1 # Copyright (C) 2007 by Aiwota Programmer
2 # aiwotaprog@tetteke.tk
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License as published by
6 # the Free Software Foundation; either version 2 of the License, or
7 # (at your option) any later version.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with this program; if not, write to the Free Software
16 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 class ThreadView(gtk.HBox):
27 gtk.HBox.__init__(self, False, 0)
28 self.drawingarea = gtk.DrawingArea()
29 self.vscrollbar = gtk.VScrollbar()
30 self.pack_start(self.drawingarea)
31 self.pack_start(self.vscrollbar, expand=False)
32 self.adjustment = self.vscrollbar.get_adjustment()
34 self.drawingarea.add_events(gtk.gdk.SCROLL_MASK)
36 self.adjustment.step_increment = 20
37 self.drawingarea_prev_width = 0
39 self.drawingarea.connect(
40 "expose-event", self.on_drawingarea_expose_event)
41 self.drawingarea.connect(
42 "size-allocate", self.on_drawingarea_size_allocate)
43 self.drawingarea.connect(
44 "button-press-event", self.on_drawingarea_button_press_event)
45 self.drawingarea.connect(
46 "scroll-event", self.on_drawingarea_scroll_event)
47 self.vscrollbar.connect(
48 "value-changed", self.on_vscrollbar_value_changed)
50 self.initialize_buffer()
52 def initialize_buffer(self):
55 def add_layout(self, pangolayout):
56 if (len(self.pangolayout) != 0):
57 last = self.pangolayout[len(self.pangolayout)-1]
58 x, y = last.get_pixel_size()
59 pangolayout.posY = last.posY + y
60 self.set_layout_width(pangolayout)
61 self.pangolayout.append(pangolayout)
62 x, y = pangolayout.get_pixel_size()
63 self.adjustment.upper = pangolayout.posY + y
64 self.prevent_adjustment_overflow()
67 def create_pango_layout(self, text):
68 return self.drawingarea.create_pango_layout(text)
70 def set_layout_width(self, layout):
71 width = self.drawingarea.allocation.width
72 layout.set_width((width - layout.marginleft) * pango.SCALE)
75 self.drawingarea.queue_draw()
78 width = self.drawingarea.allocation.width
80 for layout in self.pangolayout:
81 layout.set_width((width - layout.marginleft) * pango.SCALE)
82 layout.posY = sum_height
83 x, y = layout.get_pixel_size()
85 self.adjustment.upper = sum_height
86 self.prevent_adjustment_overflow()
88 def jump(self, value):
89 if value > self.adjustment.upper - self.adjustment.page_size:
90 value = self.adjustment.upper - self.adjustment.page_size
91 self.adjustment.set_value(value)
93 def jump_to_layout(self, layout):
94 self.jump(layout.posY)
96 def jump_to_the_end(self):
97 value = self.adjustment.upper - self.adjustment.page_size
98 self.adjustment.set_value(value)
100 def jump_to_res(self, resnum):
101 for layout in self.pangolayout:
102 if layout.resnum == resnum:
103 self.jump_to_layout(layout)
107 def draw_viewport(self):
108 view_y = self.adjustment.get_value()
109 self.drawingarea.window.draw_rectangle(
110 self.drawingarea.style.base_gc[0],
112 self.drawingarea.allocation.width,
113 self.drawingarea.allocation.height)
115 gc = self.drawingarea.window.new_gc()
116 for layout in self.pangolayout:
117 w, h = layout.get_pixel_size()
118 layout_top = layout.posY
119 layout_bottom = layout.posY + h
121 area_bottom = view_y + self.drawingarea.allocation.height
122 if layout_top <= area_bottom and layout_bottom >= area_top:
123 self.drawingarea.window.draw_layout(
124 gc, layout.marginleft, layout.posY - int(view_y), layout)
126 def on_drawingarea_expose_event(self, widget, event, data=None):
129 def on_drawingarea_size_allocate(self, widget, allocation, data=None):
130 if allocation.width != self.drawingarea_prev_width:
132 self.drawingarea_prev_width = allocation.width
133 self.adjustment.page_size = self.drawingarea.allocation.height
134 self.adjustment.page_increment = self.drawingarea.allocation.height
136 self.prevent_adjustment_overflow()
138 def prevent_adjustment_overflow(self):
139 if (self.adjustment.value >
140 self.adjustment.upper - self.adjustment.page_size):
141 self.adjustment.value = (self.adjustment.upper -
142 self.adjustment.page_size)
144 if self.adjustment.value < 0:
145 self.adjustment.value = 0
147 def on_drawingarea_button_press_event(self, widget, event, data=None):
148 self.drawingarea.queue_draw()
150 def on_vscrollbar_value_changed(self, widget, data=None):
151 self.drawingarea.queue_draw()
153 def on_drawingarea_scroll_event(self, widget, event, data=None):
154 if event.direction == gtk.gdk.SCROLL_UP:
155 self.adjustment.value -= 66.476200804
156 if self.adjustment.value < self.adjustment.lower:
157 self.adjustment.value = self.adjustment.lower
158 if event.direction == gtk.gdk.SCROLL_DOWN:
159 self.adjustment.value += 66.476200804
160 max_value = self.adjustment.upper - self.adjustment.page_size
161 if self.adjustment.value > max_value:
162 self.adjustment.value = max_value
163 self.prevent_adjustment_overflow()