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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2015 - ROLI Ltd.
Permission is granted to use this software under the terms of either:
a) the GPL v2 (or any later version)
b) the Affero GPL v3
Details of these licenses can be found at: www.gnu.org/licenses
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.juce.com for more information.
==============================================================================
*/
ImagePreviewComponent::ImagePreviewComponent()
{
}
ImagePreviewComponent::~ImagePreviewComponent()
{
}
//==============================================================================
void ImagePreviewComponent::getThumbSize (int& w, int& h) const
{
const int availableW = proportionOfWidth (0.97f);
const int availableH = getHeight() - 13 * 4;
const double scale = jmin (1.0,
availableW / (double) w,
availableH / (double) h);
w = roundToInt (scale * w);
h = roundToInt (scale * h);
}
void ImagePreviewComponent::selectedFileChanged (const File& file)
{
if (fileToLoad != file)
{
fileToLoad = file;
startTimer (100);
}
}
void ImagePreviewComponent::timerCallback()
{
stopTimer();
currentThumbnail = Image::null;
currentDetails.clear();
repaint();
ScopedPointer<FileInputStream> in (fileToLoad.createInputStream());
if (in != nullptr)
{
if (ImageFileFormat* const format = ImageFileFormat::findImageFormatForStream (*in))
{
currentThumbnail = format->decodeImage (*in);
if (currentThumbnail.isValid())
{
int w = currentThumbnail.getWidth();
int h = currentThumbnail.getHeight();
currentDetails
<< fileToLoad.getFileName() << "\n"
<< format->getFormatName() << "\n"
<< w << " x " << h << " pixels\n"
<< File::descriptionOfSizeInBytes (fileToLoad.getSize());
getThumbSize (w, h);
currentThumbnail = currentThumbnail.rescaled (w, h);
}
}
}
}
void ImagePreviewComponent::paint (Graphics& g)
{
if (currentThumbnail.isValid())
{
g.setFont (13.0f);
int w = currentThumbnail.getWidth();
int h = currentThumbnail.getHeight();
getThumbSize (w, h);
const int numLines = 4;
const int totalH = 13 * numLines + h + 4;
const int y = (getHeight() - totalH) / 2;
g.drawImageWithin (currentThumbnail,
(getWidth() - w) / 2, y, w, h,
RectanglePlacement::centred | RectanglePlacement::onlyReduceInSize,
false);
g.drawFittedText (currentDetails,
0, y + h + 4, getWidth(), 100,
Justification::centredTop, numLines);
}
}
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