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377 lines
22 KiB
377 lines
22 KiB
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQToolTip Class Reference</h1>
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<p>The TQToolTip class provides tool tips (balloon help) for
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any widget or rectangular part of a widget.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qtooltip-h.html">ntqtooltip.h</a>></tt>
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<p>Inherits <a href="ntqt.html">TQt</a>.
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<p><a href="qtooltip-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQToolTip"><b>TQToolTip</b></a> ( TQWidget * widget, TQToolTipGroup * group = 0 )</li>
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<li class=fn>TQWidget * <a href="#parentWidget"><b>parentWidget</b></a> () const</li>
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<li class=fn>TQToolTipGroup * <a href="#group"><b>group</b></a> () const</li>
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</ul>
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<h2>Static Public Members</h2>
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<ul>
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<li class=fn>void <a href="#add"><b>add</b></a> ( TQWidget * widget, const TQString & text )</li>
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<li class=fn>void <a href="#add-2"><b>add</b></a> ( TQWidget * widget, const TQString & text, TQToolTipGroup * group, const TQString & longText )</li>
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<li class=fn>void <a href="#remove"><b>remove</b></a> ( TQWidget * widget )</li>
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<li class=fn>void <a href="#add-3"><b>add</b></a> ( TQWidget * widget, const TQRect & rect, const TQString & text )</li>
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<li class=fn>void <a href="#add-4"><b>add</b></a> ( TQWidget * widget, const TQRect & rect, const TQString & text, TQToolTipGroup * group, const TQString & groupText )</li>
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<li class=fn>void <a href="#remove-2"><b>remove</b></a> ( TQWidget * widget, const TQRect & rect )</li>
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<li class=fn>TQString <a href="#textFor"><b>textFor</b></a> ( TQWidget * widget, const TQPoint & pos = TQPoint ( ) )</li>
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<li class=fn>void <a href="#hide"><b>hide</b></a> ()</li>
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<li class=fn>TQFont <a href="#font"><b>font</b></a> ()</li>
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<li class=fn>void <a href="#setFont"><b>setFont</b></a> ( const TQFont & font )</li>
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<li class=fn>TQPalette <a href="#palette"><b>palette</b></a> ()</li>
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<li class=fn>void <a href="#setPalette"><b>setPalette</b></a> ( const TQPalette & palette )</li>
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<li class=fn>void setEnabled ( bool enable ) <em>(obsolete)</em></li>
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<li class=fn>bool enabled () <em>(obsolete)</em></li>
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<li class=fn>void <a href="#setGloballyEnabled"><b>setGloballyEnabled</b></a> ( bool enable )</li>
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<li class=fn>bool <a href="#isGloballyEnabled"><b>isGloballyEnabled</b></a> ()</li>
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<li class=fn>void <a href="#setWakeUpDelay"><b>setWakeUpDelay</b></a> ( int i )</li>
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</ul>
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<h2>Protected Members</h2>
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<ul>
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<li class=fn>virtual void <a href="#maybeTip"><b>maybeTip</b></a> ( const TQPoint & p ) = 0</li>
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<li class=fn>void <a href="#tip"><b>tip</b></a> ( const TQRect & rect, const TQString & text )</li>
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<li class=fn>void <a href="#tip-2"><b>tip</b></a> ( const TQRect & rect, const TQString & text, const TQString & groupText )</li>
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<li class=fn>void <a href="#tip-3"><b>tip</b></a> ( const TQRect & rect, const TQString & text, const TQRect & geometry )</li>
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<li class=fn>void <a href="#tip-4"><b>tip</b></a> ( const TQRect & rect, const TQString & text, const TQString & groupText, const TQRect & geometry )</li>
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<li class=fn>void <a href="#clear"><b>clear</b></a> ()</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQToolTip class provides tool tips (balloon help) for
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any widget or rectangular part of a widget.
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<p>
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<p> The tip is a short, single line of text reminding the user of the
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widget's or rectangle's function. It is drawn immediately below
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the region in a distinctive black-on-yellow combination.
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<p> The tip can be any Rich-Text formatted string.
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<p> <a href="qtooltipgroup.html">TQToolTipGroup</a> provides a way for tool tips to display another text
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elsewhere (most often in a <a href="ntqstatusbar.html">status bar</a>).
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<p> At any point in time, TQToolTip is either dormant or active. In
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dormant mode the tips are not shown and in active mode they are.
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The mode is global, not particular to any one widget.
