I'd like to instruct Prawn to truncate the contents of table cells instead of wrapping them.
I've tried setting the style as follows, but it has no effect:
options = {
cell_style: {
overflow: :truncate
},
}
pdf.table(entries, options)
If there is no direct way to specify truncation, I need a workaround recipe.
Please consider the following:
I cannot truncate the strings themselves, because the font is not fixed-width
calculating the width of each string is acceptable, but I would also need a way to retrieve the column width.
A fixed height could be used, but only if the height of the text is fixed. Only the first line of the text will be printed.
Example:
pdf.table(entries, :cell_style => {:height => 25})
Another option is to use a custom wrapper. Details are here:
https://github.com/prawnpdf/prawn/blob/master/lib/prawn/text/formatted/box.rb#L149
Example:
module MyWrap
def wrap(array)
initialize_wrap(array)
#line_wrap.wrap_line(:document => #document,
:kerning => #kerning,
:width => available_width,
:arranger => #arranger)
if enough_height_for_this_line?
move_baseline_down
print_line
end
#text = #printed_lines.join("\n")
#everything_printed = #arranger.finished?
#arranger.unconsumed
end
end
Prawn::Text::Formatted::Box.extensions << MyWrap
entries = [ ["very long text here", "another very long text here"] ]
Prawn::Document.generate("test.pdf") do
table entries, :cell_style => { :inline_format => true }
end
I just copy the original wrap method and remove the while loop in order to print only the first line of the text.
Note that :inline_format => true must be used in order to get Prawn::Text::Formatted::Box working.
http://prawn.majesticseacreature.com/docs/0.11.1/Prawn/Text/Formatted.html
That has a way to truncate text in a box with
formatted_text_box(array, options={})
But it's not a table. I don't think there is any way to do it with a table, you'll have to use textboxes.
Related
Using the CAxlsx gem (https://github.com/caxlsx/caxlsx), I'm trying to add conditional formatting to a range of cells, where the style should be applied if the cell contains the character -. Here's the snippet I'm using at the moment.
worksheet.add_conditional_formatting(range,
type: :containsText,
formula: "-",
dxfId: #styles[:invalid],
priority: 1)
Unfortunately, this doesn't seem to work. It does seem to apply the styling when the cell doesn't contain text, but a negative number, but that's not my use case. The documentation is severely lacking as well, and it doesn't offer a lot of explanation on what should be done in this case. (E.g., there's a cellIs type, with which the containsText operator can be used, but there's also a containsText type and no explanation as to what the difference between them is - and neither seem to work in my case.) Any pointers would be greatly appreciated, so far it's just been trial and error.
Assuming your range is something like "A1:A4" then formula you are looking for is NOT(ISERROR(SEARCH("-",A1))). Docs
Example:
require 'axlsx'
package = Axlsx::Package.new
workbook = package.workbook
s = workbook.styles.add_style({b:true, type: :dxf})
rows = ['a','b-c','d','e-f']
workbook.add_worksheet do |sheet|
rows.each do |row|
sheet.add_row [row]
end
sheet.add_conditional_formatting("A1:A4", { :type => :containsText,
:operator => :containsText,
:formula => 'NOT(ISERROR(SEARCH("-",A1)))',
:dxfId => s,
:priority => 1 })
end
package.serialize('conditional_test.xlsx')
I have found that the easiest way to determine the appropriate formula is to:
manually create a new excel work book
fill in an appropriate number of cells
conditionally format them in excel
save this workbook and close
change the extension to .zip (because xlsx is just zipped XML files)
open the zip file and navigate to /xl/worksheets/sheet1.xml
open this file and it will show you the formula used for the conditional formatting e.g.
<x14:conditionalFormattings>
<x14:conditionalFormatting xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main">
<x14:cfRule type="containsText" priority="1" operator="containsText" id="{E75522C8-BC6E-4142-B282-D21DF586C852}">
<xm:f>NOT(ISERROR(SEARCH("-",A1)))</xm:f>
<xm:f>"-"</xm:f>
<x14:dxf>
<font>
<color rgb="FF9C0006"/>
</font>
<fill>
<patternFill>
<bgColor rgb="FFFFC7CE"/>
</patternFill>
</fill>
</x14:dxf>
</x14:cfRule>
<xm:sqref>A1:A4</xm:sqref>
</x14:conditionalFormatting>
</x14:conditionalFormattings>
EDIT
The problem was with something else so the trouble wasn't really Qt, still I don't know why this happened.
The thing was that in the method display_filesize #yt.get_filesize(row_id, format) I used Nokogiri to parse the XML. I don't know if the XML was corrupted (it was loaded from quvi), but it was definitely the culprit. After switching to XMLSimple everything works fine.
