Add touchpad speed factor setting to Chrome OS touchpad settings page...

views/controls/slider/slider.cc

+// Copyright (c) 2009 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/slider/slider.h"
+
+#include <string>
+
+#include "views/controls/slider/native_slider_wrapper.h"
+#include "views/widget/widget.h"
+
+namespace views {
+
+// static
+const char Slider::kViewClassName[] = "views/Slider";
+
+/////////////////////////////////////////////////////////////////////////////
+// Slider
+
+Slider::Slider()
+    : native_wrapper_(NULL),
+      listener_(NULL),
+      style_(STYLE_HORIZONTAL) {
+  SetFocusable(true);
+}
+
+Slider::Slider(double min, double max, double step, StyleFlags style,
+    SliderListener* listener)
+    : native_wrapper_(NULL),
+      listener_(listener),
+      style_(style),
+      min_(min),
+      max_(max),
+      step_(step) {
+  SetFocusable(true);
+}
+
+Slider::~Slider() {
+}
+
+void Slider::NotifyValueChanged() {
+  if (native_wrapper_)
+    value_ = native_wrapper_->GetValue();
+  if (listener_)
+    listener_->SliderValueChanged(this);
+}
+
+void Slider::SetValue(double value) {
+  value_ = value;
+  if (native_wrapper_)
+    native_wrapper_->SetValue(value);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Slider, View overrides:
+
+void Slider::Layout() {
+  if (native_wrapper_) {
+    native_wrapper_->GetView()->SetBounds(GetLocalBounds(true));
+    native_wrapper_->GetView()->Layout();
+  }
+}
+
+gfx::Size Slider::GetPreferredSize() {
+  if (native_wrapper_)
+    return native_wrapper_->GetPreferredSize();
+  return gfx::Size();
+}
+
+bool Slider::IsFocusable() const {
+  return IsEnabled();
+}
+
+void Slider::SetEnabled(bool enabled) {
+  View::SetEnabled(enabled);
+  if (native_wrapper_)
+    native_wrapper_->UpdateEnabled();
+}
+
+void Slider::Focus() {
+  if (native_wrapper_) {
+    // Forward the focus to the wrapper if it exists.
+    native_wrapper_->SetFocus();
+  } else {
+    // If there is no wrapper, cause the RootView to be focused so that we still
+    // get keyboard messages.
+    View::Focus();
+  }
+}
+
+void Slider::ViewHierarchyChanged(bool is_add, View* parent, View* child) {
+  if (is_add && !native_wrapper_ && GetWidget()) {
+    // The native wrapper's lifetime will be managed by the view hierarchy after
+    // we call AddChildView.
+    native_wrapper_ = NativeSliderWrapper::CreateWrapper(this);
+    AddChildView(native_wrapper_->GetView());
+    native_wrapper_->UpdateEnabled();
+  }
+}
+
+std::string Slider::GetClassName() const {
+  return kViewClassName;
+}
+
+NativeSliderWrapper* Slider::CreateWrapper() {
+  NativeSliderWrapper* native_wrapper =
+      NativeSliderWrapper::CreateWrapper(this);
+
+  native_wrapper->UpdateEnabled();
+
+  return native_wrapper;
+}
+
+}  // namespace views