1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_ 6 #define UI_VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_ 7 8 namespace views { 9 10 // An interface implemented by objects that want to be notified about the resize 11 // event. 12 class ResizeAreaDelegate { 13 public: 14 // OnResize is sent when resizing is detected. |resize_amount| specifies the 15 // number of pixels that the user wants to resize by, and can be negative or 16 // positive (depending on direction of dragging and flips according to 17 // locale directionality: dragging to the left in LTR locales gives negative 18 // |resize_amount| but positive amount for RTL). |done_resizing| is true if 19 // the user has released the mouse. 20 virtual void OnResize(int resize_amount, bool done_resizing) = 0; 21 22 protected: 23 virtual ~ResizeAreaDelegate() {} 24 }; 25 26 } // namespace views 27 28 #endif // UI_VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_ 29
