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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 Empty: template for an effect; passes input to output unmodified
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10 See textbook Chapter 13: Building Audio Effect Plug-Ins
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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 EmptyAudioProcessorEditor::EmptyAudioProcessorEditor (EmptyAudioProcessor* ownerFilter)
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36 : AudioProcessorEditor (ownerFilter),
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37 volumeLabel_("", "Volume:"),
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38 volumeSlider_("volume")
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39 {
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40 // This is where our plugin's editor size is set.
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41 // setSize(170, 80);
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42
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43 // Set up the sliders
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44 addAndMakeVisible(&volumeSlider_);
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45 volumeSlider_.setSliderStyle(Slider::Rotary);
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46 volumeSlider_.addListener(this);
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47 volumeSlider_.setRange(0.0, 2.0, 0.01);
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48
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49 volumeLabel_.attachToComponent(&volumeSlider_, false);
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50 volumeLabel_.setFont(Font (11.0f));
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51
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52 // add the triangular resizer component for the bottom-right of the UI
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53 addAndMakeVisible(resizer_ = new ResizableCornerComponent (this, &resizeLimits_));
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54 resizeLimits_.setSizeLimits(170, 100, 400, 160);
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55
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56 // set our component's initial size to be the last one that was stored in the filter's settings
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57 setSize(ownerFilter->lastUIWidth_,
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58 ownerFilter->lastUIHeight_);
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59
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60 startTimer(50);
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61 }
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62
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63 EmptyAudioProcessorEditor::~EmptyAudioProcessorEditor()
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64 {
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65 }
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66
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67 //==============================================================================
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68 void EmptyAudioProcessorEditor::paint (Graphics& g)
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69 {
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70 g.fillAll (Colours::grey);
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71 }
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72
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73 void EmptyAudioProcessorEditor::resized()
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74 {
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75 volumeSlider_.setBounds(20, 20, 150, 40);
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76
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77 resizer_->setBounds(getWidth() - 16, getHeight() - 16, 16, 16);
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78
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79 getProcessor()->lastUIWidth_ = getWidth();
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80 getProcessor()->lastUIHeight_ = getHeight();
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81 }
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82
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83 //==============================================================================
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84 // This timer periodically checks whether any of the filter's parameters have changed...
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85 void EmptyAudioProcessorEditor::timerCallback()
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86 {
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87 EmptyAudioProcessor* ourProcessor = getProcessor();
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88
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89 volumeSlider_.setValue(ourProcessor->volume_, dontSendNotification);
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90 }
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91
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92 // This is our Slider::Listener callback, when the user drags a slider.
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93 void EmptyAudioProcessorEditor::sliderValueChanged (Slider* slider)
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94 {
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95 if (slider == &volumeSlider_)
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96 {
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97 // It's vital to use setParameterNotifyingHost to change any parameters that are automatable
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98 // by the host, rather than just modifying them directly, otherwise the host won't know
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99 // that they've changed.
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100 getProcessor()->setParameterNotifyingHost (EmptyAudioProcessor::kVolumeParam,
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101 (float)volumeSlider_.getValue());
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102 }
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103 } |
