demo/Source/PluginEditor.cpp

   1 /*
   2   ==============================================================================
   3
   4     This file was auto-generated by the Jucer!
   5
   6     It contains the basic startup code for a Juce application.
   7
   8   ==============================================================================
   9 */
  10
  11 #include "PluginProcessor.h"
  12 #include "PluginEditor.h"
  13
  14 //==============================================================================
  15 JuceDemoPluginAudioProcessorEditor::JuceDemoPluginAudioProcessorEditor (JuceDemoPluginAudioProcessor* ownerFilter)
  16     : AudioProcessorEditor (ownerFilter),
  17       midiKeyboard (ownerFilter->keyboardState, MidiKeyboardComponent::horizontalKeyboard),
  18       infoLabel (String::empty),
  19       gainLabel ("", "Throughput level:"),
  20       delayLabel ("", "Delay:"),
  21       gainSlider ("gain"),
  22       delaySlider ("delay")
  23 {
  24     // add some sliders..
  25     addAndMakeVisible (&gainSlider);
  26     gainSlider.setSliderStyle (Slider::Rotary);
  27     gainSlider.addListener (this);
  28     gainSlider.setRange (0.0, 1.0, 0.01);
  29
  30     addAndMakeVisible (&delaySlider);
  31     delaySlider.setSliderStyle (Slider::Rotary);
  32     delaySlider.addListener (this);
  33     delaySlider.setRange (0.0, 1.0, 0.01);
  34
  35     // add some labels for the sliders..
  36     gainLabel.attachToComponent (&gainSlider, false);
  37     gainLabel.setFont (Font (11.0f));
  38
  39     delayLabel.attachToComponent (&delaySlider, false);
  40     delayLabel.setFont (Font (11.0f));
  41
  42     // add the midi keyboard component..
  43     addAndMakeVisible (&midiKeyboard);
  44
  45     // add a label that will display the current timecode and status..
  46     addAndMakeVisible (&infoLabel);
  47     infoLabel.setColour (Label::textColourId, Colours::blue);
  48
  49     // add the triangular resizer component for the bottom-right of the UI
  50     addAndMakeVisible (resizer = new ResizableCornerComponent (this, &resizeLimits));
  51     resizeLimits.setSizeLimits (150, 150, 800, 300);
  52
  53     // set our component's initial size to be the last one that was stored in the filter's settings
  54     setSize (ownerFilter->lastUIWidth,
  55              ownerFilter->lastUIHeight);
  56
  57     startTimer (50);
  58 }
  59
  60 JuceDemoPluginAudioProcessorEditor::~JuceDemoPluginAudioProcessorEditor()
  61 {
  62 }
  63
  64 //==============================================================================
  65 void JuceDemoPluginAudioProcessorEditor::paint (Graphics& g)
  66 {
  67     g.setGradientFill (ColourGradient (Colours::white, 0, 0, Colours::grey, 0, (float) getHeight(), false));
  68     g.fillAll();
  69 }
  70
  71 void JuceDemoPluginAudioProcessorEditor::resized()
  72 {
  73     infoLabel.setBounds (10, 4, 400, 25);
  74     gainSlider.setBounds (20, 60, 150, 40);
  75     delaySlider.setBounds (200, 60, 150, 40);
  76
  77     const int keyboardHeight = 70;
  78     midiKeyboard.setBounds (4, getHeight() - keyboardHeight - 4, getWidth() - 8, keyboardHeight);
  79
  80     resizer->setBounds (getWidth() - 16, getHeight() - 16, 16, 16);
  81
  82     getProcessor()->lastUIWidth = getWidth();
  83     getProcessor()->lastUIHeight = getHeight();
  84 }
  85
  86 //==============================================================================
  87 // This timer periodically checks whether any of the filter's parameters have changed...
  88 void JuceDemoPluginAudioProcessorEditor::timerCallback()
  89 {
  90     JuceDemoPluginAudioProcessor* ourProcessor = getProcessor();
  91
  92     AudioPlayHead::CurrentPositionInfo newPos (ourProcessor->lastPosInfo);
  93
  94     if (lastDisplayedPosition != newPos)
  95         displayPositionInfo (newPos);
  96
  97     gainSlider.setValue (ourProcessor->gain, false);
  98     delaySlider.setValue (ourProcessor->delay, false);
  99 }
 100
 101 // This is our Slider::Listener callback, when the user drags a slider.
 102 void JuceDemoPluginAudioProcessorEditor::sliderValueChanged (Slider* slider)
 103 {
 104     if (slider == &gainSlider)
 105     {
 106         // It's vital to use setParameterNotifyingHost to change any parameters that are automatable
 107         // by the host, rather than just modifying them directly, otherwise the host won't know
 108         // that they've changed.
 109         getProcessor()->setParameterNotifyingHost (JuceDemoPluginAudioProcessor::gainParam,
 110                                                    (float) gainSlider.getValue());
 111     }
 112     else if (slider == &delaySlider)
 113     {
 114         getProcessor()->setParameterNotifyingHost (JuceDemoPluginAudioProcessor::delayParam,
 115                                                    (float) delaySlider.getValue());
 116     }
 117 }
 118
 119 //==============================================================================
 120 // quick-and-dirty function to format a timecode string
 121 static const String timeToTimecodeString (const double seconds)
 122 {
 123     const double absSecs = fabs (seconds);
 124
 125     const int hours = (int) (absSecs / (60.0 * 60.0));
 126     const int mins  = ((int) (absSecs / 60.0)) % 60;
 127     const int secs  = ((int) absSecs) % 60;
 128
 129     String s;
 130     if (seconds < 0)
 131         s = "-";
 132
 133     s << String (hours).paddedLeft ('0', 2) << ":"
 134       << String (mins).paddedLeft ('0', 2) << ":"
 135       << String (secs).paddedLeft ('0', 2) << ":"
 136       << String (roundToInt (absSecs * 1000) % 1000).paddedLeft ('0', 3);
 137
 138     return s;
 139 }
 140
 141 // quick-and-dirty function to format a bars/beats string
 142 static const String ppqToBarsBeatsString (double ppq, double /*lastBarPPQ*/, int numerator, int denominator)
 143 {
 144     if (numerator == 0 || denominator == 0)
 145         return "1|1|0";
 146
 147     const int ppqPerBar = (numerator * 4 / denominator);
 148     const double beats  = (fmod (ppq, ppqPerBar) / ppqPerBar) * numerator;
 149
 150     const int bar    = ((int) ppq) / ppqPerBar + 1;
 151     const int beat   = ((int) beats) + 1;
 152     const int ticks  = ((int) (fmod (beats, 1.0) * 960.0));
 153
 154     String s;
 155     s << bar << '|' << beat << '|' << ticks;
 156     return s;
 157 }
 158
 159 // Updates the text in our position label.
 160 void JuceDemoPluginAudioProcessorEditor::displayPositionInfo (const AudioPlayHead::CurrentPositionInfo& pos)
 161 {
 162     lastDisplayedPosition = pos;
 163     String displayText;
 164     displayText.preallocateBytes (128);
 165
 166     displayText << String (pos.bpm, 2) << " bpm, "
 167                 << pos.timeSigNumerator << '/' << pos.timeSigDenominator
 168                 << "  -  " << timeToTimecodeString (pos.timeInSeconds)
 169                 << "  -  " << ppqToBarsBeatsString (pos.ppqPosition, pos.ppqPositionOfLastBarStart,
 170                                                     pos.timeSigNumerator, pos.timeSigDenominator);
 171
 172     if (pos.isRecording)
 173         displayText << "  (recording)";
 174     else if (pos.isPlaying)
 175         displayText << "  (playing)";
 176
 177     infoLabel.setText (displayText, false);
 178 }