Fix base_colors using available colormaps directly

Author: tupui

panel/app.py

@@ -12,7 +12,7 @@
 from panel.layout.gridstack import GridStack
 
 import simdec as sd
-from simdec.visualization import single_color_to_colormap
+from simdec.visualization import sequential_cmaps, single_color_to_colormap
 
 
 # panel app
@@ -153,10 +153,14 @@ def decomposition(dec_limit, si, inputs, output):
 
 @pn.cache
 def base_colors(res):
-    all_colors = sd.palette(res.states)
-    colors = all_colors[:: res.states[0]]
-    colors = [mpl.colors.rgb2hex(color, keep_alpha=False) for color in colors]
-    return colors[: res.states[0]]  # ensure not more colors than states
+    colors = []
+    # ensure not more colors than states
+    for cmap in sequential_cmaps()[: res.states[0]]:
+        color = cmap.resampled(1)(1)
+        color = mpl.colors.rgb2hex(color, keep_alpha=False)
+        colors.append(color)
+
+    return colors
 
 
 def update_colors_select(event):

src/simdec/visualization.py

@@ -48,7 +48,7 @@ def sequential_cmaps():
             cmap_ = mpl.colormaps[cmap]
         except KeyError:
             color = mpl.colors.hex2color(cmap)
-            cmap_ = single_color_to_colormap(color)
+            cmap_ = single_color_to_colormap(color, factor=0.0)
         cmaps.append(cmap_)
     return cmaps