Spinner
Spinner UI component
Description
A spinner UI component allows an app user to select a numeric value from a finite
set. Use the Spinner
object to modify the appearance and behavior of a
spinner after you create it.
Creation
Create a spinner in an app using the uispinner
function.
Properties
Value
Value
— Spinner value
0 (default) | numeric value
Spinner value, specified as a numeric value.
When the app user types a value in the spinner, the value is a character vector. When the app user presses the Enter key or changes focus, MATLAB® converts the app-user-entered value to a double-precision number.
MATLAB rejects the value if:
It cannot convert the character vector to a scalar number.
The value is NaN, blank, or a complex number.
The value is a mathematical expression, such as
1+2
.The value is less than or greater than the values specified by the
Limits
property.
When MATLAB rejects the app-user-entered value,
a tooltip appears describing the value requirements. The spinner immediately
reverts to its previous value and no ValueChangedFcn
runs.
Example: 10
Data Types: double
Limits
— Minimum and maximum spinner values
[-Inf Inf]
(default) | two-element numeric array
Minimum and maximum spinner values, specified as a two-element numeric array. The first value
must be less than or equal to the second value. Set array elements to
-Inf
or Inf
to specify no minimum or no
maximum, respectively.
If you change Limits
such that Value
is less
than the new lower limit, MATLAB sets Value
to the lowest value within the new range.
For example, suppose Limits
is [0 100]
and
Value
is 20. If Limits
changes to
[50 100]
, inclusive, then MATLAB sets Value
to 50.
Similarly, if you change Limits
such that the
Value
is greater than the new upper limit, then MATLAB sets Value
to the new upper limit (assuming the
limits are inclusive).
Example: [-Inf 200]
Example: [-100
Inf]
Example: [-100 200]
Data Types: double
Step
— Quantity by which value is incremented or decremented
1
(default) | numeric scalar
Quantity by which the Value
property increments
or decrements when the app user presses the up and down arrows, respectively.
RoundFractionalValues
— Rounding of fractional values
'off'
(default) | on/off logical value
Rounding of fractional values entered by app users, specified as 'on'
or
'off'
, or as numeric or logical 1
(true
) or 0
(false
). A
value of 'on'
is equivalent to true
, and
'off'
is equivalent to false
. Thus, you can
use the value of this property as a logical value. The value is stored as an on/off
logical value of type matlab.lang.OnOffSwitchState
.
'on'
— MATLAB rounds the value if it results in a valid value and executes theValueChangedFcn
callback. If the resulting value is outside the lower or upperLimits
, then MATLAB rounds to the nearest value that falls within theLimits
and then executes the callback.'off'
— MATLAB does not round a fractional value to a whole number.
If the RoundFractionalValues
property value
changes from 'off'
to 'on'
programmatically,
then MATLAB applies these rules:
If rounding the existing value yields an integer that lies inside the limit range specified by the
Limits
property, then MATLAB rounds up the existing value.If rounding the existing value yields an integer that is less than the lower limit, then MATLAB rounds up the existing value.
If rounding the existing value yields an integer that is greater than the upper limit, then MATLAB rounds down the existing value.
If the limits are configured such that there is no valid integer in the range, then MATLAB sets the
RoundFractionalValues
property value back to'off'
and displays an error message.
ValueDisplayFormat
— Value display format
'%11.4g'
(default) | character vector | string scalar
Value display format, specified as a character vector or string scalar.
MATLAB uses sprintf
to display the value using the specified
format.
You can mix text with format operators. For example:
spin = uispinner('ValueDisplayFormat','%.0f MS/s');
The resulting spinner component looks like this:
When the app user clicks in the spinner field, the field shows the value without the text.
For a complete list of supported format operators, see sprintf
.
AllowEmpty
— Ability to clear spinner
'off'
(default) | on/off logical value
Ability to clear spinner, specified as 'on'
or
'off'
, or as numeric or logical 1
(true
) or 0
(false
). A
value of 'on'
is equivalent to true
, and
'off'
is equivalent to false
. Thus, you can
use the value of this property as a logical value. The value is stored as an on/off
logical value of type matlab.lang.OnOffSwitchState
.
'on'
— The spinner can be empty.'off'
— The spinner cannot be empty.
