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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/contents_view.h"
#include <algorithm>
#include "ui/app_list/app_list_view.h"
#include "ui/app_list/apps_grid_view.h"
#include "ui/app_list/pagination_model.h"
#include "ui/app_list/search_result_list_view.h"
#include "ui/base/events/event.h"
#include "ui/views/animation/bounds_animator.h"
#include "ui/views/view_model.h"
#include "ui/views/view_model_utils.h"
namespace app_list {
namespace {
const int kPreferredIconDimension = 48;
const int kPreferredCols = 4;
const int kPreferredRows = 4;
// Indexes of interesting views in ViewModel of ContentsView.
const int kIndexAppsGrid = 0;
const int kIndexSearchResults = 1;
const int kMinMouseWheelToSwitchPage = 20;
const int kMinScrollToSwitchPage = 20;
const int kMinHorizVelocityToSwitchPage = 800;
const double kFinishTransitionThreshold = 0.33;
const int kTransitionAnimationDurationInMs = 180;
// Helpers to get certain child view from |model|.
AppsGridView* GetAppsGridView(views::ViewModel* model) {
return static_cast<AppsGridView*>(model->view_at(kIndexAppsGrid));
}
SearchResultListView* GetSearchResultListView(views::ViewModel* model) {
return static_cast<SearchResultListView*>(
model->view_at(kIndexSearchResults));
}
} // namespace
ContentsView::ContentsView(AppListView* app_list_view,
PaginationModel* pagination_model)
: show_state_(SHOW_APPS),
pagination_model_(pagination_model),
view_model_(new views::ViewModel),
ALLOW_THIS_IN_INITIALIZER_LIST(
bounds_animator_(new views::BoundsAnimator(this))) {
pagination_model_->SetTransitionDuration(kTransitionAnimationDurationInMs);
AppsGridView* apps_grid_view = new AppsGridView(app_list_view,
pagination_model);
apps_grid_view->SetLayout(kPreferredIconDimension,
kPreferredCols,
kPreferredRows);
AddChildView(apps_grid_view);
view_model_->Add(apps_grid_view, kIndexAppsGrid);
SearchResultListView* search_results_view = new SearchResultListView(
app_list_view);
AddChildView(search_results_view);
view_model_->Add(search_results_view, kIndexSearchResults);
}
ContentsView::~ContentsView() {
}
void ContentsView::SetModel(AppListModel* model) {
if (model) {
GetAppsGridView(view_model_.get())->SetModel(model->apps());
GetSearchResultListView(view_model_.get())->SetResults(model->results());
} else {
GetAppsGridView(view_model_.get())->SetModel(NULL);
GetSearchResultListView(view_model_.get())->SetResults(NULL);
}
}
void ContentsView::SetShowState(ShowState show_state) {
if (show_state_ == show_state)
return;
show_state_ = show_state;
ShowStateChanged();
}
void ContentsView::ShowStateChanged() {
if (show_state_ == SHOW_SEARCH_RESULTS) {
// TODO(xiyuan): Highlight default match instead of the first.
SearchResultListView* results_view =
GetSearchResultListView(view_model_.get());
if (results_view->visible())
results_view->SetSelectedIndex(0);
}
AnimateToIdealBounds();
}
void ContentsView::CalculateIdealBounds() {
gfx::Rect rect(GetContentsBounds());
if (rect.IsEmpty())
return;
gfx::Rect grid_frame(rect);
gfx::Rect results_frame(rect);
// Offsets apps grid and result list based on |show_state_|.
// SearchResultListView is on top of apps grid. Visible view is left in
// visible area and invisible ones is put out of the visible area.
int contents_area_height = rect.height();
switch (show_state_) {
case SHOW_APPS:
results_frame.Offset(0, -contents_area_height);
break;
case SHOW_SEARCH_RESULTS:
grid_frame.Offset(0, contents_area_height);
break;
default:
NOTREACHED() << "Unknown show_state_ " << show_state_;
break;
}
view_model_->set_ideal_bounds(kIndexAppsGrid, grid_frame);
view_model_->set_ideal_bounds(kIndexSearchResults, results_frame);
}
void ContentsView::AnimateToIdealBounds() {
CalculateIdealBounds();
for (int i = 0; i < view_model_->view_size(); ++i) {
bounds_animator_->AnimateViewTo(view_model_->view_at(i),
view_model_->ideal_bounds(i));
}
}
void ContentsView::ShowSearchResults(bool show) {
SetShowState(show ? SHOW_SEARCH_RESULTS : SHOW_APPS);
}
gfx::Size ContentsView::GetPreferredSize() {
const gfx::Size grid_size =
GetAppsGridView(view_model_.get())->GetPreferredSize();
const gfx::Size results_size =
GetSearchResultListView(view_model_.get())->GetPreferredSize();
int width = std::max(grid_size.width(), results_size.width());
int height = std::max(grid_size.height(), results_size.height());
return gfx::Size(width, height);
}
void ContentsView::Layout() {
CalculateIdealBounds();
views::ViewModelUtils::SetViewBoundsToIdealBounds(*view_model_);
}
ui::EventResult ContentsView::OnGestureEvent(
const ui::GestureEvent& event) {
if (show_state_ != SHOW_APPS)
return ui::ER_UNHANDLED;
switch (event.type()) {
case ui::ET_GESTURE_SCROLL_BEGIN:
pagination_model_->StartScroll();
return ui::ER_CONSUMED;
case ui::ET_GESTURE_SCROLL_UPDATE:
// event.details.scroll_x() > 0 means moving contents to right. That is,
// transitioning to previous page.
pagination_model_->UpdateScroll(
event.details().scroll_x() / GetContentsBounds().width());
return ui::ER_CONSUMED;
case ui::ET_GESTURE_SCROLL_END:
pagination_model_->EndScroll(pagination_model_->
transition().progress < kFinishTransitionThreshold);
return ui::ER_CONSUMED;
case ui::ET_SCROLL_FLING_START: {
pagination_model_->EndScroll(true);
if (fabs(event.details().velocity_x()) > kMinHorizVelocityToSwitchPage) {
pagination_model_->SelectPageRelative(
event.details().velocity_x() < 0 ? 1 : -1,
true);
}
return ui::ER_CONSUMED;
}
default:
break;
}
return ui::ER_UNHANDLED;
}
bool ContentsView::OnKeyPressed(const ui::KeyEvent& event) {
switch (show_state_) {
case SHOW_APPS:
return GetAppsGridView(view_model_.get())->OnKeyPressed(event);
case SHOW_SEARCH_RESULTS:
return GetSearchResultListView(view_model_.get())->OnKeyPressed(event);
default:
NOTREACHED() << "Unknown show state " << show_state_;
}
return false;
}
bool ContentsView::OnMouseWheel(const ui::MouseWheelEvent& event) {
if (show_state_ != SHOW_APPS)
return false;
if (abs(event.offset()) > kMinMouseWheelToSwitchPage) {
if (!pagination_model_->has_transition())
pagination_model_->SelectPageRelative(event.offset() > 0 ? -1 : 1, true);
return true;
}
return false;
}
bool ContentsView::OnScrollEvent(const ui::ScrollEvent& event) {
if (show_state_ != SHOW_APPS)
return false;
if (abs(event.x_offset()) > kMinScrollToSwitchPage) {
if (!pagination_model_->has_transition()) {
pagination_model_->SelectPageRelative(event.x_offset() > 0 ? -1 : 1,
true);
}
return true;
}
return false;
}
} // namespace app_list
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