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JUCE/extras/JuceDemo/Source/demos/AudioDemoPlaybackPage.cpp
jules 82976c2ac7 Introjucer: some code-gen updates.
2013-04-16 10:40:46 +01:00

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/*
==============================================================================
This is an automatically generated GUI class created by the Introjucer!
Be careful when adding custom code to these files, as only the code within
the "//[xyz]" and "//[/xyz]" sections will be retained when the file is loaded
and re-saved.
Created with Introjucer version: 3.1.0
------------------------------------------------------------------------------
The Introjucer is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-13 by Raw Material Software Ltd.
==============================================================================
*/
//[Headers] You can add your own extra header files here...
//[/Headers]
#include "AudioDemoPlaybackPage.h"
//[MiscUserDefs] You can add your own user definitions and misc code here...
class DemoThumbnailComp : public Component,
public ChangeListener,
public FileDragAndDropTarget,
private Timer
{
public:
DemoThumbnailComp (AudioFormatManager& formatManager,
AudioTransportSource& transportSource_,
Slider& zoomSlider_)
: transportSource (transportSource_),
zoomSlider (zoomSlider_),
thumbnailCache (5),
thumbnail (512, formatManager, thumbnailCache)
{
startTime = endTime = 0;
thumbnail.addChangeListener (this);
currentPositionMarker.setFill (Colours::purple.withAlpha (0.7f));
addAndMakeVisible (&currentPositionMarker);
}
~DemoThumbnailComp()
{
thumbnail.removeChangeListener (this);
}
void setFile (const File& file)
{
thumbnail.setSource (new FileInputSource (file));
startTime = 0;
endTime = thumbnail.getTotalLength();
startTimer (1000 / 40);
}
void setZoomFactor (double amount)
{
if (thumbnail.getTotalLength() > 0)
{
const double newScale = jmax (0.001, thumbnail.getTotalLength() * (1.0 - jlimit (0.0, 0.99, amount)));
const double timeAtCentre = xToTime (getWidth() / 2.0f);
startTime = timeAtCentre - newScale * 0.5;
endTime = timeAtCentre + newScale * 0.5;
repaint();
}
}
void mouseWheelMove (const MouseEvent&, const MouseWheelDetails& wheel)
{
if (thumbnail.getTotalLength() > 0)
{
double newStart = startTime - wheel.deltaX * (endTime - startTime) / 10.0;
newStart = jlimit (0.0, jmax (0.0, thumbnail.getTotalLength() - (endTime - startTime)), newStart);
endTime = newStart + (endTime - startTime);
startTime = newStart;
if (wheel.deltaY != 0)
zoomSlider.setValue (zoomSlider.getValue() - wheel.deltaY);
repaint();
}
}
void paint (Graphics& g)
{
g.fillAll (Colours::white);
g.setColour (Colours::lightblue);
if (thumbnail.getTotalLength() > 0)
{
thumbnail.drawChannels (g, getLocalBounds().reduced (2),
startTime, endTime, 1.0f);
}
else
{
g.setFont (14.0f);
g.drawFittedText ("(No audio file selected)", getLocalBounds(), Justification::centred, 2);
}
}
void changeListenerCallback (ChangeBroadcaster*)
{
// this method is called by the thumbnail when it has changed, so we should repaint it..
repaint();
}
bool isInterestedInFileDrag (const StringArray& /*files*/)
{
return true;
}
void filesDropped (const StringArray& files, int /*x*/, int /*y*/)
{
AudioDemoPlaybackPage* demoPage = findParentComponentOfClass<AudioDemoPlaybackPage>();
if (demoPage != nullptr)
demoPage->showFile (File (files[0]));
}
void mouseDown (const MouseEvent& e)
{
mouseDrag (e);
}
void mouseDrag (const MouseEvent& e)
{
transportSource.setPosition (jmax (0.0, xToTime ((float) e.x)));
}
void mouseUp (const MouseEvent&)
{
transportSource.start();
}
void timerCallback()
{
currentPositionMarker.setVisible (transportSource.isPlaying() || isMouseButtonDown());
double currentPlayPosition = transportSource.getCurrentPosition();
currentPositionMarker.setRectangle (Rectangle<float> (timeToX (currentPlayPosition) - 0.75f, 0,
1.5f, (float) getHeight()));
}
private:
AudioTransportSource& transportSource;
Slider& zoomSlider;
