nsIRadioGroupContainer.h

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#ifndef nsIRadioGroupContainer_h___
#define nsIRadioGroupContainer_h___

#include "nsISupports.h"

class nsIDOMHTMLInputElement;
class nsString;
class nsIRadioVisitor;
class nsIFormControl;

#define NS_IRADIOGROUPCONTAINER_IID   \
{ 0x06de7839, 0xd0db, 0x47d3, \
  { 0x82, 0x90, 0x3c, 0xb8, 0x62, 0x2e, 0xd9, 0x66 } }

/**
 * A container that has multiple radio groups in it, defined by name.
 */
00054 class nsIRadioGroupContainer : public nsISupports
{
public:

  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IRADIOGROUPCONTAINER_IID)

  /**
   * Walk through the radio group, visiting each note with avisitor->Visit()
   * @param aName the group name
   * @param aVisitor the visitor to visit with
   */
  NS_IMETHOD WalkRadioGroup(const nsAString& aName,
                            nsIRadioVisitor* aVisitor) = 0;

  /**
   * Set the current radio button in a group
   * @param aName the group name
   * @param aRadio the currently selected radio button
   */
  NS_IMETHOD SetCurrentRadioButton(const nsAString& aName,
                                   nsIDOMHTMLInputElement* aRadio) = 0;

  /**
   * Get the current radio button in a group
   * @param aName the group name
   * @param aRadio the currently selected radio button [OUT]
   */
  NS_IMETHOD GetCurrentRadioButton(const nsAString& aName,
                                   nsIDOMHTMLInputElement** aRadio) = 0;

  /**
   * Get the next/prev radio button in a group
   * @param aName the group name
   * @param aPrevious, true gets previous radio button, false gets next
   * @param aFocusedRadio the currently focused radio button
   * @param aRadio the currently selected radio button [OUT]
   */
  NS_IMETHOD GetNextRadioButton(const nsAString& aName,
                                const PRBool aPrevious,
                                nsIDOMHTMLInputElement*  aFocusedRadio,
                                nsIDOMHTMLInputElement** aRadio) = 0;

  /**
   * Add radio button to radio group
   *
   * Note that forms do not do anything for this method since they already
   * store radio groups on their own.
   *
   * @param aName radio group's name
   * @param aRadio radio button's pointer
   */
  NS_IMETHOD AddToRadioGroup(const nsAString& aName,
                             nsIFormControl* aRadio) = 0;

  /**
   * Remove radio button from radio group
   *
   * Note that forms do not do anything for this method since they already
   * store radio groups on their own.
   *
   * @param aName radio group's name
   * @param aRadio radio button's pointer
   */
  NS_IMETHOD RemoveFromRadioGroup(const nsAString& aName,
                                  nsIFormControl* aRadio) = 0;

  /**
   * Get the radio group position and the number of radio buttons in the group.
   * that the radio button is in. If the radio button not grouped with any other
   * radio buttons this method will treat it as being in a group of one.
   * @param aRadio radio button's pointer
   * @param aPositionIndex out indicates 0-indexed position in the radio group,
   *                           or just 0 if a group cannot be found
   * @param aItemsInGroup the number of radio buttons in the group
   */
  NS_IMETHOD GetPositionInGroup(nsIDOMHTMLInputElement *aRadio,
                                PRInt32 *aPositionIndex,
                                PRInt32 *aItemsInGroup) = 0;
};

#endif /* nsIRadioGroupContainer_h__ */