src/FukuiNoNamari/thread_view.py

   1 # Copyright (C) 2007 by Aiwota Programmer
   2 # aiwotaprog@tetteke.tk
   3 #
   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.
   8 #
   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.
  13 #
  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
  17
  18 import pygtk
  19 pygtk.require('2.0')
  20 import gtk
  21 import pango
  22
  23
  24 class ThreadView(gtk.HBox):
  25     hand_cursor = gtk.gdk.Cursor(gtk.gdk.HAND2)
  26     regular_cursor = gtk.gdk.Cursor(gtk.gdk.XTERM)
  27     arrow_cursor = gtk.gdk.Cursor(gtk.gdk.LEFT_PTR)
  28
  29     def __init__(self):
  30         gtk.HBox.__init__(self, False, 0)
  31         self.drawingarea = gtk.DrawingArea()
  32         self.vscrollbar = gtk.VScrollbar()
  33         self.pack_start(self.drawingarea)
  34         self.pack_start(self.vscrollbar, expand=False)
  35         self.adjustment  = self.vscrollbar.get_adjustment()
  36
  37         self.drawingarea.add_events(
  38             gtk.gdk.SCROLL_MASK |
  39             gtk.gdk.POINTER_MOTION_MASK |
  40             gtk.gdk.BUTTON_PRESS_MASK |
  41             gtk.gdk.BUTTON_RELEASE_MASK)
  42
  43         self.drawingarea_prev_width = 0
  44
  45         self.drawingarea.connect(
  46             "expose-event", self.on_drawingarea_expose_event)
  47         self.drawingarea.connect(
  48             "configure-event", self.on_drawingarea_configure_event)
  49         self.drawingarea.connect(
  50             "scroll-event", self.on_drawingarea_scroll_event)
  51         self.drawingarea.connect(
  52             "motion-notify-event", self.on_drawingrarea_motion_notify_event)
  53         self.drawingarea.connect(
  54             "button-press-event", self.on_drawingarea_button_press_event)
  55         self.drawingarea.connect(
  56             "button-release-event", self.on_drawingarea_button_release_event)
  57         self.vscrollbar.connect(
  58             "value-changed", self.on_vscrollbar_value_changed)
  59
  60         self.initialize_buffer()
  61
  62         self.on_uri_clicked = self._on_uri_clicked
  63
  64         self.button1_pressed = False
  65         self.current_pressed_uri = None
  66
  67         self.popupmenu = None
  68         self.menu_openuri = None
  69         self.menu_copylinkaddress = None
  70         self.menu_separator_link = None
  71         self.menu_copyselection = None
  72         self.menu_openasuri = None
  73         self.menu_separator_selection = None
  74
  75         self.menud_uri = None
  76
  77     def _on_uri_clicked(self, uri):
  78         print uri, "clicked!!!!"
  79
  80     def initialize_buffer(self):
  81         self.pangolayout = []
  82
  83     def add_layout(self, pangolayout):
  84         if (len(self.pangolayout) != 0):
  85             last = self.pangolayout[len(self.pangolayout)-1]
  86             x, y = last.get_pixel_size()
  87             pangolayout.posY = last.posY + y
  88         self.set_layout_width(pangolayout)
  89         self.pangolayout.append(pangolayout)
  90         x, y = pangolayout.get_pixel_size()
  91         self.vscrollbar.set_range(0, pangolayout.posY + y)
  92         self.redraw()
  93         self.change_vscrollbar_visible()
  94
  95     def create_pango_layout(self, text):
  96         return self.drawingarea.create_pango_layout(text)
  97
  98     def set_layout_width(self, layout):
  99         width = self.drawingarea.allocation.width
 100         layout.set_width((width - layout.marginleft) * pango.SCALE)
 101
 102     def redraw(self):
 103         self.drawingarea.queue_draw()
 104
 105     def relayout(self):
 106         width = self.drawingarea.allocation.width
 107         sum_height = 0
 108         for layout in self.pangolayout:
 109             layout.set_width((width - layout.marginleft) * pango.SCALE)
 110             layout.posY = sum_height
 111             x, y = layout.get_pixel_size()
 112             sum_height += y
 113         self.vscrollbar.set_range(0, sum_height)
 114         self.change_vscrollbar_visible()
 115
 116     def change_vscrollbar_visible(self):
 117         if self.adjustment.upper < self.adjustment.page_size:
 118             self.vscrollbar.hide()
 119         else:
 120             self.vscrollbar.show()
 121
 122     def jump(self, value):
 123         self.vscrollbar.set_value(value)
 124
 125     def jump_to_layout(self, layout):
 126         self.jump(layout.posY)
 127
 128     def jump_to_the_end(self):
 129         value = self.adjustment.upper - self.adjustment.page_size
 130         self.vscrollbar.set_value(value)
 131
 132     def jump_to_res(self, resnum):
 133         for layout in self.pangolayout:
 134             if layout.resnum == resnum:
 135                 self.jump_to_layout(layout)
 136                 return True
 137         return False
 138
 139     def draw_viewport(self):
 140         view_y = self.vscrollbar.get_value()
 141         self.drawingarea.window.draw_rectangle(
 142             self.drawingarea.style.base_gc[0],
 143             True, 0, 0,
 144             self.drawingarea.allocation.width,
 145             self.drawingarea.allocation.height)
 146
 147         gc = self.drawingarea.window.new_gc()
 148         for layout in self.pangolayout:
 149             w, h = layout.get_pixel_size()
 150             layout_top = layout.posY
 151             layout_bottom = layout.posY + h
 152             area_top = view_y
 153             area_bottom = view_y + self.drawingarea.allocation.height
 154             if layout_top <= area_bottom and layout_bottom >= area_top:
 155                 self.drawingarea.window.draw_layout(
