Web Dynpro ABAP, a NetWeaver web application user interface tool of SAP PDF · Designing a Web Dynpro Component. Ulrich Gellert, Ana Daniela Cristea. Request PDF on ResearchGate | Web Dynpro ABAP for practitioners | Web Dynpro ABAP, a NetWeaver web application user interface tool of SAP enables web. Web Dynpro ABAP for Practitioners Ulrich Gellert c/o S þ P LION AG Robert- Bosch-Str. 9 Heddesheim Germany [email protected]
|Language:||English, Spanish, Japanese|
|Genre:||Health & Fitness|
|Distribution:||Free* [*Sign up for free]|
Web Dynpro Abap For Practitioners Author Ulrich Gellert Oct - [Free] Web Dynpro. Abap For Practitioners Author Ulrich Gellert Oct [PDF] [EPUB] -. learn more and more about Web Dynpro ABAP, from chapter to chapter. Moreover, In Chap. 1, we explain what means the Web Dynpro integrated in a SAP. Hi,Can anyone please provide me the study material for WEBDYNPRO ABAP / content_bilder/Hauptnavigation/SAP_NetWeaver/WebDynpro/ondieslinfuncton.cf
To do this, we use the Action tab Fig. As we can see, each action has a corresponding event handler method, automati- cally generated by the Framework. After creating an action, we can assign it to an UI element that has attached an event Fig.
In this way, we can insert the source code. The user enters his name that we use to show a greeting message with the help of textView UI element. After this, we reset the inputField UI element. For more details about Methods, please see Chap. In this tab, we can set the view lifetime: A view controller is always deleted as soon as the corresponding view is no longer displayed on the user interface. It is used when a view is displayed only once and not repeatedly.
Listing 3. We have to specify that, for each view controller, the usage of the corresponding component controller is automati- cally created.
Additionally, we can create our own attributes. To access these attributes, we use the self-reference: Data required across different views can be stored in his context. Properties, Attributes, Events and Methods. When the user interacts with a view, their interaction will cause a request to the server. In response, one or more views that build the current screen will require to be replaced with other views. This is possible through navigation links among the various views in the window.
Each Web Dynpro component can have several Windows. A view or several Views are generally embedded in a Window. In every window, at least one view is marked as default.
To mark as default, after right-clicking on the view we choose Set as default from the contextual menu. For a Window, these plugs can be of Standard, Startup or Resume type. As we can see, the Framework generates for each window an inbound plug of Startup type and an event handler method Fig. By using this event handler method, we can read, for example, the URL parameters from a Web Dynpro application.
To do this, we have to create a Web Dynpro Application Fig. For each application, the Framework generates an URL. In the same time, we can specify here how the Messages are handled: To run the application, we can use the Execute button or we can copy and past the URL into the browser Fig.
In Fig. To work with the debugger, we can create Breakpoints at the point where the program should pause Fig. For example, we can choose to execute the program line by line — Single step, or to execute the program up to the next Breakpoint — Continue.
By using the New Tool button , we can open a selection window that offers the possibility to access additional functionalities. As we can see in Fig. We are able to see not only the context structure, but also to display the runtime object, by choosing from the contextual menu Display Runtime Object Fig. Logon Language, Client, User Password, etc. In the webdynpro! As a result of our changes, in the logon page we have to provide only the User and the Password, through a popup window, and we are able to change our logon password Fig.
The main purpose of this chapter is to show how to realize all the development objects to be used in the future Web Dynpro applications. Therefore, we present not only the modality to create the various development objects in the ABAP Dictionary, but also the modality to use them in realizing Web Dynpro applications.
ABAP programming language has a number of ten elementary data types that we can use in our programs. When we want to create global data types by using the ABAP Dictionary, we have to use dictionary built-in types. We need them for reasons of compati- bility with the external data types.
The elementary type can be a domain and a build-in type. For a data element, we can create documentation F1 Help with Goto! Docu- mentation! We create a text that describes the content of our data element Fig. To be able to use it in a Web Dynpro application, in other repository object, as parameter in GUI programming, etc.