To create an empty spinner, specify AllowEmpty
as
'on'
and Value
as
[]
.
fig = uifigure; s = uispinner(fig, ... "AllowEmpty",'on', ... "Value",[]);
Placeholder
— Placeholder text
''
(default) | string scalar | character vector
Placeholder text, specified as a string scalar or character vector. The placeholder provides a short hint to describe the expected input. The text shows only when the spinner is empty.
To create an empty spinner with placeholder text, specify
AllowEmpty
as 'on'
and
Value
as []
.
fig = uifigure; s = uispinner(fig, ... "AllowEmpty",'on', ... "Value",[], ... "Placeholder","Enter value");
HorizontalAlignment
— Horizontal alignment of numbers within spinner
'right'
(default) | 'left'
| 'center'
Horizontal alignment of numbers within the spinner, specified as:
'right'
— Numbers align on the right side of the spinner.'left'
— Numbers align on the left side of the spinner.'center'
— Numbers align in the center of the spinner.
LowerLimitInclusive
— Lower limit inclusiveness
'on'
(default) | on/off logical value
Lower limit inclusiveness, specified as 'on'
or 'off'
,
or as numeric or logical 1
(true
) or
0
(false
). A value of 'on'
is equivalent to true
, and 'off'
is equivalent to
false
. Thus, you can use the value of this property as a logical
value. The value is stored as an on/off logical value of type matlab.lang.OnOffSwitchState
.
'on'
— Value must be equal to or greater than the lower limit.'off'
— Value must be greater than the lower limit.
UpperLimitInclusive
— Upper limit inclusiveness
'on'
(default) | on/off logical value
Upper limit inclusiveness, specified as 'on'
or 'off'
,
or as numeric or logical 1
(true
) or
0
(false
). A value of 'on'
is equivalent to true
, and 'off'
is equivalent to
false
. Thus, you can use the value of this property as a logical
value. The value is stored as an on/off logical value of type matlab.lang.OnOffSwitchState
.
'on'
— Value must be equal to or less than the upper limit.'off'
— Value must be less than the upper limit.
For example, if you want the numeric input to be between 0 and 1, excluding 0 and 1, do all of the following:
Set the
Limits
property value to[0 1]
.Set the
UpperLimitInclusive
property to'off'
.Set the
LowerLimitInclusive
property to'off'
.
Font and Color
FontName
— Font name
system supported font name
Font name, specified as a system supported font name. The default font depends on the specific operating system and locale.
If the specified font is not available, then MATLAB uses the best match among the fonts available on the system where the app is running.
Example: 'Arial'
FontSize
— Font size
positive number
Font size, specified as a positive number. The units of measurement are pixels. The default font size depends on the specific operating system and locale.
Example: 14
FontWeight
— Font weight
'normal'
(default) | 'bold'
Font weight, specified as one of these values:
'normal'
— Default weight as defined by the particular font'bold'
— Thicker character outlines than'normal'
Not all fonts have a bold font weight. For fonts that do not, specifying
'bold'
results in the normal font weight.
FontAngle
— Font angle
'normal'
(default) | 'italic'
Font angle, specified as 'normal'
or 'italic'
.
Not all fonts have an italic font angle. For fonts that do not, specifying
'italic'
results in the normal font angle.
FontColor
— Font color
[0 0 0]
(default) | RGB triplet | hexadecimal color code | 'r'
| 'g'
| 'b'
| ...
Font color, specified as an RGB triplet, a hexadecimal color code, or one of the options listed in the table.
RGB triplets and hexadecimal color codes are useful for specifying custom colors.
An RGB triplet is a three-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range
[0,1]
; for example,[0.4 0.6 0.7]
.A hexadecimal color code is a character vector or a string scalar that starts with a hash symbol (
#
) followed by three or six hexadecimal digits, which can range from0
toF
. The values are not case sensitive. Thus, the color codes"#FF8800"
,"#ff8800"
,"#F80"
, and"#f80"
are equivalent.
Alternatively, you can specify some common colors by name. This table lists the named color options, the equivalent RGB triplets, and hexadecimal color codes.
Color Name | Short Name | RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|---|---|
"red" | "r" | [1 0 0] | "#FF0000" | |
"green" | "g" | [0 1 0] | "#00FF00" | |
"blue" | "b" | [0 0 1] | "#0000FF" | |
"cyan"
| "c" | [0 1 1] | "#00FFFF" | |
"magenta" | "m" | [1 0 1] | "#FF00FF" | |
"yellow" | "y" | [1 1 0] | "#FFFF00" | |
"black" | "k" | [0 0 0] | "#000000" | |
"white" | "w" | [1 1 1] | "#FFFFFF" |
Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB uses in many types of plots.
RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|
[0 0.4470 0.7410] | "#0072BD" | |
[0.8500 0.3250 0.0980] | "#D95319" | |
[0.9290 0.6940 0.1250] | "#EDB120" | |
[0.4940 0.1840 0.5560] | "#7E2F8E" | |
[0.4660 0.6740 0.1880] | "#77AC30" | |
[0.3010 0.7450 0.9330] | "#4DBEEE" | |
[0.6350 0.0780 0.1840] | "#A2142F" |
BackgroundColor
— Background color
[1 1 1]
(default) | RGB triplet | hexadecimal color code | 'r'
| 'g'
| 'b'
| ...
Background color, specified as an RGB triplet, a hexadecimal color code, or one of the color options listed in the table.
RGB triplets and hexadecimal color codes are useful for specifying custom colors.
An RGB triplet is a three-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range
[0,1]
; for example,[0.4 0.6 0.7]
.A hexadecimal color code is a character vector or a string scalar that starts with a hash symbol (
#
) followed by three or six hexadecimal digits, which can range from0
toF
. The values are not case sensitive. Thus, the color codes"#FF8800"
,"#ff8800"
,"#F80"
, and"#f80"
are equivalent.
Alternatively, you can specify some common colors by name. This table lists the named color options, the equivalent RGB triplets, and hexadecimal color codes.
Color Name | Short Name | RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|---|---|
"red" | "r" | [1 0 0] | "#FF0000" | |
"green" | "g" | [0 1 0] | "#00FF00" | |
"blue" | "b" | [0 0 1] | "#0000FF" | |
"cyan"
| "c" | [0 1 1] | "#00FFFF" | |
"magenta" | "m" | [1 0 1] | "#FF00FF" | |
"yellow" | "y" | [1 1 0] | "#FFFF00" | |
"black" | "k" | [0 0 0] | "#000000" | |
"white" | "w" | [1 1 1] | "#FFFFFF" |
Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB uses in many types of plots.
RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|
[0 0.4470 0.7410] | "#0072BD" | |
[0.8500 0.3250 0.0980] | "#D95319" | |
[0.9290 0.6940 0.1250] | "#EDB120" | |
[0.4940 0.1840 0.5560] | "#7E2F8E" | |
[0.4660 0.6740 0.1880] | "#77AC30" | |
[0.3010 0.7450 0.9330] | "#4DBEEE" | |
[0.6350 0.0780 0.1840] | "#A2142F" |
Interactivity
Visible
— State of visibility
'on'
(default) | on/off logical value
State of visibility, specified as 'on'
or 'off'
,
or as numeric or logical 1
(true
) or
0
(false
). A value of 'on'
is equivalent to true
, and 'off'
is equivalent to
false
. Thus, you can use the value of this property as a logical
value. The value is stored as an on/off logical value of type matlab.lang.OnOffSwitchState
.
'on'
— Display the object.'off'
— Hide the object without deleting it. You still can access the properties of an invisible UI component.
To make your app start faster, set the Visible
property to
'off'
for all UI components that do not need to appear at
startup.
Editable
— Editability of spinner
'on'
(default) | on/off logical value
Editability of the spinner, specified as 'on'
or
'off'
, or as numeric or logical 1
(true
) or 0
(false
). A
value of 'on'
is equivalent to true
, and
'off'
is equivalent to false
. Thus, you can
use the value of this property as a logical value. The value is stored as an on/off
logical value of type matlab.lang.OnOffSwitchState
.
Use this property in combination with the Enable
property
value to determine if and how the component responds to app user input:
To make the spinner editable, the arrow buttons operational, and the associated callback triggerable, set both the
Enable
property and theEditable
property values to'on'
.To make the spinner uneditable, but the arrow buttons operational, set the
Editable
property to'off'
and theEnable
property to'on'
.To make the spinner uneditable and the arrow buttons nonoperational, set the
Editable
property to'off'
and theEnable
property to'off'
.
