New MousePointer to change behavior of mouse

Initial implementation, mostly replicating GLMixer features. 5 Modes; default, linear, spring, wiggly and metronome. Save in Settings. Selection in Navigation panel.

src/CMakeLists.txt

@@ -96,6 +96,7 @@ set(VMIX_SRCS
     MultiFileRecorder.cpp
     DisplaysView.cpp
     ScreenCaptureSource.cpp
+    MousePointer.cpp
 )
 
 #####

src/ImGuiToolkit.cpp

@@ -437,6 +437,41 @@ bool ImGuiToolkit::IconToggle(int i, int j, int i_toggle, int j_toggle, bool* to
 }
 
 
+bool ImGuiToolkit::IconToggle(int i, int j, bool* toggle, const char *tooltip, const char* shortcut)
+{
+    ImGuiWindow* window = ImGui::GetCurrentWindow();
+    if (window->SkipItems)
+        return false;
+
+    ImGui::PushID( i * 20 + j  + ( tooltip ? window->GetID(tooltip) : 0) );
+
+    float frame_height = ImGui::GetFrameHeight();
+    ImVec2 draw_pos = ImGui::GetCursorScreenPos();
+
+    // toggle action : operate on the whole area
+    bool ret = false;
+    ImGui::InvisibleButton("##iconijtogglebutton", ImVec2(frame_height, frame_height));
+    if (ImGui::IsItemClicked()) {
+        *toggle = !*toggle;
+        ret = true;
+    }
+    if (tooltip != nullptr && ImGui::IsItemHovered())
+        ImGuiToolkit::ToolTip(tooltip, shortcut);
+
+    ImGui::SetCursorScreenPos(draw_pos);
+
+    // draw with hovered color
+    const ImVec4* colors = ImGui::GetStyle().Colors;
+    ImGui::PushStyleColor( ImGuiCol_Text, *toggle ? colors[ImGuiCol_DragDropTarget] : colors[ImGuiCol_Text] );
+    ImGui::PushStyleColor( ImGuiCol_Text, ImGui::IsItemHovered() ? colors[ImGuiCol_NavHighlight] : colors[ImGuiCol_Text] );
+//    ImGui::Text("%s", icon);
+    Icon(i, j, !ret);
+    ImGui::PopStyleColor(2);
+
+    ImGui::PopID();
+    return ret;
+}
+
 bool ImGuiToolkit::IconToggle(const char* icon, bool* toggle, const char *tooltip, const char* shortcut)
 {
     bool ret = false;

src/ImGuiToolkit.h

@@ -20,6 +20,7 @@ namespace ImGuiToolkit
     bool IconButton (const char* icon, const char *tooltips = nullptr, const char *shortcut = nullptr);
     bool IconMultistate (std::vector<std::pair<int, int> > icons, int* state, std::vector<std::string> tooltips);
     bool IconToggle (int i, int j, int i_toggle, int j_toggle, bool* toggle, const char *tooltips[] = nullptr);
+    bool IconToggle (int i, int j, bool* toggle, const char *tooltip = nullptr, const char *shortcut = nullptr);
     bool IconToggle (const char* icon, bool* toggle, const char *tooltip = nullptr, const char *shortcut = nullptr);
     void ShowIconsWindow(bool* p_open);
 

