| // 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/background.h" |
| |
| #include <utility> |
| |
| #include "base/check.h" |
| #include "base/macros.h" |
| #include "base/scoped_observation.h" |
| #include "build/build_config.h" |
| #include "cc/paint/paint_flags.h" |
| #include "ui/color/color_id.h" |
| #include "ui/color/color_provider.h" |
| #include "ui/gfx/canvas.h" |
| #include "ui/gfx/color_utils.h" |
| #include "ui/views/painter.h" |
| #include "ui/views/view.h" |
| #include "ui/views/view_observer.h" |
| |
| #if defined(OS_WIN) |
| #include "skia/ext/skia_utils_win.h" |
| #endif |
| |
| namespace views { |
| |
| // SolidBackground is a trivial Background implementation that fills the |
| // background in a solid color. |
| class SolidBackground : public Background { |
| public: |
| explicit SolidBackground(SkColor color) { SetNativeControlColor(color); } |
| |
| SolidBackground(const SolidBackground&) = delete; |
| SolidBackground& operator=(const SolidBackground&) = delete; |
| |
| void Paint(gfx::Canvas* canvas, View* view) const override { |
| // Fill the background. Note that we don't constrain to the bounds as |
| // canvas is already clipped for us. |
| canvas->DrawColor(get_color()); |
| } |
| }; |
| |
| // RoundedRectBackground is a filled solid colored background that has |
| // rounded corners. |
| class RoundedRectBackground : public Background { |
| public: |
| RoundedRectBackground(SkColor color, float radius) : radius_(radius) { |
| SetNativeControlColor(color); |
| } |
| |
| RoundedRectBackground(const RoundedRectBackground&) = delete; |
| RoundedRectBackground& operator=(const RoundedRectBackground&) = delete; |
| |
| void Paint(gfx::Canvas* canvas, View* view) const override { |
| cc::PaintFlags flags; |
| flags.setAntiAlias(true); |
| flags.setStyle(cc::PaintFlags::kFill_Style); |
| flags.setColor(get_color()); |
| canvas->DrawRoundRect(gfx::RectF(view->GetLocalBounds()), radius_, flags); |
| } |
| |
| private: |
| float radius_; |
| }; |
| |
| // ThemedVectorIconBackground is an image drawn on the view's background using |
| // ThemedVectorIcon to react to theme changes. |
| class ThemedVectorIconBackground : public Background, public ViewObserver { |
| public: |
| explicit ThemedVectorIconBackground(View* view, |
| const ui::ThemedVectorIcon& icon) |
| : icon_(icon) { |
| DCHECK(!icon_.empty()); |
| observation_.Observe(view); |
| OnViewThemeChanged(view); |
| } |
| |
| ThemedVectorIconBackground(const ThemedVectorIconBackground&) = delete; |
| ThemedVectorIconBackground& operator=(const ThemedVectorIconBackground&) = |
| delete; |
| |
| // ViewObserver: |
| void OnViewThemeChanged(View* view) override { view->SchedulePaint(); } |
| void OnViewIsDeleting(View* view) override { |
| DCHECK(observation_.IsObservingSource(view)); |
| observation_.Reset(); |
| } |
| |
| void Paint(gfx::Canvas* canvas, View* view) const override { |
| canvas->DrawImageInt(icon_.GetImageSkia(view->GetColorProvider()), 0, 0); |
| } |
| |
| private: |
| const ui::ThemedVectorIcon icon_; |
| base::ScopedObservation<View, ViewObserver> observation_{this}; |
| }; |
| |
| // ThemedSolidBackground is a solid background that stays in sync with a view's |
| // native theme. |
| class ThemedSolidBackground : public SolidBackground, public ViewObserver { |
| public: |
| explicit ThemedSolidBackground(View* view, ui::ColorId color_id) |
| : SolidBackground(gfx::kPlaceholderColor), color_id_(color_id) { |
| observation_.Observe(view); |
| if (view->GetWidget()) |
| OnViewThemeChanged(view); |
| } |
| |
| ThemedSolidBackground(const ThemedSolidBackground&) = delete; |
| ThemedSolidBackground& operator=(const ThemedSolidBackground&) = delete; |
| |
| ~ThemedSolidBackground() override = default; |
| |
| // ViewObserver: |
| void OnViewThemeChanged(View* view) override { |
| SetNativeControlColor(view->GetColorProvider()->GetColor(color_id_)); |
| view->SchedulePaint(); |
| } |
| void OnViewIsDeleting(View* view) override { |
| DCHECK(observation_.IsObservingSource(view)); |
| observation_.Reset(); |
| } |
| |
| private: |
| base::ScopedObservation<View, ViewObserver> observation_{this}; |
| ui::ColorId color_id_; |
| }; |
| |
| class BackgroundPainter : public Background { |
| public: |
| explicit BackgroundPainter(std::unique_ptr<Painter> painter) |
| : painter_(std::move(painter)) { |
| DCHECK(painter_); |
| } |
| |
| BackgroundPainter(const BackgroundPainter&) = delete; |
| BackgroundPainter& operator=(const BackgroundPainter&) = delete; |
| |
| ~BackgroundPainter() override = default; |
| |
| void Paint(gfx::Canvas* canvas, View* view) const override { |
| Painter::PaintPainterAt(canvas, painter_.get(), view->GetLocalBounds()); |
| } |
| |
| private: |
| std::unique_ptr<Painter> painter_; |
| }; |
| |
| Background::Background() = default; |
| |
| Background::~Background() = default; |
| |
| void Background::SetNativeControlColor(SkColor color) { |
| color_ = color; |
| } |
| |
| std::unique_ptr<Background> CreateSolidBackground(SkColor color) { |
| return std::make_unique<SolidBackground>(color); |
| } |
| |
| std::unique_ptr<Background> CreateRoundedRectBackground(SkColor color, |
| float radius) { |
| return std::make_unique<RoundedRectBackground>(color, radius); |
| } |
| |
| std::unique_ptr<Background> CreateThemedVectorIconBackground( |
| View* view, |
| const ui::ThemedVectorIcon& icon) { |
| return std::make_unique<ThemedVectorIconBackground>(view, icon); |
| } |
| |
| std::unique_ptr<Background> CreateThemedSolidBackground(View* view, |
| ui::ColorId color_id) { |
| return std::make_unique<ThemedSolidBackground>(view, color_id); |
| } |
| |
| std::unique_ptr<Background> CreateBackgroundFromPainter( |
| std::unique_ptr<Painter> painter) { |
| return std::make_unique<BackgroundPainter>(std::move(painter)); |
| } |
| |
| } // namespace views |