Qt widgets

1,Qt部件Widgets--CheckWidgets,安置其他部件的Widgets,让用户选择数值的部件

选择部件---使用户能够从预定义的条目菜单中做出选择,combination

QListBox,QComboBox,列表组合框

QListBox列表框部件一般用于使用户从中选择一个或多个条目,条目通常为文本类型,也可以是位图

QComboBox *combobox;

combobox = new QComboBox(false,this);设置组合框是否为读写,部件父对象

2,部件布局--程序中合理安排部件使程序看起来美观,从而更容易使用

部件类

QGroupBox,QButtonGroup,QSplitter,QWidgetStack

3,QGroupBox用于在部件周围绘制一个框架,在框架的上端添加描述信息

g++ -c -pipe -O2 -Wall -W -D_REENTRANT -fPIE -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -I/opt/Qt5.4.1/5.4/gcc_64/include -I/opt/Qt5.4.1/5.4/gcc_64/include/QtWidgets -I/opt/Qt5.4.1/5.4/gcc_64/include/QtGui -I/opt/Qt5.4.1/5.4/gcc_64/include/QtCore -I. -I/opt/Qt5.4.1/5.4/gcc_64/mkspecs/linux-g++ -o box.o box.cpp
box.cpp: In constructor ‘MyMainWindow::MyMainWindow()’:
box.cpp:24:22: error: ‘AlignHCenter’ was not declared in this scope
  label->setAlignment(AlignHCenter | AlignVCenter);
                      ^
box.cpp:24:22: note: suggested alternative:
In file included from /opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qbytearray.h:38:0,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qstring.h:38,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qcoreapplication.h:38,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtWidgets/qapplication.h:37,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtWidgets/QApplication:1,
                 from box.cpp:1:
/opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qnamespace.h:232:9: note:   ‘AlignHCenter’
         AlignHCenter = 0x0004,
         ^
box.cpp:24:37: error: ‘AlignVCenter’ was not declared in this scope
  label->setAlignment(AlignHCenter | AlignVCenter);
                                     ^
box.cpp:24:37: note: suggested alternative:
In file included from /opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qbytearray.h:38:0,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qstring.h:38,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qcoreapplication.h:38,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtWidgets/qapplication.h:37,
                 from /opt/Qt5.4.1/5.4/gcc_64/include/QtWidgets/QApplication:1,
                 from box.cpp:1:
/opt/Qt5.4.1/5.4/gcc_64/include/QtCore/qnamespace.h:239:9: note:   ‘AlignVCenter’
         AlignVCenter = 0x0080,
         ^
make: *** [box.o] Error 1

创建和放置分组框架,QGroupBox::setTitle("");设置分组框的标题

4,QButtonGroup与QGroupBox 相似,有一些布局按钮方面的特殊功能

QButtonGroup对象的最常用的方法是布置单线按钮,在QButtonGroup

setExclusibe()

5,QSplitter()拆分对象使用户能够通过拖动拆分器所提供的部件间的分割线控制子部件的大小