juce/source/src/audio/processors/juce_GenericAudioProcessorEditor.cpp

   1 /*
   2   ==============================================================================
   3
   4    This file is part of the JUCE library - "Jules' Utility Class Extensions"
   5    Copyright 2004-11 by Raw Material Software Ltd.
   6
   7   ------------------------------------------------------------------------------
   8
   9    JUCE can be redistributed and/or modified under the terms of the GNU General
  10    Public License (Version 2), as published by the Free Software Foundation.
  11    A copy of the license is included in the JUCE distribution, or can be found
  12    online at www.gnu.org/licenses.
  13
  14    JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
  15    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  16    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  17
  18   ------------------------------------------------------------------------------
  19
  20    To release a closed-source product which uses JUCE, commercial licenses are
  21    available: visit www.rawmaterialsoftware.com/juce for more information.
  22
  23   ==============================================================================
  24 */
  25
  26 #include "../../core/juce_StandardHeader.h"
  27
  28 BEGIN_JUCE_NAMESPACE
  29
  30 #include "juce_GenericAudioProcessorEditor.h"
  31 #include "juce_AudioProcessor.h"
  32 #include "../../gui/components/controls/juce_Slider.h"
  33
  34
  35 //==============================================================================
  36 class ProcessorParameterPropertyComp   : public PropertyComponent,
  37                                          public AudioProcessorListener,
  38                                          public Timer
  39 {
  40 public:
  41     ProcessorParameterPropertyComp (const String& name, AudioProcessor& owner_, const int index_)
  42         : PropertyComponent (name),
  43           owner (owner_),
  44           index (index_),
  45           paramHasChanged (false),
  46           slider (owner_, index_)
  47     {
  48         startTimer (100);
  49         addAndMakeVisible (&slider);
  50         owner_.addListener (this);
  51     }
  52
  53     ~ProcessorParameterPropertyComp()
  54     {
  55         owner.removeListener (this);
  56     }
  57
  58     void refresh()
  59     {
  60         paramHasChanged = false;
  61         slider.setValue (owner.getParameter (index), false);
  62     }
  63
  64     void audioProcessorChanged (AudioProcessor*)  {}
  65
  66     void audioProcessorParameterChanged (AudioProcessor*, int parameterIndex, float)
  67     {
  68         if (parameterIndex == index)
  69             paramHasChanged = true;
  70     }
  71
  72     void timerCallback()
  73     {
  74         if (paramHasChanged)
  75         {
  76             refresh();
  77             startTimer (1000 / 50);
  78         }
  79         else
  80         {
  81             startTimer (jmin (1000 / 4, getTimerInterval() + 10));
  82         }
  83     }
  84
  85 private:
  86     //==============================================================================
  87     class ParamSlider  : public Slider
  88     {
  89     public:
  90         ParamSlider (AudioProcessor& owner_, const int index_)
  91             : owner (owner_),
  92               index (index_)
  93         {
  94             setRange (0.0, 1.0, 0.0);
  95             setSliderStyle (Slider::LinearBar);
  96             setTextBoxIsEditable (false);
  97             setScrollWheelEnabled (false);
  98         }
  99
 100         void valueChanged()
 101         {
 102             const float newVal = (float) getValue();
 103
 104             if (owner.getParameter (index) != newVal)
 105                 owner.setParameter (index, newVal);
 106         }
 107
 108         const String getTextFromValue (double /*value*/)
 109         {
 110             return owner.getParameterText (index);
 111         }
 112
 113     private:
 114         //==============================================================================
 115         AudioProcessor& owner;
 116         const int index;
 117
 118         JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ParamSlider);
 119     };
 120
 121     AudioProcessor& owner;
 122     const int index;
 123     bool volatile paramHasChanged;
 124     ParamSlider slider;
 125
 126     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ProcessorParameterPropertyComp);
 127 };
 128
 129
 130 //==============================================================================
 131 GenericAudioProcessorEditor::GenericAudioProcessorEditor (AudioProcessor* const owner_)
 132     : AudioProcessorEditor (owner_)
 133 {
 134     jassert (owner_ != nullptr);
 135     setOpaque (true);
 136
 137     addAndMakeVisible (&panel);
 138
 139     Array <PropertyComponent*> params;
 140
 141     const int numParams = owner_->getNumParameters();
 142     int totalHeight = 0;
 143
 144     for (int i = 0; i < numParams; ++i)
 145     {
 146         String name (owner_->getParameterName (i));
 147         if (name.trim().isEmpty())
 148             name = "Unnamed";
 149
 150         ProcessorParameterPropertyComp* const pc = new ProcessorParameterPropertyComp (name, *owner_, i);
 151         params.add (pc);
 152         totalHeight += pc->getPreferredHeight();
 153     }
 154
 155     panel.addProperties (params);
 156
 157     setSize (400, jlimit (25, 400, totalHeight));
 158 }
 159
 160 GenericAudioProcessorEditor::~GenericAudioProcessorEditor()
 161 {
 162 }
 163
 164 void GenericAudioProcessorEditor::paint (Graphics& g)
 165 {
 166     g.fillAll (Colours::white);
 167 }
 168
 169 void GenericAudioProcessorEditor::resized()
 170 {
 171     panel.setBounds (getLocalBounds());
 172 }
 173
 174
 175 END_JUCE_NAMESPACE