I was wondering... I have a WinForms System.Windows.Forms.ListView with a bunch of ListViewItems that I'm drawing using the View.List style. Each ListViewItem has a "SmallIcon" that I fetch from the ListView's SmallImageList.
My problem is that the icons are showing too close to the border on the left. I've tried to change the bounds and the ListViewItem's Position property to no avail.
Is there anyway to have some kind of offset to ListViewItems?
The Win32 listview control doesn't have any setting to increase the space between the icon and the label (in any view, not just List). Setting ListViewItem.Position does nothing when the ListView is in List view.
A low-tech solution would be to simply prefix every ListViewItem's Text value with a single space. Slightly ugly, but oh so easy to do.
If you really want to have pixel level control, you will have to owner draw it. As always, if you are doing anything with a .NET ListView, ObjectListView makes owner drawing your items trivial.
As mentioned already, prefixing the text of all your items with a space is a super simple way to add padding. This has a pretty significant drawback, however. Once you do this, you lose the ability to find items in the ListView by simply starting to type their name while the ListView has focus.
Try adding white space to the left of your small images.
If you're using 16x16 images change to 24x16 for example by adding 8 white (or ListView Background color) pixels to the left.
If you are in ListView View LargeIcons then you can postion the text using item.position
A screenshot would be nice for an example to see exactly what you're after.
Funny thing... the Windows Explorer uses the ListView to display files and folders. i usually run my view in Report or Detail mode. i just switched it to List view mode and see the exact problem that you're describing! Yikes. Might be a bug with the Win32 object and that particular view type!
A quick workaround might be to use a Report style for the ListView with a single column or perhaps implement something yourself. The FlowLayoutPanel in .Net would work very nicely as a starting point for a custom list view.
As you are using the View.List style, I suspect you'll either need to implement some custom drawing or consider padding your images. You could also look at overriding the ListView control and manipulating it's bounds by overriding SetBoundsCore or SetClientSizeCore (or similar).
However, if the ListView were set-up for View.Details view, this could be done using the ListViewItem.IndentCount property:
The IndentCount property can be used
only when the View property of the
containing ListView is set to Details,
and the SmallImageList property of the
ListView is set. Source:MSDN
If you set the StateImageList property you can add a space of 16 px before the icons. I think you can adjust this additional space by loading an image with matching width as first entry into the StateImageList. But I have not tested this.
This thread discusses the opposite problem.
Related
Alright, so I'm trying to figure out the best way to accomplish this for my rather unique case. I have a fullscreen WPF application where controls are added to a Grid dynamically and the user is given the option to freely move/resize them. The controls can be individually moved or resized anywhere on the parent Grid but I have prevented them from overlapping via their MouseMove events. They also cannot be moved outside of their container. Since the app will be running on machines with different monitor sizes, I need to take that into consideration when making the original layout. I have an initial layout that I would like to use, but it would seem that I'm out of options:
I first tried using rows and columns just to (initially) place the controls that are added. This method places them correctly but becomes a problem when I need to move or resize the elements because the control is already assigned to a particular row and column. I could try to use this method and then remove any rows/columns after placing the controls, but I don't think that would work well.
I've also considered a Viewbox, but that's not practical in my case for fairly obvious reasons (as it merely resizes the controls to fit the screen). I'd prefer not to use this because I would only need it to standardize my initial layout. That's it. I also don't want to mess up any text that will be displayed on the window.
So yeah, this is more of a "best practice" question because any solution I can think of would not look very professional or elegant. Feel free to ask any questions if you need clarification.
Edit: As an additional note, I'd prefer to stick with a Grid as opposed to a Canvas as my container.
Edit 2: Just to be clear, I would not need the specific (inital) layout after the first launch. When the program exits, the layout (Margins, Width & Heights, etc. for each element) is saved to a file to use for the next launch.
I've developed a number of kiosk/interactive applications using WPF. If you are trying to show the element transitions (while moving), then it might be best to use a parent Canvas and bind the Canvas.Left and Canvas.Top properties. You can mimic the grid alignment, using a Canvas, if you put in place mechanisms (e.g. Manipulation/Mouse events, converters) to make sure that the Canvas attached properties adjust to the row/column offsets.
It is not uncommon at all to use the Viewbox to mitigate display differences (and your use case is not "rather unique"). You set the Viewbox to a target resolution (e.g. 1920x1080) and allow the control to fill the available space. The other alternative would be to dynamically apply a content template based on the application window size/ratio.
