commit 6ea744d8f42cd8b5bd89562126712ddd79700721
author omar <omarcornut@gmail.com> Thu Nov 30 16:54:39 2017 +0100
committer omar <omarcornut@gmail.com> Thu Nov 30 16:54:39 2017 +0100
tree 55ffdcfd13fd1b20d695c91ebb50857450a3e630
parent 63712d5f5c9a81afba1c837d59b23c702c8e92de

Drag and Drop: Added DragSource from color square. Added DragTarget on ColorEdit4 widget. (#143)

imgui.cpp

diff --git a/imgui.cpp b/imgui.cpp
index a21cba8..280a243 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -9671,6 +9671,16 @@
     else
         window->DrawList->AddRect(bb.Min, bb.Max, GetColorU32(ImGuiCol_FrameBg), rounding); // Color button are often in need of some sort of border
 
+    if (g.ActiveId == id && BeginDragDropSource()) // NB: The ActiveId test is merely an optional micro-optimization
+    {
+        SetDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F, &col, sizeof(col), ImGuiCond_Once);
+        ColorButton(desc_id, col, flags);
+        SameLine();
+        TextUnformatted("Color");
+        EndDragDropSource();
+        hovered = false;
+    }
+
     if (!(flags & ImGuiColorEditFlags_NoTooltip) && hovered)
         ColorTooltip(desc_id, &col.x, flags & (ImGuiColorEditFlags_NoAlpha | ImGuiColorEditFlags_AlphaPreview | ImGuiColorEditFlags_AlphaPreviewHalf));
 
@@ -9947,6 +9957,17 @@
     PopID();
     EndGroup();
 
+    if (window->DC.LastItemRectHoveredRect && BeginDragDropTarget()) // NB: The LastItemRectHoveredRect test is merely an optional micro-optimization
+    {
+        if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F))
+        {
+            IM_ASSERT(payload->DataSize == sizeof(ImVec4));
+            memcpy((float*)col, payload->Data, sizeof(ImVec4));
+            value_changed = true;
+        }
+        EndDragDropTarget();
+    }
+
     return value_changed;
 }