[Chromoting] Add a simple Windows app that registers and starts a host.

remoting/host/setup/win/host_configurer_window.cc

+// Copyright (c) 2012 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 "remoting/host/setup/win/host_configurer_window.h"
+
+#include <atlbase.h>
+#include <atlstr.h>
+#include <atlwin.h>
+#include <windows.h>
+
+#include "base/string16.h"
+#include "remoting/host/setup/win/start_host_window.h"
+
+namespace {
+
+CAtlString LoadString(int id) {
+  CAtlString s;
+  s.LoadString(id);
+  return s;
+}
+
+}  // namespace
+
+namespace remoting {
+
+HostConfigurerWindow::HostConfigurerWindow(
+    net::URLRequestContextGetter* url_request_context_getter)
+    : url_request_context_getter_(url_request_context_getter) {
+}
+
+void HostConfigurerWindow::OnCancel(UINT code, int id, HWND control) {
+  EndDialog(IDCANCEL);
+}
+
+void HostConfigurerWindow::OnClose() {
+  EndDialog(IDCANCEL);
+}
+
+LRESULT HostConfigurerWindow::OnInitDialog(HWND wparam, LPARAM lparam) {
+  SetWindowText(LoadString(IDS_TITLE));

[alexeypa (please no reviews), 2012/10/12 17:09:35]

This is the only call to LoadString. Calling CString::LoadString directly and
checking the error code should be enough.

CString title;
if (!title.LoadString(IDS_TITLE)) {
  EndDialog(...);
  return FALSE;
}

if (!SetWindowText(title)) {
  EndDialog(...);
  return FALSE;
}

[simonmorris, 2012/10/15 16:51:42]

I've moved the code to a separate file, so it can be shared with
StartHostWindow.

+  ::EnableWindow(GetDlgItem(IDC_CHANGE_PIN), FALSE);

[alexeypa (please no reviews), 2012/10/12 17:09:35]

if (!GetDlgItem(IDC_CHANGE_PIN).EnableWindow(FALSE)) {
  EndDialog(...);
  return FALSE;
}

[simonmorris, 2012/10/15 16:51:42]

Done.

+  ::EnableWindow(GetDlgItem(IDC_STOP_HOST), FALSE);

[alexeypa (please no reviews), 2012/10/12 17:09:35]

Same as above.

[simonmorris, 2012/10/15 16:51:42]

Done.

+  PositionWindow();
+  return TRUE;
+}
+
+void HostConfigurerWindow::OnOk(UINT code, int id, HWND control) {
+  EndDialog(IDCANCEL);
+}
+
+void HostConfigurerWindow::OnStartHost(UINT code, int id, HWND control) {
+  StartHostWindow start_host_window(url_request_context_getter_);
+  start_host_window.DoModal();
+}
+
+void HostConfigurerWindow::PositionWindow() {
+  // Get the window dimensions.
+  RECT rect;
+  if (!GetWindowRect(&rect)) {
+    return;
+  }
+
+  // Position against the owner window unless it is minimized or invisible.
+  HWND owner = ::GetWindow(m_hWnd, GW_OWNER);
+  if (owner != NULL) {
+    DWORD style = ::GetWindowLong(owner, GWL_STYLE);
+    if ((style & WS_MINIMIZE) != 0 || (style & WS_VISIBLE) == 0) {
+      owner = NULL;
+    }
+  }
+
+  // Make sure that the window will not end up split by a monitor's boundary.
+  RECT area_rect;
+  if (!::SystemParametersInfo(SPI_GETWORKAREA, NULL, &area_rect, NULL)) {
+    return;
+  }
+
+  // On a multi-monitor system use the monitor where the owner window is shown.
+  RECT owner_rect = area_rect;
+  if (owner != NULL && ::GetWindowRect(owner, &owner_rect)) {
+    HMONITOR monitor = ::MonitorFromRect(&owner_rect, MONITOR_DEFAULTTONEAREST);
+    if (monitor != NULL) {
+      MONITORINFO monitor_info = {0};
+      monitor_info.cbSize = sizeof(monitor_info);
+      if (::GetMonitorInfo(monitor, &monitor_info)) {
+        area_rect = monitor_info.rcWork;
+      }
+    }
+  }
+
+  LONG width = rect.right - rect.left;
+  LONG height = rect.bottom - rect.top;
+  // Avoid the center of the owner rectangle, because the host controller will
+  // put its confirmation window there.
+  LONG x = (3 * owner_rect.left + owner_rect.right) / 4 - (width / 2);
+  LONG y = (3 * owner_rect.top + owner_rect.bottom) / 4 - (height / 2);
+
+  x = std::max(x, area_rect.left);
+  x = std::min(x, area_rect.right - width);
+  y = std::max(y, area_rect.top);
+  y = std::min(y, area_rect.bottom - width);
+
+  SetWindowPos(NULL, x, y, -1, -1, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);

[alexeypa (please no reviews), 2012/10/12 17:09:35]

nit: I think PositionWindow should return the status of SetWindowPos() call. The
caller then can decide whether failure to reposition the window is fatal or not.

[simonmorris, 2012/10/15 16:51:42]

Failure to reposition the window should never be fatal. No user prefers an
application that will not run, to an application with a sub-optimally positioned
window.

+}
+
+}  // namespace remoting