JPEG "Multiple Compression" tool not wired into main window

[Gooichand]

Issue Summary

JPEG Multiple Compression tool entry has no corresponding widget in open_tool

Description

The JPEG group ([6] [JPEG]) contains four tools: Quality Estimation, Error Level Analysis, Multiple Compression, JPEG Ghost Maps.
In MainWindow.open_tool, the JPEG group only handles tool == 0 (QualityWidget), tool == 1 (ElaWidget), and tool == 3 (GhostmapWidget); there is no case for tool == 2 (Multiple Compression).
Users selecting "Multiple Compression" see no effect because tool_widget stays None and the function returns.

Steps to Reproduce

1. Launch LOOK-DGC, load an image.
2. Double-click [JPEG] → Multiple Compression in the tool tree.
3. Observe that no subwindow is created, unlike other JPEG tools.

Expected Result

Selecting "Multiple Compression" should open the corresponding analysis tool for detecting multiple JPEG compressions, as described in the README features.

Actual Result

No window or error is shown; the tool is effectively non-functional due to missing branch in open_tool.

Affected Files

• gui/tools.py
• gui/look-dgc.py

Suggested Fix

Implement a MultipleCompressionWidget (or similar) and add a elif tool == 2: branch under group == 6 in open_tool, or temporarily hide/disable the tool in ToolTree until implementation is ready.

[Tech-Psycho95]

Hi, I noticed that the "Multiple Compression" tool in the JPEG group doesn’t open because there’s no case for tool == 2 in MainWindow.open_tool. From reviewing the code, it looks like this branch is missing.

My plan:

• Implement a MultipleCompressionWidget similar to the other JPEG tool widgets.
• Add an elif tool == 2 branch under group == 6 in open_tool.
• Verify that selecting "Multiple Compression" opens the correct subwindow.

Would you like me to proceed with this approach, or do you prefer temporarily disabling the tool until the widget is fully implemented?

[Gooichand]

@Tech-Psycho95 Great analysis! Please go ahead with implementing MultipleCompressionWidget.

Your approach is correct:

1. Study existing JPEG widgets (QualityWidget, ElaWidget) for structure
2. Implement the multiple compression detection logic
3. Add the elif tool == 2 branch in open_tool
4. Test thoroughly

Assigning this to you. Let me know if you need any guidance! 🎯

[Tech-Psycho95]

Thanks for the confirmation and assignment! I’ll start by reviewing the existing JPEG widgets for structure, then implement MultipleCompressionWidget and add the missing branch in open_tool. I’ll keep you updated on progress and reach out if I need guidance.

[Gooichand]

📢 Important: OSCG-26 Communication Update

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All contributors working on the DGC project, please note:

Nexfellow is now our primary communication platform for OSCG-26.

👉 Important announcement - Please like and follow:
https://www.nexfellow.com/post/698eac9c636efcd987385b54

This post contains critical project updates and information.

Thank you for your contributions! 🙏