| // Copyright (c) 2012 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. |
| |
| #include "chrome/browser/ui/panels/panel_bounds_animation.h" |
| |
| #include "chrome/browser/ui/panels/panel.h" |
| #include "chrome/browser/ui/panels/panel_manager.h" |
| |
| namespace { |
| |
| // These values are experimental and subjective. |
| const int kDefaultFramerateHz = 50; |
| const int kSetBoundsAnimationMs = 180; |
| const int kSetBoundsAnimationBigMinimizeMs = 1500; |
| |
| } |
| |
| PanelBoundsAnimation::PanelBoundsAnimation(gfx::AnimationDelegate* target, |
| Panel* panel, |
| const gfx::Rect& initial_bounds, |
| const gfx::Rect& final_bounds) |
| : gfx::LinearAnimation(kDefaultFramerateHz, target), |
| panel_(panel), |
| for_big_minimize_(false), |
| animation_stop_to_show_titlebar_(0) { |
| // Detect animation that happens when expansion state is set to MINIMIZED |
| // and there is relatively big portion of the panel to hide from view. |
| // Initialize animation differently in this case, using fast-pause-slow |
| // method, see below for more details. |
| int duration = kSetBoundsAnimationMs; |
| if (initial_bounds.height() > final_bounds.height() && |
| panel_->expansion_state() == Panel::MINIMIZED) { |
| double hidden_title_height = |
| panel_->TitleOnlyHeight() - final_bounds.height(); |
| double distance_y = initial_bounds.height() - final_bounds.height(); |
| animation_stop_to_show_titlebar_ = 1.0 - hidden_title_height / distance_y; |
| if (animation_stop_to_show_titlebar_ > 0.7) { // Relatively big movement. |
| for_big_minimize_ = true; |
| duration = kSetBoundsAnimationBigMinimizeMs; |
| } |
| } |
| SetDuration(PanelManager::AdjustTimeInterval(duration)); |
| } |
| |
| PanelBoundsAnimation::~PanelBoundsAnimation() { |
| } |
| |
| double PanelBoundsAnimation::GetCurrentValue() const { |
| return ComputeAnimationValue(gfx::LinearAnimation::GetCurrentValue(), |
| for_big_minimize_, |
| animation_stop_to_show_titlebar_); |
| } |
| |
| double PanelBoundsAnimation::ComputeAnimationValue(double progress, |
| bool for_big_minimize, double animation_stop_to_show_titlebar) { |
| if (!for_big_minimize) { |
| // Cubic easing out. |
| double value = 1.0 - progress; |
| return 1.0 - value * value * value; |
| } |
| |
| // Minimize animation is done in 3 steps: |
| // 1. Quickly (0 -> 0.15) make only titlebar visible. |
| // 2. Freeze for a little bit (0.15->0.6), just showing titlebar. |
| // 3. Slowly minimize to thin strip (0.6->1.0) |
| const double kProgressAtFreezeStart = 0.15; |
| const double kProgressAtFreezeEnd = 0.6; |
| double value; |
| if (progress <= kProgressAtFreezeStart) { |
| value = animation_stop_to_show_titlebar * |
| (progress / kProgressAtFreezeStart); |
| } else if (progress <= kProgressAtFreezeEnd) { |
| value = animation_stop_to_show_titlebar; |
| } else { |
| value = animation_stop_to_show_titlebar + |
| (1.0 - animation_stop_to_show_titlebar) * |
| ((progress - kProgressAtFreezeEnd) / (1.0 - kProgressAtFreezeEnd)); |
| } |
| return value; |
| } |