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author | sky@chromium.org <sky@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-05-05 03:43:55 +0000 |
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committer | sky@chromium.org <sky@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-05-05 03:43:55 +0000 |
commit | 4ce7e15da651c6221720e33dc8c500830d4b6b8a (patch) | |
tree | 376ef1d7e7951dae3376e65f4edee9e7367adc89 /app/tween.h | |
parent | 5ee3ca64cdf2d00f82a1bc36f36e8ab5e520b4de (diff) | |
download | chromium_src-4ce7e15da651c6221720e33dc8c500830d4b6b8a.zip chromium_src-4ce7e15da651c6221720e33dc8c500830d4b6b8a.tar.gz chromium_src-4ce7e15da651c6221720e33dc8c500830d4b6b8a.tar.bz2 |
Refactors animation to allow for cleaner subclassing. I'm doing this
for creating a different animation subclass (which you'll see
shortly).
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/1961001
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@46433 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'app/tween.h')
-rw-r--r-- | app/tween.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/app/tween.h b/app/tween.h new file mode 100644 index 0000000..41785ef6 --- /dev/null +++ b/app/tween.h @@ -0,0 +1,43 @@ +// Copyright (c) 2010 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef APP_TWEEN_H_ +#define APP_TWEEN_H_ + +#include "base/logging.h" + +namespace gfx { +class Rect; +} + +class Tween { + public: + enum Type { + LINEAR, // Linear. + EASE_OUT, // Fast in, slow out (default). + EASE_IN, // Slow in, fast out. + EASE_IN_OUT, // Slow in and out, fast in the middle. + FAST_IN_OUT, // Fast in and out, slow in the middle. + EASE_OUT_SNAP, // Fast in, slow out, snap to final value. + ZERO, // Returns a value of 0 always. + }; + + // Returns the value based on the tween type. |state| is from 0-1. + static double CalculateValue(Type type, double state); + + // Conveniences for getting a value between a start and end point. + static double ValueBetween(double value, double start, double target); + static int ValueBetween(double value, int start, int target); + static gfx::Rect ValueBetween(double value, + const gfx::Rect& start_bounds, + const gfx::Rect& target_bounds); + + private: + Tween(); + ~Tween(); + + DISALLOW_COPY_AND_ASSIGN(Tween); +}; + +#endif // APP_TWEEN_H_ |