Enable
— Operational state of spinner
'on'
(default) | on/off logical value
Operational state of the spinner, specified as 'on'
or
'off'
, or as numeric or logical 1
(true
) or 0
(false
). A
value of 'on'
is equivalent to true
, and
'off'
is equivalent to false
. Thus, you can
use the value of this property as a logical value. The value is stored as an on/off
logical value of type matlab.lang.OnOffSwitchState
.
Use this property in combination with the Editable
property
value to determine if and how the component responds to app user input:
To make the spinner editable, the arrow buttons operational, and the associated callback triggerable, set both the
Enable
property and theEditable
property values to'on'
To make the spinner uneditable, but the arrow buttons operational, set the
Editable
property to'off'
and theEnable
property to'on'
.To make the spinner uneditable and the arrow buttons nonoperational, set the
Editable
property to'off'
and theEnable
property to'off'
.
Tooltip
— Tooltip
''
(default) | character vector | cell array of character vectors | string array | 1-D categorical array
Tooltip, specified as a character vector, cell array of character vectors, string array, or 1-D categorical array. Use this property to display a message when the user hovers the pointer over the component at run time. The tooltip displays even when the component is disabled. To display multiple lines of text, specify a cell array of character vectors or a string array. Each element in the array becomes a separate line of text. If you specify this property as a categorical array, MATLAB uses the values in the array, not the full set of categories.
ContextMenu
— Context menu
empty GraphicsPlaceholder
array (default) | ContextMenu
object
Context menu, specified as a ContextMenu
object created using the uicontextmenu
function. Use this property to display a context menu when
you right-click on a component.
Position
Position
— Location and size of spinner
[100 100 100 22]
(default) | [left bottom width height]
Location and size of spinner relative to the parent container,
specified as the vector [left bottom width height]
.
This table describes each element in the vector.
Element | Description |
---|---|
left | Distance from the inner left edge of the parent container to the outer left edge of the spinner |
bottom | Distance from the inner bottom edge of the parent container to the outer bottom edge of the spinner |
width | Distance between the right and left outer edges of the spinner |
height | Distance between the top and bottom outer edges of the spinner |
All measurements are in pixel units.
The Position
values are relative to the
drawable area of the parent container. The drawable area is the area
inside the borders of the container and does not include the area occupied by decorations such
as a menu bar or title.
Example: [100 100 100 22]
InnerPosition
— Inner location and size of spinner
[100 100 100 22]
(default) | [left bottom width height]
Inner location and size of the spinner, specified as [left bottom width
height]
. Position values are relative to the parent container. All
measurements are in pixel units. This property value is identical to the
Position
property.
OuterPosition
— Outer location and size of spinner
[100 100 100 22]]
(default) | [left bottom width height]
This property is read-only.
Outer location and size of spinner, returned as [left bottom width
height]
. Position values are relative to the parent container. All
measurements are in pixel units. This property value is identical to the
Position
property.
Layout
— Layout options
empty LayoutOptions
array (default) | GridLayoutOptions
object
Layout options, specified as a
GridLayoutOptions
object. This property specifies options for
components that are children of grid layout containers. If the component is not a
child of a grid layout container (for example, it is a child of a figure or panel),
then this property is empty and has no effect. However, if the component is a child of
a grid layout container, you can place the component in the desired row and column of
the grid by setting the Row
and Column
properties on the GridLayoutOptions
object.
For example, this code places a spinner in the third row and second column of its parent grid.
g = uigridlayout([4 3]); s = uispinner(g); s.Layout.Row = 3; s.Layout.Column = 2;
To make the spinner span multiple rows or columns, specify the
Row
or Column
property as a two-element
vector. For example, this spinner spans columns 2
through
3
:
s.Layout.Column = [2 3];
Callbacks
ValueChangedFcn
— Value changed callback
''
(default) | function handle | cell array | character vector
Value changed callback, specified as one of these values:
A function handle.
A cell array in which the first element is a function handle. Subsequent elements in the cell array are the arguments to pass to the callback function.
A character vector containing a valid MATLAB expression (not recommended). MATLAB evaluates this expression in the base workspace.
This callback executes when the user changes focus or presses the Enter key after changing the spinner value. It does not matter whether the user changes the spinner value by typing or by pressing the arrow keys. The callback does not execute if the spinner value changes programmatically.
This callback function can access specific information about the user’s interaction
with the spinner. MATLAB passes this information in a ValueChangedData
object as the second argument to your callback function.
