Added OpenPopupOnItemClick(); helper which mimic BeginPopupContextItem() but doesn't do the open.

Made the color popups uses this standard function so they handle reopening a context menu.

imgui.cpp

@@ -3446,7 +3446,7 @@ bool ImGui::IsItemActive()
 
 bool ImGui::IsItemClicked(int mouse_button)
 {
-    return IsMouseClicked(mouse_button) && IsItemHovered();
+    return IsMouseClicked(mouse_button) && IsItemHovered(ImGuiHoveredFlags_Default);
 }
 
 bool ImGui::IsAnyItemHovered()
@@ -3746,22 +3746,29 @@ void ImGui::EndPopup()
         PopStyleVar();
 }
 
+bool ImGui::OpenPopupOnItemClick(const char* str_id, int mouse_button)
+{
+    ImGuiWindow* window = GImGui->CurrentWindow;
+    if (IsMouseClicked(mouse_button) && IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByPopup))
+    {
+        ImGuiID id = str_id ? window->GetID(str_id) : window->DC.LastItemId; // If user hasn't passed an ID, we can use the LastItemID. Using LastItemID as a Popup ID won't conflict!
+        IM_ASSERT(id != 0);                                                  // However, you cannot pass a NULL str_id if the last item has no identifier (e.g. a Text() item)
+        OpenPopupEx(id, true);
+        return true;
+    }
+    return false;
+}
+
 // This is a helper to handle the simplest case of associating one named popup to one given widget.
-// 1. If you have many possible popups (for different "instances" of a same widget, or for wholly different widgets), you may be better off handling
-//    this yourself so you can store data relative to the widget that opened the popup instead of choosing different popup identifiers.
-// 2. If you want right-clicking on the same item to reopen the popup at new location, use the same code replacing IsItemHovered() with IsItemRectHovered()
-//    and passing true to the OpenPopupEx().
-//    This is because hovering an item in a window below the popup won't work. IsItemRectHovered() skips this test.
-//    The pattern of ignoring the fact that the item can be interacted with (because it is blocked by the active popup) may useful in some situation 
-//    when e.g. large canvas where the content of menu driven by click position.
+// You may want to handle this on user side if you have specific needs (e.g. tweaking IsItemHovered() parameters).
+// You can pass a NULL str_id to use the identifier of the last item.
 bool ImGui::BeginPopupContextItem(const char* str_id, int mouse_button)
 {
     ImGuiWindow* window = GImGui->CurrentWindow;
     ImGuiID id = str_id ? window->GetID(str_id) : window->DC.LastItemId; // If user hasn't passed an ID, we can use the LastItemID. Using LastItemID as a Popup ID won't conflict!
     IM_ASSERT(id != 0);                                                  // However, you cannot pass a NULL str_id if the last item has no identifier (e.g. a Text() item)
-    if (IsMouseClicked(mouse_button))
-        if (IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByPopup))
-            OpenPopupEx(id, true);
+    if (IsMouseClicked(mouse_button) && IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByPopup))
+        OpenPopupEx(id, true);
     return BeginPopupEx(id, ImGuiWindowFlags_ShowBorders | ImGuiWindowFlags_AlwaysAutoResize);
 }
 
@@ -9575,8 +9582,8 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
                 value_changed |= value_changed_as_float |= DragFloat(ids[n], &f[n], 1.0f/255.0f, 0.0f, hdr ? 0.0f : 1.0f, fmt_table_float[fmt_idx][n]);
             else
                 value_changed |= DragInt(ids[n], &i[n], 1.0f, 0, hdr ? 0 : 255, fmt_table_int[fmt_idx][n]);
-            if (!(flags & ImGuiColorEditFlags_NoOptions) && IsItemHovered() && IsMouseClicked(1))
-                OpenPopup("context");
+            if (!(flags & ImGuiColorEditFlags_NoOptions))
+                OpenPopupOnItemClick("context");
         }
         PopItemWidth();
         PopItemWidth();
@@ -9602,8 +9609,8 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
             else
                 sscanf(p, "%02X%02X%02X", (unsigned int*)&i[0], (unsigned int*)&i[1], (unsigned int*)&i[2]);
         }
-        if (!(flags & ImGuiColorEditFlags_NoOptions) && IsItemHovered() && IsMouseClicked(1))
-            OpenPopup("context");
+        if (!(flags & ImGuiColorEditFlags_NoOptions))
+            OpenPopupOnItemClick("context");
         PopItemWidth();
     }
 
