122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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ImagePreviewComponent::ImagePreviewComponent()
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{
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}
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ImagePreviewComponent::~ImagePreviewComponent()
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{
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}
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//==============================================================================
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void ImagePreviewComponent::getThumbSize (int& w, int& h) const
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{
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const int availableW = proportionOfWidth (0.97f);
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const int availableH = getHeight() - 13 * 4;
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const double scale = jmin (1.0,
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availableW / (double) w,
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availableH / (double) h);
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w = roundToInt (scale * w);
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h = roundToInt (scale * h);
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}
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void ImagePreviewComponent::selectedFileChanged (const File& file)
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{
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if (fileToLoad != file)
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{
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fileToLoad = file;
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startTimer (100);
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}
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}
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void ImagePreviewComponent::timerCallback()
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{
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stopTimer();
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currentThumbnail = Image();
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currentDetails.clear();
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repaint();
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std::unique_ptr<FileInputStream> in (fileToLoad.createInputStream());
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if (in != nullptr && in->getFile().existsAsFile())
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{
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if (ImageFileFormat* const format = ImageFileFormat::findImageFormatForStream (*in))
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{
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currentThumbnail = format->decodeImage (*in);
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if (currentThumbnail.isValid())
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{
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int w = currentThumbnail.getWidth();
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int h = currentThumbnail.getHeight();
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currentDetails
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<< fileToLoad.getFileName() << "\n"
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<< format->getFormatName() << "\n"
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<< w << " x " << h << " pixels\n"
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<< File::descriptionOfSizeInBytes (fileToLoad.getSize());
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getThumbSize (w, h);
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currentThumbnail = currentThumbnail.rescaled (w, h);
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}
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}
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}
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}
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void ImagePreviewComponent::paint (Graphics& g)
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{
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if (currentThumbnail.isValid())
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{
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g.setFont (13.0f);
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int w = currentThumbnail.getWidth();
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int h = currentThumbnail.getHeight();
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getThumbSize (w, h);
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const int numLines = 4;
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const int totalH = 13 * numLines + h + 4;
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const int y = (getHeight() - totalH) / 2;
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g.drawImageWithin (currentThumbnail,
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(getWidth() - w) / 2, y, w, h,
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RectanglePlacement::centred | RectanglePlacement::onlyReduceInSize,
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false);
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g.drawFittedText (currentDetails,
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0, y + h + 4, getWidth(), 100,
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Justification::centredTop, numLines);
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}
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}
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} // namespace juce
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