7482426735
methods/constants to support Fl_Output as a special case of Fl_Input (you can do everything but change the text in Fl_Output...) git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@2073 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
450 lines
18 KiB
HTML
450 lines
18 KiB
HTML
<HTML><BODY>
|
|
<!-- NEW PAGE -->
|
|
<H2><A name=Fl_Widget>class Fl_Widget</A></H2>
|
|
<HR>
|
|
<H3>Class Hierarchy</H3>
|
|
<UL>
|
|
<PRE>
|
|
<B>Fl_Widget</B>
|
|
|
|
|
+----<A href=Fl_Box.html#Fl_Box>Fl_Box</A>, <A href=Fl_Browser_.html#Fl_Browser_>Fl_Browser_</A>, <A href=Fl_Button.html#Fl_Button>Fl_Button</A>, <A href=Fl_Chart.html#Fl_Chart>Fl_Chart</A>, <A href=Fl_Clock.html#Fl_Clock>Fl_Clock</A>,
|
|
<A href=Fl_Free.html#Fl_Free>Fl_Free</A>, <A href=Fl_Group.html#Fl_Group>Fl_Group</A>, <A href=Fl_Input_.html#Fl_Input_>Fl_Input_</A>, <A href=Fl_Menu_.html#Fl_Menu_>Fl_Menu_</A>, <A href=Fl_Positioner.html#Fl_Positioner>Fl_Positioner</A>,
|
|
<A href=Fl_Timer.html#Fl_Timer>Fl_Timer</A>, <A href=Fl_Valuator.html#Fl_Valuator>Fl_Valuator</A>
|
|
</PRE>
|
|
</UL>
|
|
<H3>Include Files</H3>
|
|
<UL>
|
|
<PRE>
|
|
#include <FL/Fl_Widget.H>
|
|
</PRE>
|
|
</UL>
|
|
<H3>Description</H3>
|
|
<TT>Fl_Widget</TT> is the base class for all widgets in FLTK. You can't
|
|
create one of these because the constructor is not public. However you
|
|
can <A href="subclassing.html#subclassing">subclass</A> it.
|
|
<P>All "property" accessing methods, such as <TT>color()</TT>, <TT>
|
|
parent()</TT>, or <TT>argument()</TT> are implemented as trivial inline
|
|
functions and thus are as fast and small as accessing fields in a
|
|
structure. Unless otherwise noted, the property setting methods such as <TT>
|
|
color(n)</TT> or <TT>label(s)</TT> are also trivial inline functions,
|
|
even if they change the widget's appearance. It is up to the user code
|
|
to call <TT>redraw()</TT> after these. </P>
|
|
<H3>Methods</H3>
|
|
<CENTER>
|
|
<TABLE width=90% summary="Fl_Widget methods.">
|
|
<TR><TD align=left valign=top>
|
|
<UL>
|
|
<LI><A href=#Fl_Widget.Fl_Widget>Fl_Widget</A></LI>
|
|
<LI><A href=#Fl_Widget.~Fl_Widget>~Fl_Widget</A></LI>
|
|
<LI><A href=#Fl_Widget.activate>activate</A></LI>
|
|
<LI><A href=#Fl_Widget.active>active</A></LI>
|
|
<LI><A href=#Fl_Widget.active_r>active_r</A></LI>
|
|
<LI><A href=#Fl_Widget.align>align</A></LI>
|
|
<LI><A href=#Fl_Widget.argument>argument</A></LI>
|
|
<LI><A href=#Fl_Widget.box>box</A></LI>
|
|
<LI><A href=#Fl_Widget.callback>callback</A></LI>
|
|
</UL>
|
|
</TD><TD align=left valign=top>
|
|
<UL>
|
|
<LI><A href=#Fl_Widget.changed>changed</A></LI>
|
|
<LI><A href=#Fl_Widget.clear_changed>clear_changed</A></LI>
