/// <summary>
/// Perform draw of content using provided memento.
/// </summary>
/// <param name="context">Render context.</param>
/// <param name="displayRect">Display area available for drawing.</param>
/// <param name="palette">Content palette details.</param>
/// <param name="memento">Cached values from layout call.</param>
/// <param name="orientation">Visual orientation of the content.</param>
/// <param name="state">State associated with rendering.</param>
/// <param name="composition">Drawing onto a composition element.</param>
/// <param name="glowing">If composition should glowing be drawn.</param>
/// <param name="allowFocusRect">Allow drawing of focus rectangle.</param>
public override void DrawContent(RenderContext context,
Rectangle displayRect,
IPaletteContent palette,
IDisposable memento,
VisualOrientation orientation,
PaletteState state,
bool composition,
bool glowing,
bool allowFocusRect)
{
Debug.Assert(context != null);
Debug.Assert(memento != null);
Debug.Assert(memento is StandardContentMemento);
// Validate parameter references
if (context == null) throw new ArgumentNullException("context");
if (palette == null) throw new ArgumentNullException("palette");
Debug.Assert(context.Control != null);
Debug.Assert(!context.Control.IsDisposed);
// Cast the incoming memento to the correct type
StandardContentMemento standard = (StandardContentMemento)memento;
if (standard.DrawImage)
{
DrawImageHelper(context,
standard.Image,
standard.ImageTransparentColor,
standard.ImageRect,
orientation,
palette.GetContentImageEffect(state),
palette.GetContentImageColorMap(state),
palette.GetContentImageColorTo(state));
}
if (standard.DrawShortText)
{
using (GraphicsTextHint hint = new GraphicsTextHint(context.Graphics, standard.ShortTextHint))
{
// Get the rectangle to use when dealing with gradients
Rectangle gradientRect = context.GetAlignedRectangle(palette.GetContentShortTextColorAlign(state), standard.ShortTextRect);
// Use standard helper routine to create appropriate color brush
Color color1 = palette.GetContentShortTextColor1(state);
PaletteColorStyle colorStyle = palette.GetContentShortTextColorStyle(state);
using (Brush colorBrush = CreateColorBrush(gradientRect,
color1,
palette.GetContentShortTextColor2(state),
colorStyle,
palette.GetContentShortTextColorAngle(state),
orientation))
{
if (!AccurateText.DrawString(context.Graphics,
colorBrush,
standard.ShortTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.ShortTextMemento))
{
// Failed to draw means the font is likely to be invalid, get a fresh font
standard.ShortTextMemento.Font = palette.GetContentShortTextNewFont(state);
// Try again using the new font
AccurateText.DrawString(context.Graphics,
colorBrush,
standard.ShortTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.ShortTextMemento);
}
}
Image shortImage = palette.GetContentShortTextImage(state);
PaletteImageStyle shortImageStyle = palette.GetContentShortTextImageStyle(state);
// Do we need to draw the image?
if (ShouldDrawImage(shortImage))
{
// Get the rectangle to use when dealing with gradients
Rectangle imageRect = context.GetAlignedRectangle(palette.GetContentShortTextImageAlign(state), standard.ShortTextRect);
// Use standard helper routine to create appropriate image brush
using (Brush imageBrush = CreateImageBrush(imageRect, shortImage, shortImageStyle))
{
if (!AccurateText.DrawString(context.Graphics,
imageBrush,
standard.ShortTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.ShortTextMemento))
{
// Failed to draw means the font is likely to be invalid, get a fresh font
standard.ShortTextMemento.Font = palette.GetContentShortTextNewFont(state);
AccurateText.DrawString(context.Graphics,
imageBrush,
standard.ShortTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.ShortTextMemento);
}
}
}
}
}
if (standard.DrawLongText)
{
using (GraphicsTextHint hint = new GraphicsTextHint(context.Graphics, standard.LongTextHint))
{
// Get the rectangle to use when dealing with gradients
Rectangle gradientRect = context.GetAlignedRectangle(palette.GetContentLongTextColorAlign(state), standard.LongTextRect);
// Use standard helper routine to create appropriate color brush
Color color1 = palette.GetContentLongTextColor1(state);
PaletteColorStyle colorStyle = palette.GetContentLongTextColorStyle(state);
using (Brush colorBrush = CreateColorBrush(gradientRect,
color1,
palette.GetContentLongTextColor2(state),
colorStyle,
palette.GetContentLongTextColorAngle(state),
orientation))
{
if (!AccurateText.DrawString(context.Graphics,
colorBrush,
standard.LongTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.LongTextMemento))
{
// Failed to draw means the font is likely to be invalid, get a fresh font
standard.LongTextMemento.Font = palette.GetContentLongTextNewFont(state);
AccurateText.DrawString(context.Graphics,
colorBrush,
standard.LongTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.LongTextMemento);
}
}
Image longImage = palette.GetContentLongTextImage(state);
PaletteImageStyle longImageStyle = palette.GetContentLongTextImageStyle(state);
// Do we need to draw the image?
if (ShouldDrawImage(longImage))
{
// Get the rectangle to use when dealing with gradients
Rectangle imageRect = context.GetAlignedRectangle(palette.GetContentLongTextImageAlign(state), standard.LongTextRect);
// Use standard helper routine to create appropriate image brush
using (Brush imageBrush = CreateImageBrush(imageRect, longImage, longImageStyle))
{
if (!AccurateText.DrawString(context.Graphics,
imageBrush,
standard.LongTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.LongTextMemento))
{
// Failed to draw means the font is likely to be invalid, get a fresh font
standard.LongTextMemento.Font = palette.GetContentLongTextNewFont(state);
AccurateText.DrawString(context.Graphics,
imageBrush,
standard.LongTextRect,
context.Control.RightToLeft,
standard.Orientation,
composition,
glowing,
state,
standard.LongTextMemento);
}
}
}
}
}
// Do we need to show this content has the focus?
if (allowFocusRect && (palette.GetContentDrawFocus(state) == InheritBool.True))
{
// Place the rectangle 1 pixel inside the content display area
displayRect.Inflate(-1, -1);
// Use window forms provided helper class for drawing
ControlPaint.DrawFocusRectangle(context.Graphics, displayRect);
}
}
/// <summary>
/// Gets the image alignment for the short text.
/// </summary>
/// <param name="style">Content style.</param>
/// <param name="state">Palette value should be applicable to this state.</param>
/// <returns>Image alignment style.</returns>
public override PaletteRectangleAlign GetContentShortTextImageAlign(PaletteContentStyle style, PaletteState state)
{
IPaletteContent inherit = GetInherit(state);
return(inherit?.GetContentShortTextImageAlign(state) ?? Target.GetContentShortTextImageAlign(style, state));
}
/// <summary>
/// Gets the image alignment for the short text.
/// </summary>
/// <param name="state">Palette value should be applicable to this state.</param>
/// <returns>Image alignment style.</returns>
public override PaletteRectangleAlign GetContentShortTextImageAlign(PaletteState state)
{
return(_inherit.GetContentShortTextImageAlign(state));
}