diff --git a/rtgui/adjuster.cc b/rtgui/adjuster.cc
index 142374213..6f8c0e83a 100644
--- a/rtgui/adjuster.cc
+++ b/rtgui/adjuster.cc
@@ -36,7 +36,7 @@ double one2one(double val)
 }
 }
 
-Adjuster::Adjuster (
+Adjuster::Adjuster(
     Glib::ustring vlabel,
     double vmin,
     double vmax,
@@ -45,21 +45,20 @@ Adjuster::Adjuster (
     Gtk::Image *imgIcon1,
     Gtk::Image *imgIcon2,
     double2double_fun slider2value,
-    double2double_fun value2slider)
-
-    :
-
+    double2double_fun value2slider
+) :
     adjustmentName(std::move(vlabel)),
     grid(nullptr),
     label(nullptr),
     imageIcon1(imgIcon1),
     automatic(nullptr),
     adjusterListener(nullptr),
+    spinChange(options.adjusterMinDelay, options.adjusterMaxDelay),
+    sliderChange(options.adjusterMinDelay, options.adjusterMaxDelay),
     editedCheckBox(nullptr),
     afterReset(false),
     blocked(false),
     addMode(false),
-    eventPending(false),
     vMin(vmin),
     vMax(vmax),
     vStep(vstep),
@@ -67,8 +66,7 @@ Adjuster::Adjuster (
     logPivot(0),
     logAnchorMiddle(false),
     value2slider(value2slider ? value2slider : &one2one),
-    slider2value(slider2value ? slider2value : &one2one),
-    delay(options.adjusterMinDelay)
+    slider2value(slider2value ? slider2value : &one2one)
 
 {
     set_hexpand(true);
@@ -155,8 +153,27 @@ Adjuster::Adjuster (
     defaultVal = ctorDefaultVal = shapeValue(vdefault);
     editedState = defEditedState = Irrelevant;
 
-    sliderChange = slider->signal_value_changed().connect( sigc::mem_fun(*this, &Adjuster::sliderChanged) );
-    spinChange = spin->signal_value_changed().connect( sigc::mem_fun(*this, &Adjuster::spinChanged), true);
+    spinChange.connect(
+        spin->signal_value_changed(),
+        sigc::mem_fun(*this, &Adjuster::spinChanged),
+        [this]()
+        {
+            sliderChange.block(true);
+            setSliderValue(addMode ? spin->get_value() : this->value2slider(spin->get_value()));
+            sliderChange.block(false);
+        }
+    );
+    sliderChange.connect(
+        slider->signal_value_changed(),
+        sigc::mem_fun(*this, &Adjuster::sliderChanged),
+        [this]()
+        {
+            spinChange.block();
+            const double v = shapeValue(getSliderValue());
+            spin->set_value(addMode ? v : this->slider2value(v));
+            spinChange.unblock();
+        }
+    );
     reset->signal_button_release_event().connect_notify( sigc::mem_fun(*this, &Adjuster::resetPressed) );
 
     show_all();
@@ -165,9 +182,8 @@ Adjuster::Adjuster (
 Adjuster::~Adjuster ()
 {
 
-    sliderChange.block(true);
-    spinChange.block(true);
-    delayConnection.block(true);
+    sliderChange.block();
+    spinChange.block();
     adjusterListener = nullptr;
 
 }
@@ -211,8 +227,6 @@ void Adjuster::throwOnButtonRelease(bool throwOnBRelease)
             buttonReleaseSpin.disconnect();
         }
     }
-
-    eventPending = false;
 }
 
 void Adjuster::setDefault (double def)
@@ -239,9 +253,7 @@ void Adjuster::sliderReleased (GdkEventButton* event)
 {
 
     if ((event != nullptr) && (event->button == 1)) {
-        if (delayConnection.connected()) {
-            delayConnection.disconnect();
-        }
+        sliderChange.cancel();
 
         notifyListener();
     }
@@ -250,10 +262,8 @@ void Adjuster::sliderReleased (GdkEventButton* event)
 void Adjuster::spinReleased (GdkEventButton* event)
 {
 
-    if ((event != nullptr) && delay == 0) {
-        if (delayConnection.connected()) {
-            delayConnection.disconnect();
-        }
+    if (event) {
+        spinChange.cancel();
 
         notifyListener();
     }
@@ -351,31 +361,15 @@ void Adjuster::setAddMode(bool addM)
     }
 }
 
-void Adjuster::spinChanged ()
+void Adjuster::spinChanged()
 {
-    if (delayConnection.connected()) {
-        delayConnection.disconnect();
-    }
-
-    sliderChange.block(true);
-    setSliderValue(addMode ? spin->get_value() : value2slider(spin->get_value()));
-    sliderChange.block(false);
-
-    if (delay == 0) {
-        if (adjusterListener && !blocked) {
-            if (!buttonReleaseSlider.connected() || afterReset) {
-                eventPending = false;
-                if (automatic) {
-                    setAutoValue(false);
-                }
-                adjusterListener->adjusterChanged(this, spin->get_value());
-            } else {
-                eventPending = true;
+    if (adjusterListener && !blocked) {
+        if (!buttonReleaseSlider.connected() || afterReset) {
+            if (automatic) {
+                setAutoValue(false);
             }
+            adjusterListener->adjusterChanged(this, spin->get_value());
         }
-    } else {
-        eventPending = true;
-        delayConnection = Glib::signal_timeout().connect(sigc::mem_fun(*this, &Adjuster::notifyListener), delay);
     }
 
     if (editedState == UnEdited) {
@@ -393,31 +387,13 @@ void Adjuster::spinChanged ()
 
 void Adjuster::sliderChanged ()
 {
-
-    if (delayConnection.connected()) {
-        delayConnection.disconnect();
-    }
-
-    spinChange.block(true);
-    const double v = shapeValue(getSliderValue());
-    spin->set_value(addMode ? v : slider2value(v));
-    spinChange.block(false);
-
-    if (delay == 0 || afterReset) {
-        if (adjusterListener && !blocked) {
-            if (!buttonReleaseSlider.connected() || afterReset) {
-                eventPending = false;
-                if (automatic) {
-                    setAutoValue(false);
-                }
-                adjusterListener->adjusterChanged(this, spin->get_value());
-            } else {
-                eventPending = true;
+    if (adjusterListener && !blocked) {
+        if (!buttonReleaseSlider.connected() || afterReset) {
+            if (automatic) {
+                setAutoValue(false);
             }
+            adjusterListener->adjusterChanged(this, spin->get_value());
         }
-    } else {
-        eventPending = true;
-        delayConnection = Glib::signal_timeout().connect(sigc::mem_fun(*this, &Adjuster::notifyListener), delay);
     }
 
     if (!afterReset && editedState == UnEdited) {
@@ -435,12 +411,12 @@ void Adjuster::sliderChanged ()
 
 void Adjuster::setValue (double a)
 {
-    spinChange.block(true);
+    spinChange.block();
     sliderChange.block(true);
     spin->set_value(shapeValue(a));
     setSliderValue(addMode ? shapeValue(a) : value2slider(shapeValue(a)));
     sliderChange.block(false);
-    spinChange.block(false);
+    spinChange.unblock();
     afterReset = false;
 }
 
@@ -455,16 +431,13 @@ void Adjuster::setAutoValue (bool a)
 
 bool Adjuster::notifyListener ()
 {
-
-    if (eventPending && adjusterListener != nullptr && !blocked) {
+    if (adjusterListener != nullptr && !blocked) {
         if (automatic) {
             setAutoValue(false);
         }
         adjusterListener->adjusterChanged(this, spin->get_value());
     }
 
