diff options
Diffstat (limited to 'chromium/ash/wm/panels/panel_layout_manager.cc')
| -rw-r--r-- | chromium/ash/wm/panels/panel_layout_manager.cc | 895 |
1 files changed, 895 insertions, 0 deletions
diff --git a/chromium/ash/wm/panels/panel_layout_manager.cc b/chromium/ash/wm/panels/panel_layout_manager.cc new file mode 100644 index 00000000000..ec7027b6129 --- /dev/null +++ b/chromium/ash/wm/panels/panel_layout_manager.cc @@ -0,0 +1,895 @@ +// 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 "ash/wm/panels/panel_layout_manager.h" + +#include <algorithm> +#include <map> + +#include "ash/launcher/launcher.h" +#include "ash/screen_ash.h" +#include "ash/shelf/shelf_layout_manager.h" +#include "ash/shelf/shelf_types.h" +#include "ash/shelf/shelf_widget.h" +#include "ash/shell.h" +#include "ash/shell_window_ids.h" +#include "ash/wm/window_animations.h" +#include "ash/wm/window_state.h" +#include "ash/wm/window_util.h" +#include "base/auto_reset.h" +#include "base/bind.h" +#include "base/bind_helpers.h" +#include "third_party/skia/include/core/SkColor.h" +#include "third_party/skia/include/core/SkPaint.h" +#include "third_party/skia/include/core/SkPath.h" +#include "ui/aura/client/activation_client.h" +#include "ui/aura/client/focus_client.h" +#include "ui/aura/client/window_tree_client.h" +#include "ui/aura/root_window.h" +#include "ui/aura/window.h" +#include "ui/aura/window_tracker.h" +#include "ui/compositor/scoped_layer_animation_settings.h" +#include "ui/gfx/canvas.h" +#include "ui/gfx/rect.h" +#include "ui/gfx/vector2d.h" +#include "ui/views/background.h" +#include "ui/views/widget/widget.h" + +namespace ash { +namespace internal { + +namespace { +const int kPanelIdealSpacing = 4; + +const float kMaxHeightFactor = .80f; +const float kMaxWidthFactor = .50f; + +// Duration for panel animations. +const int kPanelSlideDurationMilliseconds = 50; +const int kCalloutFadeDurationMilliseconds = 50; + +// Offset used when sliding panel in/out of the launcher. Used for minimizing, +// restoring and the initial showing of a panel. +const int kPanelSlideInOffset = 20; + +// Callout arrow dimensions. +const int kArrowWidth = 18; +const int kArrowHeight = 9; + +class CalloutWidgetBackground : public views::Background { + public: + CalloutWidgetBackground() : alignment_(SHELF_ALIGNMENT_BOTTOM) { + } + + virtual void Paint(gfx::Canvas* canvas, views::View* view) const OVERRIDE { + SkPath path; + switch (alignment_) { + case SHELF_ALIGNMENT_BOTTOM: + path.moveTo(SkIntToScalar(0), SkIntToScalar(0)); + path.lineTo(SkIntToScalar(kArrowWidth / 2), + SkIntToScalar(kArrowHeight)); + path.lineTo(SkIntToScalar(kArrowWidth), SkIntToScalar(0)); + break; + case SHELF_ALIGNMENT_LEFT: + path.moveTo(SkIntToScalar(kArrowHeight), SkIntToScalar(kArrowWidth)); + path.lineTo(SkIntToScalar(0), SkIntToScalar(kArrowWidth / 2)); + path.lineTo(SkIntToScalar(kArrowHeight), SkIntToScalar(0)); + break; + case SHELF_ALIGNMENT_TOP: + path.moveTo(SkIntToScalar(0), SkIntToScalar(kArrowHeight)); + path.lineTo(SkIntToScalar(kArrowWidth / 2), SkIntToScalar(0)); + path.lineTo(SkIntToScalar(kArrowWidth), SkIntToScalar(kArrowHeight)); + break; + case SHELF_ALIGNMENT_RIGHT: + path.moveTo(SkIntToScalar(0), SkIntToScalar(0)); + path.lineTo(SkIntToScalar(kArrowHeight), + SkIntToScalar(kArrowWidth / 2)); + path.lineTo(SkIntToScalar(0), SkIntToScalar(kArrowWidth)); + break; + } + // Hard code the arrow color for now. + SkPaint paint; + paint.setStyle(SkPaint::kFill_Style); + paint.setColor(SkColorSetARGB(0xff, 0xe5, 0xe5, 0xe5)); + canvas->DrawPath(path, paint); + } + + ShelfAlignment alignment() { + return alignment_; + } + + void set_alignment(ShelfAlignment alignment) { + alignment_ = alignment; + } + + private: + ShelfAlignment alignment_; + + DISALLOW_COPY_AND_ASSIGN(CalloutWidgetBackground); +}; + +struct VisiblePanelPositionInfo { + VisiblePanelPositionInfo() + : min_major(0), + max_major(0), + major_pos(0), + major_length(0), + window(NULL), + slide_in(false) {} + + int min_major; + int max_major; + int major_pos; + int major_length; + aura::Window* window; + bool slide_in; +}; + +bool CompareWindowMajor(const VisiblePanelPositionInfo& win1, + const VisiblePanelPositionInfo& win2) { + return win1.major_pos < win2.major_pos; +} + +void FanOutPanels(std::vector<VisiblePanelPositionInfo>::iterator first, + std::vector<VisiblePanelPositionInfo>::iterator last) { + int num_panels = last - first; + if (num_panels == 1) { + (*first).major_pos = std::max((*first).min_major, std::min( + (*first).max_major, (*first).major_pos)); + } + if (num_panels <= 1) + return; + + if (num_panels == 2) { + // If there are two adjacent overlapping windows, separate them by the + // minimum major_length necessary. + std::vector<VisiblePanelPositionInfo>::iterator second = first + 1; + int separation = (*first).major_length / 2 + (*second).major_length / 2 + + kPanelIdealSpacing; + int overlap = (*first).major_pos + separation - (*second).major_pos; + (*first).major_pos = std::max((*first).min_major, + (*first).major_pos - overlap / 2); + (*second).major_pos = std::min((*second).max_major, + (*first).major_pos + separation); + // Recalculate the first panel position in case the second one was + // constrained on the right. + (*first).major_pos = std::max((*first).min_major, + (*second).major_pos - separation); + return; + } + + // If there are more than two overlapping windows, fan them out from minimum + // position to maximum position equally spaced. + int delta = ((*(last - 1)).max_major - (*first).min_major) / (num_panels - 1); + int major_pos = (*first).min_major; + for (std::vector<VisiblePanelPositionInfo>::iterator iter = first; + iter != last; ++iter) { + (*iter).major_pos = std::max((*iter).min_major, + std::min((*iter).max_major, major_pos)); + major_pos += delta; + } +} + +bool BoundsAdjacent(const gfx::Rect& bounds1, const gfx::Rect& bounds2) { + return bounds1.x() == bounds2.right() || + bounds1.y() == bounds2.bottom() || + bounds1.right() == bounds2.x() || + bounds1.bottom() == bounds2.y(); +} + +gfx::Vector2d GetSlideInAnimationOffset(ShelfAlignment alignment) { + gfx::Vector2d offset; + switch (alignment) { + case SHELF_ALIGNMENT_BOTTOM: + offset.set_y(kPanelSlideInOffset); + break; + case SHELF_ALIGNMENT_LEFT: + offset.set_x(-kPanelSlideInOffset); + break; + case SHELF_ALIGNMENT_RIGHT: + offset.set_x(kPanelSlideInOffset); + break; + case SHELF_ALIGNMENT_TOP: + offset.set_y(-kPanelSlideInOffset); + break; + } + return offset; +} + +} // namespace + +class PanelCalloutWidget : public views::Widget { + public: + explicit PanelCalloutWidget(aura::Window* container) + : background_(NULL) { + InitWidget(container); + } + + void SetAlignment(ShelfAlignment alignment) { + gfx::Rect callout_bounds = GetWindowBoundsInScreen(); + if (alignment == SHELF_ALIGNMENT_BOTTOM || + alignment == SHELF_ALIGNMENT_TOP) { + callout_bounds.set_width(kArrowWidth); + callout_bounds.set_height(kArrowHeight); + } else { + callout_bounds.set_width(kArrowHeight); + callout_bounds.set_height(kArrowWidth); + } + GetNativeWindow()->SetBounds(callout_bounds); + if (background_->alignment() != alignment) { + background_->set_alignment(alignment); + SchedulePaintInRect(gfx::Rect(gfx::Point(), callout_bounds.size())); + } + } + + private: + void InitWidget(aura::Window* parent) { + views::Widget::InitParams params; + params.type = views::Widget::InitParams::TYPE_POPUP; + params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW; + params.can_activate = false; + params.keep_on_top = true; + params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET; + params.parent = parent; + params.bounds = ScreenAsh::ConvertRectToScreen(parent, gfx::Rect()); + params.bounds.set_width(kArrowWidth); + params.bounds.set_height(kArrowHeight); + // Why do we need this and can_activate = false? + set_focus_on_creation(false); + Init(params); + DCHECK_EQ(GetNativeView()->GetRootWindow(), parent->GetRootWindow()); + views::View* content_view = new views::View; + background_ = new CalloutWidgetBackground; + content_view->set_background(background_); + SetContentsView(content_view); + GetNativeWindow()->layer()->SetOpacity(0); + } + + // Weak pointer owned by this widget's content view. + CalloutWidgetBackground* background_; + + DISALLOW_COPY_AND_ASSIGN(PanelCalloutWidget); +}; + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager public implementation: +PanelLayoutManager::PanelLayoutManager(aura::Window* panel_container) + : panel_container_(panel_container), + in_add_window_(false), + in_layout_(false), + dragged_panel_(NULL), + launcher_(NULL), + shelf_layout_manager_(NULL), + last_active_panel_(NULL), + weak_factory_(this) { + DCHECK(panel_container); + aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())-> + AddObserver(this); + Shell::GetInstance()->display_controller()->AddObserver(this); + Shell::GetInstance()->AddShellObserver(this); +} + +PanelLayoutManager::~PanelLayoutManager() { + Shutdown(); +} + +void PanelLayoutManager::Shutdown() { + if (shelf_layout_manager_) + shelf_layout_manager_->RemoveObserver(this); + shelf_layout_manager_ = NULL; + for (PanelList::iterator iter = panel_windows_.begin(); + iter != panel_windows_.end(); ++iter) { + delete iter->callout_widget; + } + panel_windows_.clear(); + if (launcher_) + launcher_->RemoveIconObserver(this); + launcher_ = NULL; + aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())-> + RemoveObserver(this); + Shell::GetInstance()->display_controller()->RemoveObserver(this); + Shell::GetInstance()->RemoveShellObserver(this); +} + +void PanelLayoutManager::StartDragging(aura::Window* panel) { + DCHECK(!dragged_panel_); + dragged_panel_ = panel; + Relayout(); +} + +void PanelLayoutManager::FinishDragging() { + dragged_panel_ = NULL; + Relayout(); +} + +void PanelLayoutManager::SetLauncher(ash::Launcher* launcher) { + DCHECK(!launcher_); + DCHECK(!shelf_layout_manager_); + launcher_ = launcher; + launcher_->AddIconObserver(this); + if (launcher_->shelf_widget()) { + shelf_layout_manager_ = ash::internal::ShelfLayoutManager::ForLauncher( + launcher_->shelf_widget()->GetNativeWindow()); + WillChangeVisibilityState(shelf_layout_manager_->visibility_state()); + shelf_layout_manager_->AddObserver(this); + } +} + +void PanelLayoutManager::ToggleMinimize(aura::Window* panel) { + DCHECK(panel->parent() == panel_container_); + wm::WindowState* window_state = wm::GetWindowState(panel); + if (window_state->IsMinimized()) + window_state->Restore(); + else + window_state->Minimize(); +} + +views::Widget* PanelLayoutManager::GetCalloutWidgetForPanel( + aura::Window* panel) { + DCHECK(panel->parent() == panel_container_); + PanelList::iterator found = + std::find(panel_windows_.begin(), panel_windows_.end(), panel); + DCHECK(found != panel_windows_.end()); + return found->callout_widget; +} + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager, aura::LayoutManager implementation: +void PanelLayoutManager::OnWindowResized() { + Relayout(); +} + +void PanelLayoutManager::OnWindowAddedToLayout(aura::Window* child) { + if (child->type() == aura::client::WINDOW_TYPE_POPUP) + return; + if (in_add_window_) + return; + base::AutoReset<bool> auto_reset_in_add_window(&in_add_window_, true); + if (!wm::GetWindowState(child)->panel_attached()) { + // This should only happen when a window is added to panel container as a + // result of bounds change from within the application during a drag. + // If so we have already stopped the drag and should reparent the panel + // back to appropriate container and ignore it. + // TODO(varkha): Updating bounds during a drag can cause problems and a more + // general solution is needed. See http://crbug.com/251813 . + aura::Window* old_parent = child->parent(); + aura::client::ParentWindowWithContext( + child, child, child->GetRootWindow()->GetBoundsInScreen()); + wm::ReparentTransientChildrenOfChild(child, old_parent, child->parent()); + DCHECK(child->parent()->id() != kShellWindowId_PanelContainer); + return; + } + PanelInfo panel_info; + panel_info.window = child; + panel_info.callout_widget = new PanelCalloutWidget(panel_container_); + if (child != dragged_panel_) { + // Set the panel to 0 opacity until it has been positioned to prevent it + // from flashing briefly at position (0, 0). + child->layer()->SetOpacity(0); + panel_info.slide_in = true; + } + panel_windows_.push_back(panel_info); + child->AddObserver(this); + wm::GetWindowState(child)->AddObserver(this); + Relayout(); +} + +void PanelLayoutManager::OnWillRemoveWindowFromLayout(aura::Window* child) { +} + +void PanelLayoutManager::OnWindowRemovedFromLayout(aura::Window* child) { + if (child->type() == aura::client::WINDOW_TYPE_POPUP) + return; + PanelList::iterator found = + std::find(panel_windows_.begin(), panel_windows_.end(), child); + if (found != panel_windows_.end()) { + delete found->callout_widget; + panel_windows_.erase(found); + } + child->RemoveObserver(this); + wm::GetWindowState(child)->RemoveObserver(this); + + if (dragged_panel_ == child) + dragged_panel_ = NULL; + + if (last_active_panel_ == child) + last_active_panel_ = NULL; + + Relayout(); +} + +void PanelLayoutManager::OnChildWindowVisibilityChanged(aura::Window* child, + bool visible) { + Relayout(); +} + +void PanelLayoutManager::SetChildBounds(aura::Window* child, + const gfx::Rect& requested_bounds) { + gfx::Rect bounds(requested_bounds); + const gfx::Rect& max_bounds = panel_container_->GetRootWindow()->bounds(); + const int max_width = max_bounds.width() * kMaxWidthFactor; + const int max_height = max_bounds.height() * kMaxHeightFactor; + if (bounds.width() > max_width) + bounds.set_width(max_width); + if (bounds.height() > max_height) + bounds.set_height(max_height); + + // Reposition dragged panel in the panel order. + if (dragged_panel_ == child) { + PanelList::iterator dragged_panel_iter = + std::find(panel_windows_.begin(), panel_windows_.end(), dragged_panel_); + DCHECK(dragged_panel_iter != panel_windows_.end()); + PanelList::iterator new_position; + for (new_position = panel_windows_.begin(); + new_position != panel_windows_.end(); + ++new_position) { + const gfx::Rect& bounds = (*new_position).window->bounds(); + if (bounds.x() + bounds.width()/2 <= requested_bounds.x()) break; + } + if (new_position != dragged_panel_iter) { + PanelInfo dragged_panel_info = *dragged_panel_iter; + panel_windows_.erase(dragged_panel_iter); + panel_windows_.insert(new_position, dragged_panel_info); + } + } + + SetChildBoundsDirect(child, bounds); + Relayout(); +} + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager, ShelfIconObserver implementation: + +void PanelLayoutManager::OnShelfIconPositionsChanged() { + // TODO: As this is called for every animation step now. Relayout needs to be + // updated to use current icon position instead of use the ideal bounds so + // that the panels slide with their icons instead of jumping. + Relayout(); +} + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager, ash::ShellObserver implementation: + +void PanelLayoutManager::OnShelfAlignmentChanged(aura::Window* root_window) { + if (panel_container_->GetRootWindow() == root_window) + Relayout(); +} + +///////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager, WindowObserver implementation: + +void PanelLayoutManager::OnWindowShowTypeChanged( + wm::WindowState* window_state, + wm::WindowShowType old_type) { + // If the shelf is currently hidden then windows will not actually be shown + // but the set to restore when the shelf becomes visible is updated. + if (restore_windows_on_shelf_visible_) { + if (window_state->IsMinimized()) { + MinimizePanel(window_state->window()); + restore_windows_on_shelf_visible_->Remove(window_state->window()); + } else { + restore_windows_on_shelf_visible_->Add(window_state->window()); + } + return; + } + + if (window_state->IsMinimized()) + MinimizePanel(window_state->window()); + else + RestorePanel(window_state->window()); +} + +void PanelLayoutManager::OnWindowVisibilityChanged( + aura::Window* window, bool visible) { + if (visible) + wm::GetWindowState(window)->Restore(); +} + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager, aura::client::ActivationChangeObserver implementation: + +void PanelLayoutManager::OnWindowActivated(aura::Window* gained_active, + aura::Window* lost_active) { + // Ignore if the panel that is not managed by this was activated. + if (gained_active && + gained_active->type() == aura::client::WINDOW_TYPE_PANEL && + gained_active->parent() == panel_container_) { + UpdateStacking(gained_active); + UpdateCallouts(); + } +} + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager, DisplayController::Observer implementation: + +void PanelLayoutManager::OnDisplayConfigurationChanged() { + Relayout(); +} + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager, ShelfLayoutManagerObserver implementation: + +void PanelLayoutManager::WillChangeVisibilityState( + ShelfVisibilityState new_state) { + // On entering / leaving full screen mode the shelf visibility state is + // changed to / from SHELF_HIDDEN. In this state, panel windows should hide + // to allow the full-screen application to use the full screen. + bool shelf_hidden = new_state == ash::SHELF_HIDDEN; + if (!shelf_hidden) { + if (restore_windows_on_shelf_visible_) { + scoped_ptr<aura::WindowTracker> restore_windows( + restore_windows_on_shelf_visible_.Pass()); + for (aura::WindowTracker::Windows::const_iterator iter = + restore_windows->windows().begin(); iter != + restore_windows->windows().end(); ++iter) { + RestorePanel(*iter); + } + } + return; + } + + if (restore_windows_on_shelf_visible_) + return; + scoped_ptr<aura::WindowTracker> minimized_windows(new aura::WindowTracker); + for (PanelList::iterator iter = panel_windows_.begin(); + iter != panel_windows_.end(); ++iter) { + if (iter->window->IsVisible()) { + minimized_windows->Add(iter->window); + wm::GetWindowState(iter->window)->Minimize(); + } + } + restore_windows_on_shelf_visible_ = minimized_windows.Pass(); +} + +//////////////////////////////////////////////////////////////////////////////// +// PanelLayoutManager private implementation: + +void PanelLayoutManager::MinimizePanel(aura::Window* panel) { + views::corewm::SetWindowVisibilityAnimationType( + panel, WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE); + ui::Layer* layer = panel->layer(); + ui::ScopedLayerAnimationSettings panel_slide_settings(layer->GetAnimator()); + panel_slide_settings.SetPreemptionStrategy( + ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET); + panel_slide_settings.SetTransitionDuration( + base::TimeDelta::FromMilliseconds(kPanelSlideDurationMilliseconds)); + gfx::Rect bounds(panel->bounds()); + bounds.Offset(GetSlideInAnimationOffset( + launcher_->shelf_widget()->GetAlignment())); + SetChildBoundsDirect(panel, bounds); + panel->Hide(); + PanelList::iterator found = + std::find(panel_windows_.begin(), panel_windows_.end(), panel); + if (found != panel_windows_.end()) { + layer->SetOpacity(0); + // The next time the window is visible it should slide into place. + found->slide_in = true; + } + if (wm::IsActiveWindow(panel)) + wm::DeactivateWindow(panel); + Relayout(); +} + +void PanelLayoutManager::RestorePanel(aura::Window* panel) { + panel->Show(); + Relayout(); +} + +void PanelLayoutManager::Relayout() { + if (!launcher_ || !launcher_->shelf_widget()) + return; + + if (in_layout_) + return; + base::AutoReset<bool> auto_reset_in_layout(&in_layout_, true); + + ShelfAlignment alignment = launcher_->shelf_widget()->GetAlignment(); + bool horizontal = alignment == SHELF_ALIGNMENT_TOP || + alignment == SHELF_ALIGNMENT_BOTTOM; + gfx::Rect launcher_bounds = ash::ScreenAsh::ConvertRectFromScreen( + panel_container_, launcher_->shelf_widget()->GetWindowBoundsInScreen()); + int panel_start_bounds = kPanelIdealSpacing; + int panel_end_bounds = horizontal ? + panel_container_->bounds().width() - kPanelIdealSpacing : + panel_container_->bounds().height() - kPanelIdealSpacing; + aura::Window* active_panel = NULL; + std::vector<VisiblePanelPositionInfo> visible_panels; + for (PanelList::iterator iter = panel_windows_.begin(); + iter != panel_windows_.end(); ++iter) { + aura::Window* panel = iter->window; + iter->callout_widget->SetAlignment(alignment); + + // Consider the dragged panel as part of the layout as long as it is + // touching the launcher. + if (!panel->IsVisible() || + (panel == dragged_panel_ && + !BoundsAdjacent(panel->bounds(), launcher_bounds))) { + continue; + } + + // If the shelf is currently hidden (full-screen mode), minimize panel until + // full-screen mode is exited. + if (restore_windows_on_shelf_visible_) { + wm::GetWindowState(panel)->Minimize(); + restore_windows_on_shelf_visible_->Add(panel); + continue; + } + + gfx::Rect icon_bounds = + launcher_->GetScreenBoundsOfItemIconForWindow(panel); + + // If both the icon width and height are 0 then there is no icon in the + // launcher. If the launcher is hidden, one of the height or width will be + // 0 but the position in the launcher and major dimension is still reported + // correctly and the panel can be aligned above where the hidden icon is. + if (icon_bounds.width() == 0 && icon_bounds.height() == 0) + continue; + + if (panel->HasFocus() || + panel->Contains( + aura::client::GetFocusClient(panel)->GetFocusedWindow())) { + DCHECK(!active_panel); + active_panel = panel; + } + icon_bounds = ScreenAsh::ConvertRectFromScreen(panel_container_, + icon_bounds); + gfx::Point icon_origin = icon_bounds.origin(); + VisiblePanelPositionInfo position_info; + int icon_start = horizontal ? icon_origin.x() : icon_origin.y(); + int icon_end = icon_start + (horizontal ? icon_bounds.width() : + icon_bounds.height()); + position_info.major_length = horizontal ? + panel->bounds().width() : panel->bounds().height(); + position_info.min_major = std::max( + panel_start_bounds + position_info.major_length / 2, + icon_end - position_info.major_length / 2); + position_info.max_major = std::min( + icon_start + position_info.major_length / 2, + panel_end_bounds - position_info.major_length / 2); + position_info.major_pos = (icon_start + icon_end) / 2; + position_info.window = panel; + position_info.slide_in = iter->slide_in; + iter->slide_in = false; + visible_panels.push_back(position_info); + } + + // Sort panels by their X positions and fan out groups of overlapping panels. + // The fan out method may result in new overlapping panels however given that + // the panels start at least a full panel width apart this overlap will + // never completely obscure a panel. + // TODO(flackr): Rearrange panels if new overlaps are introduced. + std::sort(visible_panels.begin(), visible_panels.end(), CompareWindowMajor); + size_t first_overlapping_panel = 0; + for (size_t i = 1; i < visible_panels.size(); ++i) { + if (visible_panels[i - 1].major_pos + + visible_panels[i - 1].major_length / 2 < visible_panels[i].major_pos - + visible_panels[i].major_length / 2) { + FanOutPanels(visible_panels.begin() + first_overlapping_panel, + visible_panels.begin() + i); + first_overlapping_panel = i; + } + } + FanOutPanels(visible_panels.begin() + first_overlapping_panel, + visible_panels.end()); + + for (size_t i = 0; i < visible_panels.size(); ++i) { + if (visible_panels[i].window == dragged_panel_) + continue; + bool slide_in = visible_panels[i].slide_in; + gfx::Rect bounds = visible_panels[i].window->GetTargetBounds(); + switch (alignment) { + case SHELF_ALIGNMENT_BOTTOM: + bounds.set_y(launcher_bounds.y() - bounds.height()); + break; + case SHELF_ALIGNMENT_LEFT: + bounds.set_x(launcher_bounds.right()); + break; + case SHELF_ALIGNMENT_RIGHT: + bounds.set_x(launcher_bounds.x() - bounds.width()); + break; + case SHELF_ALIGNMENT_TOP: + bounds.set_y(launcher_bounds.bottom()); + break; + } + bool on_launcher = visible_panels[i].window->GetTargetBounds() == bounds; + + if (horizontal) { + bounds.set_x(visible_panels[i].major_pos - + visible_panels[i].major_length / 2); + } else { + bounds.set_y(visible_panels[i].major_pos - + visible_panels[i].major_length / 2); + } + + ui::Layer* layer = visible_panels[i].window->layer(); + if (slide_in) { + // New windows shift up from the launcher into position. + gfx::Rect initial_bounds(bounds); + initial_bounds.Offset(GetSlideInAnimationOffset(alignment)); + SetChildBoundsDirect(visible_panels[i].window, initial_bounds); + // Set on launcher so that the panel animates into its target position. + on_launcher = true; + } + + if (on_launcher) { + ui::ScopedLayerAnimationSettings panel_slide_settings( + layer->GetAnimator()); + panel_slide_settings.SetPreemptionStrategy( + ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET); + panel_slide_settings.SetTransitionDuration( + base::TimeDelta::FromMilliseconds(kPanelSlideDurationMilliseconds)); + SetChildBoundsDirect(visible_panels[i].window, bounds); + if (slide_in) + layer->SetOpacity(1); + } else { + // If the launcher moved don't animate, move immediately to the new + // target location. + SetChildBoundsDirect(visible_panels[i].window, bounds); + } + } + + UpdateStacking(active_panel); + UpdateCallouts(); +} + +void PanelLayoutManager::UpdateStacking(aura::Window* active_panel) { + if (!active_panel) { + if (!last_active_panel_) + return; + active_panel = last_active_panel_; + } + + ShelfAlignment alignment = launcher_->alignment(); + bool horizontal = alignment == SHELF_ALIGNMENT_TOP || + alignment == SHELF_ALIGNMENT_BOTTOM; + + // We want to to stack the panels like a deck of cards: + // ,--,--,--,-------.--.--. + // | | | | | | | + // | | | | | | | + // + // We use the middle of each panel to figure out how to stack the panels. This + // allows us to update the stacking when a panel is being dragged around by + // the titlebar--even though it doesn't update the launcher icon positions, we + // still want the visual effect. + std::map<int, aura::Window*> window_ordering; + for (PanelList::const_iterator it = panel_windows_.begin(); + it != panel_windows_.end(); ++it) { + gfx::Rect bounds = it->window->bounds(); + window_ordering.insert(std::make_pair(horizontal ? + bounds.x() + bounds.width() / 2 : + bounds.y() + bounds.height() / 2, + it->window)); + } + + aura::Window* previous_panel = NULL; + for (std::map<int, aura::Window*>::const_iterator it = + window_ordering.begin(); + it != window_ordering.end() && it->second != active_panel; ++it) { + if (previous_panel) + panel_container_->StackChildAbove(it->second, previous_panel); + previous_panel = it->second; + } + + previous_panel = NULL; + for (std::map<int, aura::Window*>::const_reverse_iterator it = + window_ordering.rbegin(); + it != window_ordering.rend() && it->second != active_panel; ++it) { + if (previous_panel) + panel_container_->StackChildAbove(it->second, previous_panel); + previous_panel = it->second; + } + + panel_container_->StackChildAtTop(active_panel); + if (dragged_panel_ && dragged_panel_->parent() == panel_container_) + panel_container_->StackChildAtTop(dragged_panel_); + last_active_panel_ = active_panel; +} + +void PanelLayoutManager::UpdateCallouts() { + ShelfAlignment