t12-main-cpp.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/doc/tutorial.doc:1709 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>t12/main.cpp Example File</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">Home</font></a> | <a href="classes.html"><font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>t12/main.cpp Example File</h1> <pre>/******************************************************************** Qt tutorial 12******************************************************************/#include <<a href="qapplication-h.html">qapplication.h</a>>#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>#include <<a href="qlcdnumber-h.html">qlcdnumber.h</a>>#include <<a href="qfont-h.html">qfont.h</a>>#include <<a href="qlayout-h.html">qlayout.h</a>>#include "lcdrange.h"#include "cannon.h"class MyWidget: public <a href="qwidget.html">QWidget</a>{public: MyWidget( <a href="qwidget.html">QWidget</a> *parent=0, const char *name=0 );};<a name="f86"></a>MyWidget::MyWidget( <a href="qwidget.html">QWidget</a> *parent, const char *name ) : <a href="qwidget.html">QWidget</a>( parent, name ){ <a href="qpushbutton.html">QPushButton</a> *quit = new <a href="qpushbutton.html">QPushButton</a>( "&Quit", this, "quit" ); quit-><a href="qwidget.html#setFont">setFont</a>( QFont( "Times", 18, QFont::Bold ) ); <a href="qobject.html#connect">connect</a>( quit, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), qApp, SLOT(<a href="qapplication.html#quit">quit</a>()) ); LCDRange *angle = new LCDRange( "ANGLE", this, "angle" ); angle->setRange( 5, 70 ); LCDRange *force = new LCDRange( "FORCE", this, "force" ); force->setRange( 10, 50 ); CannonField *cannonField = new CannonField( this, "cannonField" ); <a href="qobject.html#connect">connect</a>( angle, SIGNAL(valueChanged(int)), cannonField, SLOT(setAngle(int)) ); <a href="qobject.html#connect">connect</a>( cannonField, SIGNAL(angleChanged(int)), angle, SLOT(setValue(int)) ); <a href="qobject.html#connect">connect</a>( force, SIGNAL(valueChanged(int)), cannonField, SLOT(setForce(int)) ); <a href="qobject.html#connect">connect</a>( cannonField, SIGNAL(forceChanged(int)), force, SLOT(setValue(int)) ); <a href="qpushbutton.html">QPushButton</a> *shoot = new <a href="qpushbutton.html">QPushButton</a>( "&Shoot", this, "shoot" ); shoot-><a href="qwidget.html#setFont">setFont</a>( QFont( "Times", 18, QFont::Bold ) ); <a href="qobject.html#connect">connect</a>( shoot, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), cannonField, SLOT(shoot()) ); <a href="qgridlayout.html">QGridLayout</a> *grid = new <a href="qgridlayout.html">QGridLayout</a>( this, 2, 2, 10 ); grid-><a href="qgridlayout.html#addWidget">addWidget</a>( quit, 0, 0 ); grid-><a href="qgridlayout.html#addWidget">addWidget</a>( cannonField, 1, 1 ); grid-><a href="qgridlayout.html#setColStretch">setColStretch</a>( 1, 10 ); <a href="qvboxlayout.html">QVBoxLayout</a> *leftBox = new <a href="qvboxlayout.html">QVBoxLayout</a>; grid-><a href="qgridlayout.html#addLayout">addLayout</a>( leftBox, 1, 0 ); leftBox-><a href="qboxlayout.html#addWidget">addWidget</a>( angle ); leftBox-><a href="qboxlayout.html#addWidget">addWidget</a>( force ); <a href="qhboxlayout.html">QHBoxLayout</a> *topBox = new <a href="qhboxlayout.html">QHBoxLayout</a>; grid-><a href="qgridlayout.html#addLayout">addLayout</a>( topBox, 0, 1 ); topBox-><a href="qboxlayout.html#addWidget">addWidget</a>( shoot ); topBox-><a href="qboxlayout.html#addStretch">addStretch</a>( 1 ); angle->setValue( 60 ); force->setValue( 25 ); angle-><a href="qwidget.html#setFocus">setFocus</a>();}int main( int argc, char **argv ){ QApplication::<a href="qapplication.html#setColorSpec">setColorSpec</a>( QApplication::CustomColor ); <a href="qapplication.html">QApplication</a> a( argc, argv ); MyWidget w; w.<a href="qwidget.html#setGeometry">setGeometry</a>( 100, 100, 500, 355 ); a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &w ); w.<a href="qwidget.html#show">show</a>(); return a.<a href="qapplication.html#exec">exec</a>();}</pre><!-- eof --><p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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