Add mono toggle, wider scale dropdown, dynamic UI scaling

CMakeLists.txt

@@ -4,12 +4,17 @@ project(Terion VERSION 1.0.0 LANGUAGES C CXX)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-# Locate JUCE: prefer an explicit TERION_JUCE_DIR, then ~/JUCE, then the
+# Locate JUCE: prefer an explicit TERION_JUCE_DIR, then ~/JUCE,
-# vendored copy at third_party/JUCE (populated by `make juce`).
+# ~/.local/git/juce, ~/.local/git/JUCE, then the vendored copy at
+# third_party/JUCE (populated by `make juce`).
 if(TERION_JUCE_DIR)
     set(JUCE_DIR_SELECTED "${TERION_JUCE_DIR}")
 elseif(EXISTS "$ENV{HOME}/JUCE/CMakeLists.txt")
     set(JUCE_DIR_SELECTED "$ENV{HOME}/JUCE")
+elseif(EXISTS "$ENV{HOME}/.local/git/juce/CMakeLists.txt")
+    set(JUCE_DIR_SELECTED "$ENV{HOME}/.local/git/juce")
+elseif(EXISTS "$ENV{HOME}/.local/git/JUCE/CMakeLists.txt")
+    set(JUCE_DIR_SELECTED "$ENV{HOME}/.local/git/JUCE")
 elseif(EXISTS "${CMAKE_SOURCE_DIR}/third_party/JUCE/CMakeLists.txt")
     set(JUCE_DIR_SELECTED "${CMAKE_SOURCE_DIR}/third_party/JUCE")
 else()

Makefile

@@ -4,6 +4,8 @@
 BUILD_DIR      ?= build
 LOCAL_JUCE     ?= third_party/JUCE
 HOME_JUCE      := $(HOME)/JUCE
+XDG_JUCE_LOWER := $(HOME)/.local/git/juce
+XDG_JUCE_UPPER := $(HOME)/.local/git/JUCE
 CMAKE          ?= cmake
 CONFIG         ?= Release
 JUCE_REPO      ?= https://github.com/juce-framework/JUCE.git
@@ -14,10 +16,15 @@ CODESIGN_ID    ?=
 VST3_DIR       := $(HOME)/Library/Audio/Plug-Ins/VST3/Terion.vst3
 AU_DIR         := $(HOME)/Library/Audio/Plug-Ins/Components/Terion.component
 
-# Prefer ~/JUCE if present, otherwise use the vendored copy in the repo.
+# Prefer a local JUCE checkout (~/JUCE, then ~/.local/git/{juce,JUCE}) if
+# present, otherwise use the vendored copy in the repo.
 ifeq ($(strip $(JUCE_DIR)),)
   ifneq ($(wildcard $(HOME_JUCE)/CMakeLists.txt),)
     JUCE_DIR := $(HOME_JUCE)
+  else ifneq ($(wildcard $(XDG_JUCE_LOWER)/CMakeLists.txt),)
+    JUCE_DIR := $(XDG_JUCE_LOWER)
+  else ifneq ($(wildcard $(XDG_JUCE_UPPER)/CMakeLists.txt),)
+    JUCE_DIR := $(XDG_JUCE_UPPER)
   else
     JUCE_DIR := $(LOCAL_JUCE)
   endif
@@ -28,7 +35,8 @@ endif
 all: configure
 	$(CMAKE) --build $(BUILD_DIR) --config $(CONFIG) -j$(JOBS)
 
