Tab
Tab UI container
Description
A tab UI container groups UI components with a tabbed label inside a tab group.
Use the Tab
object to modify the appearance and behavior of a tab after you
create it.
Creation
Create a tab in an app using the uitab
function.
Properties
Title and Color
Title
— Title
character vector | string scalar | categorical array
Title, specified as a character vector, string scalar, or categorical array. If you specify this property as a categorical array, MATLAB® displays only the first element in the array.
MATLAB does not interpret a vertical slash ('|'
) character as
a line break, it displays as a vertical slash in the title.
If you want to specify a Unicode® character, pass the Unicode decimal
code to the char
function.
For example, ['Multiples of ' char(960)]
displays
as Multiples of
π.
ForegroundColor
— Title color
[0 0 0]
(default) | RGB triplet | hexadecimal color code | 'r'
| 'g'
| 'b'
| ...
Title 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" |
BackgroundColor
— Background color
[0.94 0.94 0.94]
(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
Tooltip
— Tooltip
''
(default) | character vector | string scalar | cell array of character vectors | string array | 1-D categorical array
Tooltip, specified as a character vector, string scalar, 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. 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 tab
[left bottom width height]
This property is read-only.
Location and size of the tab, returned as a four-element vector
of the form [left bottom width height]
. This table
describes each element in the vector.
Element | Description |
---|---|
left | Distance from the inner left edge of the tab group to the inner left edge of the tab |
bottom | Distance from the inner bottom edge of the tab group to the inner bottom edge of the tab |
width | Distance between the right and left inner edges of the tab |
height | Distance between the top and bottom inner edges of the tab |
All measurements are in units specified by the Units
property.
Note
These are some important points to consider when using the Position
property:
Position
values are affected by the length of the tab title and theTabLocation
property of the parentTabGroup
object.Position
values are relative to the drawable area of the parentTabGroup
, which is the area inside its borders.If the tab is in a grid layout manager, the value of the
Position
property is not immediately updated. To use thePosition
value to resize the tab children relative to the tab size, use aSizeChangedFcn
callback.
InnerPosition
— Location and size of tab
[left bottom width height]
This property is read-only.
Location and size of the tab, returned as a four-element vector of the form
[left bottom width height]
. All measurements are in units
specified by the Units
property.
This property value is identical to the Position
and
OuterPosition
property values.
OuterPosition
— Location and size of tab
[left bottom width height]
This property is read-only.
Location and size of the tab, returned as a four-element vector of the form
[left bottom width height]
. All measurements are in units
specified by the Units
property.
This property value is identical to the Position
and
InnerPosition
property values.
Units
— Units of measurement
'pixels'
| 'normalized'
| 'inches'
| 'centimeters'
| 'points'
| 'characters'
Units of measurement, specified as one of the values in this table.
Units Value | Description |
---|---|
'pixels' (default in uifigure -based apps) | Distances in pixels are independent of your system resolution on Windows® and Macintosh systems:
On Linux® systems, the size of a pixel is determined by your system resolution. |
'normalized' (default in figure -based apps) | These units are normalized with respect to the parent container. The lower-left corner of the container maps to |
'inches' | Inches. |
'centimeters' | Centimeters. |
'points' | Points. One point equals 1/72nd of an inch. |
'characters' | These units are based on the default uicontrol font of the graphics root object:
To access the default uicontrol font, use |
The recommended value is 'pixels'
, because most MATLAB app building functionality measures distances in pixels. You can create an
object that rescales based on the size of the parent container by parenting the object
to a grid layout manager created using the uigridlayout
function. For more information, see Lay Out Apps Programmatically.
Callbacks
SizeChangedFcn
— Size change callback
''
(default) | function handle | cell array | character vector
Size change 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.
Define this callback to customize the app layout when the size of this container changes (e.g., when the user resizes the window).
Note
In uifigure
-based apps, the
SizeChangedFcn
callback will not execute unless the
AutoResizeChildren
property of this container is set to
'off'
. In App Designer, you can make the
SizeChangedFcn
executable by clearing the
AutoResizeChildren check box in the UI Figure
Properties panel.
The SizeChangedFcn
callback executes when the parent tab
group container:
Becomes visible for the first time.
Is visible while its size changes.
Becomes visible for the first time after its size changes. This situation occurs when the size changes while the container is invisible, and then it becomes visible later.
