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<title>Pmw.MegaToplevel reference manual</title>
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<h1 ALIGN="CENTER">Pmw.MegaToplevel</h1>
<dl>
<dt> <h3>Name</h3></dt><dd>
<p>Pmw.MegaToplevel() -
base class for megawidgets within a toplevel
</p>
</dd>
<dt> <h3>Inherits</h3></dt><dd>
<a href="MegaArchetype.html">Pmw.MegaArchetype</a><br>
</dd>
<dt> <h3>Description</h3></dt><dd>
<p>
This class creates a megawidget contained within a toplevel
window. It may be used directly to create a toplevel megawidget
or it may be used as a base class for more specialised toplevel
megawidgets, such as <a href="Dialog.html">Pmw.Dialog</a>. It creates a Tkinter.Toplevel
component, named <strong>hull</strong>, to act as the container of the megawidget.
The window class name for the <strong>hull</strong> widget is set to the
most-specific class name for the megawidget. Derived classes
specialise this class by creating other widget components as
children of the <strong>hull</strong> widget.</p>
<p> The megawidget may be used as either a normal toplevel window or
as a modal dialog. Use <code>show()</code> and <code>withdraw()</code> for normal use
and <code>activate()</code> and <code>deactivate()</code> for modal dialog use. If the
window is deleted by the window manager while being shown
normally, the default behaviour is to destroy the window. If the
window is deleted by the window manager while the window is active
(ie: when used as a modal dialog), the window is deactivated.
Use the <code>userdeletefunc()</code> and <code>usermodaldeletefunc()</code> methods to
override these behaviours. Do not call <code>protocol()</code> to set the
<strong>WM_DELETE_WINDOW</strong> window manager protocol directly if you want to
use this window as a modal dialog.</p>
<p> The currently active windows form a stack with the most recently
activated window at the top of the stack. All mouse and
keyboard events are sent to this top window. When it
deactivates, the next window in the stack will start to receive
events.</p>
<p></p>
</dd>
<dt> <h3>Options</h3></dt><dd>
Options for this megawidget and its base
classes are described below.<p></p>
<a name=option.activatecommand></a>
<dl><dt> <strong>activatecommand
</strong></dt><dd>
If this is callable, it will be called whenever the megawidget is
activated by a call to <code>activate()</code>. The default is <strong>None</strong>.</p>
</dd></dl>
<a name=option.deactivatecommand></a>
<dl><dt> <strong>deactivatecommand
</strong></dt><dd>
If this is callable, it will be called whenever the megawidget is
deactivated by a call to <code>deactivate()</code>. The default is <strong>None</strong>.</p>
</dd></dl>
<a name=option.master></a>
<dl><dt> <strong>master
</strong></dt><dd>
This is used by the <code>activate()</code> method to control whether the
window is made <em>transient</em> during modal dialogs. See the
<code>activate()</code> method. The default is <strong>None</strong>.</p>
</dd></dl>
<a name=option.title></a>
<dl><dt> <strong>title
</strong></dt><dd>
This is the title that the window manager displays in the title
bar of the window. The default is <strong>None</strong>.</p>
</dd></dl>
</dd>
<dt> <h3>Components</h3></dt><dd>
Components created by this megawidget and its base
classes are described below.<p></p>
<a name=component.hull></a>
<dl><dt> <strong>hull
</strong></dt><dd>
This acts as the body for the entire megawidget. Other components
are created as children of the hull to further specialise this
class. By default, this component is a Tkinter.Toplevel.</p>
</dd></dl>
</dd>
<a name=methods></a>
<dt> <h3>Methods</h3></dt><dd>
Only methods specific to this megawidget are described below.
For a description of its inherited methods, see the
manual for its base class
<strong><a href="MegaArchetype.html#methods">Pmw.MegaArchetype</a></strong>.
In addition, methods from the
<strong>Tkinter.Toplevel</strong> class
are forwarded by this megawidget to the
<strong>hull</strong> component.
<p></p>
<a name=method.activate></a>
<dl><dt> <strong>activate</strong>(<em>globalMode</em> = <strong>0</strong>, <em>geometry</em> = <strong>'centerscreenfirst'</strong>)</dt><dd>
Display the window as a modal dialog. This means that all mouse
and keyboard events go to this window and no other windows can
receive any events. If you do not want to restrict mouse and
keyboard events to this window, use the <code>show()</code> method instead.</p>
<p> If the BLT extension to Tk is present, a busy cursor will be
displayed on other toplevel windows, using <code>Pmw.showbusycursor()</code>.</p>
<p> The <code>activate()</code> method does not return until the <code>deactivate()</code>
method is called, when the window is withdrawn, the grab released
and the result returned.</p>
<p> If <em>globalMode</em> is false, the window will grab control of the
pointer and keyboard, preventing any events from being delivered
to any other toplevel windows within the application. If
<em>globalMode</em> is true, the grab will prevent events from being
delivered to any other toplevel windows regardless of application.
