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139 lines
4.0 KiB
C++
139 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsIComboboxControlFrame_h___
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#define nsIComboboxControlFrame_h___
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#include "nsISupports.h"
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#include "nsFont.h"
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class nsFormFrame;
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class nsIPresContext;
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class nsString;
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class nsIContent;
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class nsVoidArray;
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class nsCSSFrameConstructor;
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// IID for the nsIComboboxControlFrame class
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#define NS_ICOMBOBOXCONTROLFRAME_IID \
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{ 0x6961f791, 0xa662, 0x11d2, \
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{ 0x8d, 0xcf, 0x0, 0x60, 0x97, 0x3, 0xc1, 0x4e } }
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/**
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* nsIComboboxControlFrame is the common interface for frames of form controls. It
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* provides a uniform way of creating widgets, resizing, and painting.
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* @see nsLeafFrame and its base classes for more info
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*/
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class nsIComboboxControlFrame : public nsISupports {
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_ICOMBOBOXCONTROLFRAME_IID)
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/**
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* Indicates whether the list is dropped down
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*
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*/
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NS_IMETHOD IsDroppedDown(PRBool * aDoDropDown) = 0;
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/**
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* Shows or hides the drop down
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*
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*/
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NS_IMETHOD ShowDropDown(PRBool aDoDropDown) = 0;
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/**
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* Gets the Drop Down List
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*
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*/
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NS_IMETHOD GetDropDown(nsIFrame** aDropDownFrame) = 0;
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/**
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* Sets the Drop Down List
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*
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*/
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NS_IMETHOD SetDropDown(nsIFrame* aDropDownFrame) = 0;
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/**
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* Notifies the Combobox the List was selected
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*
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*/
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NS_IMETHOD ListWasSelected(nsIPresContext* aPresContext, PRBool aForceUpdate, PRBool aSendEvent) = 0;
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/**
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* Asks the Combobox to update the display frame
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* aDoDispatchEvent - indicates whether an event should be dispatched to the DOM
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* aForceUpdate - indicates whether the indexx and the text value should both be
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* whether the index has changed or not.
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*
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*/
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NS_IMETHOD UpdateSelection(PRBool aDoDispatchEvent, PRBool aForceUpdate, PRInt32 aNewIndex) = 0;
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/**
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* Asks the Combobox to update the display frame when the selection has
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* changed
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*
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*/
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NS_IMETHOD SelectionChanged() = 0;
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/**
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*
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*/
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NS_IMETHOD AbsolutelyPositionDropDown() = 0;
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/**
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*
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*/
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NS_IMETHOD GetAbsoluteRect(nsRect* aRect) = 0;
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/**
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*
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*/
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NS_IMETHOD MakeSureSomethingIsSelected(nsIPresContext* aPresContext) = 0;
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/**
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*
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*/
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NS_IMETHOD SetFrameConstructor(nsCSSFrameConstructor *aConstructor) = 0;
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/**
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* This returns the index of the item that is currently being displayed
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* in the display area. It may differ from what the currently Selected index
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* is in in the dropdown.
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*
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* Detailed explanation:
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* When the dropdown is dropped down via a mouse click and the user moves the mouse
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* up and down without clicking, the currently selected item is being tracking inside
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* the dropdown, but the combobox is not being updated. When the user selects items
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* with the arrow keys, the combobox is being updated. So when the user clicks outside
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* the dropdown and it needs to roll up it has to decide whether to keep the current
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* selection or not. This method is used to get the current index in the combobox to
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* compare it to the current index in the dropdown to see if the combox has been updated
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* and that way it knows whether to "cancel" the the current selection residing in the
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* dropdown. Or whether to leave the selection alone.
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*/
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NS_IMETHOD GetIndexOfDisplayArea(PRInt32* aSelectedIndex) = 0;
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};
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#endif
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