|
|
<LI><A href=#Fl_Widget.color>color</A></LI>
|
|
<LI><A href=#Fl_Widget.contains>contains</A></LI>
|
|
<LI><A href=#Fl_Widget.damage>damage</A></LI>
|
|
<LI><A href=#Fl_Widget.deactivate>deactivate</A></LI>
|
|
<LI><A href=#Fl_Widget.default_callback>default_callback</A></LI>
|
|
<LI><A href=#Fl_Widget.deimage>deimage</A></LI>
|
|
<LI><A href=#Fl_Widget.do_callback>do_callback</A></LI>
|
|
<LI><A href=#Fl_Widget.h>h</A></LI>
|
|
</UL>
|
|
</TD><TD align=left valign=top>
|
|
<UL>
|
|
<LI><A href=#Fl_Widget.handle>handle</A></LI>
|
|
<LI><A href=#Fl_Widget.hide>hide</A></LI>
|
|
<LI><A href=#Fl_Widget.image>image</A></LI>
|
|
<LI><A href=#Fl_Widget.inside>inside</A></LI>
|
|
<LI><A href=#Fl_Widget.label>label</A></LI>
|
|
<LI><A href=#Fl_Widget.labelcolor>labelcolor</A></LI>
|
|
<LI><A href=#Fl_Widget.labelfont>labelfont</A></LI>
|
|
<LI><A href=#Fl_Widget.labelsize>labelsize</A></LI>
|
|
<LI><A href=#Fl_Widget.labeltype>labeltype</A></LI>
|
|
<LI><A href=#Fl_Widget.output>output</A></LI>
|
|
</UL>
|
|
</TD><TD align=left valign=top>
|
|
<UL>
|
|
<LI><A href=#Fl_Widget.parent>parent</A></LI>
|
|
<LI><A href=#Fl_Widget.position>position</A></LI>
|
|
<LI><A href=#Fl_Widget.redraw>redraw</A></LI>
|
|
<LI><A href=#Fl_Widget.resize>resize</A></LI>
|
|
<LI><A href=#Fl_Widget.selection_color>selection_color</A></LI>
|
|
<LI><A href=#Fl_Widget.set_changed>set_changed</A></LI>
|
|
<LI><A href=#Fl_Widget.show>show</A></LI>
|
|
<LI><A href=#Fl_Widget.size>size</A></LI>
|
|
<LI><A href=#Fl_Widget.take_focus>take_focus</A></LI>
|
|
<LI><A href=#Fl_Widget.takesevents>takesevents</A></LI>
|
|
</UL>
|
|
</TD><TD align=left valign=top>
|
|
<UL>
|
|
<LI><A href="#Fl_Widget.tooltip">tooltip</A></LI>
|
|
<LI><A href=#Fl_Widget.type>type</A></LI>
|
|
<LI><A href=#Fl_Widget.user_data>user_data</A></LI>
|
|
<LI><A href=#Fl_Widget.visible>visible</A></LI>
|
|
<LI><A href=#Fl_Widget.visible_r>visible_r</A></LI>
|
|
<LI><A href=#Fl_Widget.w>w</A></LI>
|
|
<LI><A href=#Fl_Widget.when>when</A></LI>
|
|
<LI><A href=#Fl_Widget.window>window</A></LI>
|
|
<LI><A href=#Fl_Widget.x>x</A></LI>
|
|
<LI><A href=#Fl_Widget.y>y</A></LI>
|
|
</UL>
|
|
</TD></TR>
|
|
</TABLE>
|
|
</CENTER>
|
|
|
|
<H4><A NAME="Fl_Widget.Fl_Widget">protected Fl_Widget::Fl_Widget(int x, int y, int w, int h, const char*
|
|
label=0);</A></H4>
|
|
|
|
<P>Creates a widget at the given position and size. The
|
|
<TT>Fl_Widget</TT> is a protected constructor, but all derived
|
|
widgets have a matching public constructor. It takes a value for
|
|
<TT>x()</TT>, <TT>y()</TT>, <TT>w()</TT>, <TT>h()</TT>, and an
|
|
optional value for <TT>label()</TT>.
