Custom controls

Custom image

• Description:
  • Custom image control with additional image color transformations
• Functionality:
  • Custom control class inherit from Control class
  • One additional property Parameters of complex typy contains three properties
    • Gamma - float, gamma correction factor
    • Grayscale - bool, flag indicating if image is drawn in grayscale
    • Image - Image, the source of image
  • Each property has its own description, Gamma and Grayscale have default value defined as 1.0f and false respectively
  • Parameters property is located in Image category of the properties grid
  • At Parameters property level in the properties grid, a Gamma member value is shown and could be edited
  • Control cannot be moved and its size cannot be chaned with mouse in desing mode
  • In design mode a Grayscale item is added to the control's context menu, selecting of the item changes Grayscale property value
  • Value change of any property should be reflected in image drawing immediately
  • Demo project (Windows Froms) with control usage
  • 
• Hints:
  • DesignerAttribute, TypeConverterAttribute, CategoryAttribute, DescriptionAttribute, DefaultValueAttribute
  • ControlDesigner.SelectionRules, ControlDesigner.Verbs
  • TypeConverter.GetPropertiesSupported, TypeConverter.GetProperties
  • TypeDescriptor.GetProperties
  • ImageAttributes, ColorMatrix
• Approximate points:
  • custom control displaing an image: 1.0
  • complex type editable in properties grid: 2.5
  • grayscale item in desing mode contex menu: 2.0
  • disable of control moving and size changing in design mode: 1.0
  • fast grayscale drawing: 1.5
  • gamma correction: 1.0
  • demo project: 1.0

• Links for uploading:
  • Solutions
  • Corrections