在Qt中编写会议室应用程序通常涉及到用户界面设计、网络通信、音频/视频处理等方面。以下是创建一个基本会议室应用程序的步骤概述：

项目设置：

使用Qt Creator创建一个新的Qt Widgets Application或Qt Quick Application项目。
用户界面设计：

设计主窗口，包含必要的布局和控件，例如视频显示窗口、音频控制、聊天窗口、参与者列表等。
音频/视频处理：

使用QCamera和QCameraViewfinder来访问和显示摄像头视频。
使用QAudioInput和QAudioOutput来处理音频输入和输出。
网络通信：

实现会议室的网络通信功能，可以使用QTcpSocket、QUdpSocket或更高级别的库如QWebSocket。
用户认证和管理：

集成用户登录和认证机制，可能需要使用数据库或远程服务器验证用户。
会议室控制：

实现会议室的控制逻辑，如创建会议室、加入会议室、主持人控制等。
数据同步：

确保所有参与者都能同步更新，如聊天消息、参与者状态等。
错误处理和用户反馈：

添加必要的错误处理和用户操作反馈机制。
测试和优化：

对应用程序进行测试，确保功能正常，优化性能和用户体验。
部署：

准备应用程序的发布，包括编译、打包和分发。

这里只能展示部分代码

#pragma execution_character_set("utf-8")  #include "animationbutton1.h" #include "qpainter.h" #include "qpropertyanimation.h" #include "qdebug.h"  AnimationButton1::AnimationButton1(QWidget *parent) : QWidget(parent) {     enter = true;     leave = false;     pixWidth = 0;     pixHeight = 0;     oldWidth = 0;     oldHeight = 0;      enterAnimation = new QPropertyAnimation(this, "");     enterAnimation->setStartValue(0);     enterAnimation->setEndValue(5);     enterAnimation->setDuration(400);     connect(enterAnimation, SIGNAL(valueChanged(QVariant)), this, SLOT(enterImageChanged(QVariant)));      leaveAnimation = new QPropertyAnimation(this, "");     leaveAnimation->setStartValue(0);     leaveAnimation->setEndValue(5);     leaveAnimation->setDuration(400);     connect(leaveAnimation, SIGNAL(valueChanged(QVariant)), this, SLOT(leaveImageChanged(QVariant))); }  AnimationButton1::~AnimationButton1() {     delete enterAnimation;     delete leaveAnimation; }  void AnimationButton1::enterEvent(QEvent *) {     enter = true;     leave = false;     pixWidth = pixWidth - 25;     pixHeight = pixHeight - 25;     enterAnimation->start(); }  void AnimationButton1::leaveEvent(QEvent *) {     enter = false;     leave = true;     pixWidth = oldWidth;     pixHeight = oldHeight;     leaveAnimation->start(); }  void AnimationButton1::paintEvent(QPaintEvent *) {     if (imageName.isEmpty()) {         return;     }      QPainter painter(this);     painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);      QPixmap pix(imageName);     pix = pix.scaled(targetWidth, targetHeight, Qt::KeepAspectRatio, Qt::SmoothTransformation);      if (enter || leave) {         int pixX = rect().center().x() - targetWidth / 2;         int pixY = rect().center().y() - targetHeight / 2;         QPoint point(pixX, pixY);         painter.drawPixmap(point, pix);     } }  void AnimationButton1::enterImageChanged(QVariant index) {     int i = index.toInt();     targetWidth = pixWidth + i * 5;     targetHeight = pixHeight + i * 5;     update(); }  void AnimationButton1::leaveImageChanged(QVariant index) {     int i = index.toInt();     targetWidth = pixWidth - i * 5;     targetHeight = pixWidth - i * 5;     update(); }  QString AnimationButton1::getImageName() const {     return this->imageName; }  QSize AnimationButton1::sizeHint() const {     return QSize(95, 95); }  QSize AnimationButton1::minimumSizeHint() const {     return QSize(10, 10); }  void AnimationButton1::setImageName(const QString &imageName) {     if (this->imageName != imageName) {         this->imageName = imageName;         QPixmap pix(imageName);         pixWidth = pix.width();         pixHeight = pix.height();         oldWidth = pixWidth;         oldHeight = pixHeight;         targetWidth = pixWidth - 25;         targetHeight = pixHeight - 25;         update();     } }  

 #include "widgetKeyBoard.h" #include  #include  #include  #include  #include  #include  #include    #define ZOOMED_WIDGET_STYLESHEET    "border-radius:8px;font:bold 16px;color:white;"  widgetKeyBoard::widgetKeyBoard(QWidget *parent) :         QWidget(parent), m_parent(parent) {     m_created = false;     keyboardGroup = new QGroupBox(this);     keyboardGroup->setTitle("");     createKeyboard(); }  QKeyPushButton * widgetKeyBoard::createNewKey(QString keyValue) {     QKeyPushButton *tmp = new QKeyPushButton(this);     int width = 0, height = 0;      tmp->setText(keyValue);     width = KEY_WIDTH_EMBEDDED;     height = KEY_HEIGHT_EMBEDDED;      tmp->setObjectName(keyValue);     tmp->setMinimumSize(width, height);     tmp->setMaximumSize(width, height);      tmp->setVisible(true);     return (tmp); }  void widgetKeyBoard::upperLowerSwitch() {     //line 1 is digital. no need to convert to upper case     //iterate vertical layout item     for (int i = 1; i < layout()->count(); ++i) {         QLayoutItem *layoutItem = layout()->itemAt(i);         QLayout *hlayout = layoutItem->layout();         iterate horizon layout item          for (int j = 0; j < hlayout->count(); ++j) {             QLayoutItem *hlayoutItem = hlayout->itemAt(j);             QKeyPushButton *key = (QKeyPushButton *)hlayoutItem->widget();             if (IS_CAPS(key->text()) || IS_DEL(key->text()))                 continue;             if (mIsUpper)                 key->setText(key->text().toLower());             else                 key->setText(key->text().toUpper());         }     }     mIsUpper = !mIsUpper; }  void widgetKeyBoard::resizeEvent(QResizeEvent *event) {     keyboardGroup->resize(this->width(),this->height()); } //create keyboard void widgetKeyBoard::createKeyboard(void) {     QKeyPushButton	*tmp = NULL;     QVBoxLayout     *tmpVLayout = new QVBoxLayout;     QHBoxLayout     *tmpLayout = new QHBoxLayout;      if (m_created == true)         return;     m_created = true;      for (short i = '1'; i <= '9'; i++) {         tmpLayout->addWidget(createNewKey(QChar(i)));     }     tmpLayout->addWidget(createNewKey(tr("0")));     tmpVLayout->insertLayout(0, tmpLayout);      tmpLayout = new QHBoxLayout;     tmpLayout->addWidget(createNewKey(tr("Q")));     tmpLayout->addWidget(createNewKey(tr("W")));     tmpLayout->addWidget(createNewKey(tr("E")));     tmpLayout->addWidget(createNewKey(tr("R")));     tmpLayout->addWidget(createNewKey(tr("T")));     tmpLayout->addWidget(createNewKey(tr("Y")));     tmpLayout->addWidget(createNewKey(tr("U")));     tmpLayout->addWidget(createNewKey(tr("I")));     tmpLayout->addWidget(createNewKey(tr("O")));     tmpLayout->addWidget(createNewKey(tr("P")));     tmpVLayout->insertLayout(1, tmpLayout);      tmpLayout = new QHBoxLayout;     tmpLayout->addWidget(createNewKey(tr("A")));     tmpLayout->addWidget(createNewKey(tr("S")));     tmpLayout->addWidget(createNewKey(tr("D")));     tmpLayout->addWidget(createNewKey(tr("F")));     tmpLayout->addWidget(createNewKey(tr("G")));     tmpLayout->addWidget(createNewKey(tr("H")));     tmpLayout->addWidget(createNewKey(tr("J")));     tmpLayout->addWidget(createNewKey(tr("K")));     tmpLayout->addWidget(createNewKey(tr("L")));     tmpVLayout->insertLayout(2, tmpLayout);      tmpLayout = new QHBoxLayout;     tmp = createNewKey(KEY_CAPS);     tmp->setMaximumWidth(tmp->maximumWidth() * 2 + 5);     tmp->setMinimumWidth(tmp->minimumWidth() * 2 + 5);     tmpLayout->addWidget(tmp);     tmpLayout->addWidget(createNewKey(tr("Z")));     tmpLayout->addWidget(createNewKey(tr("X")));     tmpLayout->addWidget(createNewKey(tr("C")));     tmpLayout->addWidget(createNewKey(tr("V")));     tmpLayout->addWidget(createNewKey(tr("B")));     tmpLayout->addWidget(createNewKey(tr("N")));     tmpLayout->addWidget(createNewKey(tr("M")));     tmp = createNewKey(KEY_DEL);     tmp->setMaximumWidth(tmp->maximumWidth() * 2);     tmp->setMinimumWidth(tmp->minimumWidth() * 2);     tmpLayout->addWidget(tmp);      tmpVLayout->insertLayout(3, tmpLayout);      this->setLayout(tmpVLayout);     this->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); }