зеркало из https://github.com/mozilla/gecko-dev.git
89 строки
2.7 KiB
C++
89 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef nsIComboboxControlFrame_h___
|
|
#define nsIComboboxControlFrame_h___
|
|
|
|
#include "nsQueryFrame.h"
|
|
#include "nsFont.h"
|
|
|
|
class nsString;
|
|
class nsIContent;
|
|
class nsCSSFrameConstructor;
|
|
|
|
/**
|
|
* nsIComboboxControlFrame is the common interface for frames of form controls. It
|
|
* provides a uniform way of creating widgets, resizing, and painting.
|
|
* @see nsLeafFrame and its base classes for more info
|
|
*/
|
|
class nsIComboboxControlFrame : public nsQueryFrame
|
|
{
|
|
public:
|
|
NS_DECL_QUERYFRAME_TARGET(nsIComboboxControlFrame)
|
|
|
|
/**
|
|
* Indicates whether the list is dropped down
|
|
*/
|
|
virtual bool IsDroppedDown() = 0;
|
|
|
|
/**
|
|
* Shows or hides the drop down
|
|
*/
|
|
virtual void ShowDropDown(bool aDoDropDown) = 0;
|
|
|
|
/**
|
|
* Gets the Drop Down List
|
|
*/
|
|
virtual nsIFrame* GetDropDown() = 0;
|
|
|
|
/**
|
|
* Sets the Drop Down List
|
|
*/
|
|
virtual void SetDropDown(nsIFrame* aDropDownFrame) = 0;
|
|
|
|
/**
|
|
* Tells the combobox to roll up
|
|
*/
|
|
virtual void RollupFromList() = 0;
|
|
|
|
/**
|
|
* Redisplay the selected text (will do nothing if text has not changed).
|
|
* This method might destroy this frame or any others that happen to be
|
|
* around. It might even run script.
|
|
*/
|
|
NS_IMETHOD RedisplaySelectedText() = 0;
|
|
|
|
/**
|
|
* Method for the listbox to set and get the recent index
|
|
*/
|
|
virtual int32_t UpdateRecentIndex(int32_t aIndex) = 0;
|
|
|
|
/**
|
|
* Notification that the content has been reset
|
|
*/
|
|
virtual void OnContentReset() = 0;
|
|
|
|
/**
|
|
* This returns the index of the item that is currently being displayed
|
|
* in the display area. It may differ from what the currently Selected index
|
|
* is in in the dropdown.
|
|
*
|
|
* Detailed explanation:
|
|
* When the dropdown is dropped down via a mouse click and the user moves the mouse
|
|
* up and down without clicking, the currently selected item is being tracking inside
|
|
* the dropdown, but the combobox is not being updated. When the user selects items
|
|
* with the arrow keys, the combobox is being updated. So when the user clicks outside
|
|
* the dropdown and it needs to roll up it has to decide whether to keep the current
|
|
* selection or not. This method is used to get the current index in the combobox to
|
|
* compare it to the current index in the dropdown to see if the combox has been updated
|
|
* and that way it knows whether to "cancel" the current selection residing in the
|
|
* dropdown. Or whether to leave the selection alone.
|
|
*/
|
|
virtual int32_t GetIndexOfDisplayArea() = 0;
|
|
};
|
|
|
|
#endif
|
|
|