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author | ben@chromium.org <ben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-05-08 00:34:05 +0000 |
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committer | ben@chromium.org <ben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-05-08 00:34:05 +0000 |
commit | 2362e4fe2905ab75d3230ebc3e307ae53e2b8362 (patch) | |
tree | e6d88357a2021811e0e354f618247217be8bb3da /views/widget/root_view_drop_target.h | |
parent | db23ac3e713dc17509b2b15d3ee634968da45715 (diff) | |
download | chromium_src-2362e4fe2905ab75d3230ebc3e307ae53e2b8362.zip chromium_src-2362e4fe2905ab75d3230ebc3e307ae53e2b8362.tar.gz chromium_src-2362e4fe2905ab75d3230ebc3e307ae53e2b8362.tar.bz2 |
Move src/chrome/views to src/views. RS=darin http://crbug.com/11387
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15604 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'views/widget/root_view_drop_target.h')
-rw-r--r-- | views/widget/root_view_drop_target.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/views/widget/root_view_drop_target.h b/views/widget/root_view_drop_target.h new file mode 100644 index 0000000..a3c3afd --- /dev/null +++ b/views/widget/root_view_drop_target.h @@ -0,0 +1,75 @@ +// 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. + +#ifndef VIEWS_WIDGET_ROOT_VIEW_DROP_TARGET_H_ +#define VIEWS_WIDGET_ROOT_VIEW_DROP_TARGET_H_ + +#include <atlbase.h> +#include <atlapp.h> +#include <atlmisc.h> + +#include "app/os_exchange_data.h" +#include "base/base_drop_target.h" + +namespace gfx { +class Point; +} + +namespace views { + +class RootView; +class View; + +// RootViewDropTarget takes care of managing drag and drop for the RootView and +// converts Windows OLE drop messages into Views drop messages. +// +// RootViewDropTarget is responsible for determining the appropriate View to +// use during a drag and drop session, and forwarding events to it. +class RootViewDropTarget : public BaseDropTarget { + public: + explicit RootViewDropTarget(RootView* root_view); + virtual ~RootViewDropTarget(); + + // If a drag and drop is underway and view is the current drop target, the + // drop target is set to null. + // This is invoked when a View is removed from the RootView to make sure + // we don't target a view that was removed during dnd. + void ResetTargetViewIfEquals(View* view); + + protected: + virtual DWORD OnDragOver(IDataObject* data_object, + DWORD key_state, + POINT cursor_position, + DWORD effect); + + virtual void OnDragLeave(IDataObject* data_object); + + virtual DWORD OnDrop(IDataObject* data_object, + DWORD key_state, + POINT cursor_position, + DWORD effect); + + private: + // Calculates the target view for a drop given the specified location in + // the coordinate system of the rootview. This tries to avoid continually + // querying CanDrop by returning target_view_ if the mouse is still over + // target_view_. + View* CalculateTargetView(const gfx::Point& root_view_location, + const OSExchangeData& data); + + // RootView we were created for. + RootView* root_view_; + + // View we're targeting events at. + View* target_view_; + + // The deepest view under the current drop coordinate. + View* deepest_view_; + + DISALLOW_EVIL_CONSTRUCTORS(RootViewDropTarget); +}; + +} // namespace views + +#endif // VIEWS_WIDGET_ROOT_VIEW_DROP_TARGET_H_ |