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1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
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2 /* This Source Code Form is subject to the terms of the Mozilla Public |
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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5 |
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6 #ifndef nsIScrollbarOwner_h___ |
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7 #define nsIScrollbarOwner_h___ |
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8 |
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9 #include "nsQueryFrame.h" |
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10 |
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11 class nsIDOMEventTarget; |
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12 class nsIFrame; |
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13 |
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14 /** |
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15 * An interface that represents a frame which manages scrollbars. |
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16 */ |
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17 class nsIScrollbarOwner : public nsQueryFrame { |
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18 public: |
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19 NS_DECL_QUERYFRAME_TARGET(nsIScrollbarOwner) |
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20 |
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21 /** |
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22 * Obtain the frame for the horizontal or vertical scrollbar, or null |
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23 * if there is no such box. |
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24 */ |
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25 virtual nsIFrame* GetScrollbarBox(bool aVertical) = 0; |
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26 |
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27 /** |
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28 * Show or hide scrollbars on 2 fingers touch. |
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29 * Subclasses should call their ScrollbarActivity's corresponding methods. |
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30 */ |
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31 virtual void ScrollbarActivityStarted() const = 0; |
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32 virtual void ScrollbarActivityStopped() const = 0; |
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33 }; |
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34 |
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35 #endif |