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import gtk
import goocanvas
import cairo
from sugar.canvas.IconItem import IconItem
class Grid:
COLS = 80.0
ROWS = 60.0
MACRO_CELL_FACTOR = 5.0
def get_macro_rows(self):
return Grid.ROWS / Grid.MACRO_CELL_FACTOR
def get_macro_cols(self):
return Grid.COLS / Grid.MACRO_CELL_FACTOR
def macro_to_micro(self, x, y):
return [round(x * Grid.MACRO_CELL_FACTOR),
round(y * Grid.MACRO_CELL_FACTOR)]
def micro_to_macro(self, x, y):
return [round(x / Grid.MACRO_CELL_FACTOR),
round(y / Grid.MACRO_CELL_FACTOR)]
def convert_from_screen(self, x, y):
factor = Grid.COLS / gtk.gdk.screen_width()
grid_x = round(x * factor)
grid_y = round(y * factor)
return [grid_x, grid_y]
def convert_to_canvas(self, grid_x, grid_y):
scale = 1200 / Grid.COLS
return [grid_x * scale, grid_y * scale]
def set_constraints(self, component, x, y, width=-1, height=-1):
if isinstance(component, gtk.Window):
self._layout_window(component, x, y, width, height)
elif isinstance(component, goocanvas.Item):
self._layout_item(component, x, y, width, height)
elif isinstance(component, goocanvas.CanvasView):
self._layout_canvas(component, x, y, width, height)
def _layout_window(self, window, x, y, width, height):
scale = gtk.gdk.screen_width() / Grid.COLS
window.move(int(x * scale), int(y * scale))
window.resize(int(width * scale), int(height * scale))
def _layout_item(self, item, x, y, width, height):
scale = 1200 / Grid.COLS
self._allocate_item_position(item, x * scale, y * scale)
if width > 0 and height > 0:
self._allocate_item_size(item, width * scale, height * scale)
# FIXME We really need layout support in goocanvas
def _allocate_item_size(self, item, width, height):
if isinstance(item, goocanvas.Rect):
item.props.width = width - (item.props.line_width - 1) * 2
item.props.height = height - (item.props.line_width - 1) * 2
elif isinstance(item, goocanvas.Text):
item.props.width = width
elif isinstance(item, IconItem):
item.props.size = width
def _allocate_item_position(self, item, x, y):
if isinstance(item, goocanvas.Rect):
x = x + (item.props.line_width - 1)
y = y + (item.props.line_width - 1)
matrix = cairo.Matrix(1, 0, 0, 1, 0, 0)
matrix.translate(x, y)
item.set_transform(matrix)
def _layout_canvas(self, canvas, x, y, width, height):
scale = 1200 / Grid.COLS
canvas.set_bounds(x * scale, y * scale, width * scale, height * scale)
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