annotate effects/parametriceq/Source/PluginEditor.cpp @ 1:04e171d2a747 tip

JUCE 4 compatible. Standardised paths on Mac: modules '../../juce/modules'; VST folder '~/SDKs/vstsdk2.4' (JUCE default). Replaced deprecated 'getSampleData(channel)'; getToggleState(...); setToggleState(...); setSelectedId(...). Removed unused variables. Ignore JUCE code and build files.
author Brecht De Man <b.deman@qmul.ac.uk>
date Sun, 22 Nov 2015 15:23:40 +0000
parents e32fe563e124
children
rev   line source
andrewm@0 1 /*
andrewm@0 2 This code accompanies the textbook:
andrewm@0 3
andrewm@0 4 Digital Audio Effects: Theory, Implementation and Application
andrewm@0 5 Joshua D. Reiss and Andrew P. McPherson
andrewm@0 6
andrewm@0 7 ---
andrewm@0 8
andrewm@0 9 Parametric EQ: parametric equaliser adjusting frequency, Q and gain
andrewm@0 10 See textbook Chapter 4: Filter Effects
andrewm@0 11
andrewm@0 12 Code by Andrew McPherson, Brecht De Man and Joshua Reiss
andrewm@0 13
andrewm@0 14 ---
andrewm@0 15
andrewm@0 16 This program is free software: you can redistribute it and/or modify
andrewm@0 17 it under the terms of the GNU General Public License as published by
andrewm@0 18 the Free Software Foundation, either version 3 of the License, or
andrewm@0 19 (at your option) any later version.
andrewm@0 20
andrewm@0 21 This program is distributed in the hope that it will be useful,
andrewm@0 22 but WITHOUT ANY WARRANTY; without even the implied warranty of
andrewm@0 23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
andrewm@0 24 GNU General Public License for more details.
andrewm@0 25
andrewm@0 26 You should have received a copy of the GNU General Public License
andrewm@0 27 along with this program. If not, see <http://www.gnu.org/licenses/>.
andrewm@0 28 */
andrewm@0 29
andrewm@0 30 #include "PluginProcessor.h"
andrewm@0 31 #include "PluginEditor.h"
andrewm@0 32 #include <cstring>
andrewm@0 33
andrewm@0 34 #ifdef _MSC_VER
andrewm@0 35 #define snprintf _snprintf_s //support for pre-2014 versions of Visual Studio
andrewm@0 36 #endif // _MSC_VER
andrewm@0 37
andrewm@0 38 //==============================================================================
andrewm@0 39 ParametricEQAudioProcessorEditor::ParametricEQAudioProcessorEditor (ParametricEQAudioProcessor* ownerFilter)
andrewm@0 40 : AudioProcessorEditor (ownerFilter),
andrewm@0 41 centreFrequencyLabel_("", "Centre frequency (Hz):"),
andrewm@0 42 qLabel_("", "Q:"),
andrewm@0 43 gainDecibelsLabel_("", "Gain (dB):"),
andrewm@0 44 bandwidthLabel_("", "Bandwidth:")
andrewm@0 45 {
andrewm@0 46 // Set up the sliders
andrewm@0 47
andrewm@0 48 addAndMakeVisible(&centreFrequencySlider_);
andrewm@0 49 centreFrequencySlider_.setSliderStyle(Slider::Rotary);
andrewm@0 50 centreFrequencySlider_.addListener(this);
andrewm@0 51 centreFrequencySlider_.setRange(10.0, 20000.0, 0.1);
andrewm@0 52
andrewm@0 53 // Make the centre frequency slider (approximately) logarithmic for a
andrewm@0 54 // more natural feel
andrewm@0 55 centreFrequencySlider_.setSkewFactorFromMidPoint(sqrt(10.0 * 20000.0));
andrewm@0 56
andrewm@0 57 addAndMakeVisible(&qSlider_);
andrewm@0 58 qSlider_.setSliderStyle(Slider::Rotary);
andrewm@0 59 qSlider_.addListener(this);
andrewm@0 60 qSlider_.setRange(0.1, 20.0, 0.01);
andrewm@0 61
andrewm@0 62 addAndMakeVisible(&gainDecibelsSlider_);
andrewm@0 63 gainDecibelsSlider_.setSliderStyle(Slider::Rotary);
andrewm@0 64 gainDecibelsSlider_.addListener(this);
andrewm@0 65 gainDecibelsSlider_.setRange(-12.0, 12.0, 0.1);
andrewm@0 66
andrewm@0 67 // This label is informational and exists apart from other controls
andrewm@0 68 // The other labels are attached to sliders and combo boxes
andrewm@0 69 addAndMakeVisible(&bandwidthLabel_);
andrewm@0 70 bandwidthLabel_.setFont(Font (12.0f));
andrewm@0 71
andrewm@0 72 centreFrequencyLabel_.attachToComponent(&centreFrequencySlider_, false);
andrewm@0 73 centreFrequencyLabel_.setFont(Font (11.0f));
andrewm@0 74
andrewm@0 75 qLabel_.attachToComponent(&qSlider_, false);
andrewm@0 76 qLabel_.setFont(Font (11.0f));
