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# YUI Library Examples: Container Family: Simple Panel Example

# Container Family: Simple Panel Example

Use the show/hide buttons below to show and hide two simple panels. The first panel is created based on markup on the page and its `draggable` configuration is set to `true`; it can be dragged around the screen.

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Panel #1 from Markup — This Panel is Draggable
This is a Panel that was marked up in the document.
End of Panel #1

## Creating Two Simple Panels

The Panel Control is an extension of Overlay that is meant to behave similarly to an OS window. Unlike true browser popup windows, Panel Control instances are floating DHTML elements embedded directly within the page context. The Panel Control extends the functionality of Overlay, adding support for modality, drag and drop, and close/dismiss buttons. Panel includes a pre-defined stylesheet to support the default look and feel characteristics that you see on this page.

In this tutorial, we will build two Panels. One of them will be based on existing markup; the other will be created dynamically using script. We'll pass configuration properties via the constructor to specify any non-default settings we want to use in our Panel instances.

// Instantiate a Panel from markup YAHOO.example.container.panel1 = new YAHOO.widget.Panel("panel1", { width:"320px", visible:false, constraintoviewport:true } ); YAHOO.example.container.panel1.render(); // Instantiate a Panel from script YAHOO.example.container.panel2 = new YAHOO.widget.Panel("panel2", { width:"320px", visible:false, draggable:false, close:false } ); YAHOO.example.container.panel2.setHeader("Panel #2 from Script"); YAHOO.example.container.panel2.setBody("This is a dynamically generated Panel."); YAHOO.example.container.panel2.setFooter("End of Panel #2"); YAHOO.example.container.panel2.render("container");

These Panels introduce a few configuration properties. The `constraintoviewport` property, when set to true, will keep the Panel from being positioned outside of the viewport; this defends against the panel being dragged out of the viewport by the user and against the panel being moved outside the viewport by scripted changes to its x/y properties. The `draggable` property determines whether the Panel can be dragged (be sure to include the Drag and Drop Utility if you want your panel to be draggable), and the `close` property determines whether the close icon should be displayed in the header of the Panel.

The `context` property takes an array of arguments. The first argument in the array is the id of the element to which we want to anchor our Panel instance. In this case, that element is a `<div>` with an id of `ctx`. The next two arguments specify the positioning of the Panel — `tl` and `bl` mean, "Anchor my Panel's top left corner to my context element's bottom left corner." (Other possible values include "tr" and "br" for "top right" and "bottom right", respectively.)

The markup for `panel1` is in standard module format, as is required by the Module and Overlay classes on which Panel is built. We also provide buttons to allow for easy showing and hiding of both Panels:

<div> <button id="show1">Show panel1</button> <button id="hide1">Hide panel1</button> </div> <div id="panel1"> <div class="hd">Panel #1 from Markup</div> <div class="bd">This is a Panel that was marked up in the document.</div> <div class="ft">End of Panel #1</div> </div> <div> <button id="show2">Show panel2</button> <button id="hide2">Hide panel2</button> </div>

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### Container Family Examples:

- The Module Control
- Creating and Positioning an Overlay
- Simple Tooltip Example
- One Tooltip, Many Context Elements
- Simple Panel Example
- Skinning a Panel with Custom CSS: Introduction
- Skinning a Panel with Custom CSS: Advanced
- Creating a "Loading" Panel
- Creating a Resizable Panel
- Dialog Quickstart Example
- SimpleDialog Quickstart Example
- Using ContainerEffect Transitions
- Using the Overlay Manager to Manage Multiple Panels
- Implementing Container Keyboard Shortcuts with KeyListener
- Example of Color Picker Built in a Dialog via JavaScript (included with examples for Color Picker Control (beta))
- Menu Buttons (included with examples for Button Control (beta))
- Split Buttons (included with examples for Button Control (beta))
- OS-Style Programs Menu (included with examples for Menu Family)
- Application Menubar (included with examples for Menu Family)

### More Container Family Resources:

- User's Guide (external)
- API Documentation
- Cheat Sheet PDF (external)

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