I have a "coordinate.js" javascript in public/javascripts and in
app/views/dicoms, I have a "show.html.erb".
For example, if I want to call the getWidth function from the .js file
in the view what should I do? I remember it working for me as I get a
message box giving me the alert but don't know what went wrong.
For example, I have this functionin the .js file
function getWidth() {
var image = document.getElementById("dicom_image");
imageWidth = image.width;
return imageWidth;
alert("Image Width is " + image.width);
}
And, here is my "show.html.erb" file:
<%= javascript_include_tag "coordinate" %>
<canvas id="draw" >
</canvas>
<p id="notice"><%= notice %></p>
<p>
<b> Name </b>
<%= @dicom.name %>
</p>
<p>
<b> Image </b>
</p>
<div id="image_element" style="display: none;">
<p>
<%= image_tag @dicom.photo.url , :id => 'dicom_image' %>
</p>
</div>
<%= update_page_tag do |page|
page << "getWidth();"
end
%>
<%= update_page_tag do |page|
page << "drawImg();"
end
%>
<%= update_page_tag do |page|
page << "drawLine();"
end
%>
<%= link_to 'Edit', edit_dicom_path(@dicom) %>
<%= link_to 'Back', dicoms_path %>
Please let me know what you think.
Thanks.
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