Qt Widgets——工具栏和状态栏

骑猪看日落 2022-02-02 07:25 1454阅读 0赞

工具栏默认位于菜单栏下方，其上添加一个个action按钮，用于执行动作

绝大多谢以前都涉及过，只列出

![复制代码][copycode.gif]

QToolBar(const QString & title, QWidget * parent = 0)  
            QToolBar(QWidget * parent = 0)  
            ~QToolBar()  
      
    void        addAction(QAction * action)  
    QAction *   addAction(const QString & text)  
    QAction *   addAction(const QIcon & icon, const QString & text)  
    QAction *   addAction(const QString & text, const QObject * receiver, const char * member)  
    QAction *   addAction(const QIcon & icon, const QString & text, const QObject * receiver, const char * member)  
    QAction *   addSeparator()  
    QAction *   addWidget(QWidget * widget)  
    void        clear()  
    void    setAllowedAreas(Qt::ToolBarAreas areas)//设置允许停靠区域  
    void    setFloatable(bool floatable)//是否允许拖动成独立窗口，默认是  
    void    setMovable(bool movable)//设置是否可移动位置，默认是  
    void    setOrientation(Qt::Orientation orientation)//设置方向，主窗口为QMainWindow时不能使用，值有Qt::Horizontal和Qt::Vertical  
    QAction *   insertSeparator(QAction * before)  
    QAction *   insertWidget(QAction * before, QWidget * widget)  
      
    bool    isAreaAllowed(Qt::ToolBarArea area) const  
    bool    isFloatable() const  
    bool    isFloating() const  
    bool    isMovable() const  
    Qt::Orientation orientation() const  
    QAction *   toggleViewAction() const  
    Qt::ToolButtonStyle toolButtonStyle() const  
    QWidget *   widgetForAction(QAction * action) const  
    QAction *   actionAt(const QPoint & p) const  
    QAction *   actionAt(int x, int y) const  
    Qt::ToolBarAreas    allowedAreas() const  
    QSize       iconSize() const

![复制代码][copycode.gif]

Public Slots

Signals

<table style="border:1px solid #C0C0C0;border-collapse:collapse;"> 
 <tbody> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#actionTriggered" style="color:rgb(120,175,211);" rel="nofollow">actionTriggered</a>(QAction *&nbsp;action)</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#allowedAreas-prop" style="color:rgb(120,175,211);" rel="nofollow">allowedAreasChanged</a>(Qt::ToolBarAreas&nbsp;allowedAreas)</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#iconSize-prop" style="color:rgb(120,175,211);" rel="nofollow">iconSizeChanged</a>(const QSize &amp;&nbsp;iconSize)</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#movable-prop" style="color:rgb(120,175,211);" rel="nofollow">movableChanged</a>(bool&nbsp;movable)</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#orientation-prop" style="color:rgb(120,175,211);" rel="nofollow">orientationChanged</a>(Qt::Orientation&nbsp;orientation)</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#toolButtonStyle-prop" style="color:rgb(120,175,211);" rel="nofollow">toolButtonStyleChanged</a>(Qt::ToolButtonStyle&nbsp;toolButtonStyle)</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#topLevelChanged" style="color:rgb(120,175,211);" rel="nofollow">topLevelChanged</a>(bool&nbsp;topLevel)//当它的float属性改变时，信号发送，</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">void</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qtoolbar.html#visibilityChanged" style="color:rgb(120,175,211);" rel="nofollow">visibilityChanged</a>(bool&nbsp;visible)//可见性</td> 
  </tr> 
 </tbody> 
</table>

————————————————————————————————————————————————————————

[QStatusBar][]

状态栏，位于窗口的最下方，用于显示文本，提示用户当前的操作

![复制代码][copycode.gif]

QStatusBar(QWidget * parent = 0)  
    virtual ~QStatusBar()  
    void    addPermanentWidget(QWidget * widget, int stretch = 0)//添加永久性部件，永久意味着它不能被临时消息（showMessage函数）掩盖，位于最右端，stretch伸缩性为0  
      
    表示给小部件最小的空间  
    void    addWidget(QWidget * widget, int stretch = 0)//位于最左端，当调用showMessage函数时，消息文字将与此函数添加的部件上文字重合  
    QString currentMessage() const  
    int insertPermanentWidget(int index, QWidget * widget, int stretch = 0)  
    int insertWidget(int index, QWidget * widget, int stretch = 0)  
    bool    isSizeGripEnabled() const  
    void    removeWidget(QWidget * widget)  
    void    setSizeGripEnabled(bool)//SizeGrip为尺寸夹具，状态栏的最右下角斜线即是，用于拖动改变窗口尺寸

![复制代码][copycode.gif]

Public Slots

Signals

——————————————————————————————————————————————————————————————

[QSizeGrip][]

尺寸夹具，用于改变窗口大小

Public Functions

<table style="border:1px solid #C0C0C0;border-collapse:collapse;"> 
 <tbody> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">&nbsp;</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qsizegrip.html#QSizeGrip" style="color:rgb(120,175,211);" rel="nofollow">QSizeGrip</a>(QWidget *&nbsp;parent)</td> 
  </tr> 
  <tr> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;">&nbsp;</td> 
   <td style="font-size:12px;border:1px solid #C0C0C0;border-collapse:collapse;"> <a href="http://qt-project.org/doc/qt-5/qsizegrip.html#dtor.QSizeGrip" style="color:rgb(120,175,211);" rel="nofollow">~QSizeGrip</a>()</td> 
  </tr> 
 </tbody> 
</table>

Reimplemented Public Functions

——————————————————————————————————————————————————————————————

示例：

![SouthEast][]

pushButton右上角有[QSizeGrip][] ，拖动它可向右上方改变整个MainWindow的大小。

![复制代码][copycode.gif]

#include "mainwindow.h"  
    #include "ui_mainwindow.h"  
    #include <QPushButton>  
    #include <QLabel>  
    #include <QSizeGrip>  
      
    MainWindow::MainWindow(QWidget *parent) :  
        QMainWindow(parent),  
        ui(new Ui::MainWindow)  
    {  
        ui->setupUi(this);  
        QPushButton *btn=new QPushButton("PermanentWidget");  
        QLabel *lbl=new QLabel("Widget");  
        ui->statusBar->addPermanentWidget(btn);  
        ui->statusBar->addWidget(lbl);  
      
        ui->statusBar->showMessage("hello",3000);  
      
        QSizeGrip *grip =new QSizeGrip(ui->pushButton);  
        grip->setVisible(true);//不设置这个见不到它……  
    }  
      
    MainWindow::~MainWindow()  
    {  
        delete ui;  
    }

![复制代码][copycode.gif]

本文转自夜&枫博客园博客，原文链接：http://www.cnblogs.com/newstart/p/4478702.html，如需转载请自行联系原作者

[copycode.gif]: /images/20220202/03947e6e76b646c0a035780eeb07906b.png
[QStatusBar]: http://qt-project.org/doc/qt-5/qstatusbar.html
[QSizeGrip]: http://qt-project.org/doc/qt-5/qsizegrip.html
[SouthEast]: /images/20220202/1af1766f2a134848953306d5ec09129d.png