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Qt widgets

news 来源：原创 2024/4/27 16:55:19

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