uifigure

Create figure for designing apps

Syntax

fig = uifigure

fig = uifigure(Name=Value)

Description

fig = uifigure creates a figure for building a user interface and returns the Figure object. This is the type of figure that App Designer uses.

fig = uifigure(Name=Value) specifies figure properties using one or more name-value arguments.

Examples

Create UI Figure

Create a blank figure for app building.

fig = uifigure;

Set and Access Figure Properties

Create a UI figure with a specific title and icon.

fig = uifigure("Name","Plotted Results", ...
    "Icon","peppers.png");

Query the figure background color.

c = fig.Color

c = 1×3

    0.9608    0.9608    0.9608

Change Figure Size

Create a default UI figure.

fig = uifigure;

Get the location, width, and height of the figure.

fig.Position

ans =

   681   559   560   420

This means that the figure window is positioned 681 pixels to the right and 559 pixels above the bottom left corner of the primary display, and is 560 pixels wide and 420 pixels tall.

Halve the figure width and height by adjusting the third and fourth elements of the position vector.

fig.Position(3:4) = [280 210];

Create Modal UI Figure

Create two UI figure windows. Block interactions in Figure 1 by specifying "modal" as the WindowStyle property value for Figure 2. You cannot interact with Figure 1 until Figure 2 is closed.

fig1 = uifigure(Name="Figure 1");
fig1.Position = [500 500 370 270];

fig2 = uifigure(Name="Figure 2");
fig2.Position = [540 450 370 270];
fig2.WindowStyle = "modal";

Code CloseRequestFcn to Confirm Closing UI Figure

Code the CloseRequestFcn callback to open a modal confirmation dialog box when the user tries to close the window.

Copy and paste this code into the MATLAB^® Editor, and then run closeFig.

function closeFig
fig = uifigure(Position=[100 100 425 275]);
fig.CloseRequestFcn = @(src,event)my_closereq(src);

    function my_closereq(fig)
        selection = uiconfirm(fig,"Close the figure window?",...
            "Confirmation");
        
        switch selection
            case 'OK'
                delete(fig)
            case 'Cancel'
                return
        end
    end

end

Click the figure close button. The confirmation dialog box opens.

Change Mouse Pointer Symbol

Change the displayed mouse pointer symbol when you hover over a push button.

This program file, called setMousePointer.m, shows you how to:

• Create a UI figure which executes custom code when the mouse is moved over a button. To do this, use the @ operator to assign the mouseMoved function handle to the WindowButtonMotionFcn property of the figure.

• Create a push button and specify its coordinates and label.

• Create a callback function called mouseMoved with the custom code you want to execute when the mouse moves over the button. In the function, query the CurrentPoint property to determine the mouse pointer coordinates. Set the Pointer property to "hand" if the pointer coordinates are within the push button coordinates.

Run setMousePointer. Then move the mouse over the push button to see the mouse pointer symbol change from an arrow to a hand.

function setMousePointer
fig = uifigure(Position=[500 500 375 275]);
fig.WindowButtonMotionFcn = @mouseMoved;

btn = uibutton(fig);
btnX = 50;
btnY = 50;
btnWidth = 100;
btnHeight = 22;
btn.Position = [btnX btnY btnWidth btnHeight];
btn.Text = "Submit Changes";

    function mouseMoved(src,event)
        mousePos = fig.CurrentPoint;
        if (mousePos(1) >= btnX) && (mousePos(1) <= btnX + btnWidth) ...
                && (mousePos(2) >= btnY) && (mousePos(2) <= btnY + btnHeight)
              fig.Pointer = "hand";
        else
              fig.Pointer = "arrow";
        end
    end
end

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Example: uifigure(Name="My App") specifies My App as the title of the UI figure.

Note

The properties listed here are a subset of the available properties. For the full list, see Figure.

WindowStyle — Window style

'normal' (default) | 'modal' | 'alwaysontop'

Window style, specified as one of these values:

• 'normal' — The figure appears in a standalone window, independent of other MATLAB windows.

• 'docked' — The figure is docked into the desktop.

• 'normal' — The figure window is independent of other windows, and the other windows are accessible while the figure is displaying.

• 'modal' — The figure appears on top of all existing figure windows that have a normal window style, making them inaccessible as long as the top figure exists and remains modal.

  When multiple modal windows exist, the most recently created window keeps focus and stays on top of all other windows until it becomes invisible, or is returned to a normal window style, or is deleted. At that time, focus reverts to the window that last had focus.

• 'alwaysontop' — The figure appears on top of all other windows, including modal figure windows and windows from applications other than MATLAB. The other windows are still accessible.

