I have a flowLayoutPanel which I am programatically adding new panelLayouts to. Each panelLayout has a pictureBox within it. It's all working nicely, but I need to detect when that picture box is clicked on. How do I add an event to the picture? I seem to only be able to find c# examples....
my code to add the image is as follows...
' add pic to the little panel container
Dim pic As New PictureBox()
pic.Size = New Size(cover_width, cover_height)
pic.Location = New Point(10, 0)
pic.Image = Image.FromFile("c:/test.jpg")
panel.Controls.Add(pic)
'add pic and other labels (hidden in this example) to the big panel flow
albumFlow.Controls.Add(panel)
So I assume somewhere when I'm creating the image I add an onclick event. I need to get the index for it also if that is possible! Thanks for any help!
Use the AddHandler statement to subscribe to the Click event:
AddHandler pic.Click, AddressOf pic_Click
The sender argument of the pic_Click() method gives you a reference to the picture box back:
Private Sub pic_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim pic As PictureBox = DirectCast(sender, PictureBox)
' etc...
End Sub
If you need additional info about the specific control, like an index, then you can use the Tag property.
Substitute PictureBox1 with the name of your control.
Private Sub PictureBox1_Click(sender As Object, e As EventArgs) Handles PictureBox1.Click
'executes when PictureBox1 is clicked
End Sub
Related
I'm adding controls to a FlowLayoutPanel like this:
Dim box As New PictureBox
(I'm making the controls using code, then I'm using FlowPanelLayout1.Controls.Add(box)).
How do I make these controls do things? In my code I'm using For Each, so multiple are made using this, my goal is to make each one be able to do what I want and the code for each would be different. How can I achieve this goal?
I believe what you're after is AddHandler. AddHandler allows you to programmatically assign code to an event at runtime. So you can create a Sub specifically to handle events from the picture boxes you create.
You can also retrieve the control that raised the event. This allows you to modify it, or access it's tag, allowing you to attach data to the PictureBox when you add it to the FlowLayoutPanel.
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
'Create a new picturebox
Dim PB As New PictureBox With {.Size = New Drawing.Size(50, 50), .SizeMode = PictureBoxSizeMode.Normal}
PB.Image = Image.FromFile("res.png")
'Add it to the FlowLayoutPanel
FlowLayoutPanel1.Controls.Add(PB)
'Assign HandlePictureboxClick() to handle the PictureBox's DoubleClick event.
AddHandler PB.DoubleClick, AddressOf HandlePictureboxClick
End Sub
Public Sub HandlePictureboxClick(sender As Object, e As EventArgs)
'Retrive the control that raised the event (In this case, the one you double-clicked)
Dim Picturebox As PictureBox = CType(sender, PictureBox)
'Do whatever you want to do with it
Picturebox.SizeMode = PictureBoxSizeMode.Zoom
End Sub
The example above will change the PictureBox's size mode to zoom when the user double clicks on it, without modifying the other PictureBoxes in the FlowLayoutPanel
i want to add a tabcontrol tab by pressing on a button:
Dim inp As String
inp = TextBox6.Text
TabControl2.TabPages.Add(inp)
and when i open this tabpage some object should be already created like a button and a textbox, etc.
i havent found any type of onload events for a tabpage so i tried to add this with:
TabPage8.Controls.Add(New Button())
tabpage8 would be the name of the new created tabpage but like vb already told me, i cant add objects to a tabpage which doesnt exist at that time.
is there any way i can do that or have you any other ideas which could help me?
Your code is close. Try the following:
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
TabControl2.TabPages.Add("Test")
Dim tp = TabControl2.TabPages(TabControl2.TabPages.Count - 1)
Dim b = New Button()
b.Text = "My Button"
tp.Controls.Add(b)
AddHandler b.Click, AddressOf MyButton_Click
End Sub
Private Sub MyButton_Click(sender As Object, e As EventArgs)
MessageBox.Show("MyButton clicked")
End Sub
This code grabs the last page added and adds a button to it. It also configures the button as needed and adds an event handler.
I am creating an OS system called KernalOS With full functioning desktop But my problem is I want to be able to add an Icon when I click a button. I want the Icon to detect if mouse button was down / clicked.
