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Diffstat (limited to 'ui/wm/core/shadow.cc')
| -rw-r--r-- | ui/wm/core/shadow.cc | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/ui/wm/core/shadow.cc b/ui/wm/core/shadow.cc new file mode 100644 index 0000000..fb2d940 --- /dev/null +++ b/ui/wm/core/shadow.cc @@ -0,0 +1,195 @@ +// 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 "ui/wm/core/shadow.h" + +#include "grit/ui_resources.h" +#include "ui/base/resource/resource_bundle.h" +#include "ui/compositor/scoped_layer_animation_settings.h" +#include "ui/wm/core/image_grid.h" + +namespace { + +// Shadow opacity for different styles. +const float kActiveShadowOpacity = 1.0f; +const float kInactiveShadowOpacity = 0.2f; +const float kSmallShadowOpacity = 1.0f; + +// Interior inset for different styles. +const int kActiveInteriorInset = 0; +const int kInactiveInteriorInset = 0; +const int kSmallInteriorInset = 5; + +// Duration for opacity animation in milliseconds. +const int kShadowAnimationDurationMs = 100; + +float GetOpacityForStyle(views::corewm::Shadow::Style style) { + switch (style) { + case views::corewm::Shadow::STYLE_ACTIVE: + return kActiveShadowOpacity; + case views::corewm::Shadow::STYLE_INACTIVE: + return kInactiveShadowOpacity; + case views::corewm::Shadow::STYLE_SMALL: + return kSmallShadowOpacity; + } + return 1.0f; +} + +int GetInteriorInsetForStyle(views::corewm::Shadow::Style style) { + switch (style) { + case views::corewm::Shadow::STYLE_ACTIVE: + return kActiveInteriorInset; + case views::corewm::Shadow::STYLE_INACTIVE: + return kInactiveInteriorInset; + case views::corewm::Shadow::STYLE_SMALL: + return kSmallInteriorInset; + } + return 0; +} + +} // namespace + +namespace views { +namespace corewm { + +Shadow::Shadow() : style_(STYLE_ACTIVE), interior_inset_(0) { +} + +Shadow::~Shadow() { +} + +void Shadow::Init(Style style) { + style_ = style; + image_grid_.reset(new ImageGrid); + UpdateImagesForStyle(); + image_grid_->layer()->set_name("Shadow"); + image_grid_->layer()->SetOpacity(GetOpacityForStyle(style_)); +} + +void Shadow::SetContentBounds(const gfx::Rect& content_bounds) { + content_bounds_ = content_bounds; + UpdateImageGridBounds(); +} + +ui::Layer* Shadow::layer() const { + return image_grid_->layer(); +} + +void Shadow::SetStyle(Style style) { + if (style_ == style) + return; + + Style old_style = style_; + style_ = style; + + // Stop waiting for any as yet unfinished implicit animations. + StopObservingImplicitAnimations(); + + // If we're switching to or from the small style, don't bother with + // animations. + if (style == STYLE_SMALL || old_style == STYLE_SMALL) { + UpdateImagesForStyle(); + image_grid_->layer()->SetOpacity(GetOpacityForStyle(style)); + return; + } + + // If we're becoming active, switch images now. Because the inactive image + // has a very low opacity the switch isn't noticeable and this approach + // allows us to use only a single set of shadow images at a time. + if (style == STYLE_ACTIVE) { + UpdateImagesForStyle(); + // Opacity was baked into inactive image, start opacity low to match. + image_grid_->layer()->SetOpacity(kInactiveShadowOpacity); + } + + { + // Property sets within this scope will be implicitly animated. + ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator()); + settings.AddObserver(this); + settings.SetTransitionDuration( + base::TimeDelta::FromMilliseconds(kShadowAnimationDurationMs)); + switch (style_) { + case STYLE_ACTIVE: + image_grid_->layer()->SetOpacity(kActiveShadowOpacity); + break; + case STYLE_INACTIVE: + image_grid_->layer()->SetOpacity(kInactiveShadowOpacity); + break; + default: + NOTREACHED() << "Unhandled style " << style_; + break; + } + } +} + +void Shadow::OnImplicitAnimationsCompleted() { + // If we just finished going inactive, switch images. This doesn't cause + // a visual pop because the inactive image opacity is so low. + if (style_ == STYLE_INACTIVE) { + UpdateImagesForStyle(); + // Opacity is baked into inactive image, so set fully opaque. + image_grid_->layer()->SetOpacity(1.0f); + } +} + +void Shadow::UpdateImagesForStyle() { + ResourceBundle& res = ResourceBundle::GetSharedInstance(); + switch (style_) { + case STYLE_ACTIVE: + image_grid_->SetImages( + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_TOP_LEFT), + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_TOP), + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_TOP_RIGHT), + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_LEFT), + NULL, + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_RIGHT), + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_BOTTOM_LEFT), + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_BOTTOM), + &res.GetImageNamed(IDR_AURA_SHADOW_ACTIVE_BOTTOM_RIGHT)); + break; + case STYLE_INACTIVE: + image_grid_->SetImages( + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_TOP_LEFT), + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_TOP), + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_TOP_RIGHT), + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_LEFT), + NULL, + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_RIGHT), + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_BOTTOM_LEFT), + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_BOTTOM), + &res.GetImageNamed(IDR_AURA_SHADOW_INACTIVE_BOTTOM_RIGHT)); + break; + case STYLE_SMALL: + image_grid_->SetImages( + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_TOP_LEFT), + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_TOP), + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_TOP_RIGHT), + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_LEFT), + NULL, + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_RIGHT), + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_BOTTOM_LEFT), + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_BOTTOM), + &res.GetImageNamed(IDR_WINDOW_BUBBLE_SHADOW_SMALL_BOTTOM_RIGHT)); + break; + default: + NOTREACHED() << "Unhandled style " << style_; + break; + } + + // Update interior inset for style. + interior_inset_ = GetInteriorInsetForStyle(style_); + + // Image sizes may have changed. + UpdateImageGridBounds(); +} + +void Shadow::UpdateImageGridBounds() { + // Update bounds based on content bounds and image sizes. + gfx::Rect image_grid_bounds = content_bounds_; + image_grid_bounds.Inset(interior_inset_, interior_inset_); + image_grid_->SetContentBounds(image_grid_bounds); +} + +} // namespace corewm +} // namespace views |