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// Copyright 2008, 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 CHROME_VIEWS_BUTTON_H_
#define CHROME_VIEWS_BUTTON_H_
#include <windows.h>
#include "chrome/views/base_button.h"
#include "skia/include/SkBitmap.h"
namespace ChromeViews {
class MouseEvent;
////////////////////////////////////////////////////////////////////////////////
//
// Button
//
// A simple button class
//
////////////////////////////////////////////////////////////////////////////////
class Button : public BaseButton {
public:
//
// Create a Button
Button();
virtual ~Button();
//
// Set the image the button should use for the provided state.
virtual void SetImage(ButtonState aState, SkBitmap* anImage);
enum HorizontalAlignment { ALIGN_LEFT = 0,
ALIGN_CENTER,
ALIGN_RIGHT, };
enum VerticalAlignment {ALIGN_TOP = 0,
ALIGN_MIDDLE,
ALIGN_BOTTOM };
void SetImageAlignment(HorizontalAlignment h_align,
VerticalAlignment v_align);
//
// Computes the minimum size given the current theme and graphics
void GetPreferredSize(CSize *result);
// Returns the MSAA default action of the current view. The string returned
// describes the default action that will occur when executing
// IAccessible::DoDefaultAction.
bool GetAccessibleDefaultAction(std::wstring* action);
// Returns the MSAA role of the current view. The role is what assistive
// technologies (ATs) use to determine what behavior to expect from a given
// control.
bool GetAccessibleRole(VARIANT* role);
// Set the tooltip text for this button.
void SetTooltipText(const std::wstring& text);
// Return the tooltip text currently used by this button.
std::wstring GetTooltipText() const;
// Overridden from View.
virtual bool GetTooltipText(int x, int y, std::wstring* tooltip);
protected:
// Overridden to render the button.
virtual void Paint(ChromeCanvas* canvas);
// Returns the image to paint. This is invoked from paint and returns a value
// from images.
virtual SkBitmap GetImageToPaint();
// Images.
SkBitmap images_[kButtonStateCount];
// Alignment State.
HorizontalAlignment h_alignment_;
VerticalAlignment v_alignment_;
// The tooltip text or empty string for none.
std::wstring tooltip_text_;
DISALLOW_EVIL_CONSTRUCTORS(Button);
};
////////////////////////////////////////////////////////////////////////////////
//
// ToggleButton
//
// A togglable button. It swaps out its graphics when toggled.
//
////////////////////////////////////////////////////////////////////////////////
class ToggleButton : public Button {
public:
ToggleButton();
virtual ~ToggleButton();
// Overridden from Button.
virtual void SetImage(ButtonState aState, SkBitmap* anImage);
// Like Button::SetImage(), but to set the graphics used for the
// "has been toggled" state. Must be called for each button state
// before the button is toggled.
void SetToggledImage(ButtonState state, SkBitmap* image);
virtual bool GetTooltipText(int x, int y, std::wstring* tooltip);
// Set the tooltip text displayed when the button is toggled.
void SetToggledTooltipText(const std::wstring& tooltip);
// Change the toggled state.
void SetToggled(bool toggled);
private:
// The parent class's images_ member is used for the current images,
// and this array is used to hold the alternative images.
// We swap between the two when toggling.
SkBitmap alternate_images_[kButtonStateCount];
bool toggled_;
// The parent class's tooltip_text_ is displayed when not toggled, and
// this one is shown when toggled.
std::wstring toggled_tooltip_text_;
DISALLOW_EVIL_CONSTRUCTORS(ToggleButton);
};
} // namespace
#endif // CHROME_VIEWS_BUTTON_H_
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