- clean working copy for leaving SVN
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/*
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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 2004-12 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 "../JuceDemoHeader.h"
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#if JUCE_USE_CAMERA
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//==============================================================================
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class CameraDemo : public Component,
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private ComboBoxListener,
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private ButtonListener,
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private CameraDevice::Listener,
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private AsyncUpdater
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{
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public:
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CameraDemo()
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: cameraSelectorComboBox ("Camera"),
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snapshotButton ("Take a snapshot"),
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recordMovieButton ("Record a movie (to your desktop)..."),
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recordingMovie (false)
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{
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setOpaque (true);
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addAndMakeVisible (cameraSelectorComboBox);
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updateCameraList();
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cameraSelectorComboBox.setSelectedId (1);
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cameraSelectorComboBox.addListener (this);
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addAndMakeVisible (snapshotButton);
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snapshotButton.addListener (this);
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snapshotButton.setEnabled (false);
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addAndMakeVisible (recordMovieButton);
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recordMovieButton.addListener (this);
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recordMovieButton.setEnabled (false);
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addAndMakeVisible (lastSnapshot);
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cameraSelectorComboBox.setSelectedId (2);
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}
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//==============================================================================
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void paint (Graphics& g) override
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{
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g.fillAll (Colours::black);
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}
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void resized() override
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{
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Rectangle<int> r (getLocalBounds().reduced (5));
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Rectangle<int> top (r.removeFromTop (25));
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cameraSelectorComboBox.setBounds (top.removeFromLeft (250));
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r.removeFromTop (4);
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top = r.removeFromTop (25);
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snapshotButton.changeWidthToFitText (24);
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snapshotButton.setBounds (top.removeFromLeft (snapshotButton.getWidth()));
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top.removeFromLeft (4);
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recordMovieButton.changeWidthToFitText (24);
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recordMovieButton.setBounds (top.removeFromLeft (recordMovieButton.getWidth()));
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r.removeFromTop (4);
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Rectangle<int> previewArea (r.removeFromTop (r.getHeight() / 2));
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if (cameraPreviewComp != nullptr)
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cameraPreviewComp->setBounds (previewArea);
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r.removeFromTop (4);
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lastSnapshot.setBounds (r);
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}
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private:
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//==============================================================================
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ScopedPointer<CameraDevice> cameraDevice;
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ScopedPointer<Component> cameraPreviewComp;
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ImageComponent lastSnapshot;
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ComboBox cameraSelectorComboBox;
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TextButton snapshotButton;
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TextButton recordMovieButton;
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bool recordingMovie;
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void updateCameraList()
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{
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cameraSelectorComboBox.clear();
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cameraSelectorComboBox.addItem ("No camera", 1);
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cameraSelectorComboBox.addSeparator();
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StringArray cameras = CameraDevice::getAvailableDevices();
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for (int i = 0; i < cameras.size(); ++i)
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cameraSelectorComboBox.addItem (cameras[i], i + 2);
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}
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void comboBoxChanged (ComboBox*) override
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{
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// This is called when the user chooses a camera from the drop-down list.
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cameraDevice = nullptr;
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cameraPreviewComp = nullptr;
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recordingMovie = false;
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if (cameraSelectorComboBox.getSelectedId() > 1)
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{
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// Try to open the user's choice of camera..
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cameraDevice = CameraDevice::openDevice (cameraSelectorComboBox.getSelectedId() - 2);
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// and if it worked, create a preview component for it..
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if (cameraDevice != nullptr)
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addAndMakeVisible (cameraPreviewComp = cameraDevice->createViewerComponent());
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}
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snapshotButton.setEnabled (cameraDevice != nullptr);
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recordMovieButton.setEnabled (cameraDevice != nullptr);
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resized();
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}
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void buttonClicked (Button* b) override
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{
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if (cameraDevice != nullptr)
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{
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if (b == &recordMovieButton)
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{
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// The user has clicked the record movie button..
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if (! recordingMovie)
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{
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// Start recording to a file on the user's desktop..
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recordingMovie = true;
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File file (File::getSpecialLocation (File::userDesktopDirectory)
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.getNonexistentChildFile ("JuceCameraDemo",
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CameraDevice::getFileExtension()));
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cameraDevice->startRecordingToFile (file);
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recordMovieButton.setButtonText ("Stop Recording");
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}
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else
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{
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// Already recording, so stop...
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recordingMovie = false;
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cameraDevice->stopRecording();
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recordMovieButton.setButtonText ("Start recording (to a file on your desktop)");
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}
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}
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else
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{
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// When the user clicks the snapshot button, we'll attach ourselves to
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// the camera as a listener, and wait for an image to arrive...
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cameraDevice->addListener (this);
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}
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}
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}
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// This is called by the camera device when a new image arrives
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void imageReceived (const Image& image) override
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{
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// In this app we just want to take one image, so as soon as this happens,
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// we'll unregister ourselves as a listener.
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if (cameraDevice != nullptr)
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cameraDevice->removeListener (this);
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// This callback won't be on the message thread, so to get the image back to
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// the message thread, we'll stash a pointer to it (which is reference-counted in
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// a thead-safe way), and trigger an async callback which will then display the
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// new image..
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incomingImage = image;
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triggerAsyncUpdate();
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}
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Image incomingImage;
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void handleAsyncUpdate() override
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{
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if (incomingImage.isValid())
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lastSnapshot.setImage (incomingImage);
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CameraDemo);
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};
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// This static object will register this demo type in a global list of demos..
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static JuceDemoType<CameraDemo> demo ("29 Graphics: Camera Capture");
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#endif // JUCE_USE_CAMERA
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