In App Designer, the argument is called event
. You can query the
object properties using dot notation. For example,
event.PreviousValue
returns the previous value of the spinner.
The ValueChangedData
object is not available to
callback functions specified as character vectors.
The following table lists the properties of the ValueChangedData
object.
Property | Value |
---|---|
Value | Value of spinner after app user’s most recent interaction with it |
PreviousValue | Value of spinner before app user’s most recent interaction with it |
Source | Component that executes the callback |
EventName | 'ValueChanged' |
For more information about writing callbacks, see Callbacks in App Designer.
ValueChangingFcn
— Value changing callback
''
(default) | function handle | cell array | character vector
Value changing callback, specified as one of these values:
A function handle.
A cell array in which the first element is a function handle. Subsequent elements in the cell array are the arguments to pass to the callback function.
A character vector containing a valid MATLAB expression (not recommended). MATLAB evaluates this expression in the base workspace.
This callback function executes as the user clicks and holds the up or down arrow on
the spinner. It does not execute if the Value
property changes
programmatically.
This callback function can access specific information about the user’s interaction
with the spinner. MATLAB passes this information in a ValueChangingData
object as the second argument to your callback
function. In App Designer, the argument is called event
. You can
query the object properties using dot notation. For example,
event.Value
returns the current value of the spinner. The
ValueChangingData
object is not available to
callback functions specified as character vectors.
The following table lists the properties of the ValueChangingData
object.
Property | Value |
---|---|
Value | Current value of the spinner as the app user is interacting with it |
Source | Component that executes the callback |
EventName | 'ValueChanging' |
The Value
property of the Spinner
is not updated until the app user releases the arrow key.
Therefore, to get the values while the arrow key is being pressed, your code must get
the Value
property of the ValueChangingData
object.
Note
Avoid updating the Value
property of the
Spinner
object from within its own
ValueChangingFcn
callback, as this might result in unexpected
behavior. To update the spinner value in response to user input, use a
ValueChangedFcn
callback instead.
The callback executes as follows:
If the app user clicks a spinner up or down arrow, the callback executes once. For example, suppose that the spinner value is 2, and the
Step
value is 1. If the app user clicks the up arrow, the callback executes.If the app user presses and holds a spinner up or down arrow, the callback executes repeatedly. For example, if the app user clicks and holds the up arrow, the callback executes multiple times until the app user releases the up arrow.
For more information about writing callbacks, see Callbacks in App Designer.
CreateFcn
— Creation function
''
(default) | function handle | cell array | character vector
Object creation function, specified as one of these values:
Function handle.
Cell array in which the first element is a function handle. Subsequent elements in the cell array are the arguments to pass to the callback function.
Character vector containing a valid MATLAB expression (not recommended). MATLAB evaluates this expression in the base workspace.
For more information about specifying a callback as a function handle, cell array, or character vector, see Callbacks in App Designer.
This property specifies a callback function to execute when MATLAB creates the object. MATLAB initializes all property values before executing the CreateFcn
callback. If you do not specify the CreateFcn
property, then MATLAB executes a default creation function.
Setting the CreateFcn
property on an existing component has no effect.
If you specify this property as a function handle or cell array, you can access the object that is being created using the first argument of the callback function. Otherwise, use the gcbo
function to access the object.
DeleteFcn
— Deletion function
''
(default) | function handle | cell array | character vector
Object deletion function, specified as one of these values:
Function handle.
Cell array in which the first element is a function handle. Subsequent elements in the cell array are the arguments to pass to the callback function.
Character vector containing a valid MATLAB expression (not recommended). MATLAB evaluates this expression in the base workspace.
For more information about specifying a callback as a function handle, cell array, or character vector, see Callbacks in App Designer.
This property specifies a callback function to execute when MATLAB deletes the object. MATLAB executes the DeleteFcn
callback before destroying the
properties of the object. If you do not specify the DeleteFcn
property, then MATLAB executes a default deletion function.
If you specify this property as a function handle or cell array, you can access the
object that is being deleted using the first argument of the callback function.
Otherwise, use the gcbo
function to access the
object.