alignment = launcher_->alignment(); + bool horizontal = alignment == SHELF_ALIGNMENT_TOP || + alignment == SHELF_ALIGNMENT_BOTTOM; + + for (PanelList::iterator iter = panel_windows_.begin(); + iter != panel_windows_.end(); ++iter) { + aura::Window* panel = iter->window; + views::Widget* callout_widget = iter->callout_widget; + + gfx::Rect current_bounds = panel->GetBoundsInScreen(); + gfx::Rect bounds = ScreenAsh::ConvertRectToScreen(panel->parent(), + panel->GetTargetBounds()); + gfx::Rect icon_bounds = + launcher_->GetScreenBoundsOfItemIconForWindow(panel); + if (icon_bounds.IsEmpty() || !panel->layer()->GetTargetVisibility() || + panel == dragged_panel_) { + callout_widget->Hide(); + callout_widget->GetNativeWindow()->layer()->SetOpacity(0); + continue; + } + + gfx::Rect callout_bounds = callout_widget->GetWindowBoundsInScreen(); + gfx::Vector2d slide_vector = bounds.origin() - current_bounds.origin(); + int slide_distance = horizontal ? slide_vector.x() : slide_vector.y(); + int distance_until_over_panel = 0; + if (horizontal) { + callout_bounds.set_x( + icon_bounds.x() + (icon_bounds.width() - callout_bounds.width()) / 2); + distance_until_over_panel = std::max( + current_bounds.x() - callout_bounds.x(), + callout_bounds.right() - current_bounds.right()); + } else { + callout_bounds.set_y( + icon_bounds.y() + (icon_bounds.height() - + callout_bounds.height()) / 2); + distance_until_over_panel = std::max( + current_bounds.y() - callout_bounds.y(), + callout_bounds.bottom() - current_bounds.bottom()); + } + switch (alignment) { + case SHELF_ALIGNMENT_BOTTOM: + callout_bounds.set_y(bounds.bottom()); + break; + case SHELF_ALIGNMENT_LEFT: + callout_bounds.set_x(bounds.x() - callout_bounds.width()); + break; + case SHELF_ALIGNMENT_RIGHT: + callout_bounds.set_x(bounds.right()); + break; + case SHELF_ALIGNMENT_TOP: + callout_bounds.set_y(bounds.y() - callout_bounds.height()); + break; + } + callout_bounds = ScreenAsh::ConvertRectFromScreen( + callout_widget->GetNativeWindow()->parent(), + callout_bounds); + + SetChildBoundsDirect(callout_widget->GetNativeWindow(), callout_bounds); + panel_container_->StackChildAbove(callout_widget->GetNativeWindow(), + panel); + callout_widget->Show(); + + ui::Layer* layer = callout_widget->GetNativeWindow()->layer(); + // If the panel is not over the callout position or has just become visible + // then fade in the callout. + if ((distance_until_over_panel > 0 || layer->GetTargetOpacity() < 1) && + panel->layer()->GetTargetTransform().IsIdentity()) { + if (distance_until_over_panel > 0 && + slide_distance >= distance_until_over_panel) { + layer->SetOpacity(0); + // If the panel is not yet over the callout, then delay fading in + // the callout until after the panel should be over it. + int delay = kPanelSlideDurationMilliseconds * + distance_until_over_panel / slide_distance; + layer->SetOpacity(0); + layer->GetAnimator()->StopAnimating(); + layer->GetAnimator()->SchedulePauseForProperties( + base::TimeDelta::FromMilliseconds(delay), + ui::LayerAnimationElement::OPACITY); + } + { + ui::ScopedLayerAnimationSettings callout_settings(layer->GetAnimator()); + callout_settings.SetPreemptionStrategy( + ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS); + callout_settings.SetTransitionDuration( + base::TimeDelta::FromMilliseconds( + kCalloutFadeDurationMilliseconds)); + layer->SetOpacity(1); + } + } + } +} + +//////////////////////////////////////////////////////////////////////////////// +// keyboard::KeyboardControllerObserver implementation: + +void PanelLayoutManager::OnKeyboardBoundsChanging( + const gfx::Rect& keyboard_bounds) { + // This bounds change will have caused a change to the Shelf which does not + // propogate automatically to this class, so manually recalculate bounds. + OnWindowResized(); +} + +} // namespace internal +} // namespace ash |