src/MousePointer.cpp

@@ -0,0 +1,247 @@
+/*
+ * This file is part of vimix - video live mixer
+ *
+ * **Copyright** (C) 2019-2023 Bruno Herbelin <bruno.herbelin@gmail.com>
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+**/
+
+#include <glm/gtc/random.hpp> // for diskRand
+
+#include "imgui.h"
+
+#include "Metronome.h"
+#include "MousePointer.h"
+
+std::vector< std::tuple<int, int, std::string> > Pointer::Modes = {
+    { ICON_POINTER_DEFAULT, std::string("Default") },
+    { ICON_POINTER_LINEAR,  std::string("Linear") },
+    { ICON_POINTER_SPRING,  std::string("Spring") },
+    { ICON_POINTER_WIGGLY,  std::string("Wiggly") },
+    { ICON_POINTER_METRONOME, std::string("Metronome") }
+};
+
+#define POINTER_LINEAR_MIN_SPEED 40.f
+#define POINTER_LINEAR_MAX_SPEED 800.f
+#define POINTER_LINEAR_THICKNESS 4.f
+#define POINTER_LINEAR_ARROW 40.f
+
+void PointerLinear::update(glm::vec2 pos, float dt)
+{
+    float speed = POINTER_LINEAR_MIN_SPEED + (POINTER_LINEAR_MAX_SPEED - POINTER_LINEAR_MIN_SPEED) * strength_;
+
+    glm::vec2 delta = pos - pos_ ;
+    if (glm::length(delta) > 10.f )
+        pos_ += glm::normalize(delta) * (speed * dt);
+}
+
+void PointerLinear::draw()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    const glm::vec2 start = glm::vec2( io.MousePos.x, io.MousePos.y);
+    const glm::vec2 end   = glm::vec2( pos_.x / io.DisplayFramebufferScale.x, pos_.y / io.DisplayFramebufferScale.y );
+    const ImVec2 _end = ImVec2( end.x, end.y );
+
+    // draw line
+    ImGui::GetBackgroundDrawList()->AddLine(io.MousePos, _end, ImGui::GetColorU32(ImGuiCol_HeaderActive), POINTER_LINEAR_THICKNESS);
+    ImGui::GetBackgroundDrawList()->AddCircleFilled(_end, 6.0, ImGui::GetColorU32(ImGuiCol_HeaderActive));
+
+    // direction vector
+    glm::vec2 delta = start - end;
+    float l = glm::length(delta);
+    delta = glm::normalize( delta );
+
+    // draw dots regularly to show speed
+    for (float p = 0.f; p < l; p += 200.f * (strength_ + 0.1f)) {
+        glm::vec2 point = start - delta * p;
+        ImGui::GetBackgroundDrawList()->AddCircleFilled(ImVec2(point.x,point.y), 4.0, ImGui::GetColorU32(ImGuiCol_HeaderActive));
+    }
+
+    // draw arrow head
+    if ( l > POINTER_LINEAR_ARROW * 1.5f) {
+        glm::vec2 ortho = glm::normalize( glm::vec2( glm::cross( glm::vec3(delta, 0.f), glm::vec3(0.f, 0.f, 1.f)) ));
+        ortho *= POINTER_LINEAR_ARROW;
+        delta *= POINTER_LINEAR_ARROW;
+        const glm::vec2 pointA = start - delta + ortho * 0.5f;
+        const glm::vec2 pointB = start - delta - ortho * 0.5f;
+
+        ImGui::GetBackgroundDrawList()->AddTriangleFilled(io.MousePos, ImVec2(pointA.x, pointA.y),
+                                                          ImVec2(pointB.x, pointB.y), ImGui::GetColorU32(ImGuiCol_HeaderActive));
+    }
+}
+
+#define POINTER_WIGGLY_MIN_RADIUS 30.f
+#define POINTER_WIGGLY_MAX_RADIUS 300.f
+#define POINTER_WIGGLY_SMOOTHING 10
+
+void PointerWiggly::update(glm::vec2 pos, float)
+{
+    float radius = POINTER_WIGGLY_MIN_RADIUS + (POINTER_WIGGLY_MAX_RADIUS - POINTER_WIGGLY_MIN_RADIUS) * strength_;
+
+    // change pos to a random point in a close radius
+    pos += glm::diskRand( radius );
+
+    // smooth a little and apply
+    const float emaexp = 2.0 / float( POINTER_WIGGLY_SMOOTHING + 1);
+    pos_ = emaexp * pos + (1.f - emaexp) * pos_;
+}
+
+void PointerWiggly::draw()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    const ImVec2 _end = ImVec2( pos_.x / io.DisplayFramebufferScale.x, pos_.y / io.DisplayFramebufferScale.y );
+    ImGui::GetBackgroundDrawList()->AddLine(io.MousePos, _end, ImGui::GetColorU32(ImGuiCol_HeaderActive), 5.f);
+
+    const float radius = POINTER_WIGGLY_MIN_RADIUS + (POINTER_WIGGLY_MAX_RADIUS - POINTER_WIGGLY_MIN_RADIUS) * strength_;
+    ImGui::GetBackgroundDrawList()->AddCircle(io.MousePos, radius * 0.5f,
+                                              ImGui::GetColorU32(ImGuiCol_HeaderActive), 0, 2.f + 4.f * strength_);
+}
+
+#define POINTER_METRONOME_RADIUS 30.f
+
+void PointerMetronome::update(glm::vec2 pos, float dt)
+{
+    if ( Metronome::manager().timeToBeat() < std::chrono::milliseconds( (uint)floor(dt * 1000.f) )) {
+        pos_ = pos;
+    }
+}
+
+void PointerMetronome::draw()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    const ImVec2 end = ImVec2(pos_.x / io.DisplayFramebufferScale.x, pos_.y / io.DisplayFramebufferScale.y);
+    ImGui::GetBackgroundDrawList()->AddLine(io.MousePos, end, ImGui::GetColorU32(ImGuiCol_HeaderActive), 4.f);
+    ImGui::GetBackgroundDrawList()->AddCircle(io.MousePos, POINTER_METRONOME_RADIUS, ImGui::GetColorU32(ImGuiCol_HeaderActive), 0, 3.f);
+    ImGui::GetBackgroundDrawList()->AddCircleFilled(end, 6.0, ImGui::GetColorU32(ImGuiCol_HeaderActive));
+
+    double t = Metronome::manager().phase();
+    t -= floor(t);
+    ImGui::GetBackgroundDrawList()->AddCircleFilled(io.MousePos, t * POINTER_METRONOME_RADIUS, ImGui::GetColorU32(ImGuiCol_HeaderActive), 0);
+}
+
+#define POINTER_SPRING_MIN_MASS 6.f
