| // 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/views/dropdown_bar_host.h" |
| |
| #include <algorithm> |
| |
| #include "chrome/browser/ui/view_ids.h" |
| #include "chrome/browser/ui/views/dropdown_bar_host_delegate.h" |
| #include "chrome/browser/ui/views/dropdown_bar_view.h" |
| #include "chrome/browser/ui/views/frame/browser_view.h" |
| #include "ui/events/keycodes/keyboard_codes.h" |
| #include "ui/gfx/animation/slide_animation.h" |
| #include "ui/gfx/scrollbar_size.h" |
| #include "ui/views/focus/external_focus_tracker.h" |
| #include "ui/views/focus/view_storage.h" |
| #include "ui/views/widget/widget.h" |
| |
| // static |
| bool DropdownBarHost::disable_animations_during_testing_ = false; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // DropdownBarHost, public: |
| |
| DropdownBarHost::DropdownBarHost(BrowserView* browser_view) |
| : browser_view_(browser_view), |
| view_(NULL), |
| delegate_(NULL), |
| animation_offset_(0), |
| focus_manager_(NULL), |
| esc_accel_target_registered_(false), |
| is_visible_(false) { |
| } |
| |
| void DropdownBarHost::Init(views::View* host_view, |
| views::View* view, |
| DropdownBarHostDelegate* delegate) { |
| DCHECK(view); |
| DCHECK(delegate); |
| |
| view_ = view; |
| delegate_ = delegate; |
| |
| // Initialize the host. |
| host_.reset(new views::Widget); |
| views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL); |
| params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET; |
| params.parent = browser_view_->GetWidget()->GetNativeView(); |
| params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW; |
| host_->Init(params); |
| host_->SetContentsView(view_); |
| |
| SetHostViewNative(host_view); |
| |
| // Start listening to focus changes, so we can register and unregister our |
| // own handler for Escape. |
| focus_manager_ = host_->GetFocusManager(); |
| if (focus_manager_) { |
| focus_manager_->AddFocusChangeListener(this); |
| } else { |
| // In some cases (see bug http://crbug.com/17056) it seems we may not have |
| // a focus manager. Please reopen the bug if you hit this. |
| NOTREACHED(); |
| } |
| |
| // Start the process of animating the opening of the widget. |
| animation_.reset(new gfx::SlideAnimation(this)); |
| } |
| |
| DropdownBarHost::~DropdownBarHost() { |
| focus_manager_->RemoveFocusChangeListener(this); |
| focus_tracker_.reset(NULL); |
| } |
| |
| void DropdownBarHost::Show(bool animate) { |
| // Stores the currently focused view, and tracks focus changes so that we can |
| // restore focus when the dropdown widget is closed. |
| focus_tracker_.reset(new views::ExternalFocusTracker(view_, focus_manager_)); |
| |
| bool was_visible = is_visible_; |
| is_visible_ = true; |
| if (!animate || disable_animations_during_testing_) { |
| animation_->Reset(1); |
| AnimationProgressed(animation_.get()); |
| } else if (!was_visible) { |
| // Don't re-start the animation. |
| animation_->Reset(); |
| animation_->Show(); |
| } |
| |
| if (!was_visible) |
| OnVisibilityChanged(); |
| } |
| |
| void DropdownBarHost::SetFocusAndSelection() { |
| delegate_->SetFocusAndSelection(true); |
| } |
| |
| bool DropdownBarHost::IsAnimating() const { |
| return animation_->is_animating(); |
| } |
| |
| void DropdownBarHost::Hide(bool animate) { |
| if (!IsVisible()) |
| return; |
| if (animate && !disable_animations_during_testing_ && |
| !animation_->IsClosing()) { |
| animation_->Hide(); |
| } else { |
| if (animation_->IsClosing()) { |
| // If we're in the middle of a close animation, skip immediately to the |
| // end of the animation. |
| StopAnimation(); |
| } else { |
| // Otherwise we need to set both the animation state to ended and the |
| // DropdownBarHost state to ended/hidden, otherwise the next time we try |
| // to show the bar, it might refuse to do so. Note that we call |
