// 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/screen_util.h"
#include "ash/shelf/shelf.h"
#include "ash/shelf/shelf_layout_manager.h"
#include "ash/shelf/shelf_types.h"
#include "ash/shelf/shelf_util.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/focus_client.h"
#include "ui/aura/client/window_tree_client.h"
#include "ui/aura/window.h"
#include "ui/aura/window_delegate.h"
#include "ui/aura/window_event_dispatcher.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"
#include "ui/wm/public/activation_client.h"
namespace ash {
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 shelf. 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.keep_on_top = true;
params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
params.parent = parent;
params.bounds = ScreenUtil::ConvertRectToScreen(parent, gfx::Rect());
params.bounds.set_width(kArrowWidth);
params.bounds.set_height(kArrowHeight);
params.accept_events = 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),
show_callout_widgets_(true),
dragged_panel_(NULL),
shelf_(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 (shelf_)
shelf_->RemoveIconObserver(this);
shelf_ = 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::SetShelf(Shelf* shelf) {
DCHECK(!shelf_);
DCHECK(!shelf_layout_manager_);
shelf_ = shelf;
shelf_->AddIconObserver(this);
if (shelf_->shelf_widget()) {
shelf_layout_manager_ = ash::ShelfLayoutManager::ForShelf(
shelf_->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();
}
void PanelLayoutManager::SetShowCalloutWidgets(bool show) {
if (show_callout_widgets_ == show)
return;
show_callout_widgets_ = show;
UpdateCallouts();
}
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() == ui::wm::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_);
panel_info.slide_in = child != dragged_panel_;
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() == ui::wm::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);
}
if (restore_windows_on_shelf_visible_)
restore_windows_on_shelf_visible_->Remove(child);
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) {
if (visible)
wm::GetWindowState(child)->Restore();
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);
}
}
// Respect the minimum size of the window.
if (child->delegate()) {
const gfx::Size& min_size = child->delegate()->GetMinimumSize();
bounds.set_width(std::max(min_size.width(), bounds.width()));
bounds.set_height(std::max(min_size.height(), bounds.height()));
}
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::OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) {
// Trigger a relayout to position the panels whenever the panel icon is set
// or changes.
if (key == kShelfID)
Relayout();
}
/////////////////////////////////////////////////////////////////////////////
// PanelLayoutManager, WindowStateObserver implementation:
void PanelLayoutManager::OnPostWindowStateTypeChange(
wm::WindowState* window_state,
wm::WindowStateType 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());
}
////////////////////////////////////////////////////////////////////////////////
// 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() == ui::wm::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();) {
aura::Window* window = iter->window;
// Minimizing a panel window may remove it from the panel_windows_ list.
// Advance the iterator before minimizing it: http://crbug.com/393047.
++iter;
if (window != dragged_panel_ && window->IsVisible()) {
minimized_windows->Add(window);
wm::GetWindowState(window)->Minimize();
}
}
restore_windows_on_shelf_visible_ = minimized_windows.Pass();
}
////////////////////////////////////////////////////////////////////////////////
// PanelLayoutManager private implementation:
void PanelLayoutManager::MinimizePanel(aura::Window* panel) {
::wm::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(
shelf_->shelf_widget()->GetAlignment()));
SetChildBoundsDirect(panel, bounds);
panel->Hide();
layer->SetOpacity(0);
if (wm::IsActiveWindow(panel))
wm::DeactivateWindow(panel);
Relayout();
}
void PanelLayoutManager::RestorePanel(aura::Window* panel) {
PanelList::iterator found =
std::find(panel_windows_.begin(), panel_windows_.end(), panel);
DCHECK(found != panel_windows_.end());
found->slide_in = true;
Relayout();
}
void PanelLayoutManager::Relayout() {
if (!shelf_ || !shelf_->shelf_widget())
return;
if (in_layout_)
return;
base::AutoReset<bool> auto_reset_in_layout(&in_layout_, true);
ShelfAlignment alignment = shelf_->shelf_widget()->GetAlignment();
bool horizontal = alignment == SHELF_ALIGNMENT_TOP ||
alignment == SHELF_ALIGNMENT_BOTTOM;
gfx::Rect shelf_bounds = ash::ScreenUtil::ConvertRectFromScreen(
panel_container_, shelf_->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 shelf.
if ((!panel->IsVisible() && !iter->slide_in) ||
(panel == dragged_panel_ &&
!BoundsAdjacent(panel->bounds(), shelf_bounds))) {
continue;
}
// If the shelf is currently hidden (full-screen mode), minimize panel until
// full-screen mode is exited. When a panel is dragged from another display
// the shelf state does not update before the panel is added so we exclude
// the dragged panel.
if (panel != dragged_panel_ && restore_windows_on_shelf_visible_) {
wm::GetWindowState(panel)->Minimize();
restore_windows_on_shelf_visible_->Add(panel);
continue;
}
gfx::Rect icon_bounds = shelf_->GetScreenBoundsOfItemIconForWindow(panel);
// If both the icon width and height are 0 then there is no icon in the
// shelf. If the shelf is hidden, one of the height or width will be
// 0 but the position in the shelf 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 = ScreenUtil::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(shelf_bounds.y() - bounds.height());
break;
case SHELF_ALIGNMENT_LEFT:
bounds.set_x(shelf_bounds.right());
break;
case SHELF_ALIGNMENT_RIGHT:
bounds.set_x(shelf_bounds.x() - bounds.width());
break;
case SHELF_ALIGNMENT_TOP:
bounds.set_y(shelf_bounds.bottom());
break;
}
bool on_shelf = 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 shelf into position and fade in.
layer->SetOpacity(0);
gfx::Rect initial_bounds(bounds);
initial_bounds.Offset(GetSlideInAnimationOffset(alignment));
SetChildBoundsDirect(visible_panels[i].window, initial_bounds);
// Set on shelf so that the panel animates into its target position.
on_shelf = true;
}
if (on_shelf) {
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);
visible_panels[i].window->Show();
}
} else {
// If the shelf 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 = shelf_->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 shelf 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 = shelf_->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 = ScreenUtil::ConvertRectToScreen(
panel->parent(),
panel->GetTargetBounds());
gfx::Rect icon_bounds = shelf_->GetScreenBoundsOfItemIconForWindow(panel);
if (icon_bounds.IsEmpty() || !panel->layer()->GetTargetVisibility() ||
panel == dragged_panel_ || !show_callout_widgets_) {
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 = ScreenUtil::ConvertRectFromScreen(
callout_widget->GetNativeWindow()->parent(),
callout_bounds);
SetChildBoundsDirect(callout_widget->GetNativeWindow(), callout_bounds);
panel_container_->StackChildAbove(callout_widget->GetNativeWindow(),
panel);
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)) {
if (distance_until_over_panel > 0 &&
slide_distance >= distance_until_over_panel) {
// 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);
}
// Show after changing the opacity animation. This way we don't have a
// state where the widget is visible but the opacity is 0.
callout_widget->Show();
}
}
////////////////////////////////////////////////////////////////////////////////
// keyboard::KeyboardControllerObserver implementation:
void PanelLayoutManager::OnKeyboardBoundsChanging(
const gfx::Rect& keyboard_bounds) {
gfx::Rect parent_bounds = panel_container_->bounds();
int available_space = parent_bounds.height() - keyboard_bounds.height();
for (PanelList::iterator iter = panel_windows_.begin();
iter != panel_windows_.end();
++iter) {
aura::Window* panel = iter->window;
wm::WindowState* panel_state = wm::GetWindowState(panel);
if (keyboard_bounds.height() > 0) {
// Save existing bounds, so that we can restore them when the keyboard
// hides.
panel_state->SaveCurrentBoundsForRestore();
gfx::Rect panel_bounds = ScreenUtil::ConvertRectToScreen(
panel->parent(), panel->GetTargetBounds());
int delta = panel_bounds.height() - available_space;
// Ensure panels are not pushed above the parent boundaries, shrink any
// panels that violate this constraint.
if (delta > 0) {
SetChildBounds(panel,
gfx::Rect(panel_bounds.x(),
panel_bounds.y() + delta,
panel_bounds.width(),
panel_bounds.height() - delta));
}
} else if (panel_state->HasRestoreBounds()) {
// Keyboard hidden, restore original bounds if they exist.
SetChildBounds(panel, panel_state->GetRestoreBoundsInScreen());
}
}
// 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 ash