ColorPicker: Added ImGuiColorEditFlags_NoSidePreview flag + optional reference color. Added more demo code. (#346)

imgui.cpp

@@ -9266,48 +9266,28 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
                 Separator();
             }
             float square_sz = ColorSquareSize();
-            ImGuiColorEditFlags picker_flags_to_forward = ImGuiColorEditFlags_Float | ImGuiColorEditFlags_NoAlpha | ImGuiColorEditFlags_AlphaBar | ImGuiColorEditFlags_AlphaPreview | ImGuiColorEditFlags_AlphaPreviewHalf;
-            ImGuiColorEditFlags picker_flags = (flags & picker_flags_to_forward) | (ImGuiColorEditFlags_RGB | ImGuiColorEditFlags_HSV | ImGuiColorEditFlags_HEX) | ImGuiColorEditFlags_NoLabel;
-            if ((flags & ImGuiColorEditFlags_NoRefColor) == 0)
-                picker_flags |= ImGuiColorEditFlags_NoColorSquare;
+            ImGuiColorEditFlags picker_flags_to_forward = ImGuiColorEditFlags_Float | ImGuiColorEditFlags_NoAlpha | ImGuiColorEditFlags_AlphaBar;// | ImGuiColorEditFlags_AlphaPreview | ImGuiColorEditFlags_AlphaPreviewHalf;
+            ImGuiColorEditFlags picker_flags = (flags & picker_flags_to_forward) | (ImGuiColorEditFlags_RGB | ImGuiColorEditFlags_HSV | ImGuiColorEditFlags_HEX) | ImGuiColorEditFlags_NoLabel | ImGuiColorEditFlags_AlphaPreviewHalf;
             PushItemWidth(square_sz * 12.0f); // Use 256 + bar sizes?
-            value_changed |= ColorPicker4("##picker", col, picker_flags);
+            value_changed |= ColorPicker4("##picker", col, picker_flags, &g.ColorPickerRef.x);
             PopItemWidth();
-            if ((flags & ImGuiColorEditFlags_NoRefColor) == 0)
-            {
-                SameLine();
-                BeginGroup();
-                Text("Current");
-                ColorButton("##current", col_v4, ImGuiColorEditFlags_NoTooltip|ImGuiColorEditFlags_AlphaPreviewHalf, ImVec2(square_sz * 3, square_sz * 2));
-                Text("Original");
-                if (ColorButton("##original", g.ColorPickerRef, ImGuiColorEditFlags_NoTooltip|ImGuiColorEditFlags_AlphaPreviewHalf, ImVec2(square_sz * 3, square_sz * 2)))
-                {
-                    memcpy(col, &g.ColorPickerRef, components * sizeof(float));
-                    value_changed = true;
-                }
-                EndGroup();
-            }
-            EndPopup();
-        }
-
-        // Context menu: display and store options. Don't apply to 'flags' this frame.
-        if (!(flags & ImGuiColorEditFlags_NoOptions) && BeginPopup("context"))
-        {
-            ImGuiColorEditFlags new_flags = -1;
-            if (RadioButton("RGB", (flags & ImGuiColorEditFlags_RGB)?1:0)) new_flags = (flags & ~ImGuiColorEditFlags_ModeMask_) | ImGuiColorEditFlags_RGB;
-            if (RadioButton("HSV", (flags & ImGuiColorEditFlags_HSV)?1:0)) new_flags = (flags & ~ImGuiColorEditFlags_ModeMask_) | ImGuiColorEditFlags_HSV;
-            if (RadioButton("HEX", (flags & ImGuiColorEditFlags_HEX)?1:0)) new_flags = (flags & ~ImGuiColorEditFlags_ModeMask_) | ImGuiColorEditFlags_HEX;
-            Separator();
-            if (RadioButton("0..255", (flags & ImGuiColorEditFlags_Float)?0:1)) new_flags = (flags & ~ImGuiColorEditFlags_Float);
-            if (RadioButton("0.00..1.00", (flags & ImGuiColorEditFlags_Float)?1:0)) new_flags = (flags | ImGuiColorEditFlags_Float);
-            if (new_flags != -1)
-                g.ColorEditModeStorage.SetInt(storage_id, (int)(new_flags & ImGuiColorEditFlags_StoredMask_));
             EndPopup();
         }
+    }
 
