mirror of
https://github.com/juce-framework/JUCE.git
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135 lines
4.3 KiB
C++
135 lines
4.3 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE 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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auto availableW = proportionOfWidth (0.97f);
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auto availableH = getHeight() - 13 * 4;
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auto 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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FileInputStream in (fileToLoad);
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if (in.openedOk() && fileToLoad.existsAsFile())
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{
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if (auto 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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auto w = currentThumbnail.getWidth();
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auto 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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auto w = currentThumbnail.getWidth();
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auto h = currentThumbnail.getHeight();
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getThumbSize (w, h);
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const int numLines = 4;
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auto totalH = 13 * numLines + h + 4;
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auto 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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//==============================================================================
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std::unique_ptr<AccessibilityHandler> ImagePreviewComponent::createAccessibilityHandler()
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{
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return std::make_unique<AccessibilityHandler> (*this, AccessibilityRole::image);
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}
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} // namespace juce
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