AudioThumbnailCache thumbnailCache;
AudioThumbnail thumbnail;
double startTime, endTime;
DrawableRectangle currentPositionMarker;
float timeToX (const double time) const
{
return getWidth() * (float) ((time - startTime) / (endTime - startTime));
}
double xToTime (const float x) const
{
return (x / getWidth()) * (endTime - startTime) + startTime;
}
};
//[/MiscUserDefs]
//==============================================================================
AudioDemoPlaybackPage::AudioDemoPlaybackPage (AudioDeviceManager& deviceManager_)
: deviceManager (deviceManager_),
thread ("audio file preview"),
directoryList (nullptr, thread)
{
addAndMakeVisible (zoomLabel = new Label (String::empty,
"zoom:"));
zoomLabel->setFont (Font (15.00f, Font::plain));
zoomLabel->setJustificationType (Justification::centredRight);
zoomLabel->setEditable (false, false, false);
zoomLabel->setColour (TextEditor::textColourId, Colours::black);
zoomLabel->setColour (TextEditor::backgroundColourId, Colour (0x00000000));
addAndMakeVisible (explanation = new Label (String::empty,
"Select an audio file in the treeview above, and this page will display its waveform, and let you play it.."));
explanation->setFont (Font (14.00f, Font::plain));
explanation->setJustificationType (Justification::bottomRight);
explanation->setEditable (false, false, false);
explanation->setColour (TextEditor::textColourId, Colours::black);
explanation->setColour (TextEditor::backgroundColourId, Colour (0x00000000));
addAndMakeVisible (zoomSlider = new Slider (String::empty));
zoomSlider->setRange (0, 1, 0);
zoomSlider->setSliderStyle (Slider::LinearHorizontal);
zoomSlider->setTextBoxStyle (Slider::NoTextBox, false, 80, 20);
zoomSlider->addListener (this);
zoomSlider->setSkewFactor (2);
addAndMakeVisible (thumbnail = new DemoThumbnailComp (formatManager, transportSource, *zoomSlider));
addAndMakeVisible (startStopButton = new TextButton (String::empty));
startStopButton->setButtonText ("Play/Stop");
startStopButton->addListener (this);
startStopButton->setColour (TextButton::buttonColourId, Colour (0xff79ed7f));
addAndMakeVisible (fileTreeComp = new FileTreeComponent (directoryList));
//[UserPreSize]
//[/UserPreSize]
setSize (600, 400);
//[Constructor] You can add your own custom stuff here..
formatManager.registerBasicFormats();
directoryList.setDirectory (File::getSpecialLocation (File::userHomeDirectory), true, true);
thread.startThread (3);
fileTreeComp->setColour (FileTreeComponent::backgroundColourId, Colours::white);
fileTreeComp->addListener (this);
deviceManager.addAudioCallback (&audioSourcePlayer);
audioSourcePlayer.setSource (&transportSource);
//[/Constructor]
}
AudioDemoPlaybackPage::~AudioDemoPlaybackPage()
{
//[Destructor_pre]. You can add your own custom destruction code here..
transportSource.setSource (nullptr);
audioSourcePlayer.setSource (nullptr);
deviceManager.removeAudioCallback (&audioSourcePlayer);
fileTreeComp->removeListener (this);
//[/Destructor_pre]
zoomLabel = nullptr;
explanation = nullptr;
zoomSlider = nullptr;
thumbnail = nullptr;
startStopButton = nullptr;
fileTreeComp = nullptr;
//[Destructor]. You can add your own custom destruction code here..
//[/Destructor]
}
//==============================================================================
void AudioDemoPlaybackPage::paint (Graphics& g)
{
//[UserPrePaint] Add your own custom painting code here..
//[/UserPrePaint]
g.fillAll (Colours::lightgrey);
//[UserPaint] Add your own custom painting code here..
//[/UserPaint]
}
void AudioDemoPlaybackPage::resized()
{
zoomLabel->setBounds (16, getHeight() - 90, 55, 24);
explanation->setBounds (256, getHeight() - 82, getWidth() - 275, 64);
zoomSlider->setBounds (72, getHeight() - 90, 200, 24);
thumbnail->setBounds (16, getHeight() - 221, getWidth() - 32, 123);
startStopButton->setBounds (16, getHeight() - 46, 150, 32);
fileTreeComp->setBounds (16, 8, getWidth() - 32, getHeight() - 245);
//[UserResized] Add your own custom resize handling here..
