andrewm@0: /*
andrewm@0:   This code accompanies the textbook:
andrewm@0:  
andrewm@0:   Digital Audio Effects: Theory, Implementation and Application
andrewm@0:   Joshua D. Reiss and Andrew P. McPherson
andrewm@0:  
andrewm@0:   ---
andrewm@0:  
andrewm@0:   Chorus: chorus effect based on time-varying delays
andrewm@0:   See textbook Chapter 2: Delay Line Effects
andrewm@0:  
andrewm@0:   Code by Andrew McPherson, Brecht de Man and Joshua Reiss
andrewm@0:  
andrewm@0:   ---
andrewm@0: 
andrewm@0:   This program is free software: you can redistribute it and/or modify
andrewm@0:   it under the terms of the GNU General Public License as published by
andrewm@0:   the Free Software Foundation, either version 3 of the License, or
andrewm@0:   (at your option) any later version.
andrewm@0:  
andrewm@0:   This program is distributed in the hope that it will be useful,
andrewm@0:   but WITHOUT ANY WARRANTY; without even the implied warranty of
andrewm@0:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrewm@0:   GNU General Public License for more details.
andrewm@0: 
andrewm@0:   You should have received a copy of the GNU General Public License
andrewm@0:   along with this program.  If not, see <http://www.gnu.org/licenses/>.
andrewm@0: */
andrewm@0: 
andrewm@0: #include "PluginProcessor.h"
andrewm@0: #include "PluginEditor.h"
andrewm@0: 
andrewm@0: 
andrewm@0: //==============================================================================
andrewm@0: ChorusAudioProcessorEditor::ChorusAudioProcessorEditor (ChorusAudioProcessor* ownerFilter)
andrewm@0:     : AudioProcessorEditor (ownerFilter),
andrewm@0:       delayLabel_("", "Min. Delay (sec):"),
andrewm@0:       sweepWidthLabel_("", "Sweep Width (sec.):"),
andrewm@0:       depthLabel_("", "Depth:"),
andrewm@0:       frequencyLabel_("", "LFO Frequency:"),
andrewm@0:       waveformLabel_("", "LFO Waveform:"),
andrewm@0:       interpolationLabel_("", "Interpolation Type:"),
andrewm@0:       numVoicesLabel_("", "Number of Voices:")
andrewm@0: {
andrewm@0: 
andrewm@0:     // Set up the sliders
andrewm@0:     addAndMakeVisible (&delaySlider_);
andrewm@0:     delaySlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     delaySlider_.addListener (this);
andrewm@0:     delaySlider_.setRange (.01, ChorusAudioProcessor::kMaximumDelay, 0.001);
andrewm@0:     
andrewm@0:     addAndMakeVisible (&sweepWidthSlider_);
andrewm@0:     sweepWidthSlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     sweepWidthSlider_.addListener (this);
andrewm@0:     sweepWidthSlider_.setRange (.01, ChorusAudioProcessor::kMaximumSweepWidth, 0.001);
andrewm@0:     
andrewm@0:     addAndMakeVisible (&depthSlider_);
andrewm@0:     depthSlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     depthSlider_.addListener (this);
andrewm@0:     depthSlider_.setRange (0.0, 1.0, 0.01);
andrewm@0:     
andrewm@0:     addAndMakeVisible (&frequencySlider_);
andrewm@0:     frequencySlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     frequencySlider_.addListener (this);
andrewm@0:     frequencySlider_.setRange (0.05, 2.0, 0.025);
andrewm@0:     
andrewm@0:     addAndMakeVisible(&waveformComboBox_);
andrewm@0:     waveformComboBox_.setEditableText(false);
andrewm@0:     waveformComboBox_.setJustificationType(Justification::left);
andrewm@0:     waveformComboBox_.addItem("Sine", ChorusAudioProcessor::kWaveformSine);
andrewm@0:     waveformComboBox_.addItem("Triangle", ChorusAudioProcessor::kWaveformTriangle);
andrewm@0:     waveformComboBox_.addItem("Square", ChorusAudioProcessor::kWaveformSquare);
andrewm@0:     waveformComboBox_.addItem("Sawtooth", ChorusAudioProcessor::kWaveformSawtooth);
andrewm@0:     waveformComboBox_.addListener(this);
andrewm@0:     
andrewm@0:     addAndMakeVisible(&interpolationComboBox_);
andrewm@0:     interpolationComboBox_.setEditableText(false);
andrewm@0:     interpolationComboBox_.setJustificationType(Justification::left);
