Qt Widgets——子区域和子窗口

2022-03-14 13:33:20

QMdiArea 一般使用于主窗口QMainWindow，用于容纳多个子窗口QMdiSubWindow

qt creator 3.0的设计师有MdiArea可直接拖入使用。

界面如下,图中灰色框即是个MdiArea，另一图中创建了2个QMdiSubWindow ：

代码如下：

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QSize>

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    connect(ui->actionNew,SIGNAL(triggered()),this,SLOT(creatNewWin()));//actionNew是通过设计师创建的动作  

}  

void MainWindow::creatNewWin()

{

    mdiWin1=new QMdiSubWindow;

    mdiWin1->setWindowTitle("未定");

    ui->mdiArea->addSubWindow(mdiWin1);

    mdiWin1->resize(QSize(,));

    mdiWin1->show();

}

MainWindow::~MainWindow()

{

    delete ui;

}

______________________________________________________________________________________________

QMdiArea

公有函数如下：

    QMdiArea(QWidget * parent = )

    ~QMdiArea()  

QMdiSubWindow * addSubWindow(QWidget * widget, Qt::WindowFlags windowFlags = )

void    removeSubWindow(QWidget * widget)

void    setActivationOrder(WindowOrder order)//设置激活顺序，默认以创建先后激活，槽函数中有调用，枚举值见1

void    setBackground(const QBrush & background)//设置背景，默认灰色

void    setDocumentMode(bool enabled)

void    setOption(AreaOption option, bool on = true)//现只有一个选项，即创建子窗口，窗口不充满这个区域，默认是充满的，枚举值见2

void    setViewMode(ViewMode mode)//设置视口模式，默认area中很多小窗口，也可以是有tabBar形式的，以下这些设置tab的函数，都需要先开启这个。枚举值见3

void    setTabPosition(QTabWidget::TabPosition position)//设置tabBar的方位，有东西南北四方位，遵循地理的上北下南左西右东枚举值见4

void    setTabShape(QTabWidget::TabShape shape)//设置tab的形状，默认长方形，也可以像谷歌浏览器那样，梯形，枚举值见5

void    setTabsClosable(bool closable)//默认否，设为true时，tab上方形成一个关闭小按钮

void    setTabsMovable(bool movable)//设置是否可移动，默认false,可移动时，可拖动tab在tabBar上移动，现在的浏览器大多有这样的功能  

QList<QMdiSubWindow *>    subWindowList(WindowOrder order = CreationOrder) const

QMdiSubWindow * currentSubWindow() const

WindowOrder activationOrder() const

QBrush  background() const

bool    documentMode() const

bool    testOption(AreaOption option) const

QMdiSubWindow * activeSubWindow() const

QTabWidget::TabPosition tabPosition() const

QTabWidget::TabShape    tabShape() const

bool    tabsClosable() const

bool    tabsMovable() const

ViewMode    viewMode() const

Public Slots

void    activateNextSubWindow()

void    activatePreviousSubWindow()

void    cascadeSubWindows()

void    closeActiveSubWindow()

void    closeAllSubWindows()

void    setActiveSubWindow(QMdiSubWindow * window)

void    tileSubWindows()//将所有子窗口在area的可视部分排列整齐

Signals

void    subWindowActivated(QMdiSubWindow * window)//切换激活的窗口时发出

1，enum QMdiArea::WindowOrder

Constant	Value	Description
`QMdiArea::CreationOrder`	`0`	按创建时的先后顺序
`QMdiArea::StackingOrder`	`1`	堆叠顺序
`QMdiArea::ActivationHistoryOrder`	`2`	按激活历史前后顺序.

2，enum QMdiArea::AreaOption
flags QMdiArea::AreaOptions

Constant	Value	Description
`QMdiArea::DontMaximizeSubWindowOnActivation`	`0x1`	激活时不使它最大化，默认是最大化的

3，QMdiArea::ViewMode

Constant	Value	Description
`QMdiArea::SubWindowView`	`0`	以小窗口形式显示(default).
`QMdiArea::TabbedView`	`1`	不仅可小窗口，而且形成tabBar

4，enum QTabWidget::TabPosition

Constant	Value	Description
`QTabWidget::North`	`0`	上方显示
`QTabWidget::South`	`1`	下
`QTabWidget::West`	`2`	左
`QTabWidget::East`	`3`	右

5，enum QTabWidget::TabShape

Constant	Value	Description
`QTabWidget::Rounded`	`0`	字面是圆形，但win7上更像长方形，default
`QTabWidget::Triangular`	`1`	字面三角形，说它是梯形更好些

在以上代码中修改，图中是执行tileSubWindows()函数后的结果：

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QSize>

#include <QTabWidget>

#include <QBrush>

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    QBrush b=QBrush(QColor(,,),Qt::FDiagPattern);

    ui->mdiArea->setBackground(b);

    ui->mdiArea->setViewMode(QMdiArea::TabbedView);

    ui->mdiArea->setTabPosition(QTabWidget::North);

    ui->mdiArea->setTabsClosable(true);

    ui->mdiArea->setTabsMovable(true);

    ui->mdiArea->setTabShape(QTabWidget::Triangular);

    ui->mdiArea->setOption(QMdiArea::DontMaximizeSubWindowOnActivation);  

    connect(ui->actionNew,SIGNAL(triggered()),this,SLOT(creatNewWin()));  

}  

void MainWindow::creatNewWin()

{

    mdiWin1=new QMdiSubWindow;

    mdiWin1->setWindowTitle("未定");

    ui->mdiArea->addSubWindow(mdiWin1);

    mdiWin1->resize(QSize(,));

    mdiWin1->show();

}

MainWindow::~MainWindow()

{

    delete ui;

}  

void MainWindow::on_pushButton_clicked()

{

    ui->mdiArea->tileSubWindows();

}

______________________________________________________________________________________________

QMdiSubWindow

函数都比较简单，列出如下：

   QMdiSubWindow(QWidget * parent = , Qt::WindowFlags flags = )

    ~QMdiSubWindow()  

void    setKeyboardPageStep(int step)

void    setKeyboardSingleStep(int step)

void    setOption(SubWindowOption option, bool on = true)//未试效果，求补充，枚举值见1

void    setSystemMenu(QMenu * systemMenu).se.

void    setWidget(QWidget * widget)//主要通过个函数添加它的小部件  

int keyboardPageStep() const

int keyboardSingleStep() const

QMdiArea *  mdiArea() const

QMenu * systemMenu() const

QWidget *   widget() const

bool    testOption(SubWindowOption option) const

bool    isShaded() const

Public Slots

void	showShaded()
void	showSystemMenu()

Signals

void	aboutToActivate()
void	windowStateChanged(Qt::WindowStates oldState, Qt::WindowStates newState)

1，enum QMdiSubWindow::SubWindowOption

Constant	Value	Description
`QMdiSubWindow::RubberBandResize`	`0x4`	If you enable this option, a rubber band control is used to represent the subwindow's outline, and the user resizes this instead of the subwindow itself. As a result, the subwindow maintains its original position and size until the resize operation has been completed, at which time it will receive a single QResizeEvent. By default, this option is disabled.
`QMdiSubWindow::RubberBandMove`	`0x8`	If you enable this option, a rubber band control is used to represent the subwindow's outline, and the user moves this instead of the subwindow itself. As a result, the subwindow remains in its original position until the move operation has completed, at which time aQMoveEvent is sent to the window. By default, this option is disabled.

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