|
|
|
|
<H4><A NAME="Fl_Widget.~Fl_Widget">virtual Fl_Widget::~Fl_Widget();</A></H4>
|
|
|
|
<P>Destroys the widget. Destroying single widgets is not very
|
|
common, and it is your responsibility to either
|
|
<TT>remove()</TT> them from any enclosing group or destroy that
|
|
group <I>immediately</I> after destroying the children. You
|
|
almost always want to destroy the parent group instead which
|
|
will destroy all of the child widgets and groups in that group.
|
|
|
|
<H4><A NAME="Fl_Widget.type">uchar Fl_Widget::type() const;</A></H4>
|
|
|
|
<P>Returns the widget type value, which is used for Forms
|
|
compatability and to simulate RTTI.
|
|
|
|
<H4><A name=Fl_Widget.x>short Fl_Widget::x() const</A>
|
|
<BR><A name=Fl_Widget.y>short Fl_Widget::y() const</A>
|
|
<BR><A name=Fl_Widget.w>short Fl_Widget::w() const</A>
|
|
<BR><A name=Fl_Widget.h>short Fl_Widget::h() const</A></H4>
|
|
|
|
<P>Returns the position of the upper-left corner of the widget
|
|
in its enclosing Fl_Window (<I>not</I> its parent if that is not
|
|
an Fl_Window), and its width and height.
|
|
|
|
<H4><A name=Fl_Widget.resize>virtual void
|
|
Fl_Widget::resize(int x, int y, int w, int h)</A>
|
|
<BR><A name=Fl_Widget.position>void Fl_Widget::position(short x, short y)</A>
|
|
<BR><A name=Fl_Widget.size>void Fl_Widget::size(short w, short h)</A></H4>
|
|
|
|
<P>Change the size or position of the widget. This is a virtual
|
|
function so that the widget may implement its own handling of
|
|
resizing. The default version does <I>not</I> call the
|
|
<TT>redraw()</TT> method, but instead relies on the parent
|
|
widget to do so because the parent may know a faster way to
|
|
update the display, such as scrolling from the old position.
|
|
|
|
<P><TT>position(x,y)</TT> is a shortcut for <TT>resize(x,y,w(),h())</TT>,
|
|
and <TT>size(w,h)</TT> is a shortcut for <TT>resize(x(),y(),w,h)</TT>.</P>
|
|
|
|
<H4><A name=Fl_Widget.window>Fl_Window* Fl_Widget::window() const;</A></H4>
|
|
|
|
<P>Returns a pointer to the primary <A
|
|
href=Fl_Window.html#Fl_Window><TT>Fl_Window</TT></A> widget.
|
|
Returns <TT>NULL</TT> if no window is associated with this
|
|
widget. Note: for an <TT>Fl_Window</TT> widget, this returns
|
|
its <I>parent</I> window (if any), not <I>this</I> window.
|
|
|
|
<H4><A name=Fl_Widget.box>Fl_Boxtype Fl_Widget::box() const
|
|
<BR> void Fl_Widget::box(Fl_Boxtype)</A></H4>
|
|
|
|
<P>Gets or sets the box type for the widget, which identifies a
|
|
routine that draws the background of the widget. See <A
|
|
href="common.html#boxtypes">Box Types</A> for the available
|
|
types. The default depends on the widget, but is usually
|
|
<TT>FL_NO_BOX</TT> or <TT>FL_UP_BOX</TT>.
|
|
|
|
<H4><A name=Fl_Widget.color>Fl_Color Fl_Widget::color() const
|
|
<BR>void Fl_Widget::color(Fl_Color)
|
|
<BR>void Fl_Widget::color(Fl_Color, Fl_Color)</A></H4>
|
|
|
|
<P>Gets or sets the background color of the widget. The color is
|
|
passed to the box routine. The color is either an index into an
|
|
internal table of RGB colors or an RGB color value generated
|
|
using <TT>fl_rgb_color()</TT>. The default for most widgets is
|
|
<TT>FL_GRAY</TT>. See the <A
|
|
href=enumerations.html#Enumerations>enumeration list</A> for
|
|
predefined colors. Use <A
|
|
href="Fl.html#Fl.set_color"><TT>Fl::set_color()</TT></A> to
|
|
redefine colors.