To do this, we create a new data element and we choose the elementary type — domain Fig. In this case, we can use an interval to limit the values that the user may enter Fig. This table holds all the system currency. After we create a structure, we have to maintain the enhancement category: Enhancement Category, from the menu.
We will use this table later, for our Web Dynpro example. All the candidates should be 18—45 years old and live in an EU country.
After creating the table, we have to enter a short description along with the delivery and maintenance Fig. As can be seen, we have used the data elements created hereinbefore: When we want to create a new data element, we write its name and, with double-click, we activate the forward navigation. Before being able to activate this table, we have to maintain the technical settings Fig. We have to maintain the enhancement category: Enhancement Category, from the Menu.
We hold here all the EU Member states information, as follows: The structure of this table is presented in Fig. The candidates can live only in an EU country. Therefore, we create a 1 to CN relationship between the tables. CN relation- ship.
We can create contents with Utilities! Table content! Create Entries from Menu Fig. To display the content: Display from Menu Fig. Tip With Utilities! Database Object! Database Utility or through the transaction SE14, we can use the Database Utility to activate and adjust a database table, in case we have changed its structure and an activation error is shown.
To create a search help, we can use the context menu of our package Fig. As can be seen at Data collection! A search help can have the following parameters: LPos represents the parameter position in the hit list: We can test a search help Fig. Afterwards, we want to use this search help in a Web Dynpro application.
We create a search option for a competitor. The list of IDs is limited to the number of competitors. In this way, we facilitate the input. After we enter the search help name, we have to create the search help attach- ment, and to save and activate the table Fig. When we use this column in Web Dynpro, the Framework creates a special icon to be used at the runtime to call the input help. Moreover, we can use the keyboard key F4 to call an input help. When we create a view, we can choose one of the four view types Fig.
As result, the join conditions are generated Fig. By using this view, we can create the context node structure for our Web Dynpro application and so we simultaneously select the logically connected data, from two tables. For the line type, we can use an existing type table, structure, view,. The typical use of table type is the declaration of an internal table.
Another example of using table type is to populate with values a context node via a supply function. In the next chapter, we show how we can use this table type to populate a context node. Our case consists of exactly one table, and the lock argument is the primary key of this table. The lock mode is set to write, but can be overwritten. With the SE37 transaction we can see the two generated Function Modules: Figure 4.
SAP offers a lock mechanism required to provide two transactions by simulta- neously changing the same data in the database. The lock table represents a table in the memory of the enqueue server and is used to manage all the locks in the system. This lock table is checked every time when the enqueue server receives a lock request. A program sends, to the lock table, the key of the table entries it wants to lock; if no lock is set, the request is accepted and the new lock is written in the lock table.
If a lock is set, the request collides with an existing lock and the request is rejected. Benjamin Franklin Abstract This chapter mainly focuses on the context nodes and attributes statically realized at design time. In this respect, we will explain not only the role and modality to create context nodes and attributes, but also the modality to access the values stored in the attributes of the nodes. An attribute is a context entity that has certain properties and can be directly created in the root node CONTEXT, or as a child for another node.
Usually, a node is used to group more attributes that belong together. A context node can have attributes or can hold other nodes, but a context attribute cannot have other attributes or nodes.
This is automatically created when the controller is initialized and all the nodes and attributes we created are children of this root node. The data hold in the context nodes and attributes are transient, they exist only for the lifetime of the controller. A view controller is always deleted as soon as the corresponding view is no longer displayed on the user interface. It is used when a view is displayed only once and not repeatedly. Additionally, Property tab offers the possibility to define the usages Fig.
Create Controller Usage 22 3 Designing a Web Dynpro Component We can define a usage to be able to access the methods of another internal controller or of an interface controller, if the usage has been defined for an external component.
We have to specify that, for each view controller, the usage of the corresponding component controller is automatically created. We can use it, for example, to call a user-defined method. Additionally, we can create our own attributes.
Hereunder, in our examples, we will see how we can cross-component access the methods and the attributes defined here. When the user interacts with a view, their interaction will cause a request to the server. In response, one or more views that build the current screen will require to be replaced with other views.
This is possible through navigation links among the various views in the window. Each Web Dynpro component can have several Windows. A view or several Views are generally embedded in a Window. The first view created at the WD component creation is directly embedded into the Window. In every window, at least one view is marked as default.
A default view is the first view displayed when the window is called. The first embedded view is marked as default, but we can change it. To mark as default, after right-clicking on the view we choose Set as default from the contextual menu.
For a Window, these plugs can be of Standard, Startup or Resume type. As we can see, the Framework generates for each window an inbound plug of Startup type and an event handler method Fig.
By using this event handler method, we can read, for example, the URL parameters from a Web Dynpro application. To do this, we have to create a Web Dynpro Application Fig. In Fig. To work with the debugger, we can create Breakpoints at the point where the program should pause Fig. Click Fig. By using the Buttons from the Control Area, we can control the program — Single flow. For example, we can choose to execute the program line by line — Continue. In the Special Tools section, we can find the created tool, to be used for a better debugging of the Web Dynpro components Fig.
In the webdynpro! In the lower part of the Error Page tab, we can find the Configuration button for the system logon. Here, we can define our own settings by choosing from the lists, or we can use the global settings Fig. The main purpose of this chapter is to show how to realize all the development objects to be used in the future Web Dynpro applications.
Therefore, we present not only the modality to create the various development objects in the ABAP Dictionary, but also the modality to use them in realizing Web Dynpro applications. When we want to create global data types by using the ABAP Dictionary, we have to use dictionary built-in types. These predefined types are different from the elementary data types. We need them for reasons of compatibility with the external data types. The elementary type can be a domain and a build-in type.
For a data element, we can create documentation F1 Help with Goto! When we want to verify if the user have entered his first name, we have to define an interface method in the component controller of this component, a method that verifies if this attribute has a value or it is empty. The coding presented in Listing 6.
After this, we verify if this attribute has a value or it is empty. In case this 6. In this case, we have used the easy way and not the best one. In the Chap. If a method is marked as interface, we can cross-component access it. This means that we can call it from our onactionshow event handler method after we define a usage at the view level Fig. Ralph Waldo Emerson Abstract As we have seen in the previous chapters, in the Methods tab of a View we find various types of methods generated by the Framework, and we can also create our own methods.
The purpose of this chapter is to present the role and the modality to use the various methods generated by the Framework and the modality to realize our own methods.
Each view has exactly one view controller. The view controller can contain methods for data retrieval or for processing user inputs.
As we have seen, each view has a Methods tab where we can create our own user-defined methods or we can find the methods generated by the Framework. In each Method tab of a View, we can find or create three types of methods: This kind of methods respond to actions or to events. An example of such a method is generated by the Framework when we define an inbound plug into a View. Another example is a method generated from the Framework when we create an action.
We can use this kind of methods to create User-defined instance methods. Another example is the Hook Methods generated by the Framework. Supply Function: When we create a node and define a supply function for it, the Framework generates a corresponding supply function method used to populate with data a context node. The Hook Methods are called in a specific sequence according to a phase model.
After generation, these methods are empty, but can be filled with source codes in case we want to interfere in a certain step of this phase model. Table 7. The Fig. It is automatically called when the controller is initialized for the first time. We have many examples where we can use this method, for example: The component structure and the view layout are presented in Fig.
Listing 7. Same as the case when this node is created at the design time, we can use the name of the development objects created in the ABAP Dictionary as Structure or Views 7. It is automatically called when exiting the controller, and can be used for executing closing statements. We can use wdDoExit Hook method to release a lock that has been set for this table to synchronize the access of several WD applications to the same data.
For the dynamically programming of the UI elements, we have many classes and methods that help us as application developer to dynamically modify a view. The WD component structure and the context node are presented in Fig. To import a file in this folder, we right-click on the WD component name and, from the contextual menu, we choose Create!
Mime Object! We can almost use the same example as for our first exercise. The view layout is presented in Fig. The text parameter helps us to set the label text. To embedding the UI elements into the layout, we need to specify the arrangement of these elements. For this, we have used the FlowLayout layout: The UI Element Group has the same layout. After this, we create an InputField UI element: In this case, we dynamically create a data binding for this property to the 7.
Until now, we have seen how we can create a data binding at the design time. This UI element has an event associated. For a linkToAction UI element, we can define a hypertext link or we can use an image instead a text. All we have to do now is to create an action named Next Fig. When the user presses the linkToAction UI element, the Framework triggers the event handler method onactionnext Listing 7. We use the state parameter to dynamically set the property with the same name of the InputField UI element.
Tip WdDoModifyView should be used only for UI manipulation and not for dynamically creation of the context nodes and attributes. The View layout is presented in Fig. In our first example, we have already seen the default context menu displayed by the Web Dynpro Framework when the user presses right-click on an UI element. To exemplify how we can use this method to dynamically create context menus, we use the example from the wdDoBeforeAction Hook method.
In this case, we offer to the user the possibility to personalize the field he wants to be mandatory. He will be able to choose between his first name as mandatory field and his last name as mandatory field.
When he chooses the first name as mandatory, we will mark the corresponding field with a red star, and when he chooses the last name, we will mark the corresponding field with a red star. In the default mode, the first name is set as mandatory. To create this example, we have to perform some modifications into the last application. In this case, we have to set dynamic the state properties of the two inputField UI elements, corresponding to first name and last name.
In this way, at design time, the two inputField UI elements are not marked as mandatory, anyway. To set in the default mode the first name as mandatory, we use the wdDoInit Hook method we have just learnt about Listing 7. To offer to the end user the capability to dynamically choose what value he wants to be mandatory from the two optional values, we have to code the wdDoOnContextMenu Hook method Listing 7.
We need the two menu options to offer to the user the possibility to choose between options: With the second data statement, we create two local variables required to read from the context attributes the status properties corresponding to the two inputFields UI elements firstname, lastname and a local reference required to access our context node. From the parameters of this class, we have used: To associate the action that will be triggered when the user presses the respective option text: To set if this option is active or inactive.
By doubleclicking on the TYPE, the forward navigation is open and we can see a data element with a Domain as an elementary type. This domain has two fixed values: Before we effectively create the two menu options, we have to check which one of the two state proprieties is set required and which one is set normal.
In case the firstname is normal and the lastname is required, we create the two menu 7. Then, we add the two created menu options of menuActionItem type to our context menu and display the respective menu by using the wdDoOnContextMenu Hook method, returning the parameter named menu.
Provides, not inherits from the container contextMenuId: Set with the IDs of our context menu options Fig. In case the user chooses the last name as mandatory, we have to set required the property state of the corresponding UI element and normal the property state of the UI element corresponding to the first name Fig. In case the user chooses the first name as mandatory, we have to set required the property state of the corresponding UI element and to set normal the property state of the UI element corresponding to the last name Fig.
When a controller is called, these methods are called first. We have seen that a supply function can be assigned to each context node of a controller Fig. An alternative for the supply function methods can be the wdDoInit Hook method, if we know that the context is filled only once at initialization and it is not invalidated afterwards.
In this case, we copy our example from the wdDoModifyView Hook method and we create two extra user-defined methods: By using this method, we show an error message. The Listing 7. If this attribute is empty, we have to show an error message. We need inbound plugs and outbound plugs to define the navigation between two views.
These plugs are the entry and the exit point for each view. We create an example, a WD component that has two Views. This navigation is possible through a navigation link between the views, in the window Fig. Every time we create an outbound plug for a view, a special method is added to its interface. The event handler method has the following statement: All the views within a window can be connected to each other by using navigation links.
We can also create navigation by right-clicking on the output plug name Fig. This is possible through the navigation link defined between these views. We have used this type of methods every time we have assigned an action to an UI element. As we have seen, the action is defined in the Action tab and the corresponding event handler method is generated by the Framework Fig. We have seen that the outbound plugs are the starting point of navigation, called in any method of the view controller by using the statement: This method allows also parameter transfer.
We will pass a reference to Message Manager from a view to another view, via an outbound parameter. When an inbound plug is called, the handler method that is uniquely assigned to this inbound plug is called. This method is automatically generated in the view controller when the inbound plug is created. Tip These kinds of event handler methods are not used to pass application data. In matters of principle, stand like a rock. Here, we are going to present the various types of existent Layouts and the modality to use them, either in static or in dynamic variant.
The layout helps us to manage the arrangement of the UI elements within their parent container. All the UI elements within a view are hierarchy arranged. It is of TransparentContainer type and has initially assigned to it the FlowLayout layout. Table 8. For a better understanding, we create a Registration Form with three fields: The WD component structure and the view layout are presented in Fig. Each UI element reference to a LayoutData object and every UI element inserted within a container must have the data layout that matches the respective container.
We can see that, for the layout data, we can set two properties: The default of these values is cellDesign — padless there is no distance between the row and the edges and vGutter — none no additional distance. An example of using this class we have seen in the wdDoModifyView example. We can specify the number of columns in the grid by using the property colCount. The number of rows depends on the number of the UI elements added to the container. We create the same example, but in this case we use GridLayout layout for the Group container Fig.
In this case, at runtime we have: We want the Save button to remain alone in its row. To do this, we have to use an InvisibleElement Fig. This UI element is an invisible element on the screen and can be used to fill an empty cell in the GridLayout.
Listing 8. InputField for the user first name and the corresponding label. With MatrixLayout, we can produce a grid with a variable number of columns per row.
In this chapter, we are going to present some of the UI elements, included in the categories: Each UI element will be illustrated by an example, showing the modality of using it either in static or in dynamic variant. A UI element is a User Interface element we use to create a screen for the end user. Shows a quick info text when the user passes the mouse pointer over the UI element Visible: Determined if an UI element is visible in the screen or not Enabled: Specified if the UI element is active or inactive By using the Class Builder transaction SE24, we can see different classes along with their inheritances and attributes.
Figure 9. Most of the UI elements properties can be bound to different context nodes or attributes. In this way, we can manipulate the UI elements via the data held in the context. Each bindable property of a UI element has a certain type. When this U. The UI elements, along with the aggregations, determine the appearance and behaviour of the UI elements on the screen.
The Web Dynpro UI elements are divided in categories. Hereunder, we present some of these categories. To specify the periodicity, we have to use its delay property. As we have mentioned above, most of the UI element properties can be bound. Hereunder, we show a table with some of the TimedTrigger properties that can be bound and the attribute type in case the property is bindable Table 9. Table 9. Listing 9. At runtime, we have Fig. Delay 5 Fig. The same properties, events and aggregations as in the View Designer are available.
Hereunder, we present a table showing the correspondence between the view designer name and the runtime name, with the proper types, in case of dynamic programming of a TimedTrigger UI element Table 9. Hereunder, we present a list with some of the ButtonChoice properties that can be bound, and the attribute type in case the property is bindable Table 9.
As we can see in Fig. The WD component structure and the view context structure are presented in Fig. For the two created options, we set actions divide and power , and we use the hotkey property to offer to the end user the capability to press the respective key combination to trigger the associated event handler method.
When the user interacts the first time with the ButtonChoice UI element, an action can be selected, and the Framework triggers the proper event handler 9. The last selected action remains on the ButtonChoice UI element after the action has been executed. This behaviour is possible through the property repeatSelectedAction Fig. The last selected action remains on the ButtonChoice UI element after the action has been executed Fig. The way we can use try. Hereunder, we present some of the UI Elements included in this category.
We have many possibilities to populate with values the dropdown list. Hereunder, we present a table with some of the DropDownByKey properties that can be bound, and the attribute type in case the property is bindable Table 9. The context structure is presented in Fig. Similar to the DropDown lists, we have here RadioButtons grouped by key and by index.
The view context has the same structure. To specify the number of columns in which the RadioButtonGroup elements are grouped, we can use the property colCount. This property can be personalised by an administrator. We create a WD Component, a registration form with three views Fig. The layout of this view is presented in Fig. All these are schematically shown in Fig. When we create an outbound plug for a view, a fire method is added to its interface. We create a WD Component, a registration form with the structure presented in Fig.
