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

views/controls/slider/native_slider_gtk.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 <gtk/gtk.h>
+
+#include "views/controls/slider/native_slider_gtk.h"
+
+#include "base/gfx/gtk_util.h"
+#include "views/controls/slider/slider.h"
+
+namespace views {
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeSliderGtk, public:
+
+NativeSliderGtk::NativeSliderGtk(Slider* slider)
+    : slider_(slider) {
+}
+
+NativeSliderGtk::~NativeSliderGtk() {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeSliderGtk, NativeSliderWrapper implementation:
+
+void NativeSliderGtk::UpdateEnabled() {
+  if (!native_view())
+    return;
+  SetEnabled(slider_->IsEnabled());
+}
+
+double NativeSliderGtk::GetValue() {
+  if (!native_view())
+    return 0;
+  return gtk_range_get_value(GTK_RANGE(native_view()));
+}
+
+void NativeSliderGtk::SetValue(double value) {
+  if (!native_view())
+    return;
+  gtk_range_set_value(GTK_RANGE(native_view()), value);
+}
+
+void NativeSliderGtk::SetFocus() {
+  Focus();
+}
+
+gfx::Size NativeSliderGtk::GetPreferredSize() {
+  if (!native_view())
+    return gfx::Size();
+
+  if (preferred_size_.IsEmpty()) {
+    GtkRequisition size_request = { 0, 0 };
+    gtk_widget_size_request(native_view(), &size_request);
+    preferred_size_.SetSize(size_request.width, size_request.height);
+  }
+  return preferred_size_;
+}
+
+View* NativeSliderGtk::GetView() {
+  return this;
+}
+
+gfx::NativeView NativeSliderGtk::GetTestingHandle() const {
+  return native_view();
+}
+
+// static
+gboolean NativeSliderGtk::OnValueChangedHandler(GtkWidget* entry,
+                                                NativeSliderGtk* slider) {
+  return slider->OnValueChanged();
+}
+
+gboolean NativeSliderGtk::OnValueChanged() {
+  slider_->NotifyValueChanged();
+  return false;
+}
+////////////////////////////////////////////////////////////////////////////////
+// NativeSliderGtk, NativeControlGtk overrides:
+
+void NativeSliderGtk::CreateNativeControl() {
+  GtkWidget* widget;
+  if (slider_->style() & Slider::STYLE_VERTICAL)
+    widget = gtk_vscale_new_with_range(slider_->min(),
+                                       slider_->max(),
+                                       slider_->step());
+  else
+    widget = gtk_hscale_new_with_range(slider_->min(),
+                                       slider_->max(),
+                                       slider_->step());
+  NativeControlCreated(widget);
+
+  bool drawvalue = slider_->style() & Slider::STYLE_DRAW_VALUE;
+  gtk_scale_set_draw_value(GTK_SCALE(native_view()), drawvalue);
+
+  int digits = 0;
+  if (slider_->style() & Slider::STYLE_ONE_DIGIT)
+    digits = 1;
+  else if (slider_->style() & Slider::STYLE_TWO_DIGITS)
+    digits = 2;
+  gtk_scale_set_digits(GTK_SCALE(native_view()), digits);
+
+  if (slider_->style() & Slider::STYLE_UPDATE_ON_RELEASE)
+    gtk_range_set_update_policy(GTK_RANGE(native_view()),
+                                GTK_UPDATE_DISCONTINUOUS);
+}
+
+void NativeSliderGtk::NativeControlCreated(GtkWidget* widget) {
+  NativeControlGtk::NativeControlCreated(widget);
+  g_signal_connect(widget, "value_changed",
+                   G_CALLBACK(OnValueChangedHandler), this);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeSliderWrapper, public:
+
+// static
+NativeSliderWrapper* NativeSliderWrapper::CreateWrapper(Slider* field) {
+  return new NativeSliderGtk(field);
+}
+
+}  // namespace views