juce/source/extras/JuceDemo/Source/demos/AudioDemoPlaybackPage.cpp

   1 /*
   2   ==============================================================================
   3
   4   This is an automatically generated file created by the Jucer!
   5
   6   Creation date:  1 May 2011 12:08:14pm
   7
   8   Be careful when adding custom code to these files, as only the code within
   9   the "//[xyz]" and "//[/xyz]" sections will be retained when the file is loaded
  10   and re-saved.
  11
  12   Jucer version: 1.12
  13
  14   ------------------------------------------------------------------------------
  15
  16   The Jucer is part of the JUCE library - "Jules' Utility Class Extensions"
  17   Copyright 2004-6 by Raw Material Software ltd.
  18
  19   ==============================================================================
  20 */
  21
  22 //[Headers] You can add your own extra header files here...
  23 //[/Headers]
  24
  25 #include "AudioDemoPlaybackPage.h"
  26
  27
  28 //[MiscUserDefs] You can add your own user definitions and misc code here...
  29 class DemoThumbnailComp  : public Component,
  30                            public ChangeListener,
  31                            public FileDragAndDropTarget
  32 {
  33 public:
  34     DemoThumbnailComp()
  35         : thumbnailCache (5),
  36           thumbnail (512, formatManager, thumbnailCache)
  37     {
  38         startTime = endTime = 0;
  39         formatManager.registerBasicFormats();
  40         thumbnail.addChangeListener (this);
  41     }
  42
  43     ~DemoThumbnailComp()
  44     {
  45         thumbnail.removeChangeListener (this);
  46     }
  47
  48     void setFile (const File& file)
  49     {
  50         thumbnail.setSource (new FileInputSource (file));
  51         startTime = 0;
  52         endTime = thumbnail.getTotalLength();
  53     }
  54
  55     void setZoomFactor (double amount)
  56     {
  57         if (thumbnail.getTotalLength() > 0)
  58         {
  59             double timeDisplayed = jmax (0.001, (thumbnail.getTotalLength() - startTime) * (1.0 - jlimit (0.0, 1.0, amount)));
  60             endTime = startTime + timeDisplayed;
  61             repaint();
  62         }
  63     }
  64
  65     void mouseWheelMove (const MouseEvent&, float wheelIncrementX, float wheelIncrementY)
  66     {
  67         if (thumbnail.getTotalLength() > 0)
  68         {
  69             double newStart = startTime + (wheelIncrementX + wheelIncrementY) * (endTime - startTime) / 10.0;
  70             newStart = jlimit (0.0, thumbnail.getTotalLength() - (endTime - startTime), newStart);
  71             endTime = newStart + (endTime - startTime);
  72             startTime = newStart;
  73             repaint();
  74         }
  75     }
  76
  77     void paint (Graphics& g)
  78     {
  79         g.fillAll (Colours::white);
  80
  81         g.setColour (Colours::mediumblue);
  82
  83         if (thumbnail.getTotalLength() > 0)
  84         {
  85             thumbnail.drawChannels (g, getLocalBounds().reduced (2, 2),
  86                                     startTime, endTime, 1.0f);
  87         }
  88         else
  89         {
  90             g.setFont (14.0f);
  91             g.drawFittedText ("(No audio file selected)", 0, 0, getWidth(), getHeight(),
  92                               Justification::centred, 2);
  93         }
  94     }
  95
  96     void changeListenerCallback (ChangeBroadcaster*)
  97     {
  98         // this method is called by the thumbnail when it has changed, so we should repaint it..
