Improved View Cursor; now also displays context information around the

cursor during operation (e.g. grab)

ImGuiToolkit.cpp

@@ -808,8 +808,8 @@ void ImGuiToolkit::ShowStats(bool *p_open, int* p_corner)
             if (p_open && ImGui::MenuItem("Close")) *p_open = false;
             ImGui::EndPopup();
         }
+        ImGui::End();
     }
-    ImGui::End();
 }
 
 ImVec4 ImGuiToolkit::GetHighlightColor()

ImGuiVisitor.cpp

@@ -77,10 +77,10 @@ void ImGuiVisitor::visit(Group &n)
     ImGui::SameLine(0, 10);
     float scale[2] = { n.scale_.x, n.scale_.y} ;
     ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
-    if ( ImGui::SliderFloat2("Scale", scale, -5.0, 5.0, "%.2f") )
+    if ( ImGui::SliderFloat2("Scale", scale, -MAX_SCALE, MAX_SCALE, "%.2f") )
     {
-        n.scale_.x = scale[0];
+        n.scale_.x = CLAMP_SCALE(scale[0]);
-        n.scale_.y = scale[1];
+        n.scale_.y = CLAMP_SCALE(scale[1]);
     }
 
 //        // loop over members of a group

Source.cpp

@@ -205,8 +205,14 @@ void Source::update(float dt)
 
         // MODIFY geometry based on GEOMETRY node
         groups_[View::RENDERING]->translation_ = groups_[View::GEOMETRY]->translation_;
-        groups_[View::RENDERING]->scale_ = groups_[View::GEOMETRY]->scale_;
         groups_[View::RENDERING]->rotation_ = groups_[View::GEOMETRY]->rotation_;
+        // avoid any null scale
+        glm::vec3 s = groups_[View::GEOMETRY]->scale_;
+        s.x = CLAMP_SCALE(s.x);
+        s.y = CLAMP_SCALE(s.y);
+        s.z = 1.f;
+        groups_[View::GEOMETRY]->scale_ = s;
+        groups_[View::RENDERING]->scale_ = s;
 
         // MODIFY depth based on LAYER node
         groups_[View::MIXING]->translation_.z = groups_[View::LAYER]->translation_.z;

UserInterfaceManager.cpp

@@ -330,9 +330,9 @@ void UserInterface::handleMouse()
         if ( ImGui::IsMouseDragging(ImGuiMouseButton_Right, 10.0f) )
         {
             // right mouse drag => drag current view
-            int c = Mixer::manager().currentView()->drag( mouseclic[ImGuiMouseButton_Right], mousepos);
+            View::Cursor c = Mixer::manager().currentView()->drag( mouseclic[ImGuiMouseButton_Right], mousepos);
 
-            ImGui::SetMouseCursor(c);
+            ImGui::SetMouseCursor(c.type);
         }
         else {
             ImGui::SetMouseCursor(ImGuiMouseCursor_Arrow);
@@ -355,8 +355,21 @@ void UserInterface::handleMouse()
             if (current)
             {
                 // grab current source
-                int c = Mixer::manager().currentView()->grab( mouseclic[ImGuiMouseButton_Left], mousepos, current, picked);
+                View::Cursor c = Mixer::manager().currentView()->grab( mouseclic[ImGuiMouseButton_Left], mousepos, current, picked);
-                ImGui::SetMouseCursor(c);
+
+                ImGui::SetMouseCursor(c.type);
+
+                float d = 0.5f * ImGui::GetFrameHeight() ;
+                ImVec2 window_pos = ImVec2( mousepos.x - d, mousepos.y - d );
+                ImGui::SetNextWindowPos(window_pos, ImGuiCond_Always);
+                ImGui::SetNextWindowBgAlpha(0.45f); // Transparent background
+                if (ImGui::Begin("MouseInfoContext", NULL, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoNav))
+                {
+                    ImGuiToolkit::PushFont(ImGuiToolkit::FONT_MONO);
+                    ImGui::Text("   %s", c.info.c_str());
+                    ImGui::PopFont();
+                    ImGui::End();
+                }
             }
             else {
 //                Log::Info("Mouse drag (%.1f,%.1f)(%.1f,%.1f)", io.MouseClickedPos[0].x, io.MouseClickedPos[0].y, io.MousePos.x, io.MousePos.y);

View.cpp

@@ -6,6 +6,8 @@
 
 // memmove
 #include <string.h>
+#include <sstream>
+#include <iomanip>
 
 #include "defines.h"
 #include "Settings.h"
@@ -76,7 +78,7 @@ View::Cursor View::drag (glm::vec2 from, glm::vec2 to)
     // compute delta translation
     scene.root()->translation_ = start_translation + gl_Position_to - gl_Position_from;
 