Other important points to consider when defining a
SizeChangedFcn
callback:
Consider delaying the display of this container until after all the variables that the
SizeChangedFcn
uses are defined. This practice can prevent theSizeChangedFcn
callback from returning an error. To achieve this delay, you delay the display of the parent tab group container, by setting itsVisible
property to'off'
. Then, set theVisible
property to'on'
after you define the variables that yourSizeChangedFcn
callback uses.If your app contains nested containers, they resize from the inside out.
To access the container that is resizing from within the
SizeChangedFcn
, refer to the source object (the first input argument in the callback).
In uifigure
-based apps, alternate ways to specify resize
behavior are to create a GridLayout
object or use the auto-reflow
options in App Designer. These options can be easier to use than
SizeChangedFcn
callbacks. However, there are some advantages
that SizeChangedFcn
callbacks have over these options. For example:
Resizing a component up to a minimum or maximum size that you define.
Implementing non-linear resize behaviors.
ButtonDownFcn
— Button-press callback function
''
(default) | function handle | cell array | character vector
Button-press callback function, 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.
For more information about specifying a callback property value as a function handle, cell array, or character vector, see Specify a Callback Function.
The ButtonDownFcn
callback is a function that executes when the user
clicks a mouse button within the container.
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 object
TabGroup
object
Parent object, specified as a TabGroup
object.
The TabGroup
must be the child of a Figure
created using the uifigure
function.
Children
— Children of tab
empty GraphicsPlaceholder
array (default) | 1-D array of component objects
Children of tab, returned as an empty GraphicsPlaceholder
or a
1-D array of app component objects.
You cannot add or remove children using the Children
property
of the tab. Use this property to view the list of children or to reorder the children.
The order of the children in this array reflects the order of the tabs displayed on
the screen.
To add a child to this list, set the Parent
property of the
child component to be the Tab
object.
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
'uitab'
This property is read-only.
Type of graphics object, returned as 'uitab'
.
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.
uifigure
-Based Apps Only
AutoResizeChildren
— Automatically resize children
'on'
(default) | on/off logical value
Note
This property is valid only for tabs in App Designer and in apps created using
the uifigure
function.
Automatically resize children, 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'
— Child components automatically resize when the container resizes.'off'
— Child components do not resize.
The AutoResizeChildren
property affects direct
children of the container, not children inside nested containers.
To customize the resize behavior, set the AutoResizeChildren
property to 'off'
and create a SizeChangedFcn
callback for the container. For more information, see Manage App Resize Behavior Programmatically.
To disable resizing of an app, set the Resize
property of the figure to
'off'
.
Scrollable
— Ability to scroll
'off'
(default) | on/off logical value
Note
This property is valid only for tabs in App Designer and in apps created using
the uifigure
function.
Ability to scroll, specified as 'off'
or
'on'
, 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
.
Setting this property to 'on'
enables scrolling within the
container. However, there are additional requirements:
The child components in the container must occupy a larger area than the container can display at one time.
Components that do not fit in the container must be above or to the right of the container. You cannot scroll to components that are below or to the left of the container.
If the container contains a grid layout manager, the
Scrollable
property of the container has no effect. To enable scrolling, instead set theScrollable
property of theGridLayout
object to'on'
.
Certain types of charts and axes do not support scrollable containers. However, you can place the chart or axes in a nonscrollable panel, and then place the panel in the scrollable container. For more information, see Display Graphics in App Designer.
Object Functions
scroll | Scroll to location within component |
isInScrollView | Determine if component is visible in scrollable container |
Examples
Set and Access Tab Property Values
Create a tab group with two tabs in a UI figure, and customize the appearance of the tabs by specifying property values.
fig = uifigure; tg = uitabgroup(fig); t1 = uitab(tg,"Title","Data","BackgroundColor",[0 0.4470 0.7410]); t2 = uitab(tg,"Title","Plots","BackgroundColor",[0 0.4470 0.7410]);
Query the text color of the Data tab title.
c = t1.ForegroundColor
c = 1×3
0 0 0
Update the text color to match the tab background color.
t1.ForegroundColor = t1.BackgroundColor;
Create Scrollable Tab
The Scrollable
property enables scrolling within
a tab that has components outside its borders. Scrolling is only possible when the parent
tab group is in a figure created with the uifigure
function. App Designer uses this type of figure for creating
apps.