|
|
|
|
<P>The two color form sets both the background and selection
|
|
colors. See the description of the <A
|
|
HREF="#Fl_Widget.selection_color"><TT>selection_color()</TT></A>
|
|
method for more information.
|
|
|
|
<H4><A name=Fl_Widget.selection_color>Fl_Color
|
|
Fl_Widget::selection_color() const
|
|
<BR>void Fl_Widget::selection_color(Fl_Color)</A></H4>
|
|
|
|
<P>Gets or sets the selection color, which is defined for Forms
|
|
compatibility and is usually used to color the widget when it is
|
|
selected, although some widgets use this color for other
|
|
purposes. You can set both colors at once with
|
|
<TT>color(a,b)</TT>.
|
|
|
|
<H4><A name=Fl_Widget.label>const char* Fl_Widget::label() const
|
|
<BR> void Fl_Widget::label(const char*)</A></H4>
|
|
|
|
<P>Get or set the current label pointer. The label is shown
|
|
somewhere on or next to the widget. The passed pointer is stored
|
|
unchanged in the widget (the string is <I>not</I> copied), so if
|
|
you need to set the label to a formatted value, make sure the
|
|
buffer is <TT>static</TT>, global, or allocated.
|
|
|
|
<H4><A name=Fl_Widget.labeltype>void Fl_Widget::label(Fl_Labeltype,
|
|
const char*)
|
|
<BR> uchar Fl_Widget::labeltype() const
|
|
<BR> void Fl_Widget::labeltype(Fl_Labeltype)</A></H4>
|
|
|
|
<P>Gets or sets the <A
|
|
href="common.html#labeltypes"><TT>labeltype</TT></A> which
|
|
identifies the function that draws the label of the widget. This
|
|
is generally used for special effects such as embossing or for
|
|
using the <TT>label()</TT> pointer as another form of data such
|
|
as an icon. The value <TT>FL_NORMAL_LABEL</TT> prints the label
|
|
as plain text.
|
|
|
|
<H4><A name=Fl_Widget.align>Fl_Align Fl_Widget::align() const
|
|
<BR> void Fl_Widget::align(Fl_Align)</A></H4>
|
|
|
|
<P>Gets or sets the label alignment, which controls how the
|
|
label is displayed next to or inside the widget. The default
|
|
value is <TT>FL_ALIGN_CENTER</TT>, which centers the label
|
|
inside the widget. The value can be any of these constants
|
|
bitwise-OR'd together:
|
|
|
|
<UL>
|
|
<LI><TT>FL_ALIGN_BOTTOM</TT></LI>
|
|
<LI><TT>FL_ALIGN_CENTER</TT></LI>
|
|
<LI><TT>FL_ALIGN_CLIP</TT></LI>
|
|
<LI><TT>FL_ALIGN_INSIDE</TT></LI>
|
|
<LI><TT>FL_ALIGN_LEFT</TT></LI>
|
|
<LI><TT>FL_ALIGN_RIGHT</TT></LI>
|
|
<LI><TT>FL_ALIGN_TEXT_OVER_IMAGE</TT></LI>
|
|
<LI><TT>FL_ALIGN_TOP</TT></LI>
|
|
<LI><TT>FL_ALIGN_WRAP</TT></LI>
|
|
</UL>
|
|
|
|
<H4><A name=Fl_Widget.labelcolor>Fl_Color Fl_Widget::labelcolor() const
|
|
<BR> void Fl_Widget::labelcolor(Fl_Color)</A></H4>
|
|
|
|
<P>Gets or sets the label color. The default color is <TT>FL_BLACK</TT>.
