RadioButtonLib — Plan9Basic Documentation

RadioButtonLib — Radio Button Control Library

Complete functionality for creating and managing radio button controls in Plan9Basic. Radio buttons allow users to select one option from a mutually exclusive group of choices. Features include named groups for multiple independent selections on the same form, full font styling, alignment and margins, drag support, and a comprehensive event system. 110 functions.

Category	Count	Description
Error Handling	4	radiobutton_error, errormsg$, strerror$, clearerror
Creation & Destruction	5	radiobutton# (4 overloads), radiobutton_free
Checked State	2	radiobutton_ischecked (get/set)
Group Name	2	radiobutton_groupname (get/set)
Text & Font	16	text, fontfamily, fontsize, fontcolor, bold, italic, underline, strikeout (get/set)
Position & Size	14	x, y, width, height (get/set), bounds#, move#, size#
Alignment & Margins	12	align (get/set), margin#, margins#, marginleft/top/right/bottom (get/set)
Visibility & State	6	visible, enabled, opacity (get/set)
Focus	5	isfocused, setfocus#, resetfocus#, taborder (get/set)
Interaction	6	canfocus, hittest, dragmode (get/set)
Tag & Parent	6	tag (get/set), parent# (get/set), bringtofront#, sendtoback#
Events	32	15 event types × set/get + clearcallbacks#

Cross-Platform Support

Platform	Status	Notes
Windows	✅ Full Support	Win32/Win64
Linux	✅ Full Support	GTK-based
Android	✅ Full Support	Mobile-optimized

Error Handling

Function	Signature	Description
`radiobutton_error()`	`radiobutton_error@`	Last error code (0 = no error)
`radiobutton_errormsg$()`	`radiobutton_errormsg$@`	Last error message as string
`radiobutton_strerror$(code)`	`radiobutton_strerror$@n`	Description for a given error code
`radiobutton_clearerror()`	`radiobutton_clearerror@`	Clear the error state

Numeric Values Reference

Control Alignment `radiobutton_align#`

Value	Description
0	None (absolute positioning)
1	Top
2	Left
3	Right
4	Bottom
9	Client (fill parent)

Drag Mode `radiobutton_dragmode#`

Value	Description
0	None (default)
1	Automatic drag enabled

Creation & Destruction

Function	Signature	Description
`radiobutton#(parent#)`	`radiobutton#@#`	Create with default size
`radiobutton#(parent#, text$)`	`radiobutton#@#$`	Create with label text
`radiobutton#(parent#, x, y, w, h)`	`radiobutton#@#nnnn`	Create at position and size
`radiobutton#(parent#, text$, x, y, w, h)`	`radiobutton#@#$nnnn`	Create with text, position, and size
`radiobutton_free(rb#)`	`radiobutton_free@#`	Destroy radio button and release resources

╯ plan9basic─◻✕
' Common creation patterns
let rb# = radiobutton#(frm#, "Option A")

' With full positioning
let rb# = radiobutton#(frm#, "Option B", 20, 50, 150, 22)

' Cleanup
radiobutton_free(rb#)

Checked State

Function	Signature	Description
`radiobutton_ischecked(rb#)`	`radiobutton_ischecked@#`	Get checked state (0=unchecked, 1=checked)
`radiobutton_ischecked#(rb#, n)`	`radiobutton_ischecked#@#n`	Set checked state

╯ plan9basic─◻✕
' Set default selection
radiobutton_ischecked#(rbOption1#, 1)

' Check which is selected
if radiobutton_ischecked(rbOption1#) = 1 then
    println "Option 1 selected"
endif

ⓘ Note: When you check a radio button, all other radio buttons in the same group (same parent and group name) are automatically unchecked. This is the standard mutually-exclusive behavior.

Group Name

Function	Signature	Description
`radiobutton_groupname$(rb#)`	`radiobutton_groupname$@#`	Get the group name
`radiobutton_groupname#(rb#, name$)`	`radiobutton_groupname#@#$`	Set the group name

Radio buttons with the same GroupName are mutually exclusive within their parent container. By default, all radio buttons on the same parent are in one unnamed group. Use named groups to create independent sets of choices on the same form.