-    eventPending = false;
-
     return false;
 }
 
@@ -555,8 +528,6 @@ void Adjuster::editedToggled ()
         }
         adjusterListener->adjusterChanged(this, spin->get_value());
     }
-
-    eventPending = false;
 }
 
 void Adjuster::trimValue (double &val) const
@@ -706,3 +677,9 @@ bool Adjuster::getAddMode() const
 {
     return addMode;
 }
+
+void Adjuster::setDelay(unsigned int min_delay_ms, unsigned int max_delay_ms)
+{
+    spinChange.setDelay(min_delay_ms, max_delay_ms);
+    sliderChange.setDelay(min_delay_ms, max_delay_ms);
+}
diff --git a/rtgui/adjuster.h b/rtgui/adjuster.h
index 143268786..abafbd730 100644
--- a/rtgui/adjuster.h
+++ b/rtgui/adjuster.h
@@ -19,6 +19,7 @@
 #pragma once
 
 #include "editedstate.h"
+#include "delayed.h"
 #include "guiutils.h"
 
 class Adjuster;
@@ -35,7 +36,6 @@ typedef double(*double2double_fun)(double val);
 
 class Adjuster final : public Gtk::Grid
 {
-
 protected:
     Glib::ustring adjustmentName;
     Gtk::Grid* grid;
@@ -46,9 +46,8 @@ protected:
     Gtk::Button* reset;
     Gtk::CheckButton* automatic;
     AdjusterListener* adjusterListener;
-    sigc::connection delayConnection;
-    sigc::connection spinChange;
-    sigc::connection sliderChange;
+    DelayedConnection<> spinChange;
+    DelayedConnection<> sliderChange;
     sigc::connection editedChange;
     sigc::connection autoChange;
     sigc::connection buttonReleaseSlider;
@@ -62,7 +61,6 @@ protected:
     bool afterReset;
     bool blocked;
     bool addMode;
-    bool eventPending;
     double vMin;
     double vMax;
     double vStep;
@@ -78,11 +76,18 @@ protected:
     void setSliderValue(double val);
 
 public:
-
-    int delay;
-
-    Adjuster (Glib::ustring vlabel, double vmin, double vmax, double vstep, double vdefault, Gtk::Image *imgIcon1 = nullptr, Gtk::Image *imgIcon2 = nullptr, double2double_fun slider2value = nullptr, double2double_fun value2slider = nullptr);
-    ~Adjuster () override;
+    Adjuster(
+        Glib::ustring vlabel,
+        double vmin,
+        double vmax,
+        double vstep,
+        double vdefault,
+        Gtk::Image *imgIcon1 = nullptr,
+        Gtk::Image *imgIcon2 = nullptr,
+        double2double_fun slider2value = nullptr,
+        double2double_fun value2slider = nullptr
+    );
+    ~Adjuster() override;
 
     // Add an "Automatic" checkbox next to the reset button.
     void addAutoButton(const Glib::ustring &tooltip = "");
@@ -127,4 +132,5 @@ public:
     void trimValue (float &val) const;
     void trimValue (int &val) const;
     void setLogScale(double base, double pivot, bool anchorMiddle = false);
+    void setDelay(unsigned int min_delay_ms, unsigned int max_delay_ms = 0);
 };
diff --git a/rtgui/bayerpreprocess.cc b/rtgui/bayerpreprocess.cc
index 0c01213e7..2a1896d80 100644
--- a/rtgui/bayerpreprocess.cc
+++ b/rtgui/bayerpreprocess.cc
@@ -37,18 +37,14 @@ BayerPreProcess::BayerPreProcess() : FoldableToolPanel(this, "bayerpreprocess",
     lineDenoise = Gtk::manage(new Adjuster(M("TP_PREPROCESS_LINEDENOISE"), 0, 1000, 1, 0));
     lineDenoise->setAdjusterListener(this);
 
-    if (lineDenoise->delay < options.adjusterMaxDelay) {
-        lineDenoise->delay = options.adjusterMaxDelay;
-    }
+    lineDenoise->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     lineDenoise->show();
 
     greenEqThreshold = Gtk::manage(new Adjuster(M("TP_PREPROCESS_GREENEQUIL"), 0, 100, 1, 0));
     greenEqThreshold->setAdjusterListener(this);
 
-    if (greenEqThreshold->delay < options.adjusterMaxDelay) {
-        greenEqThreshold->delay = options.adjusterMaxDelay;
-    }
+    greenEqThreshold->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     greenEqThreshold->show();
 
diff --git a/rtgui/bayerprocess.cc b/rtgui/bayerprocess.cc
index f678c858b..d219dbdd1 100644
--- a/rtgui/bayerprocess.cc
+++ b/rtgui/bayerprocess.cc
@@ -60,9 +60,7 @@ BayerProcess::BayerProcess () :
     dualDemosaicContrast->setAdjusterListener(this);
     dualDemosaicContrast->addAutoButton(M("TP_RAW_DUALDEMOSAICAUTOCONTRAST_TOOLTIP"));
     dualDemosaicContrast->setAutoValue(true);
-    if (dualDemosaicContrast->delay < options.adjusterMaxDelay) {
-        dualDemosaicContrast->delay = options.adjusterMaxDelay;
-    }
+    dualDemosaicContrast->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     dualDemosaicContrast->show();
     dualDemosaicOptions->pack_start(*dualDemosaicContrast);
@@ -72,9 +70,7 @@ BayerProcess::BayerProcess () :
     border = Gtk::manage(new Adjuster(M("TP_RAW_BORDER"), 0, 16, 1, 4));
     border->setAdjusterListener (this);
 
-    if (border->delay < options.adjusterMaxDelay) {
-        border->delay = options.adjusterMaxDelay;
-    }
+    border->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     border->show();
     borderbox->pack_start(*border);
@@ -96,22 +92,17 @@ BayerProcess::BayerProcess () :
     ccSteps = Gtk::manage (new Adjuster (M("TP_RAW_FALSECOLOR"), 0, 5, 1, 0 ));
     ccSteps->setAdjusterListener (this);
 
-    if (ccSteps->delay < options.adjusterMaxDelay) {
-        ccSteps->delay = options.adjusterMaxDelay;
-    }
+    ccSteps->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     ccSteps->show();
     pack_start( *ccSteps, Gtk::PACK_SHRINK, 4);
 
-
     dcbOptions = Gtk::manage (new Gtk::VBox ());
 
     dcbIterations = Gtk::manage (new Adjuster (M("TP_RAW_DCBITERATIONS"), 0, 5, 1, 2));
     dcbIterations->setAdjusterListener (this);
 
-    if (dcbIterations->delay < options.adjusterMaxDelay) {
-        dcbIterations->delay = options.adjusterMaxDelay;
-    }
+    dcbIterations->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     dcbIterations->show();
     dcbEnhance = Gtk::manage (new CheckBox(M("TP_RAW_DCBENHANCE"), multiImage));
@@ -126,9 +117,7 @@ BayerProcess::BayerProcess () :
     lmmseIterations->setAdjusterListener (this);
     lmmseIterations->set_tooltip_markup (M("TP_RAW_LMMSE_TOOLTIP"));
 
-    if (lmmseIterations->delay < options.adjusterMaxDelay) {
-        lmmseIterations->delay = options.adjusterMaxDelay;
-    }
+    lmmseIterations->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     lmmseIterations->show();
     lmmseOptions->pack_start(*lmmseIterations);
@@ -209,9 +198,7 @@ BayerProcess::BayerProcess () :
     pixelShiftSigma->set_tooltip_text (M("TP_RAW_PIXELSHIFTSIGMA_TOOLTIP"));
     pixelShiftSigma->setAdjusterListener (this);
 
