/// <summary>
/// Initialize a new instance of the KryptonLinkLabel class.
/// </summary>
public KryptonLinkLabel()
{
// The link label cannot take the focus
SetStyle(ControlStyles.Selectable, true);
// Turn off the target functionality present in the base class
EnabledTarget = false;
// Create the override states that redirect without inheriting
_stateVisitedRedirect = new PaletteContentInheritRedirect(Redirector, PaletteContentStyle.LabelNormalControl);
_stateNotVisitedRedirect = new PaletteContentInheritRedirect(Redirector, PaletteContentStyle.LabelNormalControl);
_statePressedRedirect = new PaletteContentInheritRedirect(Redirector, PaletteContentStyle.LabelNormalControl);
_stateFocusRedirect = new PaletteContentInheritRedirect(Redirector, PaletteContentStyle.LabelNormalControl);
OverrideVisited = new PaletteContent(_stateVisitedRedirect, NeedPaintDelegate);
OverrideNotVisited = new PaletteContent(_stateNotVisitedRedirect, NeedPaintDelegate);
OverrideFocus = new PaletteContent(_stateFocusRedirect, NeedPaintDelegate);
OverridePressed = new PaletteContent(_statePressedRedirect, NeedPaintDelegate);
// Override the normal state to implement the underling logic
_inheritBehavior = new LinkLabelBehaviorInherit(StateNormal, KryptonLinkBehavior.AlwaysUnderline);
// Create the override handling classes
_overrideVisited = new PaletteContentInheritOverride(OverrideVisited, _inheritBehavior, PaletteState.LinkVisitedOverride, false);
_overrideNotVisited = new PaletteContentInheritOverride(OverrideNotVisited, _overrideVisited, PaletteState.LinkNotVisitedOverride, true);
_overrideFocusNotVisited = new PaletteContentInheritOverride(OverrideFocus, _overrideNotVisited, PaletteState.FocusOverride, false);
_overridePressed = new PaletteContentInheritOverride(OverridePressed, _inheritBehavior, PaletteState.LinkPressedOverride, false);
_overridePressedFocus = new PaletteContentInheritOverride(OverrideFocus, _overridePressed, PaletteState.FocusOverride, false);
// Create controller for updating the view state/click events
_controller = new LinkLabelController(ViewDrawContent, StateDisabled, _overrideFocusNotVisited, _overrideFocusNotVisited, _overridePressedFocus, _overridePressed, NeedPaintDelegate);
_controller.Click += OnControllerClick;
ViewDrawContent.MouseController = _controller;
ViewDrawContent.KeyController = _controller;
ViewDrawContent.SourceController = _controller;
// Set initial palette for drawing the content
ViewDrawContent.SetPalette(_overrideFocusNotVisited);
}
/// <summary>
/// Discover the preferred size of the element.
/// </summary>
/// <param name="context">Layout context.</param>
public override Size GetPreferredSize(ViewLayoutContext context)
{
Debug.Assert(context != null);
// Update text and image values
_contentValues.ShortText = ResolveText;
_contentValues.LongText = ResolveExtraText;
_contentValues.Image = ResolveImage;
_contentValues.ImageTransparentColor = ResolveImageTransparentColor;
// Find new enabled state
ItemEnabled = _provider.ProviderEnabled && ResolveEnabled;
// Update with enabled state
ViewDrawContent.SetPalette(ItemEnabled ? KryptonContextMenuCheckBox.OverrideNormal : KryptonContextMenuCheckBox.OverrideDisabled);
ViewDrawContent.Enabled = ItemEnabled;
ViewDrawCheckBox.Enabled = ItemEnabled;
// Update the checked state
ViewDrawCheckBox.CheckState = ResolveCheckState;
return(base.GetPreferredSize(context));
}
/// <summary>
/// Discover the preferred size of the element.
