Qt widget 鼠标拖拽,分离新窗口

#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); ui->widget1->installEventFilter(this); ui->widget2->installEventFilter(this); ui->widget3->installEventFilter(this); ui->widget4->installEventFilter(this); ui->widget5->installEventFilter(this); ui->widget6->installEventFilter(this); } MainWindow::~MainWindow() { delete ui; } static QPoint lastPoint; static bool isHover = false; static bool isHiden = false; bool MainWindow::eventFilter(QObject *object, QEvent *event) { ObjWidget = NULL; ObjWidget = qobject_cast<QWidget*>(object); //筛选出Widget if(ObjWidget == NULL) { return QMainWindow::eventFilter(object,event); } switch(event->type()) { //鼠标按下事件 case QEvent::MouseButtonPress:{ QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event); if(ObjWidget->rect().contains(mouseEvent->pos()) && (mouseEvent->button() == Qt::LeftButton)) { lastPoint = mouseEvent->pos(); isHover = true; } }break; //鼠标移动 case QEvent::MouseMove:{ if(!isHover) { break; } if(NULL == ObjWidget->parent()) { MovePosWidget(ObjWidget,event); //Widget窗口随鼠标移动 return QMainWindow::eventFilter(ObjWidget,event); } DeleteLayout(ObjWidget); //删除布局 DisplayWidget(ObjWidget,event); //显示窗口 }break; //鼠标释放 case QEvent::MouseButtonRelease:{ if(!isHover) { break; } if(NULL == ObjWidget->parent()) { return QMainWindow::eventFilter(ObjWidget,event); } isHover = false; }break; case QEvent::Close:{ RecoverWidget(ObjWidget); //恢复显示 isHiden = true; }break; case QEvent::Hide:{ if(isHiden) { isHiden = false; }else{ return QMainWindow::eventFilter(ObjWidget,event); } }break; default:break; } return false; } void MainWindow::DisplayWidget(QWidget *widget,QEvent *event) { QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event); if("widget1" == widget->objectName()) { Widget1 = widget; Widget1->setParent(NULL); Widget1->setWindowFlags(Qt::Dialog| Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint); Widget1->setGeometry(mouseEvent->globalX(),mouseEvent->globalY(),300,300); Widget1->show(); Widget1->move(mouseEvent->globalX(),mouseEvent->globalY()); Widget1->setWindowTitle("Widget1"); } if("widget2" == widget->objectName()) { Widget2 = widget; Widget2->setParent(NULL); Widget2->setWindowFlags(Qt::Dialog| Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint); Widget2->setGeometry(mouseEvent->globalX(),mouseEvent->globalY(),300,300); Widget2->show(); Widget2->move(mouseEvent->globalX(),mouseEvent->globalY()); Widget2->setWindowTitle("Widget2"); } if("widget3" == widget->objectName()) { Widget3 = widget; Widget3->setParent(NULL); Widget3->setWindowFlags(Qt::Dialog| Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint); Widget3->setGeometry(mouseEvent->globalX(),mouseEvent->globalY(),300,300); Widget3->show(); Widget3->move(mouseEvent->globalX(),mouseEvent->globalY()); Widget3->setWindowTitle("Widget3"); } if("widget4" == widget->objectName()) { Widget4 = widget; Widget4->setParent(NULL); Widget4->setWindowFlags(Qt::Dialog| Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint); Widget4->setGeometry(mouseEvent->globalX(),mouseEvent->globalY(),300,300); Widget4->show(); Widget4->move(mouseEvent->globalX(),mouseEvent->globalY()); Widget4->setWindowTitle("Widget4"); } if("widget5" == widget->objectName()) { Widget5 = widget; Widget5->setParent(NULL); Widget5->setWindowFlags(Qt::Dialog| Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint); Widget5->setGeometry(mouseEvent->globalX(),mouseEvent->globalY(),300,300); Widget5->show(); Widget5->move(mouseEvent->globalX(),mouseEvent->globalY()); Widget5->setWindowTitle("Widget5"); } if("widget6" == widget->objectName()) { Widget6 = widget; Widget6->setParent(NULL); Widget6->setWindowFlags(Qt::Dialog| Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint); Widget6->setGeometry(mouseEvent->globalX(),mouseEvent->globalY(),300,300); Widget6->show(); Widget6->move(mouseEvent->globalX(),mouseEvent->globalY()); Widget6->setWindowTitle("Widget6"); } } void MainWindow::DeleteLayout(QWidget *widget) { if(("widget1" == widget->objectName()) && (NULL != ui->widget1_back->layout())) { Layout1 = ui->widget1_back->layout(); while(ui->widget1_back->layout()->count() > 0) { QLayoutItem *item = ui->widget1_back->layout()->takeAt(0); delete item; } ui->widget1_back->setMaximumWidth(0); } if(("widget2" == widget->objectName()) && (NULL != ui->widget2_back->layout())) { Layout2 = ui->widget2_back->layout(); while(ui->widget2_back->layout()->count() > 0) { QLayoutItem *item = ui->widget2_back->layout()->takeAt(0); delete item; } ui->widget2_back->setMaximumWidth(0); } if(("widget3" == widget->objectName()) && (NULL != ui->widget3_back->layout())) { Layout3 = ui->widget3_back->layout(); while(ui->widget3_back->layout()->count() > 0) { QLayoutItem *item = ui->widget3_back->layout()->takeAt(0); delete item; } ui->widget3_back->setMaximumWidth(0); } if(("widget4" == widget->objectName()) && (NULL != ui->widget4_back->layout())) { Layout4 = ui->widget4_back->layout(); while(ui->widget4_back->layout()->count() > 0) { QLayoutItem *item = ui->widget4_back->layout()->takeAt(0); delete item; } ui->widget4_back->setMaximumWidth(0); } if(("widget5" == widget->objectName()) && (NULL != ui->widget5_back->layout())) { Layout5 = ui->widget5_back->layout(); while(ui->widget5_back->layout()->count() > 0) { QLayoutItem *item = ui->widget5_back->layout()->takeAt(0); delete item; } ui->widget5_back->setMaximumWidth(0); } if(("widget6" == widget->objectName()) && (NULL != ui->widget6_back->layout())) { Layout6 = ui->widget6_back->layout(); while(ui->widget6_back->layout()->count() > 0) { QLayoutItem *item = ui->widget6_back->layout()->takeAt(0); delete item; } ui->widget6_back->setMaximumWidth(0); } } void MainWindow::RecoverWidget(QWidget *widget) { if("widget1" == widget->objectName()) { Widget1->setParent(ui->widget1_back); Layout1->removeWidget(Widget1); Layout1->addWidget(Widget1); Layout1->setMargin(0); ui->widget1_back->setLayout(Layout1); ui->widget1_back->setMaximumWidth(16777215); }el