Fix: Post-processing scripts do not run on "Send Print"

[wyl2003]

Problem

Post-processing scripts were executed correctly when exporting gcode files after slicing, but were not executed when sending gcode directly to the printer.

Root Cause

In BackgroundSlicingProcess.cpp, the finalize_gcode() function calls run_post_process_scripts() to execute post-processing scripts when exporting G-code. However, in SendToPrinter.cpp, the handle_send_gcode() function directly used the temporary G-code file path to send to the printer, bypassing the post-processing step entirely.

Solution

• Added libslic3r/GCode/PostProcessor.hpp header include in SendToPrinter.cpp
• Added run_post_process_scripts() call in handle_send_gcode() function after obtaining the gcode file path and before uploading
• Post-processing is only executed in non-gcode-only mode (consistent with export logic)
• Added exception handling to ensure post-processing failures don't block the send workflow

Files Changed

• src/slic3r/GUI/print_manage/App/SendToPrinter.cpp

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This should fix issue #449.