change default behavior

README.org

@@ -15,7 +15,13 @@
     If you have a recent version of the [[https://nixos.org/][Nix package manager]] installed and flakes are enabled, run huepaper like this:
 
     #+begin_example sh
-      nix run github:Deleh/huepaper -- --help
+      nix run github:Deleh/huepaper
+    #+end_example
+
+    Parameters can be passed by appending a double-dash:
+
+    #+begin_example sh
+      nix run github:Deleh/huepaper -- -hue 0.5 --color lightblue
     #+end_example
     
     Global installation can be done by including this flake in your flaked NixOS configuration as always :)
@@ -26,7 +32,7 @@
 
     #+begin_example sh
       pip install -r requirements.txt
-      ./huepaper.py --help
+      ./huepaper.py
     #+end_example
 
     To install it in your Python environment run:
@@ -38,8 +44,7 @@
 ** Usage
 
    #+begin_example text
-     usage: huepaper [-h] [-s SIZE] [-c COLOR] [-p] [-o OUTPUT] [-l [LINES]] [-lb [LINES_BRIGHT]] [-ld [LINES_DARK]] [-P [PIXELATE]] [-e EMBLEM] [-hue HUE] [-smin SMIN]
+     usage: huepaper [-h] [-s SIZE] [-c COLOR] [-np] [-o OUTPUT] [-l [LINES]] [-lb [LINES_BRIGHT]] [-ld [LINES_DARK]] [-P [PIXELATE]] [-e EMBLEM] [-hue HUE] [-smin SMIN] [-smax SMAX] [-lmin LMIN] [-lmax LMAX]
-                     [-smax SMAX] [-lmin LMIN] [-lmax LMAX]
 
      Create wallpapers based on color hues.
 
@@ -47,10 +52,10 @@
        -h, --help            show this help message and exit
        -s SIZE, --size SIZE  size of huepaper in the form WIDTHxHEIGHT (default: 1920x1080)
        -c COLOR, --color COLOR
-                             color, the huepaper is generated from (uses a random color if not given)
+                             base color from which the huepaper is generated (default: random color)
-       -p, --preview         preview huepaper
+       -np, --no-preview     don't preview the huepaper
        -o OUTPUT, --output OUTPUT
-                             file where to save the huepaper to (default: None)
+                             filepath where the huepaper will be saved
        -l [LINES], --lines [LINES]
                              include one to three random lines in base color with given opacity in range [0, 1] (default: 0.3)
        -lb [LINES_BRIGHT], --lines_bright [LINES_BRIGHT]
@@ -91,39 +96,39 @@
    #+caption: Huepaper 1
    [[./images/huepaper_1.png]]
 
- =huepaper -p=
+ =huepaper=
 
    --------------
 
    #+caption: Huepaper 1
    [[./images/huepaper_2.png]]
 
- =huepaper -p -c lightgreen=
+ =huepaper -c lightgreen=
 
    --------------
 
    #+caption: Huepaper 3
    [[./images/huepaper_3.png]]
 
- =huepaper -p -c "#ff7f50" -lb 0.05=
+ =huepaper -c "#ff7f50" -lb 0.05=
 
    --------------
 
    #+caption: Huepaper 4
    [[./images/huepaper_4.png]]
 
- =huepaper -p -hue 1.0 -lmin 0.3 -lmax 0.6 -smin 0.8 -smax 1.0=
+ =huepaper -hue 1.0 -lmin 0.3 -lmax 0.6 -smin 0.8 -smax 1.0=
 
    --------------
 
    #+caption: Huepaper 5
    [[./images/huepaper_5.png]]
 
- =huepaper -p -hue 0.3 -lmin 0.5 -lmax 0.5 -l 0.5 -P 64x36=
+ =huepaper -hue 0.3 -lmin 0.5 -lmax 0.5 -l 0.5 -P 64x36=
 
    --------------
 
    #+caption: Huepaper 6
    [[./images/huepaper_6.png]]
 
- =huepaper -p -l -lb -ld -e nixos.png=
+ =huepaper -l -lb -ld -e nixos.png=

huepaper.py

@@ -42,11 +42,13 @@ if __name__ == "__main__":
     parser.add_argument(
         "-c",
         "--color",
-        help="color, the huepaper is generated from (uses a random color if not given)",
+        help="base color from which the huepaper is generated (default: random color)",
     )
-    parser.add_argument("-p", "--preview", action="store_true", help="preview huepaper")
     parser.add_argument(
-        "-o", "--output", help="file where to save the huepaper to (default: None)"
+        "-np", "--no-preview", action="store_true", help="don't preview the huepaper"
+    )
+    parser.add_argument(
+        "-o", "--output", help="filepath where the huepaper will be saved"
     )
     parser.add_argument(
         "-l",
@@ -117,7 +119,7 @@ if __name__ == "__main__":
     args = parser.parse_args()
     size = args.size
     color = args.color
-    preview = args.preview
+    no_preview = args.no_preview
     output = args.output
     lines = args.lines
     lines_bright = args.lines_bright
@@ -139,8 +141,8 @@ if __name__ == "__main__":
         parser.error("The size must be given in form: 1920x1080")
 
     # Check preconditions
-    if not preview and not output:
+    if no_preview and not output:
-        parser.error("You must either set -p (--preview) or -o (--output)")
+        parser.error("You must either omit -np (--no-preview) or set -o (--output)")
     if pixelate:
         try:
             values = pixelate.split("x")
@@ -171,7 +173,7 @@ if __name__ == "__main__":
 
     image.mode = "RGB"
 
-    if preview:
+    if not no_preview:
         image.show()
         if not output:
             save = input("Do you want to save the image? [y/N] ")