-        // Recreate our own tooltip over's ColorButton() one because we want to display correct alpha here
-        if (!(flags & ImGuiColorEditFlags_NoTooltip) && IsItemHovered())
-            ColorTooltip(label, col, flags);
+    // Context menu: display and store options. Don't apply to 'flags' this frame.
+    if (!(flags & ImGuiColorEditFlags_NoOptions) && BeginPopup("context"))
+    {
+        ImGuiColorEditFlags new_flags = -1;
+        if (RadioButton("RGB", (flags & ImGuiColorEditFlags_RGB)?1:0)) new_flags = (flags & ~ImGuiColorEditFlags_ModeMask_) | ImGuiColorEditFlags_RGB;
+        if (RadioButton("HSV", (flags & ImGuiColorEditFlags_HSV)?1:0)) new_flags = (flags & ~ImGuiColorEditFlags_ModeMask_) | ImGuiColorEditFlags_HSV;
+        if (RadioButton("HEX", (flags & ImGuiColorEditFlags_HEX)?1:0)) new_flags = (flags & ~ImGuiColorEditFlags_ModeMask_) | ImGuiColorEditFlags_HEX;
+        Separator();
+        if (RadioButton("0..255", (flags & ImGuiColorEditFlags_Float)?0:1)) new_flags = (flags & ~ImGuiColorEditFlags_Float);
+        if (RadioButton("0.00..1.00", (flags & ImGuiColorEditFlags_Float)?1:0)) new_flags = (flags | ImGuiColorEditFlags_Float);
+        if (new_flags != -1)
+            g.ColorEditModeStorage.SetInt(storage_id, (int)(new_flags & ImGuiColorEditFlags_StoredMask_));
+        EndPopup();
     }
 
     if (label != label_display_end && !(flags & ImGuiColorEditFlags_NoLabel))
@@ -9352,7 +9332,7 @@ bool ImGui::ColorPicker3(const char* label, float col[3], ImGuiColorEditFlags fl
 // ColorPicker
 // Note: only access 3 floats if ImGuiColorEditFlags_NoAlpha flag is set.
 // FIXME: we adjust the big color square height based on item width, which may cause a flickering feedback loop (if automatic height makes a vertical scrollbar appears, affecting automatic width..) 
-bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags flags)
+bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags flags, const float* ref_col)
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = GetCurrentWindow();
@@ -9364,6 +9344,9 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
     PushID(label);
     BeginGroup();
 
+    if ((flags & ImGuiColorEditFlags_NoSidePreview) == 0)
+        flags |= ImGuiColorEditFlags_NoColorSquare;
+
     // Setup
     bool alpha_bar = (flags & ImGuiColorEditFlags_AlphaBar) && !(flags & ImGuiColorEditFlags_NoAlpha);
     ImVec2 picker_pos = window->DC.CursorPos;
@@ -9407,15 +9390,41 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
         }
     }
 
-    if ((flags & ImGuiColorEditFlags_NoLabel) == 0)
+    if (!(flags & ImGuiColorEditFlags_NoSidePreview))
+    {
+        SameLine(0, style.ItemInnerSpacing.x);
+        BeginGroup();
+    }
+
+    if (!(flags & ImGuiColorEditFlags_NoLabel))
     {
         const char* label_display_end = FindRenderedTextEnd(label);
         if (label != label_display_end)
         {
-            SameLine(0, style.ItemInnerSpacing.x);
+            if ((flags & ImGuiColorEditFlags_NoSidePreview))
+                SameLine(0, style.ItemInnerSpacing.x);
             TextUnformatted(label, label_display_end);
         }
     }
+    if (!(flags & ImGuiColorEditFlags_NoSidePreview))
+    {
+        ImVec4 col_v4(col[0], col[1], col[2], (flags & ImGuiColorEditFlags_NoAlpha) ? 1.0f : col[3]);
+        float square_sz = ColorSquareSize();
+        if ((flags & ImGuiColorEditFlags_NoLabel))
+            Text("Current");
+        ColorButton("##current", col_v4, (flags & (ImGuiColorEditFlags_AlphaPreview|ImGuiColorEditFlags_AlphaPreviewHalf)), ImVec2(square_sz * 3, square_sz * 2));
+        if (ref_col != NULL)
+        {
+            Text("Original");
+            ImVec4 ref_col_v4(ref_col[0], ref_col[1], ref_col[2], (flags & ImGuiColorEditFlags_NoAlpha) ? 1.0f : ref_col[3]);
+            if (ColorButton("##original", ref_col_v4, (flags & (ImGuiColorEditFlags_AlphaPreview|ImGuiColorEditFlags_AlphaPreviewHalf)), ImVec2(square_sz * 3, square_sz * 2)))
+            {
+                memcpy(col, ref_col, ((flags & ImGuiColorEditFlags_NoAlpha) ? 3 : 4) * sizeof(float));
+                value_changed = true;
+            }
+        }
+        EndGroup();
+    }
 
