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# -*- coding: utf-8 -*-
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from .widget import Widget
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class EditBox(Widget):
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def __init__(self, width=20, height=20, text=''):
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Widget.__init__(self, width, height)
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self.set_text(text)
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self.xofs = 0
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self.yofs = 0
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# cursor
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self.cline = 0
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self.cpos = 0
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# selection
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self.sline = 0
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self.spos = 0
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self.connect('draw', self.on_draw)
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self.connect('keypress', self.on_keypress)
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self.connect('mousewheel', self.on_mousewheel)
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self.newevent('scroll')
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self.newevent('areasize')
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def on_draw(self, screen, x, y):
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for j in range(self.height):
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if self.yofs + j >= len(self.lines):
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break
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line = self.lines[self.yofs + j]
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#if len(line) < self.width:
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#line += ' ' * (self.width - len(line))
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#else:
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#line = line[:self.width]
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screen.puts(x, y + j, line)
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screen.showcursor(x + self.get_cpos() - self.xofs, y + self.cline - self.yofs)
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def on_keypress(self, keyname, char):
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if keyname:
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if keyname == 'left':
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self.move_left()
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if keyname == 'right':
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self.move_right()
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if keyname == 'home':
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self.move_home()
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if keyname == 'end':
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self.move_end()
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if keyname == 'up':
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self.move_up()
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if keyname == 'down':
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self.move_down()
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if keyname == 'pageup':
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self.move_pageup()
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if keyname == 'pagedown':
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self.move_pagedown()
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if keyname == 'backspace':
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if self.cline > 0 or self.cpos > 0:
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self.move_left()
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self.del_char()
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if keyname == 'delete':
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self.del_char()
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if keyname == 'enter':
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self.add_newline()
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self.move_right()
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if char:
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self.add_char(char)
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self.move_right()
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self.redraw()
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def on_mousewheel(self, ev):
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# up
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if ev.button == 4:
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self.move_up()
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# down
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if ev.button == 5:
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self.move_down()
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self.redraw()
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def set_text(self, text):
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self.lines = text.split('\n')
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def get_text(self):
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return '\n'.join(self.lines)
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def get_linelen(self):
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return len(self.lines[self.cline])
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def get_cpos(self):
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if self.cpos > self.get_linelen():
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return self.get_linelen()
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return self.cpos
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def set_yofs(self, yofs):
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if yofs < 0:
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yofs = 0
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if yofs > len(self.lines) - self.height:
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yofs = len(self.lines) - self.height
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self.yofs = yofs
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self.handle('scroll')
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def move_left(self):
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if self.cpos > 0:
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self.cpos = self.get_cpos() - 1
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else:
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if self.move_up():
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self.cpos = self.get_linelen()
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def move_right(self):
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if self.cpos < self.get_linelen():
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self.cpos += 1
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else:
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if self.move_down():
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self.cpos = 0
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def move_home(self):
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self.cpos = 0
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def move_end(self):
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self.cpos = self.get_linelen()
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def move_up(self):
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if self.cline > 0:
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self.cline -= 1
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if self.cline < self.yofs:
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self.set_yofs(self.cline)
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return True
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return False
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def move_down(self):
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if self.cline < len(self.lines) - 1:
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self.cline += 1
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if self.cline > self.yofs + self.height - 1:
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self.set_yofs(self.cline - (self.height - 1))
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return True
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return False
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def move_pageup(self):
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if self.cline >= self.height - 1:
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self.cline -= self.height - 1
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self.set_yofs(self.yofs - (self.height - 1))
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else:
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self.cline = 0
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self.set_yofs(0)
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def move_pagedown(self):
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if self.cline <= len(self.lines) - (self.height - 1):
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self.cline += self.height - 1
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self.set_yofs(self.yofs + (self.height - 1))
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else:
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self.cline = len(self.lines) - 1
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self.set_yofs(self.cline)
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def add_char(self, c):
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ln = self.lines[self.cline]
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cpos = self.get_cpos()
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self.lines[self.cline] = ln[:cpos] + c + ln[cpos:]
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self.cpos = cpos
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def add_newline(self):
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ln = self.lines[self.cline]
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cpos = self.get_cpos()
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self.lines[self.cline] = ln[cpos:]
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self.lines.insert(self.cline, ln[:cpos])
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self.handle('areasize')
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def del_char(self):
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ln = self.lines[self.cline]
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cpos = self.get_cpos()
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if cpos == self.get_linelen():
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if self.cline + 1 < len(self.lines):
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self.lines[self.cline] = self.lines[self.cline] + self.lines[self.cline+1]
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del self.lines[self.cline+1]
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self.handle('areasize')
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else:
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self.lines[self.cline] = ln[:cpos] + ln[cpos+1:]
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