QT界面：子窗口与父窗口交互

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QT界面：子窗口与父窗口交互

2023-11-11 06:24| 来源: 网络整理| 查看: 265

环境：Win10-x64+VS2015+Qt5.9.7

首先创建一个Qt GUI Application，工程名为tabWidget。

头文件

tabWidget.h

#pragma once #include #include #include #include #include #include #include #include "ui_tabWidget.h" #pragma execution_character_set("utf-8") class tabWidget : public QMainWindow { Q_OBJECT public: tabWidget(QWidget *parent = Q_NULLPTR); private: Ui::tabWidgetClass ui; QPushButton *startGrabbingPushButton; QPushButton *stopGrabbingPushButton; private slots: void runPushButtonSlot(); }; 源文件 #include "tabWidget.h" tabWidget::tabWidget(QWidget *parent) : QMainWindow(parent) { ui.setupUi(this); QHBoxLayout *hlayout1 = new QHBoxLayout; QRadioButton *continusModeRadioButton = new QRadioButton(tr("连续")); QRadioButton *triggerModeRadioButton = new QRadioButton(tr("触发")); hlayout1->addWidget(continusModeRadioButton); hlayout1->addWidget(triggerModeRadioButton); QHBoxLayout *hlayout2 = new QHBoxLayout; startGrabbingPushButton = new QPushButton(tr("开始")); startGrabbingPushButton->setStyleSheet("background-color: rgb(0, 255, 127);"); QObject::connect(startGrabbingPushButton, SIGNAL(clicked()), this, SLOT(runPushButtonSlot())); stopGrabbingPushButton = new QPushButton(tr("停止")); hlayout2->addWidget(startGrabbingPushButton); hlayout2->addWidget(stopGrabbingPushButton); QGridLayout *vlayout = new QGridLayout; vlayout->addLayout(hlayout1, 0, 0); vlayout->addLayout(hlayout2, 1, 0); QWidget *widget = new QWidget(); this->setCentralWidget(widget); centralWidget()->setLayout(vlayout); } void tabWidget::runPushButtonSlot() { QMessageBox::information(this, "提示：", "提示-------"); startGrabbingPushButton->setStyleSheet("background-color: rgb(255, 100, 100);"); }

效果如图：在这里插入图片描述

添加子窗口

解决方案资源管理器–>右键工程–>选择添加Qt GUI Class:

在这里插入图片描述创建一个名为LoginDlg的Qt GUI 类：然后，在LoginDlg.ui上绘制两个按钮控件，分别命名为：loginPushButton、cancelPushButton，如图：

LoginDlg头文件：

LoginDlg.h:

#pragma once #include #include "ui_LoginDlg.h" class LoginDlg : public QWidget { Q_OBJECT public: LoginDlg(QWidget *parent = Q_NULLPTR); ~LoginDlg(); private: Ui::LoginDlg ui; private slots: void loginPushButtonSlot(); signals: void getSoftwareMode(QString sMode); }; LoginDlg源文件：

LoginDlg.cpp:

#include "LoginDlg.h" LoginDlg::LoginDlg(QWidget *parent) : QWidget(parent) { ui.setupUi(this); // QObject::connect(ui.loginPushButton, SIGNAL(clicked()), this, SLOT(loginPushButtonSlot())); } LoginDlg::~LoginDlg() { } void LoginDlg::loginPushButtonSlot() { emit getSoftwareMode("UserMode"); this->close(); } tabWidget头文件改为：

tabWidget.h:

#pragma once #include #include #include #include #include #include #include #include "ui_tabWidget.h" #include "LoginDlg.h" #pragma execution_character_set("utf-8") class tabWidget : public QMainWindow { Q_OBJECT public: tabWidget(QWidget *parent = Q_NULLPTR); private: Ui::tabWidgetClass ui; QPushButton *startGrabbingPushButton; QPushButton *stopGrabbingPushButton; LoginDlg *loginDlg; private slots: void runPushButtonSlot(); void setSoftwareModeSlot(QString sMode); }; tabWidget源文件改为：

tabWidget.cpp:

#include "tabWidget.h" tabWidget::tabWidget(QWidget *parent) : QMainWindow(parent) { ui.setupUi(this); QHBoxLayout *hlayout1 = new QHBoxLayout; QRadioButton *continusModeRadioButton = new QRadioButton(tr("连续")); QRadioButton *triggerModeRadioButton = new QRadioButton(tr("触发")); hlayout1->addWidget(continusModeRadioButton); hlayout1->addWidget(triggerModeRadioButton); QHBoxLayout *hlayout2 = new QHBoxLayout; startGrabbingPushButton = new QPushButton(tr("开始")); startGrabbingPushButton->setStyleSheet("background-color: rgb(0, 255, 127);"); QObject::connect(startGrabbingPushButton, SIGNAL(clicked()), this, SLOT(runPushButtonSlot())); stopGrabbingPushButton = new QPushButton(tr("停止")); hlayout2->addWidget(startGrabbingPushButton); hlayout2->addWidget(stopGrabbingPushButton); QGridLayout *vlayout = new QGridLayout; vlayout->addLayout(hlayout1, 0, 0); vlayout->addLayout(hlayout2, 1, 0); QWidget *widget = new QWidget(); this->setCentralWidget(widget); centralWidget()->setLayout(vlayout); } void tabWidget::runPushButtonSlot() { Qt::WindowFlags flags = Qt::Dialog; loginDlg = new LoginDlg(this); loginDlg->setWindowFlags(flags); connect(loginDlg, SIGNAL(getSoftwareMode(QString)), this, SLOT(setSoftwareModeSlot(QString))); loginDlg->setWindowTitle("登录"); loginDlg->setWindowModality(Qt::ApplicationModal); loginDlg->show(); } void tabWidget::setSoftwareModeSlot(QString sMode) { if (sMode == "UserMode") { startGrabbingPushButton->setStyleSheet("background-color: rgb(255, 100, 100);"); QMessageBox::information(this, "提示：", "登录成功！"); } }

在这里插入图片描述

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QT界面：子窗口与父窗口交互

QT界面：子窗口与父窗口交互

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