Create a tab group containing one tab. Add six UI components to the tab, with the first three lying outside the upper border of the tab.
fig = uifigure; tg = uitabgroup(fig,'Position',[20 20 196 145]); t = uitab(tg,'Title','Member Information'); ef1 = uieditfield(t,'text','Position',[11 165 140 22],'Value','First Name'); ef2 = uieditfield(t,'text','Position',[11 140 140 22],'Value','Last Name'); ef3 = uieditfield(t,'text','Position',[11 115 140 22],'Value','Address'); dd = uidropdown(t,'Position',[11 90 140 22],'Items',{'Male','Female'}); cb = uicheckbox(t,'Position',[11 65 140 22],'Text','Member'); b = uibutton(t,'Position',[11 40 140 22],'Text','Send');
Enable scrolling by setting the Scrollable
property of the tab
to 'on'
. By default, the scroll box displays at the top.
t.Scrollable = 'on';
Program Response to Switching Tabs
In a new script, create a tab group with two tabs in a UI figure. Specify the
SelectionChangedFcn
property as a handle to a function named
displaySelection
. This function executes when a user switches
between tabs in the tab group.
At the bottom of the script, define the displaySelection
function to accept the two input arguments that MATLAB passes to callback functions:
src
— The component that executed the callbackevent
— Information about the user interaction that triggered the callback
In the callback function, write code to display the title of the visible tab in the Command Window.
fig = uifigure; tg = uitabgroup(fig,"SelectionChangedFcn",@displaySelection); t1 = uitab(tg,"Title","Data"); t2 = uitab(tg,"Title","Plots"); function displaySelection(src,event) t = event.NewValue; title = t.Title; disp("Viewing the " + title + " tab") end
Run the script and toggle between tabs to display the tab titles.
For more information, see Create Callbacks for Apps Created Programmatically.
Version History
Introduced in R2014bR2022b: Position
, InnerPosition
, and OuterPosition
properties return the position relative to the tab group
area that excludes borders and titles in uifigure
-based apps
For apps created in App Designer and using the uifigure
function,
when you query the InnerPosition
property of a tab group, the property
returns a different value than in the previous release. In addition, if the
TabLocation
is 'left'
or
'bottom'
, when you query the Position
,
InnerPosition
, and OuterPosition
properties of a tab
in the tab group, the properties might return different values than in the previous
release.
This table describes the differences in the property values between R2022b and previous releases.
Property | Starting in R2022b | R2022a and Earlier | ||
---|---|---|---|---|
Description | Image | Description | Image | |
InnerPosition of a tab group | A four-element vector of the form [left bottom width height]
that represents the size and location of the tab group relative to the drawable area
of its parent, excluding borders and titles of the tabs it
contains | Tab group | A four-element vector of the form [left bottom width height]
that represents the size and location of the tab group relative to the drawable area
of its parent, including borders and titles of the tabs it
contains | Tab group |
Position , InnerPosition , and
OuterPosition of a tab | A four-element vector of the form [left bottom width height]
that represents the size and location of the tab relative to the tab group drawable
area, where the tab group drawable area excludes
borders and titles | Tab | A four-element vector of the form [left bottom width height]
that represents the size and location of the tab relative to the tab group drawable
area, where the tab group drawable area includes
borders and titles | Tab |
If you notice changes in your app layout, consider updating your code in this way:
Tab group
InnerPosition
— Replace references to the tab groupInnerPosition
property with the tab groupPosition
property to use the size and location of the tab group including the borders and tab titles.Tab
Position
,InnerPosition
, andOuterPosition
— Replace references to the first two elements of the position vector to instead use the space taken up on the left or bottom by the tab titles. For example, if your app contains a tab group with aTabLocation
value of'left'
and you reference thePosition
property of a tab in that tab group, replace that reference with the horizontal distance between the tab group border and the tab drawable area.
R2020a: UIContextMenu
property is not recommended
Starting in R2020a, using the UIContextMenu
property to assign a
context menu to a graphics object or UI component is not recommended. Use the
ContextMenu
property instead. The property values are the
same.
There are no plans to remove support for the UIContextMenu
property
at this time. However, the UIContextMenu
property no longer appears in
the list returned by calling the get
function on a graphics object or UI
component.
R2018b: TooltipString
property is not recommended
Starting in R2018b, using the TooltipString
property to specify a
tooltip for a UI component is not recommended. Use the Tooltip
property
instead. The property values are the same.
There are no plans to remove support for the TooltipString
property
at this time. However, the TooltipString
property no longer appears in
the list returned by calling the get
function on a UI component.
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