[Chapter 18] 18.18 The Toplevel Widget

18.18 The Toplevel Widget

Create a toplevel widget, displayed independently from the main window with the same decoration as the window system, using the Toplevel method.

The standard configuration options that apply to Toplevel are: -background , -bg , -borderwidth , -bw , -cursor , -height , -highlightbackground , -highlightcolor , -highlightthickness , -relief , -takefocus , and -width .

Other options are:

-class => name: The class associated with the toplevel widget.
-colormap => \$window: Specifies another window to share the colormap with. You can point to another window or use the value "new" to specify a new colormap. Default is undef .
-screen => screen: The screen to place the toplevel widget on.
-visual => type n: For the X Window System, changes the depth of colors.

18.18.1 Toplevel Methods

In addition to cget and configure , the following methods are supported by the Toplevel widget. Note that since the MainWindow is a Toplevel widget, each of these methods applies to the MainWindow as well.

aspect: Returns the constraints to the aspect of the window. The four-item list returned corresponds to the minimum width, the minimum height, the maximum width, and the maximum height.
client: Assigns a name to the toplevel window.
colormapwindows: For the X Window System, passes a list of windows to the window manager that have private colormaps. Controls the WM_COLORMAP_WINDOWS property.
command: For the X Window System, returns the command used to start the application.
deiconify: Displays an iconified window.
focusmodel: Gives up the keyboard focus to another window.
frame: Returns the ID of the parent widget as a hexadecimal string.
geometry: For the X Window System, gets the geometry of the toplevel widget.
grid: Changes the size of the toplevel's grid.
group: Makes the widget the group leader of a set of related windows.
iconbitmap: Identifies a bitmap to use as an icon when the window is iconified.
iconify: Iconifies the window.
iconmask: Specifies a mask for the icon bitmap.
iconname: Assigns text to be associated with the icon.
iconposition: Specifies a position for the icon on the desktop.
iconwindow: Specifies a widget to use in place of an icon when iconified.
maxsize: Specifies the largest size for the window.
minsize: Specifies the smallest size for the window.
overrideredirect: Removes window decorations from the window.
positionfrom: Returns either "program" or "user", to tell you whether the user or window manager requested its current position.
protocol: Given one of the window managers WM_DELETE_WINDOW, WM_SAVE_YOURSELF, or WM_TAKE_FOCUS, allows you to define a callback to execute when an associated event is detected.
resizable: Takes boolean values representing whether the window can be resized in width and height, respectively.
sizefrom: Returns either "program" or "user", to tell you whether the user or window manager requested its current size.
state: Returns "normal" , "iconic" , or "withdrawn" , indicating the current state of the window.
title: Changes the title at the top of the window.
transient: Indicates to the window manager that the window is transient.
withdraw: Makes the window non-visible.