summaryrefslogtreecommitdiffstats
path: root/views/widget/root_view_drop_target.h
diff options
context:
space:
mode:
authorben@chromium.org <ben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2009-05-08 00:34:05 +0000
committerben@chromium.org <ben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2009-05-08 00:34:05 +0000
commit2362e4fe2905ab75d3230ebc3e307ae53e2b8362 (patch)
treee6d88357a2021811e0e354f618247217be8bb3da /views/widget/root_view_drop_target.h
parentdb23ac3e713dc17509b2b15d3ee634968da45715 (diff)
downloadchromium_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.h75
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_