I'm showing a ToolTip on a certain button's MouseHover event. If I go over it once it works but if I leave, wait for the tooltip to disapear and come back on the button, it appears twice. I tried cancelling it on MouseLeave but it still appear twice the seocnd time.
Private Sub someButton_MouseHover(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles someButton.MouseHover
Dim tooltipSearch As New ToolTip()
tooltipSearch.Show("I'm a tooltip"), someButton)
End Sub
Private Sub someButton_MouseLeave(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles someButton.MouseLeave
Dim toolTip As New ToolTip()
toolTip.GetToolTip(someButton)
toolTip.Hide(someButton)
toolTip.Dispose()
End Sub
Am I missing something obvious?
You are using the ToolTip not in the way it should be used (also look at the documentation :) ). It is just like any other control, start by dragging it onto your form (like you do with other controls).
If you have no dynamic text to be displayed in your tooltip, you can easily set the text in your constructor, using the method SetToolTip. If you do want some dynamic text, you can use this method in your MouseHover event.
Apart from that, you shouldn't do anything anything else. Just set the right delays on your tooltip and it should work all fine.
Private Sub someButton_MouseHover(sender As Object, e As System.EventArgs) _
Handles someButton.MouseHover
ToolTip1.SetToolTip(someButton, "My name is Steve chamba from south Africa")
End Sub
The answer about dragging the ToolTip control to the form is great. There is a subtlety with Button controls though. They seem to automatically set the tool tip to the text of the button, so if you also call ToolTip1.SetToolTip(myButton, "Button Text") then dot-net draws two copies of the tool tip text when you hover over the button.
Related
I have a gridview that is populated and a button outside the gridview that I want to enable editing on the selected row when clicked. I have this in the code behind. What goes in the btn_click event to invoke the grid view editing?
Protected Sub GridView1_RowEditing(ByVal sender As Object, ByVal e As GridViewEventArgs)
GridView1.EditIndex = e.NewEditIndex
FillGrid()
End Sub
Protected Sub btnEdit_Click(ByVal sender as Object, ByVal e As System.EventArgs) Handles btnEdit.Click
What goes here??
End Sub
There is a problem with this approach.
"GridView1_RowEditing" is expecting a row index, so it can turn on "EditItemTemplate" accordingly, correct?
But If you want to click on button outside of Gridview and make entire Gridview editable, you shouldn't trigger GridView1_RowEditing, since you don't know what editindex to pass.
You need to implement editable control(textbox) as part of "ItemTemplate", not in "EditItemTemplate".
And visibility of this control would be controlled by the outside button you have created, which will flag the visibility on / off.
Please review following link, this demonstrates how it should be implemented.
http://highoncoding.com/Articles/219_GridView_All_Rows_in_Edit_Mode.aspx
I'm making a desktop application in vb.net. When I click the back button (placed by me) on any form it hides current form and shows previous form but when i go again to the form from which i had hit back button then the focus cue still remains on the back button but I want the focus to be on the first textbox on that form or any specific button on which I want.....How can i achieve this...
I have already used some code to shift focus from one textbox to another when i press enter key...but it doesn't work in the above mentioned case....I'm using vb.net in visual studio 2005...
This is the code i'm using for shifting focus among textboxes
Private Sub party_code_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles party_code.KeyDown
If e.KeyData = Keys.Return Then
party_name.Focus()
End If
End Sub
Can anyone help me on this????
You need to add a handler for either the form's Activated event:
Private Sub Form1_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
party_name.Focus()
End Sub
I can't seem to get input focus on a textbox when a tab page first comes up (I'm using Windows Forms, VB.NET 3.5).
I have a textbox on a panel on a tab page, and I want the focus to be on the textbox when the tab page comes up. I want the user to be able to start typing immediately in the focused textbox without having to click on the textbox. I have tab stops set in the order I want and the textbox is the first tab stop. The tab stops work except that when the tab page comes up the focus is not on the textbox, i.e. the one that's first in the tab order.
In the Enter event handler of the tab page I call the Focus method of the text box, but it returns False and does nothing, no error messages. I know I can access the text box because
at the same point in the code I can set the text of the text box.
If it matters, the layout of the tab page is a little complicated:
frmFoo/TabControl1/TabPageX/Panel1/Panel2/TextBox1
I want to set the focus on TextBox1.
What's the best way to get the focus on the desired textbox?
If setting focus is the best way, why is the textbox.Focus() method failing?
I would assume you are attempting to set focus in the form load event handler? If so, you need to do a Me.Show() to actually create the onscreen controls before focus can be set. Something along the lines of:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.Show()
Application.DoEvents()
TextBox1.Focus()
End Sub
If you don't do the Me.Show(), the form is NOT displayed until the load event is complete.
For the tab control, handle the _SelectedIndexChanged event:
Private Sub TabControl1_SelectedIndexChanged(sender As Object, e As System.EventArgs) _
Handles TabControl1.SelectedIndexChanged
If TabControl1.SelectedTab.Name = "TabPage1" Then
TextBox2.Focus()
End If
If TabControl1.SelectedTab.Name = "TabPage2" Then
TextBox4.Focus()
End If
You will still want to set the initial focus in the load event as shown above if the first field selected is to be the textbox on the tab control.
Try either:
Me.ActiveControl = TextBox1
or
TextBox1.Select()
Do the control.Focus() in the OnShown event. You don't need any of the DoEvents logic which didn't work for me anyway.
