aura: Add an EasyResizeWindowTargeter.

Add EasyResizeWindowTargeter to allow easily resizing windows with mouse/touch
with the new event-dispatch code. This will eventually allow getting rid of
Window::SetHitTestBoundsOverrideOuter() once the new event-dispatch code is used
for all event types. This patch installs an EasyResizeWindowTargeter for the
shelf and status-area widgets. Subsequent CLs will install such targeters for the
toplevel windows too.

Collateral change includes adding some dependencies on wm_public (in DEPS and gyp).

BUG=318879
R=ben@chromium.org

Review URL: https://codereview.chromium.org/118553004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243177 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 48 insertions, 0 deletions

diff --git a/ui/wm/public/easy_resize_window_targeter.h b/ui/wm/public/easy_resize_window_targeter.h
new file mode 100644
index 0000000..c4c7137
--- /dev/null
+++ b/ui/wm/public/easy_resize_window_targeter.h
@@ -0,0 +1,48 @@
+// 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.
+
+#ifndef UI_WM_PUBLIC_EASY_RESIZE_WINDOW_TARGETER_H_
+#define UI_WM_PUBLIC_EASY_RESIZE_WINDOW_TARGETER_H_
+
+#include "ui/aura/window_targeter.h"
+#include "ui/gfx/geometry/insets.h"
+
+namespace wm {
+
+// An EventTargeter for a container window that uses a slightly larger
+// hit-target region for easier resize.
+class EasyResizeWindowTargeter : public aura::WindowTargeter {
+ public:
+  // |container| window is the owner of this targeter.
+  EasyResizeWindowTargeter(aura::Window* container,
+                           const gfx::Insets& mouse_extend,
+                           const gfx::Insets& touch_extend);
+
+  virtual ~EasyResizeWindowTargeter();
+
+ protected:
+  void set_mouse_extend(const gfx::Insets& mouse_extend) {
+    mouse_extend_ = mouse_extend;
+  }
+
+  void set_touch_extend(const gfx::Insets& touch_extend) {
+    touch_extend_ = touch_extend;
+  }
+
+  // aura::WindowTargeter:
+  virtual bool EventLocationInsideBounds(
+      aura::Window* window,
+      const ui::LocatedEvent& event) const OVERRIDE;
+
+ private:
+  aura::Window* container_;
+  gfx::Insets mouse_extend_;
+  gfx::Insets touch_extend_;
+
+  DISALLOW_COPY_AND_ASSIGN(EasyResizeWindowTargeter);
+};
+
+}  // namespace wm
+
+#endif  // UI_WM_PUBLIC_EASY_RESIZE_WINDOW_TARGETER_H_