andrewm@0:     interpolationComboBox_.addItem("None", ChorusAudioProcessor::kInterpolationNearestNeighbour);
andrewm@0:     interpolationComboBox_.addItem("Linear", ChorusAudioProcessor::kInterpolationLinear);
andrewm@0:     interpolationComboBox_.addItem("Cubic", ChorusAudioProcessor::kInterpolationCubic);
andrewm@0:     interpolationComboBox_.addListener(this);
andrewm@0:     
andrewm@0:     addAndMakeVisible(&numVoicesComboBox_);
andrewm@0:     numVoicesComboBox_.setEditableText(false);
andrewm@0:     numVoicesComboBox_.setJustificationType(Justification::left);
andrewm@0:     numVoicesComboBox_.addItem("2", 2);
andrewm@0:     numVoicesComboBox_.addItem("3", 3);
andrewm@0:     numVoicesComboBox_.addItem("4", 4);
andrewm@0:     numVoicesComboBox_.addItem("5", 5);
andrewm@0:     numVoicesComboBox_.addListener(this);
andrewm@0:     
andrewm@0:     addAndMakeVisible(&stereoToggleButton_);
andrewm@0:     stereoToggleButton_.setName("Stereo");
andrewm@0:     stereoToggleButton_.setButtonText("Stereo");
andrewm@0:     stereoToggleButton_.addListener(this);
andrewm@0:     
andrewm@0:     delayLabel_.attachToComponent(&delaySlider_, false);
andrewm@0:     delayLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     sweepWidthLabel_.attachToComponent(&sweepWidthSlider_, false);
andrewm@0:     sweepWidthLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     depthLabel_.attachToComponent(&depthSlider_, false);
andrewm@0:     depthLabel_.setFont(Font (11.0f));
andrewm@0: 
andrewm@0:     frequencyLabel_.attachToComponent(&frequencySlider_, false);
andrewm@0:     frequencyLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     waveformLabel_.attachToComponent(&waveformComboBox_, false);
andrewm@0:     waveformLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     interpolationLabel_.attachToComponent(&interpolationComboBox_, false);
andrewm@0:     interpolationLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     numVoicesLabel_.attachToComponent(&numVoicesComboBox_, false);
andrewm@0:     numVoicesLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     // add the triangular resizer component for the bottom-right of the UI
andrewm@0:     addAndMakeVisible(resizer_ = new ResizableCornerComponent (this, &resizeLimits_));
andrewm@0:     resizeLimits_.setSizeLimits(550, 200, 600, 300);
andrewm@0:     
andrewm@0:     // set our component's initial size to be the last one that was stored in the filter's settings
andrewm@0:     setSize(ownerFilter->lastUIWidth_,
andrewm@0:             ownerFilter->lastUIHeight_);
andrewm@0:     
andrewm@0:     startTimer(50);
andrewm@0: }
andrewm@0: 
andrewm@0: ChorusAudioProcessorEditor::~ChorusAudioProcessorEditor()
andrewm@0: {
andrewm@0: }
andrewm@0: 
andrewm@0: //==============================================================================
andrewm@0: void ChorusAudioProcessorEditor::paint (Graphics& g)
andrewm@0: {
andrewm@0:     g.fillAll (Colours::grey);
andrewm@0: }
andrewm@0: 
andrewm@0: void ChorusAudioProcessorEditor::resized()
andrewm@0: {
andrewm@0:     delaySlider_.setBounds (20, 20, 150, 40);
andrewm@0:     sweepWidthSlider_.setBounds (200, 20, 150, 40);
andrewm@0:     depthSlider_.setBounds(380, 20, 150, 40);
andrewm@0:     frequencySlider_.setBounds(20, 80, 150, 40);
andrewm@0:     numVoicesComboBox_.setBounds(200, 80, 150, 30);
andrewm@0:     waveformComboBox_.setBounds(20, 140, 200, 30);
andrewm@0:     interpolationComboBox_.setBounds(250, 140, 200, 30);
andrewm@0:     stereoToggleButton_.setBounds(380, 80, 150, 40);
andrewm@0:     stereoToggleButton_.changeWidthToFitText();
andrewm@0:     
andrewm@0:     resizer_->setBounds(getWidth() - 16, getHeight() - 16, 16, 16);
andrewm@0:     
andrewm@0:     getProcessor()->lastUIWidth_ = getWidth();
andrewm@0:     getProcessor()->lastUIHeight_ = getHeight();
andrewm@0: }
andrewm@0: 
andrewm@0: //==============================================================================
andrewm@0: // This timer periodically checks whether any of the filter's parameters have changed...
