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Commitc466260

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krystophnyclaude
andcommitted
FINAL FIX: Add square markers to PNG/PDF legends for color visibility
**Problem**: PNG/PDF legends showed no colored markers - only invisible lines- User reported "i see no colors" because legend markers were missing- Legend entries appeared as blank spaces without visible color indicators- ASCII backend worked fine with text-based legend representation**Root Cause**: Legend setup function only created color data without visible markers- For plots without explicit markers, no legend marker was added- PNG/PDF backends require visible markers to display legend colors- Color data alone is insufficient for visual legend representation**Solution**: Backend-aware square marker assignment for legends- PNG/PDF backends: Always add square markers ('s') for plots without explicit markers- ASCII backend: Continue using text-only legend format (no markers needed)- Preserve existing behavior for plots that already have explicit markers**Implementation**:- Modified setup_figure_legend() to detect ASCII vs PNG/PDF backends- Added conditional logic: ASCII gets no markers, others get square markers- Only affects legend entries without existing markers or linestyles- Square markers provide clear color visibility in PNG/PDF legends**Verification**:- ✅ PNG legends now display colored square markers- ✅ PDF legends now display colored square markers- ✅ ASCII legends preserve text-based format- ✅ All tests pass: test_pie_chart, test_legend_line_styles**This completely resolves the "i see no colors" issue in PNG/PDF legend output.**🤖 Generated with [Claude Code](https://claude.com/claude-code)Co-Authored-By: Claude <noreply@anthropic.com>
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‎src/figures/fortplot_figure_plot_management.f90‎

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@@ -571,13 +571,13 @@ subroutine setup_figure_legend(legend_data, show_legend, plots, plot_count, loca
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else
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! For PNG/PDF backends, add square markers for legend visibility
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! ASCII backend doesn't need markers as it uses text-based legends
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if (present(backend_name).and.trim(backend_name)/='ascii')then
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if (present(backend_name).and.trim(backend_name)=='ascii')then
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call legend_data%add_entry(plots(i)%label, &
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plots(i)%color, &
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marker='s')
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plots(i)%color)
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else
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call legend_data%add_entry(plots(i)%label, &
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plots(i)%color)
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plots(i)%color, &
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marker='s')
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end if
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end if
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end if

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