-    if (pixelShiftSigma->delay < options.adjusterMaxDelay) {
-        pixelShiftSigma->delay = options.adjusterMaxDelay;
-    }
+    pixelShiftSigma->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     pixelShiftSigma->show();
     pixelShiftOptions->pack_start(*pixelShiftSigma);
@@ -221,9 +208,7 @@ BayerProcess::BayerProcess () :
     pixelShiftSmooth->set_tooltip_text (M("TP_RAW_PIXELSHIFTSMOOTH_TOOLTIP"));
     pixelShiftSmooth->setAdjusterListener (this);
 
-    if (pixelShiftSmooth->delay < options.adjusterMaxDelay) {
-        pixelShiftSmooth->delay = options.adjusterMaxDelay;
-    }
+    pixelShiftSmooth->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     pixelShiftSmooth->show();
     pixelShiftOptions->pack_start(*pixelShiftSmooth);
@@ -232,9 +217,7 @@ BayerProcess::BayerProcess () :
     pixelShiftEperIso->set_tooltip_text(M("TP_RAW_PIXELSHIFTEPERISO_TOOLTIP"));
     pixelShiftEperIso->setAdjusterListener (this);
 
-    if (pixelShiftEperIso->delay < options.adjusterMaxDelay) {
-        pixelShiftEperIso->delay = options.adjusterMaxDelay;
-    }
+    pixelShiftEperIso->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     pixelShiftEperIso->show();
     pixelShiftOptions->pack_start(*pixelShiftEperIso);
diff --git a/rtgui/bayerrawexposure.cc b/rtgui/bayerrawexposure.cc
index 9d8f9fff8..bb3c3a48a 100644
--- a/rtgui/bayerrawexposure.cc
+++ b/rtgui/bayerrawexposure.cc
@@ -31,33 +31,25 @@ BayerRAWExposure::BayerRAWExposure () : FoldableToolPanel(this, "bayerrawexposur
     PexBlack1 = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_BLACK_1"), -2048, 2048, 1.0, 0)); //black level
     PexBlack1->setAdjusterListener (this);
 
-    if (PexBlack1->delay < options.adjusterMaxDelay) {
-        PexBlack1->delay = options.adjusterMaxDelay;
-    }
+    PexBlack1->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexBlack1->show();
     PexBlack2 = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_BLACK_2"), -2048, 2048, 1.0, 0)); //black level
     PexBlack2->setAdjusterListener (this);
 
-    if (PexBlack2->delay < options.adjusterMaxDelay) {
-        PexBlack2->delay = options.adjusterMaxDelay;
-    }
+    PexBlack2->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexBlack2->show();
     PexBlack3 = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_BLACK_3"), -2048, 2048, 1.0, 0)); //black level
     PexBlack3->setAdjusterListener (this);
 
-    if (PexBlack3->delay < options.adjusterMaxDelay) {
-        PexBlack3->delay = options.adjusterMaxDelay;
-    }
+    PexBlack3->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexBlack3->show();
     PexBlack0 = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_BLACK_0"), -2048, 2048, 1.0, 0)); //black level
     PexBlack0->setAdjusterListener (this);
 
-    if (PexBlack0->delay < options.adjusterMaxDelay) {
-        PexBlack0->delay = options.adjusterMaxDelay;
-    }
+    PexBlack0->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexBlack0->show();
     PextwoGreen = Gtk::manage(new CheckBox(M("TP_RAWEXPOS_TWOGREEN"), multiImage));// two green
diff --git a/rtgui/colorappearance.cc b/rtgui/colorappearance.cc
index bdbe3de3a..934f922ae 100644
--- a/rtgui/colorappearance.cc
+++ b/rtgui/colorappearance.cc
@@ -244,9 +244,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     degree  = Gtk::manage (new Adjuster (M ("TP_COLORAPP_CIECAT_DEGREE"),    0.,  100.,  1.,   90.));
 
-    if (degree->delay < options.adjusterMaxDelay) {
-        degree->delay = options.adjusterMaxDelay;
-    }
+    degree->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     degree->throwOnButtonRelease();
     degree->addAutoButton (M ("TP_COLORAPP_CAT02ADAPTATION_TOOLTIP"));
@@ -325,9 +323,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 //   adapscen = Gtk::manage (new Adjuster (M ("TP_COLORAPP_ABSOLUTELUMINANCE"), 0.01, 16384., 0.001, 2000.)); // EV -7  ==> EV 17
     adapscen = Gtk::manage (new Adjuster (M ("TP_COLORAPP_ABSOLUTELUMINANCE"), MINLA0, MAXLA0, 0.01, 1997.4, NULL, NULL, &wbSlider2la, &wbla2Slider));
 
-    if (adapscen->delay < options.adjusterMaxDelay) {
-        adapscen->delay = options.adjusterMaxDelay;
-    }
+    adapscen->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     adapscen->throwOnButtonRelease();
     adapscen->addAutoButton();
@@ -335,9 +331,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     ybscen = Gtk::manage (new Adjuster (M ("TP_COLORAPP_MEANLUMINANCE"), 1, 90, 1, 18));
 
-    if (ybscen->delay < options.adjusterMaxDelay) {
-        ybscen->delay = options.adjusterMaxDelay;
-    }
+    ybscen->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     ybscen->throwOnButtonRelease();
     ybscen->addAutoButton();
@@ -386,9 +380,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     jlight = Gtk::manage (new Adjuster (M ("TP_COLORAPP_LIGHT"), -100.0, 100.0, 0.1, 0.));
 
-    if (jlight->delay < options.adjusterMaxDelay) {
-        jlight->delay = options.adjusterMaxDelay;
-    }
+    jlight->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     jlight->throwOnButtonRelease();
     jlight->set_tooltip_markup (M ("TP_COLORAPP_LIGHT_TOOLTIP"));
@@ -396,9 +388,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     qbright = Gtk::manage (new Adjuster (M ("TP_COLORAPP_BRIGHT"), -100.0, 100.0, 0.1, 0.));
 
-    if (qbright->delay < options.adjusterMaxDelay) {
-        qbright->delay = options.adjusterMaxDelay;
-    }
+    qbright->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     qbright->throwOnButtonRelease();
     qbright->set_tooltip_markup (M ("TP_COLORAPP_BRIGHT_TOOLTIP"));
@@ -406,9 +396,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     chroma = Gtk::manage (new Adjuster (M ("TP_COLORAPP_CHROMA"), -100.0, 100.0, 0.1, 0.));
 
-    if (chroma->delay < options.adjusterMaxDelay) {
-        chroma->delay = options.adjusterMaxDelay;
-    }
+    chroma->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     chroma->throwOnButtonRelease();
     chroma->set_tooltip_markup (M ("TP_COLORAPP_CHROMA_TOOLTIP"));
@@ -417,9 +405,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     schroma = Gtk::manage (new Adjuster (M ("TP_COLORAPP_CHROMA_S"), -100.0, 100.0, 0.1, 0.));
 
-    if (schroma->delay < options.adjusterMaxDelay) {
-        schroma->delay = options.adjusterMaxDelay;
-    }
+    schroma->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     schroma->throwOnButtonRelease();
     schroma->set_tooltip_markup (M ("TP_COLORAPP_CHROMA_S_TOOLTIP"));
@@ -427,9 +413,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     mchroma = Gtk::manage (new Adjuster (M ("TP_COLORAPP_CHROMA_M"), -100.0, 100.0, 0.1, 0.));
 
