mirror of
https://github.com/juce-framework/JUCE.git
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137 lines
4.2 KiB
C++
137 lines
4.2 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-9 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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*/
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#include "../../../core/juce_StandardHeader.h"
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BEGIN_JUCE_NAMESPACE
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#include "juce_ImagePreviewComponent.h"
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#include "../../graphics/imaging/juce_ImageFileFormat.h"
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#include "../../../io/files/juce_FileInputStream.h"
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//==============================================================================
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ImagePreviewComponent::ImagePreviewComponent()
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: currentThumbnail (0)
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{
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}
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ImagePreviewComponent::~ImagePreviewComponent()
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{
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delete currentThumbnail;
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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 = roundDoubleToInt (scale * w);
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h = roundDoubleToInt (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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deleteAndZero (currentThumbnail);
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currentDetails = String::empty;
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repaint();
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FileInputStream* const in = fileToLoad.createInputStream();
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if (in != 0)
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{
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ImageFileFormat* const format = ImageFileFormat::findImageFormatForStream (*in);
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if (format != 0)
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{
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currentThumbnail = format->decodeImage (*in);
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if (currentThumbnail != 0)
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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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Image* const reduced = currentThumbnail->createCopy (w, h);
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delete currentThumbnail;
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currentThumbnail = reduced;
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}
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}
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delete in;
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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 != 0)
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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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END_JUCE_NAMESPACE
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