Qt中的MDI多对话框程序框架

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//全部基于MainWindow

//---------------------------------------------------------------------- 1

#include <QMainWindow>
#include <QMdiArea>

class MainWindow : public QMainWindow
{
private:
Ui::MainWindow *ui;
QMdiArea *m_mdiArea;
QMdiSubWindow *subWin;

};

//---------------------------------------------------------------------------- 2

void MainWindow::CreateMdiArea()
{
//设定MDI
m_mdiArea = new QMdiArea;
this->setCentralWidget(m_mdiArea);

//设置启动窗口
Dialog333 *label = new Dialog333();
subWin = new QMdiSubWindow;
subWin->setWidget(label);
subWin->setAttribute(Qt::WA_DeleteOnClose);
m_mdiArea->addSubWindow(subWin);
subWin->setWindowFlags(Qt::FramelessWindowHint);
subWin->setStyleSheet("QPushButton {background: white;border: 1px solid rgb(41, 57, 85);border-radius: 3px; font-weight: bold; QPushButton:hover { background: lightgray;}");
subWin->setStyleSheet("QLabel #Title{color:blue;}");

subWin->resize(QSize(1200,800));
subWin->show();
}

//--------------------------------------------------------------------- 3

void MainWindow::open()

    //设置启动窗口

    m_mdiArea->closeAllSubWindows();

    Dialog222 *label = new Dialog222();

    subWin = new QMdiSubWindow;

    subWin->setWidget(label);

    subWin->setAttribute(Qt::WA_DeleteOnClose);

    m_mdiArea->addSubWindow(subWin);

    subWin->setWindowFlags(Qt::FramelessWindowHint);

    subWin->setStyleSheet("QPushButton {background: white;border: 1px solid rgb(41, 57, 85);border-radius: 3px; font-weight: bold; QPushButton:hover { background: lightgray;}");

    subWin->resize(QSize(1200,800));

    subWin->show();

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