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container(n) BLT Built-In Commands container(n)
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NAME
container - Widget to contain a foreign window.
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SYNOPSIS
container pathName ?options?
DESCRIPTION
The container widget lets you embed an X11 window from a foreign application into your Tk
application. The foreign window is reparented inside of the widget. You can then place
and arrange the container just as you would any Tk widget.
INTRODUCTION
Notebooks are a popular graphical paradigm. They allow you to organize many windows in a
single widget. For example, you might have an application the displays several X-Y graphs
at the same time. Typically, you can't pack the graphs into the same frame because they
are too large. The other alternative is to pack the graphs into several toplevel widgets,
allowing them to overlap on the screen. The problem is that all the different toplevel
windows clutter the screen and are difficult to manage.
The container widget lets organize your application by displaying each graph as a page in
a folder of a notebook. Only one page is visible at a time. When you click on a tab, the
folder (graph) corresponding to the tab is displayed in the container widget. The con-
tainer also lets you temporarily tear pages out of the notebook into a separate toplevel
widget, and put them back in the container later. For example, you could compare two
graphs side-by-side by tearing them out, and then replace them when you are finished.
A container may contain an unlimited number of folders. If there are too many tabs to
view, you can arrange them as multiple tiers or scroll the tabs. The container uses the
conventional Tk scrollbar syntax, so you can attach a scrollbar too.
EXAMPLE
You create a container widget with the container command.
# Create a new container
container .c
A new Tcl command .c is also created. This command can be used to query and modify the
container. For example, to change the default borderwidth, you use the new command and
the container's configure operation.
# Change the default font.
.c configure -borderwidth 2
You can then add folders using the insert operation.
# Create a new folder "f1"
.c coinsert 0 "f1"
This inserts the new tab named "f1" into the container. The index 0 indicates location to
insert the new tab. You can also use the index end to append a tab to the end of the con-
tainer. By default, the text of the tab is the name of the tab. You can change this by
configuring the -text option.
# Change the label of "f1"
.ts tab configure "f1" -label "Tab #1"
The insert operation lets you add one or more folders at a time.
.ts insert end "f2" -label "Tab #2" "f3" "f4"
The tab on each folder contains a label. A label may display both an image and a text
string. You can reconfigure the tab's attributes (foreground/background colors, font,
rotation, etc) using the tab configure operation.
# Add an image to the label of "f1"
set image [image create photo -file stopsign.gif]
.ts tab configure "f1" -image $image
.ts tab configure "f2" -rotate 90
Each folder may contain an embedded widget to represent its contents. The widget to be
embedded must be a child of the container widget. Using the -window option, you specify
the name of widget to be embedded. But don't pack the widget, the container takes care of
placing and arranging the widget for you.
graph .ts.graph
.ts tab configure "f1" -window ".ts.graph" \
-fill both -padx 0.25i -pady 0.25i
The size of the folder is determined the sizes of the Tk widgets embedded inside each
folder. The folder will be as wide as the widest widget in any folder. The tallest deter-
mines the height. You can use the tab's -pagewidth and -pageheight options override this.
Other options control how the widget appears in the folder. The -fill option says that
you wish to have the widget stretch to fill the available space in the folder.
.ts tab configure "f1" -fill both -padx 0.25i -pady 0.25i
Now when you click the left mouse button on "f1", the graph will be displayed in the
folder. It will be automatically hidden when another folder is selected. If you click on
the right mouse button, the embedded widget will be moved into a toplevel widget of its
own. Clicking again on the right mouse button puts it back into the folder.
If you want to share a page between two different folders, the -command option lets you
specify a Tcl command to be invoked whenever the folder is selected. You can reset the
-window option for the tab whenever it's clicked.
.ts tab configure "f2" -command {
.ts tab configure "f2" -window ".ts.graph"
}
.ts tab configure "f1" -command {
.ts tab configure "f1" -window ".ts.graph"
}
If you have many folders, you may wish to stack tabs in multiple tiers. The container's
-tiers option requests a maximum number of tiers. The default is one tier.
.ts configure -tiers 2
If the tabs can fit in less tiers, the widget will use that many. Whenever there are more
tabs than can be displayed in the maximum number of tiers, the container will automati-
cally let you scroll the tabs. You can even attach a scrollbar to the container.
.ts configure -scrollcommand { .sbar set } -scrollincrement 20
.sbar configure -orient horizontal -command { .ts view }
By default tabs are along the top of the container from left to right. But tabs can be
placed on any side of the container using the -side option.
