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.NET Forum / Windows Forms / WinForm General / March 2008Pictureboxes moving on their own volition when form is displayed
I have a user control that has this structure from top to bottom: Label1 Label2 PictureBox1 Label3 PictureBoxes2 through 11 All of the controls are anchored Top,Left. Pictureboxes 2 through 11 are right next to each other in the designer, with 1 pixel of space between them. This user control is added to a form that has this structure: Form TopLevelSplitContainer TopLevelSplitContainer.Panel1 other stuff TopLevelSplitContainer.Panel2 justAPanel myUserControl aDGV Depending on something happening in the background, it displays the UserControl or the DGV. The problem is when I the UserControl is displayed in my form, it spaces out pictureboxes 2 through 11 and ends up chopping off the right side of the last picturebox. I am adding the UserControl programmatically, but even if I just drop it on the justAPanel in the designer, it does the same thing. If I don't anchor the controls on MyUserControl at all, they don't spread correctly vertically, and they are actually wider horizontally than they would be if I anchored them. When added programmatically to the form, the usercontrol is set to dock Left and Top. If I don't dock it, it seems to center it, which chops off both sides of the usercontrol. Any ideas why my controls are being rendered differently in run mode than they are in design mode? My containing form is a user control, too, by the way, which does sit in an actual Form that has a minimum size and a default size that this panel should fit into if it weren't mucking up my picturebox locations. The reason I have 10 picture boxes is because each one has its own click event. Just thought I'd throw that in there before someone says "Why don't you just combine the picture boxes into one?". Sorry for the cross-posting; I'm desperate. Thanks in advance. RobinS. GoldMail.com > I have a user control that has this structure from top to bottom: > [quoted text clipped - 53 lines] > RobinS. > GoldMail.com So here is what I figured out through trial and error. The panel on which my controls sit has an AutoScaleMode of "Font". Apparently when it renders, it scales up and repositions everything on the screen, which includes spacing the graphics out. When I set this to "None", the graphics stay in place. This is a little frustrating, because I have been tasked with changing all of the forms (and underlying user controls) to display correctly on a computer running "big fonts" (dpi=120). Right now, our app only looks right on 96-dpi setting. Before you post back and say "set autoscalemode to dpi", I'll pass on that I tried that, and I think the problem I'm having is that the distance on our splitter controls is hardcoded, as well as the default size of our application, and apparently I'm going to have to do some math to fix that problem. We don't want the user to be able to change the splitter position. Also, from what I've read about AutoScaleMode, if you set it to "Font", it will scale for both Font and DPI changes. We are not currently really supporting international users (many have our product, but it's all in English for the moment), but when we do, I assume I'm going to want the forms to scale by Font as well as by DPI. If anybody has any wisdom about the whole AutoScaleMode topic, I'd love to hear it, as this is looming quite large on my to-do list. Thanks very much. RobinS. GoldMail.com > [...] > If anybody has any wisdom about the whole AutoScaleMode topic, I'd love > to hear it, as this is looming quite large on my to-do list. It seems to me that if you're using any auto-scale mode, you necessarily give up the right to expect things to be presented exactly as you had originally designed them. It's possible that by setting the AutoSize and AutoSizeMode properties on appropriate controls (such as your UserControls) you get some different behavior that is more to your liking, or that you can implement your own auto-scale logic and set the form's scaling to "none". But at the end of the day, you're asking .NET to resize things according to some external information, and it shouldn't be too surprising that your carefully laid-out arrangement gets disturbed. It may be that the most appropriate solution is simply to not design something that is so sensitive to variations in size and position. Leave things some room to be scaled and adjusted without creating problems that are causing you to dislike the current behavior now. Pete >> [...] >> If anybody has any wisdom about the whole AutoScaleMode topic, I'd love [quoted text clipped - 18 lines] > > Pete I was hoping by setting autoscale mode that it would scale text, not pictures. That was my expectation. And why would it scale the positioning of the pictures without scaling the actual pictures as well? It seems inconsistent to me. If you are fortunate enough to only support applications where you can put a bunch of extra space in your panels in case the user has a higher DPI settings, then that's great. I don't have that luxury. I figured at this point I would go through each form and user control and see what works. We have what basically amounts to four panels on the screen with two across and two down. To make the panels large enough for the text to be okay when sized up would make the screen ugly for users having dpi set to 96 dpi. It is clear to me at this point that I am going to have to programmatically handle the sizing of some of the forms and splitters to display cleanely without a lot of extra space, and without being truncated. Thanks anyway. RobinS. GoldMail.com > I was hoping by setting autoscale mode that it would scale text, not > pictures. That was my expectation. And why would it scale the > positioning of the pictures without scaling the actual pictures as well? > It seems inconsistent to me. If it's scaling the picture, it's because you've set the PictureBox control to stretch the picture. Auto-scaling isn't going to directly affect how your images render, but it _will_ resize all of the controls that are affected, and if you've set your PictureBox to both auto-scale and stretch any contained image, then of course the image within will be scaled as well as the control itself changes size. As far as the auto-scaling stuff is concerned, the PictureBox is just like any other control. It doesn't treat it differently just because it's containing an image, nor is there any reason to expect that it would know or care. I don't find it inconsistent. If anything, it would be inconsistent for .NET to treat a PictureBox differently, especially given that there are image display modes for PictureBox that don't stretch the image. Pete >> I was hoping by setting autoscale mode that it would scale text, not >> pictures. That was my expectation. And why would it scale the [quoted text clipped - 18 lines] > > Pete Thanks, Pete. I'll buy that; it makes more sense when you put it that way. RobinS. GoldMail.com
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