Callback Execution Control
Interruptible
— Callback interruption
'on'
(default) | on/off logical value
Callback interruption, specified as 'on'
or 'off'
, or as
numeric or logical 1
(true
) or
0
(false
). A value of 'on'
is equivalent to true
, and 'off'
is equivalent to
false
. Thus, you can use the value of this property as a logical
value. The value is stored as an on/off logical value of type matlab.lang.OnOffSwitchState
.
This property determines if a running callback can be interrupted. There are two callback states to consider:
The running callback is the currently executing callback.
The interrupting callback is a callback that tries to interrupt the running callback.
MATLAB determines callback interruption behavior whenever it executes a command that
processes the callback queue. These commands include drawnow
, figure
, uifigure
, getframe
, waitfor
, and pause
.
If the running callback does not contain one of these commands, then no interruption occurs. MATLAB first finishes executing the running callback, and later executes the interrupting callback.
If the running callback does contain one of these commands, then the
Interruptible
property of the object that owns the running
callback determines if the interruption occurs:
If the value of
Interruptible
is'off'
, then no interruption occurs. Instead, theBusyAction
property of the object that owns the interrupting callback determines if the interrupting callback is discarded or added to the callback queue.If the value of
Interruptible
is'on'
, then the interruption occurs. The next time MATLAB processes the callback queue, it stops the execution of the running callback and executes the interrupting callback. After the interrupting callback completes, MATLAB then resumes executing the running callback.
Note
Callback interruption and execution behave differently in these situations:
If the interrupting callback is a
DeleteFcn
,CloseRequestFcn
, orSizeChangedFcn
callback, then the interruption occurs regardless of theInterruptible
property value.If the running callback is currently executing the
waitfor
function, then the interruption occurs regardless of theInterruptible
property value.If the interrupting callback is owned by a
Timer
object, then the callback executes according to schedule regardless of theInterruptible
property value.
BusyAction
— Callback queuing
'queue'
(default) | 'cancel'
Callback queuing, specified as 'queue'
or 'cancel'
. The BusyAction
property determines how MATLAB handles the execution of interrupting callbacks. There are two callback states to consider:
The running callback is the currently executing callback.
The interrupting callback is a callback that tries to interrupt the running callback.
The BusyAction
property determines callback queuing behavior only
when both of these conditions are met:
Under these conditions, the BusyAction
property of the
object that owns the interrupting callback determines how MATLAB handles the interrupting callback. These are possible values of the
BusyAction
property:
'queue'
— Puts the interrupting callback in a queue to be processed after the running callback finishes execution.'cancel'
— Does not execute the interrupting callback.
BeingDeleted
— Deletion status
on/off logical value
This property is read-only.
Deletion status, returned as an on/off logical value of type matlab.lang.OnOffSwitchState
.
MATLAB sets the BeingDeleted
property to
'on'
when the DeleteFcn
callback begins
execution. The BeingDeleted
property remains set to
'on'
until the component object no longer exists.
Check the value of the BeingDeleted
property to verify that the object is not about to be deleted before querying or modifying it.
Parent/Child
Parent
— Parent container
Figure
object (default) | Panel
object | Tab
object | ButtonGroup
object | GridLayout
object
Parent container, specified as a Figure
object
created using the uifigure
function, or one of its child
containers: Tab
, Panel
, ButtonGroup
, or GridLayout
. If no container is specified, MATLAB calls the uifigure
function to create a new Figure
object that serves as the parent container.
HandleVisibility
— Visibility of object handle
'on'
(default) | 'callback'
| 'off'
Visibility of the object handle, specified as 'on'
, 'callback'
,
or 'off'
.
This property controls the visibility of the object in its parent's
list of children. When an object is not visible in its parent's list
of children, it is not returned by functions that obtain objects by
searching the object hierarchy or querying properties. These functions
include get
, findobj
, clf
,
and close
. Objects are valid
even if they are not visible. If you can access an object, you can
set and get its properties, and pass it to any function that operates
on objects.
HandleVisibility Value | Description |
---|---|
'on' | The object is always visible. |
'callback' | The object is visible from within callbacks or functions invoked by callbacks, but not from within functions invoked from the command line. This option blocks access to the object at the command-line, but allows callback functions to access it. |
'off' | The object is invisible at all times. This option is useful
for preventing unintended changes to the UI by another function. Set
the HandleVisibility to 'off' to
temporarily hide the object during the execution of that function.
|
Identifiers
Type
— Type of graphics object
'uispinner'
This property is read-only.