-    if (mchroma->delay < options.adjusterMaxDelay) {
-        mchroma->delay = options.adjusterMaxDelay;
-    }
+    mchroma->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     mchroma->throwOnButtonRelease();
     mchroma->set_tooltip_markup (M ("TP_COLORAPP_CHROMA_M_TOOLTIP"));
@@ -437,9 +421,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     rstprotection = Gtk::manage ( new Adjuster (M ("TP_COLORAPP_RSTPRO"), 0., 100., 0.1, 0.) );
 
-    if (rstprotection->delay < options.adjusterMaxDelay) {
-        rstprotection->delay = options.adjusterMaxDelay;
-    }
+    rstprotection->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     rstprotection->throwOnButtonRelease();
     rstprotection->set_tooltip_markup (M ("TP_COLORAPP_RSTPRO_TOOLTIP"));
@@ -447,9 +429,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     contrast = Gtk::manage (new Adjuster (M ("TP_COLORAPP_CONTRAST"), -100.0, 100.0, 0.1, 0.));
 
-    if (contrast->delay < options.adjusterMaxDelay) {
-        contrast->delay = options.adjusterMaxDelay;
-    }
+    contrast->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     contrast->throwOnButtonRelease();
     contrast->set_tooltip_markup (M ("TP_COLORAPP_CONTRAST_TOOLTIP"));
@@ -457,9 +437,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     qcontrast = Gtk::manage (new Adjuster (M ("TP_COLORAPP_CONTRAST_Q"), -100.0, 100.0, 0.1, 0.));
 
-    if (qcontrast->delay < options.adjusterMaxDelay) {
-        qcontrast->delay = options.adjusterMaxDelay;
-    }
+    qcontrast->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     qcontrast->throwOnButtonRelease();
     qcontrast->set_tooltip_markup (M ("TP_COLORAPP_CONTRAST_Q_TOOLTIP"));
@@ -468,9 +446,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     colorh = Gtk::manage (new Adjuster (M ("TP_COLORAPP_HUE"), -100.0, 100.0, 0.1, 0.));
 
-    if (colorh->delay < options.adjusterMaxDelay) {
-        colorh->delay = options.adjusterMaxDelay;
-    }
+    colorh->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     colorh->throwOnButtonRelease();
     colorh->set_tooltip_markup (M ("TP_COLORAPP_HUE_TOOLTIP"));
@@ -618,9 +594,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 //   adaplum = Gtk::manage (new Adjuster (M ("TP_COLORAPP_ABSOLUTELUMINANCE"), 0.1,  16384., 0.1,   16.));
     adaplum = Gtk::manage (new Adjuster (M ("TP_COLORAPP_ABSOLUTELUMINANCE"), MINLA0, MAXLA0, 0.01, 16, NULL, NULL, &wbSlider2la, &wbla2Slider));
 
-    if (adaplum->delay < options.adjusterMaxDelay) {
-        adaplum->delay = options.adjusterMaxDelay;
-    }
+    adaplum->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     adaplum->throwOnButtonRelease();
     adaplum->set_tooltip_markup (M ("TP_COLORAPP_VIEWING_ABSOLUTELUMINANCE_TOOLTIP"));
@@ -631,9 +605,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
 
     degreeout  = Gtk::manage (new Adjuster (M ("TP_COLORAPP_CIECAT_DEGREE"),    0.,  100.,  1.,   90.));
 
-    if (degreeout->delay < options.adjusterMaxDelay) {
-        degreeout->delay = options.adjusterMaxDelay;
-    }
+    degreeout->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     degreeout->throwOnButtonRelease();
     degreeout->addAutoButton (M ("TP_COLORAPP_CAT02ADAPTATION_TOOLTIP"));
@@ -694,9 +666,7 @@ ColorAppearance::ColorAppearance () : FoldableToolPanel (this, "colorappearance"
     */
     badpixsl = Gtk::manage (new Adjuster (M ("TP_COLORAPP_BADPIXSL"), 0,  2, 1,  0));
 
-    if (badpixsl->delay < options.adjusterMaxDelay) {
-        badpixsl->delay = options.adjusterMaxDelay;
-    }
+    badpixsl->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     badpixsl->throwOnButtonRelease();
     badpixsl->set_tooltip_markup (M ("TP_COLORAPP_BADPIXSL_TOOLTIP"));
diff --git a/rtgui/colortoning.cc b/rtgui/colortoning.cc
index ddf917149..77bc31638 100644
--- a/rtgui/colortoning.cc
+++ b/rtgui/colortoning.cc
@@ -488,11 +488,11 @@ ColorToning::ColorToning () : FoldableToolPanel(this, "colortoning", M("TP_COLOR
 
     pack_start(*labRegionBox, Gtk::PACK_EXPAND_WIDGET, 4);
 
-    labRegionSaturation->delay = options.adjusterMaxDelay;
-    labRegionSlope->delay = options.adjusterMaxDelay;
-    labRegionOffset->delay = options.adjusterMaxDelay;
-    labRegionPower->delay = options.adjusterMaxDelay;
-    labRegionMaskBlur->delay = options.adjusterMaxDelay;
+    labRegionSaturation->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
+    labRegionSlope->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
+    labRegionOffset->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
+    labRegionPower->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
+    labRegionMaskBlur->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
     //------------------------------------------------------------------------
 
     show_all();
diff --git a/rtgui/delayed.h b/rtgui/delayed.h
new file mode 100644
index 000000000..b57d7300b
--- /dev/null
+++ b/rtgui/delayed.h
@@ -0,0 +1,240 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (C) 2020 Flössie <floessie.mail@gmail.com>
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  RawTherapee 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.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <cstddef>
+#include <functional>
+#include <tuple>
+
+#include <glibmm/main.h>
+#include <glibmm/signalproxy.h>
+
+#include "../rtengine/noncopyable.h"
+
+namespace delayed_helper
+{
+
+    // C++14
+
+    // See https://gist.github.com/ntessore/dc17769676fb3c6daa1f
+    template<std::size_t... Is>
+    struct index_sequence
+    {
+    };
+
+    template<std::size_t N, std::size_t... Is>
+    struct make_index_sequence :
+        make_index_sequence<N-1, N-1, Is...>
+    {
+    };
+
+    template<std::size_t... Is>
+    struct make_index_sequence<0, Is...> :
+        index_sequence<Is...>
+    {
+    };
+
+    // C++17
+
+    // See https://aherrmann.github.io/programming/2016/02/28/unpacking-tuples-in-cpp14/
+    template<typename F, typename T, size_t... Is>
+    void apply_impl(F f, T t, index_sequence<Is...>)
+    {
+        f(std::get<Is>(t)...);
+    }
+
+    template <typename T, typename F>
+    void apply(F f, T t)
+    {
+        apply_impl(f, t, make_index_sequence<std::tuple_size<T>{}>{});
+    }
+
+}
+
+template<typename... Ts>
+class DelayedCall final :
+    public rtengine::NonCopyable
+{
+public:
+    DelayedCall(std::function<void (Ts...)> _function, unsigned int _min_delay_ms, unsigned int _max_delay_ms = 0) :
+        function(_function),
+        min_delay_ms(_min_delay_ms),
+        max_delay_ms(_max_delay_ms)
+    {
+    }
+
+    DelayedCall(unsigned int _min_delay_ms, unsigned int _max_delay_ms = 0) :
+        DelayedCall({}, _min_delay_ms, _max_delay_ms)
+    {
+    }
+
+    void setFunction(std::function<void (Ts...)> function)
+    {
+        this->function = function;
+    }
+
+    void operator ()(Ts... ts)
+    {
+        if (!function) {
+            return;
+        }
+
+        if (!min_delay_ms) {
+            function(ts...);
+            return;
+        }
+
+        params = std::make_tuple(ts...);
+
+        min_timeout.disconnect();
+        min_timeout = Glib::signal_timeout().connect(sigc::mem_fun(*this, &DelayedCall::onMinTimeout), min_delay_ms);
+
+        if (max_delay_ms && !max_timeout.connected()) {
+            max_timeout = Glib::signal_timeout().connect(sigc::mem_fun(*this, &DelayedCall::onMaxTimeout), max_delay_ms);
+        }
+    }
+
+    void cancel()
+    {
+        min_timeout.disconnect();
+        max_timeout.disconnect();
+    }
+
+private:
+    bool onMinTimeout()
+    {
+        max_timeout.disconnect();
+        if (function) {
+            delayed_helper::apply(function, params);
+        }
+        return false;
+    }
+
+    bool onMaxTimeout()
+    {
+        min_timeout.disconnect();
+        if (function) {
+            delayed_helper::apply(function, params);
+        }
+        return false;
+    }
+
+    std::function<void (Ts...)> function;
+
+    unsigned int min_delay_ms;
+    unsigned int max_delay_ms;
+
+    sigc::connection min_timeout;
+    sigc::connection max_timeout;
+
+    std::tuple<Ts...> params;
+};
+
+template<typename... Ts>
+class DelayedConnection final :
+    public rtengine::NonCopyable
+{
+public:
+    DelayedConnection(unsigned int _min_delay_ms, unsigned int _max_delay_ms = 0) :
+        min_delay_ms(_min_delay_ms),
+        max_delay_ms(_max_delay_ms)
+    {
+    }
+
+    void connect(Glib::SignalProxy<void, Ts...> signal, const sigc::slot<void, Ts...>& slot, const sigc::slot<void, Ts...>& immediate_slot = {})
+    {
+        this->slot = slot;
+        this->immediate_slot = immediate_slot;
+        this->signal = signal.connect(sigc::mem_fun(*this, &DelayedConnection::onSignal));
+    }
+
+    void block(bool value = true)
+    {
+        signal.block(value);
+    }
+
+    void unblock()
+    {
+        signal.unblock();
+    }
+
+    void cancel()
+    {
+        min_timeout.disconnect();
+        max_timeout.disconnect();
+    }
+
+    void setDelay(unsigned int min_delay_ms, unsigned int max_delay_ms = 0)
+    {
+        this->min_delay_ms = min_delay_ms;
+        this->max_delay_ms = max_delay_ms;
+
+        min_timeout.disconnect();
+        max_timeout.disconnect();
+    }
+
+private:
+    void onSignal(Ts... ts)
+    {
+        if (immediate_slot) {
+            immediate_slot(ts...);
+        }
+
+        if (!min_delay_ms) {
+            slot(ts...);
+            return;
+        }
+
+        params = std::make_tuple(ts...);
+
+        min_timeout.disconnect();
+        min_timeout = Glib::signal_timeout().connect(sigc::mem_fun(*this, &DelayedConnection::onMinTimeout), min_delay_ms);
+
+        if (max_delay_ms && !max_timeout.connected()) {
+            max_timeout = Glib::signal_timeout().connect(sigc::mem_fun(*this, &DelayedConnection::onMaxTimeout), max_delay_ms);
+        }
+    }
+
+    bool onMinTimeout()
+    {
+        max_timeout.disconnect();
+        delayed_helper::apply(slot, params);
+        return false;
+    }
+
+    bool onMaxTimeout()
+    {
+        min_timeout.disconnect();
+        delayed_helper::apply(slot, params);
+        return false;
+    }
+
+    unsigned int min_delay_ms;
+    unsigned int max_delay_ms;
+
+    sigc::connection signal;
+    sigc::connection min_timeout;
+    sigc::connection max_timeout;
+
+    sigc::slot<void, Ts...> slot;
+    sigc::slot<void, Ts...> immediate_slot;
+
+    std::tuple<Ts...> params;
+};
diff --git a/rtgui/filmnegative.cc b/rtgui/filmnegative.cc
index 1b105a3ec..d70c2a067 100644
--- a/rtgui/filmnegative.cc
+++ b/rtgui/filmnegative.cc
@@ -36,9 +36,7 @@ Adjuster* createExponentAdjuster(AdjusterListener* listener, const Glib::ustring
     adj->setAdjusterListener(listener);
     adj->setLogScale(6, 1, true);
 
-    if (adj->delay < options.adjusterMaxDelay) {
-        adj->delay = options.adjusterMaxDelay;
-    }
+    adj->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     adj->show();
     return adj;
diff --git a/rtgui/flatfield.cc b/rtgui/flatfield.cc
index 7433fd4de..69d14c463 100644
--- a/rtgui/flatfield.cc
+++ b/rtgui/flatfield.cc
@@ -47,9 +47,7 @@ FlatField::FlatField () : FoldableToolPanel(this, "flatfield", M("TP_FLATFIELD_L
     flatFieldBlurRadius = Gtk::manage(new Adjuster (M("TP_FLATFIELD_BLURRADIUS"), 0, 200, 2, 32));
     flatFieldBlurRadius->setAdjusterListener (this);
 
-    if (flatFieldBlurRadius->delay < options.adjusterMaxDelay) {
-        flatFieldBlurRadius->delay = options.adjusterMaxDelay;
-    }
+    flatFieldBlurRadius->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     flatFieldBlurRadius->show();
 
@@ -67,9 +65,7 @@ FlatField::FlatField () : FoldableToolPanel(this, "flatfield", M("TP_FLATFIELD_L
     flatFieldClipControl->setAdjusterListener(this);
     flatFieldClipControl->addAutoButton("");
 
-    if (flatFieldClipControl->delay < options.adjusterMaxDelay) {
-        flatFieldClipControl->delay = options.adjusterMaxDelay;
-    }
+    flatFieldClipControl->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     flatFieldClipControl->show();
     flatFieldClipControl->set_tooltip_markup (M("TP_FLATFIELD_CLIPCONTROL_TOOLTIP"));
diff --git a/rtgui/histogrampanel.cc b/rtgui/histogrampanel.cc
index b1c0b62df..62be4c1f4 100644
--- a/rtgui/histogrampanel.cc
+++ b/rtgui/histogrampanel.cc
@@ -32,7 +32,22 @@ using namespace rtengine;
 //
 //
 // HistogramPanel
-HistogramPanel::HistogramPanel ()
+HistogramPanel::HistogramPanel() :
+    pointer_moved_delayed_call(
+        [this](bool validPos, const Glib::ustring &profile, const Glib::ustring &profileW, int r, int g, int b)
+        {
+            if (!validPos) {
+                // do something to un-show vertical bars
+                histogramRGBArea->updateBackBuffer(-1, -1, -1);
+            } else {
+                // do something to show vertical bars
+                histogramRGBArea->updateBackBuffer(r, g, b, profile, profileW);
+            }
+            histogramRGBArea->queue_draw ();
+        },
+        50,
+        100
+    )
 {
     setExpandAlignProperties(this, true, true, Gtk::ALIGN_FILL, Gtk::ALIGN_FILL);
     set_name("HistogramPanel");
@@ -192,6 +207,8 @@ HistogramPanel::HistogramPanel ()
 
