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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>TEvent struct Reference</title>
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<hr><h1>TEvent Struct Reference</h1>Information about events.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="system_8h-source.html">system.h</a>></code>
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<a href="structTEvent-members.html">List of all members.</a><table border=0 cellpadding=0 cellspacing=0>
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<tr><td colspan=2><br><h2>Public Attributes</h2></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="ttypes_8h.html#a0">ushort</a> </td><td valign=bottom><a class="el" href="structTEvent.html#m0">what</a></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="structMouseEventType.html">MouseEventType</a> </td><td valign=bottom><a class="el" href="structTEvent.html#m1">mouse</a></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="structKeyDownEvent.html">KeyDownEvent</a> </td><td valign=bottom><a class="el" href="structTEvent.html#m2">keyDown</a></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="structMessageEvent.html">MessageEvent</a> </td><td valign=bottom><a class="el" href="structTEvent.html#m3">message</a></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
TEvent holds a union of objects of type:
<p>
<a class="el" href="structKeyDownEvent.html">KeyDownEvent</a> <a class="el" href="structMessageEvent.html">MessageEvent</a> <a class="el" href="structMouseEventType.html">MouseEventType</a>
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keyed by the what field. The <a class="el" href="classTView.html#a41">TView::handleEvent()</a> member functions and its derived classes take a TEvent object as argument and respond with the appropriate action.
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Definition at line <a class="el" href="system_8h-source.html#l00349">349</a> of file <a class="el" href="system_8h-source.html">system.h</a>.<hr><h2>Member Data Documentation</h2>
<a name="m2" doxytag="TEvent::keyDown"></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="structKeyDownEvent.html">KeyDownEvent</a> TEvent::keyDown
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Undocumented.
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Definition at line <a class="el" href="system_8h-source.html#l00401">401</a> of file <a class="el" href="system_8h-source.html">system.h</a>. </td>
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<a name="m3" doxytag="TEvent::message"></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="structMessageEvent.html">MessageEvent</a> TEvent::message
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Undocumented.
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Definition at line <a class="el" href="system_8h-source.html#l00405">405</a> of file <a class="el" href="system_8h-source.html">system.h</a>. </td>
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<a name="m1" doxytag="TEvent::mouse"></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="structMouseEventType.html">MouseEventType</a> TEvent::mouse
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Undocumented.
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Definition at line <a class="el" href="system_8h-source.html#l00397">397</a> of file <a class="el" href="system_8h-source.html">system.h</a>. </td>
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<a name="m0" doxytag="TEvent::what"></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="ttypes_8h.html#a0">ushort</a> TEvent::what
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This field reports the event's type. Some mnemonics are defined to indicate types of events to TVision event handlers. The following evXXXX constants are used in several places: in the what data member of an TEvent structure, in the <a class="el" href="classTView.html#m3">TView::eventMask</a> data member of a view object, and in the <a class="el" href="views_8h.html#a107">positionalEvents</a> and <a class="el" href="views_8h.html#a108">focusedEvents</a> variables.
<p>
The following event values designate standard event types:
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<pre>
Constant Value Meaning
<a class="el" href="system_8h.html#a0">evMouseDown</a> 0x0001 Mouse button pressed
<a class="el" href="system_8h.html#a1">evMouseUp</a> 0x0002 Mouse button released
<a class="el" href="system_8h.html#a2">evMouseMove</a> 0x0004 Mouse changed location
<a class="el" href="system_8h.html#a3">evMouseAuto</a> 0x0008 Periodic event while mouse button held down
<a class="el" href="system_8h.html#a4">evKeyDown</a> 0x0010 Key pressed
<a class="el" href="system_8h.html#a5">evCommand</a> 0x0100 Command event
<a class="el" href="system_8h.html#a6">evBroadcast</a> 0x0200 Broadcast event
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<p>
The following constants can be used to mask types of events:
<p>
<pre>
Constant Value Meaning
<a class="el" href="system_8h.html#a7">evNothing</a> 0x0000 Event already handled
<a class="el" href="system_8h.html#a8">evMouse</a> 0x000F Mouse event
<a class="el" href="system_8h.html#a9">evKeyboard</a> 0x0010 Keyboard event
<a class="el" href="system_8h.html#a10">evMessage</a> 0xFF00 Message (command, broadcast, or user-defined) event
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<p>
The above standard event masks can be used to determine whether an event belongs to a particular "family" of events. For example:
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<pre>
if ((event.what & <a class="el" href="system_8h.html#a8">evMouse</a>) != 0) doMouseEvent();
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Definition at line <a class="el" href="system_8h-source.html#l00391">391</a> of file <a class="el" href="system_8h-source.html">system.h</a>. </td>
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<hr>The documentation for this struct was generated from the following file:<ul>
<li><a class="el" href="system_8h-source.html">system.h</a></ul>
<hr><address style="align: right;"><small>Generated on Wed Apr 2 22:13:13 2003 for TVision by
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