基于Qt的QQ局域网聊天源码

ui->userTableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);//表格只读 //========================================== void Widget::on_closeButton_clicked() { /* 慢慢消失的效果 */ QPropertyAnimation *animation = new QPropertyAnimation(this,"windowOpacity"); animation->setDuration(1000); animation->setStartValue(1); animation->setEndValue(0); animation->start(); connect(animation,SIGNAL(finished()),this,SLOT(close()));//效果显示完后关闭 } //================================================ private: /* 鼠标拖动窗口 */ void mouseMoveEvent(QMouseEvent *event); void mousePressEvent(QMouseEvent *event); /* 记录窗口当前的位置 */ QPoint StartPos; void Widget::mousePressEvent(QMouseEvent *event) { if(event->buttons() == Qt::LeftButton) { //记录窗口此时的坐标 StartPos = event->globalPos() - this->frameGeometry().topLeft(); } } void Widget::mouseMoveEvent(QMouseEvent *event) { QPoint EndPos; if ( event->buttons() == Qt::LeftButton ) { EndPos = event->globalPos() - StartPos; this->move(EndPos); } } //==================================================== /* * set background image */ QPixmap bgImages(":/images/background.jpg"); QPalette bgPalette = this->palette(); bgPalette.setBrush(QPalette::Background,bgImages); this->setPalette(bgPalette); setMask(bgImages.mask());// set background mask attribute same as background's image //================================================== QTableWidget不仅允许把文字加到单元格，还允许把控件也放到单元格中。 比如，把一个下拉框加入单元格，可以这么做： QComboBox *comBox = new QComboBox(); comBox->addItem("Y"); comBox->addItem("N"); tableWidget->setCellWidget(0,2,comBox); //================================= 通过实现 itemClicked (QTableWidgetItem *) 信号的槽函数， 就可以获得鼠标单击到的单元格指针，进而获得其中的文字信息 将itemClicked信号与函数getItem绑定 connect(tableWidget,SIGNAL(itemDoubleClicked(QTreeWidgetItem*,int)),this,SLOT(getItem(QTreeWidgetItem*,int))); //============================================== #include <QItemDelegate>//+++++去掉表格虚框+++++ #include <QStyledItemDelegate> class NoFocusDelegate : public QStyledItemDelegate { protected: void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const; }; void Widget::mouseMoveEvent(QMouseEvent *event) { //去表格虚框 QPoint EndPos; if ( event->buttons() == Qt::LeftButton ) { EndPos = event->globalPos() - StartPos; this->move(EndPos); } } void NoFocusDelegate::paint(QPainter* painter, const QStyleOptionViewItem & option, const QModelIndex &index) const { QStyleOptionViewItem itemOption(option); if (itemOption.state & QStyle::State_HasFocus) itemOption.state = itemOption.state ^ QStyle::State_HasFocus; QStyledItemDelegate::paint(painter, itemOption, index); } 然后调用： ui->userTableWidget->setItemDelegate(new NoFocusDelegate()); //========================================================== QTableWidgetItem *user=new QTableWidgetItem(userName);//表格文字居中显示 QTableWidgetItem *host=new QTableWidgetItem(localHostName); QTableWidgetItem *ip=new QTableWidgetItem(ipAddress); user->setTextAlignment(Qt::AlignCenter); host->setTextAlignment(Qt::AlignCenter); ip->setTextAlignment(Qt::AlignCenter); ui->userTableWidget->setTextElideMode(Qt::ElideRight);//防止文本过长显示右边 ui->userTableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);//表格只读 //============================================================== //===================== 垂直滚动条样式1 ================= ui->messageBrowser->verticalScrollBar()->setStyleSheet( "QScrollBar:vertical{width:8px;background:rgba(0,0,0,0%);margin:0px,0px,0px,0px;padding-top:9px;padding-bottom:9px;}"//留9px给上下箭头 "QScrollBar::handle:vertical{width:8px;background:rgba(0,0,0,25%);border-radius:4px;min-height:20;}"//上下设置为椭圆 "QScrollBar::handle:vertical:hover{width:8px;background:rgba(0,0,0,50%);border-radius:4px;min-height:20;}"//鼠标悬浮颜色变深 "QScrollBar::add-line:vertical{height:9px;width:8px;border-image:url(:/images/bottom.png);subcontrol-position:bottom;}"//下箭头 "QScrollBar::sub-line:vertical{height:9px;width:8px;border-image:url(:/images/top.png);subcontrol-position:top;}"//上箭头 "QScrollBar::add-line:vertical:hover{height:7px;width:6px;border-image:url(:/images/bottom.png);border:1px;subcontrol-position:bottom;}"//鼠标悬浮下箭头 "QScrollBar::sub-line:vertical:hover{height:7px;width:6px;border-image:url(:/images/top.png);border:1px;subcontrol-position:top;}"//鼠标悬浮上箭头 "QScrollBar::add-page:vertical,QScrollBar::sub-page:vertical{background:rgba(0,0,0,10%);border-radius:4px;}");//滚动时部分 //====================== 垂直滚动条样式2 =================== ui->messageTextEdit->verticalScrollBar()->setStyleSheet( "QScrollBar{background:transparent; width: 10px;}" "QScrollBar::handle{background:lightgray; border:2px solid transparent; border-radius:5px;}" "QScrollBar::handle:hover{background:gray;}" "QScrollBar::sub-line{background:transparent;}" "QScrollBar::add-line{background:transparent;}"); //==================================================================== /********** 显示按钮菜单(pushbutton提升为MenuButton大写)********************/ QMenu * menu = ui->menuButton->getmenu(); SettingAct = new QAction(QIcon(":/image/setting.png"), tr("&设置"), this); AboutAct = new QAction(QIcon(":/image/setting.png"), tr("&关于我们"), this); menu->addAction(SettingAct); menu->addAction(AboutAct); --------------------menubutton.h---------------------- #ifndef MENUBUTTON_H #define MENUBUTTON_H #include <QPushButton> class QMenu; class MenuButton : public QPushButton //继承QPushButton类 { Q_OBJECT public: explicit MenuButton(QWidget *parent = 0); QMenu *getmenu(); private slots: void PushMenu(); private: QMenu *menu; }; #endif // MENUBUTTON_H --------------------menupushbutton.cpp-------------- #include "menubutton.h" #include <QMenu> MenuButton::MenuButton(QWidget *parent): QPushButton(parent) { menu = new QMenu(this); connect(this,SIGNAL(clicked()),this,SLOT(PushMenu())); } QMenu *MenuButton::getmenu() { return menu; } void MenuButton::PushMenu() { QPoint pos; int y = pos.y(); pos.setY(y+this->geometry().height()); menu->exec(this->mapToGlobal(pos)); } ----------------widget.h-------------- #include <QMenu> #include <QAction> /* AboutpushButton按钮下的菜单 */ QAction *AboutAct; QAction *SettingAct; //================================================================================ //================== 回车键发消息（只能光标在末尾） ================== if(ui->messageTextEdit->toPlainText().endsWith("\n") && ui->messageTextEdit->toPlainText()!="\n") { sendMessage(Message); } else if(ui->messageTextEdit->toPlainText().endsWith("\n")) { QMessageBox::warning(0,tr("警告"),tr("发送内容不为空"),QMessageBox::Ok); ui->messageTextEdit->clear();//清空TextEdit return; } //========================= 回车键发消息优化 =================== protected: bool eventFilter(QObject *obj, QEvent *event);//+++++++++回车键发消息 bool Widget::eventFilter(QObject *obj, QEvent *event) { if(obj == ui->messageTextEdit) { if (event->type() == QEvent::KeyPress) { QKeyEvent *keyEvent = static_cast <QKeyEvent *>(event); if(keyEvent->key()==Qt::Key_Return) { qDebug()<<"int envent filter"; emit sendMessage(Message); return true