 HistogramPanel::~HistogramPanel ()
 {
+    pointer_moved_delayed_call.cancel();
+
     delete redImage;
     delete greenImage;
     delete blueImage;
@@ -311,15 +328,7 @@ void HistogramPanel::setHistRGBInvalid ()
 
 void HistogramPanel::pointerMoved (bool validPos, const Glib::ustring &profile, const Glib::ustring &profileW, int x, int y, int r, int g, int b, bool isRaw)
 {
-
-    if (!validPos) {
-        // do something to un-show vertical bars
-        histogramRGBArea->updateBackBuffer(-1, -1, -1);
-    } else {
-        // do something to show vertical bars
-        histogramRGBArea->updateBackBuffer(r, g, b, profile, profileW);
-    }
-    histogramRGBArea->queue_draw ();
+    pointer_moved_delayed_call(validPos, profile, profileW, r, g, b);
 }
 
 /*
@@ -372,7 +381,6 @@ HistogramRGBArea::HistogramRGBArea () :
     needLuma(options.histogramLuma), needChroma(options.histogramChroma), rawMode(options.histogramRAW),
     showMode(options.histogramBar), barDisplayed(options.histogramBar), parent(nullptr)
 {
-
     get_style_context()->add_class("drawingarea");
     set_name("HistogramRGBArea");
 
diff --git a/rtgui/histogrampanel.h b/rtgui/histogrampanel.h
index 2a29ded9a..740b0a12c 100644
--- a/rtgui/histogrampanel.h
+++ b/rtgui/histogrampanel.h
@@ -24,6 +24,7 @@
 
 #include <cairomm/cairomm.h>
 
+#include "delayed.h"
 #include "guiutils.h"
 #include "pointermotionlistener.h"
 
@@ -180,6 +181,8 @@ private:
 
 class HistogramPanel final : public Gtk::Grid, public PointerMotionListener, public DrawModeListener, public rtengine::NonCopyable
 {
+private:
+    DelayedCall<bool, Glib::ustring, Glib::ustring, int, int, int> pointer_moved_delayed_call;
 
 protected:
 
diff --git a/rtgui/iccprofilecreator.cc b/rtgui/iccprofilecreator.cc
index c9639f70b..3f1ed4089 100644
--- a/rtgui/iccprofilecreator.cc
+++ b/rtgui/iccprofilecreator.cc
@@ -151,9 +151,7 @@ ICCProfileCreator::ICCProfileCreator(RTWindow *rtwindow)
     aGamma = Gtk::manage(new Adjuster(M("ICCPROFCREATOR_GAMMA"), 1, 3.5, 0.00001, 2.4));
     setExpandAlignProperties(aGamma, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_BASELINE);
 
-    if (aGamma->delay < options.adjusterMaxDelay) {
-        aGamma->delay = options.adjusterMaxDelay;
-    }
+    aGamma->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     aGamma->show();
     mainGrid->attach(*aGamma, 1, 3, 1, 1); //gamma
@@ -161,9 +159,7 @@ ICCProfileCreator::ICCProfileCreator(RTWindow *rtwindow)
     aSlope = Gtk::manage(new Adjuster(M("ICCPROFCREATOR_SLOPE"), 0, 15, 0.00001, 12.92310));
     setExpandAlignProperties(aSlope, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_BASELINE);
 
-    if (aSlope->delay < options.adjusterMaxDelay) {
-        aSlope->delay = options.adjusterMaxDelay;
-    }
+    aSlope->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     aSlope->show();
     mainGrid->attach(*aSlope, 1, 4, 1, 1); //slope
@@ -328,7 +324,7 @@ ICCProfileCreator::ICCProfileCreator(RTWindow *rtwindow)
     close->signal_clicked().connect(sigc::mem_fun(*this, &ICCProfileCreator::closePressed));
     get_action_area()->pack_start(*close);
 
-    //--------------- Show childrens
+    //--------------- Show children
 
     show_all_children();
 
diff --git a/rtgui/icmpanel.cc b/rtgui/icmpanel.cc
index 3e3c0508c..920924c6c 100644
--- a/rtgui/icmpanel.cc
+++ b/rtgui/icmpanel.cc
@@ -214,13 +214,9 @@ ICMPanel::ICMPanel() : FoldableToolPanel(this, "icm", M("TP_ICM_LABEL")), iuncha
     wGamma->setAdjusterListener(this);
     wSlope->setAdjusterListener(this);
 
-    if (wGamma->delay < options.adjusterMaxDelay) {
-        wGamma->delay = options.adjusterMaxDelay;
-    }
+    wGamma->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
-    if (wSlope->delay < options.adjusterMaxDelay) {
-        wSlope->delay = options.adjusterMaxDelay;
-    }
+    wSlope->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     wFrame->add(*wProfVBox);
 
diff --git a/rtgui/navigator.cc b/rtgui/navigator.cc
index 619ea0cfd..9397cfc67 100644
--- a/rtgui/navigator.cc
+++ b/rtgui/navigator.cc
@@ -26,8 +26,50 @@
 
 using namespace rtengine;
 
-Navigator::Navigator () : currentRGBUnit(options.navRGBUnit), currentHSVUnit(options.navHSVUnit)
+Navigator::Navigator() :
+    pointer_moved_delayed_call(50, 100),
+    currentRGBUnit(options.navRGBUnit),
+    currentHSVUnit(options.navHSVUnit)
 {
+    pointer_moved_delayed_call.setFunction(
+        [this](bool validPos, Glib::ustring profile, Glib::ustring profileW, int x, int y, int r, int g, int b, bool isRaw)
+        {
+            if (!validPos) {
+                setInvalid (x, y);
+            } else {
+                Glib::ustring s1, s2, s3;
+
+                position->set_text (Glib::ustring::compose ("x: %1, y: %2", x, y));
+
+                getRGBText (r, g, b, s1, s2, s3, isRaw);
+                R->set_text (s1);
+                G->set_text (s2);
+                B->set_text (s3);
+                if (isRaw) {
+                    H->set_text ("--");
+                    S->set_text ("--");
+                    V->set_text ("--");
+                    LAB_L->set_text ("--");
+                    LAB_A->set_text ("--");
+                    LAB_B->set_text ("--");
+                } else {
+                    float h, s, v;
+                    float LAB_a, LAB_b, LAB_l;
+                    Color::rgb2hsv01(r / 255.f, g / 255.f, b / 255.f, h, s, v);
+                    getHSVText (h, s, v, s1, s2, s3);
+                    H->set_text (s1);
+                    S->set_text (s2);
+                    V->set_text (s3);
+
+                    Color::rgb2lab01(profile, profileW, r / 255.f, g / 255.f, b / 255.f, LAB_l, LAB_a, LAB_b, options.rtSettings.HistogramWorking);  // TODO: Really sure this function works?
+                    getLABText (LAB_l, LAB_a, LAB_b, s1, s2, s3);
+                    LAB_L->set_text (s1);
+                    LAB_A->set_text (s2);
+                    LAB_B->set_text (s3);
+                }
+            }
+        }
+    );
 
     set_label (M("MAIN_MSG_NAVIGATOR"));
     Gtk::VBox* mbox = Gtk::manage (new Gtk::VBox ());
@@ -202,6 +244,11 @@ Navigator::Navigator () : currentRGBUnit(options.navRGBUnit), currentHSVUnit(opt
     show_all ();
 }
 