Note

These are some important characteristics of the WindowStyle property and some recommended best practices:

• When you create UI windows, specify the WindowStyle property. If you also want to set the Resize or Position properties of the figure, then set the WindowStyle property first.

• You can change the WindowStyle property of a figure at any time, including when the figure is visible and contains children. However on some systems, setting this property might cause the figure to flash or disappear and reappear, depending on the system's implementation of normal and modal windows. For best visual results, set the WindowStyle property at creation time or when the figure is invisible.

UI Figure Modal Window Style Behavior

When WindowStyle is set to 'modal', the UI figure window blocks keyboard and mouse interactions in a UI figure window that was created before it and has its Visible property set to 'on'. For instance, in this example Figure 3 is modal with respect to Figure 2 and Figure 2 is modal with respect to Figure 1.

fig1 = uifigure('Name','Figure 1');
fig1.WindowStyle = 'modal';

fig2 = uifigure('Name','Figure 2');
fig2.WindowStyle = 'modal';

fig3 = uifigure('Name','Figure 3');
fig3.WindowStyle = 'modal';

The modality hierarchy is not preserved if there is a combination of modal and normal figures in the hierarchy of figures.

Unlike modal figures created with the figure function, modal figures created with the uifigure function do not block access to figures created with the figure function or the MATLAB desktop. Interactions with application windows other than MATLAB are also not blocked.

Pressing Ctrl+C when a modal figure has focus causes that figure to revert to a 'normal' WindowStyle property setting. This allows the user to type at the command line.

UI figures with the WindowStyle property set to 'modal' and the Visible property set to 'off' do not behave modally until MATLAB makes them visible. Therefore, you can hide a modal window for later reuse, instead of destroying it.

Modal figures do not display menu children, built-in menus, or toolbars. But, it is not an error to create menus in a modal figure or to change the WindowStyle property setting to 'modal' on a figure with menu children. The Menu objects exist and the figure retains them. If you reset the UI figure WindowStyle property to 'normal', the menus display.

Name — Name

'' (default) | character vector | string scalar

Name of the figure, specified as a character vector or a string scalar.

Example: uifigure('Name','Results') sets the name of the figure to 'Results'.

In App Designer, the default value of the Name property is 'MATLAB App'.

Position — Location and size of figure, excluding borders, figure tools, and title bar

[left bottom width height]

Location and size of the figure, excluding borders, figure tools, and title bar, specified 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 left edge of the primary display to the inner left edge of the window. This value can be negative on systems that have more than one monitor. If the figure is docked, then this value is relative to its container.
bottom	Distance from the bottom edge of the primary display to the inner bottom edge of the window. This value can be negative on systems that have more than one monitor. If the figure is docked, then this value is relative to its container.
width	Distance between the right and left inner edges of the window.
height	Distance between the top and bottom inner edges of the window.

All measurements are in units specified by the Units property.

To position the full window, including the borders, figure tools, and title bar, use the OuterPosition property.

Note

The Windows^® operating system enforces a minimum window width and a maximum window size. If you specify a figure size outside of those limits, the displayed figure conforms to the limits instead of the size you specified.

Position — Location and size of UI figure, excluding borders and title bar

[left bottom width height]

Location and size of the UI figure, excluding borders and title bar, specified 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 left edge of the primary display to the inner left edge of the UI figure window. This value can be negative on systems that have more than one monitor.
bottom	Distance from the bottom edge of the primary display to the inner bottom edge of the UI figure window. This value can be negative on systems that have more than one monitor.
width	Distance between the right and left inner edges of the UI figure.
height	Distance between the top and bottom inner edges of the UI figure.

Limitations

• Currently, you cannot pass a Figure object created with the uifigure function to the print function. If you attempt to do so, MATLAB throws an error. For more information, see Display Graphics in App Designer.

Tips

• Use the graphics root object to set default values on the root level for other types of objects. For example, set the default colormap for all future figures to the summer colormap.

  set(groot,"DefaultFigureColormap",summer)

  To restore a property to its original MATLAB default, use the 'remove' keyword.

  set(groot,"DefaultFigureColormap","remove")

  For more information on setting default values, see Default Property Values.

• To bring a figure window to the front, use the focus function.

Version History

Introduced in R2016a

R2021a: Create UI figures that remain in the foreground

To keep a specific UI figure window in front of other windows, set the WindowStyle property to "alwaysontop". Unlike modal figures, UI figure windows with this property setting do not restrict keyboard and mouse interactions.

R2020b: Create modal UI figures

To restrict keyboard and mouse interactions to a specific UI figure window, set the WindowStyle property to "modal".

R2020b: Specify custom icons

To add a custom icon to a UI figure window, set the Icon property to an image file or an m-by-n-by-3 truecolor array.