-# Ensure a JUCE source tree is available: use ~/JUCE, else clone into third_party/.
+# Ensure a JUCE source tree is available: use a local checkout
+# (~/JUCE or ~/.local/git/{juce,JUCE}), else clone into third_party/.
 juce:
 	@if [ ! -f "$(JUCE_DIR)/CMakeLists.txt" ]; then \
 		if [ ! -d "$(dir $(JUCE_DIR))" ]; then mkdir -p "$(dir $(JUCE_DIR))"; fi; \
@@ -94,7 +102,7 @@ deepclean: clean
 help:
 	@echo "Targets:"
 	@echo "  all            configure + build"
-	@echo "  juce           clone JUCE into third_party/JUCE if missing (else use ~/JUCE)"
+	@echo "  juce           clone JUCE into third_party/JUCE if missing (else use ~/JUCE or ~/.local/git/{juce,JUCE})"
 	@echo "  configure      run CMake configure against $(BUILD_DIR)"
 	@echo "  build          compile the configured tree"
 	@echo "  sign           codesign both installed plugin bundles (ad-hoc by default)"

Source/PluginEditor.cpp

@@ -11,7 +11,6 @@ TerionProcessorEditor::TerionProcessorEditor(TerionProcessor& p)
 {
     setSize(kBaseWidth, kBaseHeight);
     setResizable(true, true);
-    setResizeLimits(kBaseWidth, kBaseHeight, 1200, 1200);
 
     addAndMakeVisible(scope);
 
@@ -47,6 +46,14 @@ TerionProcessorEditor::TerionProcessorEditor(TerionProcessor& p)
     freezeAttachment = std::make_unique<juce::AudioProcessorValueTreeState::ButtonAttachment>(
         processorRef.apvts, "freeze", freezeButton);
 
+    // Mono button
+    addAndMakeVisible(monoButton);
+    monoButton.setButtonText("MONO");
+    monoButton.setColour(juce::ToggleButton::textColourId, juce::Colour(0xff888899));
+    monoButton.setColour(juce::ToggleButton::tickColourId, juce::Colour(0xff7ecfcf));
+    monoAttachment = std::make_unique<juce::AudioProcessorValueTreeState::ButtonAttachment>(
+        processorRef.apvts, "mono", monoButton);
+
     // Scale dropdown
     addAndMakeVisible(scaleBox);
     scaleBox.addItem("100%", 1);
@@ -58,6 +65,10 @@ TerionProcessorEditor::TerionProcessorEditor(TerionProcessor& p)
     scaleBox.onChange = [this] { scaleChanged(); };
     scaleChanged();
 
+    // After any scale change, recompute the resize limits.
+    const int maxDim = static_cast<int>(kBaseWidth * kMaxScale);
+    setResizeLimits(kBaseWidth, kBaseHeight, maxDim, maxDim);
+
     // Knob labels (separate from knobs to ensure correct z-order)
     auto setupLabel = [this](juce::Label& label, const juce::String& text)
     {
@@ -89,7 +100,8 @@ void TerionProcessorEditor::scaleChanged()
         default: currentScale = 1.25f; break;
     }
 
-    setTransform(juce::AffineTransform::scale(currentScale));
+    const int maxDim = static_cast<int>(kBaseWidth * kMaxScale);
+    setResizeLimits(kBaseWidth, kBaseHeight, maxDim, maxDim);
     setSize(static_cast<int>(kBaseWidth * currentScale),
             static_cast<int>(kBaseHeight * currentScale));
 }
@@ -98,49 +110,62 @@ void TerionProcessorEditor::paint(juce::Graphics& g)
 {
     g.fillAll(juce::Colour(0xff0a0a0f));
 
+    const float s = currentScale;
+    const int footerH = static_cast<int>(kFooterHeight * s);
+
     // Footer
     auto bounds = getLocalBounds();
-    auto footer = bounds.removeFromBottom(kFooterHeight);
+    auto footer = bounds.removeFromBottom(footerH);
 
     g.setColour(juce::Colour(0xff15151e));
     g.fillRect(footer);
 
     g.setColour(juce::Colour(0xff555566));
-    g.setFont(9.0f);
+    g.setFont(juce::Font(juce::FontOptions(9.0f * s)));
 
     juce::String footerText = "Terion  "
         + juce::String(TERION_GIT_HASH)
         + "  |  " + juce::String(TERION_BUILD_TIME)
         + "  |  " + juce::String(TERION_GIT_LOCAL_COMMITS) + " local";
 
-    g.drawFittedText(footerText, footer.reduced(10, 0),
+    g.drawFittedText(footerText, footer.reduced(static_cast<int>(10.0f * s), 0),
                      juce::Justification::centredLeft, 1);
 }
 
 void TerionProcessorEditor::resized()
 {
-    auto bounds = getLocalBounds();
+    const float s = currentScale;
-    auto footer = bounds.removeFromBottom(kFooterHeight);
+    const int footerH = static_cast<int>(kFooterHeight * s);
+    const int knobs = static_cast<int>(kKnobSize * s);
+    const int margin = static_cast<int>(kKnobMargin * s);
+    const int scaleW = static_cast<int>(76.0f * s);
+    const int monoW = static_cast<int>(72.0f * s);
 
-    // Footer: scale dropdown on the right
+    auto bounds = getLocalBounds();
-    scaleBox.setBounds(footer.getWidth() - 60, 1, 56, kFooterHeight - 2);
+    auto footer = bounds.removeFromBottom(footerH);
+
+    // Footer: scale dropdown + mono toggle on the right
+    scaleBox.setBounds(footer.getWidth() - scaleW, 1, scaleW, footerH - 2);
+    monoButton.setBounds(footer.getWidth() - scaleW - monoW, 1, monoW, footerH - 2);
 
     // Scope fills the remaining area
     scope.setBounds(bounds);
 
     // Controls layout: top-right corner, horizontal row
-    const int startX = bounds.getWidth() - (4 * (kKnobSize + kKnobMargin) + kKnobSize + kKnobMargin);
+    const int startX = bounds.getWidth() - (4 * (knobs + margin) + knobs + margin);
-    const int startY = 10;
+    const int startY = static_cast<int>(10.0f * s);
 
-    fadeKnob.setBounds(startX, startY, kKnobSize, kKnobSize);
+    fadeKnob.setBounds(startX, startY, knobs, knobs);
-    sensitivityKnob.setBounds(startX + (kKnobSize + kKnobMargin), startY, kKnobSize, kKnobSize);
+    sensitivityKnob.setBounds(startX + (knobs + margin), startY, knobs, knobs);
-    dotSizeKnob.setBounds(startX + 2 * (kKnobSize + kKnobMargin), startY, kKnobSize, kKnobSize);
+    dotSizeKnob.setBounds(startX + 2 * (knobs + margin), startY, knobs, knobs);
-    smoothingKnob.setBounds(startX + 3 * (kKnobSize + kKnobMargin), startY, kKnobSize, kKnobSize);
+    smoothingKnob.setBounds(startX + 3 * (knobs + margin), startY, knobs, knobs);
-    freezeButton.setBounds(startX + 4 * (kKnobSize + kKnobMargin), startY + 10, kKnobSize, kKnobSize - 20);
+    freezeButton.setBounds(startX + 4 * (knobs + margin), startY + static_cast<int>(10.0f * s),
+                           knobs, knobs - static_cast<int>(20.0f * s));
 
-    const int labelY = startY + kKnobSize - 6;
+    const int labelY = startY + knobs - static_cast<int>(6.0f * s);
-    fadeLabel.setBounds(fadeKnob.getX(), labelY, kKnobSize, 12);
+    const int labelH = static_cast<int>(12.0f * s);
-    sensitivityLabel.setBounds(sensitivityKnob.getX(), labelY, kKnobSize, 12);
+    fadeLabel.setBounds(fadeKnob.getX(), labelY, knobs, labelH);
-    dotSizeLabel.setBounds(dotSizeKnob.getX(), labelY, kKnobSize, 12);
+    sensitivityLabel.setBounds(sensitivityKnob.getX(), labelY, knobs, labelH);
-    smoothingLabel.setBounds(smoothingKnob.getX(), labelY, kKnobSize, 12);
+    dotSizeLabel.setBounds(dotSizeKnob.getX(), labelY, knobs, labelH);
+    smoothingLabel.setBounds(smoothingKnob.getX(), labelY, knobs, labelH);
 }