+#define POINTER_SPRING_MAX_MASS 40.f
+
+void PointerSpring::initiate(glm::vec2 pos)
+{
+    Pointer::initiate(pos);
+    velocity_ = glm::vec2(0.f);
+}
+
+void PointerSpring::update(glm::vec2 pos, float dt)
+{
+    // percentage of loss of energy at every update
+    const float viscousness = 0.75;
+    // force applied on the mass, as percent of the Maximum mass
+    const float stiffness = 0.8;
+    // damping : opposite direction of force, non proportional to mass
+    const float damping = 60.0;
+    // mass as a percentage of min to max
+    const float mass = POINTER_SPRING_MAX_MASS - (POINTER_SPRING_MAX_MASS - POINTER_SPRING_MIN_MASS) * strength_;
+
+    // compute delta betwen initial and current position
+    glm::vec2 delta = pos - pos_;
+    // apply force on velocity : spring stiffness / mass
+    velocity_ += delta * ( (POINTER_SPRING_MAX_MASS * stiffness) / mass );
+    // apply damping dynamics
+    velocity_ -= damping * dt * glm::normalize(delta);
+    // compute new position : add velocity x time
+    pos_ += dt * velocity_;
+    // diminish velocity by viscousness of substrate
+    // (loss of energy between updates)
+    velocity_ *= viscousness;
+}
+
+void PointerSpring::draw()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    glm::vec2 _start = glm::vec2( io.MousePos.x * io.DisplayFramebufferScale.x, io.MousePos.y * io.DisplayFramebufferScale.y );
+
+    const glm::vec2 delta = pos_ - _start;
+    glm::vec2 ortho = glm::normalize( glm::vec2( glm::cross( glm::vec3(delta, 0.f), glm::vec3(0.f, 0.f, 1.f)) ));
+    ortho *= 0.05f * glm::length( velocity_ );
+
+    // draw a wave with 3 bezier
+    glm::vec2 _third = _start + delta * 1.f / 9.f + ortho;
+    glm::vec2 _twothird = _start + delta * 2.f / 9.f - ortho;
+    glm::vec2 _end = _start + delta * 3.f / 9.f;
+
+    ImVec2 start = ImVec2(_start.x / io.DisplayFramebufferScale.x, _start.y / io.DisplayFramebufferScale.y);
+    ImVec2 third = ImVec2(_third.x / io.DisplayFramebufferScale.x, _third.y / io.DisplayFramebufferScale.y);
+    ImVec2 twothird = ImVec2(_twothird.x / io.DisplayFramebufferScale.x, _twothird.y / io.DisplayFramebufferScale.y);
+    ImVec2 end = ImVec2(_end.x / io.DisplayFramebufferScale.x, _end.y / io.DisplayFramebufferScale.y);
+    ImGui::GetBackgroundDrawList()->AddBezierCurve(start, third, twothird, end,
+                                                   ImGui::GetColorU32(ImGuiCol_HeaderActive), 5.f);
+    _start = _end;
+    _third = _start + delta  * 1.f / 9.f + ortho;
+    _twothird = _start + delta * 2.f / 9.f - ortho;
+    _end = _start + delta * 3.f / 9.f;
+
+    start = ImVec2(_start.x / io.DisplayFramebufferScale.x, _start.y / io.DisplayFramebufferScale.y);
+    third = ImVec2(_third.x / io.DisplayFramebufferScale.x, _third.y / io.DisplayFramebufferScale.y);
+    twothird = ImVec2(_twothird.x / io.DisplayFramebufferScale.x, _twothird.y / io.DisplayFramebufferScale.y);
+    end = ImVec2(_end.x / io.DisplayFramebufferScale.x, _end.y / io.DisplayFramebufferScale.y);
+    ImGui::GetBackgroundDrawList()->AddBezierCurve(start, third, twothird, end,
+                                                   ImGui::GetColorU32(ImGuiCol_HeaderActive), 5.f);
+    _start = _end;
+    _third = _start + delta  * 1.f / 9.f + ortho;
+    _twothird = _start + delta * 2.f / 9.f - ortho;
+
+    start = ImVec2(_start.x / io.DisplayFramebufferScale.x, _start.y / io.DisplayFramebufferScale.y);
+    third = ImVec2(_third.x / io.DisplayFramebufferScale.x, _third.y / io.DisplayFramebufferScale.y);
+    twothird = ImVec2(_twothird.x / io.DisplayFramebufferScale.x, _twothird.y / io.DisplayFramebufferScale.y);
+    end = ImVec2(pos_.x / io.DisplayFramebufferScale.x, pos_.y / io.DisplayFramebufferScale.y);
+    ImGui::GetBackgroundDrawList()->AddBezierCurve(start, third, twothird, end,
+                                                   ImGui::GetColorU32(ImGuiCol_HeaderActive), 5.f);
+
+    // represent the weight with a filled circle
+    float mass = POINTER_SPRING_MAX_MASS - (POINTER_SPRING_MAX_MASS - POINTER_SPRING_MIN_MASS) * strength_;
+    ImGui::GetBackgroundDrawList()->AddCircleFilled(end, mass, ImGui::GetColorU32(ImGuiCol_HeaderActive));
+}
+
+
+MousePointer::MousePointer() : mode_(Pointer::POINTER_DEFAULT), active_(nullptr)
+{
+    active_ = new Pointer;
+}
+
+void MousePointer::setActiveMode(Pointer::Mode m)
+{
+    if (mode_ != m) {
+
+        mode_ = m;
+
+        if (active_)
+            delete active_;
+
+        switch (mode_) {
+        case Pointer::POINTER_SPRING:
+            active_ = new PointerSpring;
+            break;
+        case Pointer::POINTER_METRONOME:
+            active_ = new PointerMetronome;
+            break;
+        case Pointer::POINTER_LINEAR:
+            active_ = new PointerLinear;
+            break;
+        case Pointer::POINTER_WIGGLY:
+            active_ = new PointerWiggly;
+            break;
+        default:
+        case Pointer::POINTER_DEFAULT:
+            active_ = new Pointer;
+            break;
+        }
+    }
+}

