[RESOLVED] formLocation

I've been using a set of code to make a form appear directly underneath a button. I know I'm either using the wrong one, or one that would be easier for what I'm trying to do. I currently have two sets of code. One for when the window is in default normal size, and the other for when it is maximized. This is the code as follows:

Code:

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Dim formLocation = PointToScreen(TwitterButton.Location)
        formLocation.Offset(798, 30)
        TwitterPopupMenu.StartPosition = FormStartPosition.Manual
        TwitterPopupMenu.Location = formLocation
        TwitterPopupMenu.Show()
        If Me.WindowState = FormWindowState.Maximized Then
            formLocation.Offset(570, 2)
            TwitterPopupMenu.StartPosition = FormStartPosition.Manual
            TwitterPopupMenu.Location = formLocation
            TwitterPopupMenu.Show()

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The issue I currently have is that when the user manually adjusts the form size, neither of the codes are relevant any longer, and the popup forms will no longer appear in their appropriate locations. I'm quite positive that the codes I have here are not the correct ones, and that the one that I'm looking for can actually set the forms to launch in their places in this case, a button (which is what these are supposed to be doing, though quite honestly, I think there's just simply something botched up with these codes, and their just sneakily hiding under my nose). This is probably a duh thing (it's been one of those days :lol:)

Hi,

you should be using something like scaling / percentages


example using Top

if the button should be 2/3 way down the form then

buttontop = (form.height * 0.66) with this it doesnt matter how big the form is it will always stay in its perspective place, but you should apply limits to form size(keep it big enough to show all controls clearly)

menutop = (button.top + button.height) it doesnt matter were the button it this will always put the menu under it

try something like that

You're really never going to pin this down with absolute accuracy. Point conversion (to screen, to client) is simply not reliable enough especially when working with both client and screen co-ordinates as you are here. If you want a customised button with menu you'd be far better off creating a user control so that you have absolute ... er .. control over the placement of the control and its dropdowns/flyouts/popups and other assorted attachments.

The peculiar thing about it is that actually have a form set to launch directly underneath a button, and it works no matter how much the main form size changes, but yet the same sets of code being used for other forms will not. I've checked several times for differences in the two codes, and there is none at all.

Code:

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Dim formLocation = PointToScreen(QuickLaunchButton.Location)
        formLocation.Offset(-135, QuickLaunchButton.Height)
        DynamicQuickLaunch.StartPosition = FormStartPosition.Manual
        DynamicQuickLaunch.Location = formLocation
        DynamicQuickLaunch.Show()

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Note the code previously posted. The only exception is that the button height replaces the offset number in the previously posted code. But I don't believe that has any bearing of what's happening here due to the fact I'm not having the problem with that particular offset. I wish there was a way to replace the whole line of code that indicates the offset with something that simply indicates the location of the button opposed to the preset manual offset. Or better yet that the point to screen continues to update itself during runtime. I'm just curious why the same set of code behaves differently in almost the same exact environment. Besides that, the height offset differences would have nothing to do with it, because it behaves the exact same way before that offset was ever even changed. I don't know. Strange.

This code will display the form such that it's top-left corner is directly below the bottom-left corner of the Button:

Code:

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Dim formLocation = QuickLaunchButton.PointToScreen(New Point(0, QuickLaunchButton.Height))
        DynamicQuickLaunch.StartPosition = FormStartPosition.Manual
        DynamicQuickLaunch.Location = formLocation
        DynamicQuickLaunch.Show()

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Note the use of the Button's PointToScreen method, so you simply specify offsets from zero in both directions to determine the location of the form.

Quote:

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Originally Posted by dunfiddlin

Point conversion (to screen, to client) is simply not reliable enough especially when working with both client and screen co-ordinates as you are here...

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Actually, you're wrong. The conversions are very accurate. I developed an alert system that uses layered windows to highlight controls and I use such conversions to keep the alerts aligned to the controls and they work perfectly. If I told someone that the alerts themselves were not forms but controls, they'd have no reason to doubt it unless they saw the source code. That is how well they work.

Thank you very much jmcilhinney, that worked perfectly. Thank you everyone else for your help as well :).