Type of graphics object, returned as 'uispinner'
.
Tag
— Object identifier
''
(default) | character vector | string scalar
Object identifier, specified as a character vector or string scalar. You can specify a unique Tag
value to serve as an identifier for an object. When you need access to the object elsewhere in your code, you can use the findobj
function to search for the object based on the Tag
value.
UserData
— User data
[]
(default) | array
User data, specified as any MATLAB array. For example, you can specify a scalar, vector, matrix, cell array, character array, table, or structure. Use this property to store arbitrary data on an object.
If you are working in App Designer, create public or private properties in the app to share data instead of using the UserData
property. For more information, see Share Data Within App Designer Apps.
Object Functions
focus | Focus UI component |
Examples
Set and Access Spinner Property Values
Create a spinner that limits the values the app user can enter to between 0 and 100, inclusive.
Create a spinner.
fig = uifigure; spn = uispinner(fig);
Determine the limits. The returned values indicate that the lower and upper limits are unlimited.
limits = spn.Limits
limits = -Inf Inf
Set the limits to 0 and 100.
spn.Limits = [0 100];
Create Spinner and Specify Limit Inclusiveness
Create a spinner that allows the app user to enter a value greater than -5 and less than or equal to 10.
fig = uifigure; spn = uispinner(fig,'Limits', [-5 10],... 'LowerLimitInclusive','off',... 'UpperLimitInclusive','on',... 'Value', 5);
Run the code. If you enter a value in the spinner that is outside the limits, MATLAB automatically displays a message indicating the problem. MATLAB then restores the value to the previous valid value.
Create Spinner That Displays Values Using Exactly Two Decimals
Create a spinner that allows the app user to enter any value, but always displays the value using exactly two decimals. Be aware that MATLAB stores the exact value that the app user enters.
fig = uifigure; spn = uispinner(fig,'ValueDisplayFormat', '%.2f');
Run the code, and then enter 5.555 in the spinner. Click outside the spinner. The spinner displays 5.55.
MATLAB stores the original value, 5.555.
Click in the spinner, it displays the value originally typed.
Code Response to Changed Spinner Value
Create a spinner and a slider. When an app user changes the spinner value, the slider updates to match that value.
Save the following code to spinnerValue.m
on your MATLAB path. This code creates a figure window containing a slider and a spinner.
When an app user changes the spinner value, the ValueChangedFcn
updates the spinner to reflect the slider value.
function spinnervalue fig = uifigure('Position',[100 100 370 280]); sld = uislider(fig,... 'Position',[90 220 120 3]); spn = uispinner(fig,... 'Position',[100 140 100 22],... 'Limits',sld.Limits,... 'ValueChangedFcn',@(spn,event) updateSlider(spn,sld)); end % Create ValueChangedFcn callback function updateSlider(spn,sld) sld.Value = spn.Value; end
Run spinnerValue
.
Click and hold the up arrow in the spinner until the value reaches 24, and then release. The slider thumb moves to indicate the spinner value.
Code Response to Calculate Changed Spinner Value
Code the ValueChangedFcn
callback to determine
if the value is rising or falling compared to the previous spinner value. Set lamp color
to green when the value is increasing and to red when the value is decreasing
Save the following code to upOrDown.m
on your MATLAB path.
function upOrDown fig = uifigure(... 'Position',[100 100 190 170]); lmp = uilamp(fig,... 'Position',[90 50 20 20],... 'Color','green'); spn = uispinner(fig,... 'Position',[50 100 100 22],... 'ValueChangedFcn',@(spn,event) spinnerValueChanged(event,lmp)); end % Create ValueChangedFcn that uses event data function spinnerValueChanged(event,lmp) newValue = event.Value; previousValue = event.PreviousValue; difference = newValue-previousValue; if difference > 0 lmp.Color = 'green'; else lmp.Color = 'red'; end end
Run upOrDown
.
Each time you change the spinner value, the ValueChangedFcn
determines whether the value is increasing or decreasing and sets the lamp color
accordingly.
Version History
Introduced in R2016a
MATLAB 명령
다음 MATLAB 명령에 해당하는 링크를 클릭했습니다.
명령을 실행하려면 MATLAB 명령 창에 입력하십시오. 웹 브라우저는 MATLAB 명령을 지원하지 않습니다.
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