A brief article showing how to display individual pages from a multi-page tiff file in the ImageBox control.
Entries tagged with 'winforms' Articles and information on C# and .NET development topics
One of the nice things about the Visual Studio WinForms designers are the guidelines it draws onto design surfaces, aiding you in perfectly positioning your controls. These guidelines are known internally as snap lines, and by default each visual component inheriting from
Control gets four of these, representing the values of the control's
Margin property. However, this default designer doesn't include an implementation for the
BaseLine snap line, which is used to align controls via their contained text. This article shows how to create a custom designer to allow your controls to easily include this alignment option.
Some weeks ago I was trying to make parts of WebCopy's UI a little bit simpler via the expedient of hiding some of the more advanced (and consequently less used) options. And to do this, I created a basic toggle panel control. This worked rather nicely, and while writing it I thought I'd write a short article on adding keyboard support to WinForm controls.
ColorGrid control is a fairly useful control for selecting from a predefined list of colours. However, it can take up quite a bit of screen real estate depending on how many colours it contains. This article describes how you can host a
ColorGrid in a standard
ToolStrip control, providing access to both the
ColorGrid and the
ColorPickerDialog, with some custom painting to show the active colour on the button to round it off.
I was recently using a
ComboBox control with the
DropDownStyle set to
Simple, effectively turning into a combined text box and list box.
However, when I wanted an action to occur on double clicking an item in the list I found that the control doesn't actually offer double click support. I suppose I should have just ripped out the combo box at that point and went with dedicated controls but instead I decided to extend
ComboBox to support double clicks.
In my last post, I described how to drag and drop items to reorder a
ListView control. This time I'm going to describe the exact same technique, but this time for the more humble
I can't remember when it was I first saw something being dragged with an insertion mark for guidance. Whenever it was, it was a long long time ago and I'm just catching up now.
This article describes how to extend a
ListView control to allow the items within it to be reordered, using insertion guides.
A brief article which describes how to create a definition ruleset to allow better Batch/Command style formatting in the DigitalRune/SharpDevelop Text Editor control.
The ColorPicker Controls have been updated to version 22.214.171.124.
This is a fairly substantial update, with quite a few bug fixes and enhancements to the code. I'll also briefly discuss plans for future updates to the library.
ImageBox control is already a versatile little control and I use it for all sorts of tasks. One of the features I recently wanted was to allow users to be able to select a source region, then adjust this as needed. The control already allows you to draw a selection region, but if you need to adjust that ... well, you can't. You can only draw a new region.
This article describes how to extend the
ImageBox to include the ability to resize the selection region. A older demonstration which shows how to drag the selection around has also been incorporated, in a more tidy fashion than the demo.