Forms

A form is a specific kind of selection list, where all items (fields) have some editable content.

A form can be in the View state or in the Edit state. The item layouts and functionality are different in these states:

In the View state, the items are not editable. The form functions and looks exactly like a similar selection list. Items can be selected to perform an application-specific function.
In the Edit state, the user can edit all the fields. Forms can contain text fields (alphanumeric or numeric content), pop-up fields and sliders.

Forms work with single click. The view state of the form follows list behavior. Edit state works with single click but it has the highlight always visible to indicate the active form item. Note that the entire form component item should be touch sensitive in normal state. This means that even if the user does not touch the edit field but instead the field header, the item is still activated.

The user can switch from the View state to the Edit state using the Edit command in the Options menu. In the Edit state, the contents of the form can be accepted using the right softkey labeled as Done. The form then returns to the View state.

Figure 1. An example form

The following table lists the default touch events for forms:

Table 1. Default touch events for forms
User action	State change	Feedback
In Edit State
Touch down on item	No change	Highlight is shown on the item and focus shifts to the item. Tactile: Basic list effect and audio feedback is provided with touch down event. Note: Only form-specific feedback is provided. No sensitive edit feedback provided on editor item in the form.
Touch release on item	Item is activated. When the user moves a cursor to a text field, the cursor is placed at the end of the text in the field. If the field is empty, the cursor is placed at the beginning of the field. Touch release on a radio button list item selects the item and closes the pop-up.	Highlight remains on the item. In case of a radio button list, highlight stays on the full list, and not on any single selection item. Tactile: Basic list effect provided with release event.
Touch down and hold on item	Inactive	Tactile: No effect
Touch down and move inside form	Refer to Dragging and flicking events	Highlight remains on the item that is currently active, when the user starts to move. Tactile: Refer to Dragging and flicking events.
Touch down and move outside the form without releasing touch.	Refer to Dragging and flicking events	Tactile: Refer to Dragging and flicking events.
Touch down and release outside the radio button list	Radio button list is closed.	Tactile: Pop-up effect is provided with touch down event.

In View State
Touch down on item	No effect	Highlight is shown. Tactile: Basic list effect and audio feedback is provided with the touch down event.
Touch release	One of the following occurs: Item is activated. Item get editable. Item opens context specific Options menu.	Highlight disappears. Tactile: Basic list effect is provided with touch release event. If the touch release opens a pop-up, the pop-up open effect is provided with the touch release. If theme effects are ON, then increasing long touch effect with touch release is provided.
Touch down and hold	Inactive	Tactile: No effect
Touch down and move inside form	Refer to Dragging and flicking events	Tactile: Refer to Dragging and flicking events.
Touch down and move outside the form without releasing touch.	Refer to Dragging and flicking events	Tactile: Refer to Dragging and flicking events.

Using forms in applications

The API to use for creating forms is the Form API. For implementation information, see Using the Form API.

Typically, a form will be derived from the class CAknForm and the methods SaveFormDataL() and DoNotSaveFormData() will be implemented by the developer. These are called when users switch from edit mode to view mode and are prompted by the form as to whether they wish to save their modifications.

For customization, the class CAknForm provides a single-line or double-line layout and it is possible to use icons on forms.

In the following example, the form is pushed on the cleanup stack before ConstructL() (a potentially leaving method) is called, and popped off before ExecuteLD().

CAknExFormAdd* form = new(ELeave) CAknExFormAdd;
CleanupStack::PushL(form);
form->ConstructL();
CleanupStack::Pop();
form->ExecuteLD(R_AKNEXFORM_TEXT_FIELD_DIALOG);

Parent topic: List types

Related APIs

Dialogs API