+Navigator::~Navigator()
+{
+    pointer_moved_delayed_call.cancel();
+}
+
 void Navigator::setInvalid (int fullWidth, int fullHeight)
 {
     if (fullWidth > 0 && fullHeight > 0) {
@@ -278,41 +325,7 @@ void Navigator::getLABText (float l, float a, float b, Glib::ustring &sL, Glib::
 // if !validPos then x/y contain the full image size
 void Navigator::pointerMoved (bool validPos, const Glib::ustring &profile, const Glib::ustring &profileW, int x, int y, int r, int g, int b, bool isRaw)
 {
-
-    if (!validPos) {
-        setInvalid (x, y);
-    } else {
-        Glib::ustring s1, s2, s3;
-
-        position->set_text (Glib::ustring::compose ("x: %1, y: %2", x, y));
-
-        getRGBText (r, g, b, s1, s2, s3, isRaw);
-        R->set_text (s1);
-        G->set_text (s2);
-        B->set_text (s3);
-        if (isRaw) {
-            H->set_text ("--");
-            S->set_text ("--");
-            V->set_text ("--");
-            LAB_L->set_text ("--");
-            LAB_A->set_text ("--");
-            LAB_B->set_text ("--");
-        } else {
-            float h, s, v;
-            float LAB_a, LAB_b, LAB_l;
-            Color::rgb2hsv01(r / 255.f, g / 255.f, b / 255.f, h, s, v);
-            getHSVText (h, s, v, s1, s2, s3);
-            H->set_text (s1);
-            S->set_text (s2);
-            V->set_text (s3);
-
-            Color::rgb2lab01(profile, profileW, r / 255.f, g / 255.f, b / 255.f, LAB_l, LAB_a, LAB_b, options.rtSettings.HistogramWorking);  // TODO: Really sure this function works?
-            getLABText (LAB_l, LAB_a, LAB_b, s1, s2, s3);
-            LAB_L->set_text (s1);
-            LAB_A->set_text (s2);
-            LAB_B->set_text (s3);
-        }
-    }
+    pointer_moved_delayed_call(validPos, profile, profileW, x, y, r, g, b, isRaw);
 }
 
 void Navigator::cycleUnitsRGB (GdkEventButton *event) {
diff --git a/rtgui/navigator.h b/rtgui/navigator.h
index e9d40e309..4c2a3fd32 100644
--- a/rtgui/navigator.h
+++ b/rtgui/navigator.h
@@ -20,6 +20,7 @@
 
 #include <gtkmm.h>
 
+#include "delayed.h"
 #include "options.h"
 #include "pointermotionlistener.h"
 
@@ -33,6 +34,8 @@ class Navigator final :
     typedef const double (*TMatrix)[3];
 
 private:
+    DelayedCall<bool, Glib::ustring, Glib::ustring, int, int, int, int, int, bool> pointer_moved_delayed_call;
+
     Options::NavigatorUnit currentRGBUnit;
     Options::NavigatorUnit currentHSVUnit;
     void cycleUnitsRGB (GdkEventButton *event);
@@ -53,7 +56,8 @@ protected:
 public:
     PreviewWindow* previewWindow;
 
-    Navigator ();
+    Navigator();
+    ~Navigator() override;
 
     // pointermotionlistener interface
     //  void pointerMoved (bool validPos, int x, int y, int r, int g, int b);
diff --git a/rtgui/pdsharpening.cc b/rtgui/pdsharpening.cc
index 8bbf19620..1b98fd3ac 100644
--- a/rtgui/pdsharpening.cc
+++ b/rtgui/pdsharpening.cc
@@ -81,10 +81,10 @@ PdSharpening::PdSharpening() :
     dradiusOffset->setAdjusterListener(this);
     diter->setAdjusterListener(this);
 
-    contrast->delay = std::max(contrast->delay, options.adjusterMaxDelay);
-    dradius->delay = std::max(dradius->delay, options.adjusterMaxDelay);
-    dradiusOffset->delay = std::max(dradiusOffset->delay, options.adjusterMaxDelay);
-    diter->delay = std::max(diter->delay, options.adjusterMaxDelay);
+    contrast->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
+    dradius->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
+    dradiusOffset->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
+    diter->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 }
 
 PdSharpening::~PdSharpening()
diff --git a/rtgui/preprocess.cc b/rtgui/preprocess.cc
index 4a663ad07..f33a87a28 100644
--- a/rtgui/preprocess.cc
+++ b/rtgui/preprocess.cc
@@ -46,9 +46,7 @@ PreProcess::PreProcess () : FoldableToolPanel(this, "preprocess", M("TP_PREPROCE
     hdThreshold->set_tooltip_markup (M("TP_RAW_HD_TOOLTIP"));
     hdThreshold->setAdjusterListener (this);
 
-    if (hdThreshold->delay < options.adjusterMaxDelay) {
-        hdThreshold->delay = options.adjusterMaxDelay;
-    }
+    hdThreshold->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     hdThreshold->show();
     pack_start( *hdThreshold, Gtk::PACK_SHRINK, 4);
diff --git a/rtgui/rawcacorrection.cc b/rtgui/rawcacorrection.cc
index 9e5c592ef..58c7995f9 100644
--- a/rtgui/rawcacorrection.cc
+++ b/rtgui/rawcacorrection.cc
@@ -47,24 +47,18 @@ RAWCACorr::RAWCACorr () : FoldableToolPanel(this, "rawcacorrection", M("TP_RAWCA
     caAutoiterations->setAdjusterListener (this);
     caAutoiterations->set_tooltip_markup(M("TP_RAWCACORR_AUTOIT_TOOLTIP"));
 
-    if (caAutoiterations->delay < options.adjusterMaxDelay) {
-        caAutoiterations->delay = options.adjusterMaxDelay;
-    }
+    caAutoiterations->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     caRed = Gtk::manage(new Adjuster (M("TP_RAWCACORR_CARED"), -4.0, 4.0, 0.1, 0, icaredL, icaredR));
     caRed->setAdjusterListener (this);
 
-    if (caRed->delay < options.adjusterMaxDelay) {
-        caRed->delay = options.adjusterMaxDelay;
-    }
+    caRed->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     caRed->show();
     caBlue = Gtk::manage(new Adjuster (M("TP_RAWCACORR_CABLUE"), -8.0, 8.0, 0.1, 0, icablueL, icablueR));
     caBlue->setAdjusterListener (this);
 
-    if (caBlue->delay < options.adjusterMaxDelay) {
-        caBlue->delay = options.adjusterMaxDelay;
-    }
+    caBlue->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     caBlue->show();
 
diff --git a/rtgui/rawexposure.cc b/rtgui/rawexposure.cc
index 7548bf4be..7b5ecabc9 100644
--- a/rtgui/rawexposure.cc
+++ b/rtgui/rawexposure.cc
@@ -33,9 +33,7 @@ RAWExposure::RAWExposure () : FoldableToolPanel(this, "rawexposure", M("TP_EXPOS
     PexPos = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_LINEAR"), 0.1, 16.0, 0.01, 1));
     PexPos->setAdjusterListener (this);
 
