In DevicePermissionsDialogView disable Connect button if no device selected

chrome/browser/ui/views/extensions/device_permissions_dialog_view.cc

 // Copyright 2014 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 "chrome/browser/ui/views/extensions/device_permissions_dialog_view.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/api/chrome_device_permissions_prompt.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/constrained_window/constrained_window_views.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/usb/usb_device.h"
 #include "extensions/common/extension.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/models/table_model.h"
 #include "ui/base/models/table_model_observer.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/table/table_view.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/layout/layout_constants.h"
+#include "ui/views/window/dialog_client_view.h"
 
 using device::UsbDevice;
 using extensions::DevicePermissionsPrompt;
 
 class DevicePermissionsTableModel
     : public ui::TableModel,
       public DevicePermissionsPrompt::Prompt::Observer {
  public:
   explicit DevicePermissionsTableModel(
       scoped_refptr<DevicePermissionsPrompt::Prompt> prompt)
@@ skipping 72 matching lines @@
                       -1,
                       0.2f));
   table_columns.back().title = l10n_util::GetStringUTF16(
       IDS_DEVICE_PERMISSIONS_DIALOG_SERIAL_NUMBER_COLUMN);
 
   table_model_.reset(new DevicePermissionsTableModel(prompt_));
   table_view_ = new views::TableView(table_model_.get(),
                                      table_columns,
                                      views::TEXT_ONLY,
                                      !prompt_->multiple());
+  table_view_->SetObserver(this);
 
   views::View* table_parent = table_view_->CreateParentIfNecessary();
   AddChildView(table_parent);
   layout->SetFlexForView(table_parent, 1);
 }
 
 DevicePermissionsDialogView::~DevicePermissionsDialogView() {
   RemoveAllChildViews(true);
 }
 
@@ skipping 12 matching lines @@
 }
 
 base::string16 DevicePermissionsDialogView::GetDialogButtonLabel(
     ui::DialogButton button) const {
   if (button == ui::DIALOG_BUTTON_OK) {
     return l10n_util::GetStringUTF16(IDS_DEVICE_PERMISSIONS_DIALOG_SELECT);
   }
   return views::DialogDelegateView::GetDialogButtonLabel(button);
 }
 
+bool DevicePermissionsDialogView::IsDialogButtonEnabled(
+    ui::DialogButton button) const {
+  return button != ui::DIALOG_BUTTON_OK ||
+         !table_view_->selection_model().empty();
+}
+
 ui::ModalType DevicePermissionsDialogView::GetModalType() const {
   return ui::MODAL_TYPE_CHILD;
 }
 
 base::string16 DevicePermissionsDialogView::GetWindowTitle() const {
   return prompt_->GetHeading();
 }
 
 gfx::Size DevicePermissionsDialogView::GetPreferredSize() const {
   return gfx::Size(500, 250);
 }
 
+void DevicePermissionsDialogView::OnSelectionChanged() {
+  GetDialogClientView()->UpdateDialogButtons();
+}
+
 void ChromeDevicePermissionsPrompt::ShowDialogViews() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   web_modal::WebContentsModalDialogManager* manager =
       web_modal::WebContentsModalDialogManager::FromWebContents(web_contents());
   if (manager) {
     constrained_window::ShowWebModalDialogViews(
         new DevicePermissionsDialogView(prompt()), web_contents());
   } else {
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
         base::Bind(&DevicePermissionsPrompt::Prompt::Dismissed, prompt()));
   }
 }