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@ellisonbg
Created May 20, 2014 18:11
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{
"metadata": {
"name": "",
"signature": "sha256:84c7300250d364448fdadb45622e6d0f3de5ce63e3a14f32ff83db494ef9e7ca"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"This notebook demonstrates how to create two sliders and constrain one to have a value less than or equal to the other."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from IPython.html import widgets"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 2
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Create two sliders by hande and use `on_trait_change` to register callbacks that will be called when either value is changed. These callbacks simple set the `value` of the other slider to the new value."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"s1 = widgets.FloatSliderWidget(min=0.0,max=10.0,step=0.1,value=0.0)\n",
"s2 = widgets.FloatSliderWidget(min=0.0,max=10.0,step=0.1,value=5.0)\n",
"\n",
"def s1_changed(name, new):\n",
" if new > s2.value:\n",
" s2.value = new\n",
"\n",
"def s2_changed(name, new):\n",
" if new < s1.value:\n",
" s1.value = new\n",
" \n",
"s1.on_trait_change(s1_changed, 'value')\n",
"s2.on_trait_change(s2_changed, 'value')"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 10
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"def printer(x, y):\n",
" print x, y"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 11
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"These slider instances can simply be passed to `interact`:"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"widgets.interact(printer, x=s1, y=s2);"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"3.2 6.1\n"
]
}
],
"prompt_number": 12
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
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