Merged
Conversation
Add drag-and-drop support alongside the existing two-click piece movement. Uses tkinter ButtonPress/ButtonRelease bindings on each board square button to detect when a piece is dragged from one square to another. The target square is determined via winfo_containing() and the move is injected into the FreeSimpleGUI event loop via write_event_value(), where the existing move validation and execution code handles it. Agent-Logs-Url: https://github.com/fsmosca/Python-Easy-Chess-GUI/sessions/8a412d60-5a44-4b76-91b9-d11bd4e558c2 Co-authored-by: fsmosca <22366935+fsmosca@users.noreply.github.com>
…gging Agent-Logs-Url: https://github.com/fsmosca/Python-Easy-Chess-GUI/sessions/8a412d60-5a44-4b76-91b9-d11bd4e558c2 Co-authored-by: fsmosca <22366935+fsmosca@users.noreply.github.com>
Copilot created this pull request from a session on behalf of
fsmosca
March 29, 2026 02:54
View session
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Adds drag-and-drop piece movement alongside the existing two-click system. Users can now press on a piece, drag to a destination square, and release to make a move.
Approach
Uses tkinter's
ButtonPress-1/ButtonRelease-1bindings on the existingRButtonboard squares. On release,winfo_containing()resolves the target square under the cursor. If source ≠ target, a__drag_move__event is injected into FreeSimpleGUI's event queue viawrite_event_value().The drag handler in
play_game()sets upmove_from,piece,moved_piece,move_state=1, and reassignsbutton = drag_to— letting the existingmove_state==1code path handle validation, execution, promotion, castling, en passant, and all UI updates with zero duplication.Changes
__init__— drag state variables (_drag_source,_widget_to_square,_drag_window)setup_board_drag_drop(window)— binds press/release events to all 64 square widgets, builds widget→square reverse mapping_on_drag_press/_on_drag_release— tracks source on press; on release, resolves target viawinfo_containing()with widget hierarchy walk, injects__drag_move__eventplay_game()event loop — converts__drag_move__into the existing move-state machine (handles mid-click override gracefully)create_new_window()— re-binds drag events when the board is flipped/recreatedmain_loop()— initial binding after window finalization