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 ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_H_ 6 #define ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_H_ 7 8 #include "ash/ash_export.h" 9 #include "ash/frame/caption_buttons/caption_button_types.h" 10 #include "base/memory/scoped_ptr.h" 11 #include "ui/gfx/image/image_skia.h" 12 #include "ui/views/controls/button/custom_button.h" 13 14 namespace gfx { 15 class SlideAnimation; 16 } 17 18 namespace ash { 19 20 // Base class for the window caption buttons (minimize, maximize, restore, 21 // close). 22 class ASH_EXPORT FrameCaptionButton : public views::CustomButton { 23 public: 24 enum Animate { 25 ANIMATE_YES, 26 ANIMATE_NO 27 }; 28 29 static const char kViewClassName[]; 30 31 FrameCaptionButton(views::ButtonListener* listener, CaptionButtonIcon icon); 32 virtual ~FrameCaptionButton(); 33 34 // Sets the images to use to paint the button. If |animate| is ANIMATE_YES, 35 // the button crossfades to the new visuals. If the image ids match those 36 // currently used by the button and |animate| is ANIMATE_NO the crossfade 37 // animation is progressed to the end. 38 void SetImages(CaptionButtonIcon icon, 39 Animate animate, 40 int icon_image_id, 41 int inactive_icon_image_id, 42 int hovered_background_image_id, 43 int pressed_background_image_id); 44 45 // Returns true if the button is crossfading to new visuals set in 46 // SetImages(). 47 bool IsAnimatingImageSwap() const; 48 49 // Sets the alpha to use for painting. Used to animate visibility changes. 50 void SetAlpha(int alpha); 51 52 // views::View overrides: 53 virtual gfx::Size GetPreferredSize() const OVERRIDE; 54 virtual const char* GetClassName() const OVERRIDE; 55 virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE; 56 set_paint_as_active(bool paint_as_active)57 void set_paint_as_active(bool paint_as_active) { 58 paint_as_active_ = paint_as_active; 59 } 60 icon()61 CaptionButtonIcon icon() const { 62 return icon_; 63 } 64 65 protected: 66 // views::CustomButton override: 67 virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE; 68 69 private: 70 // Returns the icon image to paint based on |paint_as_active_|. 71 const gfx::ImageSkia& GetIconImageToPaint() const; 72 73 // Paints |to_center| centered within the button with |alpha|. 74 void PaintCentered(gfx::Canvas* canvas, 75 const gfx::ImageSkia& to_center, 76 int alpha); 77 78 // The button's current icon. 79 CaptionButtonIcon icon_; 80 81 // Whether the button should be painted as active. 82 bool paint_as_active_; 83 84 // Current alpha to use for painting. 85 int alpha_; 86 87 // The images and image ids used to paint the button. 88 int icon_image_id_; 89 int inactive_icon_image_id_; 90 int hovered_background_image_id_; 91 int pressed_background_image_id_; 92 gfx::ImageSkia icon_image_; 93 gfx::ImageSkia inactive_icon_image_; 94 gfx::ImageSkia hovered_background_image_; 95 gfx::ImageSkia pressed_background_image_; 96 97 // The icon image to crossfade from. 98 gfx::ImageSkia crossfade_icon_image_; 99 100 // Crossfade animation started when the button's images are changed by 101 // SetImages(). 102 scoped_ptr<gfx::SlideAnimation> swap_images_animation_; 103 104 DISALLOW_COPY_AND_ASSIGN(FrameCaptionButton); 105 }; 106 107 } // namespace ash 108 109 #endif // ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_H_ 110