╯ plan9basic─◻✕
' Two independent groups on the same form

' Group 1: Color selection
radiobutton_groupname#(rbRed#, "color")
radiobutton_groupname#(rbGreen#, "color")
radiobutton_groupname#(rbBlue#, "color")

' Group 2: Size selection
radiobutton_groupname#(rbSmall#, "size")
radiobutton_groupname#(rbMedium#, "size")
radiobutton_groupname#(rbLarge#, "size")

' Selecting "Red" only deselects Green/Blue, not size options

⚠ Warning: Without radiobutton_groupname#, all radio buttons on the same parent form act as one group. Selecting any one will deselect all others. Use named groups whenever you have multiple questions or categories on the same form.

Text & Font

Function	Signature	Description
`radiobutton_text$(rb#)`	`radiobutton_text$@#`	Get label text
`radiobutton_text#(rb#, text$)`	`radiobutton_text#@#$`	Set label text
`radiobutton_fontfamily$(rb#)`	`radiobutton_fontfamily$@#`	Get font family name
`radiobutton_fontfamily#(rb#, family$)`	`radiobutton_fontfamily#@#$`	Set font family
`radiobutton_fontsize(rb#)`	`radiobutton_fontsize@#`	Get font size
`radiobutton_fontsize#(rb#, size)`	`radiobutton_fontsize#@#n`	Set font size
`radiobutton_fontcolor$(rb#)`	`radiobutton_fontcolor$@#`	Get font color
`radiobutton_fontcolor#(rb#, color$)`	`radiobutton_fontcolor#@#$`	Set font color
`radiobutton_bold(rb#)`	`radiobutton_bold@#`	Get bold state (0/1)
`radiobutton_bold#(rb#, n)`	`radiobutton_bold#@#n`	Set bold (0/1)
`radiobutton_italic(rb#)`	`radiobutton_italic@#`	Get italic state (0/1)
`radiobutton_italic#(rb#, n)`	`radiobutton_italic#@#n`	Set italic (0/1)
`radiobutton_underline(rb#)`	`radiobutton_underline@#`	Get underline state (0/1)
`radiobutton_underline#(rb#, n)`	`radiobutton_underline#@#n`	Set underline (0/1)
`radiobutton_strikeout(rb#)`	`radiobutton_strikeout@#`	Get strikeout state (0/1)
`radiobutton_strikeout#(rb#, n)`	`radiobutton_strikeout#@#n`	Set strikeout (0/1)

╯ plan9basic─◻✕
radiobutton_fontfamily#(rb#, "Arial")
radiobutton_fontsize#(rb#, 14)
radiobutton_fontcolor#(rb#, "#333333")
radiobutton_bold#(rb#, 1)

Position & Size

Function	Signature	Description
`radiobutton_x(rb#)`	`radiobutton_x@#`	Get X position
`radiobutton_x#(rb#, x)`	`radiobutton_x#@#n`	Set X position
`radiobutton_y(rb#)`	`radiobutton_y@#`	Get Y position
`radiobutton_y#(rb#, y)`	`radiobutton_y#@#n`	Set Y position
`radiobutton_width(rb#)`	`radiobutton_width@#`	Get width
`radiobutton_width#(rb#, w)`	`radiobutton_width#@#n`	Set width
`radiobutton_height(rb#)`	`radiobutton_height@#`	Get height
`radiobutton_height#(rb#, h)`	`radiobutton_height#@#n`	Set height
`radiobutton_bounds#(rb#, x, y, w, h)`	`radiobutton_bounds#@#nnnn`	Set position and size in one call
`radiobutton_move#(rb#, x, y)`	`radiobutton_move#@#nn`	Set position only
`radiobutton_size#(rb#, w, h)`	`radiobutton_size#@#nn`	Set size only

╯ plan9basic─◻✕
' Typical radio button layout
let rb1# = radiobutton#(frm#, "Option A", 20, 50, 150, 22)
let rb2# = radiobutton#(frm#, "Option B", 20, 77, 150, 22)
let rb3# = radiobutton#(frm#, "Option C", 20, 104, 150, 22)

ⓘ Note: Keep 25–30 pixels of vertical spacing between radio buttons for comfortable reading. Ensure the width is large enough to display the full label text.