//[/UserResized]
}
void AudioDemoPlaybackPage::sliderValueChanged (Slider* sliderThatWasMoved)
{
//[UsersliderValueChanged_Pre]
//[/UsersliderValueChanged_Pre]
if (sliderThatWasMoved == zoomSlider)
{
//[UserSliderCode_zoomSlider] -- add your slider handling code here..
thumbnail->setZoomFactor (zoomSlider->getValue());
//[/UserSliderCode_zoomSlider]
}
//[UsersliderValueChanged_Post]
//[/UsersliderValueChanged_Post]
}
void AudioDemoPlaybackPage::buttonClicked (Button* buttonThatWasClicked)
{
//[UserbuttonClicked_Pre]
//[/UserbuttonClicked_Pre]
if (buttonThatWasClicked == startStopButton)
{
//[UserButtonCode_startStopButton] -- add your button handler code here..
if (transportSource.isPlaying())
{
transportSource.stop();
}
else
{
transportSource.setPosition (0);
transportSource.start();
}
//[/UserButtonCode_startStopButton]
}
//[UserbuttonClicked_Post]
//[/UserbuttonClicked_Post]
}
//[MiscUserCode] You can add your own definitions of your custom methods or any other code here...
void AudioDemoPlaybackPage::showFile (const File& file)
{
loadFileIntoTransport (file);
zoomSlider->setValue (0, dontSendNotification);
thumbnail->setFile (file);
}
void AudioDemoPlaybackPage::loadFileIntoTransport (const File& audioFile)
{
// unload the previous file source and delete it..
transportSource.stop();
transportSource.setSource (nullptr);
currentAudioFileSource = nullptr;
AudioFormatReader* reader = formatManager.createReaderFor (audioFile);
if (reader != nullptr)
{
currentAudioFileSource = new AudioFormatReaderSource (reader, true);
// ..and plug it into our transport source
transportSource.setSource (currentAudioFileSource,
32768, // tells it to buffer this many samples ahead
&thread, // this is the background thread to use for reading-ahead
reader->sampleRate);
}
}
void AudioDemoPlaybackPage::selectionChanged()
{
showFile (fileTreeComp->getSelectedFile());
}
void AudioDemoPlaybackPage::fileClicked (const File&, const MouseEvent&)
{
}
void AudioDemoPlaybackPage::fileDoubleClicked (const File&)
{
}
//[/MiscUserCode]
//==============================================================================
#if 0
/* -- Introjucer information section --
This is where the Introjucer stores the metadata that describe this GUI layout, so
make changes in here at your peril!
BEGIN_JUCER_METADATA
<JUCER_COMPONENT documentType="Component" className="AudioDemoPlaybackPage" componentName=""
parentClasses="public Component, public FileBrowserListener"
constructorParams="AudioDeviceManager&amp; deviceManager_" variableInitialisers="deviceManager (deviceManager_),&#10;thread (&quot;audio file preview&quot;),&#10;directoryList (nullptr, thread)"
snapPixels="8" snapActive="1" snapShown="1" overlayOpacity="0.330000013"
fixedSize="0" initialWidth="600" initialHeight="400">
<BACKGROUND backgroundColour="ffd3d3d3"/>
<LABEL name="" id="d4f78f975d81c8d3" memberName="zoomLabel" virtualName=""
explicitFocusOrder="0" pos="16 90R 55 24" edTextCol="ff000000"
edBkgCol="0" labelText="zoom:" editableSingleClick="0" editableDoubleClick="0"
focusDiscardsChanges="0" fontname="Default font" fontsize="15"
bold="0" italic="0" justification="34"/>
<LABEL name="" id="7db7d0a64ef21311" memberName="explanation" virtualName=""
explicitFocusOrder="0" pos="256 82R 275M 64" edTextCol="ff000000"
edBkgCol="0" labelText="Select an audio file in the treeview above, and this page will display its waveform, and let you play it.."
editableSingleClick="0" editableDoubleClick="0" focusDiscardsChanges="0"
fontname="Default font" fontsize="14" bold="0" italic="0" justification="18"/>
<SLIDER name="" id="38bbc108f4c96092" memberName="zoomSlider" virtualName=""
explicitFocusOrder="0" pos="72 90R 200 24" min="0" max="1" int="0"
style="LinearHorizontal" textBoxPos="NoTextBox" textBoxEditable="1"
textBoxWidth="80" textBoxHeight="20" skewFactor="2"/>
<GENERICCOMPONENT name="" id="beef657b0e007936" memberName="thumbnail" virtualName=""
explicitFocusOrder="0" pos="16 221R 32M 123" class="DemoThumbnailComp"
params="formatManager, transportSource, *zoomSlider"/>
<TEXTBUTTON name="" id="abe446e2f3f09420" memberName="startStopButton" virtualName=""
explicitFocusOrder="0" pos="16 46R 150 32" bgColOff="ff79ed7f"
buttonText="Play/Stop" connectedEdges="0" needsCallback="1" radioGroupId="0"/>
<GENERICCOMPONENT name="" id="1de1dc6a18a9032b" memberName="fileTreeComp" virtualName=""
explicitFocusOrder="0" pos="16 8 32M 245M" class="FileTreeComponent"
params="directoryList"/>
</JUCER_COMPONENT>
END_JUCER_METADATA
*/
#endif
//[EndFile] You can add extra defines here...
//[/EndFile]
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