You Should Use Selected Event of TabControl
Private Sub TabControl1_Selected(ByVal sender As Object, ByVal e As System.Windows.Forms.TabControlEventArgs) Handles TabControl1.Selected
If e.TabPage.Name = "TabPage1" Then
TextBox1.Select()
End If
End Sub
As I have Checked in Both TabControl.Selected and TabPage.Enter Event can set Select TextBox. I think there is some other elements stealing focus. please varify
Any of the solutions I found online don't solve the problem when the control is on a tab page.
However, this works:
(1) set the TabIndex of the control to 0.
(2) In your code that handles the tabpage event, do the following:
SendKeys.Send("{TAB}")
If SendKeys doesn't seem to be a valid statment, make sure you have the following import at the top of your code file:
Imports System.Windows.Forms
I found that the TabControl gets the focus when the Selected event completes. To make this work I used the Paint event of the TabPage to set the focus of the desired object.
Private Sub TabChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Tab1.Paint, Tab2.Paint, Tab3.Paint
Select Case sender.Name
Case "Tab1"
Textbox1.Focus()
Case "Tab2"
T3extbox2.Focus()
Case "Tab3"
Textbox3.Focus()
End Select
End Sub
Try the Activated event of the form like this:
Private Sub Form2_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
'SendKeys.Send("{TAB}") this line works too
TextBox1.Focus()
End Sub
That is guaranteed to work.
I once had the same problem but i solved it using the Me.activate() function.
there is a feature I'd like to implement in my application:
The user right clicks on my picturebox object. Good.
When that happens, some code of mine executes and will generate a list of options.
Then a menu appears where the mouse right-clicked, made up of these options.
When the user clicks on one of these options, the menu is deleted and some code is run given the option index as parameter.
My two problems:
How can I tell when the user right clicks? I can see an event handler for "click", but that includes left clicks....
How do I create one of these menus? I mean, go ahead and right click something. That's the kind of menu I'm looking for.
You need to implement the picturebox' MouseUp event. Check if the right button was clicked, then create a ContextMenuStrip with the menu items you want. You can use, say, the Tag property of the items you add to help identify them so you can give them a common Click event handler. Like this:
Private Sub PictureBox1_MouseUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseUp
If e.Button <> Windows.Forms.MouseButtons.Right Then Return
Dim cms = New ContextMenuStrip
Dim item1 = cms.Items.Add("foo")
item1.Tag = 1
AddHandler item1.Click, AddressOf menuChoice
Dim item2 = cms.Items.Add("bar")
item2.Tag = 2
AddHandler item2.Click, AddressOf menuChoice
'-- etc
'..
cms.Show(PictureBox1, e.Location)
End Sub
Private Sub menuChoice(ByVal sender As Object, ByVal e As EventArgs)
Dim item = CType(sender, ToolStripMenuItem)
Dim selection = CInt(item.Tag)
'-- etc
End Sub
To your first question: you actually handle just the "click" event, there is no separate event for right-click. But look at the EventArgs object you get passed for the event: it includes information of which button was pressed (and would give you more info if a mouse click had anything beyond that). So you check the button within an if block, and you're good to go.
To your second question: http://msdn.microsoft.com/en-us/library/system.windows.forms.contextmenustrip.aspx. If your menu is pre-defined, just look for that component on the Designer and prepare the menu from there and call its Show() method from the click handler. If you need to decide the menu entries on the fly, the linked documentation page actually includes an example on that ;)
PS: oops, I just noticed Jon's comment on the question. The answer I gave you is for Windows Forms. If you are on WPF let us know and I'll update with the details (although the concepts ain't too different).
There is actually an easier way to do this. Double-click on the control you wish to be able to right click. Now go to the top of the page and it should say in comboboxes; 'Control' and 'Click' Click on the 'click' combobox and look for: Right-Click. Use a ContextMenuStrip for your right click menu.
Now you can choose which function you want.
Private Sub PictureBox1_RightClick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.RightClick
ContextMenuStrip1.Show()
MsgBox("Content Activated.", MsgBoxStyle.Information, "Success!")
End Sub
Hope I could help. :)
Coridex73
Can I create a tooltip that will show up when a user moves his/her cursor over an image? I can't find such a property in Visual Studio, and I've scoured Google to no avail. I'm using an image in a PictureBox.
Here's to anyone out there on StackOverflow instead of some awesome Halloween party! Yay!
yea, for some reason the Picturebox doesnt have one.
imports System.Drawing
dim tt as new ToolTip()
tt.SetToolTip(picPicture, "This is a picture")
and dont worry, the weekend has only started, plenty of time to party.
Typically I create the interface then throw a ToolTip object from the Toolbox on to the form.
This then gives each object the "ToolTip" property (towards the bottom of the list) which can then be configured to your delight.
Drag a ToolTip control from the toolbox on the left onto your form (the designer will then put it below your form, since it's not meant to be visible normally). By default it will be named "tooltip1".
Then select your checkbox and go over to its properties window. You should see a property labeled "Tooltip on tooltip1" - set this to whatever you want. When you run the app and hold the mouse over your checkbox, you should see the tooltip text.
Assuming that you have added a picture box member with the WithEvents modifier you can use the following
Private tt As ToolTip = New ToolTip()
Sub OnPictureMouseHover(ByVal sender As Object, ByVal e As EventArgs) Handles PictureBox1.MouseHover
tt.Show("the message", Me)
End Sub
Sub OnPictureMouseLeave(ByVal sender As Object, ByVal e As EventArgs) Handles PictureBox1.MouseLeave
tt.Hide()
End Sub