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jvx:reference [2020/06/10 12:49] cduncan [The Basics] |
jvx:reference [2020/06/10 12:53] cduncan [Bolting on functionality] |
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| As one can see, access to all objects which comprise GUI possible at all times. We, of course, have the UI component, we can access the implementation component, and we can access the extension/technology component. Theoretically, we could also swap them at runtime, but in [[https://sourceforge.net/projects/jvx/|JVx]], this is limited to the construction of the object to greatly reduce the error potential and complexity of the framework code. | As one can see, access to all objects which comprise GUI possible at all times. We, of course, have the UI component, we can access the implementation component, and we can access the extension/technology component. Theoretically, we could also swap them at runtime, but in [[https://sourceforge.net/projects/jvx/|JVx]], this is limited to the construction of the object to greatly reduce the error potential and complexity of the framework code. | ||
| - | ===== Creating custom components ===== | + | ===== Creating Custom Components ===== |
| - | We will use an example from the [[#part_about_creating_custom_components|part about creating custom components]] which we will come to later. The ''%%BeepComponent%%'' is a simple ''%%UIComponent%%'' extension which contains a label and two buttons inside itself. | + | We will use an example from the [[#part_about_creating_custom_components|part about creating custom components]], which we will come to later. The ''%%BeepComponent%%'' is a simple ''%%UIComponent%%'' extension which contains a label and two buttons inside itself. |
| <code java> | <code java> | ||
| Line 234: | Line 234: | ||
| } | } | ||
| </code> | </code> | ||
| - | We are setting a new UIResource (an ''%%UIPanel%%'') in the constructor (at line #5) which is to be used by the ''%%UIComponent%%''. In this case it is not an Implementation, but another UI component, but that doesn’t matter because the UIResource only must implement the expected interface. At line #15 we start using that custom UIResource. | + | We are setting a new UI resource (a ''%%UIPanel%%'') in the constructor (at line #5) that is to be used by the ''%%UI component%%''. In this case, it is not an implementation, but another UI component. However, that doesn’t matter because the UI resource only must implement the expected interface. At line #15 we start using that custom UI resource. |
| - | Because UIComponent is an abstract component designed for exactly this usage, the example might not be the most exciting one, but it clearly illustrates the mechanic. | + | Because UI component is an abstract component designed for exactly this usage, the example might not be the most exciting one, but it clearly illustrates the mechanic. |
| - | ===== Bolting on functionality ===== | + | ===== Bolting on Functionality ===== |
| - | Also from from the [[#part_about_creating_custom_components|part about creating custom components]] we can reuse the ''%%PostfixedLabel%%'' as example: | + | Also, from the [[#part_about_creating_custom_components|part about creating custom components]], we can reuse the ''%%PostfixedLabel%%'' as example: |
| <code java> | <code java> | ||
| Line 251: | Line 251: | ||
| }; | }; | ||
| </code> | </code> | ||
| - | Now ''%%testLabel%%'' will be using the ''%%PostfixedLabel%%'' internally, but with no indication to the user of the object that this is the case. This allows to extend the functionality of a component completely transparently, especially in combination with functions which do return an ''%%UIComponent%%'' and similar. | + | Now ''%%testLabel%%'' will be using the ''%%PostfixedLabel%%'' internally but with no indication to the user of the object that this is the case. This allows us to extend the functionality of a component completely transparently, especially in combination with functions that return a ''%%UI component%%'' and similar. |
| ===== An important note about the component hierarchy ===== | ===== An important note about the component hierarchy ===== | ||