Lab 6 Slides

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Lab 6 Slides
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In this lab

• Context Menu
• Tool Bar
• Progress bar
• Status bar
• LinkLabel

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1. Context Menu

• A ContextMenu is a shortcut menu, which you can
  used to give context-specific menu options of a
  specified object item to the user.
• You can write the code to display the shortcut
  menu, whenever the user right-click on the
  specified control such as textbox, listbox, etc.

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• Set the ContextMenu property the Form to
  ContextMenu1.
• Set the ContextMenu property the Label
  ContextMenu2.

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Multiple Controls Sharing a Single Context Menu
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• Note
• SourceControl the control that was
  right-clicked.
• Sender the context menu item that was chosen.

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2- ToolBars

• ToolStrips work by adding buttons and images to
  them. The button is then clicked, and an action
  performed.
• To add a toolbar to the top of your form, locate
  the ToolStrip control

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ToolBars

• Double click the ToolStrip control, and it will
  be added to the top of your form

• You should also notice the ToolStrip object
  appear at the bottom of the window

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• Click on your ToolStrip to select it. In the
  property box for the ToolStrip, locate the Items
  (Collection) property

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• To add a new button to your ToolStrip, click the
  Add button at the top. The button appears in the
  Members box (ToolStripButton1)

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• Notice that the new button has its own list of
  properties, just to the right.
• To add an image to this new button, locate the
  Image property

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• Click OK when you have imported the image.
• You will be returned to the Item Collection
  Editor.
• Click OK on this, as well.
• The ToolStrip on your form will then look like
  this
• Repeat the steps outlined above, and add some
  more buttons to your ToolStrip. It should then
  look something like this

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• Of course, if you click on the buttons nothing
  will happen. We need to write the code that gets
  them to work.
• Return to the Design environment. Double click
  your first ToolStripbutton to bring up the coding
  window. It should look like this

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3- Progress bar

• Progress bars are used to display the progress of
  your application or background tasks.
• There are three members of the ProgressBar
  control you should know about
• the Maximum,
• the Minimum, and
• the Value properties.

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4- Status Bar

• Status Bars are used to display status messages
  at the bottom of the form. They are generally
  used to provide additional information, such as
  page numbers, display a message, etc.

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   5- LinkLabels

• LinkLabel
• Displays links to other resources
• Files
• Web pages
• Behavior similar to web page hyperlink
• Can change color
• New
• Previously visited

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   LinkLabels
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   LinkLabels
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• 1 ' Fig. 13.8 LinkLabelTest.vb
• ' Using LinkLabels to create hyperlinks to C\
  drive, www.deitel.com and Notepad
• 3 Public Class FrmLinkLabel
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• 5 ' browse C\ drive
• 6 Private Sub lnklblCDrive_LinkClicked( _
• 7 ByVal sender As System.Object, ByVal e
  As _
• 8 System.Windows.Forms.LinkLabelLinkClicke
  dEventArgs) _
• 9 Handles lnklblCDrive.LinkClicked
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• 11 lnklblCDrive.LinkVisited True
• 12 System.Diagnostics.Process.Start("C\")
  
• 13 End Sub ' lnklblCDrive
• 14
• 15 ' load www.deitel.com in Web browser
• 16 Private Sub lnklblDeitel_LinkClicked( _
• 17 ByVal sender As System.Object, ByVal e
  As _
• 18 System.Windows.Forms.LinkLabelLinkClick
  edEventArgs) _
• 19 Handles lnklblDeitel.LinkClicked

Event handlers call method Startallowing
execution of other programsfrom our application
Method Start can take as arguments either the
file to open (a String) or the application to run
and its command-line arguments (two Strings).
In this event handler method Starttakes two
arguments
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• 25 ' run application Notepad
• 26 Private Sub lnklblNotepad_LinkClicked( _
• 27 ByVal sender As System.Object, ByVal e
  As _
• 28 System.Windows.Forms.LinkLabelLinkClick
  edEventArgs) _
• 29 Handles lnklblNotepad.LinkClicked
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• 31 lnklblNotepad.LinkVisited True
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• 33 ' run notepad application
• 34 ' full path not needed
• 35 System.Diagnostics.Process.Start("notep
  ad")
• 36 End Sub ' lnklblNotepad_LinkClicked
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• 38 End Class ' LinkLabelList

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   LinkLabels
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   LinkLabels
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   LinkLabels