Exemplo n.º 1
0
        public static CanvasDraw GetCanvasSize(double controlActualWidth, double controlActualHeight, int canvasWidth, int canvasHeight)
        {
            CanvasDraw cc = new CanvasDraw();

            double availableWidth  = controlActualWidth - CanvasMargin * 2;
            double availableHeight = controlActualHeight - CanvasMargin * 2;

            if (canvasWidth <= availableWidth && canvasHeight <= availableHeight)//不需要缩放
            {
                cc.CanvasWidth  = canvasWidth;
                cc.CanvasHeight = canvasHeight;
            }
            else//需要缩放
            {
                double finalWidth  = Math.Min(canvasWidth, availableWidth);
                var    finalHeight = finalWidth * canvasHeight / canvasWidth;
                if (finalHeight > availableHeight)
                {
                    finalHeight = availableHeight;
                    finalWidth  = finalHeight * canvasWidth / canvasHeight;
                }

                cc.CanvasWidth  = finalWidth;
                cc.CanvasHeight = finalHeight;
            }

            cc.Left  = (controlActualWidth - cc.CanvasWidth) / 2;
            cc.Top   = (controlActualHeight - cc.CanvasHeight) / 2;
            cc.Ratio = cc.CanvasWidth / canvasWidth;

            return(cc);
        }
Exemplo n.º 2
0
        private void init()
        {
            theCanvas.Children.Clear();

            border = new Rectangle();

            canvasDraw = CanosSizeUtility.GetCanvasSize(theCanvas.ActualWidth, theCanvas.ActualHeight, this.CanvasWidth, this.CanvasHeight);

            border.Width  = canvasDraw.CanvasWidth;
            border.Height = canvasDraw.CanvasHeight;
            border.SetValue(Canvas.LeftProperty, canvasDraw.Left);
            border.SetValue(Canvas.TopProperty, canvasDraw.Top);
            border.Stroke          = Brushes.LightBlue;
            border.StrokeThickness = 1;

            this.theCanvas.Children.Add(border);
        }