Class: MyTextEditor

Inherits:
Qt::TextEdit
  • Object
show all
Defined in:
ext/ruby/qtruby/examples/textedit/textedit.rb

Instance Method Summary collapse

Constructor Details

#initialize(w = nil) ⇒ MyTextEditor

Returns a new instance of MyTextEditor.



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 11

def initialize(w = nil)
   @images = {}
   @@next_image_id = 0
   super(w)
   self.setTextFormat(Qt::RichText)
end

Instance Method Details

#attempt_metadata_load(fname) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 52

def attempt_metadata_load(fname)
   return unless File.exists?(metadata_fname(fname))
   file = File.open(metadata_fname(fname))
   @xmldoc = REXML::Document.new file
   @xmldoc.root.elements.each("image") {
      |image|
      image_id = image.attributes["ident"]
      img_fname = image.attributes["filename"]
      load_image(img_fname, image_id)
   }
end

#createPopupMenu(pos) ⇒ Object

virtual



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 41

def createPopupMenu(pos) # virtual
   pm = Qt::PopupMenu.new
   pm.insertItem("Insert Image!", self, SLOT('insert_icon()'))
   pm
end

#has_metadata ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 46

def has_metadata
   !@images.empty?
end

#insert_icon ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 34

def insert_icon
   fname = Qt::FileDialog.getOpenFileName
   return if fname.nil?
   image_id = "image_#{next_image_id}"
   load_image(fname, image_id)
   insert_richtext('<qt><img source="'+image_id+'"></qt>')
end

#insert_richtext(richtext) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 17

def insert_richtext(richtext)
   # todo, use a rand string
   unique_string = '000___xxx123456789xxx___xxx123456789xxx___000'
   insert(unique_string)
   txt = self.text().gsub(unique_string, richtext)
   self.setText(txt)
end

#load_image(fname, image_id) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 27

def load_image(fname, image_id)
   pixmap = Qt::Pixmap.new(fname)
   msfactory = Qt::MimeSourceFactory.defaultFactory
   msfactory.setPixmap(image_id, pixmap)
   @images[image_id] = fname
   image_id
end

#metadata_clear ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 74

def metadata_clear
   @images = {}
end

#metadata_fname(fname) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 49

def metadata_fname(fname)
   "#{fname}.metadata.xml"
end

#metadata_save_if_has(fname) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 63

def metadata_save_if_has(fname)
   return if not has_metadata
   metadata_doc = REXML::Document.new '<metadata/>'
   @images.each {
      |id, img_fname|
      metadata_doc.root.add_element("image", {"filename"=>img_fname, "ident"=>id})
   }
   file = File.new(metadata_fname(fname), "w")
   file.puts(metadata_doc)
   file.close
end

#new(txt = "") ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 77

def new(txt = "")
   metadata_clear
   self.setText(txt)
end

#next_image_id ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 24

def next_image_id
   @@next_image_id += 1
end

#open ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 81

def open
   fname = Qt::FileDialog.getOpenFileName
   return if fname.nil?
   unless File.exists?(fname)
      Qt::MessageBox.critical(self, "File Does Not Exist", "Sorry, unable to find the requested file!")
      return
   end
   return if fname.nil?
   txt = File.open(fname).gets(nil)
   metadata_clear
   attempt_metadata_load(fname)
   self.setText(txt)
end

#save_as ⇒ Object 



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# File 'ext/ruby/qtruby/examples/textedit/textedit.rb', line 94

def save_as
   fname = Qt::FileDialog.getSaveFileName
   return if fname.nil?
   if File.exists?(fname)
      Qt::MessageBox.critical(self, "File Already Exists", "Sorry, file already exists. Please choose a non-existing filename!")
      return save_as
   end
   file = File.new(fname, "w")
   file.puts(text())
   file.close
   metadata_save_if_has(fname)
   emit saved()
end