{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "[Index](Index.ipynb) - [Back](Widget%20Events.ipynb) - [Next](Custom Widget - Hello World.ipynb)" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "%%html\n", "" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "import ipywidgets as widgets\n", "from IPython.display import display" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "# Widget Styling" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## Basic styling" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "The widgets distributed with IPython can be styled by setting the following traits:\n", "\n", "- width \n", "- height \n", "- fore_color \n", "- back_color \n", "- border_color \n", "- border_width \n", "- border_style \n", "- font_style \n", "- font_weight \n", "- font_size \n", "- font_family \n", "\n", "The example below shows how a `Button` widget can be styled:" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "button = widgets.Button(\n", " description='Hello World!',\n", " width=100, # Integers are interpreted as pixel measurements.\n", " height='2em', # em is valid HTML unit of measurement.\n", " color='lime', # Colors can be set by name,\n", " background_color='#0022FF', # and also by color code.\n", " border_color='red')\n", "display(button)" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "## Parent/child relationships" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "To display widget A inside widget B, widget A must be a child of widget B. Widgets that can contain other widgets have a **`children` attribute**. This attribute can be **set via a keyword argument** in the widget's constructor **or after construction**. Calling display on an **object with children automatically displays those children**, too." ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "from IPython.display import display\n", "\n", "float_range = widgets.FloatSlider()\n", "string = widgets.Text(value='hi')\n", "container = widgets.Box(children=[float_range, string])\n", "\n", "container.border_color = 'red'\n", "container.border_style = 'dotted'\n", "container.border_width = 3\n", "display(container) # Displays the `container` and all of it's children." ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### After the parent is displayed" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "Children **can be added to parents** after the parent has been displayed. The **parent is responsible for rendering its children**." ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "container = widgets.Box()\n", "container.border_color = 'red'\n", "container.border_style = 'dotted'\n", "container.border_width = 3\n", "display(container)\n", "\n", "int_range = widgets.IntSlider()\n", "container.children=[int_range]" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "## Fancy boxes" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "If you need to display a more complicated set of widgets, there are **specialized containers** that you can use. To display **multiple sets of widgets**, you can use an **`Accordion` or a `Tab` in combination with one `Box` per set of widgets** (as seen below). The \"pages\" of these widgets are their children. To set the titles of the pages, one can **call `set_title`**." ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "### Accordion" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "name1 = widgets.Text(description='Location:')\n", "zip1 = widgets.BoundedIntText(description='Zip:', min=0, max=99999)\n", "page1 = widgets.Box(children=[name1, zip1])\n", "\n", "name2 = widgets.Text(description='Location:')\n", "zip2 = widgets.BoundedIntText(description='Zip:', min=0, max=99999)\n", "page2 = widgets.Box(children=[name2, zip2])\n", "\n", "accord = widgets.Accordion(children=[page1, page2])\n", "display(accord)\n", "\n", "accord.set_title(0, 'From')\n", "accord.set_title(1, 'To')" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "### TabWidget" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "name = widgets.Text(description='Name:')\n", "color = widgets.Dropdown(description='Color:', options=['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet'])\n", "page1 = widgets.Box(children=[name, color])\n", "\n", "age = widgets.IntSlider(description='Age:', min=0, max=120, value=50)\n", "gender = widgets.RadioButtons(description='Gender:', options=['male', 'female'])\n", "page2 = widgets.Box(children=[age, gender])\n", "\n", "tabs = widgets.Tab(children=[page1, page2])\n", "display(tabs)\n", "\n", "tabs.set_title(0, 'Name')\n", "tabs.set_title(1, 'Details')" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "# Alignment" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Most widgets have a **`description` attribute**, which allows a label for the widget to be defined.\n", "The label of the widget **has a fixed minimum width**.\n", "The text of the label is **always right aligned and the widget is left aligned**:" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "display(widgets.Text(description=\"a:\"))\n", "display(widgets.Text(description=\"aa:\"))\n", "display(widgets.Text(description=\"aaa:\"))" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "If a **label is longer** than the minimum width, the **widget is shifted to the right**:" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "display(widgets.Text(description=\"a:\"))\n", "display(widgets.Text(description=\"aa:\"))\n", "display(widgets.Text(description=\"aaa:\"))\n", "display(widgets.Text(description=\"aaaaaaaaaaaaaaaaaa:\"))" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "If a `description` is **not set** for the widget, the **label is not displayed**:" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "display(widgets.Text(description=\"a:\"))\n", "display(widgets.Text(description=\"aa:\"))\n", "display(widgets.Text(description=\"aaa:\"))\n", "display(widgets.Text())" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "## Flex boxes" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Widgets can be aligned using the `FlexBox`, `HBox`, and `VBox` widgets." ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "### Application to widgets" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Widgets display vertically by default:" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "buttons = [widgets.Button(description=str(i)) for i in range(3)]\n", "display(*buttons)" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "### Using hbox" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "To make widgets display horizontally, you need to **child them to a `HBox` widget**." ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "container = widgets.HBox(children=buttons)\n", "display(container)" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "By setting the width of the container to 100% and its `pack` to `center`, you can center the buttons." ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "container.width = '100%'\n", "container.pack = 'center'" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "## Visibility" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Sometimes it is necessary to **hide or show widgets** in place, **without having to re-display** the widget.\n", "The `visible` property of widgets can be used to hide or show **widgets that have already been displayed** (as seen below). The `visible` property can be:\n", "* `True` - the widget is displayed\n", "* `False` - the widget is hidden, and the empty space where the widget would be is collapsed\n", "* `None` - the widget is hidden, and the empty space where the widget would be is shown" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "w1 = widgets.Latex(value=\"First line\")\n", "w2 = widgets.Latex(value=\"Second line\")\n", "w3 = widgets.Latex(value=\"Third line\")\n", "display(w1, w2, w3)" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "w2.visible=None" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "w2.visible=False" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "w2.visible=True" ] }, { "cell_type": "markdown", "metadata": { "slideshow": { "slide_type": "slide" } }, "source": [ "### Another example" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "In the example below, a form is rendered, which conditionally displays widgets depending on the state of other widgets. Try toggling the student checkbox." ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": false }, "outputs": [], "source": [ "form = widgets.VBox()\n", "first = widgets.Text(description=\"First Name:\")\n", "last = widgets.Text(description=\"Last Name:\")\n", "\n", "student = widgets.Checkbox(description=\"Student:\", value=False)\n", "school_info = widgets.VBox(visible=False, children=[\n", " widgets.Text(description=\"School:\"),\n", " widgets.IntText(description=\"Grade:\", min=0, max=12)\n", " ])\n", "\n", "pet = widgets.Text(description=\"Pet's Name:\")\n", "form.children = [first, last, student, school_info, pet]\n", "display(form)\n", "\n", "def on_student_toggle(name, value):\n", " if value:\n", " school_info.visible = True\n", " else:\n", " school_info.visible = False\n", "student.on_trait_change(on_student_toggle, 'value')\n" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "[Index](Index.ipynb) - [Back](Widget%20Events.ipynb) - [Next](Custom Widget - Hello World.ipynb)" ] } ], "metadata": { "cell_tags": [ [ "", null ] ], "kernelspec": { "display_name": "Python 3", "language": "python", "name": "python3" }, "language_info": { "codemirror_mode": { "name": "ipython", "version": 3 }, "file_extension": ".py", "mimetype": "text/x-python", "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", "version": "3.4.2" } }, "nbformat": 4, "nbformat_minor": 0 }