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Manage App Component Position and Sizing with Grid Layout

This app shows how to use a grid layout manager to control the alignment and resizing of app components when the app is resized. Grid layout managers allow you to easily manage the layout of app components without having to set the pixel positions of each component. Additionally, a grid layout provides more flexibility in resize behavior. For more information about using a grid layout manager, see Use Grid Layout Managers in App Designer.

Component Behavior in Grid Layout

In this app, the UI components on the left panel control parameters of a pulse. To provide a consistent experience no matter what size the app window is, the controls are laid out using a grid layout manager. The grid layout manages the alignment of the controls when the app is resized. The right panel contains axes for data visualization so that when a user changes the parameters of the pulse, the plot updates accordingly. To see how the components in a grid layout react to resizing, reduce the width of the app window. The components in the grid layout maintain a consistent size as the app window shrinks.

Create App with Grid Layout

Add and configure a grid layout manager in Design View, and then add UI components to the configured layout:

  1. Create a new 2-panel app with auto-reflow from the App Designer Start Page.

  2. Add a grid layout to the left panel. App Designer applies the grid layout to the entire app window or the container you place it in (in this case, the left panel).

  3. Adjust the numbers of rows and columns in the grid. Right-click the grid layout and select Configure Grid Layout from the context menu. You can add and remove rows and columns in the Resize Configuration menu by selecting a row or column. For this example, arrange the grid layout to have seven rows and four columns.

  4. Set the ColumnWidth and RowHeight properties in the Resize Configuration menu. For this example, set ColumnWidth for the columns that contain the knobs to "1x" so that the columns adjust to fill the space as the app is resized. This weighted width ensures that the knobs are the same width and share space in the grid equally. Set the RowHeight property of the rows that contain edit fields to "fit" so that the rows automatically adjust to fit.

  5. Specify additional properties of the grid layout in the Component Browser. Change the spacing between columns and rows by editing the ColumnSpacing and RowSpacing values, and adjust the spacing around the outer perimeter of the grid with the Padding property. For more information about these properties, see GridLayout Properties.

  6. Add the UI components to the grid by dragging them from the Component Library to the corresponding location in the grid layout.

After you lay out the app using the grid layout, program the app to respond to user input in Code View. For more information about callbacks and how to update the plot based on user input, see Callbacks in App Designer. Launch the example in App Designer to run the app and see how the grid layout adjusts the position and sizing of components as the app window resizes.

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