The code I used:
def get_filesize(video_id, format)
video = #videos[video_id]
if video.formats[format].empty?
to_parse = `quvi --xml --format #{format} #{video.player_url}`
parsed = Nokogiri.parse(to_parse)
video.formats[format] = { :size => parsed.at('length_bytes').text,
:url => parsed.at('link').at('url').text }
end
video.formats[format][:size]
end
Now I use something like this:
def get_filesize(video_id, format)
video = #videos[video_id]
if video.formats[format].empty?
to_parse = `quvi --xml --format #{format} #{video.player_url}`
parsed = XmlSimple.xml_in(to_parse, {'KeyAttr' => 'name'})
video.formats[format] = { :size => parsed['link'][0]['length_bytes'][0],
:url => URI.decode(parsed['link'][0]['url'][0]) }
end
video.formats[format][:size]
end
It works beautifully. Still, I don't know why it crashed. This is the real question.
OLD QUESTION
I have a Qt::TableView that contains Qt::StandardItemModel. A row in the model consists of text, Qt::PushButton, checkbox and Qt::ComboBox. It works like this:
The user is presented with text values and can explore further if they want to.
The user clicks Qt::PushButton and the next cell is populated with a Qt::ComboBox containing other possible values to choose from.
If the user chooses an option from Qt::ComboBox, magic happens, objects get created, hashes populated and the cell on the right gets populated with appropriate text (through a Qt::StandardItem)
Then the checkbox can be checked.
After selecting the rows the user wants, a Qt::PushButton located outside of the Qt::TableView can be clicked. It then iterates through the model, tests if the checkbox is selected and should it be, tries to access the value in the appropriate ComboBox.
The problem is, when I insert code that tries to access the Qt::ComboBox, I can't insert the Qt::StandardItem, because I can't get the model, because Qt::TableView.model returns NilClass (at some point).
I don't know why and how this happens. It's a random thing, sometimes the value of Qt::ComboBox can be changed a couple times, sometimes the first try ends with an error.
Here is how I create the Qt::StandardItem:
def display_filesize
row_id = row_id_from_object_name(sender.objectName)
format = sender.currentText
filesize = #yt.get_filesize(row_id, format) # get the text
filesize_item = Qt::StandardItem.new("#{(filesize.to_i/1024/1024)} MB ")
# #tc simply stores the indexes of columns so I can access them easily
#ui.tableView.model.setItem(row_id, #tc[:filesize], filesize_item)
end
And here is how I try to access the Qt::ComboBox value:
model = #ui.tableView.model
checked = model.rowCount.times.map do |i|
if model.item(i, #tc[:check]).checkState == Qt::Checked
# if I remove the following two lines it works...
index = model.index(i, #tc[:formats])
format = #ui.tableView.indexWidget(index).currentText
#yt.videos[i][format]
end
end
And this is the error I am trying to get rid of:
searcher.rb:86:in `display_filesize': undefined method `index' for nil:NilClass (NoMethodError)
from /var/lib/gems/1.9.1/gems/qtbindings-4.8.3.0/lib/Qt/qtruby4.rb:469:in `qt_metacall'
from /var/lib/gems/1.9.1/gems/qtbindings-4.8.3.0/lib/Qt/qtruby4.rb:469:in `method_missing'
from /var/lib/gems/1.9.1/gems/qtbindings-4.8.3.0/lib/Qt/qtruby4.rb:469:in `exec'
from qutub-player.rb:17:in `<main>'
Pretty positive you have to use .clear, or maybe not as it doesn't seem to be working for me, maybe i'm just implementing it wrong I'm unsure.
Example:
browser.div(:id => "formLib1").clear.type("input", "hi")
Can anyone tell me how to simply clear a field then enter in a new string?
Assuming we are talking about a text field (ie you are not trying to clear/input a div tag), the .set() and .value= methods automatically clear the text field before inputting the value.
So one of the following would work:
browser.text_field(:id, 'yourid').set('hi')
browser.text_field(:id, 'yourid').value = 'hi'
Note that it is usually preferred to use .set since .value= does not fire events.
I had a similar issue, and, for some reason, .set() and .value= were not available/working for the element.
The element was a Watir::Input:
browser.input(:id => "formLib1").to_subtype.clear
after clearing the field I was able to enter text.
browser.input(:id => "formLib1").send_keys "hi"
I had a similar issue, and, for some reason, .set() and .value= were not available for the element.
