--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DPF-Prymula-audioplugins/dpf/dgl/EventHandlers.hpp	Mon Oct 16 21:53:34 2023 +0200
@@ -0,0 +1,197 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2022 Filipe Coelho <falktx@falktx.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any purpose with
+ * or without fee is hereby granted, provided that the above copyright notice and this
+ * permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
+ * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef DGL_EVENT_HANDLERS_HPP_INCLUDED
+#define DGL_EVENT_HANDLERS_HPP_INCLUDED
+
+#include "Widget.hpp"
+
+START_NAMESPACE_DGL
+
+/* NOTE none of these classes get assigned to a widget automatically
+   Manual plugging into Widget events is needed, like so:
+
+    ```
+    bool onMouse(const MouseEvent& ev) override
+    {
+        return ButtonEventHandler::mouseEvent(ev);
+    }
+    ```
+*/
+
+// --------------------------------------------------------------------------------------------------------------------
+
+class ButtonEventHandler
+{
+public:
+    enum State {
+        kButtonStateDefault = 0x0,
+        kButtonStateHover = 0x1,
+        kButtonStateActive = 0x2,
+        kButtonStateActiveHover = kButtonStateActive|kButtonStateHover
+    };
+
+    class Callback
+    {
+    public:
+        virtual ~Callback() {}
+        virtual void buttonClicked(SubWidget* widget, int button) = 0;
+    };
+
+    explicit ButtonEventHandler(SubWidget* self);
+    virtual ~ButtonEventHandler();
+
+    bool isActive() noexcept;
+    void setActive(bool active, bool sendCallback) noexcept;
+
+    bool isChecked() const noexcept;
+    void setChecked(bool checked, bool sendCallback) noexcept;
+
+    bool isCheckable() const noexcept;
+    void setCheckable(bool checkable) noexcept;
+
+    Point<double> getLastClickPosition() const noexcept;
+    Point<double> getLastMotionPosition() const noexcept;
+
+    void setCallback(Callback* callback) noexcept;
+
+    bool mouseEvent(const Widget::MouseEvent& ev);
+    bool motionEvent(const Widget::MotionEvent& ev);
+
+protected:
+    State getState() const noexcept;
+    void clearState() noexcept;
+
+    virtual void stateChanged(State state, State oldState);
+
+    void setInternalCallback(Callback* callback) noexcept;
+    void triggerUserCallback(SubWidget* widget, int button);
+
+private:
+    struct PrivateData;
+    PrivateData* const pData;
+
+    DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(ButtonEventHandler)
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
+class KnobEventHandler
+{
+public:
+    enum Orientation {
+        Horizontal,
+        Vertical,
+        Both
+    };
+
+    // NOTE hover not implemented yet
+    enum State {
+        kKnobStateDefault = 0x0,
+        kKnobStateHover = 0x1,
+        kKnobStateDragging = 0x2,
+        kKnobStateDraggingHover = kKnobStateDragging|kKnobStateHover
+    };
+
+    class Callback
+    {
+    public:
+        virtual ~Callback() {}
+        virtual void knobDragStarted(SubWidget* widget) = 0;
+        virtual void knobDragFinished(SubWidget* widget) = 0;
+        virtual void knobValueChanged(SubWidget* widget, float value) = 0;
+        virtual void knobDoubleClicked(SubWidget*) {};
+    };
+
+    explicit KnobEventHandler(SubWidget* self);
+    explicit KnobEventHandler(SubWidget* self, const KnobEventHandler& other);
+    KnobEventHandler& operator=(const KnobEventHandler& other);
+    virtual ~KnobEventHandler();
+
+    // if setStep(1) has been called before, this returns true
+    bool isInteger() const noexcept;
+
+    // returns raw value, is assumed to be scaled if using log
+    float getValue() const noexcept;
+
+    // NOTE: value is assumed to be scaled if using log
+    virtual bool setValue(float value, bool sendCallback = false) noexcept;
+
+    // returns 0-1 ranged value, already with log scale as needed
+    float getNormalizedValue() const noexcept;
+
+    // NOTE: value is assumed to be scaled if using log
+    void setDefault(float def) noexcept;
+
+    // NOTE: value is assumed to be scaled if using log
+    void setRange(float min, float max) noexcept;
+
+    void setStep(float step) noexcept;
+
+    void setUsingLogScale(bool yesNo) noexcept;
+
+    Orientation getOrientation() const noexcept;
+    void setOrientation(Orientation orientation) noexcept;
+
+    void setCallback(Callback* callback) noexcept;
+
+    // default 200, higher means slower
+    void setMouseDeceleration(float accel) noexcept;
+
+    bool mouseEvent(const Widget::MouseEvent& ev, double scaleFactor = 1.0);
+    bool motionEvent(const Widget::MotionEvent& ev, double scaleFactor = 1.0);
+    bool scrollEvent(const Widget::ScrollEvent& ev);
+
+protected:
+    State getState() const noexcept;
+
+private:
+    struct PrivateData;
+    PrivateData* const pData;
+
+    /* not for use */
+#ifdef DISTRHO_PROPER_CPP11_SUPPORT
+    KnobEventHandler(KnobEventHandler& other) = delete;
+    KnobEventHandler(const KnobEventHandler& other) = delete;
+#else
+    KnobEventHandler(KnobEventHandler& other);
+    KnobEventHandler(const KnobEventHandler& other);
+#endif
+
+    DISTRHO_LEAK_DETECTOR(KnobEventHandler)
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
+class SliderEventHandler
+{
+public:
+    explicit SliderEventHandler(SubWidget* self);
+    virtual ~SliderEventHandler();
+
+private:
+    struct PrivateData;
+    PrivateData* const pData;
+
+    DISTRHO_LEAK_DETECTOR(SliderEventHandler)
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
+END_NAMESPACE_DGL
+
+#endif // DGL_EVENT_HANDLERS_HPP_INCLUDED
+