Started work on NPC dialogues

[butaba-adventures.git] / utility.py

diff --git a/utility.py b/utility.py
index 05faab5..93dac19 100644 (file)
--- a/utility.py
+++ b/utility.py
@@ -2,6 +2,67 @@
 import pygame
 import sys
 import os.path
+import xml.etree.cElementTree as ET
+import textwrap
+
+# function to run through an interactive dialogue and return the response ID
+def dialogue_play (screen, bgscreen, npc, responder,
+                                       marginleft=0, margintop=0, marginright=0, marginbottom=0):
+
+       # first check if NPC has a dialogue at all
+       if len (npc.dialogues) == 0 or npc.currentdialog >= len (npc.dialogues):
+               return None
+
+       # get the conversation as a dictionary
+       convtree = xml_to_dict (npc.dialogues[npc.currentdialog])
+
+       scrwidth = screen.get_width ()
+       scrheight = screen.get_height ()
+       bgwidth = bgscreen.get_width ()
+       bgheight = bgscreen.get_height ()
+       leftedge = scrwidth/2 - bgwidth/2
+       topedge = scrheight/2 - bgheight/2
+
+       # now initiate the conversation
+       dlg_id = "1"
+       while 1:
+               screen.blit (bgscreen, (leftedge, topedge))
+               if npc.portrait is not None:
+                       screen.blit (npc.portrait, (leftedge, topedge))
+
+               # get the lines to display wrapped using textwrap module
+               lines = []
+               textnpc = textwrap.wrap (convtree[dlg_id][0], 40)
+               for text in textnpc:
+                       lines.append ((10, 0, 0, 0, text))
+
+               put_lines (screen, lines,
+                                               pygame.Rect(leftedge+marginleft, topedge+margintop,
+                                                       bgwidth-marginleft-marginright, bgheight-margintop-marginbottom))
+               pygame.display.update ()
+
+               for event in pygame.event.get ():
+                       if event.type == pygame.QUIT:
+                               sys.exit (0)
+
+# function to parse a conversation XML into a python dictionary
+def xml_to_dict (file):
+       # parse the dialogue XML file
+       dlgtree = ET.parse (file)
+       # get the root element
+       conversation = dlgtree.getroot ()
+
+       # build the conversation tree as a dictionary
+       convtree = dict ()
+       for dlg in conversation.findall ("dialogue"):
+               id = dlg.get ("id")
+               convtree[id] = []
+               convtree[id].append (dlg.find ("speech").text)
+               for resp in dlg.findall ("response"):
+                       convtree[id].append ((resp.text, resp.get ("id"), resp.get ("nextdialogue")))
+
+       return convtree
+
 
 # function to draw text on surface
 def put_text (surface,  x, y, size, (r,g,b), text):
@@ -9,8 +70,9 @@ def put_text (surface,  x, y, size, (r,g,b), text):
        textsurf = pygame.font.Font (harisfont, size).render (text, True, pygame.Color (r,g,b))
        surface.blit (textsurf, (x, y))
 
-# function to draw several lines of text, centered horizontally and vertically on surface
-def put_lines (surface, text_lines):
+# function to draw several lines of text, centered horizontally and vertically on screen
+# or drawn centered on a rectangle
+def put_lines (surface, text_lines, rect=None):
        textsurfs = []
        height = 0
        harisfont = os.path.join ("font", "harisgamefont.ttf")
@@ -21,12 +83,23 @@ def put_lines (surface, text_lines):
                height = height + s.get_height()*1.5
                textsurfs.append (s)
 
-       scrwidth = surface.get_width ()
-       scrheight = surface.get_height ()
        i = 0
-       for s in textsurfs:
-               surface.blit (s, (scrwidth/2 - s.get_width()/2, scrheight/2 - height/2+ i* (s.get_height()*1.5)))
-               i += 1
+       # if no rectangle specified, center in screen
+       if rect is None:
+               scrwidth = surface.get_width ()
+               scrheight = surface.get_height ()
+
+               for s in textsurfs:
+                       surface.blit (s, (scrwidth/2 - s.get_width()/2, scrheight/2 - height/2+ i* (s.get_height()*1.5)))
+                       i += 1
+       # center on specified rectangular region
+       else:
+               midx = (rect.left + rect.right)/2
+               midy = (rect.top + rect.bottom)/2
+               num = len (textsurfs) / 2
+               for s in textsurfs:
+                       surface.blit (s, (midx - s.get_width()/2, midy - (num-i) * s.get_height() * 3/2))
+                       i += 1
 
 # function to ask a question and return answer
 def ask_question (surface, question, answers, bgscreen):
@@ -48,7 +121,9 @@ def ask_question (surface, question, answers, bgscreen):
 
                surface.blit (bgscreen, (surface.get_width()/2 - bgscreen.get_width()/2,
                                                                        surface.get_height()/2 - bgscreen.get_height()/2))
-               put_lines (surface, textarray)
+               put_lines (surface, textarray, pygame.Rect (surface.get_width()/2 - bgscreen.get_width()/2,
+                                                                                               surface.get_height()/2 - bgscreen.get_height()/2,
+                                                                                               bgscreen.get_width(), bgscreen.get_height()))
 
                pygame.display.update ()