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<p> TQToolTip switches from dormant to active mode when the user hovers
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the mouse on a tip-equipped region for a second or so and remains
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active until the user either clicks a mouse button, presses a key,
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lets the mouse hover for five seconds or moves the mouse outside
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<em>all</em> tip-equipped regions for at least a second.
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<p> The TQToolTip class can be used in three different ways:
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<ol type=1>
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<li> Adding a tip to an entire widget.
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<li> Adding a tip to a fixed rectangle within a widget.
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<li> Adding a tip to a dynamic rectangle within a widget.
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</ol>
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<p> To add a tip to a widget, call the <em>static</em> function
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<a href="#add">TQToolTip::add</a>() with the widget and tip as arguments:
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<p> <pre>
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TQToolTip::<a href="#add">add</a>( quitButton, "Leave the application" );
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</pre>
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<p> This is the simplest and most common use of TQToolTip. The tip
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will be deleted automatically when <em>quitButton</em> is deleted, but
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you can remove it yourself, too:
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<p> <pre>
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TQToolTip::<a href="#remove">remove</a>( quitButton );
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</pre>
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<p> You can also display another text (typically in a <a href="ntqstatusbar.html">status bar),</a> courtesy of <a href="qtooltipgroup.html">TQToolTipGroup</a>. This example
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assumes that <em>grp</em> is a <tt>TQToolTipGroup *</tt> and is already
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connected to the appropriate status bar:
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<p> <pre>
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TQToolTip::<a href="#add">add</a>( quitButton, "Leave the application", grp,
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"Leave the application, prompting to save if necessary" );
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TQToolTip::<a href="#add">add</a>( closeButton, "Close this window", grp,
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"Close this window, prompting to save if necessary" );
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</pre>
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<p> To add a tip to a fixed rectangle within a widget, call the static
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function <a href="#add">TQToolTip::add</a>() with the widget, rectangle and tip as
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arguments. (See the <a href="tooltip-example.html">tooltip/tooltip.cpp</a> example.) Again, you
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can supply a <tt>TQToolTipGroup *</tt> and another text if you want.
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<p> Both of these are one-liners and cover the majority of cases. The
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third and most general way to use TQToolTip requires you to
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reimplement a pure virtual function to decide whether to pop up a
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tool tip. The <a href="tooltip-example.html">tooltip/tooltip.cpp</a> example demonstrates this
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too. This mode can be used to implement tips for text that can
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move as the user scrolls, for example.
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<p> To use TQToolTip like this, you must subclass TQToolTip and
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reimplement <a href="#maybeTip">maybeTip</a>(). TQToolTip calls maybeTip() when a tip
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should pop up, and maybeTip() decides whether to show a tip.
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<p> Tool tips can be globally disabled using
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<a href="#setGloballyEnabled">TQToolTip::setGloballyEnabled</a>() or disabled in groups with
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<a href="qtooltipgroup.html#setEnabled">TQToolTipGroup::setEnabled</a>().
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<p> You can retrieve the text of a tooltip for a given position within
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a widget using <a href="#textFor">textFor</a>().
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<p> The global tooltip font and palette can be set with the static
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<a href="#setFont">setFont</a>() and <a href="#setPalette">setPalette</a>() functions respectively.
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<p> <p>See also <a href="ntqstatusbar.html">TQStatusBar</a>, <a href="ntqwhatsthis.html">TQWhatsThis</a>, <a href="qtooltipgroup.html">TQToolTipGroup</a>, <a href="guibooks.html#fowler">GUI Design Handbook: Tool Tip</a>, and <a href="helpsystem.html">Help System</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQToolTip"></a>TQToolTip::TQToolTip ( <a href="ntqwidget.html">TQWidget</a> * widget, <a href="qtooltipgroup.html">TQToolTipGroup</a> * group = 0 )
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</h3>
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Constructs a tool tip object. This is only necessary if you need
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tool tips on regions that can move within the widget (most often
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because the widget's contents can scroll).
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<p> <em>widget</em> is the widget you want to add dynamic tool tips to and
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<em>group</em> (optional) is the tool tip group they should belong to.
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<p> <b>Warning:</b> TQToolTip is not a subclass of <a href="ntqobject.html">TQObject</a>, so the instance of
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TQToolTip is not deleted when <em>widget</em> is deleted.
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<p> <b>Warning:</b> If you delete the tool tip before you have deleted
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<em>widget</em> then you need to make sure you call <a href="#remove">remove</a>() yourself from
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<em>widget</em> in your reimplemented TQToolTip destructor.
