This latest version includes a multi-select
TreeView control which lets you choose a few different ways of selecting
There is a test project set up (
MWControlsTest) for testing all of the
MWTreeView: A Multi Select
TreeView Control (
MWScrollLabel: A Label Control that scrolls the text back and forth if it does not fit when the mouse is hovering over it.
MWScrollLabel Control also supports displaying the text in different directions:
Label control that uses
StringFormat.GenericTypographic, meaning that the text doesn't require a large blank area next to it.
MWLabel control also supports displaying the text in different directions:
Coding Technologies Used
- Multi-select for
CancelEventArgs so that
BeforeXXX event handlers can be set up allowing the programmer to cancel setting properties.
- A timer is used for the scrolling.
- GDI+ is used to draw everything (text and image)
- The text is rendered properly as disabled when the
Enabled property is set to
- A graphical Design Time Editor inheriting from
UITypeEditor is used for the
- Inheritance including overriding event handlers and programming around the fact that some methods, etc. in the parent control are hidden
UseMnemonic property is not used. (I don't intend to fix this myself. If someone has a solution, please let me know.)
HotTracking is turned on, the colors are not correct. (I will probably not fix this myself. If someone has a solution, please let me know.)
Version History and More about the Controls
MWTreeView control supports proper multi-select functionality. When I say proper, I mean better than any other free one I have seen out there (C# or other).
MultiSelect is a property of the
MWTreeView control and can be set to one of the following values:
NoMulti: Multi-selection is turned off. All other features are still available though, so it still works better than a normal
Multi: Free unrestricted multi-selection - any
TreeNodes can be selected.
TreeNodes can only be selected if they are in the same branch and on the same level.
TreeNodes can only be selected if they are in the same branch.
TreeNodes can only be selected if they are on the same level.
- Several keys now do things to the
MWTreeView: Ctrl+A selects all
TreeNodes (according to the restrictions imposed by the
MultiSelect property), etc, etc.
TreeNodes can be selected using the mouse in combination with the control, shift and alt keys.
- If the
MultiSelect property is set to a value other than
TreeNode has to be selected at all. and once one is selected, it can be deselected (control and mouse click).
FullRowSelect property of the original
TreeView control didn't seem to work (please correct me if I'm wrong). It has now been implemented.
- There is a massive amount of code (more than 3400 lines in the
MWTreeView class alone), so I guess this is an example (hopefully a good one) of how to subclass a control and add a lot of functionality.
MWControlsTest project has been added, making it really easy to test all the features of the
- Any new controls added to
MWControls can appear on a new
MWScrollLabel is a subclassed
Label control that can be set to scroll the text back and forth if the whole text does not fit. The way I am using this is by starting the scrolling when the mouse is hovering over the control.
- There are quite a few options that can be set to control the scrolling.
- Note that the
MWScollLabel control is only displaying its text on one line. This is intentional and coupled with its scrolling capabilities is really the whole reason for implementing this control.
StringFormat used by the text can be set to one of two options:
GenericDefault: This is the
StringFormat used by the original
StringFormat is much more precise when it comes to measuring the string.
- Using the
GenericTypographic option (default) means that if the text is right-aligned, it will indeed properly align to the right even for very long words with no white-space.
- The text direction can be set:
Normal: Normal horizontal text
UpsideDown: Horizontal text displayed upside down
Left: Vertical text that can be read by tilting your head to the left
Right: Vertical text that can be read by tilting your head to the right
- There is an option of displaying an image (the normal
Image property or the image from the
ImageIndex property) over the text or like the normal
Label control under the text.
- The image (the normal
Image property or the image from the
ImageIndex property), if one is used, is displayed very close to the applicable edge - not some strange arbitrary distance from the edge.
Mikael Wiberg 2003
Feel free to use this code as you wish, as long as you do not take credit for it yourself. If it is used in commercial projects or applications, please mention my name. Feel free to donate any amount of money if this code makes you happy. ;) Use this code at your own risk. If your machine blows up while using it - don't blame me.
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