chapter 15 wpf
DESCRIPTION
CHAPTER 15 WPF. Windows Presentation Foundation Dr. John Abraham Professor, UTPA. Windows Presentation Foundation. It is the framework for all graphics and multimedia. In the past different platforms had to be used to accomplish, video, sound, etc. - PowerPoint PPT PresentationTRANSCRIPT
CHAPTER 15 WPF
Windows Presentation Foundation
Dr. John Abraham
Professor, UTPA
Windows Presentation Foundation
• It is the framework for all graphics and multimedia.
• In the past different platforms had to be used to accomplish, video, sound, etc.
• With WPF, it can integrate other platforms into it.
• In the toolbox there is a section for WPF.
XAML (Extensible Application Markup Language)
• In WPF when GUI is added XAML markup statements are created to describe the GUI controls.
• Upon compilation the XAML compiler generates code to create and configure controls based on XAML markup.
• XAML is implemented with XML.
XML
• Standard for describing data
• Data thus described may be exchanged between different applications over the internet.
• XML describes information in such a way both humans and computers can understand.
XML - EXtensible Markup Language.
• XML was designed to describe data and to focus on what data is.– XML tags are not predefined. You must define
your own tags – XML uses a Document Type Definition (DTD) or an
XML Schema to describe the data
• HTML was designed to display data and to focus on how data looks
XML stores data, Does not display
• XML can Separate Data from HTML
• With XML, your data is stored outside your HTML.
• XML is Used to Exchange Data
• With XML, data can be exchanged between incompatible systems
• With XML, financial information can be exchanged over the Internet
An Example XML Document
<?xml version="1.0" encoding="ISO-8859-1"?> <note> <to>Tove</to> <from>Jani</from> <heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note>
Displaying XML
http://www.w3schools.com/xml/xml_display.asp
Formatting and Manipulating XML documents
XML documents contain only data
May us XSL (Extensible Stylesheet Language) to specify rendering instructions for different platforms.
XSL (Extensible Stylesheet Language)
A group of three technologiesXSL-FO (Formatting Objects)
Vocabulary for specifying formatting
XPath
for effectively locating structures and data in XML documents
XSLT (XSL Transformation)For transforming XML documents into other
documents.
XSLT
SLT is a language for transforming XML documents into XHTML documents or to other XML documents.
http://www.w3schools.com/xsl/xsl_transformation.asp
Programming using XAML
GUI programming
XAML document defines the appearance of Windows Presentation Foundation application.
XAML program 1
<Window x:Class="Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="My Hello Program" Height="300" Width="300"> <Grid Background="Gold"> <Label HorizontalAlignment="Center"
VerticalAlignment="cENTER" FontSize="25"> WELCOME TO WPF </Label> </Grid></Window>
Explanation
• Application.xaml.vb is the code behind class and handles application-level events.
2 standard namespaces must be definedPresentation XAML namespace (Microsoft
presentation site)
Standard XAML namespace (Microsoft xaml site) – this site is assigned to x
WPF Controls
• Presented by elements in XAML markup.
• The root element is a window control (this is similar to the form control in our vb programs)
