def _draw_labels(ctx, map_grid, map_area_width_dots, map_area_height_dots,
grid_legend_margin_dots):
"""
Draw the Grid labels at current position.
Args:
ctx (cairo.Context): The cairo context to use to draw.
map_grid (Grid): the grid objects whose labels we want to draw.
map_area_width_dots/map_area_height_dots (numbers): size of the
map (cairo units).
grid_legend_margin_dots (number): margin between border of
map and grid labels (cairo units).
"""
ctx.save()
ctx.set_source_rgba(0, 0, 0, 0.7)
step_horiz = map_area_width_dots / map_grid.horiz_count
last_horiz_portion = math.modf(map_grid.horiz_count)[0]
step_vert = map_area_height_dots / map_grid.vert_count
last_vert_portion = math.modf(map_grid.vert_count)[0]
ctx.set_font_size(min(0.75 * grid_legend_margin_dots,
0.5 * step_horiz))
ctx.set_source_rgba(0, 0, 0, 1)
for i, label in enumerate(map_grid.horizontal_labels):
x = i * step_horiz
if i < len(map_grid.horizontal_labels) - 1:
x += step_horiz / 2.0
elif last_horiz_portion >= 0.3:
x += step_horiz * last_horiz_portion / 2.0
else:
continue
if map_grid.rtl:
x = map_area_width_dots - x
# At the top clear the right corner of the horizontal label
if (i < map_grid.horiz_count - 1):
draw_utils.draw_halotext_center(ctx, label, x,
grid_legend_margin_dots / 2.0)
# At the bottom clear the left corner of the horizontal label
if (i > 0):
draw_utils.draw_halotext_center(
ctx, label, x,
map_area_height_dots - grid_legend_margin_dots / 2.0)
for i, label in enumerate(map_grid.vertical_labels):
y = i * step_vert
if i < len(map_grid.vertical_labels) - 1:
y += step_vert / 2.0
elif last_vert_portion >= 0.3:
y += step_vert * last_vert_portion / 2.0
else:
continue
# On the left clear the upper corner of the vertical label
if (i > 0):
draw_utils.draw_halotext_center(ctx, label,
grid_legend_margin_dots / 2.0,
y)
# On the right clear the bottom corner of the vertical label
if (i < map_grid.vert_count - 1):
draw_utils.draw_halotext_center(
ctx, label,
map_area_width_dots - grid_legend_margin_dots / 2.0, y)
ctx.restore()
def _draw_labels(ctx, map_grid,
map_area_width_dots, map_area_height_dots,
grid_legend_margin_dots):
"""
Draw the Grid labels at current position.
Args:
ctx (cairo.Context): The cairo context to use to draw.
map_grid (Grid): the grid objects whose labels we want to draw.
map_area_width_dots/map_area_height_dots (numbers): size of the
map (cairo units).
grid_legend_margin_dots (number): margin between border of
map and grid labels (cairo units).
"""
ctx.save()
ctx.set_source_rgba(0, 0, 0, 0.7);
step_horiz = map_area_width_dots / map_grid.horiz_count
last_horiz_portion = math.modf(map_grid.horiz_count)[0]
step_vert = map_area_height_dots / map_grid.vert_count
last_vert_portion = math.modf(map_grid.vert_count)[0]
ctx.set_font_size(min(0.75 * grid_legend_margin_dots,
0.5 * step_horiz))
ctx.set_source_rgba(0, 0, 0, 1)
# TODO labels can overlap with next page arrows,
# if they do -> hide them? or move them out of the
# grid center a bit?
for i, label in enumerate(map_grid.horizontal_labels):
x = i * step_horiz
if i < len(map_grid.horizontal_labels) - 1:
x += step_horiz/2.0
elif last_horiz_portion >= 0.3:
x += step_horiz * last_horiz_portion/2.0
else:
continue
draw_utils.draw_halotext_center(ctx, label,
x, - grid_legend_margin_dots/1.0)
draw_utils.draw_halotext_center(ctx, label,
x, map_area_height_dots +
grid_legend_margin_dots/1.0)
for i, label in enumerate(map_grid.vertical_labels):
y = i * step_vert
if i < len(map_grid.vertical_labels) - 1:
y += step_vert/2.0
elif last_vert_portion >= 0.3:
y += step_vert * last_vert_portion/2.0
else:
continue
draw_utils.draw_halotext_center(ctx, label,
-grid_legend_margin_dots, y)
draw_utils.draw_halotext_center(ctx, label,
map_area_width_dots +
grid_legend_margin_dots, y)
ctx.restore()