  99         repaint();
 100     }
 101
 102     bool isInterestedInFileDrag (const StringArray& /*files*/)
 103     {
 104         return true;
 105     }
 106
 107     void filesDropped (const StringArray& files, int /*x*/, int /*y*/)
 108     {
 109         AudioDemoPlaybackPage* demoPage = findParentComponentOfClass ((AudioDemoPlaybackPage*) 0);
 110
 111         if (demoPage != 0)
 112             demoPage->showFile (File (files[0]));
 113     }
 114
 115     AudioFormatManager formatManager;
 116     AudioThumbnailCache thumbnailCache;
 117     AudioThumbnail thumbnail;
 118     double startTime, endTime;
 119 };
 120
 121 //[/MiscUserDefs]
 122
 123 //==============================================================================
 124 AudioDemoPlaybackPage::AudioDemoPlaybackPage (AudioDeviceManager& deviceManager_)
 125     : deviceManager (deviceManager_),
 126       thread ("audio file preview"),
 127       directoryList (0, thread),
 128       zoomLabel (0),
 129       thumbnail (0),
 130       startStopButton (0),
 131       fileTreeComp (0),
 132       explanation (0),
 133       zoomSlider (0)
 134 {
 135     addAndMakeVisible (zoomLabel = new Label (String::empty,
 136                                               L"zoom:"));
 137     zoomLabel->setFont (Font (15.0000f, Font::plain));
 138     zoomLabel->setJustificationType (Justification::centredRight);
 139     zoomLabel->setEditable (false, false, false);
 140     zoomLabel->setColour (TextEditor::textColourId, Colours::black);
 141     zoomLabel->setColour (TextEditor::backgroundColourId, Colour (0x0));
 142
 143     addAndMakeVisible (thumbnail = new DemoThumbnailComp());
 144
 145     addAndMakeVisible (startStopButton = new TextButton (String::empty));
 146     startStopButton->setButtonText (L"Play/Stop");
 147     startStopButton->addListener (this);
 148     startStopButton->setColour (TextButton::buttonColourId, Colour (0xff79ed7f));
 149
 150     addAndMakeVisible (fileTreeComp = new FileTreeComponent (directoryList));
 151
 152     addAndMakeVisible (explanation = new Label (String::empty,
 153                                                 L"Select an audio file in the treeview above, and this page will display its waveform, and let you play it.."));
 154     explanation->setFont (Font (14.0000f, Font::plain));
 155     explanation->setJustificationType (Justification::bottomRight);
 156     explanation->setEditable (false, false, false);
 157     explanation->setColour (TextEditor::textColourId, Colours::black);
 158     explanation->setColour (TextEditor::backgroundColourId, Colour (0x0));
 159
 160     addAndMakeVisible (zoomSlider = new Slider (String::empty));
 161     zoomSlider->setRange (0, 1, 0);
 162     zoomSlider->setSliderStyle (Slider::LinearHorizontal);
 163     zoomSlider->setTextBoxStyle (Slider::NoTextBox, false, 80, 20);
 164     zoomSlider->addListener (this);
 165     zoomSlider->setSkewFactor (2);
 166
 167
 168     //[UserPreSize]
 169     //[/UserPreSize]
 170
 171     setSize (600, 400);
 172
 173
 174     //[Constructor] You can add your own custom stuff here..
 175     directoryList.setDirectory (File::getSpecialLocation (File::userHomeDirectory), true, true);
 176     thread.startThread (3);
 177
 178     fileTreeComp->setColour (FileTreeComponent::backgroundColourId, Colours::white);
 179     fileTreeComp->addListener (this);
 180
 181     deviceManager.addAudioCallback (&audioSourcePlayer);
 182     audioSourcePlayer.setSource (&transportSource);
 183     //[/Constructor]
 184 }
 185
 186 AudioDemoPlaybackPage::~AudioDemoPlaybackPage()
 187 {
 188     //[Destructor_pre]. You can add your own custom destruction code here..
