vb.net free barcode dll Defining a Task Flow with Page Fragments in Java

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Defining a Task Flow with Page Fragments
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When you create a task flow, there is an option Create with Page Fragments, as shown in Figure 13-2. This sets up the task flow to deal with page fragments. You can then build the task flow exactly as you did before. The only difference is that when you double-click a view activity, JDeveloper will display the Create New JSF Page Fragment dialog. To all intents and purposes, this is exactly the same as the JSF pages you have been creating already, but these are subpages with a .jsff extension. You can also create a page fragment by selecting File | New and, from the New Gallery dialog, selecting JSF and then JSF Page Fragment. TIP You can convert an existing task flow, based on pages, to one based on page fragments. To do this, right-click in the task flow visual editor and select Convert to Task Flow with Page Fragments.
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Consuming a Task Flow with Page Fragments in a region
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Having created a task flow with page fragments, the next step is to embed that task flow within a region on a page. To do so, simply drag and drop the task flow from the Application Navigator onto the appropriate area on the page and select region.
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This will create a region on the page that references the task flow, and it is within this region the task flow navigation will happen at runtime.
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Task flow embedded in a region
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Task Flow Trains
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A common use case with application flow is where a task requires the user to step through a sequence of pages, or fragments, possibly allowing the user to navigate back to a previous page or to jump ahead in the page sequence. For example, entering the details for a new customer might involve separate pages for entering the name, contact details, and credit details before committing the data. After entering the name and contact details, the user might want to navigate back and correct the name before jumping ahead to the credit details page. This behavior can be implemented in a special type of task flow called a train.
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Building Application Flow
Creating a Task Flow Train
To create a train, as shown in Figure 13-2, use the Create Train option. Selecting this option defines the task flow as a train, and will automatically create control flows between the view activities when they are dropped onto the task flow. Having created the task flow train, you can call it, or embed it as a region, just like any other task flow.
Train Navigation
Having created the page or fragment for each train stop, you will want to display a train navigation component to allow the user to move between the different train stops. To do this, drag and drop an ADF Faces Train component from the Component Palette onto the page. This is a UI component that can be found on the Component Palette when designing a JSF page. You need to do this on each page that is a train stop. JDeveloper will automatically bind the component so that it performs the navigation to the appropriate page when selected.
Train component
The final step is to define the display name for each train stop as it will appear in the train navigation component. You might expect to set a property on the view activity for this, but at the
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time of writing, this has to be done through the Structure window. Right-click the train-stop and insert a display-name and set the Text property on this component.
Task Flow as Dialogs
A further option for using task flows is to display a task flow as a pop-up window. So, instead of appearing as a separate page in the browser, or within a region, a task flow can be displayed in a modal dialog.
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