src/MousePointer.h

@@ -0,0 +1,106 @@
+#ifndef POINTER_H
+#define POINTER_H
+
+#include <string>
+#include <vector>
+#include <glm/glm.hpp>
+
+#define ICON_POINTER_DEFAULT 7, 3
+#define ICON_POINTER_OPTION 12, 9
+#define ICON_POINTER_SPRING 13, 9
+#define ICON_POINTER_LINEAR 14, 9
+#define ICON_POINTER_WIGGLY 10, 3
+#define ICON_POINTER_METRONOME 6, 13
+
+class Pointer
+{
+public:
+    typedef enum {
+        POINTER_DEFAULT = 0,
+        POINTER_LINEAR,
+        POINTER_SPRING,
+        POINTER_WIGGLY,
+        POINTER_METRONOME,
+        POINTER_INVALID
+    } Mode;
+    static std::vector< std::tuple<int, int, std::string> > Modes;
+
+    Pointer() : strength_(0.5) {}
+    virtual ~Pointer() {}
+    inline glm::vec2 pos() { return pos_; }
+
+    virtual void initiate(glm::vec2 pos) { pos_ = pos; }
+    virtual void update(glm::vec2 pos, float) { pos_ = pos; }
+    virtual void draw() {}
+
+    inline void setStrength(float percent) { strength_ = glm::clamp(percent, 0.f, 1.f); }
+    inline float strength() const { return strength_; }
+
+protected:
+    glm::vec2 pos_;
+    float strength_;
+};
+
+class PointerLinear : public Pointer
+{
+public:
+    PointerLinear() {}
+    void update(glm::vec2 pos, float dt) override;
+    void draw() override;
+};
+
+class PointerSpring : public Pointer
+{
+    glm::vec2 velocity_;
+public:
+    PointerSpring() {}
+    void initiate(glm::vec2 pos) override;
+    void update(glm::vec2 pos, float dt) override;
+    void draw() override;
+};
+
+class PointerWiggly : public Pointer
+{
+public:
+    PointerWiggly() {}
+    void update(glm::vec2 pos, float) override;
+    void draw() override;
+};
+
+class PointerMetronome : public Pointer
+{
+public:
+    PointerMetronome() {}
+    void update(glm::vec2 pos, float dt) override;
+    void draw() override;
+};
+
+
+class MousePointer
+{
+    // Private Constructor
+    MousePointer();
+    MousePointer(MousePointer const& copy) = delete;
+    MousePointer& operator=(MousePointer const& copy) = delete;
+
+public:
+
+    static MousePointer& manager ()
+    {
+        // The only instance
+        static MousePointer _instance;
+        return _instance;
+    }
+
+    inline Pointer *active() { return active_; }
+    inline Pointer::Mode activeMode() { return mode_; }
+
+    void setActiveMode(Pointer::Mode m);
+
+private:
+
+    Pointer::Mode mode_;
+    Pointer *active_;
+};
+
+#endif // POINTER_H