 189     transportSource.setSource (0);
 190     audioSourcePlayer.setSource (0);
 191
 192     deviceManager.removeAudioCallback (&audioSourcePlayer);
 193     fileTreeComp->removeListener (this);
 194     //[/Destructor_pre]
 195
 196     deleteAndZero (zoomLabel);
 197     deleteAndZero (thumbnail);
 198     deleteAndZero (startStopButton);
 199     deleteAndZero (fileTreeComp);
 200     deleteAndZero (explanation);
 201     deleteAndZero (zoomSlider);
 202
 203
 204     //[Destructor]. You can add your own custom destruction code here..
 205     //[/Destructor]
 206 }
 207
 208 //==============================================================================
 209 void AudioDemoPlaybackPage::paint (Graphics& g)
 210 {
 211     //[UserPrePaint] Add your own custom painting code here..
 212     //[/UserPrePaint]
 213
 214     g.fillAll (Colours::lightgrey);
 215
 216     //[UserPaint] Add your own custom painting code here..
 217     //[/UserPaint]
 218 }
 219
 220 void AudioDemoPlaybackPage::resized()
 221 {
 222     zoomLabel->setBounds (16, getHeight() - 90, 55, 24);
 223     thumbnail->setBounds (16, getHeight() - 221, getWidth() - 32, 123);
 224     startStopButton->setBounds (16, getHeight() - 46, 150, 32);
 225     fileTreeComp->setBounds (16, 8, getWidth() - 32, getHeight() - 245);
 226     explanation->setBounds (256, getHeight() - 82, getWidth() - 275, 64);
 227     zoomSlider->setBounds (72, getHeight() - 90, 200, 24);
 228     //[UserResized] Add your own custom resize handling here..
 229     //[/UserResized]
 230 }
 231
 232 void AudioDemoPlaybackPage::buttonClicked (Button* buttonThatWasClicked)
 233 {
 234     //[UserbuttonClicked_Pre]
 235     //[/UserbuttonClicked_Pre]
 236
 237     if (buttonThatWasClicked == startStopButton)
 238     {
 239         //[UserButtonCode_startStopButton] -- add your button handler code here..
 240         if (transportSource.isPlaying())
 241         {
 242             transportSource.stop();
 243         }
 244         else
 245         {
 246             transportSource.setPosition (0);
 247             transportSource.start();
 248         }
 249         //[/UserButtonCode_startStopButton]
 250     }
 251
 252     //[UserbuttonClicked_Post]
 253     //[/UserbuttonClicked_Post]
 254 }
 255
 256 void AudioDemoPlaybackPage::sliderValueChanged (Slider* sliderThatWasMoved)
 257 {
 258     //[UsersliderValueChanged_Pre]
 259     //[/UsersliderValueChanged_Pre]
 260
 261     if (sliderThatWasMoved == zoomSlider)
 262     {
 263         //[UserSliderCode_zoomSlider] -- add your slider handling code here..
 264         thumbnail->setZoomFactor (zoomSlider->getValue());
 265         //[/UserSliderCode_zoomSlider]
 266     }
 267
 268     //[UsersliderValueChanged_Post]
 269     //[/UsersliderValueChanged_Post]
 270 }
 271
 272
 273
 274 //[MiscUserCode] You can add your own definitions of your custom methods or any other code here...
 275
 276 void AudioDemoPlaybackPage::showFile (const File& file)
 277 {
 278     loadFileIntoTransport (file);
 279
 280     zoomSlider->setValue (0, false, false);
 281     thumbnail->setFile (file);
 282 }
 283
 284 void AudioDemoPlaybackPage::loadFileIntoTransport (const File& audioFile)
 285 {
 286     // unload the previous file source and delete it..
 287     transportSource.stop();
 288     transportSource.setSource (0);
 289     currentAudioFileSource = 0;
 290
 291     // get a format manager and set it up with the basic types (wav and aiff).
 292     AudioFormatManager formatManager;
 293     formatManager.registerBasicFormats();
 294
 295     AudioFormatReader* reader = formatManager.createReaderFor (audioFile);
 296
 297     if (reader != 0)
 298     {
 299         currentAudioFileSource = new AudioFormatReaderSource (reader, true);
 300
 301         // ..and plug it into our transport source
 302         transportSource.setSource (currentAudioFileSource,
 303                                    32768, // tells it to buffer this many samples ahead
 304                                    reader->sampleRate);
 305     }
 306 }
 307
 308 void AudioDemoPlaybackPage::selectionChanged()
 309 {
 310     showFile (fileTreeComp->getSelectedFile());
 311 }
 312
 313 void AudioDemoPlaybackPage::fileClicked (const File&, const MouseEvent&)
 314 {
 315 }
 316
 317 void AudioDemoPlaybackPage::fileDoubleClicked (const File&)
 318 {
 319 }
 320 //[/MiscUserCode]
 321
 322
 323 //==============================================================================
 324 #if 0
 325 /*  -- Jucer information section --
 326
 327     This is where the Jucer puts all of its metadata, so don't change anything in here!
 328
 329 BEGIN_JUCER_METADATA
 330
 331 <JUCER_COMPONENT documentType="Component" className="AudioDemoPlaybackPage" componentName=""
 332                  parentClasses="public Component, public FileBrowserListener"
 333                  constructorParams="AudioDeviceManager&amp; deviceManager_" variableInitialisers="deviceManager (deviceManager_),&#10;thread (&quot;audio file preview&quot;),&#10;directoryList (0, thread)"
 334                  snapPixels="8" snapActive="1" snapShown="1" overlayOpacity="0.330000013"
 335                  fixedSize="0" initialWidth="600" initialHeight="400">
 336   <BACKGROUND backgroundColour="ffd3d3d3"/>
 337   <LABEL name="" id="d4f78f975d81c8d3" memberName="zoomLabel" virtualName=""
 338          explicitFocusOrder="0" pos="16 90R 55 24" edTextCol="ff000000"
 339          edBkgCol="0" labelText="zoom:" editableSingleClick="0" editableDoubleClick="0"
 340          focusDiscardsChanges="0" fontname="Default font" fontsize="15"
 341          bold="0" italic="0" justification="34"/>
 342   <GENERICCOMPONENT name="" id="beef657b0e007936" memberName="thumbnail" virtualName=""
 343                     explicitFocusOrder="0" pos="16 221R 32M 123" class="DemoThumbnailComp"
 344                     params=""/>
 345   <TEXTBUTTON name="" id="abe446e2f3f09420" memberName="startStopButton" virtualName=""
 346               explicitFocusOrder="0" pos="16 46R 150 32" bgColOff="ff79ed7f"
 347               buttonText="Play/Stop" connectedEdges="0" needsCallback="1" radioGroupId="0"/>
 348   <GENERICCOMPONENT name="" id="1de1dc6a18a9032b" memberName="fileTreeComp" virtualName=""
 349                     explicitFocusOrder="0" pos="16 8 32M 245M" class="FileTreeComponent"
 350                     params="directoryList"/>
 351   <LABEL name="" id="7db7d0a64ef21311" memberName="explanation" virtualName=""
 352          explicitFocusOrder="0" pos="256 82R 275M 64" edTextCol="ff000000"
 353          edBkgCol="0" labelText="Select an audio file in the treeview above, and this page will display its waveform, and let you play it.."
 354          editableSingleClick="0" editableDoubleClick="0" focusDiscardsChanges="0"
 355          fontname="Default font" fontsize="14" bold="0" italic="0" justification="18"/>
 356   <SLIDER name="" id="38bbc108f4c96092" memberName="zoomSlider" virtualName=""
 357           explicitFocusOrder="0" pos="72 90R 200 24" min="0" max="1" int="0"
 358           style="LinearHorizontal" textBoxPos="NoTextBox" textBoxEditable="1"
 359           textBoxWidth="80" textBoxHeight="20" skewFactor="2"/>
 360 </JUCER_COMPONENT>
 361
 362 END_JUCER_METADATA
 363 */
 364 #endif