Module: RNDK::Draw

Defined in:
lib/rndk/core/draw.rb

Class Method Summary collapse

Class Method Details

.attrbox(win, tlc, trc, blc, brc, horz, vert, attr) ⇒ Object

This draws a box with attributes and lets the user define each element of the box



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# File 'lib/rndk/core/draw.rb', line 31

def Draw.attrbox(win, tlc, trc, blc, brc, horz, vert, attr)
  x1 = 0
  y1 = 0
  y2 = Ncurses.getmaxy(win) - 1
  x2 = Ncurses.getmaxx(win) - 1
  count = 0

  # Draw horizontal lines
  if horz != 0
    Ncurses.mvwhline(win, y1, 0, horz | attr, Ncurses.getmaxx(win))
    Ncurses.mvwhline(win, y2, 0, horz | attr, Ncurses.getmaxx(win))
    count += 1
  end

  # Draw vertical lines
  if vert != 0
    Ncurses.mvwvline(win, 0, x1, vert | attr, Ncurses.getmaxy(win))
    Ncurses.mvwvline(win, 0, x2, vert | attr, Ncurses.getmaxy(win))
    count += 1
  end

  # Draw in the corners.
  if tlc != 0
    Ncurses.mvwaddch(win, y1, x1, tlc | attr)
    count += 1
  end
  if trc != 0
    Ncurses.mvwaddch(win, y1, x2, trc | attr)
    count += 1
  end
  if blc != 0
    Ncurses.mvwaddch(win, y2, x1, blc | attr)
    count += 1
  end
  if brc != 0
    Ncurses.mvwaddch(win, y2, x2, brc | attr)
    count += 1
  end
  if count != 0
    Ncurses.wrefresh win
  end
end

.boxWindow(window, attr) ⇒ Object

This prints out a box around a window with attributes



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# File 'lib/rndk/core/draw.rb', line 7

def Draw.boxWindow(window, attr)
  tlx = 0
  tly = 0
  brx = Ncurses.getmaxx(window) - 1
  bry = Ncurses.getmaxy(window) - 1

  # Draw horizontal lines.
  Ncurses.mvwhline(window, tly, 0, Ncurses::ACS_HLINE | attr, Ncurses.getmaxx(window))
  Ncurses.mvwhline(window, bry, 0, Ncurses::ACS_HLINE | attr, Ncurses.getmaxx(window))

  # Draw horizontal lines.
  Ncurses.mvwvline(window, 0, tlx, Ncurses::ACS_VLINE | attr, Ncurses.getmaxy(window))
  Ncurses.mvwvline(window, 0, brx, Ncurses::ACS_VLINE | attr, Ncurses.getmaxy(window))

  # Draw in the corners.
  Ncurses.mvwaddch(window, tly, tlx, Ncurses::ACS_ULCORNER | attr)
  Ncurses.mvwaddch(window, tly, brx, Ncurses::ACS_URCORNER | attr)
  Ncurses.mvwaddch(window, bry, tlx, Ncurses::ACS_LLCORNER | attr)
  Ncurses.mvwaddch(window, bry, brx, Ncurses::ACS_LRCORNER | attr)
  Ncurses.wrefresh(window)
end

.drawLine(window, startx, starty, endx, endy, line) ⇒ Object

This draws a line on the given window. (odd angle lines not working yet)



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# File 'lib/rndk/core/draw.rb', line 83

def Draw.drawLine(window, startx, starty, endx, endy, line)
  xdiff = endx - startx
  ydiff = endy - starty
  x = 0
  y = 0

  # Determine if we're drawing a horizontal or vertical line.
  if ydiff == 0
    if xdiff > 0
      Ncurses.mvwhline(window, starty, startx, line, xdiff)
    end
  elsif xdiff == 0
    if ydiff > 0
      Ncurses.mvwvline(window, starty, startx, line, ydiff)
    end
  else
    # We need to determine the angle of the line.
    height = xdiff
    width = ydiff
    xratio = if height > width then 1 else width / height end
    yration = if width > height then width / height else 1 end
    xadj = 0
    yadj = 0

    # Set the vars
    x = startx
    y = starty
    while x!= endx && y != endy
      # Add the char to the window
      Ncurses.mvwaddch(window, y, x, line)

      # Make the x and y adjustments.
      if xadj != xratio
        x = if xdiff < 0 then x - 1 else x + 1 end
        xadj += 1
      else
        xadj = 0
      end
      if yadj != yratio
        y = if ydiff < 0 then y - 1 else y + 1 end
        yadj += 1
      else
        yadj = 0
      end
    end
  end
end

.drawObjBox(win, widget) ⇒ Object

Draw a box around the given window using the widget's defined line-drawing characters



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# File 'lib/rndk/core/draw.rb', line 76

def Draw.drawObjBox(win, widget)
  Draw.attrbox(win,
      widget.ULChar, widget.URChar, widget.LLChar, widget.LRChar,
      widget.HZChar, widget.VTChar, widget.BXAttr)
end

.drawShadow(shadow_win) ⇒ Object

This draws a shadow around a window.