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<p> <pre>
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MyToolTip::~MyToolTip()
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{
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<a href="#remove">remove</a>( widget );
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}
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</pre>
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<p> <p>See also <a href="#maybeTip">maybeTip</a>().
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<h3 class=fn>void <a name="add"></a>TQToolTip::add ( <a href="ntqwidget.html">TQWidget</a> * widget, const <a href="ntqstring.html">TQString</a> & text )<tt> [static]</tt>
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</h3>
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Adds a tool tip to <em>widget</em>. <em>text</em> is the text to be shown in
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the tool tip.
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<p> This is the most common entry point to the TQToolTip class; it is
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suitable for adding tool tips to buttons, checkboxes, comboboxes
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and so on.
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<p>Examples: <a href="helpsystem-example.html#x2695">helpsystem/mainwindow.cpp</a>, <a href="qdir-example.html#x1848">qdir/qdir.cpp</a>, <a href="scribble-example.html#x945">scribble/scribble.cpp</a>, and <a href="tooltip-example.html#x450">tooltip/tooltip.cpp</a>.
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<h3 class=fn>void <a name="add-2"></a>TQToolTip::add ( <a href="ntqwidget.html">TQWidget</a> * widget, const <a href="ntqstring.html">TQString</a> & text, <a href="qtooltipgroup.html">TQToolTipGroup</a> * group, const <a href="ntqstring.html">TQString</a> & longText )<tt> [static]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Adds a tool tip to <em>widget</em> and to tool tip group <em>group</em>.
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<p> <em>text</em> is the text shown in the tool tip and <em>longText</em> is the
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text emitted from <em>group</em>.
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<p> Normally, <em>longText</em> is shown in a <a href="ntqstatusbar.html">status
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bar</a> or similar.
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<h3 class=fn>void <a name="add-3"></a>TQToolTip::add ( <a href="ntqwidget.html">TQWidget</a> * widget, const <a href="ntqrect.html">TQRect</a> & rect, const <a href="ntqstring.html">TQString</a> & text )<tt> [static]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Adds a tool tip to a fixed rectangle, <em>rect</em>, within <em>widget</em>.
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<em>text</em> is the text shown in the tool tip.
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<h3 class=fn>void <a name="add-4"></a>TQToolTip::add ( <a href="ntqwidget.html">TQWidget</a> * widget, const <a href="ntqrect.html">TQRect</a> & rect, const <a href="ntqstring.html">TQString</a> & text, <a href="qtooltipgroup.html">TQToolTipGroup</a> * group, const <a href="ntqstring.html">TQString</a> & groupText )<tt> [static]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Adds a tool tip to an entire <em>widget</em> and to tool tip group <em>group</em>. The tooltip will disappear when the mouse leaves the <em>rect</em>.
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<p> <em>text</em> is the text shown in the tool tip and <em>groupText</em> is the
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text emitted from <em>group</em>.
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<p> Normally, <em>groupText</em> is shown in a <a href="ntqstatusbar.html">status
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bar</a> or similar.
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<h3 class=fn>void <a name="clear"></a>TQToolTip::clear ()<tt> [protected]</tt>
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</h3>
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Immediately removes all tool tips for this tooltip's parent
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widget.
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<h3 class=fn>bool <a name="enabled"></a>TQToolTip::enabled ()<tt> [static]</tt>
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</h3>
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<p> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn><a href="ntqfont.html">TQFont</a> <a name="font"></a>TQToolTip::font ()<tt> [static]</tt>
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</h3>
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Returns the font common to all tool tips.
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<p> <p>See also <a href="#setFont">setFont</a>().
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<h3 class=fn><a href="qtooltipgroup.html">TQToolTipGroup</a> * <a name="group"></a>TQToolTip::group () const
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</h3>
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<p> Returns the tool tip group this TQToolTip is a member of or 0 if it
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isn't a member of any group.
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<p> The tool tip group is the object responsible for maintaining
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contact between tool tips and a <a href="ntqstatusbar.html">status
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bar</a> or something else which can show the longer help text.
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<p> <p>See also <a href="#parentWidget">parentWidget</a>() and <a href="qtooltipgroup.html">TQToolTipGroup</a>.
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<h3 class=fn>void <a name="hide"></a>TQToolTip::hide ()<tt> [static]</tt>
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</h3>
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Hides any tip that is currently being shown.
