+//-----------------------------------------------------------------------------
+// Misc data structures
+//-----------------------------------------------------------------------------
+
+// Shared state of InputText(), passed as an argument to your callback when a ImGuiInputTextFlags_Callback* flag is used.
+// The callback function should return 0 by default.
+// Callbacks (follow a flag name and see comments in ImGuiInputTextFlags_ declarations for more details)
+// - ImGuiInputTextFlags_CallbackCompletion: Callback on pressing TAB
+// - ImGuiInputTextFlags_CallbackHistory: Callback on pressing Up/Down arrows
+// - ImGuiInputTextFlags_CallbackAlways: Callback on each iteration
+// - ImGuiInputTextFlags_CallbackCharFilter: Callback on character inputs to replace or discard them. Modify 'EventChar' to replace or discard, or return 1 in callback to discard.
+// - ImGuiInputTextFlags_CallbackResize: Callback on buffer capacity changes request (beyond 'buf_size' parameter value), allowing the string to grow.
+struct ImGuiInputTextCallbackData
+{
+ ImGuiInputTextFlags EventFlag; // One ImGuiInputTextFlags_Callback* // Read-only
+ ImGuiInputTextFlags Flags; // What user passed to InputText() // Read-only
+ void* UserData; // What user passed to InputText() // Read-only
+
+ // Arguments for the different callback events
+ // - To modify the text buffer in a callback, prefer using the InsertChars() / DeleteChars() function. InsertChars() will take care of calling the resize callback if necessary.
+ // - If you know your edits are not going to resize the underlying buffer allocation, you may modify the contents of 'Buf[]' directly. You need to update 'BufTextLen' accordingly (0 <= BufTextLen < BufSize) and set 'BufDirty'' to true so InputText can update its internal state.
+ ImWchar EventChar; // Character input // Read-write // [CharFilter] Replace character with another one, or set to zero to drop. return 1 is equivalent to setting EventChar=0;
+ ImGuiKey EventKey; // Key pressed (Up/Down/TAB) // Read-only // [Completion,History]
+ char* Buf; // Text buffer // Read-write // [Resize] Can replace pointer / [Completion,History,Always] Only write to pointed data, don't replace the actual pointer!
+ int BufTextLen; // Text length (in bytes) // Read-write // [Resize,Completion,History,Always] Exclude zero-terminator storage. In C land: == strlen(some_text), in C++ land: string.length()
+ int BufSize; // Buffer size (in bytes) = capacity+1 // Read-only // [Resize,Completion,History,Always] Include zero-terminator storage. In C land == ARRAYSIZE(my_char_array), in C++ land: string.capacity()+1
+ bool BufDirty; // Set if you modify Buf/BufTextLen! // Write // [Completion,History,Always]
+ int CursorPos; // // Read-write // [Completion,History,Always]
+ int SelectionStart; // // Read-write // [Completion,History,Always] == to SelectionEnd when no selection)
+ int SelectionEnd; // // Read-write // [Completion,History,Always]
+
+ // Helper functions for text manipulation.
+ // Use those function to benefit from the CallbackResize behaviors. Calling those function reset the selection.
+ IMGUI_API ImGuiInputTextCallbackData();
+ IMGUI_API void DeleteChars(int pos, int bytes_count);
+ IMGUI_API void InsertChars(int pos, const char* text, const char* text_end = NULL);
+ bool HasSelection() const { return SelectionStart != SelectionEnd; }
+};
+
+// Resizing callback data to apply custom constraint. As enabled by SetNextWindowSizeConstraints(). Callback is called during the next Begin().
+// NB: For basic min/max size constraint on each axis you don't need to use the callback! The SetNextWindowSizeConstraints() parameters are enough.
+struct ImGuiSizeCallbackData
+{
+ void* UserData; // Read-only. What user passed to SetNextWindowSizeConstraints()
+ ImVec2 Pos; // Read-only. Window position, for reference.
+ ImVec2 CurrentSize; // Read-only. Current window size.
+ ImVec2 DesiredSize; // Read-write. Desired size, based on user's mouse position. Write to this field to restrain resizing.
+};
+
+// Data payload for Drag and Drop operations: AcceptDragDropPayload(), GetDragDropPayload()
+struct ImGuiPayload
+{
+ // Members
+ void* Data; // Data (copied and owned by dear imgui)
+ int DataSize; // Data size
+
+ // [Internal]
+ ImGuiID SourceId; // Source item id
+ ImGuiID SourceParentId; // Source parent id (if available)
+ int DataFrameCount; // Data timestamp
+ 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.
+
+ ImGuiPayload() { Clear(); }
+ void Clear() { SourceId = SourceParentId = 0; Data = NULL; DataSize = 0; memset(DataType, 0, sizeof(DataType)); DataFrameCount = -1; Preview = Delivery = false; }
+ bool IsDataType(const char* type) const { return DataFrameCount != -1 && strcmp(type, DataType) == 0; }
+ bool IsPreview() const { return Preview; }
+ bool IsDelivery() const { return Delivery; }
+};
+