Scrollwheel 607 - Add scrollwheel support to various controls (surge-…

…synthesizer#650)

Scrollwheel support for most of the UI elements, but most importantly, for sliders when moused over allows quick editing with scroll gestures. 

Closes surge-synthesizer#605 flashing popups
Closes surge-synthesizer#607 scroll wheel support

src/common/gui/CHSwitch2.cpp

@@ -107,3 +107,26 @@ CMouseEventResult CHSwitch2::onMouseMoved(CPoint& where, const CButtonState& but
    }
    return kMouseEventNotHandled;
 }
+bool CHSwitch2::onWheel(const CPoint& where, const float& distance, const CButtonState& buttons)
+{
+   float newVal=value;
+   float rate = 1.0f;
+   float range = getRange();
+   if (columns >1)
+   {
+      rate = range / (float)columns;
+      newVal += rate * distance;
+   }
+   else
+   {
+      rate = range / (float)rows;
+      newVal += rate * -distance; // flip distance (==direction) because it makes more sense when wheeling
+   }
+   beginEdit();
+   value = newVal;
+   bounceValue();
+   if (listener)
+      listener->valueChanged(this);
+   setValue(value);
+   return true;
+}

src/common/gui/CHSwitch2.h

@@ -39,5 +39,7 @@ class CHSwitch2 : public VSTGUI::CHorizontalSwitch
    virtual VSTGUI::CMouseEventResult
    onMouseMoved(VSTGUI::CPoint& where,
                 const VSTGUI::CButtonState& buttons); ///< called when a mouse move event occurs
+   virtual bool
+   onWheel (const VSTGUI::CPoint& where, const float& distance, const VSTGUI::CButtonState& buttons); ///< called when scrollwheel events occurs    
    CLASS_METHODS(CHSwitch2, VSTGUI::CControl)
 };

src/common/gui/CNumberField.cpp

@@ -657,7 +657,21 @@ CMouseEventResult CNumberField::onMouseMoved(CPoint& where, const CButtonState&
    }
    return kMouseEventHandled;
 }
-
+bool CNumberField::onWheel(const CPoint& where, const float& distance, const CButtonState& buttons)
+{
+   beginEdit();
+   i_value += int(distance);
+   int steps = i_max - i_min;
+   int offset = i_value - i_min;
+   float multiplier = 1.0f / (float) steps;
+   value = (float) offset * multiplier;
+   setIntValue(i_value); // also does bounceValue for i_value and value ..and setDirty
+   setValue(value);
+   if (isDirty() && listener)
+         listener->valueChanged(this);
+   endEdit();
+   return true;
+}
 //------------------------------------------------------------------------
 /*void CParamEdit::mouse (CDrawContext *pContext, CPoint &where, long buttons)
 {

src/common/gui/CNumberField.h

@@ -223,7 +223,7 @@ class CNumberField : public VSTGUI::CControl
    virtual VSTGUI::CMouseEventResult onMouseDown(VSTGUI::CPoint& where, const VSTGUI::CButtonState& buttons);
    virtual VSTGUI::CMouseEventResult onMouseUp(VSTGUI::CPoint& where, const VSTGUI::CButtonState& buttons);
    virtual VSTGUI::CMouseEventResult onMouseMoved(VSTGUI::CPoint& where, const VSTGUI::CButtonState& buttons);
-   // virtual bool onWheel (VSTGUI::CDrawContext *pContext, const VSTGUI::CPoint &where, float distance);
+   virtual bool onWheel(const VSTGUI::CPoint& where, const float& distance, const VSTGUI::CButtonState& buttons);
    bool altlook;
 
 private:

src/common/gui/CSurgeSlider.cpp

@@ -435,3 +435,36 @@ void CSurgeSlider::setBipolar(bool b)
 
    setDirty();
 }
+bool CSurgeSlider::onWheel(const VSTGUI::CPoint& where, const float &distance, const VSTGUI::CButtonState& buttons)
+{
+   // shift + scrollwheel for fine control
+   double rate = 0.1 * moverate;
+   if (buttons & kShift)
+      rate *= 0.05;
+
+   edit_value = modmode ? &modval : &value;
+   oldVal = *edit_value;
+
+   beginEdit();
+   *edit_value += rate * distance;
+   bounceValue();
+   if (modmode)
+   {
+      setModValue(*edit_value);
+   }
+   else
+   {
+      setValue(value);
+   }
+   setDirty();
+   if (isDirty() && listener)
+      listener->valueChanged(this);
+   //endEdit();
+   /*
+   ** No need to call endEdit since the timer in SurgeGUIEditor will close the
+   ** info window, and  SurgeGUIEditor will make sure a window
+   ** doesn't appear twice
+   */
+   edit_value = nullptr;
+   return true;   
+}

src/common/gui/CSurgeSlider.h

@@ -28,6 +28,8 @@ class CSurgeSlider : public CCursorHidingControl
    virtual void draw(VSTGUI::CDrawContext*);
    // virtual void mouse (VSTGUI::CDrawContext *pContext, VSTGUI::CPoint &where, long buttons = -1);
    // virtual bool onWheel (VSTGUI::CDrawContext *pContext, const VSTGUI::CPoint &where, float distance);
+   virtual bool 
+   onWheel(const VSTGUI::CPoint& where, const float &distane, const VSTGUI::CButtonState& buttons);
 
    virtual VSTGUI::CMouseEventResult
    onMouseDown(VSTGUI::CPoint& where,

src/common/gui/SurgeGUIEditor.cpp

@@ -2426,10 +2426,22 @@ void SurgeGUIEditor::draw_infowindow(int ptag, CControl* control, bool modulate,
 
    if (buttons || forceMB)
    {
+      // make sure an infowindow doesn't appear twice
+      if (((CParameterTooltip*)infowindow)->isVisible())
+      {
+         ((CParameterTooltip*)infowindow)->Hide();
+         ((CParameterTooltip*)infowindow)->invalid();
+      }
+
       ((CParameterTooltip*)infowindow)->setViewSize(r);
       ((CParameterTooltip*)infowindow)->Show();
       infowindow->invalid();
+      // on Linux the infoview closes too soon
+      #if LINUX
+      clear_infoview_countdown = 100;
+      #else
       clear_infoview_countdown = 40;
+      #endif
    }
    else
    {