To add tabs, we right-click on the tabStrip name and, from the contextual menu, we choose Insert Tab. When the user presses the Next button, we navigate to the next tab and we show the data entered by the user in the registration form of the first tab. The view Layout is presented in Fig. This property set the name of the selected tab. The view context structure is presented in Fig. When the user presses the Next Button, the Framework triggers the event handler method onactionnext Listing 9.
We create a WD component with the structure presented in Fig. As design options, it has: Standard, Emphasized and transparent. For our example, we have the default design: To see on screen the other PageHeaderArea designs, we can choose values from the list, one by one, and see the result in the view designer, or we can run again the application and see the different changes.
In the system, we can find two WD components where we can see the UI elements and the effect of changing certain properties on these UI elements. The resulted runtime is presented in Fig. Its navigation list can have many levels. In a contextualPanel UI element, we can insert three types of elements: In our example, we have used two FreeContextualArea elements.
We can set the header to be expandable or no. We create a WD Component with the structure presented in Fig. The first element is used to show the candidate information, and the second Tray is used to show some details about the selected candidate.
These details are: In the MIMEs folder we import three pictures with the flags we have to display when the user chooses a competitor from that country. In our case, we have chosen the option MenuActionItem Fig. Hereunder, we show a list with some of the Tray UI elements properties that can be bound, and the attribute type in case the property is bindable Table 9. To show the concurrent information and the corresponding details, we have created a context node with 9.
To realise this, we encode the wdDoInit Hook method Listing 9. As we have seen, the messages are displayed by default in the upper part of the screen.
The message location can be moved by adding a MessageArea UI element. We create an example to filter an input from the end user.
To show these messages, we use a MessageArea UI element. There are small programs used to test the regexes, which offer the possibility to test the regexes created before using them. By using regexes, we can filter the values that the user enters in a Web Dynpro screen.
This is the place where all the messages will be displayed. Otherwise, we use the same method to display an error message. Because we want to show to the user whether the value he entered in the input field is a string or not, we use a parameter required to integrate, in the string that he sees on the screen, the value he has just entered.
In the context view, we need two context nodes: The context node structure is presented in Fig. Its attributes are: We use the attributes of this context node to hold every new record.
In this case, we want to manually set the lead selection. We use the attributes of this context node to hold all the registrations. In the next step, we have to create the view layout. To insert a Table into our view layout, we can use two options: In the beginning, we explain the first option. After inserting a Table UI element into our view, we have to create a data binding. We have only to select the context node and the Framework provides the available attributes.
As we can see, our columns are created by using textView UI elements. Each attribute represents a column in our table, and for each column we can choose an UI element. After this, the standard property to be bound depends on the chosen UI element. For each attribute for which the bind option is marked, the Framework generates a proper column.
The Table UI element offers the possibility to display as many rows as we need by using the property visibleRowCount in our case, five. Web Dynpro Wizard In this case, the Wizard generates the Table UI element and we use the same procedure presented hereunder to create the data binding. After the user enters the new values Name, Date of Birth and Country , we have to add these values at the end of the other records, in the table UI element. To be able to do this, we need an action.
We need a toolbar to be able to insert a ToolBarButton in this area Fig.
In this way, it is selected the last value of the table. To influence the lead selection, we have some methods, as following: As we have mentioned above, we use this local variable to create the record ID.
After each new record, we increase this value with 1. After the user adds the records, he can reset the fields Name, Date of birth and Country, to be able to add a new record. The Listing 9. The implementation of a dynamic Table UI element with table header, design alternating, three visible rows and a column, that has a TextView UI element as cell editor, contains the following statements Listing 9.
Hereunder, we show some of the roadMap properties that can be bound, and the attribute type in case the property is bindable Table 9. Next and Back. This node has three attributes: The attributes are: To be able to navigate among the views, we have to create inbound and outbound plugs.
Hereunder, we show some of the PhaseIndicator properties that can be bound, and the attribute type in case the property is bindable Table 9. The content of these views is the same.
We can rename a view by right-clicking on the view name and, from the contextual menu, we choose rename. The window structure is presented in Fig. To do this, we use the wdDoInit Hook method Listing 9. The implementation of a dynamic PhaseIndicator UI element with two Phases contains the following statements Listing 9.
