I am currently working on a project in VB.NET and I have a fixed-border form with the AutoScroll property set to True. Under the Load event, I have some loops that add a bunch of controls to the form, so I have AutoScroll create the scrollbar for me automatically.
Now when I open up this form, all the controls load up with no problem, it focuses on my first text box, and the scroll bar shows up. However, the mouse wheel does not do anything whatsoever.
So my question is, how do I, no matter where my focus or mouse is, scroll with the AutoScroll property enabled, in VB.NET?
as far as i know, scrolling is only enabled when focusing the appropriate element. but should be able to trigger scrolling by catching onmouseover() or similar...
this is somthing similar (just for a datagrid) scrolling datagridview without get focus
Related
I want to prevent my form from automatically scrolling when a control at the bottom is focused but still keep the scrollbars if they ever appear.
Since some users have a slightly lower screen's resolution than the form, the scrollbars do sometimes appear. This created a problem with some DataGridView. Since the AutoScroll option is enabled, when clicking the DataGridView, it does a multiselect since we click and it moves.
When I disable the AutoScroll property, the scrollbars go away. Therefore, the user can't see everything.
Is there a way to disable the AutoScroll, but still keep the scrollbar?
If I understand your situation correctly, you basically want the user to have the ability to scroll the form manually but prevent the form from scrolling automatically to the control that gets focused.
Put this code in your form:
Protected Overrides Function ScrollToControl(activeControl As Control) As Point
'Return MyBase.ScrollToControl(activeControl) ' <-- Keep this line commented.
End Function
Result:
I created an interface it has several forms you can switch between using a panel as the parent form. My problem is that when i switch between my forms on the second time i open a form if that form has autoscroll on a panel it will not allow you to scroll and the window is stuck on the view you previously had.
In this image i open the form internet. after doing so i will click on instruction( any form switch triggers this)
now i open the same form again and the scroll bar is gone and it locks in on the last position the form was in.
the very curious thing in this is that this only happens on the internet form word also has a scroll bar however even though the properties and settings for both are identical only one does not work.
What could be causing this and how do i go about troubleshooting errors like this.
The forms are removed from the panel and re-added, they are not closed.
Assumption 0:
The forms are removed from the panel and re-added, they are not
closed.
Store the state of panel autoscroll and set it after you have re-added it. Note that if you add controls to the panel first and panel is not docked, then scroll will not appear because panel dimensions can be huge. You should set following property as well:
vScrollBar1.Vericalscroll.Value = 0
Assumption 1:
I assume what is actually going on is that you do not add controls to that panel, but to the form behind it or something similar. In that case - program is correct, you just asked it to do a wrong thing.
Assumption 2:
Assuming is panel is anchored top, left, bottom, right. There is currently a limitation in Windows Forms that prevents all classes derived from ScrollableControl from acting properly when both RightToLeft is enabled and AutoScroll is set to True.
Manual : link
Assumption 3:
You add the controls back, by recreating them, but forget to add handlers or create them in order where scrollbar is out of view. Instead of absolute positions you could use dockstyle:
Dim vScrollBar1 As VScrollBar = New VScrollBar
vScrollBar1.Dock = DockStyle.Right
Controls.Add(vScrollBar1)
I have a set of controls inside of a Panel and set the AutoScroll property of the panel to True so I get the Vertical ScrollBar but when I slide the bar is not smooth and if some of the upper controls inside the panel have the focus the bar return to the top.
I read some about and found a solution on
smooth scroll with autoscroll
Which work Ok but uses a lot of resources, I see it on Windows Task Manager, one of the processors goes about 60%, so I think is something wrong with this.
There's another way to met the same goal?
I tried to put my own VerticalScrollBar unsuccessfully. :(
Please excuse my lack of familiarity with vb.net. Just got thrown on a project with no vb.net experience.
I have to add some things to an application that was written by somebody who is no longer in the picture. I have to add more textboxes into a groupbox and when I do that it exceeds the size of the form. How can I make it so that I can scroll through the groupbox?
GroupBox, as it doesn't derive from ScrollableControl, so itself can't have scrolling functionality.
So...
Place the GroupBox inside a panel, and set the panel AutoScroll to true.
Guides:
Adding a panel control
Setting properties (of anything)
Moving content is just simply selecting all the elements you want to move, and click and drag them into the new place.
You could set the AutoSize property of the groupbox to true, and then set the AutoScroll of the form to true as well. This should resize the groupbox so that everything in it is visible, and then the form will have a scrollbar. If you don't want to make your form have a scrollbar for some reason, then you could use a panel and set it's AutoScroll to True so that just the panel has a scrollbar.
Add a Panel with no border inside the GroupBox to group your controls (put the controls inside). Then:
Panel1.ScrollBars = ScrollBars.Vertical
Or even ScrollBars.Auto.
GroupBox doesnt have scrolling functionality itself. Most likely most simple solution here is to just put a Panel inside the groupbox and add the textboxes to the panel instead.
Kinda new here but needed help and a good friend suggested this site.
My problem is I have a data grid in Visual Basic, it works fine but as the columns extend past the width of the window I needed a scroll bar. This is where the problem arose. When a column past the 4th is clicked the scrollbar will shift to give it focus. As there are check boxes here they are constantly clicked and when they are the scroll bar shifts but the button isn't checked and must be clicked again.
I was hoping there was a way to disable this Auto focus so clicking a column will not cause the scrollbar to move.
Any help would be greatly appreciated. ^__^
There is no real autoscroll in vb, one of the sub method was causing it to jump by checking another cell off the screen then defaulting back to the one shown which had the appearance of a jump.