--- /dev/null
+"""
+A text label with autoscrolling.
+"""
+
+from Widget import Widget
+from Pixmap import Pixmap, pixmap_for_text
+
+import gobject
+import pango
+import time
+
+
+
+class Label(Widget):
+
+ # text alignments
+ LEFT = 0
+ RIGHT = 1
+ CENTERED = 2
+
+ def __init__(self, text, font, color):
+
+ self.__text_pmap = None
+ self.__bg = None
+ self.__is_new_text = True
+ self.__alignment = self.LEFT
+ self.__render_timer = None
+
+ self.__text = text
+ self.__font = font
+ self.__color = color
+
+ Widget.__init__(self)
+ self.__create_text_pmap()
+
+
+ def _reload(self):
+
+ self.__is_new_text = True
+ self.__bg = None
+ #self.__create_text_pmap()
+
+
+ def set_size(self, w, h):
+
+ Widget.set_size(self, w, h)
+ self.__is_new_text = True
+ self.__bg = None
+
+
+ def __create_text_pmap(self):
+
+ if (not self.__is_new_text): return
+
+ self.__text_pmap = pixmap_for_text(self.__text or " ", self.__font)
+
+
+ def __acquire_background(self):
+
+ if (not self.__is_new_text): return
+
+ x, y = self.get_screen_pos()
+ w, h = self.get_size()
+ screen = self.get_screen()
+ text_w, text_h = self.__text_pmap.get_size()
+
+ if (w <= 0): w = text_w
+ if (h <= 0): h = text_h
+
+ self.__bg = Pixmap(None, w, text_h)
+ y += (h - text_h) / 2
+ self.__bg.copy_buffer(screen, x, y, 0, 0, w, text_h)
+
+
+ def __restore_background(self):
+
+ if (not self.__is_new_text or not self.__bg): return
+ if (not self.may_render()): return
+
+ x, y = self.get_screen_pos()
+ w, h = self.get_size()
+ screen = self.get_screen()
+ text_w, text_h = self.__text_pmap.get_size()
+
+ if (not w): w = text_w
+ if (not h): h = text_h
+
+ bg_w, bg_h = self.__bg.get_size()
+ y += (h - text_h) / 2
+ screen.copy_pixmap(self.__bg, 0, 0, x, y, bg_w, bg_h)
+
+
+ def __create_text(self):
+
+ if (not self.__is_new_text): return
+
+ x, y = self.get_screen_pos()
+ w, h = self.get_size()
+ screen = self.get_screen()
+ text_w, text_h = self.__text_pmap.get_size()
+
+ if (not w): w = text_w
+ if (not h): h = text_h
+
+ if (text_w <= w):
+ if (self.__alignment == self.LEFT): text_x = 0
+ elif (self.__alignment == self.CENTERED): text_x = (w - text_w) / 2
+ else: text_x = w - text_w
+ else:
+ text_x = 0
+
+ # tile background
+ for i in range(0, text_w, w):
+ self.__text_pmap.copy_pixmap(self.__bg, 0, 0, i - text_x, 0,
+ w, text_h)
+
+ # draw text
+ self.__text_pmap.draw_text(self.__text, self.__font, 0, 0, self.__color)
+
+
+ def set_alignment(self, alignment):
+
+ self.__alignment = alignment
+
+
+ def get_physical_size(self):
+
+ w, h = self.get_size()
+ if (self.__text_pmap):
+ text_w, text_h = self.__text_pmap.get_size()
+ if (not w): w = text_w
+ if (not h): h = text_h
+
+ return (w, h)
+
+
+ def set_text(self, text):
+
+ if (self.__text == text): return
+
+ self.__is_new_text = True
+ self.__text = text
+
+ if (self.may_render()):
+ if (self.__render_timer):
+ gobject.source_remove(self.__render_timer)
+ self.__render_text(0, 1)
+
+
+ def get_text(self):
+
+ return self.__text
+
+
+ def render_this(self):
+
+ self.__is_new_text = True
+ self.__create_text_pmap()
+ self.__acquire_background()
+ self.__create_text()
+ self.__is_new_text = False
+
+ if (self.may_render()):
+ if (self.__render_timer):
+ gobject.source_remove(self.__render_timer)
+ self.__render_text(0, 1)
+
+
+ def __render_text(self, pos, direction, begin_time = 0):
+
+ if (not self.may_render()): return
+
+ if (not begin_time): begin_time = time.time()
+
+ if (self.__is_new_text):
+ self.__restore_background()
+ self.__create_text_pmap()
+ self.__acquire_background()
+ self.__create_text()
+ self.__is_new_text = False
+ pos = 0
+ direction = 1
+ #end if
+
+ text_w, text_h = self.__text_pmap.get_size()
+ x, y = self.get_screen_pos()
+ w, h = self.get_size()
+ screen = self.get_screen()
+
+ if (not w): w = text_w
+ if (not h): h = text_h
+
+ # render currently visible text portion
+ if (text_w <= w):
+ if (self.__alignment == self.LEFT): text_x = 0
+ elif (self.__alignment == self.CENTERED): text_x = (w - text_w) / 2
+ else: text_x = w - text_w
+ else:
+ text_x = 0
+
+ if (self.may_render()):
+ text_y = (h - text_h) / 2
+ #self.use_clipping(True)
+ screen.copy_pixmap(self.__text_pmap, pos, 0, x + text_x, y + text_y,
+ min(text_w, w), text_h)
+ #self.use_clipping(False)
+
+ # handle scrolling
+ # (only scroll for 10 minutes, then stop to save battery)
+ if (text_w > w and self.may_render() and begin_time + 600 > time.time()):
+ if (pos == 0):
+ direction = 1
+ delay = 1500
+ elif (pos == text_w - w):
+ direction = -1
+ delay = 1500
+ else:
+ delay = 50
+
+ if (direction == 1):
+ pos += 1
+ else:
+ pos -= 1
+
+ self.__render_timer = \
+ gobject.timeout_add(delay, self.__render_text, pos, direction,
+ begin_time)
+
+ else:
+ self.__render_timer = None
+ #end if
+
projects / ussd-widget / blobdiff