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:   Ping-Pong Delay: stereo delay alternating between channels
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: PingPongDelayAudioProcessorEditor::PingPongDelayAudioProcessorEditor (PingPongDelayAudioProcessor* ownerFilter)
andrewm@0:     : AudioProcessorEditor (ownerFilter),
andrewm@0:       delayLengthLeftLabel_("", "L-R Delay (sec):"),
andrewm@0:       delayLengthRightLabel_("", "R-L Delay (sec):"),
andrewm@0:       feedbackLabel_("", "Feedback:"),
andrewm@0:       wetMixLabel_("", "Delayed Mix Level:")
andrewm@0: {
andrewm@0: 
andrewm@0:     // Set up the sliders
andrewm@0:     addAndMakeVisible (&delayLengthLeftSlider_);
andrewm@0:     delayLengthLeftSlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     delayLengthLeftSlider_.addListener (this);
andrewm@0:     delayLengthLeftSlider_.setRange (0.01, 2.0, 0.01);
andrewm@0: 
andrewm@0:     addAndMakeVisible (&delayLengthRightSlider_);
andrewm@0:     delayLengthRightSlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     delayLengthRightSlider_.addListener (this);
andrewm@0:     delayLengthRightSlider_.setRange (0.01, 2.0, 0.01);
andrewm@0:     
andrewm@0:     addAndMakeVisible (&feedbackSlider_);
andrewm@0:     feedbackSlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     feedbackSlider_.addListener (this);
andrewm@0:     feedbackSlider_.setRange (0.0, 0.995, 0.005);
andrewm@0:  
andrewm@0:     addAndMakeVisible (&wetMixSlider_);
andrewm@0:     wetMixSlider_.setSliderStyle (Slider::Rotary);
andrewm@0:     wetMixSlider_.addListener (this);
andrewm@0:     wetMixSlider_.setRange (0.0, 1.0, 0.01);
andrewm@0:     
andrewm@0:     addAndMakeVisible(&linkDelaysButton_);
andrewm@0:     linkDelaysButton_.setName("Link Delays");
andrewm@0:     linkDelaysButton_.setButtonText("Link Delays");
andrewm@0:     linkDelaysButton_.setToggleState(true, dontSendNotification);
andrewm@0:     linkDelaysButton_.addListener(this);
andrewm@0:     
andrewm@0:     addAndMakeVisible(&reverseChannelsButton_);
andrewm@0:     reverseChannelsButton_.setName("Reverse Output Channels");
andrewm@0:     reverseChannelsButton_.setButtonText("Reverse Output Channels");
andrewm@0:     reverseChannelsButton_.setToggleState(false, dontSendNotification);
andrewm@0:     reverseChannelsButton_.addListener(this);
andrewm@0:     
andrewm@0:     linkDelays_ = true;
andrewm@0:     
andrewm@0:     delayLengthLeftLabel_.attachToComponent(&delayLengthLeftSlider_, false);
andrewm@0:     delayLengthLeftLabel_.setFont(Font (11.0f));
andrewm@0: 
andrewm@0:     delayLengthRightLabel_.attachToComponent(&delayLengthRightSlider_, false);
andrewm@0:     delayLengthRightLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     feedbackLabel_.attachToComponent(&feedbackSlider_, false);
andrewm@0:     feedbackLabel_.setFont(Font (11.0f));
andrewm@0:     
andrewm@0:     wetMixLabel_.attachToComponent(&wetMixSlider_, false);
andrewm@0:     wetMixLabel_.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(500, 140, 500, 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: PingPongDelayAudioProcessorEditor::~PingPongDelayAudioProcessorEditor()
andrewm@0: {
andrewm@0: }
andrewm@0: 
andrewm@0: //==============================================================================
andrewm@0: void PingPongDelayAudioProcessorEditor::paint (Graphics& g)
andrewm@0: {
andrewm@0:     g.fillAll (Colours::grey);
andrewm@0: }
andrewm@0: 
andrewm@0: void PingPongDelayAudioProcessorEditor::resized()
andrewm@0: {
andrewm@0:     delayLengthLeftSlider_.setBounds (20, 20, 150, 40);
andrewm@0:     delayLengthRightSlider_.setBounds (200, 20, 150, 40);
andrewm@0:     feedbackSlider_.setBounds (20, 80, 150, 40);
andrewm@0:     wetMixSlider_.setBounds(200, 80, 150, 40);
andrewm@0:     linkDelaysButton_.setBounds(380, 20, 100, 40);
andrewm@0:     linkDelaysButton_.changeWidthToFitText();
andrewm@0:     reverseChannelsButton_.setBounds(380, 80, 100, 40);
andrewm@0:     reverseChannelsButton_.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 PingPongDelayAudioProcessorEditor::timerCallback()
andrewm@0: {
andrewm@0:     PingPongDelayAudioProcessor* ourProcessor = getProcessor();
andrewm@0:     
andrewm@0:     delayLengthLeftSlider_.setValue(ourProcessor->delayLengthLeft_, dontSendNotification);
andrewm@0:     delayLengthRightSlider_.setValue(ourProcessor->delayLengthRight_, dontSendNotification);
andrewm@0:     feedbackSlider_.setValue(ourProcessor->feedback_, dontSendNotification);
andrewm@0:     wetMixSlider_.setValue(ourProcessor->wetMix_, dontSendNotification);
andrewm@0:     reverseChannelsButton_.setToggleState(ourProcessor->reverseChannels_, dontSendNotification);
andrewm@0: }
andrewm@0: 
andrewm@0: // This is our Slider::Listener callback, when the user drags a slider.
andrewm@0: void PingPongDelayAudioProcessorEditor::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 == &delayLengthLeftSlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (PingPongDelayAudioProcessor::kDelayLengthLeftParam,
andrewm@0:                                                    (float)delayLengthLeftSlider_.getValue());
andrewm@0:         if(linkDelays_)
andrewm@0:         {
andrewm@0:             // Set the other slider to match this value
andrewm@0:             getProcessor()->setParameterNotifyingHost (PingPongDelayAudioProcessor::kDelayLengthRightParam,
andrewm@0:                                                        (float)delayLengthLeftSlider_.getValue());
andrewm@0:             delayLengthRightSlider_.setValue(delayLengthLeftSlider_.getValue(), dontSendNotification);
andrewm@0:         }
andrewm@0:     }
andrewm@0:     else if (slider == &delayLengthRightSlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (PingPongDelayAudioProcessor::kDelayLengthRightParam,
andrewm@0:                                                    (float)delayLengthRightSlider_.getValue());
andrewm@0: 
andrewm@0:         if(linkDelays_)
andrewm@0:         {
andrewm@0:             // Set the other slider to match this value
andrewm@0:             getProcessor()->setParameterNotifyingHost (PingPongDelayAudioProcessor::kDelayLengthLeftParam,
andrewm@0:                                                        (float)delayLengthRightSlider_.getValue());
andrewm@0:             delayLengthLeftSlider_.setValue(delayLengthRightSlider_.getValue(), dontSendNotification);
andrewm@0:         }
andrewm@0:     }
andrewm@0:     else if (slider == &feedbackSlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (PingPongDelayAudioProcessor::kFeedbackParam,
andrewm@0:                                                    (float)feedbackSlider_.getValue());
andrewm@0:     }
andrewm@0:     else if (slider == &wetMixSlider_)
andrewm@0:     {
andrewm@0:         getProcessor()->setParameterNotifyingHost (PingPongDelayAudioProcessor::kWetMixParam,
andrewm@0:                                                    (float)wetMixSlider_.getValue());
andrewm@0:     }
andrewm@0: }
andrewm@0: 
andrewm@0: // Callback for toggle button
andrewm@0: void PingPongDelayAudioProcessorEditor::buttonClicked (Button *button)
andrewm@0: {
andrewm@0:     if(button == &linkDelaysButton_)
andrewm@0:     {
andrewm@0:         linkDelays_ = button->getToggleState();
andrewm@0:         
andrewm@0:         if(linkDelays_)
andrewm@0:         {
andrewm@0:             // Keep L and R delays equal, setting them to be if they aren't already
andrewm@0:             PingPongDelayAudioProcessor* ourProcessor = getProcessor();
andrewm@0:             
andrewm@0:             delayLengthRightSlider_.setValue(ourProcessor->delayLengthLeft_, dontSendNotification);
andrewm@0:             ourProcessor->setParameterNotifyingHost(PingPongDelayAudioProcessor::kDelayLengthRightParam,
andrewm@0:                                                     ourProcessor->delayLengthLeft_);
andrewm@0:         }
andrewm@0:     }
andrewm@0:     else if(button == &reverseChannelsButton_)
andrewm@0:     {
andrewm@0:         bool reverse = button->getToggleState();
andrewm@0:         
andrewm@0:         if(reverse)
andrewm@0:             getProcessor()->setParameterNotifyingHost(PingPongDelayAudioProcessor::kReverseChannelsParam, 1.0);
andrewm@0:         else
andrewm@0:             getProcessor()->setParameterNotifyingHost(PingPongDelayAudioProcessor::kReverseChannelsParam, 0.0);
andrewm@0:     }
andrewm@0: }