| // AnimationEnded ourselves as Reset does not call it if we are not |
| // animating here. |
| animation_->Reset(); |
| AnimationEnded(animation_.get()); |
| } |
| } |
| } |
| |
| void DropdownBarHost::StopAnimation() { |
| animation_->End(); |
| } |
| |
| bool DropdownBarHost::IsVisible() const { |
| return is_visible_; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // DropdownBarHost, views::FocusChangeListener implementation: |
| void DropdownBarHost::OnWillChangeFocus(views::View* focused_before, |
| views::View* focused_now) { |
| // First we need to determine if one or both of the views passed in are child |
| // views of our view. |
| bool our_view_before = focused_before && view_->Contains(focused_before); |
| bool our_view_now = focused_now && view_->Contains(focused_now); |
| |
| // When both our_view_before and our_view_now are false, it means focus is |
| // changing hands elsewhere in the application (and we shouldn't do anything). |
| // Similarly, when both are true, focus is changing hands within the dropdown |
| // widget (and again, we should not do anything). We therefore only need to |
| // look at when we gain initial focus and when we loose it. |
| if (!our_view_before && our_view_now) { |
| // We are gaining focus from outside the dropdown widget so we must register |
| // a handler for Escape. |
| RegisterAccelerators(); |
| } else if (our_view_before && !our_view_now) { |
| // We are losing focus to something outside our widget so we restore the |
| // original handler for Escape. |
| UnregisterAccelerators(); |
| } |
| } |
| |
| void DropdownBarHost::OnDidChangeFocus(views::View* focused_before, |
| views::View* focused_now) { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // DropdownBarHost, gfx::AnimationDelegate implementation: |
| |
| void DropdownBarHost::AnimationProgressed(const gfx::Animation* animation) { |
| // First, we calculate how many pixels to slide the widget. |
| gfx::Size pref_size = view_->GetPreferredSize(); |
| animation_offset_ = static_cast<int>((1.0 - animation_->GetCurrentValue()) * |
| pref_size.height()); |
| |
| // This call makes sure it appears in the right location, the size and shape |
| // is correct and that it slides in the right direction. |
| gfx::Rect dlg_rect = GetDialogPosition(gfx::Rect()); |
| SetDialogPosition(dlg_rect, false); |
| |
| // Let the view know if we are animating, and at which offset to draw the |
| // edges. |
| delegate_->SetAnimationOffset(animation_offset_); |
| view_->SchedulePaint(); |
| } |
| |
| void DropdownBarHost::AnimationEnded(const gfx::Animation* animation) { |
| // Place the dropdown widget in its fully opened state. |
| animation_offset_ = 0; |
| |
| if (!animation_->IsShowing()) { |
| // Animation has finished closing. |
| host_->Hide(); |
| is_visible_ = false; |
| OnVisibilityChanged(); |
| } else { |
| // Animation has finished opening. |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // DropdownBarHost protected: |
| |
| void DropdownBarHost::ResetFocusTracker() { |
| focus_tracker_.reset(NULL); |
| } |
| |
| void DropdownBarHost::OnVisibilityChanged() { |
| } |
| |
| void DropdownBarHost::GetWidgetBounds(gfx::Rect* bounds) { |
| DCHECK(bounds); |
| *bounds = browser_view_->bounds(); |
| } |
| |
| void DropdownBarHost::RegisterAccelerators() { |
| DCHECK(!esc_accel_target_registered_); |
| ui::Accelerator escape(ui::VKEY_ESCAPE, ui::EF_NONE); |
| focus_manager_->RegisterAccelerator( |
| escape, ui::AcceleratorManager::kNormalPriority, this); |
| esc_accel_target_registered_ = true; |
| } |
| |
| void DropdownBarHost::UnregisterAccelerators() { |
| DCHECK(esc_accel_target_registered_); |
| ui::Accelerator escape(ui::VKEY_ESCAPE, ui::EF_NONE); |
| focus_manager_->UnregisterAccelerator(escape, this); |
| esc_accel_target_registered_ = false; |
| } |