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<p> Normally, there is no need to call this function; TQToolTip takes
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care of showing and hiding the tips as the user moves the mouse.
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<h3 class=fn>bool <a name="isGloballyEnabled"></a>TQToolTip::isGloballyEnabled ()<tt> [static]</tt>
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</h3>
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Returns whether tool tips are enabled globally.
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<p> <p>See also <a href="#setGloballyEnabled">setGloballyEnabled</a>().
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<h3 class=fn>void <a name="maybeTip"></a>TQToolTip::maybeTip ( const <a href="ntqpoint.html">TQPoint</a> & p )<tt> [pure virtual protected]</tt>
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</h3>
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<p> This pure virtual function is half of the most versatile interface
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TQToolTip offers.
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<p> It is called when there is a possibility that a tool tip should be
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shown and must decide whether there is a tool tip for the point <em>p</em> in the widget that this TQToolTip object relates to. If so,
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<a href="#maybeTip">maybeTip</a>() must call <a href="#tip">tip</a>() with the rectangle the tip applies to,
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the tip's text and optionally the <a href="qtooltipgroup.html">TQToolTipGroup</a> details and the
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geometry in screen coordinates.
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<p> <em>p</em> is given in that widget's local coordinates. Most maybeTip()
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implementations will be of the form:
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<p> <pre>
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if ( <something> ) {
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<a href="#tip">tip</a>( <something>, <something> );
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}
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</pre>
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<p> The first argument to tip() (a rectangle) must encompass <em>p</em>,
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i.e. the tip must apply to the current mouse position; otherwise
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TQToolTip's operation is undefined.
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<p> Note that the tip will disappear once the mouse moves outside the
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rectangle you give to tip(), and will not reappear if the mouse
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moves back in: maybeTip() is called again instead.
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<p> <p>See also <a href="#tip">tip</a>().
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<p>Examples: <a href="helpsystem-example.html#x2684">helpsystem/tooltip.cpp</a> and <a href="tooltip-example.html#x451">tooltip/tooltip.cpp</a>.
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<h3 class=fn><a href="ntqpalette.html">TQPalette</a> <a name="palette"></a>TQToolTip::palette ()<tt> [static]</tt>
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</h3>
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Returns the palette common to all tool tips.
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<p> <p>See also <a href="#setPalette">setPalette</a>().
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<h3 class=fn><a href="ntqwidget.html">TQWidget</a> * <a name="parentWidget"></a>TQToolTip::parentWidget () const
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</h3>
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<p> Returns the widget this TQToolTip applies to.
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<p> The tool tip is destroyed automatically when the parent widget is
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destroyed.
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<p> <p>See also <a href="#group">group</a>().
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<h3 class=fn>void <a name="remove"></a>TQToolTip::remove ( <a href="ntqwidget.html">TQWidget</a> * widget )<tt> [static]</tt>
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</h3>
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Removes the tool tip from <em>widget</em>.
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<p> If there is more than one tool tip on <em>widget</em>, only the one
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covering the entire widget is removed.
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<h3 class=fn>void <a name="remove-2"></a>TQToolTip::remove ( <a href="ntqwidget.html">TQWidget</a> * widget, const <a href="ntqrect.html">TQRect</a> & rect )<tt> [static]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Removes any tool tip for <em>rect</em> from <em>widget</em>.
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<p> If there is more than one tool tip on <em>widget</em>, only the one
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covering rectangle <em>rect</em> is removed.
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<h3 class=fn>void <a name="setEnabled"></a>TQToolTip::setEnabled ( bool enable )<tt> [static]</tt>
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</h3>
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<p> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn>void <a name="setFont"></a>TQToolTip::setFont ( const <a href="ntqfont.html">TQFont</a> & font )<tt> [static]</tt>
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</h3>
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Sets the font for all tool tips to <em>font</em>.
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<p> <p>See also <a href="#font">font</a>().
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<h3 class=fn>void <a name="setGloballyEnabled"></a>TQToolTip::setGloballyEnabled ( bool enable )<tt> [static]</tt>
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</h3>
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If <em>enable</em> is TRUE sets all tool tips to be enabled (shown when
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needed); if <em>enable</em> is FALSE sets all tool tips to be disabled
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(never shown).
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<p> By default, tool tips are enabled. Note that this function affects
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all tool tips in the entire application.
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<p> <p>See also <a href="qtooltipgroup.html#enabled-prop">TQToolTipGroup::enabled</a>.
