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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2015 - ROLI Ltd.
Permission is granted to use this software under the terms of either:
a) the GPL v2 (or any later version)
b) the Affero GPL v3
Details of these licenses can be found at: www.gnu.org/licenses
JUCE 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.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.juce.com for more information.
==============================================================================
*/
class ProcessorParameterPropertyComp : public PropertyComponent,
private AudioProcessorListener,
private Timer
{
public:
ProcessorParameterPropertyComp (const String& name, AudioProcessor& p, int paramIndex)
: PropertyComponent (name),
owner (p),
index (paramIndex),
paramHasChanged (false),
slider (p, paramIndex)
{
startTimer (100);
addAndMakeVisible (slider);
owner.addListener (this);
}
~ProcessorParameterPropertyComp()
{
owner.removeListener (this);
}
void refresh() override
{
paramHasChanged = false;
if (slider.getThumbBeingDragged() < 0)
slider.setValue (owner.getParameter (index), dontSendNotification);
slider.updateText();
}
void audioProcessorChanged (AudioProcessor*) override {}
void audioProcessorParameterChanged (AudioProcessor*, int parameterIndex, float) override
{
if (parameterIndex == index)
paramHasChanged = true;
}
void timerCallback() override
{
if (paramHasChanged)
{
refresh();
startTimerHz (50);
}
else
{
startTimer (jmin (1000 / 4, getTimerInterval() + 10));
}
}
private:
//==============================================================================
class ParamSlider : public Slider
{
public:
ParamSlider (AudioProcessor& p, int paramIndex) : owner (p), index (paramIndex)
{
const int steps = owner.getParameterNumSteps (index);
if (steps > 1 && steps < 0x7fffffff)
setRange (0.0, 1.0, 1.0 / (steps - 1.0));
else
setRange (0.0, 1.0);
setSliderStyle (Slider::LinearBar);
setTextBoxIsEditable (false);
setScrollWheelEnabled (true);
}
void valueChanged() override
{
const float newVal = (float) getValue();
if (owner.getParameter (index) != newVal)
{
owner.setParameterNotifyingHost (index, newVal);
updateText();
}
}
void startedDragging() override
{
owner.beginParameterChangeGesture(index);
}
void stoppedDragging() override
{
owner.endParameterChangeGesture(index);
}
String getTextFromValue (double /*value*/) override
{
return owner.getParameterText (index) + " " + owner.getParameterLabel (index).trimEnd();
}
private:
//==============================================================================
AudioProcessor& owner;
const int index;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ParamSlider)
};
AudioProcessor& owner;
const int index;
bool volatile paramHasChanged;
ParamSlider slider;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ProcessorParameterPropertyComp)
};
//==============================================================================
GenericAudioProcessorEditor::GenericAudioProcessorEditor (AudioProcessor* const p)
: AudioProcessorEditor (p)
{
jassert (p != nullptr);
setOpaque (true);
addAndMakeVisible (panel);
Array <PropertyComponent*> params;
const int numParams = p->getNumParameters();
int totalHeight = 0;
for (int i = 0; i < numParams; ++i)
{
String name (p->getParameterName (i));
if (name.trim().isEmpty())
name = "Unnamed";
ProcessorParameterPropertyComp* const pc = new ProcessorParameterPropertyComp (name, *p, i);
params.add (pc);
totalHeight += pc->getPreferredHeight();
}
panel.addProperties (params);
setSize (400, jlimit (25, 400, totalHeight));
}
GenericAudioProcessorEditor::~GenericAudioProcessorEditor()
{
}
void GenericAudioProcessorEditor::paint (Graphics& g)
{
g.fillAll (Colours::white);
}
void GenericAudioProcessorEditor::resized()
{
panel.setBounds (getLocalBounds());
}
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