com.softwareag.mobile.runtime.toolkit.ui.controller

Interface IViewController

All Superinterfaces:

IController

All Known Implementing Classes:

AbstractViewController, TransitionStackController

public interface IViewController
extends IController

The IViewController interface defines methods and delegates supported to manage the lifecycle of views and it's controllers. The default implementation is AbstractViewController. It provides a default implementation that you can overwrite in your controller implementations. The IViewController interface is designed

• to control view's life cycle
• to control view's visibility
• to add / hide back button based on the transition stack hierarchy
• to change visibility of elements

Version:

9.6.0.0000-0237

See Also:

TransitionStackController}, AbstractViewController}, IController}

Method Summary

Methods

Modifier and Type	Method and Description
void	addBackButton() This method is called to creat and add a back button as part of the IViewController implementation.
com.softwareag.mobile.runtime.nui.nUIViewDisplay	createView() Creates a new instance of the nUIViewDisplay subclass managed by this IViewController implementation.
com.softwareag.mobile.runtime.nui.nUIViewDisplay	getViewDisplay() Returns the nUIViewDisplay instance managed by this IViewController implementation.
boolean	hidesBackButton() Returns true if this IViewController implementation hides the back button even if it is not the first view controller in the TransitionStackController stack hierarchy.
boolean	isVisible(com.softwareag.mobile.runtime.nui.nUIObject element) Checks if the given element is visible.
void	onBackButtonEvent(com.softwareag.mobile.runtime.nui.nUINavbuttonElement backButton) This method is called when the back button is selected.
void	onHideView() This methods gets called when the view becomes hidden on a pane.
void	onShowView() This method is called when the view becomes visible on a pane.
void	onTransitionFrom() This method is called right before the view is transitioned off the screen by a TransitionStackController.
void	onTransitionTo() This method is called right after the view is created and before it is transitioned on to the screen by a TransitionStackController.
void	resetView() Removes reference to the view and destroys it.
boolean	setVisible(com.softwareag.mobile.runtime.nui.nUIObject element, boolean visible) Hides or makes the given element visible in the view.
void	setWindowPane(int pane) The integer identifier of the pane will be set automatically using this method by TransitionStackController or by AbstractApplicationController.

Methods inherited from interface com.softwareag.mobile.runtime.toolkit.ui.controller.IController

getTransitionStackController, getWindowPane, stackTransition, transition

Method Detail

onTransitionTo

void onTransitionTo()

This method is called right after the view is created and before it is transitioned on to the screen by a TransitionStackController. Overwrite to add, remove or customize controls programmatically or load data in the background. This is the entry point for all business logic that needs to be executed for a view.

See Also:

TransitionStackController}

onTransitionFrom

void onTransitionFrom()

This method is called right before the view is transitioned off the screen by a TransitionStackController. Overwrite to save data or execute any logic needed right before the view will be removed.

See Also:

TransitionStackController}

onShowView

void onShowView()

This method is called when the view becomes visible on a pane. AbstractApplicationController#showPane(int) triggers this call.

onHideView

void onHideView()

This methods gets called when the view becomes hidden on a pane. AbstractApplicationController#hidePane(int) triggers this call.

setWindowPane

void setWindowPane(int pane)

The integer identifier of the pane will be set automatically using this method by TransitionStackController or by AbstractApplicationController. This value is accessible by IController.getWindowPane()

Parameters:

pane - integer identifier of pane defined in Constants

createView

com.softwareag.mobile.runtime.nui.nUIViewDisplay createView()

Creates a new instance of the nUIViewDisplay subclass managed by this IViewController implementation. Overwrite this method if you want to be notified when a view is created or if you need to do any changes programmatically at runtime.

If you want to get the IViewController managing a given view, use AbstractApplicationController#getViewController(nUIViewDisplay)

Returns:

the view created and associated with IViewController

resetView

void resetView()

Removes reference to the view and destroys it.

See Also:

#createView()}

getViewDisplay

com.softwareag.mobile.runtime.nui.nUIViewDisplay getViewDisplay()

Returns the nUIViewDisplay instance managed by this IViewController implementation.

Returns:

current nUIViewDisplay instance associated with this controller.

See Also:

#createView()}

hidesBackButton

boolean hidesBackButton()

Returns true if this IViewController implementation hides the back button even if it is not the first view controller in the TransitionStackController stack hierarchy.

Overwrite to change the default behavior of adding back buttons. To customize the back button overwrite addBackButton(). If you are not using TransitionStackController, use addBackButton() to add back buttons programmatically.

Returns:

true if the back button should not be added

See Also:

TransitionStackController}

addBackButton

void addBackButton()

This method is called to creat and add a back button as part of the IViewController implementation. The default implementation in AbstractViewController, based on TransitionStackController, uses the header text of the previous AbstractViewController in the stack hierarchy. If there is no header text to be used, BACKBUTTON_DEFAULT value from the language text resources will be loaded and used.

onBackButtonEvent

void onBackButtonEvent(com.softwareag.mobile.runtime.nui.nUINavbuttonElement backButton)

This method is called when the back button is selected. The default implementation based on AbstractViewController and TransitionStackController will just go back in the stack hierarchy by calling TransitionStackController.popViewController()-

Overwrite this method to implement custom workflow or behavior.

Parameters:

backButton - the nUINavbuttonElement instance that was selected

isVisible

boolean isVisible(com.softwareag.mobile.runtime.nui.nUIObject element)

Checks if the given element is visible.

Parameters:

element - the given element

setVisible

boolean setVisible(com.softwareag.mobile.runtime.nui.nUIObject element,
                 boolean visible)

Hides or makes the given element visible in the view.

Parameters:

element - target element, which belongs to the view

visible - if true makes the element visible, otherwise hides it

Returns:

true if operation was successful