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/*
* Copyright (C) 2010 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 WebThemeEngine_h
#define WebThemeEngine_h
#include "../WebCanvas.h"
#include "../WebColor.h"
#include "../WebSize.h"
namespace WebKit {
struct WebRect;
class WebThemeEngine {
public:
// The UI part which is being accessed.
enum Part {
// ScrollbarTheme parts
PartScrollbarDownArrow,
PartScrollbarLeftArrow,
PartScrollbarRightArrow,
PartScrollbarUpArrow,
PartScrollbarHorizontalThumb,
PartScrollbarVerticalThumb,
PartScrollbarHorizontalTrack,
PartScrollbarVerticalTrack,
// RenderTheme parts
PartCheckbox,
PartRadio,
PartButton,
PartTextField,
PartMenuList,
PartSliderTrack,
PartSliderThumb,
PartInnerSpinButton,
PartProgressBar
};
// The current state of the associated Part.
enum State {
StateDisabled,
StateHover,
StateNormal,
StatePressed,
};
// Extra parameters for drawing the PartScrollbarHorizontalTrack and
// PartScrollbarVerticalTrack.
struct ScrollbarTrackExtraParams {
// The bounds of the entire track, as opposed to the part being painted.
int trackX;
int trackY;
int trackWidth;
int trackHeight;
};
// Extra parameters for PartCheckbox, PartPushButton and PartRadio.
struct ButtonExtraParams {
bool checked;
bool indeterminate; // Whether the button state is indeterminate.
bool isDefault; // Whether the button is default button.
bool hasBorder;
WebColor backgroundColor;
};
// Extra parameters for PartTextField
struct TextFieldExtraParams {
bool isTextArea;
bool isListbox;
WebColor backgroundColor;
};
// Extra parameters for PartMenuList
struct MenuListExtraParams {
bool hasBorder;
bool hasBorderRadius;
int arrowX;
int arrowY;
WebColor backgroundColor;
};
// Extra parameters for PartSliderTrack and PartSliderThumb
struct SliderExtraParams {
bool vertical;
bool inDrag;
};
// Extra parameters for PartInnerSpinButton
struct InnerSpinButtonExtraParams {
bool spinUp;
bool readOnly;
};
// Extra parameters for PartProgressBar
struct ProgressBarExtraParams {
bool determinate;
int valueRectX;
int valueRectY;
int valueRectWidth;
int valueRectHeight;
};
union ExtraParams {
ScrollbarTrackExtraParams scrollbarTrack;
ButtonExtraParams button;
TextFieldExtraParams textField;
MenuListExtraParams menuList;
SliderExtraParams slider;
InnerSpinButtonExtraParams innerSpin;
ProgressBarExtraParams progressBar;
};
// Gets the size of the given theme part. For variable sized items
// like vertical scrollbar thumbs, the width will be the required width of
// the track while the height will be the minimum height.
virtual WebSize getSize(Part) { return WebSize(); }
// Paint the given the given theme part.
virtual void paint(
WebCanvas*, Part, State, const WebRect&, const ExtraParams*) {}
};
} // namespace WebKit
#endif
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