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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 "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/effects/SkLerpXfermode.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/animation/animation.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/skia_util.h"
#include "ui/gfx/sys_color_change_listener.h"
#include "ui/native_theme/native_theme.h"
#include "ui/resources/grit/ui_resources.h"
#include "ui/views/border.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);
// A helper function to paint the appropriate broder images.
void PaintHelper(LabelButtonBorder* border,
gfx::Canvas* canvas,
ui::NativeTheme::State state,
const gfx::Rect& rect,
const ui::NativeTheme::ExtraParams& extra) {
Painter* painter =
border->GetPainter(extra.button.is_focused,
Button::GetButtonStateFrom(state));
// Paint any corresponding unfocused painter if there is no focused painter.
if (!painter && extra.button.is_focused)
painter = border->GetPainter(false, Button::GetButtonStateFrom(state));
if (painter)
Painter::PaintPainterAt(canvas, painter, rect);
}
} // namespace
LabelButtonBorder::LabelButtonBorder(Button::ButtonStyle style)
: style_(style) {
ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
const gfx::Insets insets(kButtonInsets,
kButtonInsets,
kButtonInsets,
kButtonInsets);
set_insets(GetDefaultInsetsForStyle(style_));
if (style == Button::STYLE_BUTTON) {
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) {
SetPainter(false, Button::STATE_HOVERED,
Painter::CreateImageGridPainter(kTextHoveredImages));
SetPainter(false, Button::STATE_PRESSED,
Painter::CreateImageGridPainter(kTextPressedImages));
}
}
LabelButtonBorder::~LabelButtonBorder() {}
// static
gfx::Insets LabelButtonBorder::GetDefaultInsetsForStyle(
Button::ButtonStyle style) {
gfx::Insets insets;
if (style == Button::STYLE_BUTTON) {
insets = gfx::Insets(8, 13, 8, 13);
} else if (style == Button::STYLE_TEXTBUTTON) {
insets = gfx::Insets(5, 6, 5, 6);
} else {
NOTREACHED();
}
return insets;
}
void LabelButtonBorder::Paint(const View& view, gfx::Canvas* canvas) {
const NativeThemeDelegate* native_theme_delegate =
static_cast<const LabelButton*>(&view);
gfx::Rect rect(native_theme_delegate->GetThemePaintRect());
ui::NativeTheme::ExtraParams extra;
const gfx::Animation* animation = native_theme_delegate->GetThemeAnimation();
ui::NativeTheme::State state = native_theme_delegate->GetThemeState(&extra);
if (animation && animation->is_animating()) {
// Linearly interpolate background and foreground painters during animation.
const SkRect sk_rect = gfx::RectToSkRect(rect);
canvas->sk_canvas()->saveLayer(&sk_rect, NULL);
state = native_theme_delegate->GetBackgroundThemeState(&extra);
PaintHelper(this, canvas, state, rect, extra);
SkPaint paint;
skia::RefPtr<SkXfermode> sk_lerp_xfer =
skia::AdoptRef(SkLerpXfermode::Create(animation->GetCurrentValue()));
paint.setXfermode(sk_lerp_xfer.get());
canvas->sk_canvas()->saveLayer(&sk_rect, &paint);
state = native_theme_delegate->GetForegroundThemeState(&extra);
PaintHelper(this, canvas, state, rect, extra);
canvas->sk_canvas()->restore();
canvas->sk_canvas()->restore();
} else {
PaintHelper(this, canvas, state, rect, extra);
}
}
gfx::Insets LabelButtonBorder::GetInsets() const {
return insets_;
}
gfx::Size LabelButtonBorder::GetMinimumSize() const {
gfx::Size minimum_size;
for (int i = 0; i < 2; ++i) {
for (int j = 0; j < Button::STATE_COUNT; ++j) {
if (painters_[i][j])
minimum_size.SetToMax(painters_[i][j]->GetMinimumSize());
}
}
return minimum_size;
}
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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