Control in Visual Basic .NET

Encoding QR-Code in Visual Basic .NET Control

10.1 Control
Create Denso QR Bar Code In VB.NET
Using Barcode creation for .NET Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
www.OnBarcode.com
Scan Denso QR Bar Code In VB.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Almost every element you ll deal with that accepts input in some form derives from Control. Even the pages and user controls you create in your application ultimately end up deriving from this type. It s also the lowest-level type you can typically get away with when trying to share styles (see chapter 23) between different elements. The System.Windows.Controls.Control abstract class derives from FrameworkElement. In addition to a number of protected methods that the derived controls can override to provide additional functionality, Control adds a number of new public properties and methods. We ll break these up into several logical groups and cover them separately, starting with appearance, then navigation and state, and finally the support for control templating.
Printing UPC Symbol In VB.NET
Using Barcode generator for Visual Studio .NET Control to generate, create UPCA image in VS .NET applications.
www.OnBarcode.com
Paint USS Code 39 In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create Code39 image in VS .NET applications.
www.OnBarcode.com
10.1.1 Appearance
Linear Creator In Visual Basic .NET
Using Barcode encoder for .NET framework Control to generate, create Linear 1D Barcode image in VS .NET applications.
www.OnBarcode.com
2D Barcode Encoder In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create 2D Barcode image in .NET applications.
www.OnBarcode.com
Controls are visual by definition. For that reason, several properties can be shared as a baseline implementation for anything visual and potentially interactive. The appearance-related properties for control are shown in table 10.1.
UCC.EAN - 128 Encoder In Visual Basic .NET
Using Barcode creator for VS .NET Control to generate, create GS1 128 image in .NET applications.
www.OnBarcode.com
Draw UPC E In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create Universal Product Code version E image in VS .NET applications.
www.OnBarcode.com
Table 10.1 Visual style properties for the Control abstract type Member Description The brush used to paint the background The brush used to paint the border The thickness of the border line The color used for foreground elements The amount of space to reserve between the control s exterior and interior Controls how the internal control content is aligned Controls how the internal control content is aligned
Painting QR Code In Java
Using Barcode drawer for Java Control to generate, create QR image in Java applications.
www.OnBarcode.com
Read QR-Code In Visual C#
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Background BorderBrush BorderThickness Foreground Padding HorizontalContentAlignment VerticalContentAlignment
Encoding Barcode In .NET Framework
Using Barcode generator for Reporting Service Control to generate, create Barcode image in Reporting Service applications.
www.OnBarcode.com
GTIN - 128 Generation In Objective-C
Using Barcode encoder for iPad Control to generate, create GTIN - 128 image in iPad applications.
www.OnBarcode.com
The Background property is used to hold the background brush of the control. This can be a simple color or a complex gradient. Similarly, the BorderBrush property does the same for the brush used to paint the border. The BorderThickness is a size to be
Create UCC - 12 In None
Using Barcode creator for Online Control to generate, create UPC-A Supplement 5 image in Online applications.
www.OnBarcode.com
Code 128 Code Set C Printer In Java
Using Barcode drawer for Java Control to generate, create Code 128 Code Set C image in Java applications.
www.OnBarcode.com
Download from Wow! eBook <www.wowebook.com>
Make USS Code 39 In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create Code 39 Full ASCII image in ASP.NET applications.
www.OnBarcode.com
Scan PDF-417 2d Barcode In .NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Controls and UserControls
Decode EAN13 In Visual C#.NET
Using Barcode reader for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
PDF 417 Printer In Java
Using Barcode generator for Java Control to generate, create PDF417 image in Java applications.
www.OnBarcode.com
used to control the pen weight or thickness of the border for the control. The Foreground brush should be used when displaying text or other content for which the user hasn t provided a specific color. The last three Padding, HorizontalContentAlignment, and VerticalContentAlignment all control how the content will be displayed. It s important to know that no specific user interface is implied by these properties. The control author (or person creating the style/template) is required to apply these properties to specific elements in the template. Common sense would say that a BorderBrush should control the color of the outline of the control, but nothing enforces that. Two other common traits that controls share is the ability to be navigated to via mouse and keyboard and set as either enabled or disabled.
Drawing Code 39 Extended In Java
Using Barcode printer for Java Control to generate, create Code39 image in Java applications.
www.OnBarcode.com
Make Barcode In Objective-C
Using Barcode maker for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
10.1.2 Navigation and state
Silverlight controls also support Tab-key navigation as well as manual focusing via the mouse or API. The properties and methods that support that are shown in table 10.2.
Table 10.2 Navigation and state members for the Control abstract type Description Set to True if this control is in a state where it can accept user interaction True if the user can tab into this control The tabbing position of this control, relative to its peers in the same panel Controls how the Tab key navigates in this control. It can either cycle, be local, or be a one-stop navigation. More on this shortly. Calling this method attempts to set focus to the control.
Member
IsEnabled IsTabStop TabIndex TabNavigation Focus method
IsEnabled controls the enabled state for the control. The expected behavior is that, if IsEnabled is false, the control won t accept any keyboard, mouse, or other human
input and isn t considered a tab stop. It should also display itself using a faded or grayed-out look to convey this state. The Focus method may be used to attempt to manually set focus to a control via code. If the control can t receive focus (for example, IsEnabled is False), the method will return false. Three properties control tab navigation for the control. The first IsTabStop controls whether the Tab key can be used to access the control. The TabIndex controls the order within the container that the Tab key will navigate between controls. Lower-numbered controls come earlier in the tabbing sequence. Finally, the TabNavigation property controls how tabbing works for elements hosted inside this control. The possible values and their meanings are listed in table 10.3. If you were to create a composite control, such as the LockableListBox at the end of this chapter, Local tab navigation would be the expected behavior. But, if you
Copyright © OnBarcode.com . All rights reserved.