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/*
* Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2008 Collabora Ltd. All rights reserved.
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef Widget_h
#define Widget_h
#include "platform/PlatformExport.h"
#include "platform/geometry/FloatPoint.h"
#include "platform/geometry/IntRect.h"
#include "platform/heap/Handle.h"
#include "public/platform/WebFocusType.h"
#include "wtf/Forward.h"
namespace blink {
class CullRect;
class Event;
class GraphicsContext;
// The Widget class serves as a base class for FrameView, Scrollbar, and
// PluginView.
//
// Widgets are connected in a hierarchy, with the restriction that plugins and
// scrollbars are always leaves of the tree. Only FrameView can have children
// (and therefore the Widget class has no concept of children).
class PLATFORM_EXPORT Widget : public GarbageCollectedFinalized<Widget> {
public:
Widget();
virtual ~Widget();
int x() const { return frameRect().x(); }
int y() const { return frameRect().y(); }
int width() const { return frameRect().width(); }
int height() const { return frameRect().height(); }
IntSize size() const { return frameRect().size(); }
IntPoint location() const { return frameRect().location(); }
virtual void setFrameRect(const IntRect& frameRect) {
m_frameRect = frameRect;
}
const IntRect& frameRect() const { return m_frameRect; }
IntRect boundsRect() const { return IntRect(0, 0, width(), height()); }
void resize(int w, int h) { setFrameRect(IntRect(x(), y(), w, h)); }
void resize(const IntSize& s) { setFrameRect(IntRect(location(), s)); }
virtual void paint(GraphicsContext&, const CullRect&) const {}
void invalidate() { invalidateRect(boundsRect()); }
virtual void invalidateRect(const IntRect&) = 0;
virtual void setFocused(bool, WebFocusType) {}
virtual void show() {}
virtual void hide() {}
bool isSelfVisible() const {
return m_selfVisible;
} // Whether or not we have been explicitly marked as visible or not.
bool isParentVisible() const {
return m_parentVisible;
} // Whether or not our parent is visible.
bool isVisible() const {
return m_selfVisible && m_parentVisible;
} // Whether or not we are actually visible.
virtual void setParentVisible(bool visible) { m_parentVisible = visible; }
void setSelfVisible(bool v) { m_selfVisible = v; }
virtual bool isFrameView() const { return false; }
virtual bool isRemoteFrameView() const { return false; }
virtual bool isPluginView() const { return false; }
virtual bool isPluginContainer() const { return false; }
virtual bool isScrollbar() const { return false; }
virtual void setParent(Widget*);
Widget* parent() const { return m_parent; }
Widget* root() const;
virtual void handleEvent(Event*) {}
IntRect convertToRootFrame(const IntRect&) const;
IntRect convertFromRootFrame(const IntRect&) const;
IntPoint convertToRootFrame(const IntPoint&) const;
IntPoint convertFromRootFrame(const IntPoint&) const;
FloatPoint convertFromRootFrame(const FloatPoint&) const;
virtual void frameRectsChanged() {}
virtual void widgetGeometryMayHaveChanged() {}
virtual IntRect convertToContainingWidget(const IntRect&) const;
virtual IntRect convertFromContainingWidget(const IntRect&) const;
virtual IntPoint convertToContainingWidget(const IntPoint&) const;
virtual IntPoint convertFromContainingWidget(const IntPoint&) const;
// Virtual methods to convert points to/from child widgets
virtual IntPoint convertChildToSelf(const Widget*, const IntPoint&) const;
virtual IntPoint convertSelfToChild(const Widget*, const IntPoint&) const;
// Notifies this widget that it will no longer be receiving events.
virtual void eventListenersRemoved() {}
DECLARE_VIRTUAL_TRACE();
virtual void dispose() {}
private:
Member<Widget> m_parent;
IntRect m_frameRect;
bool m_selfVisible;
bool m_parentVisible;
};
} // namespace blink
#endif // Widget_h
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