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If we consider the File Browser example within the context of a Levure Helper then distributing the control becomes much simpler.
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Six of the scripts serve as behaviors while the other script is used as a frontscript. For example, the DataView helper folder contains seven script files and a stack with a sample DataView control.
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#Livecode indy latest version how to
The folder contains a configuration file ( helper.yml) that tells Levure how to use the files within the folder. A Helper in the Levure Framework is a means of adding complex functionality to a Levure application by simply dropping a folder into the Levure application project folder. This modular approach to building on top of DataViews is greatly simplified because the DataView is packaged up as a Levure Helper. For many use cases the ability to specify an icon, label, and colors, along with the necessary event messages to respond to user actions, would be adequate for a developer to add a tree UI to his or her application. The developer using the control might only need to specify some colors to use for folder and file icons and assign the dvRootFolder property in order to have a working file browser in their application.Ī similar control could be made for a generic tree browser. For example, a File Browser control could be distributed which contained the necessary behavior and row templates for browsing the file system. These specialized controls can focus on providing a very specific feature to an application. But it is possible to distribute very specialized controls that are built on top of a DataView. While these behaviors that add a dvData, dvCursor, or dvTree property are helpful, they still don’t provide templates that dictate what each row will look like. The File Browser and Stack Browser examples are built on top of it. There is also the DataView Tree behavior that adds a dvTree property for displaying tree structures in a DataView. A developer can assign the result of a call to revQueryDatabase to the property and the DataView will automatically scroll through the results. The DataView Database Cursor behavior, a separate download, adds a dvCursor property. The DataView comes with one behavior that allows a developer to assign a numerically indexed array to the dvData property of a DataView ( array_controller_behavior.livecodescript). These behaviors control the flow of data from a data source to the DataView behavior. In the demo application the ability to assign a database cursor or an array to the DataViews is provided by behaviors that inherit the base DataView behavior and are assigned to the DataView group control.
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Arrays built from functions, folder listings, and open stacks.In addition to the customized UI that each example uses, a couple of different data sources are used: List movies found in a SQLite database.List FontAwesome fonts along with icons taken from a SQLite database.Create a file browser from a folder of your choosing.As of this writing there are five examples: It serves as the foundation for any number of customized controls. For example, the DataView Demo application provides a a few examples of data being displayed with a DataView. Rather than being a control that is really easy to use but is very limited, the DataView is a control that can be customized for a variety of different needs. The developer must define the row template(s) to use and provide data for a specific row when the DataView asks for it. It has no default UI for rows and it doesn’t favor one data source over another. The custom group is placed on a card wherever a DataView will be used. Out of the box a DataView doesn’t do much without some configuration. The DataView is a custom control made up of a group, some child controls of that group, and various behaviors scripts. The DataView then displays those rows using templates (groups on a card) specified by a developer. A developer feeds a DataView rows of data from a variety of data sources.
#Livecode indy latest version code
Recently I announced that the source code for the DataView control was now available for LiveCode developers.