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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_CONTROLS_IMAGE_VIEW_H_
#define UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
#include "ui/gfx/image/image_skia.h"
#include "ui/views/view.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 View {
public:
enum Alignment {
LEADING = 0,
CENTER,
TRAILING
};
ImageView();
virtual ~ImageView();
// Set the image that should be displayed.
void SetImage(const gfx::ImageSkia& img);
// Set the image that should be displayed from a pointer. Reset the image
// if the pointer is NULL. The pointer contents is copied in the receiver's
// image.
void SetImage(const gfx::ImageSkia* image_skia);
// Returns the image currently displayed or NULL of none is currently set.
// The returned image is still owned by the ImageView.
const gfx::ImageSkia& 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() const;
// Set / Get the vertical alignment.
void SetVerticalAlignment(Alignment va);
Alignment GetVerticalAlignment() const;
// Set / Get the tooltip text.
void SetTooltipText(const string16& tooltip);
string16 GetTooltipText() const;
// Overriden from View
virtual gfx::Size GetPreferredSize() OVERRIDE;
virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
virtual bool GetTooltipText(const gfx::Point& p,
string16* tooltip) const OVERRIDE;
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 image.
gfx::ImageSkia image_;
// Horizontal alignment.
Alignment horiz_alignment_;
// Vertical alignment.
Alignment vert_alignment_;
// The current tooltip text.
string16 tooltip_text_;
DISALLOW_COPY_AND_ASSIGN(ImageView);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
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