gecko-dev/widget/public/nsIListBox.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsIListBox_h__
#define nsIListBox_h__
#include "nsIListWidget.h"
#include "nsString.h"
// {F8030014-C342-11d1-97F0-00609703C14E}
#define NS_ILISTBOX_IID \
{ 0xf8030014, 0xc342, 0x11d1, { 0x97, 0xf0, 0x0, 0x60, 0x97, 0x3, 0xc1, 0x4e } }
/**
* Initialize list box data
*/
struct nsListBoxInitData : public nsWidgetInitData {
nsListBoxInitData()
: mMultiSelect(PR_FALSE)
{
}
PRBool mMultiSelect;
};
/**
* Single or multi selection list of items.
* Unlike a nsIWidget, The the list widget must automatically clear
* itself to the background color when paint messages are generated.
* The listbox always has a vertical scrollbar. It never has a
* horizontal scrollbar.
*/
class nsIListBox : public nsISupports {
public:
/**
* Set an item at the specific position
*
* @param aItem the item name. The item has to be null terminated
* @param aPosition the position the item should be inserted at
* 0 is at the top of the list
* -1 is at the end of the list
*/
NS_IMETHOD AddItemAt(nsString &aItem, PRInt32 aPosition) = 0;
/**
* Finds the first occurrence of the specified item
*
* @param aItem the string to be filled
* @param aStartPos the starting position (index)
* @return PR_TRUE if successful, PR_FALSE otherwise
*
*/
virtual PRInt32 FindItem(nsString &aItem, PRInt32 aStartPos) = 0;
/**
* Returns the number of items in the list
*
* @return the number of items
*
*/
virtual PRInt32 GetItemCount() = 0;
/**
* Remove the first occurrence of the specified item
*
* @param aPosition the item position
* 0 is at the top of the list
* -1 is at the end of the list
*
* @return PR_TRUE if successful, PR_FALSE otherwise
*
*/
virtual PRBool RemoveItemAt(PRInt32 aPosition) = 0;
/**
* Gets an item at a specific location
*
* @param anItem on return contains the string of the item at that position
* @param aPosition the Position of the item
*
*/
virtual PRBool GetItemAt(nsString& anItem, PRInt32 aPosition) = 0;
/**
* Gets the selected item for a single selection list
*
* @param aItem on return contains the string of the selected item
*
*/
NS_IMETHOD GetSelectedItem(nsString &aItem) = 0;
/**
* Returns with the index of the selected item
*
* @return PRInt32, index of selected item
*
*/
virtual PRInt32 GetSelectedIndex() = 0;
/**
* Select the item at the specified position
*
* @param PRInt32, the item position
* 0 is at the top of the list
* -1 is at the end of the list
*
*/
NS_IMETHOD SelectItem(PRInt32 aPosition) = 0;
/**
* Deselects all the items in the list
*
*/
NS_IMETHOD Deselect() = 0;
/**
* Set the listbox to be multi-select.
* @param aMultiple PR_TRUE can have multiple selections. PR_FALSE single
* selections only.
* @return void
*
*/
NS_IMETHOD SetMultipleSelection(PRBool aMultipleSelections) = 0;
/**
* Return the number of selected items. For single selection list box this
* @return the number of selected items
* can be 1 or 0.
*
*/
virtual PRInt32 GetSelectedCount() = 0;
/**
* Retrieves the indices of the selected items.
* @param aIndices Array to hold the selected items. Use GetSelectedCount to
* determine how large the array needs to be.
* @param aSize Size of the aIndices array
*
*/
NS_IMETHOD GetSelectedIndices(PRInt32 aIndices[], PRInt32 aSize) = 0;
/**
* Sets the indices of the selected items.
* @param aIndices Array to hold the selected items. Use GetSelectedCount to
* determine how large the array needs to be.
* @param aSize Size of the aIndices array
*
*/
NS_IMETHOD SetSelectedIndices(PRInt32 aIndices[], PRInt32 aSize) = 0;
};
#endif // nsIListBox_h__