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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 "chrome/browser/chromeos/status/status_area_view.h"
#include <algorithm>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/message_loop.h"
#include "chrome/browser/chromeos/view_ids.h"
#include "ui/gfx/canvas.h"
#include "ui/views/border.h"
#if defined(USE_ASH)
#include "ash/focus_cycler.h"
#include "ash/shell.h"
#endif
// Number of pixels to separate each icon.
const int kSeparation = 0;
StatusAreaView::StatusAreaView()
: need_return_focus_(false),
skip_next_focus_return_(true) {
set_id(VIEW_ID_STATUS_AREA);
}
StatusAreaView::~StatusAreaView() {
}
void StatusAreaView::AddButton(StatusAreaButton* button, ButtonBorder border) {
buttons_.push_back(button);
if (border == HAS_BORDER)
button->set_border(views::Border::CreateEmptyBorder(0, 1, 0, 0));
AddChildView(button);
UpdateButtonVisibility();
}
void StatusAreaView::RemoveButton(StatusAreaButton* button) {
std::list<StatusAreaButton*>::iterator iter =
std::find(buttons_.begin(), buttons_.end(), button);
if (iter != buttons_.end()) {
RemoveChildView(*iter);
buttons_.erase(iter);
}
UpdateButtonVisibility();
}
// views::View* overrides.
gfx::Size StatusAreaView::GetPreferredSize() {
int result_w = 0;
int result_h = 0;
for (int i = 0; i < child_count(); i++) {
views::View* cur = child_at(i);
gfx::Size cur_size = cur->GetPreferredSize();
if (cur->visible() && !cur_size.IsEmpty()) {
if (result_w == 0)
result_w = kSeparation;
// Add each width.
result_w += cur_size.width() + kSeparation;
// Use max height.
result_h = std::max(result_h, cur_size.height());
}
}
return gfx::Size(result_w, result_h);
}
void StatusAreaView::Layout() {
int cur_x = kSeparation;
for (int i = 0; i < child_count(); i++) {
views::View* cur = child_at(i);
gfx::Size cur_size = cur->GetPreferredSize();
if (cur->visible() && !cur_size.IsEmpty()) {
int cur_y = (height() - cur_size.height()) / 2;
// Handle odd number of pixels.
cur_y += (height() - cur_size.height()) % 2;
// Put next in row horizontally, and center vertically.
cur->SetBounds(cur_x, cur_y, cur_size.width(), cur_size.height());
cur_x += cur_size.width() + kSeparation;
}
}
}
void StatusAreaView::PreferredSizeChanged() {
if (GetWidget())
GetWidget()->SetSize(GetPreferredSize());
views::AccessiblePaneView::PreferredSizeChanged();
}
void StatusAreaView::ChildPreferredSizeChanged(View* child) {
// When something like the clock menu button's size changes, we need to
// relayout. Also mark that this view's size has changed. This will let
// BrowserView know to relayout, which will reset the bounds of this view.
Layout();
PreferredSizeChanged();
}
bool StatusAreaView::CanActivate() const {
#if defined(USE_ASH)
// We don't want mouse clicks to activate us, but we need to allow
// activation when the user is using the keyboard, such as by the FocusCycler
// or on the Login screen.
ash::internal::FocusCycler* focus_cycler =
ash::Shell::GetInstance()->focus_cycler();
return focus_cycler->widget_activating() == GetWidget() ||
need_return_focus_;
#else
return false;
#endif
}
void StatusAreaView::DeleteDelegate() {
#if defined(USE_ASH)
// If this is used as the content-view of the widget, then do nothing, since
// deleting the widget will end up deleting this. But if this is used only as
// the widget-delegate, then delete this now.
if (!GetWidget()) {
delete this;
return;
}
#endif
WidgetDelegate::DeleteDelegate();
}
views::Widget* StatusAreaView::GetWidget() {
return View::GetWidget();
}
const views::Widget* StatusAreaView::GetWidget() const {
return View::GetWidget();
}
void StatusAreaView::MakeButtonsActive(bool active) {
for (std::list<StatusAreaButton*>::iterator iter = buttons_.begin();
iter != buttons_.end(); ++iter) {
(*iter)->SetMenuActive(active);
}
}
void StatusAreaView::UpdateButtonVisibility() {
Layout();
PreferredSizeChanged();
}
void StatusAreaView::UpdateButtonTextStyle() {
for (std::list<StatusAreaButton*>::const_iterator it = buttons_.begin();
it != buttons_.end(); ++it) {
StatusAreaButton* button = *it;
button->UpdateTextStyle();
}
}
void StatusAreaView::TakeFocus(
bool reverse,
const ReturnFocusCallback& return_focus_cb) {
SetPaneFocus(reverse ? GetLastFocusableChild() : GetFirstFocusableChild());
need_return_focus_ = true;
return_focus_cb_ = return_focus_cb;
GetWidget()->AddObserver(this);
}
void StatusAreaView::ReturnFocus(bool reverse) {
ClearFocus();
return_focus_cb_.Run(reverse);
}
void StatusAreaView::ClearFocus() {
GetWidget()->RemoveObserver(this);
RemovePaneFocus();
focus_manager_->ClearFocus();
need_return_focus_ = false;
}
void StatusAreaView::OnDidChangeFocus(views::View* focused_before,
views::View* focused_now) {
views::AccessiblePaneView::OnDidChangeFocus(focused_before, focused_now);
if (need_return_focus_ && !skip_next_focus_return_) {
const views::View* first = GetFirstFocusableChild();
const views::View* last = GetLastFocusableChild();
const bool first_to_last = (focused_before == first && focused_now == last);
const bool last_to_first = (focused_now == first && focused_before == last);
if (first_to_last || last_to_first)
ReturnFocus(first_to_last);
}
skip_next_focus_return_ = false;
}
void StatusAreaView::OnWidgetActivationChanged(views::Widget* widget,
bool active) {
if (!active)
ClearFocus();
}
bool StatusAreaView::AcceleratorPressed(const ui::Accelerator& accelerator) {
if (need_return_focus_ && accelerator.key_code() == ui::VKEY_ESCAPE) {
// Override Escape handling to return focus back.
ReturnFocus(false);
return true;
} else if (accelerator.key_code() == ui::VKEY_HOME ||
accelerator.key_code() == ui::VKEY_END) {
// Do not return focus if it wraps right after pressing Home/End.
skip_next_focus_return_ = true;
}
return AccessiblePaneView::AcceleratorPressed(accelerator);
}
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