UI: Use alternating row theme color in file browser

The outliner already uses the alternating row theme color as an
overlay for every other row. This uses the same color for the file
browser, instead of a hardcoded shading.

The file browser background color is slightly tweaked to match the
outliner, and the Blender Light theme is updated to use a lighter
background color like the outliner.

Reviewed by: Hans Goudey, Julian Eisel

Differential Revision: https://developer.blender.org/D8717

3 files changed, 13 insertions, 1 deletions

diff --git a/source/blender/blenloader/intern/versioning_userdef.c b/source/blender/blenloader/intern/versioning_userdef.c
index 1437d46bd8d..d04907872b7 100644
--- a/source/blender/blenloader/intern/versioning_userdef.c
+++ b/source/blender/blenloader/intern/versioning_userdef.c
@@ -228,6 +228,11 @@ static void do_versions_theme(const UserDef *userdef, bTheme *btheme)
    */
   {
     /* Keep this block, even when empty. */
+
+    /* The new defaults for the file browser theme are the same as
+     * the outliner's, and it's less disruptive to just copy them. */
+    copy_v4_v4_uchar(btheme->space_file.back, btheme->space_outliner.back);
+    copy_v4_v4_uchar(btheme->space_file.row_alternate, btheme->space_outliner.row_alternate);
   }
 
 #undef FROM_DEFAULT_V4_UCHAR
diff --git a/source/blender/editors/space_file/file_draw.c b/source/blender/editors/space_file/file_draw.c
index 51e6c99ff39..7039eba7db1 100644
--- a/source/blender/editors/space_file/file_draw.c
+++ b/source/blender/editors/space_file/file_draw.c
@@ -441,7 +441,9 @@ static void draw_background(FileLayout *layout, View2D *v2d)
 
   uint pos = GPU_vertformat_attr_add(immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
   immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
-  immUniformThemeColorShade(TH_BACK, -7);
+  float col_alternating[4];
+  UI_GetThemeColor4fv(TH_ROW_ALTERNATE, col_alternating);
+  immUniformThemeColorBlend(TH_BACK, TH_ROW_ALTERNATE, col_alternating[3]);
 
   /* alternating flat shade background */
   for (i = 2; (i <= layout->rows + 1); i += 2) {
diff --git a/source/blender/makesrna/intern/rna_userdef.c b/source/blender/makesrna/intern/rna_userdef.c
index 2cee99cd372..699e08302e7 100644
--- a/source/blender/makesrna/intern/rna_userdef.c
+++ b/source/blender/makesrna/intern/rna_userdef.c
@@ -2478,6 +2478,11 @@ static void rna_def_userdef_theme_space_file(BlenderRNA *brna)
   RNA_def_property_array(prop, 3);
   RNA_def_property_ui_text(prop, "Selected File", "");
   RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
+
+  prop = RNA_def_property(srna, "row_alternate", PROP_FLOAT, PROP_COLOR_GAMMA);
+  RNA_def_property_array(prop, 4);
+  RNA_def_property_ui_text(prop, "Alternate Rows", "Overlay color on every other row");
+  RNA_def_property_update(prop, 0, "rna_userdef_theme_update");
 }
 
 static void rna_def_userdef_theme_space_outliner(BlenderRNA *brna)