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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 "ui/app_list/app_list_item_view.h"
#include <algorithm>
#include "base/utf_string_conversions.h"
#include "ui/app_list/app_list_constants.h"
#include "ui/app_list/app_list_item_model.h"
#include "ui/app_list/apps_grid_view.h"
#include "ui/app_list/drop_shadow_label.h"
#include "ui/base/accessibility/accessible_view_state.h"
#include "ui/base/animation/throb_animation.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/font.h"
#include "ui/gfx/image/image_skia_operations.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/controls/menu/menu_item_view.h"
#include "ui/views/controls/menu/menu_model_adapter.h"
#include "ui/views/controls/menu/menu_runner.h"
namespace app_list {
namespace {
const int kTopBottomPadding = 10;
const int kTopPadding = 20;
const int kIconTitleSpacing = 7;
const SkColor kTitleColor = SkColorSetRGB(0x5A, 0x5A, 0x5A);
const SkColor kTitleHoverColor = SkColorSetRGB(0x3C, 0x3C, 0x3C);
const SkColor kTitleBackgroundColor = SkColorSetRGB(0xFC, 0xFC, 0xFC);
const SkColor kHoverAndPushedColor = SkColorSetARGB(0x19, 0, 0, 0);
const SkColor kSelectedColor = SkColorSetARGB(0x0D, 0, 0, 0);
const SkColor kHighlightedColor = kHoverAndPushedColor;
const int kTitleFontSize = 11;
const int kLeftRightPaddingChars = 1;
const gfx::Font& GetTitleFont() {
static gfx::Font* font = NULL;
// Reuses current font.
if (font)
return *font;
ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
gfx::Font title_font(rb.GetFont(ui::ResourceBundle::BaseFont).GetFontName(),
kTitleFontSize);
title_font = title_font.DeriveFont(0, gfx::Font::BOLD);
font = new gfx::Font(title_font);
return *font;
}
// An image view that is not interactive.
class StaticImageView : public views::ImageView {
public:
StaticImageView() : ImageView() {
}
private:
// views::View overrides:
virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE {
return false;
}
DISALLOW_COPY_AND_ASSIGN(StaticImageView);
};
} // namespace
// static
const char AppListItemView::kViewClassName[] = "ui/app_list/AppListItemView";
AppListItemView::AppListItemView(AppsGridView* apps_grid_view,
AppListItemModel* model,
views::ButtonListener* listener)
: CustomButton(listener),
model_(model),
apps_grid_view_(apps_grid_view),
icon_(new StaticImageView),
title_(new DropShadowLabel) {
title_->SetBackgroundColor(kTitleBackgroundColor);
title_->SetEnabledColor(kTitleColor);
title_->SetFont(GetTitleFont());
const gfx::ShadowValue kIconShadows[] = {
gfx::ShadowValue(gfx::Point(0, 2), 2, SkColorSetARGB(0x24, 0, 0, 0)),
};
icon_shadows_.assign(kIconShadows, kIconShadows + arraysize(kIconShadows));
AddChildView(icon_);
AddChildView(title_);
ItemIconChanged();
ItemTitleChanged();
model_->AddObserver(this);
set_context_menu_controller(this);
set_request_focus_on_press(false);
}
AppListItemView::~AppListItemView() {
model_->RemoveObserver(this);
}
void AppListItemView::SetIconSize(const gfx::Size& size) {
if (icon_size_ == size)
return;
icon_size_ = size;
UpdateIcon();
}
void AppListItemView::UpdateIcon() {
// Skip if |icon_size_| has not been determined.
if (icon_size_.IsEmpty())
return;
gfx::ImageSkia icon = model_->icon();
// Clear icon and bail out if model icon is empty.
if (icon.isNull()) {
icon_->SetImage(NULL);
return;
}
gfx::ImageSkia resized(gfx::ImageSkiaOperations::CreateResizedImage(icon,
skia::ImageOperations::RESIZE_BEST, icon_size_));
gfx::ImageSkia shadow(
gfx::ImageSkiaOperations::CreateImageWithDropShadow(resized,
icon_shadows_));
icon_->SetImage(shadow);
}
void AppListItemView::ItemIconChanged() {
UpdateIcon();
}
void AppListItemView::ItemTitleChanged() {
title_->SetText(UTF8ToUTF16(model_->title()));
}
void AppListItemView::ItemHighlightedChanged() {
apps_grid_view_->EnsureItemVisible(this);
SchedulePaint();
}
std::string AppListItemView::GetClassName() const {
return kViewClassName;
}
void AppListItemView::Layout() {
gfx::Rect rect(GetContentsBounds());
int left_right_padding = kLeftRightPaddingChars *
title_->font().GetAverageCharacterWidth();
gfx::Size title_size = title_->GetPreferredSize();
rect.Inset(left_right_padding, kTopPadding);
int y = rect.y();
gfx::Rect icon_bounds(rect.x(), y, rect.width(), icon_size_.height());
icon_bounds.Inset(gfx::ShadowValue::GetMargin(icon_shadows_));
icon_->SetBoundsRect(icon_bounds);
title_->SetBounds(rect.x(),
y + icon_size_.height() + kIconTitleSpacing,
rect.width(),
title_size.height());
}
void AppListItemView::OnPaint(gfx::Canvas* canvas) {
gfx::Rect rect(GetContentsBounds());
bool selected = apps_grid_view_->IsSelectedItem(this);
canvas->FillRect(rect, kContentsBackgroundColor);
if (model_->highlighted()) {
canvas->FillRect(rect, kHighlightedColor);
} else if (hover_animation_->is_animating()) {
int alpha = SkColorGetA(kHoverAndPushedColor) *
hover_animation_->GetCurrentValue();
canvas->FillRect(rect, SkColorSetA(kHoverAndPushedColor, alpha));
} else if (state() == BS_HOT || state() == BS_PUSHED) {
canvas->FillRect(rect, kHoverAndPushedColor);
} else if (selected) {
canvas->FillRect(rect, kSelectedColor);
}
}
void AppListItemView::GetAccessibleState(ui::AccessibleViewState* state) {
state->role = ui::AccessibilityTypes::ROLE_PUSHBUTTON;
state->name = UTF8ToUTF16(model_->title());
}
void AppListItemView::ShowContextMenuForView(views::View* source,
const gfx::Point& point) {
ui::MenuModel* menu_model = model_->GetContextMenuModel();
if (!menu_model)
return;
views::MenuModelAdapter menu_adapter(menu_model);
context_menu_runner_.reset(
new views::MenuRunner(new views::MenuItemView(&menu_adapter)));
menu_adapter.BuildMenu(context_menu_runner_->GetMenu());
if (context_menu_runner_->RunMenuAt(
GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
views::MenuItemView::TOPLEFT, views::MenuRunner::HAS_MNEMONICS) ==
views::MenuRunner::MENU_DELETED)
return;
}
void AppListItemView::StateChanged() {
if (state() == BS_HOT || state() == BS_PUSHED) {
apps_grid_view_->SetSelectedItem(this);
title_->SetEnabledColor(kTitleHoverColor);
} else {
apps_grid_view_->ClearSelectedItem(this);
model_->SetHighlighted(false);
title_->SetEnabledColor(kTitleColor);
}
}
bool AppListItemView::ShouldEnterPushedState(const ui::Event& event) {
// Don't enter pushed state for ET_GESTURE_TAP_DOWN so that hover gray
// background does not show up during scroll.
if (event.type() == ui::ET_GESTURE_TAP_DOWN)
return false;
return views::CustomButton::ShouldEnterPushedState(event);
}
} // namespace app_list
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