📄 qfocusevent.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/src/kernel/qevent.cpp:1081 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>QFocusEvent Class</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>QFocusEvent Class Reference</h1><p>The QFocusEvent class contains event parameters for widget focusevents.<a href="#details">More...</a><p><tt>#include <<a href="qevent-h.html">qevent.h</a>></tt><p>Inherits <a href="qevent.html">QEvent</a>.<p><a href="qfocusevent-members.html">List of all member functions.</a><h2>Public Members</h2><ul><li><div class=fn><a href="#QFocusEvent"><b>QFocusEvent</b></a> ( Type type )</div></li><li><div class=fn>bool <a href="#gotFocus"><b>gotFocus</b></a> () const</div></li><li><div class=fn>bool <a href="#lostFocus"><b>lostFocus</b></a> () const</div></li><li><div class=fn>enum <a href="#Reason-enum"><b>Reason</b></a> { Mouse, Tab, Backtab, ActiveWindow, Popup, Shortcut, Other }</div></li></ul><h2>Static Public Members</h2><ul><li><div class=fn>Reason <a href="#reason"><b>reason</b></a> ()</div></li><li><div class=fn>void <a href="#setReason"><b>setReason</b></a> ( Reason reason )</div></li><li><div class=fn>void <a href="#resetReason"><b>resetReason</b></a> ()</div></li></ul><hr><a name="details"></a><h2>Detailed Description</h2>The QFocusEvent class contains event parameters for widget focusevents.<p> <p> Focus events are sent to widgets when the keyboard input focuschanges. Focus events occur due to mouse actions, keypresses (e.g.Tab or Backtab), the window system, popup menus, keyboardshortcuts or other application specific reasons. The reason for aparticular focus event is returned by <a href="#reason">reason</a>() in the appropriateevent handler.<p> The event handlers <a href="qwidget.html#focusInEvent">QWidget::focusInEvent</a>() and<a href="qwidget.html#focusOutEvent">QWidget::focusOutEvent</a>() receive focus events.<p> Use <a href="#setReason">setReason</a>() to set the reason for all focus events, and<a href="#resetReason">resetReason</a>() to set the reason for all focus events to the reasonin force before the last setReason() call.<p> <p>See also <a href="qwidget.html#setFocus">QWidget::setFocus</a>(), <a href="qwidget.html#focusPolicy-prop">QWidget::focusPolicy</a> and <a href="events.html">Event Classes</a>.<hr><h2>Member Type Documentation</h2><h3 class=fn><a name="Reason-enum"></a>QFocusEvent::Reason</h3><p> This enum specifies why the focus changed.<ul><li><tt>QFocusEvent::Mouse</tt> - because of a mouse action.<li><tt>QFocusEvent::Tab</tt> - because of a Tab press.<li><tt>QFocusEvent::Backtab</tt> - because of a Backtab press(possibly including Shift/Control, e.g. Shift+Tab).<li><tt>QFocusEvent::ActiveWindow</tt> - because the window system made this window (in)active.<li><tt>QFocusEvent::Popup</tt> - because the application opened/closed a popup that grabbed/released focus.<li><tt>QFocusEvent::Shortcut</tt> - because of a keyboard shortcut.<li><tt>QFocusEvent::Other</tt> - any other reason, usually application-specific.</ul><p> See the <a href="focus.html">keyboard focus overview</a> for moreabout focus.<hr><h2>Member Function Documentation</h2><h3 class=fn><a name="QFocusEvent"></a>QFocusEvent::QFocusEvent ( <a href="qevent.html#Type-enum">Type</a> type )</h3><p> Constructs a focus event object.<p> The <em>type</em> parameter must be either <a href="qevent.html#Type-enum">QEvent::FocusIn</a> or <a href="qevent.html#Type-enum">QEvent::FocusOut</a>.<h3 class=fn>bool <a name="gotFocus"></a>QFocusEvent::gotFocus () const</h3><p> Returns TRUE if the widget received the text input focus;otherwise returns FALSE.<h3 class=fn>bool <a name="lostFocus"></a>QFocusEvent::lostFocus () const</h3><p> Returns TRUE if the widget lost the text input focus; otherwisereturns FALSE.<h3 class=fn><a href="qfocusevent.html#Reason-enum">Reason</a> <a name="reason"></a>QFocusEvent::reason ()<tt> [static]</tt></h3>Returns the reason for this focus event.<p> <p>See also <a href="#setReason">setReason</a>().<h3 class=fn>void <a name="resetReason"></a>QFocusEvent::resetReason ()<tt> [static]</tt></h3>Resets the reason for all future focus events to the value beforethe last <a href="#setReason">setReason</a>() call.<p> <p>See also <a href="#reason">reason</a>() and <a href="#setReason">setReason</a>().<h3 class=fn>void <a name="setReason"></a>QFocusEvent::setReason ( <a href="qfocusevent.html#Reason-enum">Reason</a> reason )<tt> [static]</tt></h3>Sets the reason for all future focus events to <em>reason</em>.<p> <p>See also <a href="#reason">reason</a>() and <a href="#resetReason">resetReason</a>().<!-- eof --><hr><p>This file is part of the <a href="index.html">Qt toolkit</a>.Copyright © 1995-2002<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<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
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -