diff effects/flanger/Source/PluginEditor.cpp @ 0:e32fe563e124

First commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/effects/flanger/Source/PluginEditor.cpp	Fri Oct 10 15:41:23 2014 +0100
@@ -0,0 +1,229 @@
+/*
+  This code accompanies the textbook:
+ 
+  Digital Audio Effects: Theory, Implementation and Application
+  Joshua D. Reiss and Andrew P. McPherson
+ 
+  ---
+ 
+  Flanger: flanging effect using time-varying delay
+  See textbook Chapter 2: Delay Line Effects
+ 
+  Code by Andrew McPherson, Brecht De Man and Joshua Reiss
+ 
+  ---
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+ 
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "PluginProcessor.h"
+#include "PluginEditor.h"
+
+
+//==============================================================================
+FlangerAudioProcessorEditor::FlangerAudioProcessorEditor (FlangerAudioProcessor* ownerFilter)
+    : AudioProcessorEditor (ownerFilter),
+      delayLabel_("", "Min. Delay (sec):"),
+      sweepWidthLabel_("", "Sweep Width (sec.):"),
+      depthLabel_("", "Depth:"),
+      feedbackLabel_("", "Feedback:"),
+      frequencyLabel_("", "LFO Frequency:"),
+      waveformLabel_("", "LFO Waveform:"),
+      interpolationLabel_("", "Interpolation Type:")
+{
+
+    // Set up the sliders
+    addAndMakeVisible (&delaySlider_);
+    delaySlider_.setSliderStyle (Slider::Rotary);
+    delaySlider_.addListener (this);
+    delaySlider_.setRange (0.001, FlangerAudioProcessor::kMaximumDelay, 0.0005);
+    
+    addAndMakeVisible (&sweepWidthSlider_);
+    sweepWidthSlider_.setSliderStyle (Slider::Rotary);
+    sweepWidthSlider_.addListener (this);
+    sweepWidthSlider_.setRange (.001, FlangerAudioProcessor::kMaximumSweepWidth, 0.0005);
+    
+    addAndMakeVisible (&depthSlider_);
+    depthSlider_.setSliderStyle (Slider::Rotary);
+    depthSlider_.addListener (this);
+    depthSlider_.setRange (0.0, 1.0, 0.01);
+    
+    addAndMakeVisible (&feedbackSlider_);
+    feedbackSlider_.setSliderStyle (Slider::Rotary);
+    feedbackSlider_.addListener (this);
+    feedbackSlider_.setRange (0.0, 0.5, 0.01);
+    
+    addAndMakeVisible (&frequencySlider_);
+    frequencySlider_.setSliderStyle (Slider::Rotary);
+    frequencySlider_.addListener (this);
+    frequencySlider_.setRange (0.05, 2.0, 0.025);
+    
+    addAndMakeVisible(&waveformComboBox_);
+    waveformComboBox_.setEditableText(false);
+    waveformComboBox_.setJustificationType(Justification::left);
+    waveformComboBox_.addItem("Sine", FlangerAudioProcessor::kWaveformSine);
+    waveformComboBox_.addItem("Triangle", FlangerAudioProcessor::kWaveformTriangle);
+    waveformComboBox_.addItem("Square", FlangerAudioProcessor::kWaveformSquare);
+    waveformComboBox_.addItem("Sawtooth", FlangerAudioProcessor::kWaveformSawtooth);
+    waveformComboBox_.addListener(this);
+    
+    addAndMakeVisible(&interpolationComboBox_);
+    interpolationComboBox_.setEditableText(false);
+    interpolationComboBox_.setJustificationType(Justification::left);
+    interpolationComboBox_.addItem("None", FlangerAudioProcessor::kInterpolationNearestNeighbour);
+    interpolationComboBox_.addItem("Linear", FlangerAudioProcessor::kInterpolationLinear);
+    interpolationComboBox_.addItem("Cubic", FlangerAudioProcessor::kInterpolationCubic);
+    interpolationComboBox_.addListener(this);
+    
+    addAndMakeVisible(&stereoToggleButton_);
+    stereoToggleButton_.setName("Stereo");
+    stereoToggleButton_.setButtonText("Stereo");
+    stereoToggleButton_.addListener(this);
+    
+    delayLabel_.attachToComponent(&delaySlider_, false);
+    delayLabel_.setFont(Font (11.0f));
+    
+    sweepWidthLabel_.attachToComponent(&sweepWidthSlider_, false);
+    sweepWidthLabel_.setFont(Font (11.0f));
+    
+    depthLabel_.attachToComponent(&depthSlider_, false);
+    depthLabel_.setFont(Font (11.0f));
+    
+    feedbackLabel_.attachToComponent(&feedbackSlider_, false);
+    feedbackLabel_.setFont(Font (11.0f));
+
+    frequencyLabel_.attachToComponent(&frequencySlider_, false);
+    frequencyLabel_.setFont(Font (11.0f));
+    
+    waveformLabel_.attachToComponent(&waveformComboBox_, false);
+    waveformLabel_.setFont(Font (11.0f));
+    
+    interpolationLabel_.attachToComponent(&interpolationComboBox_, false);
+    interpolationLabel_.setFont(Font (11.0f));
+    
+    // add the triangular resizer component for the bottom-right of the UI
+    addAndMakeVisible(resizer_ = new ResizableCornerComponent (this, &resizeLimits_));
+    resizeLimits_.setSizeLimits(550, 200, 600, 300);
+    