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<h3 class=fn>void <a name="setPalette"></a>TQToolTip::setPalette ( const <a href="ntqpalette.html">TQPalette</a> & palette )<tt> [static]</tt>
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</h3>
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Sets the palette for all tool tips to <em>palette</em>.
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<p> <p>See also <a href="#palette">palette</a>().
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<h3 class=fn>void <a name="setWakeUpDelay"></a>TQToolTip::setWakeUpDelay ( int i )<tt> [static]</tt>
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</h3>
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Sets the wakeup delay for all tooltips to <em>i</em>
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milliseconds.
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<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="textFor"></a>TQToolTip::textFor ( <a href="ntqwidget.html">TQWidget</a> * widget, const <a href="ntqpoint.html">TQPoint</a> & pos = TQPoint ( ) )<tt> [static]</tt>
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</h3>
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Returns the tool tip text for <em>widget</em> at position <em>pos</em>, or
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<a href="ntqstring.html#TQString-null">TQString::null</a> if there is no tool tip for the given widget and
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position.
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<h3 class=fn>void <a name="tip"></a>TQToolTip::tip ( const <a href="ntqrect.html">TQRect</a> & rect, const <a href="ntqstring.html">TQString</a> & text )<tt> [protected]</tt>
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</h3>
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Immediately pops up a tip saying <em>text</em> and removes the tip once
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the cursor moves out of rectangle <em>rect</em> (which is given in the
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|
coordinate system of the widget this TQToolTip relates to).
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<p> The tip will not reappear if the cursor moves back; your
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|
<a href="#maybeTip">maybeTip</a>() must reinstate it each time.
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|
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<h3 class=fn>void <a name="tip-2"></a>TQToolTip::tip ( const <a href="ntqrect.html">TQRect</a> & rect, const <a href="ntqstring.html">TQString</a> & text, const <a href="ntqstring.html">TQString</a> & groupText )<tt> [protected]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
<p> Immediately pops up a tip saying <em>text</em> and removes that tip once
|
|
the cursor moves out of rectangle <em>rect</em> (which is given in the
|
|
coordinate system of the widget this TQToolTip relates to). <em>groupText</em> is the text emitted from the group.
|
|
<p> The tip will not reappear if the cursor moves back; your
|
|
<a href="#maybeTip">maybeTip</a>() must reinstate it each time.
|
|
|
|
<h3 class=fn>void <a name="tip-3"></a>TQToolTip::tip ( const <a href="ntqrect.html">TQRect</a> & rect, const <a href="ntqstring.html">TQString</a> & text, const <a href="ntqrect.html">TQRect</a> & geometry )<tt> [protected]</tt>
|
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</h3>
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
<p> Immediately pops up a tip within the rectangle <em>geometry</em>, saying
|
|
<em>text</em> and removes the tip once the cursor moves out of rectangle
|
|
<em>rect</em>. Both rectangles are given in the coordinate system of the
|
|
widget this TQToolTip relates to.
|
|
<p> The tip will not reappear if the cursor moves back; your
|
|
<a href="#maybeTip">maybeTip</a>() must reinstate it each time.
|
|
<p> If the tip does not fit inside <em>geometry</em>, the tip expands.
|
|
|
|
<h3 class=fn>void <a name="tip-4"></a>TQToolTip::tip ( const <a href="ntqrect.html">TQRect</a> & rect, const <a href="ntqstring.html">TQString</a> & text, const <a href="ntqstring.html">TQString</a> & groupText, const <a href="ntqrect.html">TQRect</a> & geometry )<tt> [protected]</tt>
|
|
</h3>
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
<p> Immediately pops up a tip within the rectangle <em>geometry</em>, saying
|
|
<em>text</em> and removes the tip once the cursor moves out of rectangle
|
|
<em>rect</em>. <em>groupText</em> is the text emitted from the group. Both
|
|
rectangles are given in the coordinate system of the widget this
|
|
TQToolTip relates to.
|
|
<p> The tip will not reappear if the cursor moves back; your
|
|
<a href="#maybeTip">maybeTip</a>() must reinstate it each time.
|
|
<p> If the tip does not fit inside <em>geometry</em>, the tip expands.
|
|
|
|
<!-- eof -->
|
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<hr><p>
|
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This file is part of the <a href="index.html">TQt toolkit</a>.
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|
Copyright © 1995-2007
|
|
<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 © 2007
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
|
</table></div></address></body>
|
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</html>
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