Button

Replies to This Discussion

Permalink Reply by David Rutten on March 8, 2013 at 6:22am

Hi Sawsan,

this is quite difficult. If you want to change the way a component looks and responds to mouse clicks you need to override the Attributes. Problem is that component attributes are very complicated because a component is an aggregate of input and output parameters and the component itself (floating parameters by contrast are much easier to override). In fact the only overridden components in Grasshopper core are the Legend and the Gradient objects, which you'll find in the Grasshopper.Kernel.Special namespace.

Here are the steps required to do what you want:

1. Create a new class that derives from Grasshopper.Kernel.Attributes.GH_ComponentAttributes
2. Override the CreateAttributes() method on your component and assign a new instance of your attributes to the m_attributes field.
3. Override either Layout(), Render(), RespondToMouseDown(), RespondToMouseUp(), RespondToMouseDoubleClick(), RespondToMouseMove() or any combination of the above.

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by sawsan on March 8, 2013 at 7:04am

Thank you David, This is what I have done :

1:I made component that reversing a string

2:I imported a dll karamba to make a menu of two radio buttons

   

I wonder if there is another simple method to recover the value of  button (for example, if I understand how karamba  recovred the value button cheked of its menu button) .?

here is my code you can see :/

Attachments:

• MyProject1.zip, 27 KB

Permalink Reply by David Rutten on March 8, 2013 at 10:42am

Ah, so you want to add items to the component menu? I thought you wanted to add buttons to the component display on the Grasshopper canvas.

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by sawsan on March 8, 2013 at 11:23am

yes David, I want to add two radio buttons (ON / OFF)

ON to execute such program and off program will not execute.

As you can see in my code I added two buttons but when I select it does not change the program always execute. help me: (

Permalink Reply by David Rutten on March 10, 2013 at 7:07am

I can't find any buttons in your code, but since you just want to extend the component menu, you can do it as follows:

1. Declare some variables that will retain the on/off state.
2. Override the Write and Read methods of your component so this state is included in the GHX archive. Also, it allows for Undo/Redo.
   
3. Override the AppendAdditionalComponentMenuItems method and add a menu item for your custom enabled state.

private bool m_enabledState = true;

protected override void AppendAdditionalComponentMenuItems(System.Windows.Forms.ToolStripDropDown menu)
{
  base.AppendAdditionalComponentMenuItems(menu);
  Menu_AppendItem(menu, "Custom Enabled", Menu_EnabledClicked, true, m_enabledState);
}
private void Menu_EnabledClicked(object sender, EventArgs e)
{
  RecordUndoEvent("Enabled Changed");
  m_enabledState = !m_enabledState;
  ExpireSolution(true);
}

public override bool Write(GH_IO.Serialization.GH_IWriter writer)
{
  writer.SetBoolean("EnabledState", m_enabledState);
  return base.Write(writer);
}
public override bool Read(GH_IO.Serialization.GH_IReader reader)
{
  m_enabledState = true;
  reader.TryGetBoolean("EnabledState", ref m_enabledState);
  return base.Read(reader);
}

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by sawsan on March 10, 2013 at 12:56pm

thank you david for your help :) here is my code I made ​​a mistake in the project I sent in early.

thank you for checking with me what 's the fault ?? and thank you again :)

Attachments:

• MyProject4.rar, 1.8 MB

Permalink Reply by sawsan on March 12, 2013 at 6:18am

:(

Permalink Reply by David Rutten on March 12, 2013 at 9:38am

Ning doesn't accept RAR files, please re-post as a ZIP.

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by sawsan on March 13, 2013 at 4:10am

I sent a message contains the code you find here the dll karamba

Attachments:

• karamba2.dll, 1.1 MB

Permalink Reply by sawsan on March 13, 2013 at 6:19am

David what I want is that when I click  the button "on"  the program will execute when I click off it does not run.

here attached image component

Attachments:

• test1.png, 10 KB

Permalink Reply by David Rutten on March 13, 2013 at 10:19am

Ok, so you don't want stuff in a menu, you want it on the canvas all the time. This means overriding component attributes which -as mentioned- is difficult. You need to change the way the attributes are laid out. Change the way they are drawn and change the way they respond to mouse-clicks.

I attached a combination GH_Component, GH_Attributes pair that shows some very basic attributes overriding. Hopefully it can get you started.

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Attachments:

• ExampleAttributes.cs, 6 KB

Permalink Reply by Laurenz Andritz on March 19, 2013 at 5:08am

is there perhaps a possibility to add items to the component menu without heavy programming? there are several cluster-components I use over and over and I am tired to copy/paste them again and again from other definitions...

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