Make Combobox portable

views/controls/combobox/combobox.cc

+// 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/combobox/combobox.h"
+
+#include "views/controls/combobox/native_combobox_wrapper.h"
+
+namespace views {
+
+// static
+const char Combobox::kViewClassName[] = "views/Combobox";
+
+////////////////////////////////////////////////////////////////////////////////
+// Combobox, public:
+
+Combobox::Combobox(Model* model)
+    : native_wrapper_(NULL),
+      model_(model),
+      listener_(NULL),
+      selected_item_(0) {
+}
+
+Combobox::~Combobox() {
+}
+
+void Combobox::ModelChanged() {
+  selected_item_ = std::min(0, model_->GetItemCount(this));
+  if (native_wrapper_)
+    native_wrapper_->UpdateFromModel();
+}
+
+void Combobox::SetSelectedItem(int index) {
+  selected_item_ = index;
+  if (native_wrapper_)
+    native_wrapper_->UpdateSelectedItem();
+}
+
+void Combobox::SelectionChanged() {
+  int prev_selected_item = selected_item_;
+  selected_item_ = native_wrapper_->GetSelectedItem();
+  if (listener_)
+    listener_->ItemChanged(this, prev_selected_item, selected_item_);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Combobox, View overrides:
+
+gfx::Size Combobox::GetPreferredSize() {
+  if (native_wrapper_)
+    return native_wrapper_->GetPreferredSize();
+  return gfx::Size();
+}
+
+void Combobox::Layout() {
+  if (native_wrapper_) {
+    native_wrapper_->GetView()->SetBounds(0, 0, width(), height());
+    native_wrapper_->GetView()->Layout();
+  }
+}
+
+void Combobox::SetEnabled(bool flag) {
+  View::SetEnabled(flag);
+  if (native_wrapper_)
+    native_wrapper_->UpdateEnabled();
+}
+
+// VK_ESCAPE should be handled by this view when the drop down list is active.
+// In other words, the list should be closed instead of the dialog.
+bool Combobox::OverrideAccelerator(const Accelerator& accelerator) {
+#if defined(OS_WIN)
+  if (accelerator != Accelerator(VK_ESCAPE, false, false, false))
+    return false;
+#else
+  NOTIMPLEMENTED();
+  // TODO(port): figure out VK_keys
+#endif
+  return native_wrapper_ && native_wrapper_->IsDropdownOpen();
+}
+
+void Combobox::Focus() {
+  // Forward the focus to the wrapper.
+  if (native_wrapper_)
+    native_wrapper_->SetFocus();
+  else
+    View::Focus();  // Will focus the RootView window (so we still get
+                    // keyboard messages).
+}
+
+void Combobox::ViewHierarchyChanged(bool is_add, View* parent,
+                                    View* child) {
+  if (is_add && !native_wrapper_ && GetWidget()) {
+    native_wrapper_ = NativeComboboxWrapper::CreateWrapper(this);
+    native_wrapper_->UpdateFromModel();
+    native_wrapper_->UpdateEnabled();
+    AddChildView(native_wrapper_->GetView());
+  }
+}
+
+std::string Combobox::GetClassName() const {
+  return kViewClassName;
+}
+
+}  // namespace views