src/Settings.cpp

@@ -132,7 +132,6 @@ void Settings::Save(uint64_t runtime)
     applicationNode->SetAttribute("accent_color", application.accent_color);
     applicationNode->SetAttribute("smooth_transition", application.smooth_transition);
     applicationNode->SetAttribute("save_snapshot", application.save_version_snapshot);
-    applicationNode->SetAttribute("smooth_cursor", application.smooth_cursor);
     applicationNode->SetAttribute("action_history_follow_view", application.action_history_follow_view);
     applicationNode->SetAttribute("show_tooptips", application.show_tooptips);
     applicationNode->SetAttribute("accept_connections", application.accept_connections);
@@ -214,6 +213,15 @@ void Settings::Save(uint64_t runtime)
     BrushNode->InsertEndChild( XMLElementFromGLM(&xmlDoc, application.brush) );
     pRoot->InsertEndChild(BrushNode);
 
+    // Pointer
+    XMLElement *PointerNode = xmlDoc.NewElement( "MousePointer" );
+    PointerNode->SetAttribute("mode", application.mouse_pointer);
+    for (size_t i = 0; i < application.mouse_pointer_strength.size(); ++i ) {
+        float v = application.mouse_pointer_strength[i];
+        PointerNode->InsertEndChild( XMLElementFromGLM(&xmlDoc, glm::vec2((float)i, v)) );
+    }
+    pRoot->InsertEndChild(PointerNode);
+
     // bloc views
     {
         XMLElement *viewsNode = xmlDoc.NewElement( "Views" );
@@ -284,8 +292,6 @@ void Settings::Save(uint64_t runtime)
 
         // recent SRT hosts
         knownhosts->InsertEndChild( save_knownhost(application.recentSRT, "SRT", xmlDoc));
-
-
         pRoot->InsertEndChild(knownhosts);
     }
 
@@ -410,7 +416,6 @@ void Settings::Load()
         applicationNode->QueryIntAttribute("accent_color", &application.accent_color);
         applicationNode->QueryBoolAttribute("smooth_transition", &application.smooth_transition);
         applicationNode->QueryBoolAttribute("save_snapshot", &application.save_version_snapshot);
-        applicationNode->QueryBoolAttribute("smooth_cursor", &application.smooth_cursor);
         applicationNode->QueryBoolAttribute("action_history_follow_view", &application.action_history_follow_view);
         applicationNode->QueryBoolAttribute("show_tooptips", &application.show_tooptips);
         applicationNode->QueryBoolAttribute("accept_connections", &application.accept_connections);
@@ -556,6 +561,20 @@ void Settings::Load()
         tinyxml2::XMLElementToGLM( brushnode->FirstChildElement("vec3"), application.brush);
     }
 