|
|
|
|
<H4><A name=Fl_Widget.labelfont>Fl_Font Fl_Widget::labelfont() const
|
|
<BR> void Fl_Widget::labelfont(Fl_Font)</A></H4>
|
|
|
|
<P>Gets or sets the font to use. Fonts are identified by small
|
|
8-bit indexes into a table. See the <A
|
|
href=enumerations.html#Enumerations> enumeration list</A> for
|
|
predefined typefaces. The default value uses a Helvetica
|
|
typeface (Arial for Microsoft® Windows®). The function
|
|
<A href="Fl.html#Fl.set_font"><TT>Fl::set_font()</TT></A> can
|
|
define new typefaces.
|
|
|
|
<H4><A name=Fl_Widget.labelsize>uchar Fl_Widget::labelsize() const
|
|
<BR>void Fl_Widget::labelsize(uchar)</A></H4>
|
|
|
|
<P>Gets or sets the font size in pixels. The default size is 14
|
|
pixels.
|
|
|
|
<H4><A name=Fl_Widget.callback>typedef void (Fl_Callback)(Fl_Widget*, void*)
|
|
<BR>Fl_Callback* Fl_Widget::callback() const
|
|
<BR>void Fl_Widget::callback(Fl_Callback*, void* = 0)
|
|
<BR>void Fl_Widget::callback(void (*)(Fl_Widget*, long), long = 0)
|
|
<BR>void Fl_Widget::callback(void (*)(Fl_Widget*))</A></H4>
|
|
|
|
<P>Gets or sets the current callback function for the widget.
|
|
Each widget has a single callback.
|
|
|
|
<H4><A name=Fl_Widget.user_data>void* Fl_Widget::user_data() const
|
|
<BR>void Fl_Widget::user_data(void*)</A></H4>
|
|
|
|
<P>Gets or sets the current user data (<TT>void *</TT>) argument
|
|
that is passed to the callback function.
|
|
|
|
<H4><A name=Fl_Widget.argument>long Fl_Widget::argument() const
|
|
<BR> void Fl_Widget::argument(long)</A></H4>
|
|
|
|
<P>Gets or sets the current user data (<TT>long</TT>) argument
|
|
that is passed to the callback function.
|
|
|
|
<CENTER><TABLE BORDER="1" CELLPADDING="5" CELLSPACING="0" BGCOLOR="#cccccc">
|
|
<TR>
|
|
<TD><B>Note:</B>
|
|
|
|
<P>This is implemented by casting the <TT>long</TT>
|
|
value to a <TT>void *</TT> and may not be portable on
|
|
some machines.
|
|
|
|
</TD>
|
|
</TR>
|
|
</TABLE></CENTER>
|
|
|
|
<H4><A name=Fl_Widget.do_callback>void Fl_Widget::do_callback()
|
|
<BR> void Fl_Widget::do_callback(Fl_Widget*, void* = 0)
|
|
<BR> void Fl_Widget::do_callback(Fl_Widget*, long)</A></H4>
|
|
|
|
<P>Causes a widget to invoke its callback function, optionally
|
|
with arbitrary arguments.
|
|
|
|
<H4><A name=Fl_Widget.changed>int Fl_Widget::changed() const</A>
|
|
<BR><A name=Fl_Widget.set_changed>void Fl_Widget::set_changed()</A>
|
|
<BR><A name=Fl_Widget.clear_changed>void Fl_Widget::clear_changed()</A></H4>
|
|
|
|
<P><TT>Fl_Widget::changed()</TT> is a flag that is turned on
|
|
when the user changes the value stored in the widget. This is
|
|
only used by subclasses of <TT>Fl_Widget</TT> that store values,
|
|
but is in the base class so it is easier to scan all the widgets
|
|
in a panel and <TT> do_callback()</TT> on the changed ones in
|
|
response to an "OK" button.
|
|
|
|
<P>Most widgets turn this flag off when they do the callback, and when
|
|
the program sets the stored value. </P>
|
|
|
|
<H4><A name=Fl_Widget.when>Fl_When Fl_Widget::when() const
|
|
<BR> void Fl_Widget::when(Fl_When)</A></H4>
|
|
|
|
<P><TT>Fl_Widget::when()</TT> is a set of bitflags used by
|
|
subclasses of <TT> Fl_Widget</TT> to decide when to do the
|
|
callback. If the value is zero then the callback is never
|
|
done. Other values are described in the individual widgets.
