C# DrawingContext.DrawText方法代码示例

            protected override void OnRender(DrawingContext dc)
            {
                string testString = "Formatted MML Document is displayed here!\nPlease implement the user oriented layout logic.";

                FormattedText formattedText = new FormattedText(testString, CultureInfo.CurrentCulture, FlowDirection.LeftToRight, new Typeface("Verdana"), 30, Brushes.Black);

                formattedText.MaxTextWidth = 280;
                formattedText.MaxTextHeight = 280;

                formattedText.SetForegroundBrush(new LinearGradientBrush(Colors.Blue, Colors.Teal, 90.0), 10, 12);

                formattedText.SetFontStyle(FontStyles.Italic, 36, 5);
                formattedText.SetForegroundBrush(new LinearGradientBrush(Colors.Pink, Colors.Crimson, 90.0), 36, 5);
                formattedText.SetFontSize(36, 36, 5);

                formattedText.SetFontWeight(FontWeights.Bold, 42, 48);

                dc.DrawRectangle(Brushes.White, null, new Rect(0, 0, 300, 300));

                dc.DrawText(formattedText, new Point(10, 10));
            }

        internal void Render(DrawingContext context, GradientBrush tabBackground, double offset)
        {
            // Do the horizontal offset first.
            (tabOuterPath.Transform as TranslateTransform).X = offset;
            (tabInnerPath.Transform as TranslateTransform).X = offset;

            Brush outerBrush = new SolidColorBrush(UIColors.CurvyTabOuterColor);
            context.DrawGeometry(Brushes.White, new Pen(outerBrush, 1), tabOuterPath);

            Brush innerBrush = new SolidColorBrush(UIColors.CurvyTabInnerColor);
            context.DrawGeometry(tabBackground, new Pen(innerBrush, 1), tabInnerPath);

            if (null == formattedText)
                RefreshFormattedText();

            // Finally, draw the display text on the tab.
            context.DrawText(formattedText, new Point(offset + (parentVisual.GapBetweenTabs + 8), 6));

            if (false != parentVisual.ShowCloseButton)
            {
                if (null == tabCloseButton)
                {
                    tabCloseButton = new PathGeometry();
                    tabCloseButton.Transform = new TranslateTransform(0, 0);
                    tabCloseButton.Figures = CreateButtonPathFigures();
                }

                Brush closeBrush = this.OverCloseButton ? Brushes.Black : Brushes.Gray;
                double closeOffset = parentVisual.TabWidth + parentVisual.GapBetweenTabs + 2;
                (tabCloseButton.Transform as TranslateTransform).X = offset + closeOffset;
                context.DrawGeometry(Brushes.Black, new Pen(closeBrush, 2), tabCloseButton);
            }
        }

 /// <summary>
 /// When overriden in a class, this method allows the execution of code whenever the element has been rendered
 /// </summary>
 ///<param name="drawingContext">The <see cref="DrawingContext"/> in which the element has been rendered</param>
 protected override void OnRender(DrawingContext drawingContext)
 {
     Media.Size textSize;
     Media.Rectangle layoutSlot;
     if (!string.IsNullOrWhiteSpace(this.Text)
         && this.Foreground != null)
     {
         textSize = DrawingContext.MeasureText(this.Text, this.Font);
         layoutSlot = LayoutInformation.GetLayoutSlot(this);
         layoutSlot = new Media.Rectangle(new Media.Point(layoutSlot.Position.X - textSize.Width / 2, layoutSlot.Position.Y - textSize.Height / 2), layoutSlot.Size);
         drawingContext.DrawText(this.Text, layoutSlot.Position, this.Font, this.Foreground);
     }
 }

 protected override void OnRender(DrawingContext drawingContext)
 {
     drawingContext.DrawText(this.Text, this.Position);
 }