Summary of the Tk Commands

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	Practical Programming in Tcl & Tk, Third Edition By Brent B. Welch
	Table of Contents
	Chapter 21.  Tk Fundamentals

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The following tables list the Tcl commands added by Tk. Table 21-1 lists commands that create widgets. There are 15 different widgets in Tk, although 4 of them are variations on a button, and 5 are devoted to different flavors of text display. Table 21-2 lists commands that manipulate widgets and provide associated functions like input focus, event binding, and geometry management. Table 21-3 lists several support procedures that implement standard dialogs, option menus, and other facilities. The page number in the table is the primary reference for the command, and there are other references in the index.

Table 21-1. Tk widget-creation commands.

Command	Pg.	Description
button	388	Create a command button.
checkbutton	392	Create a toggle button that is linked to a Tcl variable.
radiobutton	392	Create one of a set of radio buttons linked to one variable.
menubutton	396	Create a button that posts a menu.
menu	396	Create a menu.
canvas	475	Create a canvas, which supports lines, boxes, bitmaps, images, arcs, text, polygons, and embedded widgets.
label	420	Create a read-only, one-line text label.
entry	437	Create a one-line text entry widget.
message	422	Create a read-only, multiline text message.
listbox	443	Create a line-oriented, scrolling text widget.
text	453	Create a general-purpose, editable text widget.
scrollbar	429	Create a scrollbar that can be linked to another widget.
scale	425	Create a scale widget that adjusts the value of a variable.
frame	417	Create a container widget used with geometry managers.
toplevel	417	Create a frame that is a new top level window.

Table 21-2. Tk widget-manipulation commands.

Command	Pg.	Description
bell	428	Ring the terminal bell device.
bind	369	Bind a Tcl command to an event.
bindtags	371	Create binding classes and control binding inheritance.
clipboard	510	Manipulate the clipboard.
destroy	521	Delete a widget.
event	380	Define and generate virtual events.
focus	518	Control the input focus.
font	555	Set and query font attributes and measurements.
grab	520	Steal the input focus from other widgets.
grid	358	Arrange widgets into a grid with constraints.
image	542	Create and manipulate images.
lower	349	Lower a window in the stacking order.
option	409	Set and query the resources database.
pack	348	Pack a widget in the display with constraints.
place	367	Place a widget in the display with positions.
raise	349	Raise a window in the stacking order.
selection	509	Manipulate the selection.
send	562	Send a Tcl command to another Tk application.
tk	582	Query or set the application name.
tkerror	190	Handler for background errors.
tkwait	520	Wait for an event.
update	524	Update the display by going through the event loop.
winfo	576	Query window state.
wm	571	Interact with the window manager.

Table 21-3. Tk support procedures.

Command	Pg.	Description
tk_bisque	537	Install bisque family of colors.
tk_chooseColor	517	Dialog to select a color. (Tk 4.2)
tk_dialog	515	Create simple dialogs.
tk_focusFollowsMouse	518	Install mouse-tracking focus model.
tk_focusNext	519	Focus on next widget in tab order.
tk_focusPrev	519	Focus on previous widget in tab order.
tk_getOpenFile	516	Dialog to open an existing file. (Tk 4.2)
tk_getSaveFile	516	Dialog to open a new file. (Tk 4.2)
tk_messageBox	516	Message dialog. (Tk 4.2)
tk_optionMenu	398	Create an option menu.
tk_popup	398	Create a pop-up menu.
tk_setPalette	537	Set the standard color palette. (Tk 4.2)

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