andrewm@0: void ChorusAudioProcessorEditor::timerCallback()
andrewm@0: {
andrewm@0:     ChorusAudioProcessor* ourProcessor = getProcessor();
andrewm@0:     
andrewm@0:     delaySlider_.setValue(ourProcessor->delay_, dontSendNotification);
andrewm@0:     sweepWidthSlider_.setValue(ourProcessor->sweepWidth_, dontSendNotification);
andrewm@0:     depthSlider_.setValue(ourProcessor->depth_, dontSendNotification);
andrewm@0:     frequencySlider_.setValue(ourProcessor->frequency_, dontSendNotification);
b@1:     waveformComboBox_.setSelectedId(ourProcessor->waveform_, dontSendNotification);
b@1:     interpolationComboBox_.setSelectedId(ourProcessor->interpolation_, dontSendNotification);
b@1:     numVoicesComboBox_.setSelectedId(ourProcessor->numVoices_, dontSendNotification);
b@1:     stereoToggleButton_.setToggleState((ourProcessor->stereo_ != 0), dontSendNotification);
andrewm@0: }
andrewm@0: 
andrewm@0: // This is our Slider::Listener callback, when the user drags a slider.
andrewm@0: void ChorusAudioProcessorEditor::sliderValueChanged (Slider* slider)
andrewm@0: {
andrewm@0:     // It's vital to use setParameterNotifyingHost to change any parameters that are automatable
andrewm@0:     // by the host, rather than just modifying them directly, otherwise the host won't know
andrewm@0:     // that they've changed.
andrewm@0:     
andrewm@0:     if (slider == &delaySlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kDelayParam,
andrewm@0:                                                    (float)delaySlider_.getValue());
andrewm@0:     }
andrewm@0:     else if (slider == &sweepWidthSlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kSweepWidthParam,
andrewm@0:                                                    (float)sweepWidthSlider_.getValue());
andrewm@0:     }
andrewm@0:     else if (slider == &depthSlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kDepthParam,
andrewm@0:                                                    (float)depthSlider_.getValue());
andrewm@0:     }
andrewm@0:     else if (slider == &frequencySlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kFrequencyParam,
andrewm@0:                                                    (float)frequencySlider_.getValue());
andrewm@0:     }
andrewm@0: }
andrewm@0: 
andrewm@0: // Similar callback to sliderValueChanged for ComboBox updates
andrewm@0: void ChorusAudioProcessorEditor::comboBoxChanged (ComboBox *comboBox)
andrewm@0: {
andrewm@0:     if(comboBox == &waveformComboBox_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kWaveformParam,
andrewm@0:                                                    (float)waveformComboBox_.getSelectedId());
andrewm@0:     }
andrewm@0:     else if(comboBox == &interpolationComboBox_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kInterpolationParam,
andrewm@0:                                                    (float)interpolationComboBox_.getSelectedId());
andrewm@0:     }
andrewm@0:     else if(comboBox == &numVoicesComboBox_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kNumVoicesParam,
andrewm@0:                                                    (float)numVoicesComboBox_.getSelectedId());
andrewm@0:     }
andrewm@0: }
andrewm@0: 
andrewm@0: // Callback for toggle button
andrewm@0: void ChorusAudioProcessorEditor::buttonClicked (Button *button)
andrewm@0: {
andrewm@0:     if(button == &stereoToggleButton_)
andrewm@0:     {
andrewm@0:         if(button->getToggleState())
andrewm@0:         {
andrewm@0:             getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kStereoParam, 1.0);
andrewm@0:             
andrewm@0:             // Stereo chorus only makes sense with 3 or more voices (1 input, 2 delayed voices)
andrewm@0:             if(numVoicesComboBox_.getSelectedId() == 2)
andrewm@0:             {
andrewm@0:                 numVoicesComboBox_.setSelectedId(3);
andrewm@0:                 getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kNumVoicesParam, 3);
andrewm@0:             }
andrewm@0:             numVoicesComboBox_.setItemEnabled(2, false);
andrewm@0:         }
andrewm@0:         else
andrewm@0:         {
andrewm@0:             getProcessor()->setParameterNotifyingHost (ChorusAudioProcessor::kStereoParam, 0.0);
andrewm@0:             numVoicesComboBox_.setItemEnabled(2, true);
andrewm@0:         }
andrewm@0:     }
andrewm@0: }