protected override void OnKeyUp(KeyEventArgs e)
{
base.OnKeyUp(e);
var newValue = value;
if (!(e.Alt || e.Control || e.Shift))
{
if (e.KeyCode == Keys.Up)
{
if (!TriColorValueHelper.IsFirst(newValue))
{
newValue = TriColorValueHelper.PreviousValue(newValue);
e.Handled = true;
}
}
else if (e.KeyCode == Keys.Down)
{
if (!TriColorValueHelper.IsLast(newValue))
{
newValue = TriColorValueHelper.NextValue(newValue);
e.Handled = true;
}
}
}
Value = newValue;
}
public static TriColorValue NextValue(TriColorValue value)
{
if (IsLast(value))
{
throw new ArgumentOutOfRangeException();
}
value++;
return(value);
}
public static TriColorValue PreviousValue(TriColorValue value)
{
if (IsFirst(value))
{
throw new ArgumentOutOfRangeException();
}
value--;
return value;
}
public static TriColorValue PreviousValue(TriColorValue value)
{
if (IsFirst(value))
{
throw new ArgumentOutOfRangeException();
}
value--;
return(value);
}
public static TriColorValue NextValue(TriColorValue value)
{
if (IsLast(value))
{
throw new ArgumentOutOfRangeException();
}
value++;
return value;
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
TriColorValue newValue;;
if (ValueFromPoint(e.Location, out newValue))
{
Value = newValue;
}
}
/// <summary>
/// Find the rectangle (in client coordinates) for a given value
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public Rectangle RectFromValue(TriColorValue value)
{
switch (value)
{
case TriColorValue.Red: return(RedRect);
case TriColorValue.Yellow: return(YellowRect);
case TriColorValue.Green: return(GreenRect);
}
return(Rectangle.Empty);
}
/// <summary>
/// Find the rectangle corresponding to a given value
/// </summary>
private Rectangle RectForValue(TriColorValue value)
{
Rectangle rect;
switch (value)
{
case TriColorValue.Red: rect = RedRect; break;
case TriColorValue.Yellow: rect = YellowRect; break;
case TriColorValue.Green: rect = GreenRect; break;
default: rect = new Rectangle(); break;
}
return(rect);
}
// Raise appropriate events for the value changing
public void RaiseEventsForNewValue(TriColorValue oldValue, TriColorValue newValue)
{
// Since we support Value pattern, raise a PropertyChanged(Value) event
// Values are represented as strings.
NativeMethods.UiaRaiseAutomationPropertyChangedEvent(this,
UIA_PropertyIds.UIA_ValueValuePropertyId,
oldValue.ToString(),
newValue.ToString());
// Since we support Selection pattern, raise a SelectionChanged event.
// Since a top-level AutomationEvent exists for this event, we raise it,
// rather than raising PropertyChanged(Selection)
NativeMethods.UiaRaiseAutomationEvent(
this,
UIA_EventIds.UIA_SelectionItem_ElementSelectedEventId);
}
public TriColorFragmentProvider(TriColorControl control, IRawElementProviderFragmentRoot root, TriColorValue value)
: base((IRawElementProviderFragment)root /* parent */, root /* fragmentRoot */)
{
_control = control;
_value = value;
// Populate static properties
//
// In a production app, Name should be localized
AddStaticProperty(UIA_PropertyIds.UIA_NamePropertyId, _value.ToString());
AddStaticProperty(UIA_PropertyIds.UIA_ControlTypePropertyId, UIA_ControlTypeIds.UIA_CustomControlTypeId);
// In a production app, LocalizedControlType should be localized
AddStaticProperty(UIA_PropertyIds.UIA_LocalizedControlTypePropertyId, "tri-color item");
AddStaticProperty(UIA_PropertyIds.UIA_ProviderDescriptionPropertyId, "UIASamples: Tri-Color Fragment Provider");
AddStaticProperty(UIA_PropertyIds.UIA_AutomationIdPropertyId, _value.ToString());
AddStaticProperty(UIA_PropertyIds.UIA_IsKeyboardFocusablePropertyId, false);
AddStaticProperty(UIA_PropertyIds.UIA_IsControlElementPropertyId, true);
AddStaticProperty(UIA_PropertyIds.UIA_IsContentElementPropertyId, false);
}
public TriColorFragmentProvider(TriColorControl control, IRawElementProviderFragmentRoot root, TriColorValue value)
: base((IRawElementProviderFragment) root /* parent */, root /* fragmentRoot */)