Source/PluginEditor.h

@@ -24,6 +24,7 @@ private:
     ArcKnob dotSizeKnob;
     ArcKnob smoothingKnob;
     juce::ToggleButton freezeButton;
+    juce::ToggleButton monoButton;
     juce::ComboBox scaleBox;
     juce::Label fadeLabel, sensitivityLabel, dotSizeLabel, smoothingLabel;
 
@@ -32,6 +33,7 @@ private:
     std::unique_ptr<juce::AudioProcessorValueTreeState::SliderAttachment> dotSizeAttachment;
     std::unique_ptr<juce::AudioProcessorValueTreeState::SliderAttachment> smoothingAttachment;
     std::unique_ptr<juce::AudioProcessorValueTreeState::ButtonAttachment> freezeAttachment;
+    std::unique_ptr<juce::AudioProcessorValueTreeState::ButtonAttachment> monoAttachment;
 
     float currentScale = 1.0f;
     static constexpr int kBaseWidth = 420;
@@ -39,6 +41,7 @@ private:
     static constexpr int kFooterHeight = 28;
     static constexpr int kKnobSize = 54;
     static constexpr int kKnobMargin = 6;
+    static constexpr float kMaxScale = 3.0f;
 
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(TerionProcessorEditor)
 };

Source/PluginProcessor.cpp

@@ -29,6 +29,10 @@ TerionProcessor::TerionProcessor()
           std::make_unique<juce::AudioParameterBool>(
               juce::ParameterID{"freeze", 5},
               "Freeze",
+              false),
+          std::make_unique<juce::AudioParameterBool>(
+              juce::ParameterID{"mono", 6},
+              "Mono",
               false)
       })
 {
@@ -46,8 +50,10 @@ void TerionProcessor::processBlock(juce::AudioBuffer<float>& buffer, juce::MidiB
     juce::ScopedNoDenormals noDenormals;
 
     const int numSamples = buffer.getNumSamples();
-    const float* left = buffer.getReadPointer(0);
+    float* leftOut = buffer.getWritePointer(0);
-    const float* right = buffer.getNumChannels() > 1 ? buffer.getReadPointer(1) : left;
+    float* rightOut = buffer.getNumChannels() > 1 ? buffer.getWritePointer(1) : leftOut;
+    const float* left = leftOut;
+    const float* right = rightOut;
 
     const float fadeTime = apvts.getRawParameterValue("fadeTime")->load();
     const float agePerSample = 1.0f / (fadeTime * static_cast<float>(getSampleRate()));
@@ -55,6 +61,18 @@ void TerionProcessor::processBlock(juce::AudioBuffer<float>& buffer, juce::MidiB
     const float sensGain = juce::Decibels::decibelsToGain(apvts.getRawParameterValue("sensitivity")->load());
     const float smoothCoef = apvts.getRawParameterValue("smoothing")->load();
     const float frozen = apvts.getRawParameterValue("freeze")->load();
+    const float mono = apvts.getRawParameterValue("mono")->load();
+
+    // Collapse to mono: sum L/R and duplicate into both channels
+    if (mono > 0.5f && buffer.getNumChannels() > 1)
+    {
+        for (int i = 0; i < numSamples; ++i)
+        {
+            float m = (left[i] + right[i]) * 0.5f;
+            leftOut[i] = m;
+            rightOut[i] = m;
+        }
+    }
 
     // Reset metrics for this block
     sumMid = 0.0f;

Source/PluginProcessor.h

@@ -67,7 +67,8 @@ public:
         sensitivity = 2,
         dotSize = 3,
         smoothing = 4,
-        freeze = 5
+        freeze = 5,
+        mono = 6
     };
 
 private: