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1 /*
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2 This code accompanies the textbook:
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3
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4 Digital Audio Effects: Theory, Implementation and Application
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5 Joshua D. Reiss and Andrew P. McPherson
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6
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7 ---
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8
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9 Phaser: phasing effect using time-varying allpass filters
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10 See textbook Chapter 4: Filter Effects
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11
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12 Code by Andrew McPherson, Brecht De Man and Joshua Reiss
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13
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14 ---
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15
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16 This program is free software: you can redistribute it and/or modify
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17 it under the terms of the GNU General Public License as published by
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18 the Free Software Foundation, either version 3 of the License, or
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19 (at your option) any later version.
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20
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21 This program is distributed in the hope that it will be useful,
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22 but WITHOUT ANY WARRANTY; without even the implied warranty of
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23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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24 GNU General Public License for more details.
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25
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26 You should have received a copy of the GNU General Public License
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27 along with this program. If not, see <http://www.gnu.org/licenses/>.
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28 */
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29
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30 #include "PluginProcessor.h"
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31 #include "PluginEditor.h"
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32
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33
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34 //==============================================================================
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35 PhaserAudioProcessorEditor::PhaserAudioProcessorEditor (PhaserAudioProcessor* ownerFilter)
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36 : AudioProcessorEditor (ownerFilter),
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37 baseFrequencyLabel_("", "Base Frequency (Hz):"),
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38 sweepWidthLabel_("", "Sweep Width (Hz):"),
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39 depthLabel_("", "Depth:"),
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40 feedbackLabel_("", "Feedback:"),
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41 lfoFrequencyLabel_("", "LFO Frequency:"),
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42 waveformLabel_("", "LFO Waveform:"),
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43 filtersLabel_("", "Number of Filters:")
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44 {
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45
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46 // Set up the sliders
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47 addAndMakeVisible (&baseFrequencySlider_);
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48 baseFrequencySlider_.setSliderStyle (Slider::Rotary);
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49 baseFrequencySlider_.addListener (this);
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50 baseFrequencySlider_.setRange (50.0, 1000.0, 0.5);
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51
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52 addAndMakeVisible (&sweepWidthSlider_);
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53 sweepWidthSlider_.setSliderStyle (Slider::Rotary);
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54 sweepWidthSlider_.addListener (this);
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55 sweepWidthSlider_.setRange (50.0, 5000.0, 0.5);
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56
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57 addAndMakeVisible (&depthSlider_);
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58 depthSlider_.setSliderStyle (Slider::Rotary);
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59 depthSlider_.addListener (this);
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60 depthSlider_.setRange (0.0, 1.0, 0.01);
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61
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62 addAndMakeVisible (&feedbackSlider_);
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63 feedbackSlider_.setSliderStyle (Slider::Rotary);
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64 feedbackSlider_.addListener (this);
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65 feedbackSlider_.setRange (0.0, 0.99, 0.01);
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66
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67 addAndMakeVisible (&lfoFrequencySlider_);
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68 lfoFrequencySlider_.setSliderStyle (Slider::Rotary);
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69 lfoFrequencySlider_.addListener (this);
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70 lfoFrequencySlider_.setRange (0.05, 2.0, 0.025);
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71
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72 addAndMakeVisible(&waveformComboBox_);
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73 waveformComboBox_.setEditableText(false);
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74 waveformComboBox_.setJustificationType(Justification::left);
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75 waveformComboBox_.addItem("Sine", PhaserAudioProcessor::kWaveformSine);
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76 waveformComboBox_.addItem("Triangle", PhaserAudioProcessor::kWaveformTriangle);
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77 waveformComboBox_.addItem("Square", PhaserAudioProcessor::kWaveformSquare);
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78 waveformComboBox_.addItem("Sawtooth", PhaserAudioProcessor::kWaveformSawtooth);
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79 waveformComboBox_.addListener(this);
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80
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81 addAndMakeVisible(&filtersComboBox_);
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82 filtersComboBox_.setEditableText(false);
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83 filtersComboBox_.setJustificationType(Justification::left);
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84 filtersComboBox_.addItem("2", 2);
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85 filtersComboBox_.addItem("4", 4);
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86 filtersComboBox_.addItem("6", 6);
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87 filtersComboBox_.addItem("8", 8);
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88 filtersComboBox_.addItem("10", 10);
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89 filtersComboBox_.addListener(this);
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90
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91 addAndMakeVisible(&stereoToggleButton_);
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92 stereoToggleButton_.setName("Stereo");
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93 stereoToggleButton_.setButtonText("Stereo");
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94 stereoToggleButton_.addListener(this);
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95
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96 baseFrequencyLabel_.attachToComponent(&baseFrequencySlider_, false);
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97 baseFrequencyLabel_.setFont(Font (11.0f));
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98
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99 sweepWidthLabel_.attachToComponent(&sweepWidthSlider_, false);
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100 sweepWidthLabel_.setFont(Font (11.0f));
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101
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102 depthLabel_.attachToComponent(&depthSlider_, false);
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103 depthLabel_.setFont(Font (11.0f));
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104
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105 feedbackLabel_.attachToComponent(&feedbackSlider_, false);
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106 feedbackLabel_.setFont(Font (11.0f));
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107
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108 lfoFrequencyLabel_.attachToComponent(&lfoFrequencySlider_, false);
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109 lfoFrequencyLabel_.setFont(Font (11.0f));
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110
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111 waveformLabel_.attachToComponent(&waveformComboBox_, false);
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112 waveformLabel_.setFont(Font (11.0f));
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113
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114 filtersLabel_.attachToComponent(&filtersComboBox_, false);
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115 filtersLabel_.setFont(Font (11.0f));
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116
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117 // add the triangular resizer component for the bottom-right of the UI
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118 addAndMakeVisible(resizer_ = new ResizableCornerComponent (this, &resizeLimits_));
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119 resizeLimits_.setSizeLimits(550, 200, 600, 300);
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120
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121 // set our component's initial size to be the last one that was stored in the filter's settings
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122 setSize(ownerFilter->lastUIWidth_,
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123 ownerFilter->lastUIHeight_);
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124
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125 startTimer(50);
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126 }
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127
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128 PhaserAudioProcessorEditor::~PhaserAudioProcessorEditor()
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129 {
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130 }
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131
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132 //==============================================================================
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133 void PhaserAudioProcessorEditor::paint (Graphics& g)
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134 {
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135 g.fillAll (Colours::grey);
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136 }
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137
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138 void PhaserAudioProcessorEditor::resized()
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139 {
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140 baseFrequencySlider_.setBounds (20, 20, 150, 40);
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141 sweepWidthSlider_.setBounds (200, 20, 150, 40);
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142 depthSlider_.setBounds(380, 20, 150, 40);
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143 feedbackSlider_.setBounds(20, 80, 150, 40);
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144 lfoFrequencySlider_.setBounds(200, 80, 150, 40);
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145 waveformComboBox_.setBounds(20, 140, 200, 30);
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146 filtersComboBox_.setBounds(250, 140, 200, 30);
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147 stereoToggleButton_.setBounds(380, 80, 150, 40);
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148 stereoToggleButton_.changeWidthToFitText();
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149
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150 resizer_->setBounds(getWidth() - 16, getHeight() - 16, 16, 16);
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151
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152 getProcessor()->lastUIWidth_ = getWidth();
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153 getProcessor()->lastUIHeight_ = getHeight();
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154 }
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155
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156 //==============================================================================
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157 // This timer periodically checks whether any of the filter's parameters have changed...
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158 void PhaserAudioProcessorEditor::timerCallback()
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159 {
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160 PhaserAudioProcessor* ourProcessor = getProcessor();
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161
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162 baseFrequencySlider_.setValue(ourProcessor->baseFrequency_, dontSendNotification);
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163 sweepWidthSlider_.setValue(ourProcessor->sweepWidth_, dontSendNotification);
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164 depthSlider_.setValue(ourProcessor->depth_, dontSendNotification);
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165 feedbackSlider_.setValue(ourProcessor->feedback_, dontSendNotification);
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166 lfoFrequencySlider_.setValue(ourProcessor->lfoFrequency_, dontSendNotification);
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167 waveformComboBox_.setSelectedId(ourProcessor->waveform_, dontSendNotification);
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168 filtersComboBox_.setSelectedId(ourProcessor->filtersPerChannel_, dontSendNotification);
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169 stereoToggleButton_.setToggleState((ourProcessor->stereo_ != 0), dontSendNotification);
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170 }
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171
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172 // This is our Slider::Listener callback, when the user drags a slider.
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173 void PhaserAudioProcessorEditor::sliderValueChanged (Slider* slider)
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174 {
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175 // It's vital to use setParameterNotifyingHost to change any parameters that are automatable
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176 // by the host, rather than just modifying them directly, otherwise the host won't know
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177 // that they've changed.
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178
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179 if (slider == &baseFrequencySlider_)
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180 {
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181 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kBaseFrequencyParam,
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182 (float)baseFrequencySlider_.getValue());
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183 }
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184 else if (slider == &sweepWidthSlider_)
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185 {
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186 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kSweepWidthParam,
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187 (float)sweepWidthSlider_.getValue());
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188 }
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189 else if (slider == &depthSlider_)
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190 {
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191 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kDepthParam,
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192 (float)depthSlider_.getValue());
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193 }
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194 else if (slider == &feedbackSlider_)
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195 {
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196 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kFeedbackParam,
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197 (float)feedbackSlider_.getValue());
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198 }
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199 else if (slider == &lfoFrequencySlider_)
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200 {
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201 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kLFOFrequencyParam,
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202 (float)lfoFrequencySlider_.getValue());
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203 }
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204 }
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205
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206 // Similar callback to sliderValueChanged for ComboBox updates
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207 void PhaserAudioProcessorEditor::comboBoxChanged (ComboBox *comboBox)
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208 {
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209 if(comboBox == &waveformComboBox_)
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210 {
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211 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kWaveformParam,
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212 (float)waveformComboBox_.getSelectedId());
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213 }
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214 else if(comboBox == &filtersComboBox_)
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215 {
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216 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kFiltersParam,
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217 (float)filtersComboBox_.getSelectedId());
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218 }
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219 }
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220
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221 // Callback for toggle button
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222 void PhaserAudioProcessorEditor::buttonClicked (Button *button)
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223 {
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224 if(button == &stereoToggleButton_)
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225 {
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226 if(button->getToggleState())
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227 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kStereoParam, 1.0);
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228 else
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229 getProcessor()->setParameterNotifyingHost (PhaserAudioProcessor::kStereoParam, 0.0);
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230 }
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231 } |