For this UI element, we can use: We create a WD component Fig. A context node TREE is created in the context node of the view controller. It has the cardinality 1. WHEN 'A'. WHEN 'B'. Hereunder, we present a table with some of the DataNavigator properties that can be bound, and the attribute type in case the property is bindable Table 9. In the context view, we create three attributes: It shall be bound to a context attribute that stores these categories. The most important properties of the DateNavigatorMarking element are: In our case, we have changed the properties: In this way, we have chosen Sunday as the first day of the week in our calendar.
In this way, we show 3 months in our calendar. We have chosen from the list the range option, because we want to offer the possibility to select the range of dates. We have set the starting date of our calendar. To be able to show, in the TextView UI elements, the week, the day or the month that the end-user selects in our calendar, we have used the events: We pass this value in our DAY attribute created in the context view. We pass these values in our WEEK attribute created in the context view.
At runtime, we have: Same as other UI elements, it has some properties. Hereunder, we show a table with some of the Image UI element properties that can be bound, and the attribute type in case the property is bindable Table 9. Import from the contextual menu, shown by right-clicking on the WD component name.
We use these attributes to manipulate the properties of the Image UI element. This property defines the name of the image file shown on the screen.
The layout is presented in Fig. We have used a chart of columns type, to graphically display the data contained by the columns of our database table. The View Layout is presented in Fig. We access this tool by double-clicking on the chart picture, in the view layout.
Hereunder, we present some of the UI elements included in this category. In case the configuration is correct, we receive, as output, the version number of the ADS we have installed Fig. The WD component structure has the structure presented in Fig. After this, we have to bind its properties pdfSource and dataSource to the context.
The dataSource property has to be bound to the context node that provides the data for our PDF form. This node can have the cardinality 0. Under this node, we create other context nodes. The context structure and the view layout are presented in Fig. We enter the name of the Form and then, by double-clicking, we realise a forward navigation, because this Form does not exist yet.
This action will open a pop-up window, where we have to enter the interface name Fig. Double click Fig. Drag and drop Fig.
We can manually design the layout of the table by using the tools located in the right side of the Form Builder. Adobe LifeCycle Designer Help. Then, we can run the application Fig.
Then, we have to attach an action to its onSubmit event, because the Framework triggers the attached event handler method when the user presses a special Submit button included in the Adobe Designer. We create a very simple example required to show how we can use an interactive PDF form into a view, and how we can import a PDF template into the Adobe Designer. We create a WD Component that has the view context presented in Fig.
In case the required values are correctly entered, we show an information message; otherwise, we inform him that all the fields are mandatory. In this case, we have created our own attribute in the Attribute tab Fig. In this way, we show the current data into the Form.
After this, we use the forward navigation to create our form objects: Then, we import a PDF template file into our new generated form. Through the menu Tools! Import, we can perform the importing operation Fig. We simply drag and drop the context elements onto the form layout. After this, we insert a Reset button from the Standard library, and we use the Web Dynpro Native library to insert a Submit button required to submit the data.
Then, we can run the application. Hereunder, we present a list with some of the FileUpload properties that can be bound, and the attribute type in case the property is bindable Table 9.
In the view context, we create four attributes: To upload the file, we need to add an UI element from the action category, in our case a Button. In case we search for a file by using this button, the fully qualified path is written in the input field.
This method has the following parameters: By using the Delete button, we can delete the data from the context. Tip The appearance of the UI elements can be influenced by using themes. For each of the two variants messages and exceptions , we present two possible implementation scenarios. Therefore, we start with the modality to create the texts of messages and exceptions, and we conclude with the modality of using them for the created applications.
A good user interface catches exceptions, describes the errors that occur and displays messages that contain information for the application end user. This interface has many methods we can choose to create messages. Until now, we have created only simple messages that contained text introduced in coding. In this chapter, we will create messages by using assistance class, T table, exception class and message class. For example, we can create messages: We create a WD component, a registration form for a user.
The component structure is presented in Fig. If the user fills the form with the requested data, we show an information message to inform him that the data are saved.