|
|
This field is in the base class so that you can scan a panel and
|
|
<TT>do_callback()</TT> on all the ones that don't do their own
|
|
callbacks in response to an "OK" button.
|
|
|
|
<H4><A name=Fl_Widget.default_callback>static void
|
|
Fl_Widget::default_callback(Fl_Widget*, void*)</A></H4>
|
|
|
|
<P>The default callback, which puts a pointer to the widget on
|
|
the queue returned by <A
|
|
href="Fl.html#Fl.readqueue"><TT>Fl::readqueue()</TT></A>. You
|
|
may want to call this from your own callback.
|
|
|
|
<H4><A name=Fl_Widget.visible>int Fl_Widget::visible() const</A><BR>
|
|
<A name=Fl_Widget.visible_r>int Fl_Widget::visible_r() const</A><BR>
|
|
<A name=Fl_Widget.show>void Fl_Widget::show()</A><BR>
|
|
<A name=Fl_Widget.hide>void Fl_Widget::hide()</A></H4>
|
|
|
|
<P>An invisible widget never gets redrawn and does not get
|
|
events. The <TT>visible()</TT> method returns true if the
|
|
widget is set to be visible.The <TT>visible_r()</TT> method
|
|
returns true if the widget and all of its parents are visible. A
|
|
widget is only visible if <TT>visible()</TT> is true on it
|
|
<I>and all of its parents</I>.
|
|
|
|
<P>Changing it will send <TT>FL_SHOW</TT> or <TT>FL_HIDE</TT>
|
|
events to the widget. <I>Do not change it if the parent is not
|
|
visible, as this will send false <TT>FL_SHOW</TT> or <TT>FL_HIDE</TT>
|
|
events to the widget</I>. <TT>redraw()</TT> is called if necessary on
|
|
this or the parent.
|
|
|
|
<H4><A name=Fl_Widget.active>int Fl_Widget::active() const</A><BR>
|
|
<A name=Fl_Widget.active_r>int Fl_Widget::active_r() const</A></BR>
|
|
<A name=Fl_Widget.activate>void Fl_Widget::activate()</A></BR>
|
|
<A name=Fl_Widget.deactivate>void Fl_Widget::deactivate()</A></H4>
|
|
|
|
<P><TT>Fl_Widget::active()</TT> returns whether the widget is
|
|
active. <TT>Fl_Widget::active_r()</TT> returns whether the
|
|
widget and all of its parents are active. An inactive widget
|
|
does not get any events, but it does get redrawn. A widget is
|
|
only active if <TT>active()</TT> is true on it <I>and all of its
|
|
parents</I>.
|
|
|
|
<P>Changing this value will send <TT>FL_ACTIVATE</TT> or <TT>
|
|
FL_DEACTIVATE</TT> to the widget if <tt>active_r()</tt> is true.
|
|
<P>Currently you cannot deactivate <TT>Fl_Window</TT> widgets. </P>
|
|
|
|
<H4><A name=Fl_Widget.output>int Fl_Widget::output() const</A><BR>
|
|
<A name=Fl_Widget.set_output>void Fl_Widget::set_output()</A></BR>
|
|
<A name=Fl_Widget.clear_output>void Fl_Widget::clear_output()</A></H4>
|
|
|
|
<P><tt>output()</tt> means the same as <tt>!active()</tt> except
|
|
it does not change how the widget is drawn. The widget will not
|
|
receive any events. This is useful for making scrollbars or
|
|
buttons that work as displays rather than input devices.
|
|
|
|
<H4><A name=Fl_Widget.takesevents>int Fl_Widget::takesevents() const</A></H4>
|
|
|
|
<P>This is the same as <TT>(active() && !output()
|
|
&& visible())</TT> but is faster.
