def render(self, size, focus):
maxcols, maxrows = size
rows = self._original_widget.rows((maxcols, ), focus)
if rows <= maxrows:
# no clipping, so just fill as normal
return super().render(size, focus)
# limit scroll_top to top of last page
self.scroll_top = min(self.scroll_top, rows - maxrows)
ocanv = self._original_widget.render((maxcols, ), focus)
if ocanv.cursor is not None:
# ensure selected field is within scroll window
cx, cy = ocanv.cursor
if self.scroll_top <= cy < self.scroll_top + maxrows:
pass # already in view
elif cy < maxrows / 2:
self.scroll_top = 0
elif cy > rows - maxrows / 2:
self.scroll_top = rows - maxrows
else:
self.scroll_top = int(cy - maxrows / 2)
# calculate top / bottom values for pad_trim_top_bottom
top = -self.scroll_top
bottom = -(rows - self.scroll_top - maxrows)
canv = CompositeCanvas(ocanv)
canv.pad_trim_top_bottom(top, bottom)
if rows != 0:
# calculate top and bottom of scroll thumb as percentage of maxrows
sf = maxrows / rows
thumb_top = int(self.scroll_top * sf)
thumb_bottom = int((rows - (self.scroll_top + maxrows)) * sf)
thumb_size = maxrows - thumb_top - thumb_bottom
else:
thumb_size = maxrows
thumb_top = thumb_bottom = 0
# create canvases to draw scrollbar
scroll_top = SolidCanvas(self.trough_char, 1, thumb_top)
scroll_thumb = SolidCanvas(self.thumb_char, 1, thumb_size)
scroll_bottom = SolidCanvas(self.trough_char, 1, thumb_bottom)
scroll_bar = CanvasCombine([
(scroll_top, None, False),
(scroll_thumb, None, False),
(scroll_bottom, None, False),
])
return CanvasJoin([
(canv, None, True, maxcols - 1),
(scroll_bar, None, False, 1),
])
def render(self, size, focus=False):
"""
Render the graph
:param focus: ignored
:type size: tuple
:return:
"""
self.last_size = size
matrix = self.__get_matrix(size[0], size[1])
rows = []
for row in range(0, size[1]):
line = []
groups = ["".join(grp) for _num, grp in groupby(matrix[row])]
for chunk in groups:
color = self.colors[int(chunk[0])]
char = self.chars[int(chunk[0])]
line.append((color, len(chunk) * char))
rows.append((Text(line).render((size[0],)), None, False))
return CanvasCombine(rows)