/// </summary>
/// <param name="context">Layout context.</param>
/// <exception cref="ArgumentNullException"></exception>
public override Size GetPreferredSize(ViewLayoutContext context)
{
Debug.Assert(context != null);
// Always update to the latest correct check state
if (_imageCanvas != null)
{
if (ResolveChecked)
{
_imageCanvas.ElementState = PaletteState.CheckedNormal;
_imageCanvas.Enabled = ResolveEnabled;
}
else
{
_imageCanvas.ElementState = PaletteState.Normal;
_imageCanvas.Enabled = true;
}
}
PaletteDouble splitPalette;
// Make sure we are using the correct palette for state
switch (State)
{
default:
case PaletteState.Normal:
SetPalettes(KryptonContextMenuItem.StateNormal.ItemHighlight.Back,
KryptonContextMenuItem.StateNormal.ItemHighlight.Border,
KryptonContextMenuItem.StateNormal.ItemHighlight);
splitPalette = KryptonContextMenuItem.StateNormal.ItemSplit;
break;
case PaletteState.Disabled:
SetPalettes(KryptonContextMenuItem.StateDisabled.ItemHighlight.Back,
KryptonContextMenuItem.StateDisabled.ItemHighlight.Border,
KryptonContextMenuItem.StateDisabled.ItemHighlight);
splitPalette = KryptonContextMenuItem.StateDisabled.ItemSplit;
break;
case PaletteState.Tracking:
SetPalettes(KryptonContextMenuItem.StateHighlight.ItemHighlight.Back,
KryptonContextMenuItem.StateHighlight.ItemHighlight.Border,
KryptonContextMenuItem.StateHighlight.ItemHighlight);
splitPalette = KryptonContextMenuItem.StateHighlight.ItemSplit;
break;
}
// Validate incoming reference
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
// If we have image display
if (_fixedImage != null)
{
Image itemColumnImage = ResolveImage;
Color itemImageTransparent = ResolveImageTransparentColor;
// If no image found then...
if (itemColumnImage == null)
{
// Ensure we have a fixed size if we are showing an image column
if (_imageColumn)
{
itemColumnImage = _empty16x16;
itemImageTransparent = Color.Magenta;
}
switch (ResolveCheckState)
{
case CheckState.Checked:
itemColumnImage = _provider.ProviderImages.GetContextMenuCheckedImage();
itemImageTransparent = Color.Empty;
break;
case CheckState.Indeterminate:
itemColumnImage = _provider.ProviderImages.GetContextMenuIndeterminateImage();
itemImageTransparent = Color.Empty;
break;
}
}
// Decide on the enabled state of the display
ItemEnabled = _provider.ProviderEnabled && ResolveEnabled;
PaletteContextMenuItemState menuItemState = (ItemEnabled ? KryptonContextMenuItem.StateNormal : KryptonContextMenuItem.StateDisabled);
// Update palettes based on Checked state
PaletteTripleJustImage justImage = (ResolveChecked ? KryptonContextMenuItem.StateChecked.ItemImage : menuItemState.ItemImage);
_imageCanvas?.SetPalettes(justImage.Back, justImage.Border);
// Update the Enabled state
_imageContent.SetPalette(justImage.Content);
_imageContent.Enabled = ItemEnabled;
_textContent.Enabled = ItemEnabled;
SplitSeparator.Enabled = ItemEnabled;
_subMenuContent.Enabled = ItemEnabled;
if (_shortcutContent != null)
{
_shortcutContent.Enabled = ItemEnabled;
}
// Update the Text/ExtraText
_fixedTextExtraText.ShortText = ResolveText;
_fixedTextExtraText.LongText = ResolveExtraText;
// Update the Image
_fixedImage.Image = itemColumnImage;
_fixedImage.ImageTransparentColor = itemImageTransparent;
}
SplitSeparator?.SetPalettes(splitPalette.Back, splitPalette.Border);
return(base.GetPreferredSize(context));
}