Drag and Drop: Increased payload data type to 32 characters. (#143)

CHANGELOG.txt

@@ -111,7 +111,7 @@ Other Changes:
 - Columns: Fixed a memory leak of ImGuiColumnsSet's Columns vector. (#1529) [@unprompted]
 - MenuBar: Fixed menu bar pushing a clipping rect outside of its allocated bound (usually unnoticeable).
 - TreeNode: nodes with the ImGuiTreeNodeFlags_Leaf flag correctly disable highlight when DragDrop is active. (#143, #581)
-- Drag and Drop: Increased payload type string to 12 characters instead of 8. (#143)
+- Drag and Drop: Increased payload type string to 32 characters instead of 8. (#143)
 - Drag and Drop: TreeNode as drop target displays rectangle over full frame. (#1597, #143)
 - DragFloat: Fix/workaround for backends which do not preserve a valid mouse position when dragged out of bounds. (#1559)
 - Slider, Combo: Use ImGuiCol_FrameBgHovered color when hovered. (#1456) [@stfx]

imgui.h

@@ -458,7 +458,7 @@ namespace ImGui
     // Drag and Drop
     // [BETA API] Missing Demo code. API may evolve.
     IMGUI_API bool          BeginDragDropSource(ImGuiDragDropFlags flags = 0);                                      // call when the current item is active. If this return true, you can call SetDragDropPayload() + EndDragDropSource()
-    IMGUI_API bool          SetDragDropPayload(const char* type, const void* data, size_t size, ImGuiCond cond = 0);// type is a user defined string of maximum 12 characters. Strings starting with '_' are reserved for dear imgui internal types. Data is copied and held by imgui.
+    IMGUI_API bool          SetDragDropPayload(const char* type, const void* data, size_t size, ImGuiCond cond = 0);// type is a user defined string of maximum 32 characters. Strings starting with '_' are reserved for dear imgui internal types. Data is copied and held by imgui.
     IMGUI_API void          EndDragDropSource();                                                                    // only call EndDragDropSource() if BeginDragDropSource() returns true!
     IMGUI_API bool          BeginDragDropTarget();                                                                  // call after submitting an item that may receive an item. If this returns true, you can call AcceptDragDropPayload() + EndDragDropTarget()
     IMGUI_API const ImGuiPayload* AcceptDragDropPayload(const char* type, ImGuiDragDropFlags flags = 0);            // accept contents of a given type. If ImGuiDragDropFlags_AcceptBeforeDelivery is set you can peek into the payload before the mouse button is released.
@@ -1348,7 +1348,7 @@ struct ImGuiPayload
     ImGuiID         SourceId;           // Source item id
     ImGuiID         SourceParentId;     // Source parent id (if available)
     int             DataFrameCount;     // Data timestamp
-    char            DataType[12 + 1];   // Data type tag (short user-supplied string, 12 characters max)
+    char            DataType[32+1];     // Data type tag (short user-supplied string, 32 characters max)
     bool            Preview;            // Set when AcceptDragDropPayload() was called and mouse has been hovering the target item (nb: handle overlapping drag targets)
     bool            Delivery;           // Set when AcceptDragDropPayload() was called and mouse button is released over the target item.
 

imgui_internal.h

@@ -662,7 +662,7 @@ struct ImGuiContext
     ImGuiID                 DragDropAcceptIdPrev;               // Target item id from previous frame (we need to store this to allow for overlapping drag and drop targets)
     int                     DragDropAcceptFrameCount;           // Last time a target expressed a desire to accept the source
     ImVector<unsigned char> DragDropPayloadBufHeap;             // We don't expose the ImVector<> directly
-    unsigned char           DragDropPayloadBufLocal[8];
+    unsigned char           DragDropPayloadBufLocal[8];         // Local buffer for small payloads
 
     // Widget state
     ImGuiTextEditState      InputTextState;