After looking at multiple options, I've decided to just use a calculation to (sort of) simulate the behavior of rows/columns. Because my application is fullscreen, I can take my SystemParameters.PrimaryScreenWidth and SystemParameters.PrimaryScreenHeight to orient my layout. Using a combination of universal padding (static values) and ratio-based calculations (dynamic values), I can smoothly set my initial layout.
For instance, I'm dividing the width of my monitor by 6 (rounded up to avoid decimals) and using that (minus half the control's width) as the control's Margin.Left property, centering it on a 'column' of sorts.
Honestly, my initial layout is fairly simple right now, so we'll see if this will suffice going forward. Thanks to everyone who contributed to the question, and sorry if I was unclear on what I was asking.
I'm developing a windows form application using c#. How can I set a space between items in a checked list box?
You can't, increasing the font size is all you got. Not exactly a control that's suitable for a touch screen. You can re-implement it with ListBox.DrawMode and ControlPaint.DrawCheckBox().
The better selection here is a ListView with View = Tile, easy to hit with your thumb when you make the tile big enough. You can't use ListView.CheckBoxes anymore, using an icon is a good choice. Also automatically takes care of the user only selecting one item.
Looks like you could go with a ListView (which always always always ist the better choice anyway) and a (dummy) imagelist. See
here and here.
Just tried it and it's really easy: Add an imagelist to your form; set its imagesize width to something small and its height to your liking and apply it as the listview's stateimagelist. No need for any actual images.
No need to go for tiles and you could add prices in a 2nd column, even with a different font.. ListView rules ;-)
Let us see the final result! Yumm!!
Under the Behavior Properties, look for ColumnWidth
I'm trying to convert a form which I currently have in C# to Java, utilising layout managers. And it's turning out to be a nightmare.
I've tried setting the sizes of the components, however no difference is present. Also, I cannot get the labels and textboxes to move closer to each other.
For all of the buttons and text fields, just put then in a Panel that has nothing but that one item in it. That will prevent the button/textfield from filling the entire space in the layout.
Other than that the only thing it seems you need to do is put a bit of a margin around the whole thing so that your items aren't right up against the edges of the window.
Try GridBagLayout instead of GridLayout.
GridLayout forces all components to be the same size.
See also javax.swing.Box, to put the label - text field pairs in one pane.
I'm certain this can't be as complex as I'm finding it so far!
I'm trying to render a horizontal list of user controls. There will be a large number of them. So some form of Virtual list would be prefereable.
Each user control will contain an image and be selectable.
In Android/Flex/iOS this is trivial with their List Adapters, List Item Renderers etc... However in Win forms it seems very tricky indeed.
I've looked at ObjectListView setting the view mode to Tile. However there doesn't appear to be a way to render horizontally.
I've tried just populating a flow layout with my user controls. But the memory usage goes through the roof as it's loading images.
You could use FlowLayoutPanel container control and set its WrapContents to false and FlowDirection to LeftToRight (which is default). ...and, probably, AutoScroll to true.
EDIT
As to going out of memory, think of simulating virtualization by handling Scroll event and creating/disposing controls as needed.
Derive your own image control from Control and override OnPaint in order to draw the image yourself. Add a property for the path or name of a picture, but don't store the image itself in the control. Google for custom control c#.
Use a cache for the images. A good data structure for this is a circular buffer. This helps in keeping only a limited number of images in memory.
How can I make an item inside a ToolBar fill all the remaining available space? Or, how to right-align some items, since that would give me the same effect in my case.
Note that solutions which involve nesting another container (like a Grid) inside the ToolBar don't work since that disables the special behaviour ToolBar gives to it's items (like no normal borders and look, simple outline border on hover, not receiving focus after click, etc.).
Additionally, anyone knows how to get rid of the little button that would show additional icons that overflowed from the toolbar if I had any?
I ended up using this solution:
http://karlshifflett.wordpress.com/2008/01/23/wpf-sample-series-stretch-toolbar-width-of-window/
It's not ideal, but it works. I still don't know how to get rid of the dropdown on the end though.
You can remove the button at the end by re-templating the toolbar. You can likely solve your other query this way too.
I wrote up a soluton for creating a "space filling" label that dynamically sizes to allow to you "right-align" items in a toolbar. Check it out: WPF Toolbar Items HorizontalAligment="Right"