# Arrange tabs along the right side of the container.
.ts configure -side right -rotate 270
SYNTAX
The container command creates a new window using the pathName argument and makes it into a
container widget.
container pathName ?option value?...
Additional options may be specified on the command line or in the option database to con-
figure aspects of the container such as its colors, font, text, and relief. The container
command returns its pathName argument. At the time this command is invoked, there must
not exist a window named pathName, but pathName's parent must exist.
When first created, a new container contains no tabs. Tabs are added or deleted using
widget operations described below. It is not necessary for all the tabs to be displayed in
the container window at once; commands described below may be used to change the view in
the window. Containers allow scrolling of tabs using the -scrollcommand option. They
also support scanning (see the scan operation). Tabs may be arranged along any side of
the container window using the -side option.
The size of the container window is determined the number of tiers of tabs and the sizes
of the Tk widgets embedded inside each folder. The widest widget determines the width of
the folder. The tallest determines the height. If no folders contain an embedded widget,
the size is determined solely by the size of the tabs.
You can override either dimension with the container's -width and -height options.
CONTAINER OPERATIONS
All container operations are invoked by specifying the widget's pathname, the operation,
and any arguments that pertain to that operation. The general form is:
pathName operation ?arg arg ...?
Operation and the args determine the exact behavior of the command. The following opera-
tions are available for container widgets:
pathName cget option
Returns the current value of the configuration option given by option. Option may
have any of the values accepted by the configure operation described below.
pathName configure ?option? ?value option value ...?
Query or modify the configuration options of the widget. If no option is speci-
fied, returns a list describing all the available options for pathName (see Tk_Con-
figureInfo for information on the format of this list). If option is specified
with no value, then the command returns a list describing the one named option
(this list will be identical to the corresponding sublist of the value returned if
no option is specified). If one or more option-value pairs are specified, then the
command modifies the given widget option(s) to have the given value(s); in this
case the command returns an empty string. Option and value are described below:
-background color
Sets the border color of the container.
-borderwidth pixels
Sets the width of the 3-D border around the outside edge of the widget. The
-relief option determines how the border is to be drawn. The default is 2.
-command pattern
Specifies to search for a window whose WM_COMMAND property matches the given
pattern. If no windows, or more than one window, matches the pattern, an
error is generated. If pattern is the empty string, then no command search
is performed. The default is "".
-cursor cursor
Specifies the widget's cursor. The default cursor is "".
-height pixels
Specifies the requested height of widget. If pixels is 0, then the height
is height the embedded window plus the specified borderwidth. The default is
0.
-highlightbackground color
Sets the color to display in the traversal highlight region when the con-
tainer does not have the input focus.
-highlightcolor color
Sets the color to use for the traversal highlight rectangle that is drawn
around the widget when it has the input focus. The default is black.
-highlightthickness pixels
Sets the width of the highlight rectangle to draw around the outside of the
widget when it has the input focus. Pixels is a non-negative value and may
have any of the forms acceptable to Tk_GetPixels. If the value is zero, no
focus highlight is drawn around the widget. The default is 2.
-name pattern
Specifies to search for a window whose WM_NAME property matches the given
pattern. If no windows, or more than one window, matches the pattern, an
error is generated. If pattern is the empty string, then no name search is
performed. The default is "".
-relief relief
Specifies the 3-D effect for the container widget. Relief specifies how the
container should appear relative to widget that it is packed into; for exam-
ple, raised means the container should appear to protrude. The default is
sunken.
-takefocus focus
Provides information used when moving the focus from window to window via
keyboard traversal (e.g., Tab and Shift-Tab). If focus is 0, this means
that this window should be skipped entirely during keyboard traversal. 1
means that the this window should always receive the input focus. An empty
value means that the traversal scripts decide whether to focus on the win-
dow. The default is 1.
-width pixels
Specifies the requested width of the widget. If pixels is 0, then the width
is the width the embedded window and the specified borderwidth. The default
is 0.
-window id
Specifies the foreign embedded using its X window id.
pathName find -command|-name pattern
Searches for all windows that match the given pattern. If the -command switch is
given, all windows whose WWM_COMMAND property match pattern are returned in a list.
If the -name switch is given, all windows whose WWM_NAME property match pattern are
returned in a list. The list returned will contains pairs of the window id and the
matching property.
KEYWORDS
container, widget
BLT 2.4 container(n)
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On Apache
Under GNU General Public License
2012-05-25 15:21 @38.107.179.239 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)