+    // Pointer
+    XMLElement * pointernode = pRoot->FirstChildElement("MousePointer");
+    if (pointernode != nullptr) {
+        pointernode->QueryIntAttribute("mode", &application.mouse_pointer);
+
+        XMLElement* strengthNode = pointernode->FirstChildElement("vec2");
+        for( ; strengthNode ; strengthNode = strengthNode->NextSiblingElement())
+        {
+            glm::vec2 val;
+            tinyxml2::XMLElementToGLM( strengthNode, val);
+            application.mouse_pointer_strength[ (size_t) ceil(val.x) ] = val.y;
+        }
+    }
+
     // bloc views
     {
         XMLElement * pElement = pRoot->FirstChildElement("Views");

src/Settings.h

@@ -271,7 +271,8 @@ struct Application
     int  accent_color;
     bool save_version_snapshot;
     bool smooth_transition;
-    bool smooth_cursor;
+    int  mouse_pointer;
+    std::vector<float> mouse_pointer_strength;
     bool action_history_follow_view;
     bool show_tooptips;
 
@@ -336,7 +337,8 @@ struct Application
         accent_color = 0;
         smooth_transition = false;
         save_version_snapshot = false;
-        smooth_cursor = false;
+        mouse_pointer = 0;
+        mouse_pointer_strength = {0.5f, 0.5f, 0.5f, 0.5f, 0.5f, 0.5f};
         action_history_follow_view = false;
         show_tooptips = true;
         accept_connections = false;

src/UserInterfaceManager.cpp

@@ -76,6 +76,7 @@
 #include "ShmdataBroadcast.h"
 #include "VideoBroadcast.h"
 #include "MultiFileRecorder.h"
+#include "MousePointer.h"
 
 #include "UserInterfaceManager.h"
 
@@ -442,13 +443,10 @@ void UserInterface::handleKeyboard()
 
 void UserInterface::handleMouse()
 {
-
     ImGuiIO& io = ImGui::GetIO();
     glm::vec2 mousepos(io.MousePos.x * io.DisplayFramebufferScale.x, io.MousePos.y * io.DisplayFramebufferScale.y);
     mousepos = glm::clamp(mousepos, glm::vec2(0.f), glm::vec2(io.DisplaySize.x * io.DisplayFramebufferScale.x, io.DisplaySize.y * io.DisplayFramebufferScale.y));
 
-    static glm::vec2 mouse_smooth = mousepos;
-
     static glm::vec2 mouseclic[2];
     mouseclic[ImGuiMouseButton_Left] = glm::vec2(io.MouseClickedPos[ImGuiMouseButton_Left].x * io.DisplayFramebufferScale.y, io.MouseClickedPos[ImGuiMouseButton_Left].y* io.DisplayFramebufferScale.x);
     mouseclic[ImGuiMouseButton_Right] = glm::vec2(io.MouseClickedPos[ImGuiMouseButton_Right].x * io.DisplayFramebufferScale.y, io.MouseClickedPos[ImGuiMouseButton_Right].y* io.DisplayFramebufferScale.x);
@@ -474,15 +472,6 @@ void UserInterface::handleMouse()
     // if not on any window
     if ( !ImGui::IsWindowHovered(ImGuiHoveredFlags_AnyWindow) && !ImGui::IsWindowFocused(ImGuiHoveredFlags_AnyWindow) )
     {
-        //
-        // Mouse wheel over background
-        //
-        if ( io.MouseWheel != 0) {
-            // scroll => zoom current view
-            Mixer::manager().view()->zoom( io.MouseWheel );
-        }
-        // TODO : zoom with center on source if over current
-
         //
         // RIGHT Mouse button
         //
@@ -512,7 +501,11 @@ void UserInterface::handleMouse()
             if ( !mousedown )
             {
                 mousedown = true;
-                mouse_smooth = mousepos;
+
+                // initiate Mouse pointer from position at mouse down event
+                MousePointer::manager().setActiveMode( (Pointer::Mode) Settings::application.mouse_pointer );
+                MousePointer::manager().active()->setStrength( Settings::application.mouse_pointer_strength[Settings::application.mouse_pointer] );
+                MousePointer::manager().active()->initiate(mousepos);
 
