Custom frame UI for platform apps on Windows.

chrome/browser/ui/views/extensions/shell_frame_win.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 <dwmapi.h>
+
+#include "chrome/browser/ui/views/extensions/shell_frame_win.h"
+
+ShellFrameWin::ShellFrameWin(views::Widget* delegate)
+    : views::NativeWidgetWin(delegate) {
+}
+
+views::NativeWidget* ShellFrameWin::AsNativeWidget() {
+  return this;
+}
+const views::NativeWidget* ShellFrameWin::AsNativeWidget() const {
+  return this;
+}
+
+gfx::Insets ShellFrameWin::GetClientAreaInsets() const {
+  return gfx::Insets(0,0,0,0);
+}
+
+LRESULT ShellFrameWin::OnNCCalcSize(BOOL w_param, LPARAM l_param) {
+  if (w_param) {
+    SetMsgHandled(TRUE);
+    MARGINS margins = {10,10,10,10};
+    DwmExtendFrameIntoClientArea(GetNativeView(), &margins);
+    return 0;
+  }
+  return views::NativeWidgetWin::OnNCCalcSize(w_param, l_param);
+}
+
+LRESULT ShellFrameWin::OnCreate(CREATESTRUCT* create_struct) {
+  RECT rc;
+  GetWindowRect(&rc);
+  SetWindowPos(NULL, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top,
+               SWP_FRAMECHANGED);
+  return views::NativeWidgetWin::OnCreate(create_struct);
+}
+
+LRESULT ShellFrameWin::OnNCHitTest(const CPoint& point) {
+  SetMsgHandled(true);
+  RECT rc;
+  GetWindowRect(&rc);
+  int x = point.x - rc.left;
+  int y = point.y - rc.top;
+  int width = rc.right - rc.left;
+  int height = rc.bottom - rc.top;
+  if (x <= 5) {
+    if (y <= 5) {
+      return HTTOPLEFT;
+    } else if (y >= height - 5) {
+      return HTBOTTOMLEFT;
+    } else {
+      return HTLEFT;
+    }
+  } else if (x >= width - 5) {
+    if (y <= 5) {
+      return HTTOPRIGHT;
+    } else if (y >= height - 5) {
+      return HTBOTTOMRIGHT;
+    } else {
+      return HTRIGHT;
+    }
+  } else {
+    if (y <= 5) {
+      return HTTOP;
+    } else if (y >= height - 5) {
+      return HTBOTTOM;
+    } else {
+      return HTCAPTION;
+    }
+  }
+  NOTREACHED();
+}
+
+// static
+NativeShellFrame* NativeShellFrame::CreateNativeShellFrame(
+    views::Widget* container) {
+  return new ShellFrameWin(container);
+}