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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/views/controls/scrollbar/native_scroll_bar.h"
#include <algorithm>
#include <string>
#include "base/message_loop/message_loop.h"
#include "ui/events/event.h"
#include "ui/views/controls/scrollbar/native_scroll_bar_views.h"
#include "ui/views/controls/scrollbar/native_scroll_bar_wrapper.h"
#include "ui/views/widget/widget.h"
namespace views {
// static
const char NativeScrollBar::kViewClassName[] = "NativeScrollBar";
////////////////////////////////////////////////////////////////////////////////
// NativeScrollBar, public:
NativeScrollBar::NativeScrollBar(bool is_horizontal)
: ScrollBar(is_horizontal),
native_wrapper_(NULL) {
}
NativeScrollBar::~NativeScrollBar() {
}
// static
int NativeScrollBar::GetHorizontalScrollBarHeight(
const ui::NativeTheme* theme) {
return NativeScrollBarWrapper::GetHorizontalScrollBarHeight(theme);
}
// static
int NativeScrollBar::GetVerticalScrollBarWidth(
const ui::NativeTheme* theme) {
return NativeScrollBarWrapper::GetVerticalScrollBarWidth(theme);
}
////////////////////////////////////////////////////////////////////////////////
// NativeScrollBar, View overrides:
gfx::Size NativeScrollBar::GetPreferredSize() const {
if (native_wrapper_)
return native_wrapper_->GetView()->GetPreferredSize();
return gfx::Size();
}
void NativeScrollBar::Layout() {
if (native_wrapper_) {
native_wrapper_->GetView()->SetBounds(0, 0, width(), height());
native_wrapper_->GetView()->Layout();
}
}
void NativeScrollBar::ViewHierarchyChanged(
const ViewHierarchyChangedDetails& details) {
if (details.is_add && !native_wrapper_ && GetWidget()) {
native_wrapper_ = NativeScrollBarWrapper::CreateWrapper(this);
AddChildView(native_wrapper_->GetView());
}
}
const char* NativeScrollBar::GetClassName() const {
return kViewClassName;
}
// Overridden from View for keyboard UI.
bool NativeScrollBar::OnKeyPressed(const ui::KeyEvent& event) {
if (!native_wrapper_)
return false;
return native_wrapper_->GetView()->OnKeyPressed(event);
}
void NativeScrollBar::OnGestureEvent(ui::GestureEvent* event) {
if (!native_wrapper_)
return;
native_wrapper_->GetView()->OnGestureEvent(event);
}
bool NativeScrollBar::OnMouseWheel(const ui::MouseWheelEvent& event) {
if (!native_wrapper_)
return false;
return native_wrapper_->GetView()->OnMouseWheel(event);
}
////////////////////////////////////////////////////////////////////////////////
// NativeScrollBar, ScrollBar overrides:
void NativeScrollBar::Update(int viewport_size,
int content_size,
int current_pos) {
ScrollBar::Update(viewport_size, content_size, current_pos);
if (native_wrapper_)
native_wrapper_->Update(viewport_size, content_size, current_pos);
}
int NativeScrollBar::GetLayoutSize() const {
return IsHorizontal() ?
GetHorizontalScrollBarHeight(GetNativeTheme()) :
GetVerticalScrollBarWidth(GetNativeTheme());
}
int NativeScrollBar::GetPosition() const {
if (!native_wrapper_)
return 0;
return native_wrapper_->GetPosition();
}
} // namespace views
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