其实qt应用在安防领域还是蛮多的，尤其是视频监控系统，但是网上几乎没有看到qt做的最基础的视频监控画面分割的demo，今天特意花几分钟提取出来，开源放出来。欢迎大家多多点赞！源码下载：点击打开链接

完整代码：

#ifndef FRMMAIN_H
#define FRMMAIN_H#include <QtGui>
#if (QT_VERSION > QT_VERSION_CHECK(5,0,0))
#include <QtWidgets>
#endifnamespace Ui
{
class frmMain;
}class frmMain : public QWidget
{Q_OBJECTpublic:explicit frmMain(QWidget *parent = 0);~frmMain();protected:bool eventFilter(QObject *watched, QEvent *event);private:Ui::frmMain *ui;bool videoMax;int videoCount;QString videoType;QMenu *videoMenu;QList<QLabel *> widgets;private slots:void initForm();void initMenu();private slots:void play_video_all();void snapshot_video_one();void snapshot_video_all();void show_video_all();void show_video_4();void show_video_6();void show_video_8();void show_video_9();void show_video_16();void hide_video_all();void change_video(int index, int flag);void change_video_4(int index);void change_video_6(int index);void change_video_8(int index);void change_video_9(int index);void change_video_16(int index);
};#endif // FRMMAIN_H

