JUCE/modules/juce_gui_basics/filebrowser/juce_ImagePreviewComponent.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

//==============================================================================
/**
    A simple preview component that shows thumbnails of image files.

    @see FileChooserDialogBox, FilePreviewComponent

    @tags{GUI}
*/
class JUCE_API  ImagePreviewComponent  : public FilePreviewComponent,
                                         private Timer
{
public:
    //==============================================================================
    /** Creates an ImagePreviewComponent. */
    ImagePreviewComponent();

    /** Destructor. */
    ~ImagePreviewComponent() override;


    //==============================================================================
    /** @internal */
    void selectedFileChanged (const File& newSelectedFile) override;
    /** @internal */
    void paint (Graphics&) override;
    /** @internal */
    void timerCallback() override;

private:
    File fileToLoad;
    Image currentThumbnail;
    String currentDetails;

    void getThumbSize (int& w, int& h) const;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ImagePreviewComponent)
};

} // namespace juce