-    return Cursor_ResizeAll;
+    return Cursor(Cursor_ResizeAll);
 }
 
 std::pair<Node *, glm::vec2> View::pick(glm::vec3 point)
@@ -133,7 +135,7 @@ void MixingView::zoom( float factor )
 View::Cursor MixingView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node *, glm::vec2>)
 {
     if (!s)
-        return Cursor_Arrow;
+        return Cursor();
 
     Group *sourceNode = s->group(mode_);
 
@@ -155,7 +157,9 @@ View::Cursor MixingView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pai
     // request update
     s->touch();
 
-    return Cursor_ResizeAll;
+    std::ostringstream info;
+    info << "Alpha " << std::fixed << std::setprecision(3) << s->blendingShader()->color.a;
+    return Cursor(Cursor_ResizeAll, info.str() );
 }
 
 uint MixingView::textureMixingQuadratic()
@@ -344,7 +348,9 @@ std::pair<Node *, glm::vec2> GeometryView::pick(glm::vec3 point)
 
 View::Cursor GeometryView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node *, glm::vec2> pick)
 {
-    View::Cursor ret = Cursor_Arrow;
+    View::Cursor ret = Cursor();
+
+    std::ostringstream info;
 
     // work on the given source
     if (!s)
@@ -396,42 +402,70 @@ View::Cursor GeometryView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::p
 
             // select cursor depending on diagonal
             glm::vec2 axis = glm::sign(pick.second);
-            ret = axis.x * axis.y > 0.f ? Cursor_ResizeNESW : Cursor_ResizeNWSE;
+            ret.type = axis.x * axis.y > 0.f ? Cursor_ResizeNESW : Cursor_ResizeNWSE;
+            info << "Size " << std::fixed << std::setprecision(3) << sourceNode->scale_.x;
+            info << " x "  << sourceNode->scale_.y;
         }
         // picking on the resizing handles left or right
         else if ( pick.first == s->resize_H_handle_ ) {
             sourceNode->scale_ = start_scale * glm::vec3(S_resize.x, 1.f, 1.f);
-            ret = Cursor_ResizeEW;
+            if (UserInterface::manager().keyboardModifier())
+                sourceNode->scale_.x = float( int( sourceNode->scale_.x * 10.f ) ) / 10.f;
+
+            ret.type = Cursor_ResizeEW;
+            info << "Size " << std::fixed << std::setprecision(3) << sourceNode->scale_.x;
+            info << " x "  << sourceNode->scale_.y;
         }
         // picking on the resizing handles top or bottom
         else if ( pick.first == s->resize_V_handle_ ) {
             sourceNode->scale_ = start_scale * glm::vec3(1.f, S_resize.y, 1.f);
-            ret = Cursor_ResizeNS;
+            if (UserInterface::manager().keyboardModifier())
+                sourceNode->scale_.y = float( int( sourceNode->scale_.y * 10.f ) ) / 10.f;
+
+            ret.type = Cursor_ResizeNS;
+            info << "Size " << std::fixed << std::setprecision(3) << sourceNode->scale_.x;
+            info << " x "  << sourceNode->scale_.y;
         }
         // picking on the rotating handle
         else if ( pick.first == s->rotate_handle_ ) {
             float angle = glm::orientedAngle( glm::normalize(glm::vec2(S_from)), glm::normalize(glm::vec2(S_to)));
-
-            if (UserInterface::manager().keyboardModifier())
-                angle = float ( int(angle * 30.f) ) / 30.f;
             sourceNode->rotation_ = start_rotation + glm::vec3(0.f, 0.f, angle);
-            ret = Cursor_Hand;
+
+            int degrees = int(  glm::degrees(sourceNode->rotation_.z) );
+            if (UserInterface::manager().keyboardModifier()) {
+                degrees = (degrees / 10) * 10;
+                sourceNode->rotation_.z = glm::radians( float(degrees) );
+            }
+
+            ret.type = Cursor_Hand;
+            info << "Angle " << degrees << "\u00b0"; // degree symbol
         }
         // picking anywhere but on a handle: user wants to move the source
         else {
             sourceNode->translation_ = start_translation + gl_Position_to - gl_Position_from;
-            ret = Cursor_ResizeAll;
+
+            if (UserInterface::manager().keyboardModifier()) {
+                sourceNode->translation_.x = float( int( sourceNode->translation_.x * 10.f ) ) / 10.f;
+                sourceNode->translation_.y = float( int( sourceNode->translation_.y * 10.f ) ) / 10.f;
+            }
+
+            ret.type = Cursor_ResizeAll;
+            info << "Position (" << std::fixed << std::setprecision(3) << sourceNode->translation_.x;
+            info << ", "  << sourceNode->translation_.y << ")";
         }
     }
     // don't have a handle, we can only move the source
     else {
         sourceNode->translation_ = start_translation + gl_Position_to - gl_Position_from;
-        ret = Cursor_ResizeAll;
+        ret.type = Cursor_ResizeAll;
+        info << "Position (" << std::fixed << std::setprecision(3) << sourceNode->translation_.x;
+        info << ", "  << sourceNode->translation_.y << ")";
     }
 