Global grabs should be used sparingly, if at all.</p>
<p> If <em>globalMode</em> is <strong>'nograb'</strong>, then no grab is performed. If BLT
is present, this will allow mouse and keyboard events to be
received by other windows whose <strong>exclude</strong> busycursor attribute has
been set to true by a call to <code>Pmw.setbusycursorattributes()</code>.
Note that if <strong>'nograb'</strong> is used and BLT is not present, then <em>all</em>
other windows will receive mouse and keyboard events. This is
because, in plain Tk, there is no way to specify that two windows
(only) receive events. If your application may be used without
BLT, then do not use <strong>'nograb'</strong>.</p>
<p> When the window is displayed, it is positioned on the screen
according to <em>geometry</em> which may be one of:</p>
<dl><dt><strong>centerscreenfirst</strong></dt><dd>The window will be centered the first time it is activated.
On subsequent activations it will be positioned in the same
position as the last time it was displayed, even if it has
been moved by the user.<p></p>
</dd>
<dt><strong>centerscreenalways</strong></dt><dd>The window will be be centered on the screen (halfway across
and one third down).<p></p>
</dd>
<dt><strong>first</strong> + <em>spec</em></dt><dd>It is assumed that the rest of the argument (after <strong>'first'</strong>)
is a standard geometry specification. The window will be
positioned using this specification the first time it is
activated. On subsequent activations it will be positioned in
the same position as the last time it was displayed, even if
it has been moved by the user. For example,
<code>geometry = first+100+100</code> will initially display the window
at position (100,100). Other calls to <code>activate()</code> will not
change the previous position of the window.<p></p>
</dd>
<dt><em>spec</em></dt><dd>This is a standard geometry specification. The window will be
be positioned using this specification.<p></p>
</dd></dl>
<p> If the <strong>BLT</strong> Tcl extension library is present, a <strong>clock</strong> cursor
will be displayed until the window is deactivated.</p>
<p> If the <strong>activatecommand</strong> option is callable, it is called just
before the window begins to wait for the result.</p>
<p> If the <strong>master</strong> option is not <strong>None</strong>, the window will become a
transient window of <strong>master</strong>, which should be a toplevel window.
If <strong>master</strong> has the special value of <strong>'parent'</strong>, the master is the
toplevel window of the window's parent.</p>
</dd></dl>
<a name=method.active></a>
<dl><dt> <strong>active</strong>()</dt><dd>
Return true if the megawidget is currently active (that is,
<code>activate()</code> is currently waiting for a result to be passed to it
by a call to <code>deactivate()</code>).</p>
</dd></dl>
<a name=method.deactivate></a>
<dl><dt> <strong>deactivate</strong>(<em>result</em> = <strong>None</strong>)</dt><dd>
This should be called while a call to <code>activate()</code> is waiting. It
will withdraw the window, release the grab and cause the
<code>activate()</code> call to return with the value of <em>result</em>.</p>
<p> If the <strong>deactivatecommand</strong> option is callable, it is called just
before the <code>deactivate()</code> method returns.</p>
</dd></dl>
<a name=method.destroy></a>
<dl><dt> <strong>destroy</strong>()</dt><dd>
Destroy the <strong>hull</strong> component widget, including all of its
children. If the megawidget is currently active, deactivate it.</p>
</dd></dl>
<a name=method.show></a>
<dl><dt> <strong>show</strong>(<em>master</em> = <strong>None</strong>)</dt><dd>
Make the window visible. This raises or deiconifies the toplevel
window. If the window has previously been shown it will remain in
the same position. This means that calling <code>withdraw()</code> then
<code>show()</code> will not move the window, whereas calling <code>withdraw()</code>
then <code>deiconify()</code> may change the window's position. (This may
depend on the behaviour of the window manager.)</p>
</dd></dl>
<a name=method.userdeletefunc></a>
<dl><dt> <strong>userdeletefunc</strong>(<em>func</em> = <strong>None</strong>)</dt><dd>
If <em>func</em> is <strong>None</strong>, return the function that will be called
when the window is deleted by the window manager while being
displayed normally. If <em>func</em> is not <strong>None</strong>, set this function to
<em>func</em>. By default, the function is <code>self.destroy</code>.</p>
</dd></dl>
<a name=method.usermodaldeletefunc></a>
<dl><dt> <strong>usermodaldeletefunc</strong>(<em>func</em> = <strong>None</strong>)</dt><dd>
If <em>func</em> is <strong>None</strong>, return the function that will be called
when the window is deleted by the window manager while it is
active (ie: when being used as a modal dialog). If <em>func</em> is not
<strong>None</strong>, set this function to <em>func</em>. By default, the function is
<code>self.deactivate</code>.</p>
</dd></dl>
</dd>
</dl>
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Pmw 1.3 -
7 Aug 2007
- <a href="index.html">Home</a>
<br>Manual page last reviewed: 22 May 1998
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