The element was a Watir::HTMLElement:
[2] pry(#<Object>)> field.class
=> Watir::HTMLElement
field.methods.grep /^(set|clear)$/
=> []
I resorted to sending the backspace key until the value of the field was "":
count = 0
while field.value != "" && count < 50
field.send_keys(:backspace)
count += 1
end
field.send_keys "hi"
I have a Rails app that has a COUNTRIES list with full country names and abbreviations created inside the Company model. The array for the COUNTRIES list is used for a select tag on the input form to store abbreviations in the DB. See below. VALID_COUNTRIES is used for validations of abbreviations in the DB. FULL_COUNTRIES is used to display the full country name from the abbreviation.
class Company < ActiveRecord::Base
COUNTRIES = [["Afghanistan","AF"],["Aland Islands","AX"],["Albania","AL"],...]
COUNTRIES_TRANSFORM = COUNTRIES.transpose
VALID_COUNTRIES = COUNTRIES_TRANSPOSE[1]
FULL_COUNTRIES = COUNTRIES_TRANSPOSE[0]
validates :country, inclusion: { in: VALID_COUNTRIES, message: "enter a valid country" }
...
end
On the form:
<%= select_tag(:country, options_for_select(Company::COUNTRIES, 'US')) %>
And to convert back the the full country name:
full_country = FULL_COUNTRIES[VALID_COUNTRIES.index(:country)]
This seems like an excellent application for a hash, except the key/value order is wrong. For the select I need:
COUNTRIES = {"Afghanistan" => "AF", "Aland Islands" => "AX", "Albania" => "AL",...}
While to take the abbreviation from the DB and display the full country name I need:
COUNTRIES = {"AF" => "Afghanistan", "AX" => "Aland Islands", "AL" => "Albania",...}
Which is a shame, because COUNTRIES.keys or COUNTRIES.values would give me the validation list (depending on which hash layout is used).
I'm relatively new to Ruby/Rails and am looking for the more Ruby-like way to solve the problem. Here are the questions:
Does the transpose occur only once, and if so, when is it executed?
Is there a way to specify the FULL_ and VALID_ lists that do not require the transpose?
Is there a better or reasonable alternate way to do this? For instance, VALID_COUNTRIES is COUNTRIES[x][1] and FULL_COUNTRIES is COUNTRIES[x][0], but VALID_ must work with the validation.
Is there a way to make a hash work with just one hash rather then one for the select_tag and one for converting the abbreviations in the DB back to full names for display?
1) Does the transpose occur only once, and if so, when is it executed?
Yes at compile time because you are assigning to constants if you want it to be evaluated every time use a lambda
FULL_COUNTRIES = lambda { COUNTRIES_TRANSPOSE[0] }
2) Is there a way to specify the FULL_ and VALID_ lists that do not require the transpose?
Yes use a map or collect (they are the same thing)
VALID_COUNTRIES = COUNTRIES.map &:first
FULL_COUNTRIES = COUNTRIES.map &:last
3) Is there a better or reasonable alternate way to do this? For instance, VALID_COUNTRIES is COUNTRIES[x][1] and FULL_COUNTRIES is COUNTRIES[x][0], but VALID_ must work with the validation.
See Above
4) Is there a way to make the hash work?
Yes I am not sure why a hash isn't working as the rails docs say options_for_select will use hash.to_a.map &:first for the options text and hash.to_a.map &:last for the options value so the first hash you give should be working if you can clarify why it is not I can help you more.
In a ruby on rails app, I build an array of Project Names and project id values, but want to truncate the length of the names. Current code is:
names = active_projects.collect {|proj| [proj.name, proj.id]}
I have tried to add a truncate function to the block, but am getting undefined method for class error.
Thanks in advance - I just cannot wrap my head around this yet.
Assuming I understood the question properly:
max_length = 10 # this is the length after which we will truncate
names = active_projects.map { |project|
name = project.name.to_s[0..max_length] # I am calling #to_s because the question didn't specify if project.name is a String or not
name << "…" if project.name.to_s.length > max_length # add an ellipsis if we truncated the name
id = project.id
[name, id]
}
Try Following
name=[]
active_projects.collect {|proj| name << [proj.name, proj.id]}
EDITED this should be
names= active_projects.collect {|proj| [proj.name.to_s[0..10], proj.id]}
In a Rails application you can use the truncate method for this.
If your code isn't in a view then you will need to include the TextHelper module in order to make the method available:
include ActionView::Helpers::TextHelper
you can then do:
names = active_projects.collect { |proj| [truncate(proj.name), proj.id] }
The default behaviour is to truncate to 30 characters and replace the removed characters with '...' but this can be overridden as follows:
names = active_projects.collect {
# truncate to 10 characters and don't use '...' suffix
|proj| [truncate(proj.name, :length => 10, :omission => ''), proj.id]
}