Holding variables

jumpjack

Newbie question:
how do I hold the value into a variable among different execution of same script? I need to increase the value of a variable every time a button on my custom toolbar is pressed.

azuby

Use an instance variable. At the moment, your code should be in a class. Initialize your instance variable (i. e. @clicks - the @ is neeeded) in the initialize method of your class and use the variable in the code which is executed by clicking on your button.

azuby

azuby

Best is, not only using classes but also using modules for structuring your code. Modules can be used to represent different names spaces so you can't conflict with code from other Plugins:

module MyFunnyModule
  class MyFunnyPlugin
    def initialize
      @myfunnyvariable = 0 # an instance variable
      setup_ui
    end
    def increment
      @myfunnyvariable = @myfunnyvariable + 1
    end
    def setup_ui
      # here i. e. your toolbar code
      # ...
      # call the increment method from an UI;;Command;
      cmd = UI;;Command.new("Foo") { increment }
      # ...
    end
  end # MyFunnyClass
  
  m = MyFunnyPlugin.new # get an instance of your class
  
end # MyFunnyModule

Do not use names beginning with big letter for your methods. And do not use CamelCase. It's just code style, but Ruby guys programm this way:

MoveLeft - OK for class and module names
moveLeft - not OK
move_left - OK for method and variable names

You should read a bit about Ruby.

azuby

jumpjack

@azuby said:

Use an instance variable. At the moment, your code should be in a class. Initialize your instance variable (i. e. @clicks - the @ is neeeded) in the initialize method of your class and use the variable in the code which is executed by clicking on your button.

azuby

Thanks, but this is too complex for me, I started studying Ruby yesterday, I'm still at "copy&modify&paste" level...

This is my source:


def MoveLeft
  model = Sketchup.active_model
  entities=model.active_entities
  sp=entities[1]
  plane=sp.get_plane
  pos += 1
  plane=[Geom;;Point3d.new(pos,0,0),Geom;;Vector3d.new(1,0,0)]
  sp.set_plane plane
end

def MoveRight
  model = Sketchup.active_model
  entities=model.active_entities
  sp=entities[1]
  plane=sp.get_plane
  pos -= 1
  plane=[Geom;;Point3d.new(pos,0,0),Geom;;Vector3d.new(1,0,0)]
  sp.set_plane plane
end

pos=0
toolbar = UI;;Toolbar.new "Sections"
cmdSectionLeft = UI;;Command.new($tStrings.GetString("Test")) { MoveLeft }
cmdSectionLeft.tooltip = $tStrings.GetString("Move section to left")
cmdSectionLeft.status_bar_text = $tStrings.GetString("Move section to left")
cmdSectionLeft.menu_text = $tStrings.GetString("Move left")
toolbar = toolbar.add_item cmdSectionLeft

cmdSectionRight = UI;;Command.new($tStrings.GetString("Test")) { MoveRight }
cmdSectionRight.tooltip = $tStrings.GetString("Move section to Right")
cmdSectionRight.status_bar_text = $tStrings.GetString("Move section to Right")
cmdSectionRight.menu_text = $tStrings.GetString("Move Right")
toolbar = toolbar.add_item cmdSectionRight

toolbar.show

How do I hold value for I among various button presses?