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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/examples/throbber_example.h"
#include <memory>
#include "base/memory/raw_ptr.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/views/controls/throbber.h"
#include "ui/views/examples/grit/views_examples_resources.h"
#include "ui/views/layout/box_layout.h"
#include "ui/views/layout/delegating_layout_manager.h"
#include "ui/views/view.h"
namespace views::examples {
namespace {
class ThrobberView : public View, public LayoutDelegate {
METADATA_HEADER(ThrobberView, View)
public:
explicit ThrobberView(std::optional<int> diameter = std::nullopt) {
throbber_ = diameter
? AddChildView(std::make_unique<Throbber>(diameter.value()))
: AddChildView(std::make_unique<Throbber>());
throbber_->Start();
SetLayoutManager(std::make_unique<DelegatingLayoutManager>(this));
}
ThrobberView(const ThrobberView&) = delete;
ThrobberView& operator=(const ThrobberView&) = delete;
// View::
gfx::Size CalculatePreferredSize(
const SizeBounds& available_size) const override {
return gfx::Size(available_size.width().value_or(width()),
available_size.height().value_or(height()));
}
// Overridden from LayoutDelegate:
ProposedLayout CalculateProposedLayout(
const SizeBounds& size_bounds) const override {
ProposedLayout layout;
if (!size_bounds.is_fully_bounded()) {
layout.host_size = GetPreferredSize();
} else {
layout.host_size =
gfx::Size(size_bounds.width().value(), size_bounds.height().value());
}
const int diameter = throbber_->GetDiameter();
layout.child_layouts.emplace_back(
throbber_.get(), throbber_->GetVisible(),
gfx::Rect((layout.host_size.width() - diameter) / 2,
(layout.host_size.height() - diameter) / 2, diameter,
diameter));
return layout;
}
bool OnMousePressed(const ui::MouseEvent& event) override {
if (GetEventHandlerForPoint(event.location()) != throbber_) {
return false;
}
if (is_checked_) {
throbber_->Start();
} else {
throbber_->Stop();
}
throbber_->SetChecked(!is_checked_);
is_checked_ = !is_checked_;
return true;
}
private:
raw_ptr<Throbber> throbber_;
bool is_checked_ = false;
};
BEGIN_METADATA(ThrobberView)
END_METADATA
} // namespace
ThrobberExample::ThrobberExample()
: ExampleBase(l10n_util::GetStringUTF8(IDS_THROBBER_SELECT_LABEL).c_str()) {
}
ThrobberExample::~ThrobberExample() = default;
void ThrobberExample::CreateExampleView(View* container) {
auto* layout = container->SetLayoutManager(std::make_unique<BoxLayout>());
layout->SetDefaultFlex(1);
container->AddChildView(std::make_unique<ThrobberView>());
container->AddChildView(std::make_unique<ThrobberView>(/*diameter=*/50));
}
} // namespace views::examples
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