#include "frmmain.h"
#include "ui_frmmain.h"#pragma execution_character_set("utf-8")frmMain::frmMain(QWidget *parent) :QWidget(parent),ui(new Ui::frmMain)
{ui->setupUi(this);this->initForm();this->initMenu();this->show_video_all();QTimer::singleShot(1000, this, SLOT(play_video_all()));
}frmMain::~frmMain()
{delete ui;
}bool frmMain::eventFilter(QObject *watched, QEvent *event)
{if (event->type() == QEvent::MouseButtonDblClick) {QLabel *widget = (QLabel *) watched;if (!videoMax) {videoMax = true;hide_video_all();ui->gridLayout->addWidget(widget, 0, 0);widget->setVisible(true);} else {videoMax = false;show_video_all();}} else if (event->type() == QEvent::MouseButtonPress) {if (qApp->mouseButtons() == Qt::RightButton) {videoMenu->exec(QCursor::pos());}}return QWidget::eventFilter(watched, event);
}void frmMain::initForm()
{//设置样式表QStringList qss;qss.append("QFrame{border:2px solid #000000;}");qss.append("QLabel{font:75 25px;color:#F0F0F0;border:2px solid #AAAAAA;background:#000000;}");qss.append("QLabel:focus{border:2px solid #00BB9E;background:#555555;}");ui->frame->setStyleSheet(qss.join(""));videoMax = false;videoCount = 16;videoType = "1_16";for (int i = 0; i < videoCount; i++) {QLabel *widget = new QLabel;widget->setObjectName(QString("video%1").arg(i + 1));widget->installEventFilter(this);widget->setFocusPolicy(Qt::StrongFocus);widget->setAlignment(Qt::AlignCenter);//二选一可以选择显示文字,也可以选择显示背景图片//widget->setText(QString("通道 %1").arg(i + 1));widget->setPixmap(QPixmap(":/bg_novideo.png"));widgets.append(widget);}
}void frmMain::initMenu()
{videoMenu = new QMenu(this);videoMenu->addAction("截图当前视频", this, SLOT(snapshot_video_one()));videoMenu->addAction("截图所有视频", this, SLOT(snapshot_video_all()));videoMenu->addSeparator();QMenu *menu4 = videoMenu->addMenu("切换到4画面");menu4->addAction("通道1-通道4", this, SLOT(show_video_4()));menu4->addAction("通道5-通道8", this, SLOT(show_video_4()));menu4->addAction("通道9-通道12", this, SLOT(show_video_4()));menu4->addAction("通道13-通道16", this, SLOT(show_video_4()));QMenu *menu6 = videoMenu->addMenu("切换到6画面");menu6->addAction("通道1-通道6", this, SLOT(show_video_6()));menu6->addAction("通道6-通道11", this, SLOT(show_video_6()));menu6->addAction("通道11-通道16", this, SLOT(show_video_6()));QMenu *menu8 = videoMenu->addMenu("切换到8画面");menu8->addAction("通道1-通道8", this, SLOT(show_video_8()));menu8->addAction("通道9-通道16", this, SLOT(show_video_8()));QMenu *menu9 = videoMenu->addMenu("切换到9画面");menu9->addAction("通道1-通道9", this, SLOT(show_video_9()));menu9->addAction("通道8-通道16", this, SLOT(show_video_9()));videoMenu->addAction("切换到16画面", this, SLOT(show_video_16()));
}void frmMain::play_video_all()
{}void frmMain::snapshot_video_one()
{}void frmMain::snapshot_video_all()
{}void frmMain::show_video_all()
{if (videoType == "1_4") {change_video_4(0);} else if (videoType == "5_8") {change_video_4(4);} else if (videoType == "9_12") {change_video_4(8);} else if (videoType == "13_16") {change_video_4(12);} else if (videoType == "1_6") {change_video_6(0);} else if (videoType == "6_11") {change_video_6(5);} else if (videoType == "11_16") {change_video_6(10);} else if (videoType == "1_8") {change_video_8(0);} else if (videoType == "9_16") {change_video_8(8);} else if (videoType == "1_9") {change_video_9(0);} else if (videoType == "8_16") {change_video_9(7);} else if (videoType == "1_16") {change_video_16(0);}
}void frmMain::show_video_4()
{videoMax = false;QString videoType;int index = 0;QAction *action = (QAction *)sender();QString name = action->text();if (name == "通道1-通道4") {index = 0;videoType = "1_4";} else if (name == "通道5-通道8") {index = 4;videoType = "5_8";} else if (name == "通道9-通道12") {index = 8;videoType = "9_12";} else if (name == "通道13-通道16") {index = 12;videoType = "13_16";}if (this->videoType != videoType) {this->videoType = videoType;change_video_4(index);}
}void frmMain::show_video_6()
{videoMax = false;QString videoType;int index = 0;QAction *action = (QAction *)sender();QString name = action->text();if (name == "通道1-通道6") {index = 0;videoType = "1_6";} else if (name == "通道6-通道11") {index = 5;videoType = "6_11";} else if (name == "通道11-通道16") {index = 10;videoType = "11_16";}if (this->videoType != videoType) {this->videoType = videoType;change_video_6(index);}
}void frmMain::show_video_8()
{videoMax = false;QString videoType;int index = 0;QAction *action = (QAction *)sender();QString name = action->text();if (name == "通道1-通道8") {index = 0;videoType = "1_8";} else if (name == "通道9-通道16") {index = 8;videoType = "9_16";}if (this->videoType != videoType) {this->videoType = videoType;change_video_8(index);}
}void frmMain::show_video_9()
{videoMax = false;QString videoType;int index = 0;QAction *action = (QAction *)sender();QString name = action->text();if (name == "通道1-通道9") {index = 0;videoType = "1_9";} else if (name == "通道8-通道16") {index = 7;videoType = "8_16";}if (this->videoType != videoType) {this->videoType = videoType;change_video_9(index);}
}void frmMain::show_video_16()
{videoMax = false;QString videoType;int index = 0;videoType = "1_16";if (this->videoType != videoType) {this->videoType = videoType;change_video_16(index);}
}void frmMain::hide_video_all()
{for (int i = 0; i < videoCount; i++) {ui->gridLayout->removeWidget(widgets.at(i));widgets.at(i)->setVisible(false);}
}void frmMain::change_video(int index, int flag)
{int count = 0;int row = 0;int column = 0;for (int i = 0; i < videoCount; i++) {if (i >= index) {ui->gridLayout->addWidget(widgets.at(i), row, column);widgets.at(i)->setVisible(true);count++;column++;if (column == flag) {row++;column = 0;}}if (count == (flag * flag)) {break;}}
}void frmMain::change_video_4(int index)
{hide_video_all();change_video(index, 2);
}void frmMain::change_video_6(int index)
{hide_video_all();if (index == 0) {ui->gridLayout->addWidget(widgets.at(0), 0, 0, 2, 2);ui->gridLayout->addWidget(widgets.at(1), 0, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(2), 1, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(3), 2, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(4), 2, 1, 1, 1);ui->gridLayout->addWidget(widgets.at(5), 2, 0, 1, 1);for (int i = 0; i < 6; i++) {widgets.at(i)->setVisible(true);}} else if (index == 5) {ui->gridLayout->addWidget(widgets.at(5), 0, 0, 2, 2);ui->gridLayout->addWidget(widgets.at(6), 0, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(7), 1, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(8), 2, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(9), 2, 1, 1, 1);ui->gridLayout->addWidget(widgets.at(10), 2, 0, 1, 1);for (int i = 5; i < 11; i++) {widgets.at(i)->setVisible(true);}} else if (index == 10) {ui->gridLayout->addWidget(widgets.at(10), 0, 0, 2, 2);ui->gridLayout->addWidget(widgets.at(11), 0, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(12), 1, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(13), 2, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(14), 2, 1, 1, 1);ui->gridLayout->addWidget(widgets.at(15), 2, 0, 1, 1);for (int i = 10; i < 16; i++) {widgets.at(i)->setVisible(true);}}
}void frmMain::change_video_8(int index)
{hide_video_all();if (index == 0) {ui->gridLayout->addWidget(widgets.at(0), 0, 0, 3, 3);ui->gridLayout->addWidget(widgets.at(1), 0, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(2), 1, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(3), 2, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(4), 3, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(5), 3, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(6), 3, 1, 1, 1);ui->gridLayout->addWidget(widgets.at(7), 3, 0, 1, 1);for (int i = 0; i < 8; i++) {widgets.at(i)->setVisible(true);}} else if (index == 8) {ui->gridLayout->addWidget(widgets.at(8), 0, 0, 3, 3);ui->gridLayout->addWidget(widgets.at(9), 0, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(10), 1, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(11), 2, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(12), 3, 3, 1, 1);ui->gridLayout->addWidget(widgets.at(13), 3, 2, 1, 1);ui->gridLayout->addWidget(widgets.at(14), 3, 1, 1, 1);ui->gridLayout->addWidget(widgets.at(15), 3, 0, 1, 1);for (int i = 8; i < 16; i++) {widgets.at(i)->setVisible(true);}}
}void frmMain::change_video_9(int index)
{hide_video_all();change_video(index, 3);
}void frmMain::change_video_16(int index)
{hide_video_all();change_video(index, 4);
}