Timer Tick event

[soccsupport]

I am trying to do what I thought was simple "label" visible / not visbile (blinking) event with a timer. I have the time interval set to 1000. I triger the timer on with a checkbox. When I click the checkbox the label appears and that's all that happens. I was under the assumption the timer_tick event cylces through the code. Is this thinking wrong?

PowerShell Code

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$timer1_Tick={
		
If ($labelWTF.Visible = "false")
 {$labelWTF.Visible = "true"}
else 
 {$labelWTF.Visible = "false"}
}

[jvierra]

Try it like thsi:

PowerShell Code

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$timer1_Tick={$labelWTF.Visible=(-not $labelWTF.Visible})

[soccsupport]

OK at first this did not work but I was not paying attention to how I put in the block of code. So, it's working! Thank you.

So with that said, I don't understand the logic of the code. I want to understand why this works. What can Google to reference this for learning purposes. Once again, thank you.

PowerShell Code

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$timer1_Tick={$labelWTF.Visible=(-not $labelWTF.Visible)}

[jvierra]

Did you remember to start the timer?

Did you create the event with the GUI? Did the GUI create a different event name then the default?

[soccsupport]

Jvierra,

See my updated post above.

[jvierra]

Here is a working sample. The timer is started when the form is created.

The relevant timer creation ccode is:
$timer1_Tick={
#TODO: Place custom script here
$label1.Visible=-not $label1.Visible
}


# timer1
#
$timer1.Enabled = $True
$timer1.Interval = 1000
$timer1.add_Tick($timer1_Tick)

PowerShell Code

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#=============================================
# Code Generated By: SAPIEN Technologies, Inc., PowerShell Studio 2012 v3.1.17
# Generated On: 4/24/2013 10:03 AM
#========================================================================

#----------------------------------------------
# Generated Form Function
#----------------------------------------------
function Call-Demo-TImerTick_pff {

	#----------------------------------------------
	#region Import the Assemblies
	#----------------------------------------------
	[void][reflection.assembly]::Load("mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")
	[void][reflection.assembly]::Load("System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")
	[void][reflection.assembly]::Load("System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")
	[void][reflection.assembly]::Load("System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")
	[void][reflection.assembly]::Load("System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")
	[void][reflection.assembly]::Load("System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")
	[void][reflection.assembly]::Load("System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")
	[void][reflection.assembly]::Load("System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")
	[void][reflection.assembly]::Load("Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")
	#endregion Import Assemblies

	#----------------------------------------------
	#region Generated Form Objects
	#----------------------------------------------
	[System.Windows.Forms.Application]::EnableVisualStyles()
	$form1 = New-Object 'System.Windows.Forms.Form'
	$label1 = New-Object 'System.Windows.Forms.Label'
	$buttonOK = New-Object 'System.Windows.Forms.Button'
	$timer1 = New-Object 'System.Windows.Forms.Timer'
	$InitialFormWindowState = New-Object 'System.Windows.Forms.FormWindowState'
	#endregion Generated Form Objects

	#----------------------------------------------
	# User Generated Script
	#----------------------------------------------
	
	
	
	
	
	
	
	$FormEvent_Load={
		#TODO: Initialize Form Controls here
		
	}
	
	$timer1_Tick={
		#TODO: Place custom script here
		$label1.Visible=-not $label1.Visible
	}
	
	# --End User Generated Script--
	#----------------------------------------------
	#region Generated Events
	#----------------------------------------------
	
	$Form_StateCorrection_Load=
	{
		#Correct the initial state of the form to prevent the .Net maximized form issue
		$form1.WindowState = $InitialFormWindowState
	}
	
	$Form_Cleanup_FormClosed=
	{
		#Remove all event handlers from the controls
		try
		{
			$form1.remove_Load($FormEvent_Load)
			$timer1.remove_Tick($timer1_Tick)
			$form1.remove_Load($Form_StateCorrection_Load)
			$form1.remove_FormClosed($Form_Cleanup_FormClosed)
		}
		catch [Exception]
		{ }
	}
	#endregion Generated Events

	#----------------------------------------------
	#region Generated Form Code
	#----------------------------------------------
	#
	# form1
	#
	$form1.Controls.Add($label1)
	$form1.Controls.Add($buttonOK)
	$form1.AcceptButton = $buttonOK
	$form1.ClientSize = '284, 262'
	$form1.FormBorderStyle = 'FixedDialog'
	$form1.MaximizeBox = $False
	$form1.MinimizeBox = $False
	$form1.Name = "form1"
	$form1.StartPosition = 'CenterScreen'
	$form1.Text = "Form"
	$form1.add_Load($FormEvent_Load)
	#
	# label1
	#
	$label1.Font = "Microsoft Sans Serif, 12pt, style=Bold"
	$label1.Location = '70, 63'
	$label1.Name = "label1"
	$label1.Size = '153, 23'
	$label1.TabIndex = 1
	$label1.Text = "Timer is ticking..."
	#
	# buttonOK
	#
	$buttonOK.Anchor = 'Bottom, Right'
	$buttonOK.DialogResult = 'OK'
	$buttonOK.Location = '197, 227'
	$buttonOK.Name = "buttonOK"
	$buttonOK.Size = '75, 23'
	$buttonOK.TabIndex = 0
	$buttonOK.Text = "OK"
	$buttonOK.UseVisualStyleBackColor = $True
	#
	# timer1
	#
	$timer1.Enabled = $True
	$timer1.Interval = 1000
	$timer1.add_Tick($timer1_Tick)
	#endregion Generated Form Code

	#----------------------------------------------

	#Save the initial state of the form
	$InitialFormWindowState = $form1.WindowState
	#Init the OnLoad event to correct the initial state of the form
	$form1.add_Load($Form_StateCorrection_Load)
	#Clean up the control events
	$form1.add_FormClosed($Form_Cleanup_FormClosed)
	#Show the Form
	return $form1.ShowDialog()

} #End Function

Call-Demo-TImerTick_pff | Out-Null

[jvierra]

Here is the checkbox event to turn the timer on and off:

PowerShell Code

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$checkboxTimerControl_CheckedChanged={
	#TODO: Place custom script here
	$timer1.Enabled=-not $timer1.enabled
}

[soccsupport]

Thank you.

[jvierra]

Please note that, once you lern/understand how WIndows FOrms system is designed (engineered) to work you will find that the great number of events are designed to allow us to use only the very smallest amount of code to make something happen.

There are forms design tools that can do all of teh event hookups by just dragging and dropping cotrols and by selecting a transactoin or trsnformation based on a list of possible actions.

Windows Forms is designed to support tools that build forms. The Sapien Forms builders are excellent examples of the implementation of the Microsoft design used to support PowerShell's use with Windows Forms.