 156                     gc, layout.marginleft, layout.posY - int(view_y), layout)
 157
 158     def transform_coordinate_gdk_to_adj(self, y):
 159         return y + self.vscrollbar.get_value()
 160
 161     def transform_coordinate_adj_to_layout(self, x, y, layout):
 162         return x - layout.marginleft, y - layout.posY
 163
 164     def transform_coordinate_gdk_to_layout(self, x, y, layout):
 165         return self.transform_coordinate_adj_to_layout(
 166             x, self.transform_coordinate_gdk_to_adj(y), layout)
 167
 168     def ptrpos_to_layout(self, x, y):
 169         # transform coordinate, GdkWindow -> adjustment
 170         adj_x = x
 171         adj_y = self.transform_coordinate_gdk_to_adj(y)
 172         for lay in self.pangolayout:
 173             width, height = lay.get_pixel_size()
 174             if (adj_y >= lay.posY and adj_y < lay.posY + height and
 175                 adj_x >= lay.marginleft):
 176                 return lay
 177         return None
 178
 179     def ptrpos_to_uri(self,  x, y):
 180         # x, y is GdkWindow coordinate
 181
 182         layout = self.ptrpos_to_layout(x, y)
 183
 184         if layout is None:
 185             return None, None, None
 186
 187         # transform coordinate, GdkWindow -> pangolayout
 188         lay_x, lay_y = self.transform_coordinate_gdk_to_layout(x, y, layout)
 189
 190         # xy -> index
 191         idx, clk = layout.xy_to_index(
 192             int(lay_x)*pango.SCALE, int(lay_y)*pango.SCALE)
 193
 194         x, y, width, height = layout.index_to_pos(idx)
 195         x /= pango.SCALE
 196         y /= pango.SCALE
 197         width /= pango.SCALE
 198         height /= pango.SCALE
 199         if (lay_x >= x and lay_x < x + width and
 200             lay_y >= y and lay_y < y + height):
 201
 202             for i, (start, end, href) in enumerate(layout.urilist):
 203                 if idx >= start and idx < end:
 204                     return href, layout, i
 205
 206         return None, layout, None
 207
 208     def on_drawingarea_expose_event(self, widget, event, data=None):
 209         self.draw_viewport()
 210
 211     def on_drawingarea_configure_event(self, widget, event, data=None):
 212         if event.width != self.drawingarea_prev_width:
 213             self.relayout()
 214             self.drawingarea_prev_width = event.width
 215         self.adjustment.page_size = self.drawingarea.allocation.height
 216         self.vscrollbar.set_increments(20, self.drawingarea.allocation.height)
 217
 218         # re-set 'value' for prevent overflow
 219         self.vscrollbar.set_value(self.vscrollbar.get_value())
 220         self.change_vscrollbar_visible()
 221
 222     def on_vscrollbar_value_changed(self, widget, data=None):
 223         self.drawingarea.queue_draw()
 224
 225     def on_drawingarea_scroll_event(self, widget, event, data=None):
 226         self.vscrollbar.emit("scroll-event", event)
 227
 228     def on_drawingrarea_motion_notify_event(self, widget, event, data=None):
 229         if event.state & gtk.gdk.BUTTON1_MASK != gtk.gdk.BUTTON1_MASK:
 230             self.button1_pressed = False
 231
 232         cursor = ThreadView.regular_cursor
 233
 234         uri, layout, index = self.ptrpos_to_uri(event.x, event.y)
 235         if layout is None:
 236             cursor = ThreadView.arrow_cursor
 237         else:
 238             if uri is not None and uri != "":
 239                 cursor = ThreadView.hand_cursor
 240
 241         self.drawingarea.window.set_cursor(cursor)
 242
 243     def on_drawingarea_button_press_event(self, widget, event, data=None):
 244         if event.button == 1:
 245             self.current_pressed_uri = None
 246             self.button1_pressed = True
 247             uri, layout, index = self.ptrpos_to_uri(event.x, event.y)
 248             if uri is not None and layout is not None and index is not None:
 249                 self.current_pressed_uri = (uri, layout, index)
 250         elif event.button == 3:
 251             time = event.time
 252             uri, layout, index = self.ptrpos_to_uri(event.x, event.y)
 253             if uri is not None and layout is not None and index is not None:
 254                 self.menu_openuri.show()
 255                 self.menu_copylinkaddress.show()
 256                 self.menu_separator_link.show()
 257                 self.menu_openuri.uri = uri
 258                 self.menu_copylinkaddress.uri = uri
 259             else:
 260                 self.menu_openuri.hide()
 261                 self.menu_copylinkaddress.hide()
 262                 self.menu_separator_link.hide()
 263                 self.menu_openuri.uri = None
 264                 self.menu_copylinkaddress.uri = None
 265
 266             self.menu_copyselection.hide()
 267             self.menu_openasuri.hide()
 268             self.menu_separator_selection.hide()
 269
 270             self.popupmenu.popup(None, None, None, event.button, time)
 271             return True
 272
 273
 274     def on_drawingarea_button_release_event(self, widget, event, data=None):
 275         if event.button == 1:
 276             button1_pressed = self.button1_pressed
 277             self.button1_pressed = False
 278
 279             if button1_pressed and self.current_pressed_uri is not None:
 280                 uri, layout, index = self.ptrpos_to_uri(event.x, event.y)
 281                 p_uri, p_layout, p_index = self.current_pressed_uri
 282                 self.current_preesed_uri = None
 283                 if uri == p_uri and layout == p_layout and index == p_index:
 284                     self.on_uri_clicked(uri)