1 // Copyright 2013 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_MESSAGE_CENTER_VIEWS_PADDED_BUTTON_H_ 6 #define UI_MESSAGE_CENTER_VIEWS_PADDED_BUTTON_H_ 7 8 #include "base/basictypes.h" 9 #include "base/compiler_specific.h" 10 #include "ui/views/controls/button/image_button.h" 11 12 namespace message_center { 13 14 // PaddedButtons are ImageButtons whose image can be padded within the button. 15 // This allows the creation of buttons like the notification close and expand 16 // buttons whose clickable areas extends beyond their image areas 17 // (<http://crbug.com/168822>) without the need to create and maintain 18 // corresponding resource images with alpha padding. In the future, this class 19 // will also allow for buttons whose touch areas extend beyond their clickable 20 // area (<http://crbug.com/168856>). 21 class PaddedButton : public views::ImageButton { 22 public: 23 PaddedButton(views::ButtonListener* listener); 24 virtual ~PaddedButton(); 25 26 // Overridden from views::ImageButton: 27 virtual gfx::Size GetPreferredSize() OVERRIDE; 28 virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE; 29 virtual void OnFocus() OVERRIDE; 30 31 // The SetPadding() method also sets the button's image alignment (positive 32 // values yield left/top alignments, negative values yield right/bottom ones, 33 // and zero values center/middle ones). ImageButton::SetImageAlignment() calls 34 // will not affect PaddedButton image alignments. 35 void SetPadding(int horizontal_padding, int vertical_padding); 36 37 void SetNormalImage(int resource_id); 38 void SetHoveredImage(int resource_id); 39 void SetPressedImage(int resource_id); 40 41 protected: 42 gfx::Point ComputePaddedImagePaintPosition(const gfx::ImageSkia& image); 43 44 private: 45 gfx::Insets padding_; 46 47 DISALLOW_COPY_AND_ASSIGN(PaddedButton); 48 }; 49 50 } // namespace message_center 51 52 #endif // UI_MESSAGE_CENTER_VIEWS_PADDED_BUTTON_H_
