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706bdfa5fd
If only the mouse was being used for selection, then it needs to reset itself to the state before dropping down if arrow keys had been used then it needs to keep that selection The combobox chaches the current selection, so when arrow keys are used it has the correct selection when the mouse is used it holds the old selection. So therefore, we can compare against it to determine what to do. Bug 63247 r=waqar sr=hyatt
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) = 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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