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// Copyright 2015 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_BASE_COCOA_THREE_PART_IMAGE_H
#define UI_BASE_COCOA_THREE_PART_IMAGE_H
#import <Cocoa/Cocoa.h>
#include "base/mac/scoped_nsobject.h"
#include "ui/base/ui_base_export.h"
namespace ui {
// A wrapper around NSDrawThreePartImage that caches the images.
// The middle image is optional.
// Vertical orientation is not currently supported.
class UI_BASE_EXPORT ThreePartImage {
public:
// |left_id|, |middle_id|, and |right_id| are ResourceBundle image
// identifiers. Specify 0 for |middle_id| if there is no middle image.
ThreePartImage(int left_id, int middle_id, int right_id);
~ThreePartImage();
// Returns the image rects if drawn in |bounds|.
NSRect GetLeftRect(NSRect bounds) const;
NSRect GetMiddleRect(NSRect bounds) const;
NSRect GetRightRect(NSRect bounds) const;
// Draws the three part image inside |rect|.
void DrawInRect(NSRect rect, NSCompositingOperation op, CGFloat alpha) const;
// Returns YES if |point| is in a non-transparent part of the images.
// Returns YES if |point| is inside the middle rect and there is no middle
// image.
BOOL HitTest(NSPoint point, NSRect bounds) const;
private:
// Returns YES if |point| is in a non-transparent part of |image|.
BOOL HitTestImage(NSPoint point, NSImage* image, NSRect imageRect) const;
base::scoped_nsobject<NSImage> leftImage_;
base::scoped_nsobject<NSImage> middleImage_;
base::scoped_nsobject<NSImage> rightImage_;
NSSize leftSize_;
NSSize rightSize_;
DISALLOW_COPY_AND_ASSIGN(ThreePartImage);
};
} // namespace ui
#endif // UI_BASE_COCOA_THREE_PART_IMAGE_H
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