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim newPictureBox As New PictureBox
newPictureBox.Visible = True
newPictureBox.Top = 20
newPictureBox.Width = 100
newPictureBox.Height = 50
newPictureBox.Left = 10
'add control to form
Controls.Add(newPictureBox)
newPictureBox.Location = New Point(100, 100)
End Sub
This code isn't working right so Idk what going on or why its not working. Please ask question I will fill you in with details. thanks Guys
Use the AddHandler Event:
newPictureBox.AddHandler, AddressOf newPictureBox_Click
newPictureBox.AddHandler, AddressOf newPictureBox_MouseDown
Now I'm not sure about how precise that is; you now have to write a
Private Sub newPictureBox_Click.
This is probably not the entire correct syntax, but you get the idea.
To start, hi to everyone im new to stackoverflow, and also new to programing (on 1ยบ year).
I've been searching but ive found nothing that answer my question, or maybe im just to newbie to understand the answers, so im sorry if its too simple, i cant see it!
/* my native lenguage is not english*/
Here is my problem, i'm making a VB form whit 200 pictureboxes that have to change or interact on click
i've made a control array whit all of them, like this:
Dim control(199) As PictureBox = Controles(control, 0)
Function Controles(ByRef control As Array, ByVal cont As Integer)
For Each pic As PictureBox In Me.Controls
control(cont) = pic
cont += 1
Next
Return control
End Function
this should asociate each picturebox to an array position, my problem now is how i can set the event handler to watch at control().click so no matter what box you click the event onclick will proc.
the only way i know is to create a click handler for each box manually.
hope i can find some answers
Using the Addhandler statement you can wire them all to the same routine. Then cast the sender object to interact with the PB that was clicked. OfType function.
Private Sub LoadME() Handles Me.Load
For Each pb As PictureBox In Me.Controls.OfType(Of PictureBox)()
'add all PB click events to a event sub
AddHandler pb.Click, AddressOf pb_Click
Next
End Sub
Private Sub pb_Click(sender As Object, e As EventArgs)
Dim pb = DirectCast(sender, PictureBox)
'this is the PB that was clicked
End Sub
I am new to VB and just can't figure it out how to animate a button using the MouseHover Event..
I want to create a single loop for all the buttons(picturebox) in my project that will increase the button's size when the user rests the mouse on it.
Maybe something like:
For Each Form As Form In Application.OpenForms
For Each Control As Control In Form.Controls
Tks. Any help is appreciated.
Use Inherits to create a new button (or PictureBox) class for you purpose. Here is the code.
Public Class cuteButton
Inherits System.Windows.Forms.Button
Protected Overrides Sub OnMouseHover(e As EventArgs)
'
'Wite code here to change button size or whatever.
'
MyBase.OnMouseHover(e)
End Sub
End Class
A very simple way is to use a common MouseHover event to grow your buttons (which I guess is really a Picturebox with an image in it):
Private Sub CustomButton_Grow(sender As Object, e As System.EventArgs) Handles Picturebox1.MouseHover, Picturebox2.MouseHover
'Set a maximum height to grow the buttons to.
'This can also be set for width depending on your needs!
Dim maxHeight as single = 50
If sender.Height < maxHeight then
sender.Size = New Size(sender.Width+1,sender.Height+1)
End if
End Sub
Then you can reset all buttons in a snap using the MouseLeave event. If you want that part animated as well then you can to use a global shrink routine that constantly shrink all buttons but the one in MouseHover. Good luck!
This Will Work even if you have 10,000 button or picture box ....
I am Assuming that you only have 1 form and many Buttons ,,, you have to be specific on your question
This Code will work fine with Buttons, Picturebox ,text box
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
For Each cntrl As Control In Controls ' Looping for each Button as Control
If TypeOf cntrl Is Button Then
AddHandler cntrl.MouseEnter, AddressOf cntrl_MouseEnter ' Adding the event and handler
AddHandler cntrl.MouseLeave, AddressOf cntrl_MouseLeave ' Adding the event and handler
End If
Next
End Sub
'' Assuming you wanna eNlarge everytime the mouse Hover or Enter
Private Sub cntrl_MouseEnter(sender As Object, e As EventArgs)
CType(sender, Button).Size = New Point(CType(sender, Button).Size.Width + 50, CType(sender, Button).Size.Height + 50)
End Sub
'' Here it goes back normal size
Private Sub cntrl_MouseLeave(sender As Object, e As EventArgs)
CType(sender, Button).Size = New Point(CType(sender, Button).Size.Width - 50, CType(sender, Button).Size.Height - 50)
End Sub