Alignment & Margins

Function	Signature	Description
`radiobutton_align(rb#)`	`radiobutton_align@#`	Get control alignment mode
`radiobutton_align#(rb#, n)`	`radiobutton_align#@#n`	Set control alignment (0=none, 1=top, 2=left, 3=right, 4=bottom, 9=client)
`radiobutton_margin#(rb#, n)`	`radiobutton_margin#@#n`	Set uniform margin on all four sides
`radiobutton_margins#(rb#, l, t, r, b)`	`radiobutton_margins#@#nnnn`	Set individual margins (left, top, right, bottom)
`radiobutton_marginleft(rb#)`	`radiobutton_marginleft@#`	Get left margin
`radiobutton_marginleft#(rb#, n)`	`radiobutton_marginleft#@#n`	Set left margin
`radiobutton_margintop(rb#)`	`radiobutton_margintop@#`	Get top margin
`radiobutton_margintop#(rb#, n)`	`radiobutton_margintop#@#n`	Set top margin
`radiobutton_marginright(rb#)`	`radiobutton_marginright@#`	Get right margin
`radiobutton_marginright#(rb#, n)`	`radiobutton_marginright#@#n`	Set right margin
`radiobutton_marginbottom(rb#)`	`radiobutton_marginbottom@#`	Get bottom margin
`radiobutton_marginbottom#(rb#, n)`	`radiobutton_marginbottom#@#n`	Set bottom margin

╯ plan9basic─◻✕
' Stack radio buttons at the top of a panel
radiobutton_align#(rb1#, 1)    ' Align top
radiobutton_margins#(rb1#, 10, 5, 0, 0)

Visibility & State

Function	Signature	Description
`radiobutton_visible(rb#)`	`radiobutton_visible@#`	Get visibility (0/1)
`radiobutton_visible#(rb#, n)`	`radiobutton_visible#@#n`	Set visibility (0=hidden, 1=visible)
`radiobutton_enabled(rb#)`	`radiobutton_enabled@#`	Get enabled state (0/1)
`radiobutton_enabled#(rb#, n)`	`radiobutton_enabled#@#n`	Set enabled state (0=disabled/grayed, 1=enabled)
`radiobutton_opacity(rb#)`	`radiobutton_opacity@#`	Get opacity (0.0–1.0)
`radiobutton_opacity#(rb#, value)`	`radiobutton_opacity#@#n`	Set opacity (0.0=transparent, 1.0=opaque)

Focus

Function	Signature	Description
`radiobutton_isfocused(rb#)`	`radiobutton_isfocused@#`	Is this radio button focused? (0/1)
`radiobutton_setfocus#(rb#)`	`radiobutton_setfocus#@#`	Give keyboard focus
`radiobutton_resetfocus#(rb#)`	`radiobutton_resetfocus#@#`	Release focus
`radiobutton_taborder(rb#)`	`radiobutton_taborder@#`	Get tab order index
`radiobutton_taborder#(rb#, n)`	`radiobutton_taborder#@#n`	Set tab order index

Interaction

Function	Signature	Description
`radiobutton_canfocus(rb#)`	`radiobutton_canfocus@#`	Get whether radio button can receive focus (0/1)
`radiobutton_canfocus#(rb#, n)`	`radiobutton_canfocus#@#n`	Set whether radio button can receive focus
`radiobutton_hittest(rb#)`	`radiobutton_hittest@#`	Get hit-test state (0/1)
`radiobutton_hittest#(rb#, n)`	`radiobutton_hittest#@#n`	Enable/disable mouse hit testing
`radiobutton_dragmode(rb#)`	`radiobutton_dragmode@#`	Get drag mode (0=none, 1=automatic)
`radiobutton_dragmode#(rb#, n)`	`radiobutton_dragmode#@#n`	Set drag mode

Tag & Parent

Function	Signature	Description
`radiobutton_tag(rb#)`	`radiobutton_tag@#`	Get user-defined integer tag
`radiobutton_tag#(rb#, n)`	`radiobutton_tag#@#n`	Set user-defined integer tag
`radiobutton_parent#(rb#)`	`radiobutton_parent#@#`	Get parent control pointer
`radiobutton_parent#(rb#, parent#)`	`radiobutton_parent#@##`	Move radio button to a different parent
`radiobutton_bringtofront#(rb#)`	`radiobutton_bringtofront#@#`	Bring to front of Z-order
`radiobutton_sendtoback#(rb#)`	`radiobutton_sendtoback#@#`	Send to back of Z-order

Events

Each event has a setter (radiobutton_onXXX#(rb#, func$)) and a getter (radiobutton_onXXX$(rb#)). Use radiobutton_clearcallbacks#(rb#) to disconnect all callbacks at once.