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# File 'lib/rndk/core/draw.rb', line 132

def Draw.drawShadow(shadow_win)
  unless shadow_win.nil?
    x_hi = Ncurses.getmaxx(shadow_win) - 1
    y_hi = Ncurses.getmaxy(shadow_win) - 1

    # Draw the line on the bottom.
    Ncurses.mvwhline(shadow_win, y_hi, 1, Ncurses::ACS_HLINE | RNDK::Color[:dim], x_hi)

    # Draw the line on teh right.
    Ncurses.mvwvline(shadow_win, 0, x_hi, Ncurses::ACS_VLINE | RNDK::Color[:dim], y_hi)

    Ncurses.mvwaddch(shadow_win, 0, x_hi, Ncurses::ACS_URCORNER | RNDK::Color[:dim])
    Ncurses.mvwaddch(shadow_win, y_hi, 0, Ncurses::ACS_LLCORNER | RNDK::Color[:dim])
    Ncurses.mvwaddch(shadow_win, y_hi, x_hi, Ncurses::ACS_LRCORNER | RNDK::Color[:dim])
    Ncurses.wrefresh shadow_win
  end
end

.writeBlanks(window, xpos, ypos, align, start, endn) ⇒ Object

Write a string of blanks using writeChar()



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# File 'lib/rndk/core/draw.rb', line 151

def Draw.writeBlanks(window, xpos, ypos, align, start, endn)
  if start < endn
    want = (endn - start) + 1000
    blanks = ''

    RNDK.cleanChar(blanks, want - 1, ' ')
    Draw.writeChar(window, xpos, ypos, blanks, align, start, endn)
  end
end

.writeChar(window, xpos, ypos, string, align, start, endn) ⇒ Object

This writes out a char string with no attributes



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# File 'lib/rndk/core/draw.rb', line 162

def Draw.writeChar(window, xpos, ypos, string, align, start, endn)
  Draw.writeCharAttrib(window, xpos, ypos, string, RNDK::Color[:normal],
      align, start, endn)
end

.writeCharAttrib(window, xpos, ypos, string, attr, align, start, endn) ⇒ Object

This writes out a char string with attributes



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# File 'lib/rndk/core/draw.rb', line 168

def Draw.writeCharAttrib(window, xpos, ypos, string, attr, align,
    start, endn)
  display = endn - start

  if align == RNDK::HORIZONTAL
    # Draw the message on a horizontal axis
    display = [display, Ncurses.getmaxx(window) - 1].min
    (0...display).each do |x|
      Ncurses.mvwaddch(window, ypos, xpos + x, string[x + start].ord | attr)
    end
  else
    # Draw the message on a vertical axis
    display = [display, Ncurses.getmaxy(window) - 1].min
    (0...display).each do |x|
      Ncurses.mvwaddch(window, ypos + x, xpos, string[x + start].ord | attr)
    end
  end
end

.writeChtype(window, xpos, ypos, string, align, start, endn) ⇒ Object

This writes out a chtype string



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# File 'lib/rndk/core/draw.rb', line 188

def Draw.writeChtype (window, xpos, ypos, string, align, start, endn)
  Draw.writeChtypeAttrib(window, xpos, ypos, string, RNDK::Color[:normal],
      align, start, endn)
end

.writeChtypeAttrib(window, xpos, ypos, string, attr, align, start, endn) ⇒ Object

This writes out a chtype string with the given attributes added.



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# File 'lib/rndk/core/draw.rb', line 194

def Draw.writeChtypeAttrib(window, xpos, ypos, string, attr,
    align, start, endn)
  diff = endn - start
  display = 0
  x = 0
  if align == RNDK::HORIZONTAL
    # Draw the message on a horizontal axis.
    display = [diff, Ncurses.getmaxx(window) - xpos].min
    (0...display).each do |x|
      Ncurses.mvwaddch(window, ypos, xpos + x, string[x + start].ord | attr)
    end
  else
    # Draw the message on a vertical axis.
    display = [diff, Ncurses.getmaxy(window) - ypos].min
    (0...display).each do |x|
      Ncurses.mvwaddch(window, ypos + x, xpos, string[x + start].ord | attr)
    end
  end
end