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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.
#include "ui/views/controls/button/label_button_border.h"
#include "base/logging.h"
#include "grit/ui_resources.h"
#include "ui/base/animation/animation.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/sys_color_change_listener.h"
#include "ui/native_theme/native_theme.h"
#include "ui/views/controls/button/label_button.h"
#include "ui/views/native_theme_delegate.h"
namespace views {
namespace {
// Insets for the unified button images. This assumes that the images
// are of a 9 grid, of 5x5 size each.
const int kButtonInsets = 5;
// The text-button hot and pushed image IDs; normal is unadorned by default.
const int kTextHoveredImages[] = IMAGE_GRID(IDR_TEXTBUTTON_HOVER);
const int kTextPressedImages[] = IMAGE_GRID(IDR_TEXTBUTTON_PRESSED);
Button::ButtonState GetButtonState(ui::NativeTheme::State state) {
switch (state) {
case ui::NativeTheme::kDisabled: return Button::STATE_DISABLED;
case ui::NativeTheme::kHovered: return Button::STATE_HOVERED;
case ui::NativeTheme::kNormal: return Button::STATE_NORMAL;
case ui::NativeTheme::kPressed: return Button::STATE_PRESSED;
case ui::NativeTheme::kMaxState: NOTREACHED() << "Unknown state: " << state;
}
return Button::STATE_NORMAL;
}
// A helper function to paint the native theme or images as appropriate.
void PaintHelper(LabelButtonBorder* border,
gfx::Canvas* canvas,
const ui::NativeTheme* theme,
ui::NativeTheme::Part part,
ui::NativeTheme::State state,
const gfx::Rect& rect,
const ui::NativeTheme::ExtraParams& extra) {
if (border->style() == Button::STYLE_NATIVE_TEXTBUTTON) {
theme->Paint(canvas->sk_canvas(), part, state, rect, extra);
} else {
Painter* painter =
border->GetPainter(extra.button.is_focused, GetButtonState(state));
// Paint any corresponding unfocused painter if there is no focused painter.
if (!painter && extra.button.is_focused)
painter = border->GetPainter(false, GetButtonState(state));
if (painter)
painter->Paint(canvas, rect.size());
}
}
} // namespace
LabelButtonBorder::LabelButtonBorder(Button::ButtonStyle style)
: style_(style) {
ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
const gfx::Insets insets(kButtonInsets,
kButtonInsets,
kButtonInsets,
kButtonInsets);
if (style == Button::STYLE_BUTTON) {
set_insets(gfx::Insets(8, 13, 8, 13));
SetPainter(false, Button::STATE_NORMAL,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_NORMAL), insets));
SetPainter(false, Button::STATE_HOVERED,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_HOVER), insets));
SetPainter(false, Button::STATE_PRESSED,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_PRESSED), insets));
SetPainter(false, Button::STATE_DISABLED,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_DISABLED), insets));
SetPainter(true, Button::STATE_NORMAL,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_FOCUSED_NORMAL), insets));
SetPainter(true, Button::STATE_HOVERED,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_FOCUSED_HOVER), insets));
SetPainter(true, Button::STATE_PRESSED,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_FOCUSED_PRESSED), insets));
SetPainter(true, Button::STATE_DISABLED,
Painter::CreateImagePainter(
*rb.GetImageSkiaNamed(IDR_BUTTON_DISABLED), insets));
} else if (style == Button::STYLE_TEXTBUTTON) {
set_insets(gfx::Insets(5, 6, 5, 6));
SetPainter(false, Button::STATE_HOVERED,
Painter::CreateImageGridPainter(kTextHoveredImages));
SetPainter(false, Button::STATE_PRESSED,
Painter::CreateImageGridPainter(kTextPressedImages));
} else if (style == Button::STYLE_NATIVE_TEXTBUTTON) {
set_insets(gfx::Insets(5, 12, 5, 12));
}
}
LabelButtonBorder::~LabelButtonBorder() {}
void LabelButtonBorder::Paint(const View& view, gfx::Canvas* canvas) {
const NativeThemeDelegate* native_theme_delegate =
static_cast<const LabelButton*>(&view);
ui::NativeTheme::Part part = native_theme_delegate->GetThemePart();
gfx::Rect rect(native_theme_delegate->GetThemePaintRect());
ui::NativeTheme::ExtraParams extra;
const ui::NativeTheme* theme = view.GetNativeTheme();
const ui::Animation* animation = native_theme_delegate->GetThemeAnimation();
ui::NativeTheme::State state = native_theme_delegate->GetThemeState(&extra);
if (animation && animation->is_animating()) {
// Composite the background and foreground painters during state animations.
int alpha = animation->CurrentValueBetween(0, 0xff);
state = native_theme_delegate->GetBackgroundThemeState(&extra);
canvas->SaveLayerAlpha(static_cast<uint8>(0xff - alpha));
PaintHelper(this, canvas, theme, part, state, rect, extra);
canvas->Restore();
state = native_theme_delegate->GetForegroundThemeState(&extra);
canvas->SaveLayerAlpha(static_cast<uint8>(alpha));
PaintHelper(this, canvas, theme, part, state, rect, extra);
canvas->Restore();
} else {
PaintHelper(this, canvas, theme, part, state, rect, extra);
}
// For inverted color schemes, draw a solid fill with the button color.
if (gfx::IsInvertedColorScheme()) {
rect.Inset(insets_);
canvas->FillRect(rect, extra.button.background_color);
}
// Draw the Views focus border for the native theme style.
if (style() == Button::STYLE_NATIVE_TEXTBUTTON &&
view.focus_border() && extra.button.is_focused)
view.focus_border()->Paint(view, canvas);
}
gfx::Insets LabelButtonBorder::GetInsets() const {
return insets_;
}
Painter* LabelButtonBorder::GetPainter(bool focused,
Button::ButtonState state) {
return painters_[focused ? 1 : 0][state].get();
}
void LabelButtonBorder::SetPainter(bool focused,
Button::ButtonState state,
Painter* painter) {
painters_[focused ? 1 : 0][state].reset(painter);
}
} // namespace views
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