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// Copyright (c) 2006-2008 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 "views/controls/scrollbar/native_scroll_bar.h"
#include <algorithm>
#include <string>
#include "base/message_loop.h"
#include "views/controls/scrollbar/native_scroll_bar_wrapper.h"
#include "views/widget/widget.h"
namespace views {
// static
const char NativeScrollBar::kViewClassName[] = "views/NativeScrollBar";
////////////////////////////////////////////////////////////////////////////////
// NativeScrollBar, public:
NativeScrollBar::NativeScrollBar(bool is_horizontal)
: ScrollBar(is_horizontal),
native_wrapper_(NULL) {
}
NativeScrollBar::~NativeScrollBar() {
}
// static
int NativeScrollBar::GetHorizontalScrollBarHeight() {
return NativeScrollBarWrapper::GetHorizontalScrollBarHeight();
}
// static
int NativeScrollBar::GetVerticalScrollBarWidth() {
return NativeScrollBarWrapper::GetVerticalScrollBarWidth();
}
////////////////////////////////////////////////////////////////////////////////
// NativeScrollBar, View overrides:
gfx::Size NativeScrollBar::GetPreferredSize() {
if (native_wrapper_)
return native_wrapper_->GetView()->GetPreferredSize();
return gfx::Size();
}
void NativeScrollBar::Layout() {
if (native_wrapper_)
native_wrapper_->GetView()->Layout();
}
void NativeScrollBar::ViewHierarchyChanged(bool is_add, View *parent,
View *child) {
Widget* widget;
if (is_add && !native_wrapper_ && (widget = GetWidget())) {
native_wrapper_ = NativeScrollBarWrapper::CreateWrapper(this);
AddChildView(native_wrapper_->GetView());
}
}
std::string NativeScrollBar::GetClassName() const {
return kViewClassName;
}
// Overridden from View for keyboard UI.
bool NativeScrollBar::OnKeyPressed(const KeyEvent& event) {
if (!native_wrapper_)
return false;
return native_wrapper_->GetView()->OnKeyPressed(event);
}
bool NativeScrollBar::OnMouseWheel(const 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() : GetVerticalScrollBarWidth();
}
int NativeScrollBar::GetPosition() const {
if (!native_wrapper_)
return 0;
return native_wrapper_->GetPosition();
}
} // namespace views
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