| // Copyright 2013 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/chromeos/ui/focus_ring_layer.h" |
| |
| #include "ash/system/tray/actionable_view.h" |
| #include "ash/system/tray/tray_background_view.h" |
| #include "ash/system/tray/tray_popup_header_button.h" |
| #include "base/bind.h" |
| #include "ui/aura/window.h" |
| #include "ui/compositor/layer.h" |
| #include "ui/gfx/canvas.h" |
| #include "ui/views/controls/button/label_button.h" |
| #include "ui/views/view.h" |
| #include "ui/views/widget/widget.h" |
| |
| namespace chromeos { |
| |
| namespace { |
| |
| const int kShadowRadius = 10; |
| const int kShadowAlpha = 90; |
| const SkColor kShadowColor = SkColorSetRGB(77, 144, 254); |
| |
| } // namespace |
| |
| FocusRingLayer::FocusRingLayer() |
| : window_(NULL), |
| root_window_(NULL) { |
| } |
| |
| FocusRingLayer::~FocusRingLayer() {} |
| |
| void FocusRingLayer::Update() { |
| if (!window_) |
| return; |
| |
| aura::Window* root_window = window_->GetRootWindow(); |
| if (!layer_ || root_window != root_window_) { |
| root_window_ = root_window; |
| ui::Layer* root_layer = root_window->layer(); |
| layer_.reset(new ui::Layer(ui::LAYER_TEXTURED)); |
| layer_->set_name("FocusRing"); |
| layer_->set_delegate(this); |
| layer_->SetFillsBoundsOpaquely(false); |
| root_layer->Add(layer_.get()); |
| } |
| |
| // Keep moving it to the top in case new layers have been added |
| // since we created this layer. |
| layer_->parent()->StackAtTop(layer_.get()); |
| |
| // Translate native window coordinates to root window coordinates. |
| gfx::Point origin = focus_ring_.origin(); |
| aura::Window::ConvertPointToTarget(window_, root_window_, &origin); |
| gfx::Rect layer_bounds = focus_ring_; |
| layer_bounds.set_origin(origin); |
| int inset = -(kShadowRadius + 2); |
| layer_bounds.Inset(inset, inset, inset, inset); |
| layer_->SetBounds(layer_bounds); |
| } |
| |
| void FocusRingLayer::SetForView(views::View* view) { |
| if (!view) { |
| if (layer_ && !focus_ring_.IsEmpty()) |
| layer_->SchedulePaint(focus_ring_); |
| focus_ring_ = gfx::Rect(); |
| return; |
| } |
| |
| DCHECK(view->GetWidget()); |
| window_ = view->GetWidget()->GetNativeWindow(); |
| |
| gfx::Rect view_bounds = view->GetContentsBounds(); |
| |
| // Workarounds that attempts to pick a better bounds. |
| if (view->GetClassName() == views::LabelButton::kViewClassName) { |
| view_bounds = view->GetLocalBounds(); |
| view_bounds.Inset(2, 2, 2, 2); |
| } |
| |
| // Workarounds for system tray items that have customized focus borders. The |
| // insets here must be consistent with the ones used by those classes. |
| if (view->GetClassName() == ash::ActionableView::kViewClassName) { |
| view_bounds = view->GetLocalBounds(); |
| view_bounds.Inset(1, 1, 3, 3); |
| } else if (view->GetClassName() == ash::TrayBackgroundView::kViewClassName) { |
| view_bounds.Inset(1, 1, 3, 3); |
| } else if (view->GetClassName() == |
| ash::TrayPopupHeaderButton::kViewClassName) { |
| view_bounds = view->GetLocalBounds(); |
| view_bounds.Inset(2, 1, 2, 2); |
| } |
| |
| focus_ring_ = view->ConvertRectToWidget(view_bounds); |
| Update(); |
| } |
| |
| void FocusRingLayer::OnPaintLayer(gfx::Canvas* canvas) { |
| if (focus_ring_.IsEmpty()) |
| return; |
| |
| // Convert the focus ring from native-window-relative coordinates to |
| // layer-relative coordinates. |
| gfx::Point origin = focus_ring_.origin(); |
| aura::Window::ConvertPointToTarget(window_, root_window_, &origin); |
| origin -= layer_->bounds().OffsetFromOrigin(); |
| gfx::Rect bounds = focus_ring_; |
| bounds.set_origin(origin); |
| |
| SkPaint paint; |
| paint.setColor(kShadowColor); |
| paint.setFlags(SkPaint::kAntiAlias_Flag); |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(2); |
| int r = kShadowRadius; |
| for (int i = 0; i < r; i++) { |
| // Fade out alpha quadratically. |
| paint.setAlpha((kShadowAlpha * (r - i) * (r - i)) / (r * r)); |
| gfx::Rect outsetRect = bounds; |
| outsetRect.Inset(-i, -i, -i, -i); |
| canvas->DrawRect(outsetRect, paint); |
| } |
| } |
| |
| void FocusRingLayer::OnDeviceScaleFactorChanged(float device_scale_factor) { |
| Update(); |
| } |
| |
| base::Closure FocusRingLayer::PrepareForLayerBoundsChange() { |
| return base::Bind(&base::DoNothing); |
| } |
| |
| } // namespace chromeos |