well what i want is this lets say i have a "panel" with the width 100 and height 100
now i want to place X objects witht the size 20 so when i add more 5 items it should have all items on one line
|Item1|Item2|Item3|Item4|Item5|
now if i would add one more then i want it to split it to 2 lines with 3 items on each row
|Item1|Item2|Item3|
|Item4|Item5|Item6|
and well i guess you get the point, iv tryed stack panel but i cant get it to work the way i want it to..
Edit:
well it doesnt matter that mutch if each row has an equal amount of items.. so a wrapPanel should do the job next problem -> Here
There's no standard WPF panel that will do this for you. The WrapPanel comes close, but it will not make sure that your rows are even. Your best bet is to implement your own panel. Here's a good example on codeproject
The WrapPanel should suit your needs:
Controls are positioned in either a
stack or row based on the Orientation
property. In addition to stacking, the
WrapPanel provides wrapping support
for contained controls. Thus if more
controls are added to a WrapPanel than
can be displayed by the width of the
WrapPanel, they are wrapped around to
form an additional stack or row.
To be honest, I haven't tried that specific requirement myself.
I guess you could use WrapPanel... but then you would get 2 lines, (5 items and 1 item)..
What would happen if you had, say.. 7 items?
I don't think you will be able to get a container control that does that automatically. You could have a Grid with two rows and a StackPanel in each row. As you add the items you would need to programmatically select which StackPanel to put each item into.
Related
I have a list of "Group" objects, each of which contains a list of "Option" objects, that show up as checkboxes. I want these to be displayed in a condensed fashion automatically without me having to layout the UI manually with something such as a Grid (which is what I've done in the past, and takes a lot of effort).
My groups have varying numbers of options, so the size of the container for the group is not the same across groups. I'm using a WrapPanel, but it leads to a fairly ugly design because each item in the WrapPanel appears to be slotted into the same size container:
I know I've done this in HTML/CSS/JS, where I can have it automatically condense the unused space. Is there something like this for WPF? My list of options is manually created, but I can add/remove options fairly easily in my code, so I would rather not have to manually recalculate things in a grid view.
I've looked at Is there any way to occupy blank space in WrapPanel automatically?, which sounds similar, but the answer to that question does not have an example and I could not figure out what I was actually supposed to change/use in the answer (my attempts using it did not make any difference at all to layout).
I guess you use Horizontal Orientation of WrapPanel, so every row have height as the maximum its element. Your problem isn't free space in the ends of rows, so the solution that you mentioned doesn't work for you. You can try to use Vertical orientation of WrapPanel, your wrappanel' elements look like they have similar width, possible it would look better.
In HTML, for a table (at least), one can style the element so that margins are merged. I.e. two adjacent rows both have top and bottom margins of 10, so the gap between these two rows will be 20. When their margins are merged, the gap is only 10.
Is there any way to achieve this in WPF?
There is no easy way to do this, and when you look at how WPF handles layout you'll see why, but also see that there is a hard way if you're up to it.
As you can see from the WPF source code for FrameworkElement, the MeasureCore sealed override method (which prevents us from overriding it further) adds the element's margins before returning with its desired size. Annoyingly, they seem to have a BypassLayoutPolicies option which would prevent this, but for reasons possibly ranging from short-sighted to sadistic, they made this internal so it's not an option. Thus the fully margined size of the element is what always winds up being assigned to DesiredSize, which is basically what all layout panels (StackPanel) etc. naively use to arrange the items during ArrangeOverride.
But therein is the solution, if you're willing to subclass all the panels and override their MeasureOverride and ArrangeOverride. Knowing the margin values of two adjacent children you could collapse their respective right/left or bottom/top margins together during the measure and arrange passes, by just subtracting the duplicative portion of the margin from their `DesiredSize's.
But if you're gonna subclass anyway, another option, which I would consider cleaner and a better practice overall, is to add a Spacing property to your subclassed Panels, which exists in the WinUI version of StackPanel. This would require you to either ensure that your child items all have zero margins, or to subtract their actual margin values out from their DesiredSize's. You would then add this spacing instead between the items during the arrange pass.
StackPanel is easy enough to extend this way as both passes are very simple. Grid, unfortunately, is a lot more complicated. VirtualizingStackPanel is probably out of the question... So this is by no means a silver bullet, but given how common StackPanel is, even just extending that control would cover a whole lot of ground and lead to much cleaner layouts IMO.
If I had more reputation I'd mark this as a duplicate of Is it possible to emulate border-collapse (ala CSS) in a WPF ItemsControl? . It looks as if this is kludgeable (for a ListBox at least) using a DataTrigger to check the value of preceding entries and set borders accordingly for null values.
Normally a WPF WrapPanel (Orientation="Vertical") will stack items vertically (and grow vertically) until it runs out of space from the parent container, and then it will "wrap" to the next column.
I want this functionality, but I want to add a hard limit to the number of items in a column. For instance, if my height is 100 and I have 3 items that are 30 pixels high, normally it could fit them all without wrapping. However, say I want to force it to wrap after 2. In that case, I want it to only grow to a height of 60, and wrap the 3rd item into the second column.
Is there something I can do to make this happen?
Maybe you can do it with the UniformGrid.
Use the Rows property to definie the amount of elements in vertical direction.
here is a nice little article about the available layout panels in WPF. If one of these does not fit the bill, you might have to build your own custom panel, here is a decent demo.
Im having 17 columns of datagrid in Silverlight. How can we print all columns in datagrid to print. Since there are more noumber of column, Im enabling Horizantal Scroolbar ,so tht user can scrollto lastcolumn easily.
During printing of silverligt datagrid, i could see contents which are shown in Silverlight Page , anything beyond scroll bar ,those images are cropped and not printed . Any solution for print all columns in datagrid even though beyond the screen width.
One more question, if i have datagrid with horizontal scrollbar enabled, datagrid.actualwidth always give 768 px but not from first column to last column width size
_mahens
If you can wait six months for Silverlight 5, then you can completely control the print layout and format it exactly the way you want. Until then I'm not sure if there is anything you can do.
You basically have 2 options here.
Shrink your datagrid using Scaling to make the whole grid fit on your page
Slice the grid into 2 grids (first half of the columns in the first grid, and the other half on the other), then print this as 2 separate pages. Of course you would have to take into account the height of the grid and print additional pages there as well if required.
Difficult? Yes, but achievable :)
I have a container whose size can change.
I will by dynamically creating instances of a user control and adding them to that container.
the size of the user control is fixed. what I want to do is, fit the most number of user controls in the container.
I think a good approach is to add the children horizontally until there is no more space to add another and then start another row.
Say, each row fits 3 children for a given width of the container. if it is expanded enough, it should automatically fit 4 children in a row.
Is there a container control (StackPanel Grid etc.) that I can use to host these user controls. What properties need to be changed.
On resizing the container, it should relocate the children so that the maximum children ae shown. Scrolling is okay as long as max are shown at any given time.
Is there a container that does this automatically? or should I manually create rows or panels or something and add n children to each - i.e., do it manually?
I think what you need is a WrapPanel.
There's a Panels Overview on the MSDN with a lot more information and links to specific types of Panel including the WrapPanel:
WrapPanel positions child elements in sequential position from left to right, breaking content to the next line at the edge of the containing box. Subsequent ordering happens sequentially from top to bottom or right to left, depending on the value of the Orientation property.
I think a good approach is to add the children horizontally until there is no more space to add another and then start another row.
This is exactly what a WrapPanel does.