{
_control = control;
_value = value;
// Populate static properties
//
// In a production app, Name should be localized
AddStaticProperty(UIA_PropertyIds.UIA_NamePropertyId, _value.ToString());
AddStaticProperty(UIA_PropertyIds.UIA_ControlTypePropertyId, UIA_ControlTypeIds.UIA_CustomControlTypeId);
// In a production app, LocalizedControlType should be localized
AddStaticProperty(UIA_PropertyIds.UIA_LocalizedControlTypePropertyId, "tri-color item");
AddStaticProperty(UIA_PropertyIds.UIA_ProviderDescriptionPropertyId, "UIASamples: Tri-Color Fragment Provider");
AddStaticProperty(UIA_PropertyIds.UIA_AutomationIdPropertyId, _value.ToString());
AddStaticProperty(UIA_PropertyIds.UIA_IsKeyboardFocusablePropertyId, false);
AddStaticProperty(UIA_PropertyIds.UIA_IsControlElementPropertyId, true);
AddStaticProperty(UIA_PropertyIds.UIA_IsContentElementPropertyId, false);
}
/// <summary>
/// Find the value for a given point on the control
/// </summary>
/// <param name="ptClient">Point in client coordinates</param>
/// <param name="value">Value for point</param>
/// <returns>true if value was found</returns>
public bool ValueFromPoint(Point ptClient, out TriColorValue value)
{
value = TriColorValue.Red;
var found = false;
if (RedRect.Contains(ptClient))
{
value = TriColorValue.Red;
found = true;
}
else if (YellowRect.Contains(ptClient))
{
value = TriColorValue.Yellow;
found = true;
}
else if (GreenRect.Contains(ptClient))
{
value = TriColorValue.Green;
found = true;
}
return(found);
}
public static bool IsLast(TriColorValue value)
{
return (value == TriColorValue.Green);
}
public static bool IsFirst(TriColorValue value)
{
return(value == TriColorValue.Red);
}
/// <summary>
/// Find the rectangle (in client coordinates) for a given value
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public Rectangle RectFromValue(TriColorValue value)
{
switch (value)
{
case TriColorValue.Red: return RedRect;
case TriColorValue.Yellow: return YellowRect;
case TriColorValue.Green: return GreenRect;
}
return Rectangle.Empty;
}
/// <summary>
/// Find the value for a given point on the control
/// </summary>
/// <param name="ptClient">Point in client coordinates</param>
/// <param name="value">Value for point</param>
/// <returns>true if value was found</returns>
public bool ValueFromPoint(Point ptClient, out TriColorValue value)
{
value = TriColorValue.Red;
var found = false;
if (RedRect.Contains(ptClient))
{
value = TriColorValue.Red;
found = true;
}
else if (YellowRect.Contains(ptClient))
{
value = TriColorValue.Yellow;
found = true;
}
else if (GreenRect.Contains(ptClient))
{
value = TriColorValue.Green;
found = true;
}
return found;
}
public static bool IsFirst(TriColorValue value)
{
return (value == TriColorValue.Red);
}
/// <summary>
/// Find the rectangle corresponding to a given value
/// </summary>
private Rectangle RectForValue(TriColorValue value)
{
Rectangle rect;
switch (value)
{
case TriColorValue.Red: rect = RedRect; break;
case TriColorValue.Yellow: rect = YellowRect; break;
case TriColorValue.Green: rect = GreenRect; break;
default: rect = new Rectangle(); break;
}
return rect;
}
// Raise appropriate events for the value changing
public void RaiseEventsForNewValue(TriColorValue oldValue, TriColorValue newValue)
{
// Since we support Value pattern, raise a PropertyChanged(Value) event
// Values are represented as strings.
NativeMethods.UiaRaiseAutomationPropertyChangedEvent(this,
UIA_PropertyIds.UIA_ValueValuePropertyId,
oldValue.ToString(),
newValue.ToString());
// Since we support Selection pattern, raise a SelectionChanged event.
// Since a top-level AutomationEvent exists for this event, we raise it,
// rather than raising PropertyChanged(Selection)
NativeMethods.UiaRaiseAutomationEvent(
this,
UIA_EventIds.UIA_SelectionItem_ElementSelectedEventId);
}
public static bool IsLast(TriColorValue value)
{
return(value == TriColorValue.Green);
}
