I'm working on a winforms application using C#. I have a form with background image, and a panel on that with transparent background. Some data and controls will be dynamically created on this panel.
This panel has a scroll bar, when I scrolls that background image is splitting and page and data is looking very odd.
Can anyone help me in fixing this issue? All I need that background image should not split on scrolling of the panel...
Thanks in Advance.
Suhasini
This seems to be a limitation on winforms. Check out this post for an explanation.
Related
My main form has a horizontal splitcontainer on it. The top portion contains an Object List View control found here.
I am using code from a previous C# transparent overlay form answer.
My issue seems to have something to do with the Object List View. Using the code from the answer above, the transparent form covers all controls perfectly, however when it gets to the Object List View it seems to draw darker over this specific control.
If I close the transparent overlay and bring a blank panel to the front, when I open the transparent overlay, it still shows this darker section as if the object list view control is still visible.
I would first like to know why this is happening. But I would also like to know how I can fix this so that the overlay is consistant.
In case you wish to test this I created a simple project to demonstrate the issue here
To replicate what happens...
Drag the splitcontainer down a little and click the Overlay button.
Close the overlay by clicking in the White Panel. Click the Blank Panel button then click the Overlay button again.
Please note that in the Plexiglass class, it is taking a panel as a parameter only for the sake of this demonstration, in my actual project, it takes the main form as a parameter.
EDIT
I changed the color from dark gray to white and it works perfectly. I am not sure why the dark gray was causing that issue, but I am pleased with the way it looks with white so I will stick with that.
For some reason, the Color.DarkGray BackColor attribute for the transparent form was causing the issue. Changing the BackColor to Color.White fixed this.
Thanks to Patrice Gahide for helping me.
Basically, I have a SemanticZoom control with a GridView inside it, and the GridView has a custom control inside it, but for simplicity, let's assume it's a simple red Border. The problem is that I'm trying to handle the Border's manipulation when scaling (set ManipulationMode to Scale) so that I can know when the user does a pinch out gesture and "Zoom In" into the Border (which is really another page), but by handling the Manipulation, I lose the ability to (1) use the SemanticZoom and (2) Scrolling the grid.
If you have used the Windows 8 photo app, you'll notice that they implement this feature somehow. If you pinch in into an image, the Page will go into SemanticZoom, but if you pinch out it will go into full screen mode. I want similar functionality, but I don't know how to achieve it.
Any ideas?
Thanks in advance.
I will use 2 SemanticZoom controls to achieve Photo App Effect.
I wanted to scroll the background image that is displayed on the panel.
I looked at how to programmatically change the background image on form c# but did not get any idea.
Is it possible in C#?
You could create a control inside the panel that has the background image, and then the panel has a scroll bar which would actually move the entire control inside the panel, resulting in a moving background. I hope that makes sense.
I´m using WinForms. I want to make a little class, which modifys controls to show it´s working.
I want to draw an overlay over for example a button. It should be a half-transparent gray.
After that i want to draw a ProgressBar on over it (in the center). Similar to This, except using a progress bar.
How can i realize this? I don´t want to set the position of the progressbar, just drawing it on the other one.
How could i do this?
Thanks :)
I have done something similar before.
You need to use Button.DrawToBitmap(Bitmap, Rectangle) to get the image of the button. Then make the Bitmap grayscale (there are multiple algorithms available for this; I have used the last one successfully although probably not originally from this site).
Now, I did this with an entire form instead of a button, but I disabled the form, and then covered the entire form with an image of itself, altered and then covered it with the progress bar (itself in a panel with other controls).
You could just as easily disable the button, cover it with a panel containing the image and the progress bar on top of it.
I need to get the background image of a Panel that's on another form. I'm using this as a texture in a DX application. I cannot use "CopyFromScreen" as any other control that is over the top will be included in the captured image. Maybe one approach would be to make a copy of the Panels Background bitmap into memory to share with the other app - don't know how to do this in C#.
Or is there some GDI method?
Many thanks in advance.
You can use objPanel.DrawToBitmap() function it will give the whole this what is on panel.
Have you checked Panel control to see if it has any properties that can return you the background image in bitmap format?.