@@ -9624,9 +9631,9 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
                 SetNextWindowPos(window->DC.LastItemRect.GetBL() + ImVec2(-1,style.ItemSpacing.y));
             }
         }
-        if (!(flags & ImGuiColorEditFlags_NoOptions) && IsItemHovered() && IsMouseClicked(1))
-            OpenPopup("context");
-
+        if (!(flags & ImGuiColorEditFlags_NoOptions))
+            OpenPopupOnItemClick("context");
+        
         if (BeginPopup("picker"))
         {
             picker_active = true;
@@ -9791,8 +9798,8 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
                 value_changed = value_changed_sv = true;
             }
         }
-        if (!(flags & ImGuiColorEditFlags_NoOptions) && IsItemHovered() && IsMouseClicked(1))
-            OpenPopup("context");
+        if (!(flags & ImGuiColorEditFlags_NoOptions))
+            OpenPopupOnItemClick("context");
     }
     else if (flags & ImGuiColorEditFlags_PickerHueBar)
     {
@@ -9804,8 +9811,8 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
             V = 1.0f - ImSaturate((io.MousePos.y - picker_pos.y) / (sv_picker_size-1));
             value_changed = value_changed_sv = true;
         }
-        if (!(flags & ImGuiColorEditFlags_NoOptions) && IsItemHovered() && IsMouseClicked(1))
-            OpenPopup("context");
+        if (!(flags & ImGuiColorEditFlags_NoOptions))
+            OpenPopupOnItemClick("context");
 
         // Hue bar logic
         SetCursorScreenPos(ImVec2(bar0_pos_x, picker_pos.y));

imgui.h

@@ -390,11 +390,12 @@ namespace ImGui
 
     // Popups
     IMGUI_API void          OpenPopup(const char* str_id);                                      // call to mark popup as open (don't call every frame!). popups are closed when user click outside, or if CloseCurrentPopup() is called within a BeginPopup()/EndPopup() block. By default, Selectable()/MenuItem() are calling CloseCurrentPopup(). Popup identifiers are relative to the current ID-stack (so OpenPopup and BeginPopup needs to be at the same level).
+    IMGUI_API bool          OpenPopupOnItemClick(const char* str_id = NULL, int mouse_button = 1);                                  // helper to open popup when clicked on last item. return true when just opened.
     IMGUI_API bool          BeginPopup(const char* str_id);                                     // return true if the popup is open, and you can start outputting to it. only call EndPopup() if BeginPopup() returned true!
     IMGUI_API bool          BeginPopupModal(const char* name, bool* p_open = NULL, ImGuiWindowFlags extra_flags = 0);               // modal dialog (block interactions behind the modal window, can't close the modal window by clicking outside)
     IMGUI_API bool          BeginPopupContextItem(const char* str_id = NULL, int mouse_button = 1);                                 // helper to open and begin popup when clicked on last item. if you can pass a NULL str_id only if the previous item had an id. If you want to use that on a non-interactive item such as Text() you need to pass in an explicit ID here. read comments in .cpp!
     IMGUI_API bool          BeginPopupContextWindow(const char* str_id = NULL, int mouse_button = 1, bool also_over_items = true);  // helper to open and begin popup when clicked on current window.
-    IMGUI_API bool          BeginPopupContextVoid(const char* str_id = NULL, int mouse_button = 1);                                 // helper to open and begin popup when clicked in void (no window).
+    IMGUI_API bool          BeginPopupContextVoid(const char* str_id = NULL, int mouse_button = 1);                                 // helper to open and begin popup when clicked in void (where there are no imgui windows).
     IMGUI_API void          EndPopup();
     IMGUI_API bool          IsPopupOpen(const char* str_id);                                    // return true if the popup is open
     IMGUI_API void          CloseCurrentPopup();                                                // close the popup we have begin-ed into. clicking on a MenuItem or Selectable automatically close the current popup.