State & Focus Events

Event Setter	Getter	Callback Signature
`radiobutton_onchange#(rb#, func$)`	`radiobutton_onchange$(rb#)`	`function name(sender#)`
`radiobutton_onclick#(rb#, func$)`	`radiobutton_onclick$(rb#)`	`function name(sender#)`
`radiobutton_ondblclick#(rb#, func$)`	`radiobutton_ondblclick$(rb#)`	`function name(sender#)`
`radiobutton_onenter#(rb#, func$)`	`radiobutton_onenter$(rb#)`	`function name(sender#)`
`radiobutton_onexit#(rb#, func$)`	`radiobutton_onexit$(rb#)`	`function name(sender#)`

ⓘ Note: OnChange is the primary event for radio buttons. It fires when the selection changes. Assign the same callback to all buttons in a group to handle the change centrally.

Keyboard Events

Event Setter	Getter	Callback Signature
`radiobutton_onkeydown#(rb#, func$)`	`radiobutton_onkeydown$(rb#)`	`function name(sender#, key, keychar$, shift$)`
`radiobutton_onkeyup#(rb#, func$)`	`radiobutton_onkeyup$(rb#)`	`function name(sender#, key, keychar$, shift$)`

Mouse Events

Event Setter	Getter	Callback Signature
`radiobutton_onmousedown#(rb#, func$)`	`radiobutton_onmousedown$(rb#)`	`function name(sender#, button, x, y, shift$)`
`radiobutton_onmouseup#(rb#, func$)`	`radiobutton_onmouseup$(rb#)`	`function name(sender#, button, x, y, shift$)`
`radiobutton_onmousemove#(rb#, func$)`	`radiobutton_onmousemove$(rb#)`	`function name(sender#, x, y, shift$)`
`radiobutton_onmouseenter#(rb#, func$)`	`radiobutton_onmouseenter$(rb#)`	`function name(sender#)`
`radiobutton_onmouseleave#(rb#, func$)`	`radiobutton_onmouseleave$(rb#)`	`function name(sender#)`

Other Events

Event Setter	Getter	Callback Signature
`radiobutton_onresize#(rb#, func$)`	`radiobutton_onresize$(rb#)`	`function name(sender#)`
`radiobutton_ondragenter#(rb#, func$)`	`radiobutton_ondragenter$(rb#)`	`function name(sender#)`
`radiobutton_ondragover#(rb#, func$)`	`radiobutton_ondragover$(rb#)`	`function name(sender#)`
`radiobutton_ondragdrop#(rb#, func$)`	`radiobutton_ondragdrop$(rb#)`	`function name(sender#)`
`radiobutton_ondragleave#(rb#, func$)`	`radiobutton_ondragleave$(rb#)`	`function name(sender#)`
`radiobutton_clearcallbacks#(rb#)`	—	Disconnect all event callbacks

Complete Examples

Survey Form (Multiple Groups)

╯ survey.bas─◻✕
function OnSubmit(sender#) local age$, sat$
    age$ = "Not selected"
    if radiobutton_ischecked(rbAge1#) = 1 then age$ = "Under 18"
    if radiobutton_ischecked(rbAge2#) = 1 then age$ = "18-35"
    if radiobutton_ischecked(rbAge3#) = 1 then age$ = "36-55"
    if radiobutton_ischecked(rbAge4#) = 1 then age$ = "Over 55"

    sat$ = "Not selected"
    if radiobutton_ischecked(rbSat1#) = 1 then sat$ = "Very satisfied"
    if radiobutton_ischecked(rbSat2#) = 1 then sat$ = "Satisfied"
    if radiobutton_ischecked(rbSat3#) = 1 then sat$ = "Neutral"
    if radiobutton_ischecked(rbSat4#) = 1 then sat$ = "Dissatisfied"

    label_text#(lblResult#, "Age: " + age$ + " | Satisfaction: " + sat$)
endfunction

let frm# = form#("Customer Survey", 350, 300)
form_position#(frm#, 4)