     // Convert back color to RGB
     if (hsv_changed)

imgui.h

@@ -280,7 +280,7 @@ namespace ImGui
     IMGUI_API bool          ColorEdit3(const char* label, float col[3], ImGuiColorEditFlags flags = 0);     // 3-4 components color edition. click on colored squared to open a color picker, right-click for options. Hint: 'float col[3]' function argument is same as 'float* col'. You can pass address of first element out of a contiguous structure, e.g. &myvector.x
     IMGUI_API bool          ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flags = 0);
     IMGUI_API bool          ColorPicker3(const char* label, float col[3], ImGuiColorEditFlags flags = 0);
-    IMGUI_API bool          ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags flags = 0);
+    IMGUI_API bool          ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags flags = 0, const float* ref_col = NULL);
     IMGUI_API void          PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), int stride = sizeof(float));
     IMGUI_API void          PlotLines(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
     IMGUI_API void          PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), int stride = sizeof(float));
@@ -678,7 +678,7 @@ enum ImGuiColorEditFlags_
     ImGuiColorEditFlags_NoInputs        = 1 << 12,  // ColorEdit, ColorPicker: disable inputs sliders/text widgets, show only the colored square.
     ImGuiColorEditFlags_NoTooltip       = 1 << 13,  // ColorEdit, ColorButton: disable tooltip when hovering the colored square.
     ImGuiColorEditFlags_NoLabel         = 1 << 14,  // ColorEdit, ColorPicker: disable display of inline text label (the label is still used in tooltip and picker).
-    ImGuiColorEditFlags_NoRefColor      = 1 << 15,
+    ImGuiColorEditFlags_NoSidePreview   = 1 << 15,  // ColorPicker: disable bigger color preview on right side of the picker, use small colored square instead
     ImGuiColorEditFlags_ModeMask_       = ImGuiColorEditFlags_RGB|ImGuiColorEditFlags_HSV|ImGuiColorEditFlags_HEX,
     ImGuiColorEditFlags_StoredMask_     = ImGuiColorEditFlags_RGB|ImGuiColorEditFlags_HSV|ImGuiColorEditFlags_HEX|ImGuiColorEditFlags_Float
 };

imgui_demo.cpp

@@ -666,44 +666,58 @@ void ImGui::ShowTestWindow(bool* p_open)
             static bool alpha_half_preview = false;
             ImGui::Checkbox("With Alpha Preview", &alpha_preview);
             ImGui::Checkbox("With Half Alpha Preview", &alpha_half_preview);
-            int alpha_previw_flags = alpha_half_preview ? ImGuiColorEditFlags_AlphaPreviewHalf : (alpha_preview ? ImGuiColorEditFlags_AlphaPreview : 0);
+            int alpha_preview_flags = alpha_half_preview ? ImGuiColorEditFlags_AlphaPreviewHalf : (alpha_preview ? ImGuiColorEditFlags_AlphaPreview : 0);
 
             ImGui::Text("Color widget:");
             ImGui::SameLine(); ShowHelpMarker("Click on the colored square to open a color picker.\nRight-click on the colored square to show options.\nCTRL+click on individual component to input value.\n");
             ImGui::ColorEdit3("MyColor##1", (float*)&color, ImGuiColorEditFlags_HSV);
 
