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// Copyright (c) 2012 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 UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_
#define UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_
#include "base/compiler_specific.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/font.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/views/controls/button/custom_button.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/controls/label.h"
#include "ui/views/native_theme_delegate.h"
namespace views {
// LabelButton is an alternative to TextButton, it's not focusable by default.
class VIEWS_EXPORT LabelButton : public CustomButton,
public NativeThemeDelegate {
public:
static const char kViewClassName[];
LabelButton(ButtonListener* listener, const string16& text);
virtual ~LabelButton();
// Get or set the image shown for the specified button state.
// GetImage returns the image for STATE_NORMAL if the state's image is empty.
virtual const gfx::ImageSkia& GetImage(ButtonState for_state);
void SetImage(ButtonState for_state, const gfx::ImageSkia& image);
// Get or set the text shown on the button.
const string16& GetText() const;
void SetText(const string16& text);
// Set the text color shown for the specified button state.
void SetTextColor(ButtonState for_state, SkColor color);
// Get or set the text's multi-line property to break on '\n', etc.
bool GetTextMultiLine() const;
void SetTextMultiLine(bool text_multi_line);
// Get or set the font used by this button.
const gfx::Font& GetFont() const;
void SetFont(const gfx::Font& font);
// Get or set the horizontal alignment used for the button; reversed in RTL.
// The optional image will lead the text, unless the button is right-aligned.
gfx::HorizontalAlignment GetHorizontalAlignment() const;
void SetHorizontalAlignment(gfx::HorizontalAlignment alignment);
// Call set_min_size(gfx::Size()) to clear the monotonically increasing size.
void set_min_size(const gfx::Size& min_size) { min_size_ = min_size; }
void set_max_size(const gfx::Size& max_size) { max_size_ = max_size; }
// Get or set the option to handle the return key; false by default.
bool is_default() const { return is_default_; }
void SetIsDefault(bool is_default);
// Get or set the button's overall style; the default is |STYLE_TEXTBUTTON|.
ButtonStyle style() const { return style_; }
void SetStyle(ButtonStyle style);
// Overridden from View:
virtual gfx::Size GetPreferredSize() OVERRIDE;
virtual void Layout() OVERRIDE;
virtual const char* GetClassName() const OVERRIDE;
protected:
Label* label() const { return label_; }
// Fill |params| with information about the button.
virtual void GetExtraParams(ui::NativeTheme::ExtraParams* params) const;
// Resets colors from the NativeTheme, explicitly set colors are unchanged.
virtual void ResetColorsFromNativeTheme();
// Updates the image view to contain the appropriate button state image.
void UpdateImage();
private:
FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, Init);
FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, Label);
FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, Image);
FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, LabelAndImage);
FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, Font);
// Overridden from CustomButton:
virtual void StateChanged() OVERRIDE;
// Overridden from View:
virtual void ChildPreferredSizeChanged(View* child) OVERRIDE;
virtual void OnNativeThemeChanged(const ui::NativeTheme* theme) OVERRIDE;
// Overridden from NativeThemeDelegate:
virtual ui::NativeTheme::Part GetThemePart() const OVERRIDE;
virtual gfx::Rect GetThemePaintRect() const OVERRIDE;
virtual ui::NativeTheme::State GetThemeState(
ui::NativeTheme::ExtraParams* params) const OVERRIDE;
virtual const gfx::Animation* GetThemeAnimation() const OVERRIDE;
virtual ui::NativeTheme::State GetBackgroundThemeState(
ui::NativeTheme::ExtraParams* params) const OVERRIDE;
virtual ui::NativeTheme::State GetForegroundThemeState(
ui::NativeTheme::ExtraParams* params) const OVERRIDE;
// The image and label shown in the button.
ImageView* image_;
Label* label_;
// The images and colors for each button state.
gfx::ImageSkia button_state_images_[STATE_COUNT];
SkColor button_state_colors_[STATE_COUNT];
// Used to track whether SetTextColor() has been invoked.
bool explicitly_set_colors_[STATE_COUNT];
// |min_size_| increases monotonically with the preferred size.
gfx::Size min_size_;
// |max_size_| may be set to clamp the preferred size.
gfx::Size max_size_;
// Flag indicating default handling of the return key via an accelerator.
// Whether or not the button appears or behaves as the default button in its
// current context;
bool is_default_;
// The button's overall style.
ButtonStyle style_;
DISALLOW_COPY_AND_ASSIGN(LabelButton);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_
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