15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved.
25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be
35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file.
45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef UI_VIEWS_NATIVE_THEME_DELEGATE_H_
65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define UI_VIEWS_NATIVE_THEME_DELEGATE_H_
75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/rect.h"
92a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "ui/native_theme/native_theme.h"
105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/views/views_export.h"
115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace views {
135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A delagate that supports animating transtions between different native
155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// theme states.  This delegate can be used to control a native theme Border
165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// or Painter object.
175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//
185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// If animation is ongoing, the native theme border or painter will
195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// composite the foreground state over the backgroud state using an alpha
205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// between 0 and 255 based on the current value of the animation.
215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class VIEWS_EXPORT NativeThemeDelegate {
225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public:
235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  virtual ~NativeThemeDelegate() {}
245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // Get the native theme part that should be drawn.
265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  virtual ui::NativeTheme::Part GetThemePart() const = 0;
275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // Get the rectangle that should be painted.
295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  virtual gfx::Rect GetThemePaintRect() const = 0;
305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // Get the state of the part, along with any extra data needed for drawing.
325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  virtual ui::NativeTheme::State GetThemeState(
335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)      ui::NativeTheme::ExtraParams* params) const = 0;
345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // If the native theme drawign should be animated, return the Animation object
365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // that controlls it.  If no animation is ongoing, NULL may be returned.
375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  virtual const ui::Animation* GetThemeAnimation() const = 0;
385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // If animation is onging, this returns the background native theme state.
405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  virtual ui::NativeTheme::State GetBackgroundThemeState(
415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)      ui::NativeTheme::ExtraParams* params) const = 0;
425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // If animation is onging, this returns the foreground native theme state.
445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // This state will be composited over the background using an alpha value
455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  // based on the current value of the animation.
465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)  virtual ui::NativeTheme::State GetForegroundThemeState(
475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)      ui::NativeTheme::ExtraParams* params) const = 0;
485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)};
495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}  // namespace views
515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif  // UI_VIEWS_NATIVE_THEME_DELEGATE_H_
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