' Question 1: Age group
let lblAge# = label#(frm#, "Your age group:")
label_move#(lblAge#, 20, 20)
label_bold#(lblAge#, 1)

let rbAge1# = radiobutton#(frm#, "Under 18", 20, 45, 120, 22)
let rbAge2# = radiobutton#(frm#, "18-35", 20, 70, 120, 22)
let rbAge3# = radiobutton#(frm#, "36-55", 20, 95, 120, 22)
let rbAge4# = radiobutton#(frm#, "Over 55", 20, 120, 120, 22)
radiobutton_groupname#(rbAge1#, "age")
radiobutton_groupname#(rbAge2#, "age")
radiobutton_groupname#(rbAge3#, "age")
radiobutton_groupname#(rbAge4#, "age")

' Question 2: Satisfaction
let lblSat# = label#(frm#, "Satisfaction level:")
label_move#(lblSat#, 180, 20)
label_bold#(lblSat#, 1)

let rbSat1# = radiobutton#(frm#, "Very satisfied", 180, 45, 150, 22)
let rbSat2# = radiobutton#(frm#, "Satisfied", 180, 70, 150, 22)
let rbSat3# = radiobutton#(frm#, "Neutral", 180, 95, 150, 22)
let rbSat4# = radiobutton#(frm#, "Dissatisfied", 180, 120, 150, 22)
radiobutton_groupname#(rbSat1#, "satisfaction")
radiobutton_groupname#(rbSat2#, "satisfaction")
radiobutton_groupname#(rbSat3#, "satisfaction")
radiobutton_groupname#(rbSat4#, "satisfaction")

let btnSubmit# = button#(frm#, "Submit", 125, 200, 100, 35)
button_onclick#(btnSubmit#, "OnSubmit")

let lblResult# = label#(frm#, "")
label_bounds#(lblResult#, 20, 250, 310, 40)

form_show(frm#)

while form_visible(frm#) = 1
    processmessages()
end while

Theme Selector

╯ theme.bas─◻✕
function OnThemeChange(sender#)
    if radiobutton_ischecked(rbLight#) = 1 then
        label_text#(lblPreview#, "Preview: Light theme")
    elseif radiobutton_ischecked(rbDark#) = 1 then
        label_text#(lblPreview#, "Preview: Dark theme")
    elseif radiobutton_ischecked(rbSystem#) = 1 then
        label_text#(lblPreview#, "Preview: System default")
    endif
endfunction

let frm# = form#("Theme Settings", 280, 200)
form_position#(frm#, 4)

let lblTheme# = label#(frm#, "Select theme:")
label_move#(lblTheme#, 20, 20)

let rbLight# = radiobutton#(frm#, "Light", 20, 50, 100, 22)
let rbDark# = radiobutton#(frm#, "Dark", 20, 80, 100, 22)
let rbSystem# = radiobutton#(frm#, "System Default", 20, 110, 150, 22)
radiobutton_ischecked#(rbLight#, 1)

radiobutton_onchange#(rbLight#, "OnThemeChange")
radiobutton_onchange#(rbDark#, "OnThemeChange")
radiobutton_onchange#(rbSystem#, "OnThemeChange")

let lblPreview# = label#(frm#, "Preview: Light theme")
label_move#(lblPreview#, 20, 150)
label_fontsize#(lblPreview#, 12)

form_show(frm#)

while form_visible(frm#) = 1
    processmessages()
end while

Quiz with Scoring

╯ quiz.bas─◻✕
function OnCheck(sender#) local score
    score = 0
    if radiobutton_ischecked(rbQ1B#) = 1 then score = score + 1
    if radiobutton_ischecked(rbQ2B#) = 1 then score = score + 1
    label_text#(lblScore#, "Score: " + str$(score) + " / 2")
endfunction

let frm# = form#("Quiz", 400, 350)
form_position#(frm#, 4)

' Question 1
let lblQ1# = label#(frm#, "1. What is the capital of France?")
label_move#(lblQ1#, 20, 20)
label_bold#(lblQ1#, 1)

let rbQ1A# = radiobutton#(frm#, "London", 30, 45, 150, 22)
let rbQ1B# = radiobutton#(frm#, "Paris", 30, 70, 150, 22)
let rbQ1C# = radiobutton#(frm#, "Berlin", 30, 95, 150, 22)
radiobutton_groupname#(rbQ1A#, "q1")
radiobutton_groupname#(rbQ1B#, "q1")
radiobutton_groupname#(rbQ1C#, "q1")

' Question 2
let lblQ2# = label#(frm#, "2. What is 7 x 8?")
label_move#(lblQ2#, 20, 130)
label_bold#(lblQ2#, 1)

let rbQ2A# = radiobutton#(frm#, "54", 30, 155, 150, 22)
let rbQ2B# = radiobutton#(frm#, "56", 30, 180, 150, 22)
let rbQ2C# = radiobutton#(frm#, "58", 30, 205, 150, 22)
radiobutton_groupname#(rbQ2A#, "q2")
radiobutton_groupname#(rbQ2B#, "q2")
radiobutton_groupname#(rbQ2C#, "q2")

let btnCheck# = button#(frm#, "Check Answers", 140, 250, 120, 35)
button_onclick#(btnCheck#, "OnCheck")

let lblScore# = label#(frm#, "")
label_move#(lblScore#, 20, 300)
label_fontsize#(lblScore#, 14)

form_show(frm#)

while form_visible(frm#) = 1
    processmessages()
end while

Payment Method

╯ payment.bas─◻✕
function OnContinue(sender#) local method$
    method$ = ""
    if radiobutton_ischecked(rbCard#) = 1 then method$ = "Credit Card"
    if radiobutton_ischecked(rbPaypal#) = 1 then method$ = "PayPal"
    if radiobutton_ischecked(rbBank#) = 1 then method$ = "Bank Transfer"
    if radiobutton_ischecked(rbCash#) = 1 then method$ = "Cash on Delivery"
    println "Selected payment: " + method$
endfunction

let frm# = form#("Payment", 300, 220)
form_position#(frm#, 4)

let lblPay# = label#(frm#, "Payment method:")
label_move#(lblPay#, 20, 20)
label_bold#(lblPay#, 1)

let rbCard# = radiobutton#(frm#, "Credit Card", 20, 50, 150, 22)
let rbPaypal# = radiobutton#(frm#, "PayPal", 20, 80, 150, 22)
let rbBank# = radiobutton#(frm#, "Bank Transfer", 20, 110, 150, 22)
let rbCash# = radiobutton#(frm#, "Cash on Delivery", 20, 140, 170, 22)
radiobutton_ischecked#(rbCard#, 1)

let btnContinue# = button#(frm#, "Continue", 100, 175, 100, 35)
button_onclick#(btnContinue#, "OnContinue")

form_show(frm#)

while form_visible(frm#) = 1
    processmessages()
end while

Best Practices

Practice	Why
Use `radiobutton_groupname#` for multiple groups	Prevents all radio buttons on a form from acting as one group
Always set a default selection	Call `radiobutton_ischecked#(rb#, 1)` on one button per group
Use `radiobutton_onchange#` as the primary event	Fires only when the selection actually changes
Assign the same callback to all buttons in a group	Handle the change centrally instead of per-button
Ensure width accommodates the full label text	Short widths can clip the label
Use 25–30px vertical spacing between options	Comfortable touch and click targets
Group related options visually	Use bold labels and spacing to separate question groups

Quick Reference

Function	Signature	Description
`radiobutton_error / errormsg$ / strerror$ / clearerror`	`various`	Error handling (4)
`radiobutton#(parent#[, text$][, x, y, w, h])`	`various`	Create (4 overloads)
`radiobutton_free(rb#)`	`radiobutton_free@#`	Destroy
`radiobutton_ischecked (get/set)`	`various`	Checked state (2)
`radiobutton_groupname (get/set)`	`various`	Group name (2)
`radiobutton_text / fontfamily / fontsize / fontcolor / bold / italic / underline / strikeout`	`various`	Text & font (16)
`radiobutton_x/y/width/height (get/set) / bounds# / move# / size#`	`various`	Position & size (14)
`radiobutton_align / margin# / margins# / margin[left/top/right/bottom]`	`various`	Alignment & margins (12)
`radiobutton_visible / enabled / opacity`	`various`	Visibility & state (6)
`radiobutton_isfocused / setfocus# / resetfocus# / taborder`	`various`	Focus (5)
`radiobutton_canfocus / hittest / dragmode`	`various`	Interaction (6)
`radiobutton_tag / parent# / bringtofront# / sendtoback#`	`various`	Tag & parent (6)
`radiobutton_onchange/onclick/ondblclick/onenter/onexit/onkeydown/onkeyup/onmousedown/up/move/enter/leave/onresize/ondragenter/over/drop/leave`	`various`	Events set+get (31)
`radiobutton_clearcallbacks#`	`radiobutton_clearcallbacks#@#`	Disconnect all events

110 functions. Part of the Plan9Basic GUI library system.