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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.
*/
// WebThemeControlDRTWin implements the generic rendering of controls
// needed by WebThemeEngineDRTWin. See the comments in that class
// header file for why this class is needed and used.
//
// This class implements a generic set of widgets using Skia. The widgets
// are optimized for testability, not a pleasing appearance.
//
#ifndef WebThemeControlDRTWin_h
#define WebThemeControlDRTWin_h
#include "skia/ext/platform_canvas.h"
#include "third_party/skia/include/core/SkColor.h"
#include <wtf/Noncopyable.h>
// Skia forward declarations
struct SkIRect;
class WebThemeControlDRTWin : public Noncopyable {
public:
// This list of states mostly mirrors the list in WebCore/platform/ThemeTypes.h
// but is maintained separately since that isn't public and also to minimize
// dependencies.
// Note that the WebKit ThemeTypes seem to imply that a control can be
// in multiple states simultaneously but WebThemeEngine only allows for
// a single state at a time.
//
// Some definitions for the various states:
// Disabled - indicates that a control can't be modified or selected
// (corresponds to HTML 'disabled' attribute)
// ReadOnly - indicates that a control can't be modified but can be
// selected
// Normal - the normal state of control on the page when it isn't
// focused or otherwise active
// Hot - when the mouse is hovering over a part of the control,
// all the other parts are considered "hot"
// Hover - when the mouse is directly over a control (the CSS
// :hover pseudo-class)
// Focused - when the control has the keyboard focus
// Pressed - when the control is being triggered (by a mousedown or
// a key event).
// Indeterminate - when set to indeterminate (only for progress bar)
enum State {
UnknownState = 0,
DisabledState,
ReadOnlyState,
NormalState,
HotState,
HoverState,
FocusedState,
PressedState,
IndeterminateState
};
// This list of types mostly mirrors the list in
// WebCore/platform/ThemeTypes.h but is maintained
// separately since that isn't public and also to minimize dependencies.
//
// Note that what the user might think of as a single control can be
// made up of multiple parts. For example, a single scroll bar contains
// six clickable parts - two arrows, the "thumb" indicating the current
// position on the bar, the other two parts of the bar (before and after
// the thumb) and the "gripper" on the thumb itself.
//
enum Type {
UnknownType = 0,
TextFieldType,
PushButtonType,
UncheckedBoxType,
CheckedBoxType,
IndeterminateCheckboxType,
UncheckedRadioType,
CheckedRadioType,
HorizontalScrollTrackBackType,
HorizontalScrollTrackForwardType,
HorizontalScrollThumbType,
HorizontalScrollGripType,
VerticalScrollTrackBackType,
VerticalScrollTrackForwardType,
VerticalScrollThumbType,
VerticalScrollGripType,
LeftArrowType,
RightArrowType,
UpArrowType,
DownArrowType,
HorizontalSliderTrackType,
HorizontalSliderThumbType,
DropDownButtonType,
ProgressBarType
};
// canvas is the canvas to draw onto, and rect gives the size of the
// control. ctype and cstate specify the type and state of the control.
WebThemeControlDRTWin(skia::PlatformCanvas* canvas,
const SkIRect& rect,
Type ctype,
State cstate);
~WebThemeControlDRTWin();
// Draws the control.
void draw();
// Use this for TextField controls instead, because the logic
// for drawing them is dependent on what WebKit tells us to do.
// If drawEdges is true, draw an edge around the control. If
// fillContentArea is true, fill the content area with the given color.
void drawTextField(bool drawEdges, bool fillContentArea, SkColor color);
// Use this for drawing ProgressBar controls instead, since we
// need to know the rect to fill inside the bar.
void drawProgressBar(const SkIRect& fillRect);
private:
// Draws a box of size specified by irect, filled with the given color.
// The box will have a border drawn in the default edge color.
void box(const SkIRect& irect, SkColor color);
// Draws a triangle of size specified by the three pairs of coordinates,
// filled with the given color. The box will have an edge drawn in the
// default edge color.
void triangle(int x0, int y0, int x1, int y1, int x2, int y2, SkColor color);
// Draws a rectangle the size of the control with rounded corners, filled
// with the specified color (and with a border in the default edge color).
void roundRect(SkColor color);
// Draws an oval the size of the control, filled with the specified color
// and with a border in the default edge color.
void oval(SkColor color);
// Draws a circle centered in the control with the specified radius,
// filled with the specified color, and with a border draw in the
// default edge color.
void circle(SkScalar radius, SkColor color);
// Draws a box the size of the control, filled with the outerColor and
// with a border in the default edge color, and then draws another box
// indented on all four sides by the specified amounts, filled with the
// inner color and with a border in the default edge color.
void nestedBoxes(int indentLeft,
int indentTop,
int indentRight,
int indentBottom,
SkColor outerColor,
SkColor innerColor);
// Draws a line between the two points in the given color.
void line(int x0, int y0, int x1, int y1, SkColor color);
// Draws a distinctive mark on the control for each state, so that the
// state of the control can be determined without needing to know which
// color is which.
void markState();
skia::PlatformCanvas* m_canvas;
const SkIRect m_irect;
const Type m_type;
const State m_state;
const SkColor m_edgeColor;
const SkColor m_bgColor;
const SkColor m_fgColor;
// The following are convenience accessors for m_irect.
const int m_left;
const int m_right;
const int m_top;
const int m_bottom;
const int m_width;
const int m_height;
};
#endif // WebThemeControlDRTWin_h
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