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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_PAINTER_H_
- #define UI_VIEWS_PAINTER_H_
- #include <stddef.h>
- #include <memory>
- #include "third_party/skia/include/core/SkBlendMode.h"
- #include "third_party/skia/include/core/SkColor.h"
- #include "ui/base/nine_image_painter_factory.h"
- #include "ui/gfx/geometry/insets.h"
- #include "ui/views/views_export.h"
- namespace gfx {
- class Canvas;
- class ImageSkia;
- class InsetsF;
- class Rect;
- class Size;
- } // namespace gfx
- namespace ui {
- class LayerOwner;
- }
- namespace views {
- class View;
- // Painter, as the name implies, is responsible for painting in a particular
- // region. Think of Painter as a Border or Background that can be painted
- // in any region of a View.
- class VIEWS_EXPORT Painter {
- public:
- Painter();
- Painter(const Painter&) = delete;
- Painter& operator=(const Painter&) = delete;
- virtual ~Painter();
- // A convenience method for painting a Painter in a particular region.
- // This translates the canvas to x/y and paints the painter.
- static void PaintPainterAt(gfx::Canvas* canvas,
- Painter* painter,
- const gfx::Rect& rect);
- // Convenience that paints |focus_painter| only if |view| HasFocus() and
- // |focus_painter| is non-NULL.
- static void PaintFocusPainter(View* view,
- gfx::Canvas* canvas,
- Painter* focus_painter);
- // Creates a painter that draws a RoundRect with a solid color and given
- // corner radius.
- static std::unique_ptr<Painter> CreateSolidRoundRectPainter(
- SkColor color,
- float radius,
- const gfx::Insets& insets = gfx::Insets(),
- SkBlendMode blend_mode = SkBlendMode::kSrcOver,
- bool antialias = true);
- // Creates a painter that draws a RoundRect with a solid color and a given
- // corner radius, and also adds a 1px border (inset) in the given color.
- static std::unique_ptr<Painter> CreateRoundRectWith1PxBorderPainter(
- SkColor bg_color,
- SkColor stroke_color,
- float radius,
- SkBlendMode blend_mode = SkBlendMode::kSrcOver,
- bool antialias = true);
- // Creates a painter that divides |image| into nine regions. The four corners
- // are rendered at the size specified in insets (eg. the upper-left corner is
- // rendered at 0 x 0 with a size of insets.left() x insets.top()). The center
- // and edge images are stretched to fill the painted area.
- static std::unique_ptr<Painter> CreateImagePainter(
- const gfx::ImageSkia& image,
- const gfx::Insets& insets);
- // Creates a painter that paints images in a scalable grid. The images must
- // share widths by column and heights by row. The corners are painted at full
- // size, while center and edge images are stretched to fill the painted area.
- // The center image may be zero (to be skipped). This ordering must be used:
- // Top-Left/Top/Top-Right/Left/[Center]/Right/Bottom-Left/Bottom/Bottom-Right.
- static std::unique_ptr<Painter> CreateImageGridPainter(const int image_ids[]);
- // Deprecated: used the InsetsF version below.
- static std::unique_ptr<Painter> CreateSolidFocusPainter(
- SkColor color,
- const gfx::Insets& insets);
- // |thickness| is in dip.
- static std::unique_ptr<Painter> CreateSolidFocusPainter(
- SkColor color,
- int thickness,
- const gfx::InsetsF& insets);
- // Creates and returns a texture layer that is painted by |painter|.
- static std::unique_ptr<ui::LayerOwner> CreatePaintedLayer(
- std::unique_ptr<Painter> painter);
- // Returns the minimum size this painter can paint without obvious graphical
- // problems (e.g. overlapping images).
- virtual gfx::Size GetMinimumSize() const = 0;
- // Paints the painter in the specified region.
- virtual void Paint(gfx::Canvas* canvas, const gfx::Size& size) = 0;
- };
- } // namespace views
- #endif // UI_VIEWS_PAINTER_H_
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