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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
#define UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
#include "base/memory/raw_ptr.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/base/models/image_model.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/views/controls/image_view_base.h"
#include "ui/views/metadata/view_factory.h"
#include "ui/views/views_export.h"
namespace gfx {
class Canvas;
}
namespace views {
/////////////////////////////////////////////////////////////////////////////
//
// ImageView class.
//
// An ImageView can display an image from an ImageSkia. If a size is provided,
// the ImageView will resize the provided image to fit if it is too big or will
// center the image if smaller. Otherwise, the preferred size matches the
// provided image size.
//
/////////////////////////////////////////////////////////////////////////////
class VIEWS_EXPORT ImageView : public ImageViewBase {
METADATA_HEADER(ImageView, ImageViewBase)
public:
ImageView();
explicit ImageView(const ui::ImageModel& image_model);
ImageView(const ImageView&) = delete;
ImageView& operator=(const ImageView&) = delete;
~ImageView() override;
// Sets the image that should be displayed.
void SetImage(const ui::ImageModel& image_model);
// Returns the image currently displayed, which can be empty if not set.
// TODO(pkasting): Convert to an ImageModel getter.
gfx::ImageSkia GetImage() const;
ui::ImageModel GetImageModel() const;
// Set or get the `corner_radius`.
void SetCornerRadius(int corner_radius);
int GetCornerRadius() const;
// Overridden from View:
void OnPaint(gfx::Canvas* canvas) override;
protected:
// Overridden from ImageViewBase:
gfx::Size GetImageSize() const override;
void OnThemeChanged() override;
private:
friend class ImageViewTest;
void OnPaintImage(gfx::Canvas* canvas);
// Gets an ImageSkia to paint that has proper rep for |scale|. Note that if
// there is no existing rep of `scale`, we will utilize the image resize
// operation to create one. The resize may be time consuming for a big image.
gfx::ImageSkia GetPaintImage(float scale);
// Returns true if |image_model| is the same as the last image we painted.
// This is intended to be a quick check, not exhaustive. In other words it's
// possible for this to return false even though the images are in fact equal.
bool IsImageEqual(const ui::ImageModel& image_model) const;
// The underlying image.
ui::ImageModel image_model_;
// Caches the scaled image reps.
gfx::ImageSkia scaled_image_;
int corner_radius_ = 0;
};
BEGIN_VIEW_BUILDER(VIEWS_EXPORT, ImageView, ImageViewBase)
VIEW_BUILDER_OVERLOAD_METHOD(SetImage, const ui::ImageModel&)
VIEW_BUILDER_PROPERTY(int, CornerRadius)
END_VIEW_BUILDER
} // namespace views
DEFINE_VIEW_BUILDER(VIEWS_EXPORT, ImageView)
#endif // UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
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