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// 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/system/status_area_widget_delegate.h"
#include "ash/ash_export.h"
#include "ash/ash_switches.h"
#include "ash/focus_cycler.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "ash/system/tray/tray_constants.h"
#include "base/strings/utf_string_conversions.h"
#include "ui/aura/root_window.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/image/image.h"
#include "ui/views/accessible_pane_view.h"
#include "ui/views/layout/grid_layout.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace internal {
namespace {
const int kStatusTrayOffsetFromScreenEdge = 4;
}
StatusAreaWidgetDelegate::StatusAreaWidgetDelegate()
: focus_cycler_for_testing_(NULL),
alignment_(SHELF_ALIGNMENT_BOTTOM) {
// Allow the launcher to surrender the focus to another window upon
// navigation completion by the user.
set_allow_deactivate_on_esc(true);
}
StatusAreaWidgetDelegate::~StatusAreaWidgetDelegate() {
}
void StatusAreaWidgetDelegate::SetFocusCyclerForTesting(
const FocusCycler* focus_cycler) {
focus_cycler_for_testing_ = focus_cycler;
}
views::View* StatusAreaWidgetDelegate::GetDefaultFocusableChild() {
return child_at(0);
}
views::Widget* StatusAreaWidgetDelegate::GetWidget() {
return View::GetWidget();
}
const views::Widget* StatusAreaWidgetDelegate::GetWidget() const {
return View::GetWidget();
}
void StatusAreaWidgetDelegate::OnGestureEvent(ui::GestureEvent* event) {
if (gesture_handler_.ProcessGestureEvent(*event))
event->StopPropagation();
else
views::AccessiblePaneView::OnGestureEvent(event);
}
bool StatusAreaWidgetDelegate::CanActivate() const {
// We don't want mouse clicks to activate us, but we need to allow
// activation when the user is using the keyboard (FocusCycler).
const FocusCycler* focus_cycler = focus_cycler_for_testing_ ?
focus_cycler_for_testing_ : Shell::GetInstance()->focus_cycler();
return focus_cycler->widget_activating() == GetWidget();
}
void StatusAreaWidgetDelegate::DeleteDelegate() {
}
void StatusAreaWidgetDelegate::AddTray(views::View* tray) {
SetLayoutManager(NULL); // Reset layout manager before adding a child.
AddChildView(tray);
// Set the layout manager with the new list of children.
UpdateLayout();
}
void StatusAreaWidgetDelegate::UpdateLayout() {
// Use a grid layout so that the trays can be centered in each cell, and
// so that the widget gets laid out correctly when tray sizes change.
views::GridLayout* layout = new views::GridLayout(this);
SetLayoutManager(layout);
views::ColumnSet* columns = layout->AddColumnSet(0);
if (alignment_ == SHELF_ALIGNMENT_BOTTOM ||
alignment_ == SHELF_ALIGNMENT_TOP) {
if (alignment_ == SHELF_ALIGNMENT_TOP)
layout->SetInsets(kStatusTrayOffsetFromScreenEdge, 0, 0, 0);
else
layout->SetInsets(0, 0, kStatusTrayOffsetFromScreenEdge, 0);
bool is_first_visible_child = true;
for (int c = 0; c < child_count(); ++c) {
views::View* child = child_at(c);
if (!child->visible())
continue;
if (!is_first_visible_child)
columns->AddPaddingColumn(0, GetTraySpacing());
is_first_visible_child = false;
columns->AddColumn(views::GridLayout::CENTER, views::GridLayout::FILL,
0, /* resize percent */
views::GridLayout::USE_PREF, 0, 0);
}
layout->StartRow(0, 0);
for (int c = child_count() - 1; c >= 0; --c) {
views::View* child = child_at(c);
if (child->visible())
layout->AddView(child);
}
} else {
if (alignment_ == SHELF_ALIGNMENT_LEFT)
layout->SetInsets(0, kStatusTrayOffsetFromScreenEdge, 0, 0);
else
layout->SetInsets(0, 0, 0, kStatusTrayOffsetFromScreenEdge);
columns->AddColumn(views::GridLayout::FILL, views::GridLayout::CENTER,
0, /* resize percent */
views::GridLayout::USE_PREF, 0, 0);
bool is_first_visible_child = true;
for (int c = child_count() - 1; c >= 0; --c) {
views::View* child = child_at(c);
if (!child->visible())
continue;
if (!is_first_visible_child)
layout->AddPaddingRow(0, GetTraySpacing());
is_first_visible_child = false;
layout->StartRow(0, 0);
layout->AddView(child);
}
}
Layout();
UpdateWidgetSize();
}
void StatusAreaWidgetDelegate::ChildPreferredSizeChanged(View* child) {
// Need to resize the window when trays or items are added/removed.
UpdateWidgetSize();
}
void StatusAreaWidgetDelegate::ChildVisibilityChanged(View* child) {
UpdateLayout();
}
void StatusAreaWidgetDelegate::UpdateWidgetSize() {
if (GetWidget())
GetWidget()->SetSize(GetPreferredSize());
}
} // namespace internal
} // namespace ash
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