
#include " );
qRegisterMetaType<vector<MyWindow>>("vector" );
// Init Views
setFixedSize(1280, 720);
ui->tableWidget->setColumnCount(3);
ui->tableWidget->setHorizontalHeaderLabels(QStringList() << "进程ID" << "句柄" << "标题");
ui->tableWidget->horizontalHeader()->setStretchLastSection(true); // 最后一列自动铺满表格
// ui->tableWidget->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Stretch);
ui->tableWidget->horizontalHeader()->setHighlightSections(false);
ui->tableWidget->horizontalHeader()->setStyleSheet("QHeaderView::section{background:gray;}");
ui->tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
QFont font = ui->tableWidget->horizontalHeader()->font();
font.setBold(true);
ui->tableWidget->horizontalHeader()->setFont(font);
ui->tableWidget->setStyleSheet("QTableWidget::item:hover { background-color: lightblue; }");
ui->tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers); // 禁止编辑
ui->tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows); // 选中整行
// Init Listener
auto worker = new MyMainWorker;
worker->moveToThread(&workerThread);
connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);
// 注册大漠
connect(ui->actionReg, &QAction::triggered, [this]() {
ui->actionReg->setEnabled(false);
emit this->regDM(&this->pCommonDm);
});
connect(this, &MyMainWindow::regDM, worker, &MyMainWorker::doRegDM);
connect(worker, &MyMainWorker::regDMReady, this, &MyMainWindow::showMessageBox);
// 查找窗口
connect(ui->btnQuery, &QPushButton::clicked, [this]() {
ui->btnQuery->setEnabled(false);
emit this->findWindow(this->pCommonDm, ui->edtTitle->text());
});
connect(this, &MyMainWindow::findWindow, worker, &MyMainWorker::doFindWindow);
connect(worker, &MyMainWorker::findWindowReady, this, &MyMainWindow::showTable);
// 截图
connect(ui->btnCapture, &QPushButton::clicked, [this]() {
ui->btnCapture->setEnabled(false);
// 获取选中行的句柄列的字段
const QList<QTableWidgetItem *> &selectedItems = ui->tableWidget->selectedItems();
if (selectedItems.size() >= 2) {
QTableWidgetItem *item = selectedItems.at(1);
const QString &hwnd = item->data(Qt::DisplayRole).toString();
bool res = false;
long hwndL = hwnd.toLong(&res, 0);
cout << res << endl;
if (res) {
emit this->captureWindow(this->pCommonDm, hwndL);
} else {
ui->btnCapture->setEnabled(true);
this->showWarn("选中行的窗口句柄解析异常！");
}
} else {
ui->btnCapture->setEnabled(true);
this->showWarn("请选中列表中的其中一行！");
}
});
connect(this, &MyMainWindow::captureWindow, worker, &MyMainWorker::doCaptureWindow);
connect(worker, &MyMainWorker::captureWindowReady, this, &MyMainWindow::showMessageBox);
workerThread.start();
}
MyMainWindow::~MyMainWindow() {
delete ui;
workerThread.quit();
workerThread.wait();
}
void MyMainWindow::showInfo(const QString &message, const QString &title) {
QMessageBox::information(this, title, message);
}
void MyMainWindow::showWarn(const QString &message, const QString &title) {
QMessageBox::critical(this, title, message);
}
void MyMainWindow::showMessageBox(const bool result, const QString& message) {
ui->actionReg->setEnabled(true);
ui->btnCapture->setEnabled(true);
if (result) {
this->showInfo(message);
} else {
this->showWarn(message);
}
}
void MyMainWindow::showTable(const bool result, const QString &msg, const vector<MyWindow> &windowVec) {
ui->btnQuery->setEnabled(true);
if (result) {
auto rowNum = windowVec.size();
ui->tableWidget->setRowCount(rowNum);
for (int i = 0; i < rowNum; ++i) {
const MyWindow &item = windowVec[i];
ui->tableWidget->setItem(i, 0, new QTableWidgetItem(QString::number(item.processId)));
ui->tableWidget->setItem(i, 1, new QTableWidgetItem(QString::number(item.hwnd)));
ui->tableWidget->setItem(i, 2, new QTableWidgetItem(QString::fromStdWString(item.title)));
}
} else {
this->showWarn(msg);
}
}
- MyMainWorker.h
#ifndef QT_DM_DEMO_X_MYMAINWORKER_H
#define QT_DM_DEMO_X_MYMAINWORKER_H
#include - MyMainWorker.cpp
#include ==========" << endl;
emit this->regDMReady(false, "DM 注册失败！");
return;
}
cout << "========== Initial DM ==========" << endl;
cout << endl;
emit this->regDMReady(true, "DM 注册完成！");
}
void MyMainWorker::doFindWindow(Idmsoft *pDm, const QString &title) {
vector<MyWindow> windowVec;
if (pDm == nullptr) {
cout << "this->pCommonDm == nullptr" << endl;
emit this->findWindowReady(false, "请先在菜单中完成注册！", windowVec);
return;
}
// 找一下包含title的窗口
getMatchedWindows(windowVec, pDm, title.toStdWString());
if (windowVec.empty()) {
cout << "can not find such window" << endl;
emit this->findWindowReady(false, "没有找到包含该标题的窗口！", windowVec);
return;
}
emit this->findWindowReady(true, "成功！", windowVec);
}
void MyMainWorker::doCaptureWindow(Idmsoft *pDm, long hwnd) {
if (pDm == nullptr) {
cout << "this->pCommonDm == nullptr" << endl;
emit this->captureWindowReady(false, "请先在菜单中完成注册！");
return;
}
// 绑定窗口句柄
long dmBind = pDm->BindWindowEx(
hwnd,
"normal",
"normal",
"normal",
"",
0
);
if (dmBind == 1) {
// 恢复并激活指定窗口，置顶窗口，
pDm->SetWindowState(hwnd, 12);
pDm->SetWindowState(hwnd, 8);
pDm->delay(600);
// 延迟一下截图，存到相对路径
wstring filename = wstring(L"./capture_window_").append(std::to_wstring(hwnd)).append(L".bmp");
long retCap = pDm->Capture(0, 0, 2000, 2000, filename.c_str());
if (retCap != 1) {
cout << "capture failed" << endl;
emit this->captureWindowReady(false, "截图失败！");
} else {
cout << "capture success" << endl;
emit this->captureWindowReady(true, QString::fromStdWString(L"截图成功，保存地址为： " + filename));
}
// 取消置顶窗口
pDm->SetWindowState(hwnd, 9);
} else {
cout << "DM BindWindow failed" << endl;
emit this->captureWindowReady(false, "绑定窗口异常！");
}
pDm->UnBindWindow();
}