gecko-dev/layout/forms/nsICheckboxControlFrame.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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsICheckControlFrame_h___
#define nsICheckControlFrame_h___
#include "nsISupports.h"
class nsIStyleContext;
// IID for the nsICheckControlFrame class
// {401347ED-0101-11d4-9706-0060B0FB9956}
#define NS_ICHECKBOXCONTROLFRAME_IID \
{ 0x401347ed, 0x101, 0x11d4, \
{ 0x97, 0x6, 0x0, 0x60, 0xb0, 0xfb, 0x99, 0x56 } }
/**
* nsICheckControlFrame is the common interface radio buttons.
* @see nsFromControlFrame and its base classes for more info
*/
class nsICheckboxControlFrame : public nsISupports {
public:
NS_DEFINE_STATIC_IID_ACCESSOR(NS_ICHECKBOXCONTROLFRAME_IID)
/**
* Sets the Pseudo Style Contexts for the Check button
*
*/
NS_IMETHOD SetCheckboxFaceStyleContext(nsIStyleContext *aCheckboxFaceStyleContext) = 0;
/**
* When a user clicks on a checkbox the value needs to be set after the onmouseup
* and before the onclick event is processed via script. The EVM always lets script
* get first crack at the processing, and script can cancel further processing of
* the event by return null.
*
* This means the checkbox needs to have it's new value set before it goes to script
* to process the onclick and then if script cancels the event it needs to be set back.
* In Nav and IE there is a flash of it being set and then unset
*
* We have added this extra method to the checkbox to tell it to temporarily return the
* opposite value while processing the click event. This way script gets the correct "future"
* value of the checkbox, but there is no visual updating until after script is done processing.
* That way if the event is cancelled then the checkbox will not flash.
*
* So get the Frame for the checkbox and tell it we are processing an onclick event
* (see also: nsHTMLInputElement.cpp)
*/
NS_IMETHOD SetIsInClickEvent(PRBool aVal) = 0;
};
#endif