                 // ask the view what was picked
                 picked = Mixer::manager().view()->pick(mousepos);
@@ -592,17 +585,8 @@ void UserInterface::handleMouse()
             if (view_drag == Mixer::manager().view()) {
 
                 if ( picked.first != nullptr ) {
-                    // Smooth cursor
+                    // Apply Mouse pointer filter
-                    if (Settings::application.smooth_cursor) {
+                    MousePointer::manager().active()->update(mousepos, 1.f / ( MAX(io.Framerate, 1.f) ));
-                        // TODO : physics implementation
-                        float smoothing = 10.f / ( MAX(io.Framerate, 1.f) );
-                        glm::vec2 d = mousepos - mouse_smooth;
-                        mouse_smooth += smoothing * d;
-                        ImVec2 start = ImVec2(mouse_smooth.x / io.DisplayFramebufferScale.x, mouse_smooth.y / io.DisplayFramebufferScale.y);
-                        ImGui::GetBackgroundDrawList()->AddLine(io.MousePos, start, ImGui::GetColorU32(ImGuiCol_HeaderActive), 5.f);
-                    }
-                    else
-                        mouse_smooth = mousepos;
 
                     // action on current source
                     Source *current = Mixer::manager().currentSource();
@@ -612,19 +596,32 @@ void UserInterface::handleMouse()
                             // grab others from selection
                             for (auto it = Mixer::selection().begin(); it != Mixer::selection().end(); ++it) {
                                 if ( *it != current && !(*it)->locked() )
-                                    Mixer::manager().view()->grab(*it, mouseclic[ImGuiMouseButton_Left], mouse_smooth, picked);
+                                    Mixer::manager().view()->grab(*it, mouseclic[ImGuiMouseButton_Left],
+                                                                  MousePointer::manager().active()->pos(), picked);
                             }
                         }
                         // grab current sources
-                        View::Cursor c = Mixer::manager().view()->grab(current, mouseclic[ImGuiMouseButton_Left], mouse_smooth, picked);
+                        View::Cursor c = Mixer::manager().view()->grab(current, mouseclic[ImGuiMouseButton_Left],
+                                                                       MousePointer::manager().active()->pos(), picked);
                         SetMouseCursor(io.MousePos, c);
+
+                        // scrollwheel changes strength of Mouse Pointer
+                        if ( io.MouseWheel != 0) {
+                            MousePointer::manager().active()->setStrength( MousePointer::manager().active()->strength() + 0.1 * io.MouseWheel);
+                            Settings::application.mouse_pointer_strength[Settings::application.mouse_pointer] = MousePointer::manager().active()->strength();
+                        }
+
+                        // Draw Mouse pointer effect
+                        MousePointer::manager().active()->draw();
                     }
                     // action on other (non-source) elements in the view
                     else
                     {
-                        View::Cursor c = Mixer::manager().view()->grab(nullptr, mouseclic[ImGuiMouseButton_Left], mouse_smooth, picked);
+                        View::Cursor c = Mixer::manager().view()->grab(nullptr, mouseclic[ImGuiMouseButton_Left], mousepos, picked);
                         SetMouseCursor(io.MousePos, c);
                     }
+
+
                 }
                 // Selection area
                 else {
@@ -640,6 +637,13 @@ void UserInterface::handleMouse()
 
             }
         }
+        //
+        // Mouse wheel over background without source action
+        //
+        else if ( !mousedown && io.MouseWheel != 0) {
+            // scroll => zoom current view
+            Mixer::manager().view()->zoom( io.MouseWheel );
+        }
     }
     else {
         // cancel all operations on view when interacting on GUI
@@ -2770,7 +2774,7 @@ void Navigator::Render()
     height_ = ImGui::GetIO().DisplaySize.y;                          // cover vertically
     const float icon_width = width_ - 2.f * style.WindowPadding.x;         // icons keep padding
     const ImVec2 iconsize(icon_width, icon_width);
-    const float sourcelist_height = height_ - 5.5f * icon_width - 5.f * style.WindowPadding.y; // space for 4 icons of view
+    const float sourcelist_height = height_ - 6.5f * icon_width - 6.f * style.WindowPadding.y; // space for 4 icons of view
 
     // hack to show more sources if not enough space; make source icons smaller...
     ImVec2 sourceiconsize(icon_width, icon_width);
@@ -2886,6 +2890,10 @@ void Navigator::Render()
     if (ImGui::Begin("##navigatorViews", NULL, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoDecoration |
                      ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoScrollWithMouse))
     {
+        // Mouse pointer selector
+        RenderMousePointerSelector(iconsize);
+
+        // List of icons for View selection
         bool selected_view[View::INVALID] = { };
         selected_view[ Settings::application.current_view ] = true;
         int previous_view = Settings::application.current_view;
@@ -4606,6 +4614,80 @@ void Navigator::RenderMainPannelVimix()
         ImGui::EndPopup();
     }
 
