incremental button ?

[kleer001]

Is there any way to create an incremental +/- button in a parameter?

Click + and the value goes up, clink - and the value goes down.

Edited March 12, 2015 by kleer001

[Skybar]

Maybe not the most elegant solution, and I don't know if it's what you had in mind.. But you could do something like this:

parmInc_dv.hipnc

Edited March 12, 2015 by Skybar

[ayidi]

Solution 1 (hack)

 

- Create the buttons in the Edit Parameter Interface.

- Use the Callback Script to update the value your parameter.

- You can put the code in the small box but the gui removes newlines!   

- So if writing python add semi-colons (hack)

parm = hou.parm('tx');
increment = parm.evalAsFloat() + 1;
parm.set(increment)

Solution 2

 

Proper way is to create a new custom operator that way it's more reusable.

 

Option 1:

Reference a function from HDA Module. Write the function inside Scripts (Event Handler: Python Module) and then call it in the callback:

kwargs['node'].hdaModule().onButtonPress()

 

Option 2:

 

- Add a script file reference it with opdef:

- Not worth the hazzle. Just do option 1.

 

Solution 3 (hack)

 

Use a script to insert the code bypassing the gui.

http://forums.odforce.net/topic/9607-buttons-callback-script/?p=63084

[ayidi]

I've update skybar example to include solution 1 above: parmInc_dv2.hipnc

 

 

[magneto]

It's slightly unrelated but can you get the currently edited parameter in Python and then modify it? That would allow you to increment values using hotkeys. I assume this can't be done.

[ayidi]

It's slightly unrelated but can you get the currently edited parameter in Python and then modify it? That would allow you to increment values using hotkeys. I assume this can't be done.

 

You can but the hotkey can't be just `+`  or `-` 

 

Using PARMmenu.xml create a new entry with a script to increment the param value and assign it a hotkey.

Edited March 13, 2015 by ayidi

[magneto]

Thanks so just to be sure, I will for example select a node, click inside a parameter field like Scale, and then press the hotkey I assigned and it will operate on the active field, i.e. to set it to a fixed value, double it, etc? Not by right clicking the menu item?

 

If so, I will get to it right away

[ayidi]

select a node, click inside a parameter field like Scale, and then press the hotkey I assigned and it will operate on the active field, i.e. to set it to a fixed value, double it, etc

 

That's correct.

[magneto]

Ok I checked that file and it seems logical but I don't know where my script will reside and how I will link it to the menu? If I understand it correctly, the name of my shelf button (not label) for example will be the id name I will use in the menu file?

[ayidi]

Ok I checked that file and it seems logical but I don't know where my script will reside and how I will link it to the menu? If I understand it correctly, the name of my shelf button (not label) for example will be the id name I will use in the menu file?

 

You stole the thread.

 

Create a file named PARMmenu.xml with the following and place it in your Houdini preference folder or next to your .hip file.

<?xml version="1.0" encoding="UTF-8"?>
<menuDocument>
    <menu>
        <addScriptItem id="parm_increment">
            <label>Increment</label>
            <parent>root_menu</parent>
            <insertBefore>copy_parm</insertBefore>
            <scriptCode><![CDATA[# Increment Script
for parm in kwargs['parms']:
    parmType = parm.parmTemplate().type()
    if parmType == hou.parmTemplateType.Int:
        parm.set(parm.evalAsInt() + 1)
    elif parmType == hou.parmTemplateType.Float:
        parm.set(parm.evalAsFloat() + 1)
]]></scriptCode>
        </addScriptItem>
        <addScriptItem id="parm_decrement">
            <label>Decrement</label>
            <parent>root_menu</parent>
            <insertBefore>copy_parm</insertBefore>
            <scriptCode><![CDATA[# Decrement Script
for parm in kwargs['parms']:
    parmType = parm.parmTemplate().type()
    if parmType == hou.parmTemplateType.Int:
        parm.set(parm.evalAsInt() - 1)
    elif parmType == hou.parmTemplateType.Float:
        parm.set(parm.evalAsFloat() - 1)
]]></scriptCode>
        </addScriptItem>
    </menu>
</menuDocument>

Edited March 13, 2015 by ayidi

[magneto]

Thanks a lot man, it works. I am sure kleer will be interested in this trick as well

 

When I try to assign it a hotkey though, Houdini doesn't let me. This is what I see, but I can't click the Assigned Keys section as there is nothing selected in the middle section of that dialog.

 

[ayidi]

Remove the "h." so its id="parm_decrement"

[magneto]

Does anyone know how to hide a particular menu item? I tried using expression tag but it doesn't work. I used this:

 

            <expression>return False</expression>

Is there a different way to do this?