|
|
|
|
<H4><A name=Fl_Widget.redraw>void Fl_Widget::redraw()</A></H4>
|
|
|
|
<P>Marks the widget as needing its <A
|
|
HREF="subclassing.html#draw"><TT>draw()</TT></A> routine called.
|
|
|
|
<H4><A name=Fl_Widget.damage>uchar Fl_Widget::damage() const</A></H4>
|
|
|
|
<P>Non-zero if <A
|
|
HREF="subclassing.html#draw"><TT>draw()</TT></A> needs to be
|
|
called. The damage value is actually a bit field that the widget
|
|
subclass can use to figure out what parts to draw.
|
|
|
|
<H4><A name=Fl_Widget.parent>Fl_Group *Fl_Widget::parent() const</A></H4>
|
|
|
|
<P>Returns a pointer to the parent widget. Usually this is a <A
|
|
href=Fl_Group.html#Fl_Group> <TT>Fl_Group</TT></A> or <A
|
|
HREF="Fl_Window.html#Fl_Window"><tt>Fl_Window</tt></a>. Returns
|
|
<tt>NULL</tt> if the widget has no parent.
|
|
|
|
<h4><a name="Fl_Widget.contains">int Fl_Widget::contains(Fl_Widget* b) const</A></H4>
|
|
|
|
<P>Returns 1 if <TT>b</TT> is a child of this widget, or is
|
|
equal to this widget. Returns 0 if <TT>b</TT> is <TT>NULL</TT>.
|
|
|
|
<H4><A name=Fl_Widget.inside>int Fl_Widget::inside(const Fl_Widget* a)
|
|
const</A></H4>
|
|
|
|
<P>Returns 1 if this widget is a child of <TT>a</TT>, or is
|
|
equal to <TT>a</TT>. Returns 0 if <TT>a</TT> is <TT>NULL</TT>.
|
|
|
|
<H4><A name=Fl_Widget.take_focus>int Fl_Widget::take_focus()</A></H4>
|
|
Tries to make this widget be the <TT>Fl::focus()</TT> widget, by first
|
|
sending it an <TT>FL_FOCUS</TT> event, and if it returns non-zero,
|
|
setting <TT>Fl::focus()</TT> to this widget. You should use this
|
|
method to assign the focus to an widget. Returns true if the widget
|
|
accepted the focus.
|
|
|
|
<H4><A name="Fl_Widget.deimage">Fl_Image* Fl_Widget::deimage()</A><BR>
|
|
void Fl_Widget::deimage(Fl_Image* a)<BR>
|
|
void Fl_Widget::deimage(Fl_Image& a)</H4>
|
|
|
|
<P>Gets or sets the image to use as part of the widget label.
|
|
This image is used when drawing the widget in the inactive
|
|
state.
|
|
|
|
<H4><A name="Fl_Widget.image">Fl_Image* Fl_Widget::image()</A><BR>
|
|
void Fl_Widget::image(Fl_Image* a)<BR>
|
|
void Fl_Widget::image(Fl_Image& a)</H4>
|
|
|
|
<P>Gets or sets the image to use as part of the widget label.
|
|
This image is used when drawing the widget in the active state.
|
|
|
|
<H4><A name="Fl_Widget.tooltip">const char *Fl_Widget::tooltip()<BR>
|
|
void Fl_Widget::tooltip(const char *t)</A></H4>
|
|
|
|
<P>Gets or sets a string of text to display in a popup tooltip
|
|
window when the user hovers the mouse over the widget. The
|
|
string is <I>not</I> copied, so make sure any formatted string
|
|
is stored in a <TT>static</TT>, global, or allocated buffer.
|
|
|
|
<H4><A name="Fl_Widget.handle">virtual int Fl_Widget::handle(int event)</A></H4>
|
|
|
|
<P>Handles the specified event. You normally don't call this
|
|
method directly, but instead let FLTK do it when the user
|
|
interacts with the widget.
|
|
|
|
</BODY>
|
|
</HTML>
|