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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 "ui/base/animation/animation.h"
#include "ui/base/native_theme/native_theme.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/rect.h"
#include "ui/views/controls/button/label_button.h"
#include "ui/views/native_theme_delegate.h"
namespace views {
namespace {
// Preferred padding between content and edge.
static const int kPreferredPaddingHorizontal = 6;
static const int kPreferredPaddingVertical = 5;
// Preferred padding between content and edge for NativeTheme border.
static const int kPreferredNativeThemePaddingHorizontal = 12;
static const int kPreferredNativeThemePaddingVertical = 5;
views::CustomButton::ButtonState GetButtonState(ui::NativeTheme::State state) {
switch(state) {
case ui::NativeTheme::kDisabled: return views::CustomButton::STATE_DISABLED;
case ui::NativeTheme::kHovered: return views::CustomButton::STATE_HOVERED;
case ui::NativeTheme::kNormal: return views::CustomButton::STATE_NORMAL;
case ui::NativeTheme::kPressed: return views::CustomButton::STATE_PRESSED;
case ui::NativeTheme::kMaxState: NOTREACHED() << "Unknown state: " << state;
}
return views::CustomButton::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->native_theme())
theme->Paint(canvas->sk_canvas(), part, state, rect, extra);
else
border->GetImages(GetButtonState(state))->Paint(canvas, rect.size());
}
} // namespace
LabelButtonBorder::LabelButtonBorder() : native_theme_(false) {
SetImages(CustomButton::STATE_HOVERED, BorderImages(BorderImages::kHot));
SetImages(CustomButton::STATE_PRESSED, BorderImages(BorderImages::kPushed));
}
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::State state;
ui::NativeTheme::ExtraParams extra;
const ui::NativeTheme* theme = view.GetNativeTheme();
const ui::Animation* animation = native_theme_delegate->GetThemeAnimation();
if (animation && animation->is_animating()) {
// Paint the background state.
state = native_theme_delegate->GetBackgroundThemeState(&extra);
PaintHelper(this, canvas, theme, part, state, rect, extra);
// Composite the foreground state above the background state.
const int alpha = animation->CurrentValueBetween(0, 255);
canvas->SaveLayerAlpha(static_cast<uint8>(alpha));
state = native_theme_delegate->GetForegroundThemeState(&extra);
PaintHelper(this, canvas, theme, part, state, rect, extra);
canvas->Restore();
} else {
state = native_theme_delegate->GetThemeState(&extra);
PaintHelper(this, canvas, theme, part, state, rect, extra);
}
// Draw the Views focus border for the native theme style.
if (native_theme() && view.focus_border() && extra.button.is_focused)
view.focus_border()->Paint(view, canvas);
}
gfx::Insets LabelButtonBorder::GetInsets() const {
if (native_theme()) {
return gfx::Insets(kPreferredNativeThemePaddingVertical,
kPreferredNativeThemePaddingHorizontal,
kPreferredNativeThemePaddingVertical,
kPreferredNativeThemePaddingHorizontal);
} else {
return gfx::Insets(kPreferredPaddingVertical, kPreferredPaddingHorizontal,
kPreferredPaddingVertical, kPreferredPaddingHorizontal);
}
}
BorderImages* LabelButtonBorder::GetImages(CustomButton::ButtonState state) {
return &images_[state];
}
void LabelButtonBorder::SetImages(CustomButton::ButtonState state,
const BorderImages& set) {
images_[state] = set;
}
} // namespace views
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