             ImGui::Text("Color widget with Alpha:");
-            ImGui::ColorEdit4("MyColor##2", (float*)&color, alpha_previw_flags);
+            ImGui::ColorEdit4("MyColor##2", (float*)&color, alpha_preview_flags);
 
             ImGui::Text("Color widget with Float Display:");
-            ImGui::ColorEdit4("MyColor##2f", (float*)&color, ImGuiColorEditFlags_Float | alpha_previw_flags);
+            ImGui::ColorEdit4("MyColor##2f", (float*)&color, ImGuiColorEditFlags_Float | alpha_preview_flags);
 
             ImGui::Text("Color button with Picker:");
             ImGui::SameLine(); ShowHelpMarker("With the ImGuiColorEditFlags_NoInputs flag you can hide all the slider/text inputs.\nWith the ImGuiColorEditFlags_NoLabel flag you can pass a non-empty label which will only be used for the tooltip and picker popup.");
-            ImGui::ColorEdit4("MyColor##3", (float*)&color, ImGuiColorEditFlags_NoInputs | ImGuiColorEditFlags_NoLabel | alpha_previw_flags);
+            ImGui::ColorEdit4("MyColor##3", (float*)&color, ImGuiColorEditFlags_NoInputs | ImGuiColorEditFlags_NoLabel | alpha_preview_flags);
 
             ImGui::Text("Color button only:");
-            ImGui::ColorButton("MyColor##3b", *(ImVec4*)&color, alpha_previw_flags, ImVec2(80,80));
+            ImGui::ColorButton("MyColor##3b", *(ImVec4*)&color, alpha_preview_flags, ImVec2(80,80));
 
             ImGui::Text("Color picker:");
             static bool alpha = true;
             static bool alpha_bar = false;
+            static bool side_preview = true;
+            static bool ref_color = false;
+            static ImVec4 ref_color_v(1.0f,0.0f,1.0f,0.5f);
             static int inputs_mode = 2;
             static float width = 200.0f;
             ImGui::Checkbox("With Alpha", &alpha);
             ImGui::Checkbox("With Alpha Bar", &alpha_bar);
+            ImGui::Checkbox("With Side Preview", &side_preview);
+            if (side_preview)
+            {
+                ImGui::Checkbox("With Ref Color", &ref_color);
+                if (ref_color)
+                {
+                    ImGui::SameLine();
+                    ImGui::ColorEdit4("##RefColor", &ref_color_v.x, ImGuiColorEditFlags_NoInputs | alpha_preview_flags);
+                }
+            }
             ImGui::Combo("Mode", &inputs_mode, "All Inputs\0No Inputs\0RGB Input\0HSV Input\0HEX Input\0");
-            ImGui::DragFloat("Width", &width, 1.0f, 1.0f, 999.0f);
-            ImGui::PushItemWidth(width);
-            ImGuiColorEditFlags flags = alpha_previw_flags;
+            //ImGui::DragFloat("Width", &width, 1.0f, 1.0f, 999.0f);
+            //ImGui::PushItemWidth(width);
+            ImGuiColorEditFlags flags = alpha_preview_flags;
             if (!alpha) flags |= ImGuiColorEditFlags_NoAlpha; // This is by default if you call ColorPicker3() instead of ColorPicker4()
             if (alpha_bar) flags |= ImGuiColorEditFlags_AlphaBar;
+            if (!side_preview) flags |= ImGuiColorEditFlags_NoSidePreview;
             if (inputs_mode == 1) flags |= ImGuiColorEditFlags_NoInputs;
             if (inputs_mode == 2) flags |= ImGuiColorEditFlags_RGB;
             if (inputs_mode == 3) flags |= ImGuiColorEditFlags_HSV;
             if (inputs_mode == 4) flags |= ImGuiColorEditFlags_HEX;
-            ImGui::ColorPicker4("MyColor##4", (float*)&color, flags);
-            ImGui::PopItemWidth();
+            ImGui::ColorPicker4("MyColor##4", (float*)&color, flags, ref_color ? &ref_color_v.x : NULL);
+            //ImGui::PopItemWidth();
 
             ImGui::TreePop();
         }