+    // set our component's initial size to be the last one that was stored in the filter's settings
+    setSize(ownerFilter->lastUIWidth_,
+            ownerFilter->lastUIHeight_);
+    
+    startTimer(50);
+}
+
+FlangerAudioProcessorEditor::~FlangerAudioProcessorEditor()
+{
+}
+
+//==============================================================================
+void FlangerAudioProcessorEditor::paint (Graphics& g)
+{
+    g.fillAll (Colours::grey);
+}
+
+void FlangerAudioProcessorEditor::resized()
+{
+    delaySlider_.setBounds (20, 20, 150, 40);
+    sweepWidthSlider_.setBounds (200, 20, 150, 40);
+    depthSlider_.setBounds(380, 20, 150, 40);
+    feedbackSlider_.setBounds(20, 80, 150, 40);
+    frequencySlider_.setBounds(200, 80, 150, 40);
+    waveformComboBox_.setBounds(20, 140, 200, 30);
+    interpolationComboBox_.setBounds(250, 140, 200, 30);
+    stereoToggleButton_.setBounds(380, 80, 150, 40);
+    stereoToggleButton_.changeWidthToFitText();
+    
+    resizer_->setBounds(getWidth() - 16, getHeight() - 16, 16, 16);
+    
+    getProcessor()->lastUIWidth_ = getWidth();
+    getProcessor()->lastUIHeight_ = getHeight();
+}
+
+//==============================================================================
+// This timer periodically checks whether any of the filter's parameters have changed...
+void FlangerAudioProcessorEditor::timerCallback()
+{
+    FlangerAudioProcessor* ourProcessor = getProcessor();
+    
+    delaySlider_.setValue(ourProcessor->delay_, dontSendNotification);
+    sweepWidthSlider_.setValue(ourProcessor->sweepWidth_, dontSendNotification);
+    depthSlider_.setValue(ourProcessor->depth_, dontSendNotification);
+    feedbackSlider_.setValue(ourProcessor->feedback_, dontSendNotification);
+    frequencySlider_.setValue(ourProcessor->frequency_, dontSendNotification);
+    waveformComboBox_.setSelectedId(ourProcessor->waveform_, false);
+    interpolationComboBox_.setSelectedId(ourProcessor->interpolation_, false);
+    stereoToggleButton_.setToggleState((ourProcessor->stereo_ != 0), false);
+}
+
+// This is our Slider::Listener callback, when the user drags a slider.
+void FlangerAudioProcessorEditor::sliderValueChanged (Slider* slider)
+{
+    // It's vital to use setParameterNotifyingHost to change any parameters that are automatable
+    // by the host, rather than just modifying them directly, otherwise the host won't know
+    // that they've changed.
+    
+    if (slider == &delaySlider_)
+    {
+        getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kDelayParam,
+                                                   (float)delaySlider_.getValue());
+    }
+    else if (slider == &sweepWidthSlider_)
+    {
+        getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kSweepWidthParam,
+                                                   (float)sweepWidthSlider_.getValue());
+    }
+    else if (slider == &depthSlider_)
+    {
+        getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kDepthParam,
+                                                   (float)depthSlider_.getValue());
+    }
+    else if (slider == &feedbackSlider_)
+    {
+        getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kFeedbackParam,
+                                                   (float)feedbackSlider_.getValue());
+    }
+    else if (slider == &frequencySlider_)
+    {
+        getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kFrequencyParam,
+                                                   (float)frequencySlider_.getValue());
+    }
+}
+
+// Similar callback to sliderValueChanged for ComboBox updates
+void FlangerAudioProcessorEditor::comboBoxChanged (ComboBox *comboBox)
+{
+    if(comboBox == &waveformComboBox_)
+    {
+        getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kWaveformParam,
+                                                   (float)waveformComboBox_.getSelectedId());
+    }
+    else if(comboBox == &interpolationComboBox_)
+    {
+        getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kInterpolationParam,
+                                                   (float)interpolationComboBox_.getSelectedId());
+    }
+}
+
+// Callback for toggle button
+void FlangerAudioProcessorEditor::buttonClicked (Button *button)
+{
+    if(button == &stereoToggleButton_)
+    {
+        if(button->getToggleState())
+            getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kStereoParam, 1.0);
+        else
+            getProcessor()->setParameterNotifyingHost (FlangerAudioProcessor::kStereoParam, 0.0);
+    }
+}
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