如何在 Ruby 中轻松设置 curses window 背景颜色？

Question

下面的 ruby 代码通过 Curses 打印两个 windows（重叠）。第一个 "border" window 在 black/cyan 中打印，"content" window 在青色上以蓝色打印。

内容window只显示打印文本的背景颜色。其余内容 window 保持黑色。 ruby dox 描述了使用 color_set、bkgd 或 bkgdset 方法操纵 window 背景的方法。然而，我只能让 color_set() 工作，并且只能用于正在打印的文本：

如何用适当的背景颜色填充内容 window 的重置？我找到了 Set a window's background color in Ruby curses 的一些代码，但它似乎不起作用并且很旧。我唯一的另一个想法是用空格右填充字符串以用背景字符填充整个 window 但这看起来很老套。

编辑：添加代码

EDIT2：添加了"hacky padding"解决方法

    #!/usr/bin/ruby

    require 'curses'

    Curses.init_screen
    Curses.start_color
    Curses.noecho
    Curses.cbreak


    Curses.refresh  # Refresh the screen

    xulc = 10
    yulc = 10
    width = 30
    height = 8

    # text color for border window
    Curses.init_pair(1, Curses::COLOR_BLACK, Curses::COLOR_CYAN)
    Curses.attrset(Curses.color_pair(1) | Curses::A_BOLD)

    # Text color for content window
    Curses.init_pair(2, Curses::COLOR_BLUE, Curses::COLOR_CYAN)
    Curses.attrset(Curses.color_pair(2) | Curses::A_NORMAL)

    # border window   
    win1 = Curses::Window.new(height, width, yulc, xulc)
    win1.color_set(1)
    win1.box("|", "-")

    # content window
    win2 = Curses::Window.new(height - 2, width - 2, yulc + 1, xulc + 1)
    win2.color_set(2)
    win2.setpos(0, 0)

    # only prints in background color where there is text!
    # add hacky padding to fill background then go back and print message
    bg_padding = " " * ((width - 2) * (height - 2));
    win2.addstr(bg_padding);
    win2.setpos(0, 0)
    win2.addstr("blah")

    # prints without the color_set() attributes
    #win2.bkgd ('.'.ord)

    # make content visisble
    win1.refresh
    win2.refresh

    # hit a key to exit curses 
    Curses.getch 
    Curses.close_screen

Answer 1

好的，所以我找到了this，实际代码在这里：

It's been a while, but maybe my examples are still useful:

It is the same "diamonds" for me when using

window.bkgd(COLOR_RED) This seems to appear, because the bkgd method takes a char and prints it to all free spaces of the window (see old doc).

However, then you can use a color pair with the wanted background color and apply it to all screen positions before writing oher stuff.

Here is how I solved it:

require 'curses'    

init_screen
start_color

init_pair(COLOR_RED, COLOR_WHITE, COLOR_RED)
window = Curses::Window.new(0, 0, 0, 0)

window.attron(color_pair(COLOR_RED)) do
  lines.times do |line|
    window.setpos(line, 0)
    window << ' ' * cols
  end
end

还发现this:

# color_set(col)
# Sets the current color of the given window to the foreground/background
# combination described by the Fixnum col.
main_window.color_set(1)

tutorial.html#颜色初始化

Answer 2

我猜我会使用 hacky padding 解决方法。似乎是我目前所发现的全部

如何在 Ruby 中轻松设置 curses window 背景颜色？

How can I easily set the curses window background color in Ruby?

ruby

curses