+
+}
+
+
+void Navigator::RenderMousePointerSelector(const ImVec2 &size)
+{
+    ImGuiContext& g = *GImGui;
+    ImVec2 top = ImGui::GetCursorPos();
+
+    ///
+    /// interactive button of the given size: show menu if clic or mouse over
+    ///
+    static uint counter_menu_timeout = 0;
+    if ( ImGui::InvisibleButton("##MenuMousePointerButton", size) || ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByPopup) ) {
+
+        counter_menu_timeout=0;
+        ImGui::OpenPopup( "MenuMousePointer" );
+    }
+    ImVec2 bottom = ImGui::GetCursorScreenPos();
+
+    // Change color of icons depending on context menu status
+    const ImVec4* colors = ImGui::GetStyle().Colors;
+    ImGui::PushStyleColor( ImGuiCol_Text, ImGui::IsPopupOpen("MenuMousePointer") ? colors[ImGuiCol_DragDropTarget] : colors[ImGuiCol_Text] );
+
+    // Draw centered icon of Mouse pointer
+    ImVec2 margin = (size - ImVec2(g.FontSize, g.FontSize)) * 0.42f;
+    ImGui::SetCursorPos( top + margin );
+
+    if ( Settings::application.mouse_pointer > 0 ) {
+        // icon with corner erased
+        ImGuiToolkit::Icon(ICON_POINTER_OPTION);
+
+        // Draw sub-icon of Mouse pointer type
+        ImGuiToolkit::PushFont(ImGuiToolkit::FONT_DEFAULT);
+        ImVec2 t = top + size - ImVec2(g.FontSize, g.FontSize) - ImVec2(g.Style.FramePadding.y, g.Style.FramePadding.y);
+        ImGui::SetCursorPos( t );
+        std::tuple<int, int, std::string> mode = Pointer::Modes.at( (size_t) Settings::application.mouse_pointer);
+        ImGuiToolkit::Icon(std::get<0>(mode), std::get<1>(mode));
+        ImGui::PopFont();
+    }
+    else
+        // standard icon
+        ImGuiToolkit::Icon(ICON_POINTER_DEFAULT);
+
+    // Revert
+    ImGui::PopStyleColor(1);
+    ImGui::SetCursorScreenPos(bottom);
+
+    ///
+    /// Render the Popup menu selector
+    ///
+    ImGui::SetNextWindowPos( bottom + ImVec2(size.x + g.Style.WindowPadding.x, -size.y), ImGuiCond_Always );
+    if (ImGui::BeginPopup( "MenuMousePointer" ))
+    {
+        // loop over all mouse pointer modes
+        for ( size_t m = Pointer::POINTER_DEFAULT; m < Pointer::POINTER_INVALID; ++m) {
+            bool on = m == (size_t) Settings::application.mouse_pointer;
+            std::tuple<int, int, std::string> mode = Pointer::Modes.at(m);
+            // show icon of mouse mode and set mouse pointer if selected
+            if (ImGuiToolkit::IconToggle( std::get<0>(mode), std::get<1>(mode), &on, std::get<2>(mode).c_str()) )
+                Settings::application.mouse_pointer = (int) m;
+            // space between icons
+            ImGui::SameLine(0, IMGUI_SAME_LINE);
+        }
+
+        // timer to close menu like a tooltip
+        if (ImGui::IsWindowHovered())
+            counter_menu_timeout=0;
+        else if (++counter_menu_timeout > 10)
+            ImGui::CloseCurrentPopup();
+
+        ImGui::EndPopup();
+    }
+
 }
 
 void Navigator::RenderMainPannelSettings()
@@ -4637,9 +4719,6 @@ void Navigator::RenderMainPannelSettings()
             Settings::application.scale = CLAMP(Settings::application.scale, 0.5f, 2.f);
             ImGui::GetIO().FontGlobalScale = Settings::application.scale;
         }
-        ImGuiToolkit::HelpToolTip("Cursor filter that makes movement smoother when manipulating a source.");
-        ImGui::SameLine();
-        ImGuiToolkit::ButtonSwitch( ICON_FA_MOUSE_POINTER "  Smooth cursor", &Settings::application.smooth_cursor);
 
         //
         // Recording preferences

src/UserInterfaceManager.h

@@ -70,6 +70,7 @@ class Navigator
     void RenderTransitionPannel();
     void RenderNewPannel();
     void RenderViewPannel(ImVec2 draw_pos, ImVec2 draw_size);
+    void RenderMousePointerSelector(const ImVec2 &size);
 
 public: