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// Copyright (c) 2010 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 VIEWS_CONTROLS_IMAGE_VIEW_H_
#define VIEWS_CONTROLS_IMAGE_VIEW_H_
#include "third_party/skia/include/core/SkBitmap.h"
#include "views/view.h"
namespace gfx {
class Canvas;
}
namespace views {
/////////////////////////////////////////////////////////////////////////////
//
// ImageView class.
//
// An ImageView can display an image from an SkBitmap. 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 ImageView : public View {
public:
enum Alignment {
LEADING = 0,
CENTER,
TRAILING
};
ImageView();
virtual ~ImageView();
// Set the bitmap that should be displayed.
void SetImage(const SkBitmap& bm);
// Set the bitmap that should be displayed from a pointer. Reset the image
// if the pointer is NULL. The pointer contents is copied in the receiver's
// bitmap.
void SetImage(SkBitmap* bm);
// Returns the bitmap currently displayed or NULL of none is currently set.
// The returned bitmap is still owned by the ImageView.
const SkBitmap& GetImage();
// Set the desired image size for the receiving ImageView.
void SetImageSize(const gfx::Size& image_size);
// Return the preferred size for the receiving view. Returns false if the
// preferred size is not defined, which means that the view uses the image
// size.
bool GetImageSize(gfx::Size* image_size);
// Returns the actual bounds of the visible image inside the view.
gfx::Rect GetImageBounds() const;
// Reset the image size to the current image dimensions.
void ResetImageSize();
// Set / Get the horizontal alignment.
void SetHorizontalAlignment(Alignment ha);
Alignment GetHorizontalAlignment();
// Set / Get the vertical alignment.
void SetVerticalAlignment(Alignment va);
Alignment GetVerticalAlignment();
// Set / Get the tooltip text.
void SetTooltipText(const std::wstring& tooltip);
std::wstring GetTooltipText();
// Overriden from View
virtual gfx::Size GetPreferredSize();
virtual void Paint(gfx::Canvas* canvas);
virtual bool GetAccessibleRole(AccessibilityTypes::Role* role);
virtual bool GetTooltipText(const gfx::Point& p, std::wstring* tooltip);
private:
// Compute the image origin given the desired size and the receiver alignment
// properties.
gfx::Point ComputeImageOrigin(const gfx::Size& image_size) const;
// Whether the image size is set.
bool image_size_set_;
// The actual image size.
gfx::Size image_size_;
// The underlying bitmap.
SkBitmap image_;
// Horizontal alignment.
Alignment horiz_alignment_;
// Vertical alignment.
Alignment vert_alignment_;
// The current tooltip text.
std::wstring tooltip_text_;
DISALLOW_COPY_AND_ASSIGN(ImageView);
};
} // namespace views
#endif // VIEWS_CONTROLS_IMAGE_VIEW_H_
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