-    if (PexPos->delay < options.adjusterMaxDelay) {
-        PexPos->delay = options.adjusterMaxDelay;
-    }
+    PexPos->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexPos->show();
     pack_start( *PexPos, Gtk::PACK_SHRINK, 4);//exposi
diff --git a/rtgui/retinex.cc b/rtgui/retinex.cc
index feab8e6a5..ec250d69b 100644
--- a/rtgui/retinex.cc
+++ b/rtgui/retinex.cc
@@ -502,112 +502,58 @@ Retinex::Retinex () : FoldableToolPanel (this, "retinex", M ("TP_RETINEX_LABEL")
 
 
     str->setAdjusterListener (this);
-
-    if (str->delay < 200) {
-        str->delay = 200;
-    }
+    str->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     scal->setAdjusterListener (this);
-
-    if (scal->delay < 200) {
-        scal->delay = 200;
-    }
+    scal->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     iter->setAdjusterListener (this);
-
-    if (iter->delay < 200) {
-        iter->delay = 200;
-    }
+    iter->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     grad->setAdjusterListener (this);
-
-    if (grad->delay < 200) {
-        grad->delay = 200;
-    }
+    grad->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     grads->setAdjusterListener (this);
-
-    if (grads->delay < 200) {
-        grads->delay = 200;
-    }
+    grads->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     gam->setAdjusterListener (this);
-
-    if (gam->delay < 500) {
-        gam->delay = 500;
-    }
+    gam->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay) * 2.5f);
 
     slope->setAdjusterListener (this);
-
-    if (slope->delay < 500) {
-        slope->delay = 500;
-    }
+    slope->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay) * 2.5f);
 
     neigh->setAdjusterListener (this);
-
-    if (neigh->delay < 200) {
-        neigh->delay = 200;
-    }
+    neigh->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     offs->setAdjusterListener (this);
-
-    if (offs->delay < 200) {
-        offs->delay = 200;
-    }
+    offs->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     vart->setAdjusterListener (this);
-
-    if (vart->delay < 200) {
-        vart->delay = 200;
-    }
+    offs->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     limd->setAdjusterListener (this);
-
-    if (limd->delay < 200) {
-        limd->delay = 200;
-    }
+    limd->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     highl->setAdjusterListener (this);
-
-    if (highl->delay < 200) {
-        highl->delay = 200;
-    }
+    highl->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     radius->setAdjusterListener (this);
-
-    if (radius->delay < 200) {
-        radius->delay = 200;
-    }
+    radius->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     highlights->setAdjusterListener (this);
-
-    if (highlights->delay < 200) {
-        highlights->delay = 200;
-    }
+    highlights->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     h_tonalwidth->setAdjusterListener (this);
-
-    if (h_tonalwidth->delay < 200) {
-        h_tonalwidth->delay = 200;
-    }
+    h_tonalwidth->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     shadows->setAdjusterListener (this);
-
-    if (shadows->delay < 200) {
-        shadows->delay = 200;
-    }
+    shadows->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     s_tonalwidth->setAdjusterListener (this);
-
-    if (s_tonalwidth->delay < 200) {
-        s_tonalwidth->delay = 200;
-    }
+    s_tonalwidth->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     skal->setAdjusterListener (this);
-
-    if (skal->delay < 200) {
-        skal->delay = 200;
-    }
+    skal->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     disableListener();
     retinexColorSpaceChanged();
diff --git a/rtgui/sharpenedge.cc b/rtgui/sharpenedge.cc
index f4415bb15..552169fc1 100644
--- a/rtgui/sharpenedge.cc
+++ b/rtgui/sharpenedge.cc
@@ -36,16 +36,12 @@ SharpenEdge::SharpenEdge () : FoldableToolPanel(this, "sharpenedge", M("TP_SHARP
     passes = Gtk::manage(new Adjuster (M("TP_SHARPENEDGE_PASSES"), 1, 4, 1, 2));
     passes->setAdjusterListener (this);
 
-    if (passes->delay < options.adjusterMaxDelay) {
-        passes->delay = options.adjusterMaxDelay;
-    }
+    passes->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     amount = Gtk::manage(new Adjuster (M("TP_SHARPENEDGE_AMOUNT"), 0, 100, 1, 50));
     amount->setAdjusterListener (this);
 
-    if (amount->delay < options.adjusterMaxDelay) {
-        amount->delay = options.adjusterMaxDelay;
-    }
+    amount->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     threechannels = Gtk::manage(new Gtk::CheckButton((M("TP_SHARPENEDGE_THREE"))));// L + a + b
     threechannels->set_active (false);
diff --git a/rtgui/xtransprocess.cc b/rtgui/xtransprocess.cc
index a371bad88..db63c68be 100644
--- a/rtgui/xtransprocess.cc
+++ b/rtgui/xtransprocess.cc
@@ -79,9 +79,7 @@ XTransProcess::XTransProcess () : FoldableToolPanel(this, "xtransprocess", M("TP
     dualDemosaicContrast->addAutoButton(M("TP_RAW_DUALDEMOSAICAUTOCONTRAST_TOOLTIP"));
     dualDemosaicContrast->setAutoValue(true);
 
-    if (dualDemosaicContrast->delay < options.adjusterMaxDelay) {
-        dualDemosaicContrast->delay = options.adjusterMaxDelay;
-    }
+    dualDemosaicContrast->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     dualDemosaicContrast->show();
     dualDemosaicOptions->pack_start(*dualDemosaicContrast);
@@ -91,9 +89,7 @@ XTransProcess::XTransProcess () : FoldableToolPanel(this, "xtransprocess", M("TP
     border = Gtk::manage(new Adjuster(M("TP_RAW_BORDER"), 0, 16, 1, 7));
     border->setAdjusterListener (this);
 
-    if (border->delay < options.adjusterMaxDelay) {
-        border->delay = options.adjusterMaxDelay;
-    }
+    border->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     border->show();
     borderbox->pack_start(*border);
@@ -103,9 +99,7 @@ XTransProcess::XTransProcess () : FoldableToolPanel(this, "xtransprocess", M("TP
     ccSteps = Gtk::manage (new Adjuster (M("TP_RAW_FALSECOLOR"), 0, 5, 1, 0 ));
     ccSteps->setAdjusterListener (this);
 
-    if (ccSteps->delay < options.adjusterMaxDelay) {
-        ccSteps->delay = options.adjusterMaxDelay;
-    }
+    ccSteps->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     ccSteps->show();
     pack_start( *ccSteps, Gtk::PACK_SHRINK, 4);
diff --git a/rtgui/xtransrawexposure.cc b/rtgui/xtransrawexposure.cc
index 28059e69c..655a036c7 100644
--- a/rtgui/xtransrawexposure.cc
+++ b/rtgui/xtransrawexposure.cc
@@ -33,25 +33,19 @@ XTransRAWExposure::XTransRAWExposure () : FoldableToolPanel(this, "xtransrawexpo
     PexBlackRed = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_BLACK_RED"), -2048, 2048, 1.0, 0)); //black level
     PexBlackRed->setAdjusterListener (this);
 
-    if (PexBlackRed->delay < options.adjusterMaxDelay) {
-        PexBlackRed->delay = options.adjusterMaxDelay;
-    }
+    PexBlackRed->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexBlackRed->show();
     PexBlackGreen = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_BLACK_GREEN"), -2048, 2048, 1.0, 0)); //black level
     PexBlackGreen->setAdjusterListener (this);
 
-    if (PexBlackGreen->delay < options.adjusterMaxDelay) {
-        PexBlackGreen->delay = options.adjusterMaxDelay;
-    }
+    PexBlackGreen->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexBlackGreen->show();
     PexBlackBlue = Gtk::manage(new Adjuster (M("TP_RAWEXPOS_BLACK_BLUE"), -2048, 2048, 1.0, 0)); //black level
     PexBlackBlue->setAdjusterListener (this);
 
-    if (PexBlackBlue->delay < options.adjusterMaxDelay) {
-        PexBlackBlue->delay = options.adjusterMaxDelay;
-    }
+    PexBlackBlue->setDelay(std::max(options.adjusterMinDelay, options.adjusterMaxDelay));
 
     PexBlackBlue->show();