зеркало из https://github.com/mozilla/gecko-dev.git
95 строки
2.2 KiB
C++
95 строки
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsIListControlFrame_h___
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#define nsIListControlFrame_h___
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#include "nsQueryFrame.h"
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#include "nsFont.h"
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class nsAString;
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class nsIContent;
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/**
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* nsIListControlFrame is the interface for frame-based listboxes.
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*/
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class nsIListControlFrame : public nsQueryFrame
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{
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public:
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NS_DECL_QUERYFRAME_TARGET(nsIListControlFrame)
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/**
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* Sets the ComboBoxFrame
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*
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*/
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virtual void SetComboboxFrame(nsIFrame* aComboboxFrame) = 0;
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/**
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* Get the display string for an item
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*/
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virtual void GetOptionText(int32_t aIndex, nsAString & aStr) = 0;
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/**
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* Get the Selected Item's index
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*
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*/
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virtual int32_t GetSelectedIndex() = 0;
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/**
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* Return current option. The current option is the option displaying
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* the focus ring when the listbox is focused.
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*/
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virtual already_AddRefed<nsIContent> GetCurrentOption() = 0;
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/**
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* Initiates mouse capture for the listbox
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*
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*/
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virtual void CaptureMouseEvents(bool aGrabMouseEvents) = 0;
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/**
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* Returns the height of a single row in the list. This is the
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* maximum of the heights of all the options/optgroups.
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*/
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virtual nscoord GetHeightOfARow() = 0;
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/**
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* Returns the number of options in the listbox
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*/
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virtual uint32_t GetNumberOfOptions() = 0;
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/**
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* Called by combobox when it's about to drop down
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*/
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virtual void AboutToDropDown() = 0;
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/**
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* Called by combobox when it's about to roll up
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*/
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virtual void AboutToRollup() = 0;
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/**
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* Fire on change (used by combobox)
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*/
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virtual void FireOnChange() = 0;
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/**
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* Tell the selected list to roll up and ensure that the proper index is
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* selected, possibly firing onChange if the index has changed
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*
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* @param aIndex the index to actually select
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*/
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virtual void ComboboxFinish(int32_t aIndex) = 0;
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/**
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* Notification that the content has been reset
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*/
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virtual void OnContentReset() = 0;
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};
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#endif
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