andrewm@0 77
andrewm@0 78 gainDecibelsLabel_.attachToComponent(&gainDecibelsSlider_, false);
andrewm@0 79 gainDecibelsLabel_.setFont(Font (11.0f));
andrewm@0 80
andrewm@0 81 // add the triangular resizer component for the bottom-right of the UI
andrewm@0 82 addAndMakeVisible(resizer_ = new ResizableCornerComponent (this, &resizeLimits_));
andrewm@0 83 resizeLimits_.setSizeLimits(550, 100, 550, 160);
andrewm@0 84
andrewm@0 85 // set our component's initial size to be the last one that was stored in the filter's settings
andrewm@0 86 setSize(ownerFilter->lastUIWidth_,
andrewm@0 87 ownerFilter->lastUIHeight_);
andrewm@0 88
andrewm@0 89 startTimer(50);
andrewm@0 90 }
andrewm@0 91
andrewm@0 92 ParametricEQAudioProcessorEditor::~ParametricEQAudioProcessorEditor()
andrewm@0 93 {
andrewm@0 94 }
andrewm@0 95
andrewm@0 96 //==============================================================================
andrewm@0 97 void ParametricEQAudioProcessorEditor::paint (Graphics& g)
andrewm@0 98 {
andrewm@0 99 g.fillAll (Colours::grey);
andrewm@0 100 }
andrewm@0 101
andrewm@0 102 void ParametricEQAudioProcessorEditor::resized()
andrewm@0 103 {
andrewm@0 104 centreFrequencySlider_.setBounds(20, 20, 150, 40);
andrewm@0 105 qSlider_.setBounds(200, 20, 150, 40);
andrewm@0 106 gainDecibelsSlider_.setBounds(380, 20, 150, 40);
andrewm@0 107 bandwidthLabel_.setBounds(20, 70, 350, 20);
andrewm@0 108
andrewm@0 109 resizer_->setBounds(getWidth() - 16, getHeight() - 16, 16, 16);
andrewm@0 110
andrewm@0 111 getProcessor()->lastUIWidth_ = getWidth();
andrewm@0 112 getProcessor()->lastUIHeight_ = getHeight();
andrewm@0 113 }
andrewm@0 114
andrewm@0 115 //==============================================================================
andrewm@0 116 // This timer periodically checks whether any of the filter's parameters have changed...
andrewm@0 117 void ParametricEQAudioProcessorEditor::timerCallback()
andrewm@0 118 {
andrewm@0 119 ParametricEQAudioProcessor* ourProcessor = getProcessor();
andrewm@0 120
andrewm@0 121 centreFrequencySlider_.setValue(ourProcessor->centreFrequency_, dontSendNotification);
andrewm@0 122 qSlider_.setValue(ourProcessor->q_, dontSendNotification);
andrewm@0 123 gainDecibelsSlider_.setValue(ourProcessor->gainDecibels_, dontSendNotification);
andrewm@0 124 updateBandwidthLabel();
andrewm@0 125 }
andrewm@0 126
andrewm@0 127 // This is our Slider::Listener callback, when the user drags a slider.
andrewm@0 128 void ParametricEQAudioProcessorEditor::sliderValueChanged (Slider* slider)
andrewm@0 129 {
andrewm@0 130 // It's vital to use setParameterNotifyingHost to change any parameters that are automatable
andrewm@0 131 // by the host, rather than just modifying them directly, otherwise the host won't know
andrewm@0 132 // that they've changed.
andrewm@0 133
andrewm@0 134 if (slider == &centreFrequencySlider_)
andrewm@0 135 {
andrewm@0 136 getProcessor()->setParameterNotifyingHost (ParametricEQAudioProcessor::kCentreFrequencyParam,
andrewm@0 137 (float)centreFrequencySlider_.getValue());
andrewm@0 138 updateBandwidthLabel();
andrewm@0 139 }
andrewm@0 140 else if (slider == &qSlider_)
andrewm@0 141 {
andrewm@0 142 getProcessor()->setParameterNotifyingHost (ParametricEQAudioProcessor::kQParam,
andrewm@0 143 (float)qSlider_.getValue());
andrewm@0 144 updateBandwidthLabel();
andrewm@0 145 }
andrewm@0 146 else if (slider == &gainDecibelsSlider_)
andrewm@0 147 {
andrewm@0 148 getProcessor()->setParameterNotifyingHost (ParametricEQAudioProcessor::kGainDecibelsParam,
andrewm@0 149 (float)gainDecibelsSlider_.getValue());
andrewm@0 150 }
andrewm@0 151 }
andrewm@0 152
andrewm@0 153 void ParametricEQAudioProcessorEditor::updateBandwidthLabel()
andrewm@0 154 {
andrewm@0 155 char str[64];
andrewm@0 156 ParametricEQAudioProcessor* ourProcessor = getProcessor();
andrewm@0 157
andrewm@0 158 snprintf(str, 64, "Bandwidth: %.1f Hz", ourProcessor->centreFrequency_ / ourProcessor->q_);
andrewm@0 159
andrewm@0 160 bandwidthLabel_.setText(str, dontSendNotification);
andrewm@0 161 }