Hi, I have stacked Bar graph which has about 20-30 items. I have to name each of these items. But there names/labels are overlapping. Is there any option to make the labels display vertical instead of horizontal? Any other ideas how can I aviod this overlapping? Please suggest. Thanks -- Posted via http://www.ruby-forum.com/.
Ruby Rails wrote:> Hi, > I have stacked Bar graph which has about 20-30 items. I have to name > each of these items. But there names/labels are overlapping. Is there > any option to make the labels display vertical instead of horizontal? > Any other ideas how can I aviod this overlapping?I had the same need and added the code pasted below to my Ruby code somewhere right after the line "require ''gruff''". The second method below makes the labels vertical, and the first method below makes the image a bit larger vertically so the labels fit. The "@d.rotation = -90" lines are the ones that did the rotating. Otherwise the function is simply copied from Gruff itself. Note that the constants in the first method are hard coded, and of course it''d be better if they dynamically stretched to fit the labels; but I didn''t see a way to measure the resulting string to do this. Also note how nice it is that Ruby lets us re-open an existing third-part class so if we need to tweak libraries like that we can do so without even modifying the original library. =============================================================================class Gruff::Base def setup_graph_measurements # TODO Separate horizontal lines from line number labels so they can be shown or hidden independently # TODO Get width of longest left-hand vertical text label and space left margin accordingly unless @hide_line_markers @graph_left = 130.0 # TODO Calculate based on string width of labels @graph_right_margin = 80.0 # TODO see previous line @graph_bottom_margin = 400.0 else @graph_left = @graph_right_margin = @graph_bottom_margin = 40 end @graph_right = @raw_columns - @graph_right_margin @graph_width = @raw_columns - @graph_left - @graph_right_margin @graph_top = 150.0 @graph_bottom = @raw_rows - @graph_bottom_margin @graph_height = @graph_bottom - @graph_top end def draw_label(x_offset, index) return if @hide_line_markers if !@labels[index].nil? && @labels_seen[index].nil? #@d.fill = @marker_color @d.font = @font if @font @d.stroke = ''transparent'' @d.rotation = 90 @d.text_align( LeftAlign) @d.font_weight = NormalWeight @d.pointsize = scale_fontsize(@marker_font_size) @d.gravity = NorthWestGravity #CenterGravity @d = @d.annotate_scaled(@base_image, 1, 1000, x_offset, @raw_rows - (@graph_bottom_margin - 30), @labels[index], @scale) @d.rotation = -90 @labels_seen[index] = 1 end end end
Hi Ron,
First of all thank you for the pointer. I changed the base.rb (I assume
even you changed the base.rb only ...right?) with the following code (as
you mentioned) and tried refreshing the graphs but the magic didn''t
happen. I assume I don''t have to do additional steps for the graphs to
take the updated base.rb. Am I missing anything?
Thanks
-------------------
def setup_graph_measurements
# TODO Separate horizontal lines from line number labels so they
can be shown or hidden independently
# TODO Get width of longest left-hand vertical text label and
space left margin accordingly
unless @hide_line_markers
@graph_left = 130.0 # TODO Calculate based on string width of
labels
@graph_right_margin = 80.0 # TODO see previous line
#@graph_bottom_margin = 80.0 #commented 7/11/06
@graph_bottom_margin = 400.0 #added 7/11/06
else
@graph_left = @graph_right_margin = @graph_bottom_margin = 40
end
@graph_right = @raw_columns - @graph_right_margin
@graph_width = @raw_columns - @graph_left - @graph_right_margin
@graph_top = 150.0
@graph_bottom = @raw_rows - @graph_bottom_margin
#setup_graph_height() #commented 7/11/06
@graph_height = @graph_bottom - @graph_top # added 7/11/06
end
---------
# Draws column labels below graph, centered over x_offset
def draw_label(x_offset, index)
return if @hide_line_markers
if !@labels[index].nil? && @labels_seen[index].nil?
#@d.fill = @marker_color #commented 7/11/06
@d.font = @font if @font
@d.stroke = ''transparent''
@d.rotation = 90 #added 7/11/06
@d.text_align( LeftAlign)
@d.font_weight = NormalWeight
@d.pointsize = scale_fontsize(@marker_font_size)
@d.gravity = NorthWestGravity #CenterGravity below changed 1 to
1000
@d = @d.annotate_scaled(@base_image,
1, 1000,
x_offset, @raw_rows -
(@graph_bottom_margin - 30),
@labels[index], @scale)
@d.rotation = -90 #added 7/11/06
@labels_seen[index] = 1
end
end
--
Posted via http://www.ruby-forum.com/.
It worked like charm! Thank you so much! -- Posted via http://www.ruby-forum.com/.
Ruby Rails wrote:> Hi Ron, > First of all thank you for the pointer. I changed the base.rb (I assume > even you changed the base.rb only ...right?)....> ... It worked like charm! Thank you so much! Actually I didn''t change the file base.rb at all. I kept the original library as it was; and in a separate file "gruff_fixes.rb" I redefined the functions I wanted to behave differently. That way other packages that expected Gruff to work as it did previously worked as expected. Only my programs that included the separate ''fixes'' .rb get the modified vertical behavior. IMHO that''s one of the coolest aspects of Ruby - that even if a program needs to make a library work differently, it can easily do so by redefining whatever parts of it it needs to.
Do you know how to modify the scale on Y-axis instead of numbers guessed for you? I wanted it in increment of 100 but could not figure out where it is doing that calculation? Thanks -- Posted via http://www.ruby-forum.com/.
Ron M wrote:> Ruby Rails wrote: >> Hi Ron, >> First of all thank you for the pointer. I changed the base.rb (I assume >> even you changed the base.rb only ...right?).... > > ... It worked like charm! Thank you so much! > > Actually I didn''t change the file base.rb at all. > > I kept the original library as it was; and in a separate > file "gruff_fixes.rb" I redefined the functions I wanted > to behave differently. That way other packages that > expected Gruff to work as it did previously worked as expected. > > Only my programs that included the separate ''fixes'' .rb > get the modified vertical behavior. > > IMHO that''s one of the coolest aspects of Ruby - that even > if a program needs to make a library work differently, it > can easily do so by redefining whatever parts of it it needs to.Hi Ron, I was trying to do the same, but the added code does not seem to have any effect on my rails project (e.g. on my view''s generated graphs)... I saved the code in a file under the ''lib'' directory: lib/gruff_fix_patch.rb Then, tried to call ''require'' it in environment.rb (below my other requires): require ''gruff'' ... require ''gruff_fix_patch'' But no luck. It would be great if you could answer this: Exactly where am I supposed to add/put the code? How do I tell other controllers/views to include that change? Thanks in advance..! -- Posted via http://www.ruby-forum.com/.