     // request update
     s->touch();
 
+    ret.info = info.str();
     return ret;
 }
 
@@ -497,10 +531,10 @@ void LayerView::zoom (float factor)
 }
 
 
-void LayerView::setDepth (Source *s, float d)
+float LayerView::setDepth(Source *s, float d)
 {
     if (!s)
-        return;
+        return -1.f;
 
     float depth = d;
 
@@ -528,12 +562,14 @@ void LayerView::setDepth (Source *s, float d)
 
     // request reordering
     View::need_deep_update_ = true;
+
+    return sourceNode->translation_.z;
 }
 
 View::Cursor LayerView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node *, glm::vec2> pick)
 {
     if (!s)
-        return Cursor_Arrow;
+        return Cursor();
 
     static glm::vec3 start_translation = glm::vec3(0.f);
     static glm::vec2 start_position = glm::vec2(0.f);
@@ -551,8 +587,10 @@ View::Cursor LayerView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair
     glm::vec3 dest_translation = start_translation + gl_Position_to - gl_Position_from;
 
     // apply change
-    setDepth( s,  MAX( -dest_translation.x, 0.f) );
+    float d = setDepth( s,  MAX( -dest_translation.x, 0.f) );
 
-    return Cursor_ResizeAll;
+    std::ostringstream info;
+    info << "Depth " << std::fixed << std::setprecision(2) << d;
+    return Cursor(Cursor_ResizeAll, info.str() );
 }
 

View.h

@@ -32,15 +32,22 @@ public:
         Cursor_ResizeNWSE,
         Cursor_Hand,
         Cursor_NotAllowed
+    } CursorType;
+
+    typedef struct Cursor {
+        CursorType type;
+        std::string info;
+        Cursor() { type = Cursor_Arrow; info = "";}
+        Cursor(CursorType t, std::string i = "") { type = t; info = i;}
     } Cursor;
 
     virtual std::pair<Node *, glm::vec2> pick(glm::vec3 point);
     virtual Cursor drag (glm::vec2, glm::vec2);
     virtual Cursor grab (glm::vec2, glm::vec2, Source*, std::pair<Node *, glm::vec2>) {
-        return Cursor_Arrow;
+        return Cursor();
     }
     virtual Cursor over (glm::vec2, Source*, std::pair<Node *, glm::vec2>) {
-        return Cursor_Arrow;
+        return Cursor();
     }
 
     virtual void restoreSettings();
@@ -107,7 +114,7 @@ public:
     void zoom (float factor) override;
     Cursor grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node *, glm::vec2> pick) override;
 
-    void setDepth (Source *, float d = -1.f);
+    float setDepth (Source *, float d = -1.f);
 
 private:
     float aspect_ratio;

defines.h

@@ -25,6 +25,9 @@
 #define SCENE_UNIT 5.f
 #define SCENE_DEPTH 12.f
 #define CIRCLE_SQUARE_DIST(x,y) ( (x*x + y*y) / (SCENE_UNIT * SCENE_UNIT * SCENE_UNIT * SCENE_UNIT) )
+#define MIN_SCALE 0.01f
+#define MAX_SCALE 10.f
+#define CLAMP_SCALE(x) SIGN(x) * CLAMP( ABS(x), MIN_SCALE, MAX_SCALE)
 
 #define IMGUI_TITLE_MAINWINDOW ICON_FA_CIRCLE_NOTCH "  vimix"
 #define IMGUI_TITLE_MEDIAPLAYER ICON_FA_FILM "  Media Player"
@@ -58,8 +61,6 @@
 #define MAX_ICON_SIZE 2.5
 #define MIN_DEPTH_LAYER 0.0
 #define MAX_DEPTH_LAYER 40.0
-#define MIN_SCALE 0.1
-#define MAX_SCALE 200.0
 #define DEPTH_EPSILON 0.1
 #define DEPTH_DEFAULT_SPACING 1.0
 #define BORDER_SIZE 0.4